Precise pre-coating filtering system with slag press back-blowing cleaning structure

Abstract

The utility model relates to the technical field of precise pre-coating filtering systems, in particular to a precise pre-coating filtering system with a slag pressing device back flushing cleaning structure, which comprises a fiber powder adding pre-coating device, a pre-coating filter, a slag liquid discharging and recycling device and a slag pressing device which are communicated with one another, the system further comprises a gas supply pipeline used for being connected with a compressed gas system, the gas supply pipeline is finally communicated with a three-way pipe through a plurality of branch pipelines, a three-way valve is installed on the three-way pipe, the three-way pipe is provided with a gas inlet, a back-flushing opening and a liquid discharging opening, the back-flushing opening is communicated with the slag pressing device, and switching of different functions is achieved through the three-way valve. After the residue pressing device is used for pressing, the three-way valve is switched to a liquid discharging function, so that filtrate in the residue pressing device flows out from a liquid discharging opening under the action of negative pressure; after the system finishes working, the three-way valve can be switched to a backflushing function, and filter residues on a filter assembly in the residue pressing device are purged and loosened by using compressed gas.

Description

Technical Field

[0001] This application relates to the field of precision pre-coated filtration system technology, and in particular to a precision pre-coated filtration system with a backflushing cleaning structure for a slag press. Background Technology

[0002] Precision pre-coated filtration systems are highly efficient solid-liquid separation devices commonly used in the chemical, food, and pharmaceutical industries. The system consists of a fiber powder pre-coating device, a pre-coated filter, a sludge discharge and recovery device, and an electrical control system. After filtration, the filter residue is trapped and accumulates on the pre-coating layer. As the filtration process continues, the filter residue gradually accumulates to a certain thickness. The system then transports the filter residue to a press for pressing according to a preset program. The compressed solid residue is finally discharged, awaiting further processing.

[0003] Existing filter presses typically use rotary mechanical seals for sealing. These seals consist of one or more pairs of contacting rotating and stationary rings, relying on a liquid film or lubricating layer to maintain the seal. During filter pressing, water is squeezed out of the filter cake, flows through the filter screen, collects at the bottom of the press, and flows out through the drain pipe at the bottom. After pressing is complete, the bottom of the press opens to form an outlet, and the filter cake inside falls naturally under gravity.

[0004] Over time, filters can easily become clogged, and replacing the filter is generally used to ensure smooth system operation. However, this method requires frequent manual inspection and replacement, resulting in high labor costs, and there is still room for improvement. Utility Model Content

[0005] To reduce the frequency of filter replacement, reduce labor costs, and improve convenience, this application provides a precision pre-coated filtration system with a backflushing cleaning structure for a slag press.

[0006] The precision pre-coated filtration system with a slag press backflushing cleaning structure provided in this application adopts the following technical solution:

[0007] A precision pre-coated filtration system with a slag press back-flushing cleaning structure includes a fiber powder pre-coating device, a pre-coated filter, a slag liquid discharge and recovery device, and a slag press connected in series, with a slag storage car installed below the slag press;

[0008] It also includes a gas supply pipe for connecting to a compressed gas system, wherein a primary branch pipe is connected between the gas supply pipe and the pre-coated filter, the primary branch pipe is equipped with a valve, and the primary branch pipe is connected to a tee pipe;

[0009] The three-way valve is connected to the first-stage branch pipe at one end as an air inlet. The three-way valve is installed at one end of the air inlet, and the other end branches to form a backflush port and a drain port. The drain port is used to connect to an external drain pipe. The slag press includes a main body and a pressure cover. A filter assembly is installed inside the pressure cover. A receiving cavity is formed between the filter assembly and the inner wall of the pressure cover. An interface communicating with the receiving cavity is formed at the lower end of the pressure cover. The backflush port is connected to the interface.

[0010] By adopting the above technical solution and setting up components such as air supply pipes, three-way pipes, and three-way valves, the backflushing cleaning function of the filter components inside the sludge press is realized. This design loosens the filter residue through gas backflushing without disassembling the filter screen, reducing the frequency of filter screen clogging and lowering system maintenance costs. At the same time, the liquid generated during the pressing process of the filter residue is directly discharged from the system through the drain port of the three-way pipe, improving liquid treatment efficiency and ensuring continuous operation of the system.

[0011] Optionally, multiple pre-coated filters are provided, and each primary branch pipe corresponds to and is connected to a pre-coated filter. Multiple primary branch pipes converge into the main pipeline, and the main pipeline is connected to the air inlet.

[0012] By adopting the above technical solution, each filter is individually connected to the gas supply system through a primary branch pipe, ensuring that the gas supply for backflushing is more uniform and controllable. By merging multiple branch pipes into the main pipeline, the efficiency of gas distribution is further improved, and the overall backflushing cleaning effect of the system is achieved.

[0013] Optionally, the filter assembly includes a filter plate disposed at the opening end of the cover, a filter cloth placed on top of the filter plate, and a sealing ring pressing the filter cloth, wherein the surface of the filter plate is provided with multiple filter holes.

[0014] Optionally, the slag storage vehicle includes a mobile frame and a vehicle body installed on the upper end of the mobile frame. The lower end of the mobile frame is provided with casters, and a push handle is provided on one side of the vehicle body.

[0015] By adopting the above technical solutions, the mobile design of the slag storage truck makes the collection and cleaning of filter residue more convenient. At the same time, the push handle design of the truck body makes the slag storage truck easy to push and pull, reducing the burden of manual operation and optimizing the discharge process of filter residue.

[0016] Optionally, a liquid outlet is formed at the lower end of the side wall of the vehicle body.

[0017] By adopting the above technical solution, the filtrate accompanying the filter residue can be automatically discharged from the outlet, avoiding secondary pollution caused by the accumulation of liquid in the slag storage vehicle.

[0018] Optionally, the upper end of the movable frame is provided with a pair of first connecting seats, and the vehicle body is provided with a pair of second connecting seats on the same side as the push handle. A fixed rod is fixed between adjacent second connecting seats, and a rotating rod is movably inserted between adjacent first connecting seats. One end of the rotating rod is connected to a wrench, and the other end of the rotating rod is connected to a hook plate for hooking the fixed rod.

[0019] By adopting the above technical solution and through the linkage structure design of the rotating rod, hook plate and fixed rod, the discharge of filtrate becomes simpler.

[0020] Optionally, a tension spring is connected to the lower end of the hook plate, and the other end of the tension spring is connected to the movable frame.

[0021] By adopting the above technical solution, the tension spring improves the stability of the vehicle body when it is reset on the moving frame.

[0022] In summary, the beneficial technical effects of this application are as follows: The precision pre-coated filtration system of this application realizes the back-flushing cleaning function inside the slag press through the air supply pipeline and the three-way pipe, effectively reducing filter screen clogging and maintenance frequency; the drain port design of the three-way pipe ensures that the liquid generated during the slag pressing process can be smoothly discharged, ensuring the continuous operation of the system; the equipped slag storage cart adopts a mobile design and linkage structure, which simplifies the operation of slag collection and filtrate separation, and combined with the automatic reset function, improves the operational safety and system automation level, thereby improving the overall operating efficiency and maintenance convenience of the equipment. Attached Figure Description

[0023] Figure 1 This is a top view of a precision pre-coated filtration system with a slag press backflushing cleaning structure.

[0024] Figure 2 yes Figure 1 A magnified view of part A in the middle.

[0025] Figure 3 This is a schematic diagram of a T-junction.

[0026] Figure 4 This is a partial cross-sectional view of the slag press.

[0027] Figure 5 yes Figure 4 A magnified view of part B in the middle.

[0028] Figure 6 A schematic diagram showing the connection between the slag press and the slag storage vehicle.

[0029] Figure 7 yes Figure 6 A magnified view of part C in the middle.

[0030] Explanation of reference numerals in the attached drawings: 1. Fiber powder pre-coating device; 2. Pre-coated filter; 3. Slag and liquid discharge and recovery device; 4. Slag press; 41. Auxiliary support; 42. Main body; 43. Pressure cap; 431. Interface; 432. Receptacle; 44. Filter assembly; 441. Filter plate; 442. Filter holes; 443. Filter cloth; 444. Sealing ring; 5. Protective shell; 6. Slag storage car; 61. Mobile frame; 611. Casters; 612. First connecting seat; 61 3. Yield area; 62. Vehicle body; 621. Push handle; 622. Liquid outlet; 623. Second connecting seat; 624. Fixed rod; 7. Air supply pipeline; 71. Primary branch pipe; 72. Valve; 73. Secondary branch pipe; 74. Main pipeline; 8. T-pipe; 81. T-valve; 82. Drain outlet; 83. Backflush port; 84. Air inlet; 9. Rotating rod; 91. Wrench; 92. Hook plate; 921. Yield port; 922. Hook hole; 923. Tension spring. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0032] This paper uses a coordinate system XYZ, where the positive direction of the Z-axis represents the top and the negative direction of the Z-axis represents the bottom; the positive direction of the Y-axis represents the front and the negative direction of the Y-axis represents the back; and the positive direction of the X-axis represents the right and the negative direction of the X-axis represents the left.

[0033] This application discloses a precision pre-coated filtration system with a slag press backflushing cleaning structure, as described in the embodiments below. Figure 1 The precision pre-coating filtration system with a slag press backflushing cleaning structure includes a fiber powder pre-coating device 1, multiple pre-coating filters 2, a slag discharge and recovery device 3, and a slag press 4, which are connected sequentially in a conventional operating manner. A protective shell 5 is installed on the outside of the slag press 4. The fiber powder pre-coating device 1, the multiple pre-coating filters 2, and the slag discharge and recovery device 3 are all centrally installed within the equipment frame, while the slag press 4 is installed on the outside of the equipment frame using an auxiliary support 41. The working principle and coordination process of the above equipment are consistent with existing pre-coating filtration systems and will not be described further.

[0034] The precision pre-coated filtration system also includes an air supply pipe 7 for providing compressed air, which is connected to the plant's compressed gas system. The air supply pipe 7 connects to multiple primary branch pipes 71, each corresponding to a pre-coated filter 2. Each primary branch pipe 71 is equipped with a valve 72. Further, finer secondary branch pipes 73 are formed and connected to the primary branch pipes 71, and these secondary branch pipes 73 are also equipped with valves 72. The multiple secondary branch pipes 73 ultimately connect to a new main pipeline 74, which is connected to a tee pipe 8. The tee pipe 8 is partially located within the equipment frame and partially extends out of the equipment frame, connecting to the slag press 4.

[0035] Reference Figures 2 to 4 A three-way valve 81 is installed at the right end of the three-way pipe 8. The left side of the three-way pipe 8 branches into a drain port 82 and a backflush port 83, while the right side of the three-way pipe 8 has an air inlet 84, which is connected to the main pipeline 74. The sludge press 4 includes a main body 42 and a pressure cap 43 that covers the lower opening of the main body 42. The pressure cap 43 is locked to the lower end of the main body 42 using a hydraulic system. A filter assembly 44 is installed inside the pressure cap 43. An interface 431 is connected to the lower end of the pressure cap 43, and the interface 431 is connected to the backflush port 83 of the three-way pipe 8 via a pipe.

[0036] The three-way pipe 8 can realize both backflushing and drainage functions. During the backflushing stage, the pressure cap 43 is kept locked with the main body 42, and the valves 72 and 81 are switched accordingly. Compressed gas enters the system through the gas supply pipe 7, and the gas flows sequentially into the gas supply pipe 7, the first-level branch pipe 71, the second-level branch pipe 73, the main pipe 74, and the three-way pipe 8, and finally enters the slag press 4 through the interface 431. After the gas enters the slag press 4, it generates a reverse airflow, which blows and cleans the filter assembly 44, loosens the filter residue on the filter assembly 44, and facilitates the subsequent slag discharge operation.

[0037] During the drainage stage, keep the pressure cap 43 locked to the main body 42, switch the three-way valve 81, and use the pressure difference in the pipeline to achieve reverse flow of the filtrate in the pressure cap 43. Using the original gas pipeline, the filtrate enters the three-way pipe 8 from the interface 431 at the bottom of the sludge press 4 and flows out from the drain port 82. The drain port 82 is directly connected to the external drainage pipeline, which can discharge the filtrate into an external waste liquid treatment device or a designated container.

[0038] Reference Figure 5 The filter assembly 44 includes a filter plate 441 installed at the open end of the pressure cap 43, with a plurality of filter holes 442 spaced apart on the surface of the filter plate 441. A receiving cavity 432 for receiving filtrate is formed between the filter plate 441 and the inner wall of the pressure cap 43, and the receiving cavity 432 is connected to the interface 431. The filter assembly 44 also includes a filter cloth 443 placed on the upper side of the filter plate 441, and a sealing ring 444 pressing the filter cloth 443, the outer periphery of the sealing ring 444 being tightly fitted to the inner wall of the pressure cap 43.

[0039] Reference Figure 6 and Figure 7 Below the slag press 4 is a slag storage car 6. The slag storage car 6 includes a mobile frame 61 and a car body 62 installed on the mobile frame 61. Universal wheels 611 are installed at the four corners of the mobile frame 61. A push handle 621 is welded to the left end of the car body 62 to facilitate pushing and pulling the car body 62.

[0040] The upper end of the vehicle body 62 is open and aligned with the opening below the sludge press 4. The opening of the vehicle body 62 is tilted downward on the right side, and the lower left end of the vehicle body 62 is connected to the liquid outlet 622. The liquid outlet 622 is located outside the moving frame 61. When the sludge cake falls, it is often accompanied by a small amount of filtrate, which can be discharged through the liquid outlet 622.

[0041] The upper end of the mobile frame 61 is welded with a first connecting seat 612 at the rear and middle. Two second connecting seats 623 are welded at intervals at the lower middle of the left side of the vehicle body 62. A fixed rod 624 is fixedly installed between adjacent second connecting seats 623. A rotatable rotating rod 9 is inserted between the first connecting seats 612. A wrench 91 is fixedly installed at the rear end of the rotating rod 9. The front end of the rotating rod 9 passes through the first connecting seat 612 located in the middle and is fixedly installed with a hook plate 92. The upper end of the hook plate 92 has a clearance opening 921 for the fixed rod 624 to be inserted. The right side of the hook plate 92 protrudes and forms a hook hole 923.

[0042] A clearance area 613 is formed in the middle of the movable frame 61. A tension spring 923 is hooked at the hook hole 922. Another hook ring with a hook hole 922 is welded to the groove wall of the clearance area 613 for the lower end of the tension spring 923 to be hooked. Flip the wrench 91 downward so that the hook plate 92 is disengaged from the fixed rod 624. At this time, the push handle 621 can be held to lift the vehicle body 62, so that the filtrate in the vehicle is automatically discharged from the outlet 622 due to gravity.

[0043] The implementation principle of the precision pre-coated filtration system with a backflushing cleaning structure for a sludge press in this embodiment is as follows: A filter aid is provided to the pre-coated filter 2 via a fiber powder pre-coating device 1, forming a pre-coating layer on the filter element surface for precision liquid filtration. The filtered clean liquid is output, while the filter residue undergoes solid-liquid separation via a sludge-liquid discharge and recovery device 3 to recover usable liquid. Subsequently, the filter residue is conveyed to a sludge press 4 for compression.

[0044] At this time, there is some filtrate in the pressure cap 43. Switch the three-way valve 81 to make the filtrate flow back along the gas pipe and flow out from the drain port 82 of the three-way pipe 8. After the residual liquid is discharged, flip the pressure cap 43 to make it separate from the opening end of the main body 42, and the filter residue will fall into the slag storage car 6 by itself.

[0045] After the system has been working for a certain period of time, the slag press 4 can be backflushed according to actual needs. Similarly, the three-way pipe 8 is used to switch the three-way valve 81 so that compressed gas enters the slag press 4 and backflushes the filter holes 442 and filter cloth 443, so that the residual filter residue is loosened. After the backflushing is completed, the pressure cover 43 can be flipped over so that the loosened filter residue falls into the slag storage car 6 on its own.

[0046] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A precision pre-coated filtration system with a slag press backflushing cleaning structure, characterized in that: It includes a fiber powder pre-coating device (1), a pre-coating filter (2), a slag discharge and recovery device (3), and a slag press (4) connected together, with a slag storage car (6) provided below the slag press (4); It also includes a gas supply pipe (7) for connecting the compressed gas system, wherein a primary branch pipe (71) is connected between the gas supply pipe (7) and the pre-coated filter (2), the primary branch pipe (71) is equipped with a valve (72), and the primary branch pipe (71) is connected to a tee pipe (8); The three-way pipe (8) is connected to the first-level branch pipe (71) at one end as an air inlet (84). A three-way valve (81) is installed at one end of the air inlet (84), and the other end branches to form a backflush port (83) and a drain port (82). The drain port (82) is used to connect to an external drain pipe. The slag press (4) includes a main body (42) and a pressure cover (43). A filter assembly (44) is installed inside the pressure cover (43). A receiving cavity (432) is formed between the filter assembly (44) and the inner wall of the pressure cover (43). An interface (431) is formed at the lower end of the pressure cover (43) and communicates with the receiving cavity (432). The backflush port (83) is connected to the interface (431).

2. The precision pre-coated filtration system with a slag press backflushing cleaning structure according to claim 1, characterized in that: The pre-coated filter (2) is provided in multiple ways. The primary branch pipe (71) corresponds to and is connected to the pre-coated filter (2). Multiple primary branch pipes (71) converge into the main pipeline (74). The main pipeline (74) is connected to the air inlet (84).

3. The precision pre-coated filtration system with a slag press backflushing cleaning structure according to claim 1, characterized in that: The filter assembly (44) includes a filter plate (441) disposed at the opening end of the cover (43), a filter cloth (443) placed on top of the filter plate (441), and a sealing ring (444) pressing the filter cloth (443). The surface of the filter plate (441) is provided with a plurality of filter holes (442).

4. The precision pre-coated filtration system with a slag press backflushing cleaning structure according to claim 3, characterized in that: The slag storage vehicle (6) includes a mobile frame (61) and a vehicle body (62) installed on the upper end of the mobile frame (61). The lower end of the mobile frame (61) is provided with casters (611), and a push handle (621) is provided on one side of the vehicle body (62).

5. The precision pre-coated filtration system with a slag press backflushing cleaning structure according to claim 4, characterized in that: The lower end of the side wall of the vehicle body (62) is formed with a liquid outlet (622).

6. The precision pre-coated filtration system with a slag press backflushing cleaning structure according to claim 5, characterized in that: The upper end of the mobile frame (61) is provided with a pair of first connecting seats (612), and the vehicle body (62) is provided with a pair of second connecting seats (623) on the same side as the push handle (621). A fixed rod (624) is fixed between adjacent second connecting seats (623), and a rotating rod (9) is movably inserted between adjacent first connecting seats (612). One end of the rotating rod (9) is connected to a wrench (91), and the other end of the rotating rod (9) is connected to a hook plate (92) for hooking the fixed rod (624).

7. The precision pre-coated filtration system with a slag press backflushing cleaning structure according to claim 6, characterized in that: The hook plate (92) is connected to a tension spring (923) at its lower end, and the other end of the tension spring (923) is connected to the movable frame (61).

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