JPH0513695U - Multi-layer screen press - Google Patents

Abstract

(57) [Summary] [Purpose] The screw presses are arranged one above the other and connected in series to achieve efficient solid-liquid separation and save the installation area. [Structure] The lower screw press is installed below the cake discharge part of the screw press installed above, facing the feed port of the undiluted solution, and the pressing pressure of the lower screw press is higher than that of the upper screw press. I also made it higher. The squeezed cake of the upper screw press can be squeezed by the lower screw press, and the squeezing direction is changed, so that the solid-liquid separation efficiency is improved, and the installation area including auxiliary machinery and the like can be significantly reduced.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to improvement of a screw press used for sludge dewatering, etc., and in particular, in consideration, the screw press is installed in two steps vertically and does not occupy the installation area. It is a proposal.

[0002]

[Prior Art]

 Conventionally, there is known a screw press in which an outer cylinder having a screen stretched around a feed shaft having spiral blades wound around the outer cylinder is supported. The invention of Japanese Examined Patent Publication No. 60-20120 is one such example, and in the one shown in FIG. 1 of the present invention, the pitch of the spiral blade wound around the feed shaft is changed from coarse to dense.

[0003]

[Problems to be solved by the device]

 The above-mentioned conventional screw press has an enhanced cake discharge force at the outlet, but in general, in the screw press used for dewatering sludge of this kind, the feed shaft is operated at an extremely low speed, and The amount of undiluted solution at the inlet of the outer cylinder and the amount of cake at the outlet tend to be unbalanced. That is, in the heavy filtration portion at the inlet of the outer cylinder, the liquid content is easily cut off, and in the pressurization zone and the compression zone after the middle position, it is difficult to separate the liquid content, and a void is created at the outer cylinder inlet, resulting in a filtration chamber Volume utilization efficiency is low.

[0004]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention has a low-pressure screw press on the upper side and a high-pressure screw press on the lower side to connect them in series, without interruption, and to keep the stock solution at high pressure. The feature is that it is processed, and the main point is that a screw press that can feed the undiluted solution from one end and take out the cake from the other end is installed horizontally on the upper part of the machine frame. A screw press is provided below the screw press so that the stock solution supply port faces the cake discharge port of the screw press and can be operated at a higher pressure than the screw press. As an example of the screw press provided below this, a screw press capable of strongly conveying the cake by using multiple feed blades on the feed shaft is used.

[0005]

[Action]

 In the screw press according to the present invention, since the upper screw press operates at a low pressure, the cake is not clogged in the squeeze section, and the stock solution supplied to the outer cylinder is caked and discharged from the squeeze section without interruption. It is supplied to a screw press operating under high pressure below it. Then, in the lower high-pressure screw press, the supplied cake is sent to the pressurizing unit and the pressing unit by its powerful feeding blades, is pressed at a higher pressure, and is taken out of the machine from the discharging unit. In other words, in the lower screw press, it is strongly conveyed by the multi-winding feed blades and extruded from the discharge port at high pressure without clogging the pressurizing and compressing parts, during which the liquid is further separated. It is

In addition, the screw press according to the present invention does not occupy the installation area by being accommodated in the upper and lower parts in one machine frame, and is composed of two machines connected to the series, so that the stock solution and the cake are It requires minimal movement, and some auxiliary equipment such as pumps and drive equipment can be shared, so installation costs are low. The present invention will be specifically described below with reference to the drawings.

[0007]

【Example】

 In FIG. 1, reference numeral 1 is a screw press installed in the upper part of the machine frame, reference numeral 2 is a screw press installed under the machine press which operates at high pressure, and the screen press 2 at the lower part thereof has the cake hopper 3 at the upper part thereof. It is provided so as to face below the cake discharge part 4 of the screw press 1. Reference numeral 5 is a hopper for supplying the stock solution of the upper screw press 1, 6 is an outer cylinder with a screen stretched, 7 is a feed shaft, 8 is a drive motor for the feed shaft 7, 9 is a cake discharge adjusting plate, and 10 is a cake discharge adjusting plate. The cake chute, 11 is the filtrate pan.

Next, the configuration of the lower screw press will be described in detail. FIG. 2 is a side view showing the main part of the lower screw press by cutting it out. In the lower screw press 2, in order to increase the conveying force of the feed shaft 7, a double spiral blade 7a is formed around the feed shaft 7. Is wound. The lower screw press 2 is constructed such that its outer cylinder 6 is rotated in the reverse direction with respect to the feed shaft 7, 12 is its support roller, 13 is a drive gear, and 14 is a drive pinion. Incidentally, in FIG. 1, reference numeral 15 indicates a support pillar of a member constituting the machine frame, and 16 indicates a girder.

In the screw press configured as described above, the undiluted solution is supplied to the hopper 5 of the upper screw press 1, and is separated into solid and liquid while being conveyed in the outer cylinder 6 by the feed shaft 7, and the filtrate is After passing through the tray 11 and outside the machine, the cake is dropped and supplied from the discharge section 4 through the chute 10 into the hopper 3 of the lower screw press 2. The cake dropped on the hopper 3 is sent to the right in the figure in the outer cylinder 6 by the feed shaft 7 and is pressurized and squeezed to further separate the liquid. The cake is then discharged from the discharge section 4 at the right end to the outside of the machine. Taken out.

According to the present invention, the spiral blades 7a are multiply wound around the feed shaft 7 to press the cake with high pressure and simultaneously press the cake when pressing and pressing with a screw press on the lower part. Compared to pressing and compressing with a single screw press, a much more efficient solid-liquid separation operation is possible. That is, the cake is conveyed toward the pressing section without being interrupted by the spiral blades 7a that are multiply provided on the feed shaft 7, and the cake whose pressure is increased by being pushed into the pressing section by the spiral blade 7a is pushed out. Can be processed.

[0011] Further, the lower screw press, in which the spiral blade 7a is wound in multiple layers, has a strong conveying force, so that its length can be made short and compact, and it can be manufactured at low cost and can be easily installed in the machine frame. is there.

[0012]

[Effect of the device]

 As described above, the screw press according to the present invention can press and squeeze the cake at a significantly higher pressure than the conventional screw press, has a high solid-liquid separation efficiency, and is inexpensive to manufacture. The profits obtained from using the screw press are enormous, such as not including the installation area.

[Brief description of drawings]

FIG. 1 is a schematic side view showing an arrangement state of a multilayer screw press according to the present invention.

FIG. 2 is a side view showing a lower part of the screw press shown in FIG. 1 with its main part cut out.

[Explanation of symbols]

 1 Upper screw press 2 Lower screw press 3 Hopper 7 Feed shaft 7a Spiral blade 10 Chute

Claims (2)

[Scope of utility model registration request] 1. A screw press operating at a low pressure, which feeds the stock solution from one end and can take out the cake from the other end, is horizontally installed above the machine frame, and the stock solution is supplied below the screw press 1. Mouth 3 above screw press 1
The multi-layer screw press, characterized in that it is provided with a screw press 2 which faces the cake discharge part 10 and can be operated at a higher pressure than the screw press 1. 2. The multi-layer screw press according to claim 1, wherein the feed shaft 7 of the screw press 2 provided below is provided with multiple feed blades 7a.