KR102191214B1 - Drying apparatus - Google Patents

Abstract

The present invention relates to a drying device which comprises: a rotating drum provided with a drying chamber, and a drying drum having an inlet and an outlet, and rotated by receiving a rotating force from a drum rotating device; a raw material feeding device for feeding a raw material into the drying chamber; a crusher for crushing the raw material of the drying chamber; a hot air supplier having a deodorizing furnace and a blower to generate hot air; a hot air supply duct for connecting the rotating drum and the hot air supplier; a dried matter discharge duct having a dried matter discharge part for discharging the dried matter discharged from the outlet to the outside; an exhaust duct installed to surround the drying drum; a waste heat recovery pipe coupled to the rotating drum, and allowing exhaust gas flowing into the dried matter discharge duct to flow to the exhaust duct; and a heat recovery dust collector for centrifuging the exhaust gas of the exhaust duct to remove foreign substances, and supplying the exhaust gas from which foreign substances have been removed to the hot air supplier. Accordingly, a raw material can be quickly and efficiently dried.

Description

Drying device {DRYING APPARATUS}

The present invention relates to a drying apparatus, and more particularly, by crushing raw materials with high moisture content such as food residues or sludge and having a strong viscosity, and at the same time, by supplying hot air that recycles waste heat, energy can be effectively reduced to perform a drying process. It relates to a drying device.

Due to the recent industrial development and population increase, the amount of waste generated is increasing day by day. Waste causes environmental pollution, and useful resources contained therein are sometimes discarded, so it is important to efficiently treat and recover them.

Waste can be broadly classified into domestic waste generated in the living environment and workplace waste generated in industrial sites. Depending on the emission source, workplace waste is classified into general workplace waste, workplace emission waste, workplace construction waste, and workplace designated waste. These can be classified into organic and inorganic wastes in terms of the properties of the material they constitute.

In general, organic waste includes food waste, livestock manure, human meal, waste from agricultural and fishery processing, waste from food processing, and waste from slaughterhouses. These organic wastes have a high moisture content and a high concentration of pollutants that are discharged, making it difficult to treat, and are currently being treated by methods such as incineration, landfill, feed conversion, or fuel conversion.

Among them, incineration treatment requires enormous fuel costs and incineration residues such as dust or dioxin generated during incineration cause secondary environmental pollution. In the case of reclamation, it is difficult to secure a landfill site, and there is a problem that the surrounding soil and rivers are contaminated by leachate generated from waste. On the other hand, conversion of feed or fuel is a treatment method that can recycle waste as a raw material, and various studies have been conducted on this.

In order to recycle raw materials with high moisture content as compost, feed, or fuel, the work of reducing the moisture of the raw materials must be preceded above all. In order to rapidly reduce moisture contained in raw materials, a drying device using a burner is mainly used.

Currently, drying devices of various structures have been developed and used in various fields, but research and development to increase drying efficiency and reduce energy consumption are continuously being made.

Registered Patent Publication No. 1059894 (2011. 08. 29.)

The present invention has been devised in view of the above points, and an object of the present invention is to provide a drying apparatus capable of quickly and efficiently drying raw materials having a high moisture content while reducing energy consumption.

The object of the present invention is not limited to the above, and other objects not mentioned will be clearly understood by those skilled in the art from the following description.

The drying apparatus according to the present invention for achieving the above object includes a drying chamber for drying raw materials and a drying drum having an inlet and an outlet provided at one end and the other end to be connected to the drying chamber, respectively, and a drum rotating device A rotating drum that rotates by receiving rotational force from it; A raw material feeder for introducing raw materials into the drying chamber through the inlet; A crusher having a plurality of blades disposed in the drying chamber and rotating to crush the raw material in the drying chamber; A hot air supply unit having a deodorization furnace having a combustion chamber therein, a blower for blowing air into the deodorization furnace, and generating hot air for supplying the drying chamber; A hot air supply duct for rotatably supporting one end of the rotary drum and connecting the rotary drum and the hot air supply to introduce hot air supplied from the hot air supply to the drying chamber; A dry matter discharge duct that rotatably supports the other end of the rotating drum, is connected to the outlet, and has a dry matter discharge part for discharging the dry matter discharged from the outlet to the outside; An exhaust duct installed to surround the drying drum; It is coupled to the rotary drum so as to rotate with the rotary drum, an inlet is provided at one end to be connected to the inside of the dry matter discharge duct, and an outlet port connected to the inside of the exhaust duct is provided at the other end of the rotary drum. A waste heat recovery pipe for flowing exhaust gas flowing into the exhaust duct to the exhaust duct; And a heat recovery dust collector connected to the exhaust duct so as to remove foreign substances by centrifuging the exhaust gas of the exhaust duct and supplying the exhaust gas from which the foreign substances have been removed to the hot air supply, wherein the hot air supply is outside air. And exhaust gas supplied from the heat recovery dust collector are mixed, heated, and then supplied to the drying chamber.

The rotating drum may be arranged to be inclined so that the outlet is positioned lower than the inlet.

The waste heat recovery pipe is installed to be adjacent to the inner circumferential surface of the drying drum, and a plurality of the waste heat recovery pipes may be spaced apart from each other in the circumferential direction of the drying drum.

The rotary drum may include a sorting drum disposed at the other end of the drying drum so as to be connected to the outlet and having a plurality of discharge holes through which only dry matters of a predetermined size or less can pass.

The drying apparatus according to the present invention is installed inside the rotating drum so as to be parallel to the rotating central axis of the rotating drum but rotated about the rotating central axis of the rotating drum and eccentric with the rotating central axis of the rotating drum. A pressing roller for compressing the material; And a driver for providing a rotational force to the pressing roller.

The pressing roller may have a plurality of pressing protrusions that can be inserted into the discharge hole.

The drying apparatus according to the present invention may include a dry matter pulverizer having a plurality of blades disposed inside the sorting drum and rotating to crush the dry matter inside the sorting drum.

The drying apparatus according to the present invention may include a return conveyor for returning the dry matter that needs to be re-dried among the dry matter discharged from the dry matter discharge unit to the raw material feeder.

The dry matter discharging unit includes a normal discharging unit for discharging the dried material that has been dried, a return discharging unit for discharging the dried material that needs to be re-dried to the return conveyor, and a direction of discharging the dry matter to the normal discharging unit or the return discharging unit. It may include a switching member for discharging.

The drying apparatus according to the present invention comprises: a cooling housing having a cooling chamber, a dry matter inlet for introducing the dry matter discharged from the dry matter discharge unit into the cooling chamber, and a dry matter outlet for discharging the dried matter cooled in the cooling chamber; A transfer conveyor installed in the cooling chamber to transfer the dry matter input to the dry matter inlet to the dry matter outlet; And a cooling medium supply unit for supplying a cooling medium to the cooling housing.

The drying apparatus according to the present invention may include an exhaust dust collector connected to the dry matter discharge duct so as to remove foreign matter by centrifuging the exhaust gas discharged from the dry matter discharge duct.

The drying apparatus according to the present invention may include a partition coupled to the inner circumferential surface of the drying drum in order to delay the movement of the raw material moving from the drying chamber toward the outlet.

The partition may include a plurality of partition plates protruding from an inner circumferential surface of the drying drum, and the plurality of partition plates may be disposed on the inner circumferential surface of the drying drum in a circumferential direction.

The partition may be provided with a plurality of through holes through which only raw materials having a predetermined size or less can pass.

The drying apparatus according to the present invention may include a stay control plate coupled to the partition so that the height of the protrusion from the inner circumferential surface of the drying drum can be adjusted.

Foreign matter filtered by the dust collector may be re-introduced into the drying drum through the raw material feeder.

The drying apparatus according to the present invention includes a metering feeder that measures the weight of a raw material and supplies it to the raw material injector; And an extruder for extruding raw materials and supplying them to the metering feeder.

The shredder includes a shaft supporting the plurality of blades and having a space therein, and the drying apparatus according to the present invention further includes a cooling air supply unit configured to cool the shaft by supplying cooling air into the shaft. can do.

The drying apparatus according to the present invention as described above collects a certain amount of hot exhaust gas that is discarded after passing through the dryer, sends it to a deodorization furnace, burns the odorous substance at high temperature, deodorizes it, and flows it back into the dryer to use it as a heat source for the dryer. . Therefore, waste energy can be reused to significantly reduce fuel costs.

In addition, the drying apparatus according to the present invention can reduce the amount of exhaust gas discharged to the outside as much as the exhaust gas discharged from the dryer is reused, and thus the odor treatment capacity can be drastically reduced. Accordingly, there is an effect of reducing the cost of post-treatment of exhaust gas and reducing the amount of substances emitted to the atmosphere.

In addition, the drying apparatus according to the present invention can be re-dried by returning a dried product having a high moisture content among the dried material passing through the dryer.

The effects of the present invention are not limited to those described above, and other effects not mentioned will be clearly understood by those skilled in the art from the following description.

1 schematically shows a drying apparatus according to an embodiment of the present invention.
2 is a side view showing a dryer of the drying apparatus shown in FIG. 1.
3 is an excerpted view of a part of the dryer shown in FIG. 2.
4 is an excerpted view of another part of the dryer shown in FIG. 2.
5 is a front view showing a part of a drying drum provided in the dryer shown in FIG. 2 by cutting.
6 is a front view showing another part of the drying drum provided in the dryer shown in FIG. 2 by cutting.
7 is a side view showing a part of a drying drum provided in the dryer shown in FIG. 2.
8 shows a crusher of the dryer shown in FIG. 2.
9 is a side view for explaining the operation of the dry matter pulverizer provided in the dryer shown in FIG.
10 is a front view for explaining the operation of the dry matter pulverizer provided in the dryer shown in FIG.
11 is an excerpted view of a part of the configuration of the drying apparatus shown in FIG. 1.
12 is an excerpted view of the hot air supply device of the drying apparatus shown in FIG. 1.
13 is an excerpted view showing another partial configuration of the drying apparatus shown in FIG. 1.
14 and 15 show a modified example of the drying apparatus according to the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art may easily implement the present invention. The present invention may be implemented in various different forms and is not limited to the embodiments described herein.

In describing the present invention, the sizes or shapes of components shown in the drawings may be exaggerated or simplified for clarity and convenience of description.

In addition, terms specifically defined in consideration of the configuration and operation of the present invention may vary according to the intention or custom of users or operators. These terms should be interpreted as meanings and concepts consistent with the technical idea of the present invention based on the contents throughout the present specification.

In order to clearly describe the present invention, the description of parts not related to the technical idea of the present invention has been omitted, and the same reference numerals are assigned to the same or similar components throughout the specification.

In addition, in various embodiments, components having the same configuration will be described only in a representative embodiment by using the same reference numerals, and in other embodiments, only configurations different from the representative embodiment will be described.

Throughout the specification, when a part is said to be "connected" with another part, this includes not only the case of being "directly connected", but also being "indirectly connected" with another member therebetween. In addition, when a part "includes" a certain component, it may mean that other components are not excluded but other components are further included unless otherwise stated.

As shown in the drawing, the drying apparatus 100 according to an embodiment of the present invention includes a dryer 110, a raw material feeder 174 for introducing raw materials to the dryer 110, and a raw material to the dryer 110. Centrifugal separation of a hot air supply unit 182 supplying hot air for drying, a return conveyor 190 for returning the dry matter discharged from the dryer 110 to the raw material input unit 174, and air discharged from the dryer 110 The heat recovery dust collector 200 and the exhaust dust collector 204 for cooling, the dry matter cooler 210 for cooling the dry matter discharged from the dryer 110, and the control unit 230 for controlling the overall operation of the drying device 100 ). The drying apparatus 100 may crush and efficiently dry a raw material having a high moisture content while being transported along the rotating drum 111 of the dryer 110.

The drying apparatus 100 according to the present invention is mainly for drying organic wastes having a high moisture content such as food residues, food wastes, sludges, etc., but may be used for drying other objects other than the organic wastes. That is, the raw material as the object to be dried in the present invention is a concept including organic waste and various other objects to be dried having different properties from the organic waste.

The dryer 110 includes a rotary drum 111, a hot air supply duct 135 for rotatably supporting the rotary drum 111, a dry matter discharge duct 139 and an exhaust duct 149, and a rotary drum 111. A drum rotating device 153 providing rotational force, a crusher 158 for crushing raw materials input to the rotating drum 111, and a dry matter crusher 163 for secondary crushing dry matter dried in the rotating drum 111 And, it includes an extruder 168 for compressing the dry matter dried in the rotary drum 111.

The rotary drum 111 includes a drying drum 112, an extension drum 124, and a sorting drum 126. The rotating drum 111 may rotate by receiving a rotational force from the drum rotating device 153.

The drying drum 112 is provided with a drying chamber 113 into which raw materials are injected, and an inlet 114 and an outlet 115 connected to the drying chamber 113. The inlet 114 is provided at one end of the drying drum 112 for inflow of raw materials and hot air, and the outlet 115 is provided at the other end of the drying drum 112 for discharging the dried material from which the raw material has been dried. One end of the drying drum 112 is rotatably supported by the hot air supply duct 135.

A plurality of lifters 116 are provided on the inner circumferential surface of the drying drum 112 for pumping up the raw material injected into the drying chamber 113. When the drying drum 112 rotates, the plurality of lifters 116 pump up the raw material under the drying chamber 113 in the upper direction, and the raw material pumped by the lifter 116 moves from the top to the bottom of the drying chamber 113. Will fall. Accordingly, the raw material can be evenly distributed in the drying chamber 113, the area in contact with the hot air supplied to the drying chamber 113 is increased, and the area in contact with the hot air of the raw material is increased, thereby improving drying efficiency.

2 and 5, a partition 117 is installed on the inner circumferential surface of the drying drum 112. The partition 117 is disposed at the end of the section where the crusher 158 crushes the raw material. The partition 117 includes a plurality of partition plates 118 protruding from the inner circumferential surface of the drying drum 112. A plurality of partition plates 118 are disposed in the circumferential direction on the inner circumferential surface of the drying drum 112 to form a ring-shaped partition 117. A passage 120 through which raw materials can pass is provided in the center of the partition 117. The partition 117 protrudes from the inner circumferential surface of the drying drum 112 to delay the movement of the raw material moving from the drying chamber 113 toward the outlet 115. As the partition 117 delays the movement of the raw material, the residence time of the raw material in the drying chamber 113 is increased, so that drying of the raw material can be made more stably.

Each of the plurality of partition plates 118 is provided with a plurality of through holes 119. The through hole 119 may be formed in a size capable of passing only finely divided raw materials having a predetermined size or less. Therefore, among the raw materials located in the space between the inlet 114 and the partition 117 of the drying chamber 113, the raw material larger than the size of the through-hole 119 stays in the space between the inlet 114 and the partition 117 for a longer time. It can be crushed by the crusher 158.

In addition to the illustrated structure, the partition 117 is installed to protrude from the inner circumferential surface of the drying drum 112 and may be changed to various other structures capable of delaying the movement of raw materials.

A plurality of rotation guides 121 and a heat insulating material 122 are installed on the outer circumferential surface of the drying drum 112. The rotation guide 121 is formed in a ring shape surrounding the outer circumferential surface of the drying drum 112 and is rotatably supported by a support roller 133 that is rotatably installed outside the rotating drum 111. The insulating material 122 serves to insulate the drying drum 112 by covering the outer peripheral surface of the drying drum 112.

The extension drum 124 is connected to the other end of the drying drum 112 and is rotatably supported by the dry matter discharge duct 139.

The sorting drum 126 is connected to the other end of the drying drum 112 so as to be located inside the extension drum 124. The sorting drum 126 is connected to the outlet 115 of the drying drum 112. The raw material discharged through the outlet 115 flows into the sorting drum 126. The sorting drum 126 is provided with a plurality of discharge holes 127. The plurality of discharge holes 127 penetrate through the sorting drum 126 and are evenly disposed on the inner and outer circumferential surfaces of the sorting drum 126. The discharge hole 127 is made of a size capable of passing only dry matter less than a preset size.

For example, the discharge hole 127 may be formed to have a diameter of 10 mm. Recently, dry raw materials supplied as auxiliary fuels to thermal power plants are regulated to have a particle size of 10 mm or less. When the diameter of the discharge hole 127 is 10 mm, only dry matter having a particle size of 10 mm or less suitable as an auxiliary fuel for a thermal power plant can be selected and discharged. Therefore, since there is no need to install a separate separator as in the prior art, it is possible to reduce additional cost and reduce installation space.

A plurality of waste heat recovery pipes 129 are coupled to the rotating drum 111. 2 to 4 and 6, a plurality of waste heat recovery pipes 129 are installed to be adjacent to the inner circumferential surface of the drying drum 112 and are spaced apart in the circumferential direction of the drying drum 112. An inlet 130 is provided at one end of the waste heat recovery pipe 129, and an outlet 131 is provided at the other end of the waste heat recovery pipe 129. The inlet 130 of the waste heat recovery pipe 129 is connected to the inside of the dry matter discharge duct 139, and the outlet 131 of the waste heat recovery pipe 129 is connected to the inside of the exhaust duct 149. The waste heat recovery pipe 129 may flow exhaust gas discharged from the rotating drum 111 to the dry matter discharge duct 139 to the exhaust duct 149.

As the high-temperature exhaust gas flows into the waste heat recovery pipe 129, the surface temperature of the waste heat recovery pipe 129 may be maintained at a high temperature. Therefore, in a process in which the rotating drum 111 rotates and the raw material inside the rotating drum 111 is stirred, the raw material may contact the surface of the high-temperature waste heat recovery pipe 129 to promote drying. In addition, the waste heat recovery pipe 129 may crush the raw material by hitting the raw material while rotating together with the rotating drum 111, and thus drying of the raw material may be further promoted.

The shape of the waste heat recovery pipe 129, the number of installations, and the arrangement structure are not limited to those shown and may be variously changed.

The rotating drum 111 is rotatably supported on the fixedly installed hot air supply duct 135, the dry matter discharge duct 139 and the exhaust duct 149. The hot air supply duct 135 rotatably supports one end of the rotating drum 111, and the dry matter discharge duct 139 rotatably supports the other end of the rotating drum 111. The exhaust duct 149 rotatably supports an intermediate portion adjacent to one end of the rotating drum 111. The exhaust duct 149 is disposed adjacent to the hot air supply duct 135. The rotary drum 111 is inclined so that the other end provided with the outlet 115 is positioned lower than the one end provided with the inlet 114, and the hot air supply duct 135, the dry matter discharge duct 139, and the exhaust duct 149 Can be supported by If the outlet 115 side of the rotary drum 111 is lower than the inlet 114 side, the raw material injected into the drying chamber 113 can be more smoothly transferred toward the outlet 115.

The hot air supply duct 135 serves to guide the hot air generated from the hot air supply 182 to the drying chamber 113 while rotatably supporting the rotating drum 111. That is, the hot air supply duct 135 connects the rotating drum 111 and the hot air supply 182 to introduce the hot air supplied from the hot air supply 182 into the drying chamber 113. The hot air supply duct 135 is provided with a hot air supply duct discharge unit 136. The hot air supply duct discharge unit 136 discharges the raw material falling into the inside of the hot air supply duct 135 to the return conveyor 190. As shown, a discharge control valve 137 controlled by the control unit 230 may be installed in the hot air supply duct discharge unit 136. When raw materials are introduced into the hot air supply duct 135, the control unit 230 opens the discharge control valve 137 so that the raw materials of the hot air supply duct 135 can be discharged to the return conveyor 190. The discharge control valve 137 may take a structure that is manually operated.

The crusher 158 and the raw material feeder 174 may pass through the hot air supply duct 135 to reach the inside of the rotary drum 111. The coupling between the hot air supply duct 135 and the rotating drum 111, the coupling between the hot air supply duct 135 and the crusher 158, and the coupling between the hot air supply duct 135 and the raw material feeder 174 The portion may be sealed by a sealing member or the like.

The dry matter discharge duct 139 rotatably supports the other end of the rotating drum 111. The dry matter discharged from the outlet 115 of the drying drum 112 flows into the dry matter discharge duct 139 through the sorting drum 126. Some of the exhaust gas discharged from the rotary drum 111 to the dry matter discharge duct 139 along with the dry matter flows to the exhaust duct 149 through a plurality of waste heat recovery pipes 129, and another part is an exhaust dust collector ( 204). The dry matter discharge duct 139 has a dry matter discharge part 140 for discharging the dry matter to the outside. The dry matter discharge unit 140 includes a normal discharge unit 141, a return discharge unit 144, and a discharge switching member 147.

The normal discharge unit 141 discharges the dried material to be dried to the dry material cooler 210. Drying is normally performed while passing through the rotary drum 111 so that the dry matter that does not require any further drying process may be discharged through the normal discharge unit 141. A discharge control valve 142 for controlling the discharge of dry matter through the normal discharge part 141 is installed in the normal discharge part 141. The discharge control valve 142 may be controlled by the control unit 230 or may be manually operated.

The return and discharge unit 144 discharges the dry matter requiring redrying to the return conveyor 190. Dry matter that is not normally dried while passing through the rotary drum 111 and requires an additional drying process may be discharged through the return and discharge unit 144. The return and discharge unit 144 is provided with a discharge control valve 145 for controlling the discharge of the dry matter through the return and discharge unit 144. The discharge control valve 145 may be controlled by the control unit 230 or may be manually operated.

The discharge switching member 147 switches the discharge direction of the dry matter to the normal discharge part 141 or the return discharge part 144. The discharge switching member 147 may be automatically controlled by the control unit 230 or may be manually operated.

A camera 192, a lighting device 194, and an infrared camera 196 may be installed in the building discharge duct 139.

The lighting device 194 may illuminate the inside of the dry matter discharge duct 139 and the dry matter discharged from the rotating drum 111.

The camera 192 may photograph the inside of the dry matter discharge duct 139 and the dry matter discharged from the rotating drum 111. The image captured by the camera 192 may be provided to a management room or an administrator. The administrator can check the state or discharge amount of the building discharged from the rotating drum 111 through the image captured by the camera 192. The manager may adjust the operating conditions of the drying apparatus 100, such as adjusting the amount of raw material input or the amount of hot air supplied according to the condition of the dried product.

The infrared camera 196 may take an infrared image of the dried material flowing into the dry material discharge duct 139. Through the infrared camera 196, it is possible to check the drying state such as the temperature or moisture content of the dry matter discharged from the rotating drum 111. The manager may adjust the operating conditions of the drying apparatus 100, such as adjusting the input amount of raw materials or adjusting the supply amount of hot air according to the drying state of the dried material. In addition, the control unit 230 may automatically adjust the operating conditions of the drying apparatus 100 according to the temperature or moisture content of the dry matter detected by the infrared camera 196. In addition, the control unit 230 controls the discharge switching member 147 according to the moisture content of the dry matter detected by the infrared camera 196 to switch the discharge direction of the dry matter to the normal discharge unit 141 or the return discharge unit 144 I can make it.

Various other methods other than the method of using the infrared camera 196 may be used as a method of detecting the moisture content of the dry matter discharged from the rotating drum 111.

The dry matter crusher 163 and the extruder 168 may pass through the dry matter discharge duct 139 and reach the inside of the rotary drum 111. A coupling part between the dry matter discharge duct 139 and the rotary drum 111, a coupling part between the dry matter discharge duct 139 and the dry matter grinder 163, and between the dry matter discharge duct 139 and the extruder 168 The coupling portion of may be sealed by a sealing member or the like.

The exhaust duct 149 is disposed to be located closer to the hot air supply duct 135 among the hot air supply duct 135 and the dry matter discharge duct 139 to rotatably support the rotating drum 111. The exhaust duct 149 is connected to a plurality of waste heat recovery pipes 129. That is, the outlet 131 of each of the plurality of waste heat recovery pipes 129 is connected to the inner space of the exhaust duct 149. Accordingly, exhaust gas flowing along the plurality of waste heat recovery pipes 129 may be introduced into the exhaust duct 149. Exhaust gas flowing into the exhaust duct 149 may be supplied to the hot air supply 182 through the dust collector 200 for heat recovery. The coupling portion between the exhaust duct 149 and the rotating drum 111 may be sealed by a sealing member or the like.

The exhaust duct 149 is provided with an exhaust duct discharge unit 150. The exhaust duct discharge unit 150 discharges the raw material falling into the exhaust duct 149 to the return conveyor 190. The exhaust control valve 151 controlled by the control unit 230 may be installed in the exhaust duct discharge unit 150. When the raw material flows into the exhaust duct 149, the control unit 230 opens the discharge control valve 151 so that the raw material of the exhaust duct 149 can be discharged to the return conveyor 190. The discharge control valve 151 may take a structure that is manually operated.

6 and 7, the drum rotating device 153 includes a ring gear 154 coupled to the outer circumferential surface of the drying drum 112, a driving gear 155 meshed with the ring gear 154, and a driving gear. It includes a driver 156 to rotate 155. When the driving gear 155 is rotated by the driver 156, the ring gear 154 meshed with the driving gear 155 rotates, thereby causing the drying drum 112 to rotate. In the present invention, the structure of the drum rotating device 153 is not limited to that shown, and may be changed to various other structures capable of rotating the rotating drum 111.

2, 3, and 8, the crusher 158 may be partially located in the drying chamber 113 to crush the raw material flowing into the drying chamber 113. The crusher 158 includes a plurality of blades 159 disposed in the drying chamber 113, a shaft 160 supporting the plurality of blades 159, and a driver 161 providing rotational force to the shaft 160 do. As shown, the blades 159 may be concentrated in the area between the inlet 114 and the partition 117 in the drying chamber 113. The driver 161 is installed outside the rotating drum 111. The crusher 158 may crush the raw material in the drying chamber 113 by rotating the plurality of blades 159 at high speed.

A space through which cooling air is introduced is provided inside the shaft 160. Cooling air supplied from the cooling air supply 162 is introduced into the space inside the shaft 160 to cool the shaft 160. The shaft 160, which is located in the high-temperature drying chamber 113 and rotates, may undergo bending deformation due to high heat. In particular, when the dryer 110 is stopped, if the shaft 160 of the crusher 158 is not rotated until the shaft 160 is sufficiently cooled, the heated shaft 160 is liable to bend and deform. This problem can be solved by supplying cooling air to the shaft 160 with the cooling air supply 162. That is, when cooling air is supplied to the shaft 160 using the cooling air supply 162, the shaft 160 can be maintained at a certain temperature or lower, thereby preventing the bending deformation of the shaft 160, and the shaft 160 Can be kept in an optimal state. The shaft 160 may be connected to the cooling air supply 162 through a rotary joint. The cooling air supply 162 may supply cooling air to the rotating shaft 160 through the rotary joint.

The crusher 158 may be changed to various other structures capable of crushing the raw material of the drying chamber 113 in addition to the illustrated structure.

2 and 4, the dry matter crusher 163 may be disposed at the outlet 115 side of the rotary drum 111 to crush the dried dry matter while passing through the drying drum 112. The construction pulverizer 163 includes a plurality of blades 164 disposed inside the rotating drum 111, a shaft 165 supporting the plurality of blades 164, and a drive that provides rotational force to the shaft 165 ( 166). The driver 166 is installed outside the rotating drum 111. The dry matter crusher 163 may crush the dry matter moving toward the sorting drum 126 by rotating the plurality of blades 164 at high speed. The dry matter crusher 163 may be changed to various other structures capable of crushing dry matter in addition to the illustrated structure.

2, 4, 9, and 10, the extruder 168 compresses the dry matter flowing into the sorting drum 126 to the inner circumferential surface of the sorting drum 126. The extruder 168 includes a pressing roller 169, a shaft 171 supporting the pressing roller 169, and a driver 172 providing rotational force to the shaft 171.

The pressing roller 169 is located inside the sorting drum 126 and the driver 172 is installed outside the rotating drum 111. The diameter of the pressing roller 169 is smaller than the diameter of the sorting drum 126. The pressing roller 169 and the shaft 171 rotate around a rotation center axis parallel to the rotation center axis of the rotation drum 111. The rotation center axis of the compression roller 169 is located eccentric from the rotation center axis of the rotation drum 111, and the rotation direction of the compression roller 169 is the same as the rotation direction of the rotation drum 111.

A plurality of pressing protrusions 170 corresponding to the discharge holes 127 of the sorting drum 126 are protruded on the outer circumferential surface of the pressing roller 169. The plurality of pressing protrusions 170 are spaced apart from each other at the same interval as the interval between the discharge holes 127. The pressing protrusion 170 may be inserted into the discharge hole 127 while pressing the dry matter inside the sorting drum 126. The pressing roller 169 is installed inside the sorting drum 126 so that its outer circumferential surface is in contact with or adjacent to the inner circumferential surface of the sorting drum 126 and rotates to pressurize the dried material toward the discharge hole 127.

By the action of the extruder 168, the dry matter flowing into the sorting drum 126 is crushed to a size corresponding to the discharge hole 127, and is smoothly discharged to the outside of the sorting drum 126 through the discharge hole 127. Can be. In addition, as the pressing protrusion 170 is inserted into the discharge hole 127, the pressing roller 169 rotates, thereby reducing the problem of clogging the discharge hole 127.

In addition to the illustrated structure, the extruder 168 may be changed to various other structures that are installed inside the sorting drum 126 to pressurize the dry matter flowing into the sorting drum 126 toward the discharge hole 127. .

1 and 11, the raw material feeder 174 feeds the raw material into the drying chamber 113 through the inlet 114 of the rotating drum 111. The raw material feeder 174 receives raw material through the metering feeder 176. The metering feeder 176 measures the weight of the raw material and supplies the raw material to the raw material feeder 174 by a predetermined weight. The raw material discharged from the extruder 178 is supplied to the metering feeder 176. The extruder 178 extrudes the raw material input to the input hopper 180 and supplies it to the metering feeder 176.

The method of introducing the raw material into the rotating drum 111 includes various other methods other than the method of using the raw material feeder 174, the metering feeder 176, the extruder 178, and the input hopper 180 as shown. Can be used.

1 and 11, the hot air supply unit 182 includes a deodorization furnace 183 in which hot air is created, a blower 187 for blowing air into the deodorization furnace 183, and an outdoor air blower 187 It includes an outdoor air inhaler 188 supplied to. The blower 187 appropriately mixes the outdoor air supplied from the outdoor air inhaler 188 and the exhaust gas recovered through the heat recovery dust collector 200 and supplies it to the deodorization furnace 183. A combustion chamber 184 is provided inside the deodorization furnace 183. A burner (not shown) that generates a flame is installed inside the deodorization furnace 183. A perforated plate 185 having a plurality of through holes 186 is disposed in the middle of the combustion chamber 184. The perforated plate 185 generates turbulence in the combustion chamber 184 to induce complete combustion of fuel gas and malodorous substances supplied to the combustion chamber 184. The hot air supply 182 may produce hot air in the deodorization furnace 183 and supply it to the inside of the rotating drum 111.

Referring to FIG. 1, the return conveyor 190 returns the dry matter discharged through the return discharge unit 144 of the dry matter discharge duct 139 to the raw material feeder 174. Among the dry matters that have passed through the rotary drum 111, dry matters requiring an additional drying process, such as dry matters having a high moisture content, may be re-introduced into the rotary drum 111 through the return conveyor 190. In addition, the raw material flowing into the hot air supply duct 135 or the raw material flowing into the exhaust duct 149 may be returned to the raw material injector 174 through the return conveyor 190 and introduced into the rotary drum 111.

1 and 12, the heat recovery dust collector 200 is installed to be connected to the exhaust duct 149 to centrifuge the exhaust gas discharged from the exhaust duct 149. The foreign matter filtered by the heat recovery dust collector 200 is introduced into the raw material feeder 174 and re-introduced into the rotating drum 111, and the exhaust gas from which the foreign matter has been removed is the hot air supply unit 182 through the connection pipe 201 It is supplied to the blower 187 of. The connection pipe 201 is provided with a flow control valve 202 for adjusting the amount of exhaust gas supplied to the hot air supply 182.

In the exhaust gas produced by drying of the raw material in the dryer 110, various compounds generated by combustion of the fuel, dust generated from the raw material and moisture evaporated from the raw material are mixed in the form of steam. Conventionally, it has been common to discharge exhaust gas generated in the process of drying raw materials to recover a certain amount of waste heat from a heat exchanger, remove dust and water vapor from a dust collector, etc., and then discharge them to the atmosphere.

The drying apparatus 100 according to an embodiment of the present invention recovers a considerable amount of hot exhaust gas produced in the process of drying raw materials and sends it to the deodorization furnace 183 to burn the odorous substance at high temperature to deodorize it, and reheat the exhaust gas. Can be reused as a drying heat source by being introduced into the dryer 110 again. Therefore, it is possible to increase drying efficiency and reduce energy consumption.

1 and 13, the exhaust dust collector 204 is installed to be connected to the dry matter discharge duct 139 to centrifuge the exhaust gas discharged from the dry matter discharge duct 139. The foreign matter filtered by the exhaust dust collector 204 is introduced into the dry matter cooler 210, and the exhaust gas from which the foreign matter has been removed is sent to an air filtration facility (not shown) to be discharged into the atmosphere after undergoing treatment processes such as dust collection and deodorization. I can. The connection pipe 205 connecting the dry matter discharge duct 139 and the exhaust dust collector 204 includes a flow control valve 206 for controlling the flow rate and a pressure for measuring the pressure of the exhaust gas passing through the connection pipe 205. A sensor 207 is installed. The flow control valve 206 is automatically controlled according to the detection signal of the pressure sensor 207 to control the flow rate of the exhaust gas flowing from the dry matter discharge duct 139 to the exhaust dust collector 204.

The dry matter cooler 210 cools the dry matter discharged from the dry matter discharge duct 139. Since the dry matter is discharged from the dry matter discharge duct 139 in a high temperature state, a cooling process is required for packaging or transportation. The dry matter cooler 210 includes a cooling housing 211, a transfer conveyor 219, and a cooling medium supply 221.

A cooling chamber 212 is provided inside the cooling housing 211. In addition, in the cooling housing 211, a dry matter inlet 213 for inputting dry matter, an auxiliary inlet 215 for inputting foreign matter discharged from the exhaust dust collector 204, and a dry matter outlet for discharging the cooled dry matter 214, a cooling medium supply unit 216 for introducing the cooling medium, and a cooling medium discharge unit 217 for discharging the cooling medium are provided. The dry matter inlet 213 and the dry matter outlet 214 are disposed adjacent to both ends of the cooling housing 211, respectively, and the cooling medium supply unit 216 and the cooling medium discharge unit 217 are also at both ends of the cooling housing 211 Are placed adjacent to each other.

The transfer conveyor 219 is installed in the cooling chamber 212 and transfers dry matter input to the dry matter input port 213 and foreign matter input to the auxiliary input port 215 to the dry matter discharge port 214. The dry matter flowing into the cooling chamber 212 may be cooled by cooling air of the cooling medium supplied from the cooling medium supply unit 221 while being transported by the transfer conveyor 219. As the transfer conveyor 219, a conveyor of various structures, such as a conveyor as shown, may be used.

The cooling medium supply unit 221 supplies a cooling medium for cooling the dried product to the cooling housing 211. The cooling medium supplied from the cooling medium supply unit 221 may be introduced into a water jacket (not shown) provided in the cooling housing 211 through the cooling medium supply unit 216. In addition, the cooling medium whose temperature has risen while cooling the dry matter flowing into the cooling chamber 212 can be recovered to the cooling medium supply unit 221 through the cooling medium discharge unit 217, cooled, and then supplied to the cooling housing 211 again. have. The flow structure of the cooling medium in the cooling housing 211 may be designed in various structures in consideration of the transport direction of the dry matter and the cooling efficiency of the dry matter.

The dry matter cooled in the dry matter cooler 210 may be discharged to the discharge conveyor 224 and transferred to the dry matter molding machine 226 and the dry matter packaging machine 228 through the discharge conveyor 224. The dry matter molding machine 226 may mold the dry matter into an easy-to-use form, and the dry matter packaging machine 228 may easily package the molded product made in the dry matter molder 226 to be transported.

The controller 230 controls the overall operation of the drying apparatus 100 so that processes such as input of raw materials, drying of raw materials, and cooling of raw materials can be performed continuously and organically.

As described above, the drying apparatus 100 according to an embodiment of the present invention collects a certain amount of hot exhaust gas that is discarded after passing through the dryer 110 and sends it to the deodorization furnace 183 to burn odorous substances at high temperature. The deodorized and heated exhaust gas may be introduced into the dryer 110 again and used as a heat source for the dryer. Therefore, waste energy can be reused and fuel costs can be significantly reduced.

In addition, the drying apparatus 100 according to an embodiment of the present invention may recover a part of exhaust gas including water vapor having high latent heat of evaporation discharged from the dryer 110 and reuse it as a drying heat source. Among the reused exhaust gases, water vapor contains a considerable amount of evaporation heat (for example, 539 kcal/kg). When the exhaust gas is recovered by the deodorization furnace 183 and heated, superheated steam is produced. This superheated steam penetrates the raw material faster than dry air at the same temperature and is more effective in raising the sensible heat of the raw material. In addition, the superheated steam supplied to the dryer 110 has a high latent heat of evaporation, so that the drying speed of the raw material can be further accelerated.

In addition, the drying apparatus 100 according to an embodiment of the present invention can reduce the amount of exhaust gas discharged to the outside as much as the exhaust gas discharged from the dryer 110 is reused, thereby significantly reducing the odor treatment capacity. . Accordingly, it is possible to reduce the cost of post-treatment of exhaust gas and reduce the amount of substances emitted to the atmosphere.

On the other hand, Figures 14 and 15 show a modified example of the drying apparatus according to the present invention.

In the modified example shown in FIGS. 14 and 15, a plurality of stay control plates 240 are installed inside the drying drum 112. The plurality of stay control plates 240 are coupled to the partition 117 so that the protruding height from the inner circumferential surface of the drying drum 112 can be adjusted. The stay control plate 240 may be installed to be height adjustable in various ways. For example, a method of fixing a nut portion to the drying drum 112 and installing an adjustment bolt screwed to the nut portion through the drying drum 112 to be coupled to the retention control plate 240 may be used. In this case, by turning the adjustment bolt, the height of the stay adjustment plate 240 can be adjusted.

In addition, the stay control plate 240 may be manually height adjusted by a user or may take a structure in which the height is automatically adjusted. When the stay control plate 240 has a structure in which the height is automatically adjusted, a device for adjusting the height of the stay control plate 240 may be installed outside the drying drum 112, and the stay control plate ( 240) height can be adjusted. In addition, the stay control plate 240 may take a structure capable of adjusting the height without being coupled to the partition 117.

The stay control plate 240 may be height adjusted according to the moisture content of the raw material flowing into the drying chamber 113. For example, when the moisture content of the raw material flowing into the drying chamber 113 is general, the height of the retention control plate 240 protruding from the inner circumferential surface of the drying drum 112 may be adjusted to a minimum. At this time, the protruding height of the stay control plate 240 may be adjusted to be lower than the protruding height of the partition 117. When the protrusion height of the stay control plate 240 is adjusted to be lower than the protrusion height of the partition 117, the stay control plate 240 does not affect the movement of the raw material in the drying chamber 113.

On the other hand, when the moisture content of the raw material flowing into the drying chamber 113 is high, as shown in FIG. 14, the height of the protrusion of the stay control plate 240 can be adjusted to the maximum. In this case, since the size of the passage surrounded by the plurality of retention control plates 240 is narrowed, the moving speed of the raw material is slowed and the residence time of the raw material in the drying chamber 113 is increased. Therefore, it is possible to secure a drying time in which a material having a high moisture content can be sufficiently dried.

In the drawing, it is shown that a plurality of stay control plates 240 made of an arch shape are arranged to form a ring shape corresponding to the partition 117, but the shape, number, and installation interval of the stay control plate 240 are variously changed. Can be.

Until now, the present invention has been shown and described in connection with a preferred embodiment for illustrating the principle of the present invention, but the present invention is not limited to the configuration and operation as illustrated and described as such, and the appended claims It will be well understood by those of ordinary skill in the art that a number of changes and modifications to the present invention can be made without departing from the spirit and scope of the present invention.

100: drying device 110: dryer
111: rotary drum 112: drying drum
113: drying room 116: lifter
117: partition 124: extension drum
126: sorting drum 129: waste heat recovery pipe
135: hot air supply duct 139: dry matter discharge duct
140: dry matter discharge unit 141: normal discharge unit
144: return discharge unit 147: discharge switching member
149: exhaust duct 153: drum rotating device
158: crusher 163: dry matter crusher
168: extruder 169: pressing roller
174: raw material feeder 176: metering feeder
178: extruder 180: input hopper
182: hot air supply 183: deodorization furnace
187: blower 188: outside air inhaler
190: return conveyor 200: dust collector for heat recovery
204: dust collector for exhaust 210: dry matter cooler
211: cooling housing 219: transfer conveyor
221: cooling medium feeder 224: discharge conveyor
226: dry matter molding machine 228: dry matter packaging machine
230: control unit 240: stay control plate

Claims (18)

A rotating drum having a drying chamber for drying raw materials and a drying drum having an inlet and an outlet provided at one end and the other end to be connected to the drying chamber, and rotates by receiving rotational force from the drum rotating device;
A raw material feeder for introducing raw materials into the drying chamber through the inlet;
A crusher having a plurality of blades disposed in the drying chamber and rotating to crush the raw material in the drying chamber;
A hot air supply unit having a deodorization furnace having a combustion chamber therein, a blower for blowing air into the deodorization furnace, and generating hot air for supplying the drying chamber;
A hot air supply duct for rotatably supporting one end of the rotary drum and connecting the rotary drum and the hot air supply to introduce hot air supplied from the hot air supply to the drying chamber;
A dry matter discharge duct rotatably supporting the other end of the rotary drum, connected to the outlet, and having a dry matter discharge part for discharging the dry matter discharged from the outlet to the outside;
An exhaust duct installed to surround the drying drum;
It is coupled to the rotating drum so as to rotate with the rotating drum, an inlet is provided at one end to be connected to the inside of the dry matter discharge duct, and an outlet port connected to the inside of the exhaust duct is provided at the other end of the rotary drum. A waste heat recovery pipe for flowing exhaust gas flowing into the exhaust duct to the exhaust duct; And
And a heat recovery dust collector connected to the exhaust duct so as to remove foreign substances by centrifuging the exhaust gas of the exhaust duct and supplying the exhaust gas from which the foreign substances have been removed to the hot air supply, and
The hot air supply is a drying apparatus, characterized in that the mixing of the outdoor air and the exhaust gas supplied from the heat recovery dust collector, heating the mixture and then supplying it to the drying chamber.
The method of claim 1,
The rotary drum is a drying apparatus, characterized in that inclined so that the outlet is positioned lower than the inlet.
The method of claim 1,
The waste heat recovery pipe is installed so as to be adjacent to the inner circumferential surface of the drying drum, wherein a plurality of the waste heat recovery pipes are spaced apart in the circumferential direction of the drying drum.
The method of claim 1,
The rotating drum,
And a sorting drum disposed at the other end of the drying drum to be connected to the outlet, and having a plurality of discharge holes through which only dry matters of a predetermined size or less can pass.
The method of claim 4,
A pressing roller installed inside the rotating drum so as to be parallel to the rotating central axis of the rotating drum and rotated around the rotating central axis of the rotating drum, and compressing the dry matter of the sorting drum; And
Drying apparatus comprising a; drive for providing a rotational force to the pressing roller.
The method of claim 5,
The drying apparatus, characterized in that the pressing roller has a plurality of pressing protrusions that can be inserted into the discharge hole.
The method of claim 4,
And a dry matter crusher having a plurality of blades disposed inside the sorting drum and rotating to crush the dry matter inside the sorting drum.
The method of claim 1,
And a return conveyor for returning the dry matter that needs to be re-dried among the dry matter discharged from the dry matter discharge unit to the raw material feeder.
The method of claim 8,
The dry matter discharge unit,
A normal discharge unit for discharging the dried material, and
A return and discharge unit for discharging the dried material requiring redrying to the return conveyor,
And a discharge switching member for switching the discharge direction of the dry matter to the normal discharge part or the return discharge part.
The method of claim 1,
A cooling housing including a cooling chamber, a dry matter inlet port for introducing the dry matter discharged from the dry matter discharge unit into the cooling chamber, and a dry matter outlet for discharging the dry matter cooled in the cooling chamber;
A transfer conveyor installed in the cooling chamber to transfer the dry matter input to the dry matter inlet to the dry matter outlet; And
And a cooling medium feeder for supplying a cooling medium to the cooling housing.
The method of claim 1,
And an exhaust dust collector connected to the dry matter discharge duct so as to remove foreign substances by centrifuging the exhaust gas discharged from the dry matter discharge duct.
The method of claim 1,
And a partition coupled to the inner circumferential surface of the drying drum to delay the movement of the raw material moving from the drying chamber to the outlet.
The method of claim 12,
The partition includes a plurality of partition plates protruding from the inner peripheral surface of the drying drum,
The plurality of partition plates are drying apparatus, characterized in that arranged in the circumferential direction on the inner peripheral surface of the drying drum.
The method of claim 12,
Drying apparatus, characterized in that the partition is provided with a plurality of through-holes through which only raw materials of a predetermined size or less can pass.
The method of claim 12,
And a stay control plate coupled to the partition so that the height of the protrusion from the inner circumferential surface of the drying drum can be adjusted.
The method of claim 1,
The drying apparatus, characterized in that the foreign matter filtered by the dust collector is re-introduced into the drying drum through the raw material feeder.
The method of claim 1,
A metering feeder that measures the weight of raw materials and supplies them to the raw material feeder; And
A drying apparatus comprising: an extruder for extruding raw materials and supplying them to the metering feeder.
The method of claim 1,
The crusher includes a shaft supporting the plurality of blades and having a space therein,
And a cooling air supply unit configured to cool the shaft by supplying cooling air into the shaft.

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