JP4349581B2 - Fluid dryer - Google Patents

Description

  The present invention continuously feeds the material to be dried to the dry material transporter that conveys the material to be dried, which is composed of a gas ejection surface having a bottom surface with a small hole opening, with a concave groove configuration extending from end to end in the horizontal direction. Then, the object to be dried is irradiated with far-infrared rays, and the object to be dried is air-flowed. The present invention relates to a drying apparatus.

  Conventionally, a fluidized plate having a flat shape is laid in the dryer body, a fluid chamber is formed in the upper portion, a blower chamber is formed in the lower portion, and a large number of air holes for blowing dry air are opened on the surface of the fluidized plate, A fluid drier is known which terminates drying while moving to the discharge side while forming a fluidized bed having a certain thickness with dry air that blows dry matter supplied onto the fluidized plate all at once from the nozzle holes.

  In addition, a large amount of far-infrared rays are radiated into the dryer chamber while keeping the air in the drying chamber in a decompressed state, and a large amount of air in the drying chamber is circulated on the air-permeable conveying device disposed in the drying chamber. Japanese Patent Application Laid-Open No. 11-172997 discloses a method in which the soot is transported in a layered state in a dispersed state, and the soot and the circulating air flow are sufficiently brought into contact with each other by passing the circulating air flow upward from below the soot layer. It is described in.

Further, by JP 2002-22362 publication, the grain support surface of the grain holding member provided in the horizontal direction of the drying chamber portion formed of a number of gas ejection surface pores open, weir on one of the gas ejecting surface Supporting the grain holder while supplying a grain from the other upstream side to form a grain layer and disposing a far infrared heater above this grain layer to radiate far infrared rays to the grain A structure in which the grain is dried while adjusting the thickness of the grain according to the height of the weir member on the gas ejection surface while allowing the gas to penetrate from the gas ejection surface having a small hole on the surface and stirring and fluidizing is already known. It is. Japanese Patent Laid-Open No. 2001-50665 introduced the provision of a mountain-shaped cover on the top of the far-infrared radiator as a means for preventing dust from adhering and accumulating on the surface of the far-infrared radiator in the grain dryer. ing.

JP-A-11-172997 JP 2002-22362 A JP 2001-50665 A

  In a fluidized dryer that dries while drying air on the gas jetting surface with a small opening at the bottom from the bottom toward the top, the drying air is in contact with the material to be dried. Dust containing a large amount of fine particles from dry matter rides on the dry wind and is released outside the machine.

  Currently, in many fluidized dryers, the fine particles discharged from the material to be dried on the drying air are discharged out of the machine as they are, or are collected by a dust collector that has the ability to process the air volume equivalent to the drying air. The installation area of the dust collector, the operating power, the noise during operation, the cost of the equipment, the maintenance of the dust collector, etc. are problems.

  Further, in the fluidized drying apparatus that circulates the drying air and passes it through the material to be dried, there is provided a device that prevents the dust containing the fine particles contained in the material to be dried from circulating around the drying air. As a result, dust containing fine particles in the plane adheres to the surface of the far-infrared radiator, which becomes hot, and burns to hinder far-infrared radiation, and there is a risk of fire. In addition, as disclosed in Japanese Patent Laid-Open No. 2001-50665, in the case where the upper part of the far-infrared radiator is provided with a mountain-shaped cover, it is possible to prevent dust from floating on the surface of the far-infrared radiator. Have difficulty.

Accordingly, the present invention is aerated from the bottom to the top of the material to be dried, and it is possible to uniformly Moreover speed rather drying object to be dried as a fluidized state far-infrared rays by irradiating the material to be dried, far infrared By spraying high-pressure air onto the surface of the radiator, a fluidized drying device that can prevent dust containing fine particles scattered from the material to be dried in the dryer from being burned onto the surface of the far-infrared radiator or causing a fire. The purpose is to provide.

In order to achieve the above object, the present invention proposes a fluidized drying apparatus according to claims 1 to 4 .

That is, the fluidized-drying apparatus according to claim 1 is a dried product transporter configured to convey a material to be dried having a gas ejection surface with a bottom surface having a small hole in a concave groove configuration across the end in the horizontal direction. a supply device for continuously introducing the material to be dried onto the dried product carrier at the start side of the dried product carrier, and a far-infrared radiator which irradiates far infrared rays to the material to be dried on top of the dried product carrier Equipped with a blower to vent the dry matter from the gas ejection surface of the dry matter transport body, and the dry matter is subjected to ventilation and floats and repeats settling while the dry matter on the surface layer from the side overflow outlet on the end of the dry matter transport body Is a fluidized drying apparatus that sequentially overflows , and is provided with a high-pressure air injection duct that injects high-pressure air onto the surface of the far-infrared radiator and blows away dust, in the vicinity of the far-infrared radiator, , Facing along the circumferential direction of the far-infrared radiator It has a surface, and characterized in that it has a high pressure air injection ports of plural rows consisting of a large number of small holes in its opposite surfaces along the distal longitudinal direction of the infrared radiator narrow slot or rows Is.

The fluidized drying apparatus according to claim 2 is a dried product transporting body that conveys while drying a material to be dried, which is composed of a gas ejection surface having a small hole opening at the bottom surface, with a concave groove configuration extending horizontally across the end. comprising a feed device for continuously introducing the material to be dried onto the dried product carrier at the start side of the object carrier, and a far-infrared radiator which irradiates far infrared rays to the material to be dried on top of the dried product carrier, The air is blown from the gas ejection surface of the dried product carrier to the material to be dried by the blower, and the material to be dried is successively floated and floated, and the dried material on the surface layer is sequentially transferred from the lateral overflow at the end of the dried product carrier. A fluidized drying apparatus overflowing laterally, wherein a high-pressure air injection duct that injects high-pressure air onto the surface of the far-infrared radiator and blows away dust is provided in the vicinity of the far-infrared radiator , Narrow holes or long holes along the longitudinal direction of the infrared radiator Characterized in that it is opposed repositionable constructed of high pressure air injection ports in the circumferential direction with respect to a high-pressure air injection port consisting of rows of a large number of small holes, and the far-infrared radiator is there.

The fluidized drying apparatus according to claim 3 is the fluidized drying apparatus according to claim 1 or 2, wherein warm air is supplied to the far-infrared radiator by supplying warm air to the high-pressure air jet duct from the warm air generating space in the fluidized drying apparatus. It is characterized by injecting.

Fluidized drying apparatus according to claim 4, in a fluidized drying apparatus according to claim 1, 2 or 3, the timing for injecting high-pressure air to the surface of the far-infrared radiator during drying and at the end drying started and when dry It is characterized by being performed at regular time intervals or at any time.

In accordance with the present invention, it is possible to uniformly Moreover rather fast drying as fluidized state material to be dried by irradiating vented upward from below the material to be dried and the far infrared to the material to be dried, far infrared By injecting high-pressure air onto the surface of the radiator, dust containing fine particles scattered from an object to be dried in the dryer can be prevented from being burned onto the surface of the far-infrared radiator or the occurrence of a fire.

  1 and 2, reference numeral 1 denotes a fluidized drying apparatus. The fluidized drying apparatus 1 includes a dried product transport body 2, in which an upper portion is a drying chamber 3 and a lower portion is a blower chamber 4. The dried product transport body 2 is composed of a gas ejection surface body (porous surface body) 5 having a concave groove configuration extending from the beginning to the end in the horizontal direction and having a bottom surface opening a small hole. A supply device 9 including a valve 7 and a hopper 8 for continuously feeding the material to be dried a onto the dry matter transport body 2 is provided on the starting end side 6 of the dry matter transport body 2. Moreover, the far-infrared radiator 10 which irradiates far-infrared rays to the to-be-dried object a is provided in the upper part of the to-be-dried object transport body 2, and the to-be-dried object a is sent from the gas ejection surface 5 of the dried object transport body 2 with the air blower 11. While being ventilated, the far-infrared radiator 10 emits far-infrared rays.

  The material to be dried a is continuously supplied from the supply device 9 to the start end 6 side of the dry material transport body 2, while the far-infrared radiation from the far-infrared radiator 10 is irradiated on the dry material transport body 2 on the dry material transport body 2. Then, the air to be dried a that has repeatedly floated and settled in response to the ventilation from the blower 11 and has finished drying the surface layer at the end 12 of the dried product carrier 2 sequentially overflows from the lateral overflow port 13. In addition, as shown in FIG. 2, although the stirrer 14 for stirring the to-be-dried material a is provided on the dry matter conveyance body 2, this stirrer 14 does not necessarily need to be provided.

  In the fluidized drying apparatus 1 configured as described above, a dust collection chamber 15 is provided on one end side of the dry matter transport body 2, and a concave dust collection path 16 is provided in parallel with the dry matter transport body 2. In addition, a screw conveyor 17 is provided inside the dust collecting path 16. A dust collector 18 is connected to the dust collection chamber 15. Reference numeral 19 denotes a motor chamber, which is equipped with a motor 20 for driving the blower 11 and other necessary equipment. A burner 21 is provided at one end of the far-infrared radiator 10. An exhaust tube 22 is attached to the other end of the far-infrared radiator 10.

  In the drying chamber 3, a high-pressure air injection duct 23 is provided at a position near the far-infrared radiator 10 to inject high-pressure air onto the surface thereof to blow off dust. As shown in FIG. 3, the high-pressure air injection duct 23 has a high-pressure air injection port 24 formed of a narrow long hole along the longitudinal direction of the far-infrared radiator 10. The high-pressure air injection port 24 is formed by arranging a large number of small holes or elongated elliptical holes in a line.

In the present invention, as shown in FIG. 4 , the high-pressure air injection duct 23 has a surface 25 facing along the circumferential direction of the far-infrared radiator 10, and a plurality of high-pressure air injection ports 26 on the facing surface. Oh Ru as it has. The high-pressure air injection port 26 is a narrow-width long hole or a large number of small holes or long elliptical holes arranged in a line.

Further, in the present invention, as shown in FIG. 5, if the high-pressure air injection duct 23 is configured to be able to change the opposed position of the high-pressure air injection port in the circumferential direction with respect to the far-infrared radiator 10, the far-infrared radiator 10. Since the high-pressure air can be widely sprayed on the surface, the dust removal effect can be improved. In the illustrated embodiment, the high-pressure air injection duct 23 is configured to swing around the swing shaft 27.

  In the embodiment of the present invention, as shown in FIGS. 1 and 2, the air in the motor chamber 19, which is a warm air generating space in the fluid drying apparatus 1, is sucked into the high pressure air injection duct 23 by the high pressure blower 28. It supplies and injects warm air to the far-infrared radiator 10. Thus, by injecting warm air to the far-infrared radiator 10, it is possible to suppress a decrease in the surface temperature of the far-infrared radiator 10 and to prevent a decrease in the efficiency of far-infrared irradiation on the object to be dried a.

  Moreover, the timing of injecting the high-pressure air onto the surface of the far-infrared radiator is such that the efficiency of the far-infrared radiation is reduced by injecting it for a predetermined time at the start of drying, at the end of drying, and at a certain time during drying, or at any time. This can prevent burning and burning due to the adhesion of dust.

  The dust blowing means for the far-infrared radiator 10 according to the present invention can be applied to a grain dryer equipped with the far-infrared radiator as it is. That is, it can be implemented by providing the high-pressure air jet duct 23 facing the far-infrared radiator disposed in the grain take-out chamber or the hot air chamber.

It is a partially broken perspective view which shows the outline | summary of the fluid drying apparatus concerning this invention. It is sectional drawing same as the above. It is sectional drawing which shows the relationship between a high pressure air injection nozzle and a far-infrared radiator. It is detailed sectional drawing which shows one embodiment concerning this invention . It is detail sectional drawing which shows other embodiment concerning this invention .

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fluidized drying apparatus 2 Dry matter conveyance body 3 Drying chamber 4 Air blower chamber 5 Gas ejection surface body 6 Dry end conveyance body start end side 7 Valve 8 Hopper 9 Supply apparatus 10 Far-infrared radiator 11 Blower apparatus 12 Dry matter conveyance body end side DESCRIPTION OF SYMBOLS 13 Overflow port 14 Stirrer 15 Dust collection chamber 16 Dust collection path 17 Screw conveyor 18 Dust collector 19 Motor chamber 20 Motor 21 Burner 22 Exhaust pipe 23 High pressure air injection duct 24 High pressure air injection port 25 Along the circumferential direction of a far-infrared radiator Opposing surface 26 High-pressure air injection port 27 Oscillating shaft 28 High-pressure blower a To-be-dried object

Claims (4)

Conveying dried product on the starting end side of the dried product carrier, which has a concave groove configuration in the horizontal direction and conveys the dried product consisting of a gas jetting surface with a small opening at the bottom. Equipped with a supply device that continuously feeds the material to be dried onto the body and a far-infrared radiator that irradiates the material to be dried at the upper part of the dried material carrier, and blows out the gas from the dried material carrier with the blower It is a fluidized drying device in which the material to be dried overflows sequentially from the lateral overflow port on the terminal end side of the dried material transport body while allowing the material to be dried to flow through the surface, and the air to be dried is floated and repeatedly sinks.
A high-pressure air injection duct for injecting high-pressure air onto the surface of the far-infrared radiator to blow away dust is provided at a position near the far-infrared radiator ,
The high-pressure air jet duct has surfaces facing along the circumferential direction of the far-infrared radiator, and a narrow slot or a plurality of rows of small holes along the longitudinal direction of the far-infrared radiator on the facing surface. A fluidized drying apparatus having a plurality of high-pressure air injection ports . Conveying dried product on the starting end side of the dried product carrier, which has a concave groove configuration in the horizontal direction and conveys the dried product consisting of a gas jetting surface with a small opening at the bottom. Equipped with a supply device that continuously feeds the material to be dried onto the body and a far-infrared radiator that irradiates the material to be dried at the upper part of the dried material carrier, and blows out the gas from the dried material carrier with the blower It is a fluidized drying apparatus in which the material to be dried overflows sequentially from the lateral overflow port on the terminal end side of the dried material transport body while allowing the material to be dried to flow through the surface, and the air to be dried is floated and repeatedly settled.
A high-pressure air injection duct for injecting high-pressure air onto the surface of the far-infrared radiator to blow away dust is provided at a position near the far-infrared radiator ,
The high-pressure air injection duct has a high-pressure air injection port composed of a narrow long hole or a large number of small holes in a row along the longitudinal direction of the far-infrared radiator, and in the circumferential direction with respect to the far-infrared radiator. A fluidized drying apparatus configured to be capable of changing a facing position of a high-pressure air injection port . The fluid drying apparatus according to claim 1 or 2 , wherein warm air is supplied from a warm air generation space in the fluid drying apparatus to the high pressure air injection duct to inject warm air to the far-infrared radiator. The timing for injecting high-pressure air to the surface of the far-infrared radiator according to claim 1, 2 or 3, characterized in that at regular time intervals during the drying and at the end drying started and when dry or when any of its Fluid drying equipment.

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