A vertical multi-tube filter

Abstract

The utility model relates to filter manufacturing technical field, concretely relates to a vertical multi -tube type filter. Include: the jar body, be equipped with jar cavity in it, a plurality of groups of filter core, its setting jar cavity is in, with a plurality of groups of filter core intercommunication backflow mouth, blow -by intake and discharge port, feed inlet, its setting jar body downside, the discharge port of setting in jar body bottom, set up in jar body top positive blow mouth and exhaust port, the drain pipe, the drain pipe quantity is at least 2, one end of drain pipe intercommunication jar cavity, is equipped with drain valve on the drain pipe, and drain valve is located jar body outside, the drain pipe includes the inclined section setting between jar body and drain valve, the inclined section is relative to horizontal direction and is inclined setting and near drain valve one end higher than the other end. Can guarantee the continuity, stability and effectiveness of the drainage process.

Description

Technical Field

[0001] This utility model relates to the field of filter manufacturing technology, specifically to a vertical multi-tube filter. Background Technology

[0002] Vertical multi-tube filters, also known as candle filters, are high-efficiency, energy-saving precision filtration devices widely used in solid-liquid separation processes in industries such as chemical, food, and pharmaceutical. Their core structure mainly consists of a sealed tank containing multiple vertically mounted filter elements. During operation, the suspension to be filtered enters the tank cavity under pressure through the inlet at the bottom. Solid particles are trapped on the surface of the filter elements, forming a filter cake, while the clarified filtrate penetrates the internal channels of the filter elements and is discharged through the outlet. As filtration progresses, the filter cake gradually thickens, increasing filtration resistance, requiring regeneration and slag removal through backflushing and forward flushing. This equipment offers advantages such as high filtration accuracy, automated operation, and high filter cake thickness, making it particularly suitable for processing materials with high viscosity and high solids content.

[0003] However, in the practical application of existing vertical multi-tube filters, the reliability of the drainage process has become increasingly prominent. Traditional drainage pipelines are usually designed with a single outlet or multiple outlets but lack effective anti-clogging and backup mechanisms. In actual production, especially when processing materials containing fibers, easily crystallizing materials, or materials with thixotropic properties, the drainage pipeline is prone to blockage due to solid particle deposition or media solidification. Once blockage occurs, not only does the filtration operation need to be interrupted for manual cleaning, severely impacting production efficiency, but untimely cleaning may also lead to residual liquid in the tank contaminating the next batch of products. In addition, existing drainage outlet pipelines are mostly horizontally arranged or inclined with a higher base and lower outer end. If existing drainage outlets are used, liquid stagnation and accumulation are likely to occur. Therefore, there is an urgent need for an innovative solution that can effectively address drainage blockage, prevent pipeline accumulation, and ensure a stable and reliable drainage process. Utility Model Content

[0004] To overcome the shortcomings of the prior art, this utility model provides a vertical multi-tube filter that can ensure the continuity, stability and effectiveness of the drainage process.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: A vertical multi-tube filter, comprising: The tank body has a tank cavity inside; Several sets of filter elements are installed inside the tank cavity; A return port, a backflush inlet, and a discharge port that are connected to several sets of filter elements; The feed inlet is located on the lower side of the tank. The slag discharge port is located at the bottom of the tank. The positive air inlet and the exhaust outlet are located at the top of the tank. The drain pipe has at least two drain pipes, one end of which is connected to the tank cavity. The drain pipe is equipped with a drain valve located on the outside of the tank body. The drain pipe includes an inclined section between the tank body and the drain valve. The inclined section is inclined relative to the horizontal direction and the end near the drain valve is higher than the other end.

[0006] Furthermore, a vertical multi-tube filter of this application also includes an integrated pipe installed on the outside of the tank, wherein the return port, the backflush inlet, and the discharge port are disposed on the integrated pipe. As a preferred embodiment of this application, based on the above structure, the flow channel layout is simplified and the space utilization rate is improved.

[0007] Furthermore, in a vertical multi-tube filter of this application, each group of filter elements is connected to the integrated pipe via a filter element tube passing through the side wall of the tank, and the filter element tube is equipped with a filter element flow channel valve. As a preferred embodiment of this application, by setting the filter element tube and the filter element flow channel valve, independent control of each group of filter elements can be achieved.

[0008] Furthermore, a vertical multi-tube filter according to this application also includes a pair of differential pressure transmitters, which are respectively installed on the pipe corresponding to the inlet and the integrated pipe. As a preferred embodiment of this application, the differential pressure transmitters are used to monitor the change in liquid pressure difference between the inner and outer ends of the filter element and transmit the signal to the control system.

[0009] Furthermore, a vertical multi-tube filter according to this application also includes a pressure transmitter disposed at the top of the tank. As a preferred embodiment of this application, the pressure transmitter is used to monitor changes in the pressure value inside the tank cavity.

[0010] Furthermore, in one vertical multi-tube filter of this application, a set of drain pipes are spaced apart in the vertical direction of the tank. As a preferred embodiment of this application, the spaced drain pipes in the vertical direction facilitate the opening of holes in the tank.

[0011] Furthermore, in a vertical multi-tube filter of this application, the angle between the inclined section and the horizontal direction ranges from 2° to 3°.

[0012] Furthermore, in a vertical multi-tube filter of this application, the return port is located at one end of the integrated tube, and a sight glass is provided at the end of the integrated tube near the return port.

[0013] As can be seen from the above technical solution, this utility model has the following beneficial effects: This invention provides a vertical multi-tube filter. After filtration, during drainage, one drain pipe is opened while the others are closed. If the current drain pipe becomes blocked, the system switches to another drain pipe to continue operation. This ensures the continuity and stability of the drainage process and avoids operational interruptions due to pipe blockage. Simultaneously, the inclined section design allows unused liquid in the drain pipes to flow back into the tank cavity under gravity, preventing liquid accumulation in the drain pipes and ensuring effective drainage. Attached Figure Description

[0014] Figure 1 This is a front plan view of a vertical multi-tube filter according to an embodiment of this application; Figure 2 This is a plan view of a vertical multi-tube filter according to an embodiment of this application.

[0015] In the diagram: 1-Tank body; 11-Filter element; 111-Filter element tube; 1110-Filter element flow channel valve; 12-Inlet; 13-Drain pipe; 131-Drain valve; 132-Inclined section; 14-Integrated pipe; 141-Return port; 142-Backflush air inlet; 143-Outlet; 15-Slag discharge port; 16-Forward blow port; 17-Exhaust port; 18-Spraying device. Detailed Implementation Example

[0016] Combination Figure 1 and Figure 2 A vertical multi-tube filter is shown, comprising: Tank body 1, which has a tank cavity inside. Several sets of filter elements 11 are disposed inside the tank cavity; A return port 141, a backflush inlet 142, and a discharge port 143 are connected to several sets of filter elements 11; The feed inlet 12 is located on the lower side of the tank body 1; Slag discharge port 15 is located at the bottom of tank body 1; Spraying device 18 is installed at the top of the tank cavity; A blow-out port 16 and an exhaust port 17 are provided on the top of the tank body 1; The drain pipe 13, the number of which is at least 2, one end of the drain pipe 13 is connected to the tank cavity, and the drain pipe 13 is provided with a drain valve 131, the drain valve 131 is located outside the tank body 1, the drain pipe 13 includes an inclined section 132 disposed between the tank body 1 and the drain valve 131, the inclined section 132 is inclined relative to the horizontal direction and the end near the drain valve 131 is higher than the other end.

[0017] In this embodiment, an integrated pipe 14 is also installed on the outside of the tank body 1, and the return port 141, the backflush air inlet 142 and the discharge port 143 are arranged on the integrated pipe 14.

[0018] In this embodiment, the return port 141 and the backflush air inlet 142 are located at both ends of the integrated tube 14, and the discharge port 143 is located in the middle section of the integrated tube 14, and the integrated tube 14 is horizontally arranged. Based on the above structure, the flow channel layout is simplified and the space utilization is improved.

[0019] In this embodiment, each group of filter elements 11 is connected to the integrated pipe 14 via a filter element tube 111 passing through the side wall of the tank body 1. A filter element flow channel valve 1110 is provided on the filter element tube 111. By setting the filter element tube 111 and the filter element flow channel valve 1110, independent control of each group of filter elements 11 can be achieved. In this embodiment, the number of filter element tubes 111 is 4.

[0020] In this embodiment, a pair of differential pressure transmitters are also included, which are respectively installed on the pipe corresponding to the inlet 12 and on the integrated pipe 14. The differential pressure transmitters are used to monitor the change in liquid pressure difference between the inner and outer ends of the filter element 11 and transmit the signal to the control system. In this embodiment, a return port 141 is located at one end of the integrated pipe 14, and a sight glass is provided at the end of the integrated pipe 14 near the return port 141.

[0021] In this embodiment, a pressure transmitter is also included, which is installed at the top of the tank 1. The pressure transmitter is used to monitor changes in the pressure inside the tank cavity.

[0022] In this embodiment, a set of drain pipes 13 are spaced apart in the vertical direction of the tank body 1. The spaced-apart drain pipes 13 facilitate the opening of holes in the tank body 1. It should be noted that, to ensure effective drainage, the drain pipes 13 are provided with extension pipes (not shown) extending to the bottom of the tank cavity. In this embodiment, the number of drain pipes 13 is 3, and the distance between adjacent drain pipes 13 is 250 mm.

[0023] In this embodiment, the angle between the inclined segment 132 and the horizontal direction is in the range of 2° to 3°.

[0024] Based on the above-described device, the method of using a vertical multi-tube filter in this embodiment includes the following steps: Filtration process After the raw material is pressurized by the raw material pump, it enters the tank 1 through the inlet 12. The vent 17 is opened. When the liquid level reaches the set value, the vent 17 is closed and the flow channel valves 1110 of each filter element are opened at the same time. The return port 141 is opened and the liquid after initial filtration flows back into the raw material tank. When the filter cake is formed, the clear liquid after filtration is observed through the sight glass set at the end of the integrated pipe 14 near the return port 141. When the expected filtration effect is achieved, the valve corresponding to the return port 141 is closed and the valve corresponding to the outlet 143 is opened, and the normal filtration process begins.

[0025] Cleaning process As filtration continues, the filter cake on the filter element surface thickens, reducing the actual flow area and consequently increasing the pressure differential. When the pressure differential reaches a set value (usually 0.15 MPa), the PLC initiates the cleaning program. First, another standby filter enters the filtration process.

[0026] Then, close the valve at the inlet 12 of the filter to be cleaned, open the valve on the forward blow port 16, and begin forward blowing. During forward blowing, liquid in the vertical pipe shared with the exhaust port 17 can be blown into the tank 1 without affecting the next venting process. Forward blowing filters the liquid in the tank 1 to the bottom of the filter element 11. When the liquid level is low enough that it cannot be discharged through the filter element 11, nitrogen gas continuously passes through the filter element 11. Because nitrogen gas has a much higher permeability than liquid, the gas pressure difference inside and outside the filter element 11 will be much lower than the liquid pressure difference. When the PLC detects that the pressure difference change exceeds or falls below the set value, it indicates that the forward-blown liquid has reached the bottom of the filter element 11, and the filter cake drying stage can begin. The filter cake drying time can be adjusted according to the debugging results.

[0027] When the filter cake has dried to the desired consistency, open the residual liquid reflux valve and close the outlet branch valve. Begin the process of draining the bottom residual liquid; the draining time can be adjusted based on the time values ​​set during the commissioning phase.

[0028] After the residual liquid is drained, close the forward blow valve and the residual liquid return valve, open the bottom drain valve, and begin the filter cartridge backflushing process. Backflush each group of filter cartridges 11 one by one. During backflushing, open the backflushing air inlet 142, then open the filter cartridge flow channel valve 1110 corresponding to each group of filter cartridges 11 one by one. Backflush for 1-3 seconds, then close the current filter cartridge tube 11110 for 10 seconds, then open it again for 1-3 seconds. Repeat this process 3 times (the number of times is adjustable). Then repeat the above backflushing process for the next group of filter cartridges 11 until all filter cartridges 11 are backflushed. The filter cake that falls off during backflushing is discharged through the bottom slag discharge port 15 under gravity and falls into a sealed filter cake recovery container along the drain pipe. Once the container is full of filter cake, it is transported to the filter cake processing area.

[0029] After filtration, during drainage, one drain pipe 13 is opened while the others are closed. If the current drain pipe 13 becomes blocked, the process is switched to another drain pipe 13 to continue operation. This ensures the continuity and stability of the drainage process and avoids operational interruptions due to pipe blockage. Simultaneously, the inclined section 132 design allows liquid in unused drain pipes 13 to flow back into the tank cavity under gravity, preventing liquid accumulation in the drain pipes 13 and ensuring effective drainage.

[0030] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on the explanation herein, those skilled in the art can conceive of other specific embodiments of this utility model without creative effort, and these embodiments will all fall within the scope of protection of this utility model.

Claims

1. A vertical multi-tube filter, characterized in that: include: The tank body (1) has a tank cavity inside; Several sets of filter elements (11) are arranged inside the tank cavity; A return port (141), a backflush inlet (142), and a discharge port (143) are connected to several sets of filter elements (11). The feed inlet (12) is located on the lower side of the tank body (1); Slag discharge port (15) is located at the bottom of tank body (1); A blow-out port (16) and an exhaust port (17) are provided on the top of the tank (1). The number of drain pipes (13) is at least 2. One end of the drain pipe (13) is connected to the tank cavity. A drain valve (131) is provided on the drain pipe (13). The drain valve (131) is located outside the tank body (1). The drain pipe (13) includes an inclined section (132) between the tank body (1) and the drain valve (131). The inclined section (132) is inclined relative to the horizontal direction and the end near the drain valve (131) is higher than the other end.

2. A vertical multi-tube filter according to claim 1, characterized in that: A set of drain pipes (13) are spaced apart in the vertical direction of the tank (1).

3. A vertical multi-tube filter according to claim 1, characterized in that: The angle between the inclined segment (132) and the horizontal direction ranges from 2° to 3°.

4. A vertical multi-tube filter according to claim 1, characterized in that: It also includes an integrated pipe (14) installed on the outside of the tank body (1), wherein the return port (141), the backflush air inlet (142) and the discharge port (143) are provided on the integrated pipe (14).

5. A vertical multi-tube filter according to claim 4, characterized in that: Each filter element (11) is connected to the integrated pipe (14) through a filter element pipe (111) that passes through the side wall of the tank (1). The filter element pipe (111) is equipped with a filter element flow channel valve (1110).

6. A vertical multi-tube filter according to claim 4, characterized in that: It also includes a pair of differential pressure transmitters, which are respectively installed on the pipe corresponding to the feed inlet (12) and the integrated pipe (14).

7. A vertical multi-tube filter according to claim 1, characterized in that: It also includes a pressure transmitter located on top of the tank (1).

8. A vertical multi-tube filter according to claim 4, characterized in that: The return port (141) is located at one end of the integrated tube (14), and the end of the integrated tube (14) near the return port (141) is provided with a viewing cup.

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