Detachable automatic backwashing filtering device

Abstract

The utility model relates to a detachable automatic backwashing filtering device which comprises a main pipeline, a bypass pipeline and a blow-off pipeline, a liquid inlet and a liquid outlet are formed in the two ends of the main pipeline respectively, and an inlet self-control valve, a filter, a standby self-control valve and an outlet self-control valve are sequentially arranged between the liquid inlet and the liquid outlet in the liquid flowing direction. The bypass pipeline and the blow-off pipeline are both communicated with the main pipeline, a bypass self-control valve is arranged on the bypass pipeline, and a blow-off self-control valve is arranged on the blow-off pipeline. An inlet pressure gauge and an outlet pressure gauge are arranged on the main pipeline; and all the pressure gauges and the self-control valves are connected into an industrial automatic control system. By arranging the bypass pipeline and the blow-off pipeline, backwashing of the filter can be realized without shutdown, so that washed impurities are directly flushed into the blow-off pipeline and discharged. The automatic control valve and the pressure gauge are connected into an industrial automatic control system, so that the filtering system can be monitored in real time, and the blockage condition of the filter can be automatically judged.

Description

Technical Field

[0001] This utility model relates to the field of chemical production, and in particular to a detachable automatic backwashing filter device. Background Technology

[0002] In chemical production processes, there are many types of filters. Bag filters are widely used in primary and fine filtration processes in the chemical industry due to their advantages such as simple structure, convenient operation, high filtration accuracy, and low cost.

[0003] However, cleaning bag filters is a rather cumbersome process. When cleaning or replacing the filter bags is necessary, the machine must be stopped, and the filter end caps must be manually opened to remove the filter bags for cleaning or replacement. This process is not only time-consuming and labor-intensive but can also lead to production interruptions and reduced efficiency. Furthermore, frequent manual operation can increase operational risks, such as filter bag damage or poor sealing.

[0004] Secondly, bag filters are prone to clogging during use, especially when processing high-viscosity liquids or materials containing a large amount of impurities. Once the filter bags are clogged, the filtration rate drops significantly, and existing bag filters typically lack effective real-time monitoring methods, making it difficult to determine in a timely manner whether the filter bags are clogged. This can lead to a decrease in filtration efficiency and even affect the normal operation of downstream equipment. Utility Model Content

[0005] In view of the problems of chemical production interruption caused by filter cleaning and the inability to monitor filter blockage in real time in the existing technology, this utility model provides a detachable automatic backwashing filter device, including a main pipe, a bypass pipe and a sewage discharge pipe.

[0006] The main pipeline has an inlet and an outlet at its two ends, and an inlet self-control valve, a filter, a backup self-control valve and an outlet self-control valve are sequentially arranged between the inlet and the outlet along the liquid flow direction.

[0007] Both ends of the bypass pipeline are connected to the main pipeline. One end of the bypass pipeline is located between the liquid inlet and the inlet automatic control valve, and the other end is located between the standby automatic control valve and the outlet automatic control valve. A bypass automatic control valve is installed on the bypass pipeline.

[0008] The sewage discharge pipe is connected to the main pipe, and the sewage discharge pipe is located between the inlet automatic control valve and the filter. The sewage discharge pipe is equipped with a sewage discharge automatic control valve.

[0009] An inlet pressure gauge is installed between the liquid inlet and the inlet self-control valve, and an outlet pressure gauge is installed between the standby self-control valve and the liquid outlet;

[0010] The inlet pressure gauge, the outlet pressure gauge, the inlet automatic control valve, the outlet automatic control valve, the bypass automatic control valve, the sewage discharge automatic control valve, and the standby automatic control valve are all connected to the industrial automation control system.

[0011] Furthermore, the inlet automatic control valve, the filter, the standby automatic control valve, and the outlet automatic control valve are all connected to the main pipeline via flanges; the bypass automatic control valve is connected to the bypass pipeline via a flange; and the sewage automatic control valve is connected to the sewage pipeline via a flange.

[0012] Furthermore, the main pipe between the filter and the backup automatic control valve is a bend, and the outlet of the sewage pipe faces the filter.

[0013] Furthermore, the acute angle formed between the axis of the pipe opening near the filter and the main pipe is 30°, and the obtuse angle formed between the pipe opening and the sewage pipe is 155°.

[0014] Furthermore, the filter is a double-layer flat cage-type filter screen, and the filter screen pore size on the side closer to the inlet automatic control valve is larger than the filter screen pore size on the side closer to the standby automatic control valve.

[0015] Furthermore, the main pipe connecting the filter and the backup automatic control valve is a reducing pipe, and the diameter of the pipe on the side closer to the filter is smaller than the diameter of the pipe on the side closer to the backup automatic control valve.

[0016] Furthermore, the connection between the sewage pipe and the main pipe is a rounded corner.

[0017] Furthermore, industrial automation control systems include centralized and distributed control systems (DCS) and programmable logic controllers (PLC).

[0018] Compared with the prior art, this utility model has the following beneficial effects:

[0019] Backwashing of the filter can be achieved by setting up bypass and drain pipes, allowing impurities to be flushed directly into the drain pipe and discharged along it. Installing a variable-diameter pipe before the filter increases the flushing force during backwashing, enhancing its effectiveness. By connecting the automatic control valve and pressure gauge to the industrial automation control system, the filtration system can be monitored in real time, automatically determining filter clogging status and automatically backwashing without shutting down the system, significantly reducing the workload for personnel. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0021] Figure 2This is a schematic diagram of the pipe angle at the filter in an embodiment of this utility model;

[0022] In the diagram: 1. Inlet pressure gauge; 2. Outlet pressure gauge; 3. Inlet automatic control valve; 4. Outlet automatic control valve; 5. Bypass automatic control valve; 6. Drain automatic control valve; 7. Filter screen; 8. Standby automatic control valve; 9. Liquid inlet; 10. Liquid outlet; 11. Main pipeline; 12. Bypass pipeline; 13. Drain pipeline; 14. Bend. Detailed Implementation

[0023] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0024] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. The terms "upper," "lower," "front," "rear," "top," "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or part referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. It should be understood that such data can be interchanged where appropriate for the embodiments of this utility model described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0025] like Figure 1 As shown, a detachable automatic backwashing filter device includes a main pipe 11, a bypass pipe 12 and a sewage pipe 13.

[0026] The main pipeline 11 has an inlet 9 and an outlet 10 at its two ends. Between the inlet 9 and the outlet 10, an inlet automatic control valve 3, a filter 7, a spare automatic control valve 8 and an outlet automatic control valve 4 are installed in sequence along the direction of liquid flow.

[0027] Both ends of the bypass pipe 12 are connected to the main pipe 11. One end of the bypass pipe 12 is located between the liquid inlet 9 and the inlet automatic control valve 3, and the other end is located between the standby automatic control valve 8 and the outlet automatic control valve 4. A bypass automatic control valve 5 is installed on the bypass pipe 12.

[0028] The sewage discharge pipe 13 is connected to the main pipe 11. The sewage discharge pipe 13 is located between the inlet automatic control valve 3 and the filter 7. The sewage discharge automatic control valve 5 is installed on the sewage discharge pipe 13.

[0029] An inlet pressure gauge 1 is installed between the liquid inlet 9 and the inlet self-control valve 3, and an outlet pressure gauge 2 is installed between the standby self-control valve 8 and the liquid outlet 10.

[0030] The inlet pressure gauge 1, outlet pressure gauge 2, inlet automatic control valve 3, outlet automatic control valve 4, bypass automatic control valve 5, drain automatic control valve 6, and standby automatic control valve 8 are all connected to the industrial automation control system. The industrial automation control system can monitor the pressure values ​​at the inlet 9 and outlet 10, thereby determining whether backwashing of the filter 7 is necessary, and controlling the opening and closing of the corresponding automatic control valves as needed. In this embodiment, the industrial automation control system includes a DCS centralized distributed control system and a PLC programmable logic controller.

[0031] The inlet automatic control valve 3, filter 7, standby automatic control valve 8 and outlet automatic control valve 4 are all connected to the main pipeline 11 through flanges; the bypass automatic control valve 5 is connected to the bypass pipeline 12 through a flange; and the sewage discharge automatic control valve 6 is connected to the sewage discharge pipeline 13 through a flange.

[0032] The working principle of this utility model is as follows: When the pipeline is running normally, the inlet self-control valve 3, the standby self-control valve 8 and the outlet self-control valve 4 are in the open state, and the other self-control valves are in the closed state. The liquid flows into the main pipeline 11 from the inlet 9, and after passing through the filter 7 to filter impurities, it flows out from the outlet 10 to the next pipeline.

[0033] When the industrial automation control system detects that the difference between the inlet pressure gauge 1 and the outlet pressure gauge 2 is greater than or equal to 0.15 MPa, it indicates that filter 7 is clogged due to impurity deposition, requiring backwashing. At this time, the industrial automation control system will automatically close the inlet automatic control valve 3 and the outlet automatic control valve 4, and open the bypass automatic control valve 5 and the drain automatic control valve 6. The standby automatic control valve 8 remains open. Liquid flows from the inlet 9 through the bypass pipe 12. Because the inlet automatic control valve 3 is closed, the liquid can only flow in one direction (drain pipe 13), thus flushing impurities on the side of filter 7 near the inlet 9 into the drain pipe 13 and discharging them. Backwashing of filter 7 can be completed without stopping the pump, and the backwashing time can be set by the industrial automation control system according to actual conditions.

[0034] To further improve backwashing efficiency, such as Figure 1 and Figure 2As shown, the main pipe 11 between the filter 7 and the standby automatic control valve 8 is a bend 14, and the bend 14 gradually curves from the end connected to the standby automatic control valve 8. One end of the bend 14 is connected to the rear section of the main pipe 11 through the standby automatic control valve 8, and the other end is connected to the filter 7 and communicates with the front section of the main pipe 11; the front section and the rear section of the main pipe 11 are parallel. The front and rear sections of the main pipe 11 are determined according to the liquid flow direction. With this arrangement, the water flow can have a downward force during backwashing. At the same time, the outlet of the drain pipe 13 faces the filter 7, allowing the impurities being flushed to be directly flushed into the drain pipe 13 and discharged. Figure 2 As shown, in a preferred embodiment, the acute angle α formed between the axis of the pipe opening of the bend 14 near the filter 7 and the main pipe 11 is 30°, and the obtuse angle β formed between the bend 14 and the sewage pipe 13 is 155°.

[0035] If the time interval between two consecutive automatic backwashes is less than or equal to 10 minutes, it indicates that filter 7 is severely clogged, and the pump must be stopped, requiring manual disassembly and cleaning of filter 7. Since all automatic control valves and pipelines are connected by flanges, manual cleaning of filter 7 can be performed by simply disconnecting the pipeline connection between filter 7, drain valve 6, and inlet valve 3. If there is a short-term need for liquid flow during filter 7 disassembly and cleaning, the standby automatic control valve 8 can be temporarily closed and the bypass automatic control valve 5 opened to ensure liquid flow.

[0036] Filter 7 is a double-layer flat cage-type filter screen, and the pore size of the filter screen on the side closer to the inlet automatic control valve 3 is larger than that on the side closer to the standby automatic control valve 8. This first filters large-particle impurities, then small-particle impurities, thereby improving filtration efficiency and reducing the frequency of clogging. In this embodiment, the pore size of the filter screen on the side closer to the inlet automatic control valve 3 is 3mm, and the pore size of the filter screen on the side closer to the standby automatic control valve 8 is 2mm.

[0037] The main pipe 11 connecting filter 7 and standby automatic control valve 8 is a reducing pipe, with the diameter of the pipe on the side closer to filter 7 being smaller than the diameter of the pipe on the side closer to standby automatic control valve 8. By reducing the pipe diameter, the flushing force can be increased during backwashing, thus enhancing the backwashing effect.

[0038] The connection between the sewage pipe 13 and the main pipe 11 is a rounded corner, which allows for a smooth transition between the pipes and reduces resistance to liquid flow, as well as reducing impurities entering the main pipe 11.

[0039] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of implementation of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this utility model, and all such improvements and modifications should be covered within the protection scope of this utility model.

Claims

1. A detachable automatic backwashing filter device, characterized in that, It includes the main pipeline (11), the bypass pipeline (12), and the sewage pipeline (13); The main pipeline (11) has an inlet (9) and an outlet (10) at its two ends, respectively. An inlet self-control valve (3), a filter (7), a spare self-control valve (8) and an outlet self-control valve (4) are arranged sequentially between the inlet (9) and the outlet (10) along the direction of liquid flow. Both ends of the bypass pipe (12) are connected to the main pipe (11). One end of the bypass pipe (12) is located between the liquid inlet (9) and the inlet automatic control valve (3), and the other end is located between the standby automatic control valve (8) and the outlet automatic control valve (4). A bypass automatic control valve (5) is provided on the bypass pipe (12). The sewage pipe (13) is connected to the main pipe (11). The sewage pipe (13) is located between the inlet automatic control valve (3) and the filter (7). A sewage automatic control valve (6) is installed on the sewage pipe (13). An inlet pressure gauge (1) is provided between the liquid inlet (9) and the inlet self-control valve (3), and an outlet pressure gauge (2) is provided between the standby self-control valve (8) and the liquid outlet (10); The inlet pressure gauge (1), the outlet pressure gauge (2), the inlet automatic control valve (3), the outlet automatic control valve (4), the bypass automatic control valve (5), the sewage discharge automatic control valve (6), and the standby automatic control valve (8) are all connected to the industrial automation control system.

2. The detachable automatic backwashing filter device according to claim 1, characterized in that, The inlet automatic control valve (3), the filter (7), the standby automatic control valve (8), and the outlet automatic control valve (4) are all connected to the main pipeline (11) via flanges; the bypass automatic control valve (5) is connected to the bypass pipeline (12) via flanges; and the sewage automatic control valve (6) is connected to the sewage pipeline (13) via flanges.

3. The detachable automatic backwashing filter device according to claim 1, characterized in that, The main pipe (11) between the filter (7) and the standby automatic control valve (8) is a bend (14), and the outlet of the sewage pipe (13) faces the filter (7).

4. A detachable automatic backwashing filter device according to claim 3, characterized in that, The acute angle formed between the axis of the bend (14) near the filter (7) and the main pipe (11) is 30°, and the obtuse angle formed between the bend (14) and the drain pipe (13) is 155°.

5. A detachable automatic backwashing filter device according to claim 1, characterized in that, The filter (7) is a double-layer flat cage filter screen, and the filter screen aperture on the side closer to the inlet self-control valve (3) is larger than the filter screen aperture on the side closer to the standby self-control valve (8).

6. A detachable automatic backwashing filter device according to claim 1 or claim 3, characterized in that, The main pipe (11) connecting the filter (7) and the backup automatic control valve (8) is a reducing pipe, and the pipe diameter on the side closer to the filter (7) is smaller than the pipe diameter on the side closer to the backup automatic control valve (8).

7. A detachable automatic backwashing filter device according to claim 1 or claim 3, characterized in that, The connection between the sewage pipe (13) and the main pipe (11) is a rounded corner.

8. A detachable automatic backwashing filter device according to claim 1, characterized in that, Industrial automation control systems include DCS (Distributed Control System) and PLC (Programmable Logic Controller).

Images