Belt filter capable of preventing tail alkali liquor from moving backwards

Abstract

The utility model discloses a belt filter capable of preventing alkali liquor at the tail from flowing backwards. The belt filter comprises a rack and filter cloth, a blanking distribution groove is connected to the rack, a compression roller and a carrier roller are connected behind the blanking distribution groove, and filter cloth passes through the top of the carrier roller, the bottom of the compression roller and the lower part of the blanking distribution groove; a lifting roller is connected to the portion, between the carrier roller and the pressing roller, of the rack, is parallel to the carrier roller and the pressing roller and is higher than the carrier roller and the pressing roller. Compared with the prior art, through the arrangement of the compression roller, the lifting roller and the carrier roller, the contact area between the filter cloth and the compression roller is increased, the backward running resistance of alkali liquor is increased to the greatest extent, and the backward running of the alkali liquor at the tail part of the belt filter is thoroughly solved, so that the phenomena of wrinkling or deviation and the like of the filter cloth are avoided, and the service life of the filter cloth is further ensured; and the efficiency of the belt filter is improved.

Description

Technical Field

[0001] This utility model relates to the field of belt filter technology, and in particular to a belt filter that can prevent alkaline liquid from flowing back into the tail end. Background Technology

[0002] Belt filters are used in the heavy alkali filtration process to separate solid heavy alkali from the mother liquor and send it to the calcination process to produce soda ash. The technical performance of the belt filter directly affects the output of soda ash production and the consumption level of process parameters. A horizontal belt vacuum filter is a horizontally placed, fixed belt structure vacuum filtration device. Its working principle utilizes the vacuum generated by a centrifugal vacuum machine to create a driving force on both sides of the filter medium, thus separating the solid-liquid slurry. The filter medium support has a rubber belt with sufficient air penetration channels, and the filtration process is completed on a horizontal running track. Belt filters are widely used as the primary equipment in the soda ash industry for the filtration process due to their advantages such as simple structure, high dewatering efficiency, large processing capacity, low energy consumption, continuous operation, and ease of maintenance.

[0003] During enterprise production, due to increased production load and larger processing capacity of the filter press, alkaline solution often leaks to the pressure rollers at the tail end, and this phenomenon becomes more severe with prolonged operation. However, the increased amount of alkaline solution after the pressure rollers puts pressure on the filter cloth, causing wrinkles, misalignment, or even breakage and production accidents.

[0004] In summary, the existing technologies in the field of belt filter presses still have shortcomings and defects in actual production processes. Utility Model Content

[0005] The purpose of this utility model is to provide a method to prevent alkaline liquid from flowing backwards in the filter press. By setting up pressure rollers, lifting rollers, and support rollers, the contact area between the filter cloth and the pressure rollers is increased, maximizing the resistance to alkaline liquid flowing backwards. This completely solves the problem of alkaline liquid flowing backwards in the filter press, thereby avoiding wrinkles or shifting of the filter cloth, further ensuring the service life of the filter cloth, and improving the efficiency of the filter press, thus solving the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A filter press for preventing alkaline solution from flowing back into the tail end includes a frame and a filter cloth; a feeding distribution trough is connected to the frame, and a pressure roller and a support roller are connected behind the feeding distribution trough; the filter cloth passes over the top of the support roller, the bottom of the pressure roller, and below the feeding distribution trough; a lifting roller is connected to the frame between the support roller and the pressure roller, the lifting roller is parallel to the support roller and the pressure roller, and the lifting roller is higher than the support roller and the pressure roller.

[0008] A further improvement of this utility model is that a first support assembly, a second support assembly, and a third support assembly are connected to the frame, a pressure roller is connected to the first support assembly, a lifting roller is connected to the second support assembly, and a support roller is connected to the third support assembly.

[0009] A further improvement of this utility model is that the first support assembly, the second support assembly, and the third support assembly all include symmetrically arranged bearing seats, which can be horizontally adjusted on the frame; bearings are connected inside the bearing seats, and the roller shafts at both ends of the lifting roller, the idler roller, and the pressure roller are connected to the bearings.

[0010] A further improvement of this utility model is that the distance between the first support component and the second support component is 0.50 to 0.60 m, and the distance between the second support component and the third support component is 0.40 to 0.50 m.

[0011] A further improvement of this utility model is that the diameter of the pressure roller is 0.40-0.50m, its length is 0.10-0.15m less than the width of the filter cloth, and the axis of the pressure roller is 0.20-0.25m higher than the plane of the filter cloth.

[0012] A further improvement of this utility model is that the diameter of the lifting roller is 0.15-0.5m, its length is 0.05-0.10m longer than the width of the filter cloth, and the axis of the lifting roller is 0.02-0.05m higher than the plane of the filter cloth.

[0013] A further improvement of this utility model is that the diameter of the roller is 0.15-0.5m, its length is 0.05-0.10m longer than the width of the filter cloth, and the axis of the roller is 0.02-0.05m lower than the plane of the filter cloth.

[0014] A further improvement of this utility model is that the angle between the plane of the filter cloth between the lifting roller and the pressure roller and the horizontal plane is 15° to 30°, and the angle between the plane of the filter cloth between the support roller and the lifting roller and the horizontal plane is 10° to 20°.

[0015] A further improvement of this utility model is that the lifting roller, the support roller, and the pressure roller are all stainless steel cylinders.

[0016] The beneficial effects of this utility model are:

[0017] This invention prevents alkaline liquid from flowing backwards at the tail end of the filter press. By setting up pressure rollers, lifting rollers, and support rollers, the contact area between the filter cloth and the pressure rollers is increased, maximizing the resistance to alkaline liquid flowing backwards. This completely solves the problem of alkaline liquid flowing backwards at the tail end of the filter press, thereby avoiding phenomena such as wrinkles or shifting of the filter cloth, further ensuring the service life of the filter cloth, and improving the efficiency of the filter press.

[0018] This invention can prevent the alkaline solution from flowing back into the filter at the tail end, and the alkaline solution processing capacity of a single filter is also increased to a certain extent, further improving work efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0020] In the diagram: 1-frame, 2-filter cloth, 3-feeding distribution trough, 4-first support assembly, 5-pressure roller, 6-second support assembly, 7-lifting roller, 8-third support assembly, 9-support roller. Detailed Implementation

[0021] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0022] Example 1: As Figure 1 As shown, a filter press for preventing alkaline solution from flowing downstream includes a frame 1 and a filter cloth 2. A feeding distribution trough 3 is connected to the frame 1, and a pressure roller 5 and a support roller 9 are connected behind the feeding distribution trough 3. The filter cloth 2 passes over the top of the support roller 9, the bottom of the pressure roller 5, and below the feeding distribution trough 3. A lifting roller 7 is connected to the frame 1 between the support roller 9 and the pressure roller 5. The lifting roller 7 is parallel to the support roller 9 and the pressure roller 5, and is higher than the support roller 9 and the pressure roller 5.

[0023] The frame 1 is connected to a first support assembly 4, a second support assembly 6 and a third support assembly 8. The pressure roller 5 is connected to the first support assembly 4, the lifting roller 7 is connected to the second support assembly 6 and the support roller 9 is connected to the third support assembly 8.

[0024] The first support assembly 4, the second support assembly 6, and the third support assembly 8 all include symmetrically arranged bearing seats, which can be horizontally adjusted on the frame 1; bearings are connected inside the bearing seats, and the roller shafts at both ends of the lifting roller 7, the idler roller 9, and the pressure roller 5 are connected to the bearings.

[0025] The distance between the first support assembly 4 and the second support assembly 6 is 0.55m, and the distance between the second support assembly 6 and the third support assembly 8 is 0.40m. The filter cloth 2 has a width of 3.31m. The pressure roller 5, the lifting roller 7, and the support roller 9 are all stainless steel cylinders with diameters of 0.42m, 0.16m, and 0.16m, respectively, and lengths of 3.11m, 3.42m, and 3.42m, respectively.

[0026] After the device is put into the belt filter, the contact area between the filter cloth 2 and the pressure roller 5 after the feeding distribution trough 3 is greatly increased, the resistance to alkaline liquid backflow increases, and under long-term high load conditions of the belt filter, the occurrence of wrinkles or displacement of the filter cloth 2 caused by alkaline liquid backflow is completely avoided, thus extending the service life of the filter cloth 2.

[0027] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent transformations or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A filter press designed to prevent alkaline solution from flowing downstream, characterized in that: Includes a frame (1) and a filter cloth (2); the frame (1) is connected to a feeding distribution groove (3), and a pressure roller (5) and a support roller (9) are connected behind the feeding distribution groove (3). The filter cloth (2) passes over the top of the support roller (9), the bottom of the pressure roller (5) and below the feeding distribution groove (3); a lifting roller (7) is connected on the frame (1) between the support roller (9) and the pressure roller (5). The lifting roller (7) is parallel to the support roller (9) and the pressure roller (5), and the lifting roller (7) is higher than the support roller (9) and the pressure roller (5).

2. The filter press as described in claim 1, characterized in that: The frame (1) is connected to a first support assembly (4), a second support assembly (6) and a third support assembly (8). The pressure roller (5) is connected to the first support assembly (4), the lifting roller (7) is connected to the second support assembly (6), and the support roller (9) is connected to the third support assembly (8).

3. The filter press as described in claim 2, characterized in that: The first support assembly (4), the second support assembly (6) and the third support assembly (8) all include symmetrically arranged bearing seats, which can be horizontally adjusted on the frame (1); the bearing seats are connected to bearings, and the roller shafts at both ends of the lifting roller (7), the idler roller (9) and the pressure roller (5) are connected to the bearings.

4. The filter press as described in claim 2, characterized in that: The distance between the first support component (4) and the second support component (6) is 0.50 to 0.60 m, and the distance between the second support component (6) and the third support component (8) is 0.40 to 0.50 m.

5. The filter press as described in claim 1, characterized in that: The diameter of the pressure roller (5) is 0.40-0.50m, its length is 0.10-0.15m less than the width of the filter cloth (2), and the axis of the pressure roller (5) is 0.20-0.25m higher than the plane of the filter cloth (2).

6. The filter press as described in claim 1, characterized in that: The lifting roller (7) has a diameter of 0.15 to 0.5 m and its length is 0.05 to 0.10 m longer than the width of the filter cloth (2). The axis of the lifting roller (7) is 0.02 to 0.05 m higher than the plane of the filter cloth (2).

7. The filter press as described in claim 1, characterized in that: The diameter of the roller (9) is 0.15 to 0.5 m, and its length is 0.05 to 0.10 m longer than the width of the filter cloth (2). The axis of the roller (9) is 0.02 to 0.05 m lower than the plane of the filter cloth (2).

8. The filter press as described in claim 1, characterized in that: The angle between the plane of the filter cloth (2) between the lifting roller (7) and the pressure roller (5) and the horizontal plane is 15° to 30°, and the angle between the plane of the filter cloth (2) between the support roller (9) and the lifting roller (7) and the horizontal plane is 10° to 20°.

9. A filter press as described in claim 1, characterized in that: The lifting roller (7), the support roller (9), and the pressure roller (5) are all stainless steel cylinders.

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