Integrated press water recycling equipment shared by two filter presses and module control program

Abstract

The application discloses a kind of integrated press water circulation equipment and module control program shared by two filter presses, the equipment includes integrated frame, circulating water tank, press water circulation mechanism, integrated frame top, modular controller;Mainly the press water circulation mechanism of two filter presses is integrated, and special modular control device is set, a water tank and part of pipeline are omitted;The circulating water tank is the circulating water tank shared by two filter presses;The press water circulation mechanism is two-in-one press water circulation mechanism, including two sets of high-pressure water pump and water supply pipeline;The modular controller can control press water circulation mechanism according to program;All equipment is assembled in integrated frame, and the equipment is formed.The module control program of the equipment can program control the equipment to provide 1.0MPa pressurized water for the automatic circulation of two filter presses;Solve the technical problems that press water circulation mechanism structure is loose, occupies larger area, floor remote control installation and debugging is inconvenient, is not suitable for two filter presses shared.

Description

Technical Field

[0001] This invention belongs to the technical field of diaphragm filter presses for solid-liquid separation, and relates to an integrated press water circulation device and module control program shared by two diaphragm filter presses. Background Technology

[0002] A filter press is a multi-chamber intermittent pressure filtration device; a diaphragm filter press is a filter press that uses a secondary high-pressure bulging diaphragm to press and dewater the filter cake; it mainly consists of a double beam frame, a filter plate pressing mechanism, a diaphragm filtration mechanism, a pressing water circulation mechanism, a flipping plate liquid receiving mechanism, a pulling plate cake unloading mechanism, a filter cloth cleaning mechanism, and a PLC programmable control system; the filtration process of the diaphragm filter press is as follows: (1) Primary low-pressure static filtration: the feed pump pressurizes the material to 0.6 MPa and inputs it into the multi-chamber, so that pressure is formed on both sides of the filter cloth. (1) Low-pressure static filtration; the filter cloth traps particles in the material to form a filter cake in the filter chamber, and the filtrate flows out through the filter cloth from the outlet hole of the filter chamber; (2) Secondary high-pressure pressing dewatering: high-pressure medium (compressed air below 0.7MPa or high-pressure water above 0.7MPa) is input into the pressing chamber of the diaphragm filter plate, and the bulging membrane presses the filter cake for dewatering; the filter plate is pulled open to achieve gravity unloading of the cake; it is suitable for pressing dewatering solid-liquid separation of various suspension materials (i.e., mixtures of liquid and solid particles) with low filter cake moisture content requirements.

[0003] The press water circulation mechanism mainly consists of a high-pressure water pump, a circulating water tank, a water supply pipeline, and a return water pipeline. The circulating water tank includes a water tank and a level gauge, and has a water inlet, water supply outlet, return outlet, drain outlet, and breather. The water inlet pipeline includes a water supply pipe, a water supply ball valve, a check valve, and a safety valve. The return water pipeline includes a return water pipe and a return water ball valve. The main body of the diaphragm filter press is installed on the second floor, while the press water circulation mechanism is located on the first floor, near the filter press head. The water inlet pipeline connects to the filter press's main press water pipe. The water pump is connected to the PLC control system. The working process of the pressing water circulation mechanism is as follows: Under the control of the PLC control system, after static filtration at a low pressure of 0.6MPa, the high-pressure water pump pumps high-pressure water of 0.7MPa or higher into the pressing chamber of the diaphragm filter plate. The expanded diaphragm plates perform secondary pressing of the filter cake to dewater it, thereby improving the purity of the filter cake and the recovery rate of the filtrate. The filter chamber is automatically locked to maintain the pressing state without depressurization. Pressure-maintaining filtration further reduces the moisture content of the filter cake. After the pressing and dewatering of the filter cake is completed, the pressing water flows back to the circulating water tank.

[0004] The existing pressing water circulation mechanism has the following defects: (1) Each diaphragm filter press has an independent pressing water circulation mechanism. Two diaphragm filter presses cannot share their circulating water tank, resulting in low equipment utilization and high production costs; (2) The pressing water circulation mechanism has a loose structure. The high-pressure water pump, circulating water tank, water supply ball valve, check valve, safety valve, and return water ball valve are installed and scattered all over the ground, occupying a large area; (3) Its programmable control part is installed in the PLC programmable control cabinet on the second floor, far away from the pressing water circulation mechanism. It is inconvenient to install and debug, and the emergency response is slow; it cannot meet the user's requirements for the integration and independent programmable control of the pressing water circulation mechanism. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of existing pressing water circulation mechanisms, and to solve the technical problems of how to integrate the pressing water circulation mechanisms of two diaphragm filter presses into one unit and set up a dedicated modular control device, which are characterized by loose structure, large footprint, inconvenient installation and debugging due to the remote location of the programmable control part from the main body (remote control from different floors), and low utilization rate due to unsuitability for sharing equipment between two diaphragm filter presses. The invention provides an integrated pressing water circulation device and modular control program for two filter presses; the modular control program refers to the modular control program of the integrated pressing water circulation device for two filter presses of this invention, and is abbreviated due to the limited number of characters in the patent title.

[0006] The innovative technical solution adopted by this invention to solve the problems of the prior art is: an integrated press water circulation device for two filter presses (hereinafter referred to as: dual-machine press water circulation device). The key point of the overall technical solution is that, compared with the prior art, its outstanding substantive feature is that it improves the existing two press water circulation mechanisms and their separate programmable parts into a dual-machine press water circulation device, including an integrated frame, a circulating water tank, a press water circulation mechanism, an integrated frame top, and a modular controller; mainly, it integrates the press water circulation mechanisms of two diaphragm filter presses into one unit and sets up a dedicated modular control device; the circulating water tank is a shared circulating water tank for both filter presses; the press water circulation... The ring mechanism is a two-in-one pressing water circulation mechanism, including two sets of high-pressure water pumps and water supply pipelines; the modular controller is connected to a PLC programmable control system and can control the pressing water circulation mechanism according to a program; the circulating water tank, pressing water circulation mechanism and modular controller are all integrated into an integrated frame, forming a dual-machine pressing water circulation equipment. It has a compact structure, quick installation and commissioning, and convenient transportation and use. It can automatically circulate 0.9-1.0MPa pressing water for two diaphragm filter presses; thus, it solves the technical problems of the pressing water circulation mechanism having a loose structure and large footprint, the programmable control part being far from the main body and inconvenient for installation and commissioning, and low utilization rate when shared by two diaphragm filter presses; the specific design scheme of the present invention is described in detail below.

[0007] The integrated frame is a frame-type integrated frame that integrates the dual-machine pressing water circulation equipment into one unit. It includes an integrated frame, a ladder, a water tank cover baffle, an integrated frame bottom beam, an integrated frame bottom plate, and a water pump base. The integrated frame is a cuboid integrated frame, and its size corresponds to the circulating water tank and the pressing water circulation mechanism. The water pump base has eight water pump mounting holes. Four integrated frame bottom beams are welded alternately to the bottom of the integrated frame, the water pump base is welded to the corresponding position on the lower left side of the integrated frame, the integrated frame bottom plate is welded to the integrated frame bottom beam, and the ladder is welded to the left side of the integrated frame to form the integrated frame.

[0008] The circulating water tank is shared by two filter presses and includes tank columns, tank beams, tank cover baffles, tank body, tank cover, tank reinforcing ribs, and level gauges. The tank body is a rectangular tank body that fits into the integrated frame, formed by four tank walls on the front, back, left, and right sides. Its front has inlet flange, outlet flange, supply flange, drain flange, upper level flange, and lower level flange, and is made of stainless steel. The tank cover has a vent and is also made of stainless steel. The four tank columns are located at the four corners of the tank body and welded to the integrated frame. The double tank beams and double tank cover baffles are located on the upper side of the tank body and welded to the integrated frame. Eight tank reinforcing ribs are welded alternately to the outside of the tank walls. The tank cover covers the tank body, and the level gauges are installed on the upper and lower level flanges, forming the circulating water tank.

[0009] The press water circulation mechanism is a two-in-one press water circulation mechanism, including water supply pipeline I, water supply pipeline II, return water pipeline, inlet water pipeline, and high-pressure water pump; (1) The water supply pipeline I and water supply pipeline II are identical in structure and are press water supply pipelines connected to the two filter presses respectively, including water supply pipe, overpressure overflow pipe, water supply check valve, water supply safety valve, pressure sensor, and water supply pneumatic ball valve; the water supply pipe includes the lower section of the right-angle three-way water supply pipe, the middle section of the three-way water supply pipe, and the upper section of the water supply pipe; the overpressure overflow pipe is a three-way overpressure overflow pipe; the water supply check valve is an H44H-16P type check valve; the water supply safety valve ... The system consists of: a full-valve type A41Y-25P safety valve; a pressure sensor type PMP51-AA21JA1SGCGCJA1+AK pressure transmitter; a water supply pneumatic ball valve type Q641F-16P electromagnetic pneumatic ball valve; a water supply check valve installed at the lower end of the lower section of the water supply pipe; a water supply safety valve installed on the tee of the lower section of the water supply pipe; a pressure sensor installed on the water supply safety valve; and a water supply pneumatic ball valve installed between the lower and middle sections of the water supply pipe. The upper section of the water supply pipe connects to the middle section, forming water supply line I or water supply line II. An overpressure overflow pipe connects the water supply safety valves of water supply line I and water supply line II, forming... (1) A water supply pipeline with an overpressure overflow pipe; (2) A return water pipeline, including a return water Z-type pipe, a return water tee pipe, a return water pneumatic ball valve, and a large and small connector; the return water pneumatic ball valve is a Q641F-16P type electromagnetic pneumatic ball valve; the double return water pneumatic ball valves are installed at both ends of the return water tee pipe, and the large and small connectors connect the return water Z-type pipe and the return water tee pipe to form a return water pipeline; (3) A water inlet pipeline, which is a pump inlet water pipeline, including a double tee type water inlet pipe, a large and small connector, and a water inlet manual butterfly valve; the water inlet manual butterfly valve is a D671X-16P type normally open manual butterfly valve, which is closed when the press water circulation mechanism is under maintenance; the double large and small connectors are divided into (3) Connect the two ends of the double three-way water inlet pipe, and install the double manual butterfly valves on the double large and small joints to form the water inlet pipe; (4) The high-pressure water pump is a CDMF-CDN15-13 type variable frequency high-pressure water pump; (5) The connection relationship of the main components is: the water inlet pipe is connected to the suction end of the double high-pressure water pump, the water supply pipe I and the water supply pipe II are respectively connected to the water delivery end of the double high-pressure water pump, the three-way overpressure overflow pipe is connected to the water supply safety valve of the water supply pipe I and the water supply pipe II, the double three-way water inlet pipe of the water inlet pipe, and the return water pipe is connected to the middle section of the three-way water supply pipe of the water supply pipe I and the water supply pipe II to form the pressing water circulation mechanism.

[0010] The integrated frame top is a herringbone integrated frame top, including an integrated frame top frame and an integrated frame top plate; the integrated frame top frame is a rectangular frame-type integrated frame top frame, the width of which is equal to the width of the integrated frame, and the length of which is greater than the length of the integrated frame; the integrated frame top plate is an integrated frame top plate that cooperates with the integrated frame top frame, and one end of which has double water supply pipe holes; the integrated frame top plate is welded to the integrated frame top frame to form the integrated frame top.

[0011] The modular controller is a press water circulation (water supply and return) controller, connected to a PLC programmable control system. It can process the information from the pressure sensor according to the program and control the switching of the high-pressure water pump, the water supply pneumatic ball valve and the water return pneumatic ball valve in response to changes in the situation.

[0012] The connection relationship of the main components of the present invention is as follows: For ease of explanation, the main pipe of the press water and the PLC program control system closely related to the present invention are added; (1) Assembly of the present invention: The circulating water tank is built into the right side of the integrated frame (according to the orientation of the main view of the filter press), the press water circulation mechanism is built into the pump seat on the left side of the integrated frame, the modular controller is installed on the right side of the circulating water tank, the top of the integrated frame is installed on the integrated frame, the high pressure pump, pressure sensor, water supply pneumatic ball valve, and water return pneumatic ball valve are respectively connected to the modular controller, the water supply pneumatic ball valve and the water return pneumatic ball valve are normally closed, forming a dual-machine press water circulation device; (2) General assembly of the present invention: The main bodies of the dual diaphragm filter press are installed side by side on the second floor, the dual-machine press water circulation device is placed on the first floor, near the middle of the head of the dual diaphragm filter press, the water supply pipeline I and the water supply pipeline II are respectively connected to the press water main pipe of the dual diaphragm filter press, and the modular controller is connected to the PLC program control system.

[0013] This invention also provides a modular control program, namely the modular control program of the integrated pressing water circulation equipment shared by the two filter presses of this invention: Under the joint control of the PLC programmable control system and the modular controller, (1) pressing water is provided: After the diaphragm filter mechanism completes the 0.6MPa low-pressure static filtration, the PLC programmable control system transmits the information of the completion of the low-pressure filtration process of the diaphragm filter mechanism to the modular controller. The modular controller promptly controls the two high-pressure water pumps to start automatically in sequence (or start synchronously), and automatically opens the water supply pneumatic ball valve to pump the 0.9-1.0MPa high-pressure water into the pressing chamber of the diaphragm filter plate of the two diaphragm filter presses, and the secondary pressing of the filter cake by the expanded membrane sheet for dewatering, so as to (2) Pressure holding filtration: When the pressing water pressure reaches 1.0MPa, the pressure sensor immediately transmits the critical pressure information to the modular controller. The modular controller promptly controls the high-pressure water pump to stop and the water supply pneumatic ball valve to close, automatically locking the filter chamber to maintain the pressing state without pressure release. Pressure holding filtration further reduces the moisture content of the filter cake. (3) Pressing water return: After the pressing filter cake is dehydrated (after the filtrate is dried), the PLC program control system transmits the information that the pressing and dehydration process of the diaphragm filter mechanism is completed to the modular controller. The modular controller promptly controls the automatic opening of the return water pneumatic ball valve, and the pressing water in the pressing chamber of the diaphragm filter plate flows back to the circulating water tank.

[0014] The integrated press water circulation equipment and modular control program for two filter presses provided by this invention have the following outstanding features and significant advancements: It improves the existing two-set press water circulation mechanisms and their separate programmable parts, which cannot be shared by two filter presses, into an integrated modular control press water circulation equipment shared by two filter presses. This solves the technical problems of loose structure and large footprint of the press water circulation mechanism, inconvenient installation and debugging of the programmable part located far from the main body, and low equipment utilization rate due to incompatibility with two diaphragm filter presses. It eliminates one circulating water tank and some pipelines, saving floor space, improving the convenience of installation and debugging, facilitating transportation and use, and reducing manufacturing costs. It fills the gap in modular control of press water circulation equipment for diaphragm filter presses in my country, achieving significant cost reduction and efficiency improvement. Attached Figure Description

[0015] Figure 1 This is a three-dimensional schematic diagram (front left direction) of the dual-machine pressing water circulation device of the present invention.

[0016] Figure 2 This is a three-dimensional schematic diagram (front right direction) of the dual-machine pressing water circulation device of the present invention.

[0017] Figure 3 This is a three-dimensional schematic diagram of the connection between the pressing water circulation mechanism and the circulating water tank of the dual-machine pressing water circulation equipment of the present invention (including pressing water circulation diagram → water supply, ← water return).

[0018] Figure 4 This is a three-dimensional schematic diagram of the integrated frame and water tank column of the dual-machine pressing water circulation equipment of the present invention.

[0019] Figure 5 This is a three-dimensional schematic diagram of the circulating water tank and integrated frame base plate of the dual-machine pressing water circulation device of the present invention.

[0020] Figure 6 This is a three-dimensional schematic diagram of the integrated frame top of the dual-machine pressing water circulation device of the present invention.

[0021] Figure 7 This is a three-dimensional schematic diagram of the water circulation mechanism of the dual-machine pressing water circulation device of the present invention.

[0022] Figure 8 This is a side view schematic diagram of the pressing water circulation mechanism of the dual-machine pressing water circulation device of the present invention.

[0023] Figure 9 This is a three-dimensional schematic diagram of the connection between the water inlet pipeline, water supply pipeline and high-pressure water pump of the dual-machine pressing water circulation equipment of the present invention (excluding the return water pipeline and the overpressure overflow pipe).

[0024] Figure 10 This is a three-dimensional schematic diagram of the return water pipeline of the dual-machine pressing water circulation equipment of the present invention.

[0025] Figure 11 This is a three-dimensional schematic diagram of the overpressure overflow pipe of the dual-machine pressing water circulation equipment of the present invention.

[0026] Figure 12 This is a schematic diagram of the modular controller surface panel of the dual-machine pressing water circulation equipment of the present invention.

[0027] Figure 13 This is a schematic diagram of the internal wiring board of the modular controller of the dual-machine pressing water circulation equipment of the present invention.

[0028] Figure 14 This is a wiring diagram of the modular controller for the dual-machine pressing water circulation equipment of the present invention.

[0029] Figure 15 This is a schematic diagram of the main assembly of the dual-machine pressing water circulation equipment and two diaphragm filter presses of the present invention.

[0030] Figure 16 This is a side view schematic diagram of the assembly of the dual-machine pressing water circulation equipment and two diaphragm filter presses of the present invention.

[0031] Reference numerals: 1-Integrated frame, 2-Circulating water tank, 3-Pressed water circulation mechanism, 4-Integrated frame top, 5-Modular controller, 6-Level gauge, 7-Integrated frame, 8-Ladder, 9-Water tank column, 10-Water tank beam, 11-Water tank cover baffle, 12-Integrated frame bottom beam, 13-Integrated frame bottom plate, 14-Water pump base, 15-Water tank body, 16-Water tank cover, 17-Water inlet flange, 18-Water return flange, 19-Water supply flange, 20-Drain flange, 21-Upper level flange, 22-Lower level flange, 23-Water tank wall, 24-Water tank reinforcing rib, 25-Breath port, 26-Integrated frame top frame, 27-Integrated frame top plate, 28-Water supply pipeline Ⅰ, 29-Water supply pipeline Ⅱ, 30-Return water pipeline, 31-Overpressure overflow pipe, 32-Inlet water pipeline, 33-Large and small connectors, 34-Inlet manual butterfly valve, 35-High pressure water pump, 36-Water supply check valve, 37-Water supply safety valve, 38-Lower section of water supply pipe, 39-Pressure sensor, 40-Water supply pneumatic ball valve, 41-Middle section of water supply pipe, 42-Upper section of water supply pipe, 43-Inlet overflow flange, 44-Return water Z-type pipe, 45-Return water tee, 46-Return water pneumatic ball valve, 47-Diaphragm filter plate, 48-Main press water pipe, 49-PLC programmable control system, 50-Dual-machine press water circulation equipment (this invention), 51-Diaphragm filter press (hereinafter referred to as filter press).

[0032] Water supply pipelines, including 28-water supply pipeline I, 29-water supply pipeline II, and 31-overpressure overflow pipe. Detailed Implementation

[0033] The technical solutions of the present invention will be described below with reference to the accompanying drawings of the integrated pressing water circulation device and modular control program embodiment shared by two filter presses. The described embodiments are only a part of the preferred embodiments of the present invention, and not all of the embodiments. All other embodiments without inventiveness made by those skilled in the art based on the embodiments of the present invention, such as dual-machine pressing water circulation devices with the same integrated and modular control methods and similar structures, are within the protection scope of the present invention.

[0034] Example 1

[0035] An integrated press water circulation device 50 (hereinafter referred to as a dual-machine press water circulation device) shared by two filter presses has the following innovative overall implementation: The existing two press water circulation mechanisms and their separate programmable control units are improved into a dual-machine press water circulation device 50, including an integrated frame 1, a circulating water tank 2, a press water circulation mechanism 3, an integrated frame top 4, and a modular controller 5. The main feature is the integration of the press water circulation mechanisms of the two diaphragm filter presses 51 into one unit, with a dedicated modular control device. The circulating water tank 2 is a shared circulating water tank for both diaphragm filter presses 51. The press water circulation mechanism 3 is a two-in-one press water circulation mechanism, including two sets of high-pressure water pumps. 35 and water supply pipeline; the modular controller 5, connected to the PLC programmable control system 49, can control the pressing water circulation mechanism 3 according to the program; the circulating water tank 2, the pressing water circulation mechanism 3 and the modular controller 5 are all integrated in the integrated frame 1 to form a dual-machine pressing water circulation equipment 50, which has a compact structure, quick installation and commissioning, and convenient transportation and use. It can automatically provide pressing water of 0.9-1.0MPa for two diaphragm filter presses 51; thus, it solves the technical problems of the loose structure of the pressing water circulation mechanism occupying a large area, the programmable part being far away from the main body of the equipment making installation and commissioning inconvenient, and the inability to be shared by two diaphragm filter presses 51, resulting in low equipment utilization; the specific implementation plan is described in detail below.

[0036] The integrated frame 1 is a frame-type integrated frame 1 that integrates the dual-machine pressing water circulation equipment 50 into one unit. It includes an integrated frame 7, a ladder 8, a water tank cover baffle 11, an integrated frame bottom beam 12, an integrated frame bottom plate 13, and a water pump seat 14. The integrated frame 7 is a cuboid integrated frame 7, and its size corresponds to the circulating water tank 2 and the pressing water circulation mechanism 3. The water pump seat 14 has eight water pump mounting holes. Four integrated frame bottom beams 12 are welded alternately to the bottom of the integrated frame 7, the water pump seat 14 is welded to the corresponding position on the left side of the bottom of the integrated frame 7, the integrated frame bottom plate 13 is welded to the integrated frame bottom beams 12, and the ladder 8 is welded to the left side of the integrated frame 7 to form the integrated frame 1. It is used for the containerized built-in dual-machine pressing water circulation equipment 50 to reduce the floor space and improve the convenience of equipment transportation and on-site installation.

[0037] The circulating water tank 2 is shared by two diaphragm filter presses 51, and includes a tank column 9, a tank beam 10, a tank cover baffle 11, a tank body 15, a tank cover 16, a tank reinforcing rib 24, and a level gauge 6. The tank body 15 is a rectangular tank body 15 that mates with the integrated frame 1, and is surrounded by four tank walls 23 on the front, back, left, and right sides. Its front has a water inlet flange 17, a water return flange 18, a water supply flange 19, a drain flange 20, an upper level flange 21, and a lower level flange 22, and is made of stainless steel. The tank cover 16 has a vent 25 and is made of stainless steel. The four tanks... Columns 9 are located at the four corners of the main body 15 of the water tank and are welded to the integrated frame 7. The double water tank beams 10 and the double water tank cover baffles 10 are located on the upper side of the main body 15 of the water tank and are welded to the integrated frame 7. Eight water tank reinforcing ribs 24 are welded alternately to the outside of the water tank wall 23. The water tank cover 16 covers the main body 15 of the water tank. The level gauge 6 is installed on the upper level flange 17 and the lower level flange 18 to form the circulating water tank 2. The circulating water tank 2 is built into the right part of the integrated frame 1 (according to the orientation of the main view of the filter press 51) and is used to store the circulating water for pressing for the two diaphragm filter presses 51. One circulating water tank 2 is omitted, the floor space is reduced, and the manufacturing cost is reduced.

[0038] The pressing water circulation mechanism 3 is a two-in-one pressing water circulation mechanism 3, including water supply pipeline I 28, water supply pipeline II 29, return water pipeline 30, inlet water pipeline 32, and high-pressure water pump 35; (1) The water supply pipeline I 28 and water supply pipeline II 29 are identical in structure and are pressing water supply pipelines connected to two filter presses 51 respectively, including water supply pipe, overpressure overflow pipe 31, water supply check valve 36, water supply safety valve 37, pressure sensor 39, and water supply pneumatic ball valve 40; the water supply pipe includes a right-angle three-way water supply pipe lower section 38, a three-way water supply pipe middle section 41, and a water supply pipe upper section 42; the overpressure overflow pipe 31 is a three-way overpressure overflow pipe 31; the water supply check valve 36 is an H44H-16P type check valve; Water safety valve 37 is an A41Y-25P type safety valve; pressure sensor 39 is a PMP51-AA21JA1SGCGCJA1+AK type pressure transmitter; water supply pneumatic ball valve 40 is a Q641F-16P type electromagnetic pneumatic ball valve; water supply check valve 36 is installed at the lower end of the lower section 38 of the water supply pipe; water supply safety valve 37 is installed on the tee of the lower section 38 of the water supply pipe; pressure sensor 39 is installed on the water supply safety valve 37; water supply pneumatic ball valve 40 is installed between the lower section 38 and the middle section 41 of the water supply pipe; the upper section 42 of the water supply pipe is connected to the middle section 41 of the water supply pipe, forming water supply pipeline I 28 or water supply pipeline II 29; overpressure overflow pipe 31 connects the water supply safety of water supply pipeline I 28 and water supply pipeline II 29. Valve 37 forms a water supply pipeline with an overpressure overflow pipe; (2) The return water pipeline 30 includes a return water Z-type pipe 44, a return water tee pipe 45, a return water pneumatic ball valve 46, and a large and small connector 33; the return water pneumatic ball valve is a Q641F-16P type electromagnetic pneumatic ball valve; the double return water pneumatic ball valves 46 are respectively installed at both ends of the return water tee pipe 45, and the large and small connectors 33 connect the return water Z-type pipe 44 and the return water tee pipe 45 to form the return water pipeline 30; (3) The inlet water pipeline 32 is a pump inlet water pipeline, including a double tee inlet pipe, a large and small connector 33, and an inlet manual butterfly valve 34; the inlet manual butterfly valve 34 is a D671X-16P type normally open manual butterfly valve, which is closed when the press water circulation mechanism 3 is under maintenance; the double large and small connectors 33 are divided into Do not connect the two ends of the double three-way water inlet pipe, the double water inlet manual butterfly valve 34 is installed on the double large and small joints 33 respectively to form the water inlet pipe 32; (4) The high pressure water pump 35 is a CDMF-CDN15-13 type variable frequency high pressure water pump; (5) The connection relationship of the main components is: the water inlet pipe 32 is connected to the suction end of the double high pressure water pump 35, the water supply pipe I 28 and the water supply pipe II 29 are respectively connected to the water delivery end of the double high pressure water pump 35, the three-way overpressure overflow pipe 31 is connected to the water supply safety valve 37 of the water supply pipe I 28 and the water supply pipe II 28, the double three-way water inlet pipe of the water inlet pipe 32, and the return water pipe 30 is connected to the middle section 41 of the three-way water supply pipe of the water supply pipe I 28 and the water supply pipe II 29 to form the pressing water circulation mechanism 3;The pressing water circulation mechanism 3 is built into the water pump seat on the left side of the integrated frame 1, and is used to automatically provide pressing circulating water for the two diaphragm filter presses 51.

[0039] The integrated frame top 4 is a herringbone integrated frame top 4, including an integrated frame top frame 26 and an integrated frame top plate 27; the integrated frame top frame 26 is a rectangular frame type integrated frame top frame 26, the width of which is equal to the width of the integrated frame 1, and the length of which is greater than the length of the integrated frame 1; the integrated frame top plate 27 is an integrated frame top plate 27 that cooperates with the integrated frame top frame 26, and one end of which has a double water supply pipe hole; the integrated frame top plate 27 is welded to the integrated frame top frame 26 to form the integrated frame top 4; the integrated frame top 4 is installed on the integrated frame 1 for dust and water protection (to prevent filter cloth cleaning liquid from splashing onto the pressing water circulation mechanism 3 and the modular controller 5).

[0040] The modular controller 5 is a press water circulation (water supply and return) controller. The modular controller 5 is installed on the right side of the circulating water tank 2 and is connected to the PLC programmable control system 49. It is used to process the information of the pressure sensor 39 according to the program and control the high-pressure water pump 35, the water supply pneumatic ball valve 40 and the return water pneumatic ball valve 46 to switch on and off as needed.

[0041] The assembly of this invention includes, for ease of explanation, a diaphragm filter plate 47, a press water main pipe 48, and a PLC control system 49, all closely related to this invention. The main bodies of the double diaphragm filter press 51 are installed side-by-side on the second floor. The double-machine press water circulation equipment 50 is located on the first floor, near the middle of the machine head of the double diaphragm filter press 51. Water supply pipes I 28 and II 29 are respectively connected to the press water main pipe 48 of the double diaphragm filter press 51. Press water can enter the pressing chamber of the diaphragm filter plate 47 through the press water main pipe 48 and rows of press water branch pipes. The high-pressure water pump 35, pressure sensor 39, water supply pneumatic ball valve 40, and water return pneumatic ball valve 46 are respectively connected to the modular controller 5. The water supply pneumatic ball valve 40 and the water return pneumatic ball valve 46 are normally closed. The modular controller 5 is connected to the PLC control system 49.

[0042] The integrated press water circulation device 50 shared by two filter presses provided by this invention has the following outstanding substantive features and significant progress: it improves the existing two sets of press water circulation mechanisms and their separate programmable parts that cannot be shared by two filter presses 51 into an integrated modular control press water circulation device 50 shared by two filter presses. This solves the technical problems of loose structure and large footprint of press water circulation mechanism, inconvenient installation and debugging of programmable parts far away from the main body of equipment, and low equipment utilization rate due to incompatibility with sharing two diaphragm filter presses 51. It omits one circulating water tank 2 and some pipelines, saving floor space, improving the convenience of installation and debugging, facilitating transportation and use, reducing manufacturing costs, meeting the user's need for integrated and independent programmable control of press water circulation mechanism 3, reducing costs and increasing efficiency, and achieving significant technical effects.

[0043] Example 2

[0044] A modular control program, namely the modular control program of the integrated pressing water circulation equipment 50 shared by two filter presses of the present invention: Under the joint control of the PLC programmable control system 49 and the modular controller 5, (1) pressing water is provided: After the diaphragm filter mechanism completes the 0.6MPa low-pressure static filtration, the PLC programmable control system 49 transmits the information that the low-pressure filtration process of the diaphragm filter mechanism is completed to the modular controller 5. The modular controller 5 promptly controls the two high-pressure water pumps 35 to start automatically in sequence (or start synchronously), and automatically opens the water supply pneumatic ball valve 40 to pump the 0.9-1.0MPa high-pressure water into the pressing chamber of the diaphragm filter plate 47 of the two diaphragm filter presses 51, and the expanded membrane sheet to press the filter cake for secondary pressing and dewatering, so as to improve the efficiency of pressing water. (2) Pressure holding filtration: When the pressing water pressure reaches 1.0MPa, the pressure sensor 5 immediately transmits the pressure critical information to the modular controller 5. The modular controller 5 promptly controls the high pressure water pump 35 to stop and the water supply pneumatic ball valve 40 to close, automatically locking the filter chamber to maintain the pressing state without pressure release. Pressure holding filtration further reduces the moisture content of the filter cake. (3) Pressing water return: After the pressing filter cake is dehydrated (after the filtrate is dried), the PLC program control system 49 transmits the information that the pressing and dehydration process of the diaphragm filter mechanism is completed to the modular controller 5. The modular controller 5 promptly controls the automatic opening of the return water pneumatic ball valve 46, and the pressing water in the pressing chamber of the diaphragm filter plate 47 flows back to the circulating water tank 2.

[0045] The modular control program provided by this invention, namely the modular control program of the integrated press water circulation equipment 50 shared by two filter presses, has the following advantages: It improves the existing two sets of press water circulation mechanisms and their separate programmable parts that cannot be shared by two filter presses 51 into an integrated modular control press water circulation equipment 50 shared by two filter presses. This solves the technical problems of loose structure and large footprint of press water circulation mechanism, inconvenient installation and debugging of programmable parts far away from the main body of equipment, and low equipment utilization rate due to incompatibility with sharing by two diaphragm filter presses 51. It omits one circulating water tank 2 and some pipelines, saving floor space, improving the convenience of installation and debugging, improving the level of fully automated control, facilitating transportation and use, reducing manufacturing costs, meeting the user's need for integrated and remote control of press water circulation mechanism 3, filling the gap in modular control of press water circulation equipment of diaphragm filter press 51 in my country, reducing costs and increasing efficiency, and achieving significant technical effects.

Claims

1. An integrated press water circulation device shared by two filter presses, comprising an integrated frame, a circulating water tank, a press water circulation mechanism, an integrated frame top, and a modular controller; characterized in that: The integrated frame is a frame-type integrated frame that integrates the dual-machine pressing water circulation equipment into one unit, including an integrated frame, ladder, water tank cover baffle, integrated frame bottom beam, integrated frame bottom plate, and water pump base; the circulating water tank is a circulating water tank shared by the two filter presses, including a water tank column, water tank beam, water tank cover baffle, water tank body, water tank cover, water tank reinforcing ribs, and level gauge; the pressing water circulation mechanism is a two-in-one pressing water circulation mechanism, including water supply pipeline I, water supply pipeline II, return water pipeline, inlet water pipeline, and high pressure... The water pump has an inlet pipe connected to the suction end of the dual high-pressure water pump. Water supply pipes I and II are respectively connected to the delivery end of the dual high-pressure water pump. Water supply pipes I and II have the same structure and are pressing water supply pipes connected to the two filter presses respectively. They include a water supply pipe, an overpressure overflow pipe, a water supply check valve, a water supply safety valve, a pressure sensor, and a water supply pneumatic ball valve. The water supply pipe includes a lower section, a middle section, and an upper section of a right-angle three-way water supply pipe. The overpressure overflow pipe is a three-way overpressure overflow pipe. A water supply check valve is installed at the lower end of the lower section of the water supply pipe; a water supply safety valve is installed on the tee of the lower section of the water supply pipe; a pressure sensor is installed on the water supply safety valve; a water supply pneumatic ball valve is installed between the lower section and the middle section of the water supply pipe; the upper section of the water supply pipe connects to the middle section; a tee-type overpressure overflow pipe connects the water supply safety valves of water supply pipe I and water supply pipe II, and the double tee-type inlet pipe of the inlet pipe; the return water pipe connects the tee-type middle section of the water supply pipe of water supply pipe I and water supply pipe II; the return water... The pipeline includes a return water Z-type pipe, a return water tee pipe, a return water pneumatic ball valve, and large and small connectors; the double return water pneumatic ball valves are respectively installed at both ends of the return water tee pipe, and the large and small connectors connect the return water Z-type pipe and the return water tee pipe to form the return water pipeline; its inlet pipeline is a pump pre-pump suction pipeline, including a double tee inlet pipe, large and small connectors, and an inlet manual butterfly valve; the double large and small connectors are respectively connected to both ends of the double tee inlet pipe, and the double inlet manual butterfly valves are respectively installed on the double large and small connectors to form the inlet pipeline; The system comprises a pressing water circulation mechanism; the integrated frame top is a herringbone-shaped integrated frame top, including an integrated frame top frame and an integrated frame top plate; the modular controller is a pressing water circulation controller, connected to a PLC programmable control system, capable of processing pressure sensor information according to a program and controlling the switching of the high-pressure water pump, water supply pneumatic ball valve, and water return pneumatic ball valve in response to changes in the system; the circulating water tank is a rectangular tank body that cooperates with the integrated frame, surrounded by four tank walls on the front, back, left, and right sides; the interconnection is as follows: the circulating water tank is built into the right side of the integrated frame, the pressing water circulation mechanism is built into the water pump seat on the left side of the integrated frame, the modular controller is installed on the right side of the circulating water tank, the integrated frame top is installed on the integrated frame, the high-pressure water pump, pressure sensor, water supply pneumatic ball valve, and water return pneumatic ball valve are respectively connected to the modular controller, the water supply pneumatic ball valve and the water return pneumatic ball valve are normally closed, forming this integrated pressing water circulation equipment, which can automatically circulate 0.9-1.0MPa pressing water for two diaphragm filter presses.

2. The integrated press water circulation equipment shared by two filter presses according to claim 1, characterized in that: The integrated frame is a cuboid integrated frame, the size of which corresponds to the circulating water tank and the pressing water circulation mechanism; the water pump seat has eight water pump mounting holes; four integrated frame bottom beams are welded alternately to the bottom of the integrated frame, the water pump seat is welded to the corresponding position on the left side of the bottom of the integrated frame, the integrated frame bottom plate is welded to the integrated frame bottom beams, and the ladder is welded to the left side of the integrated frame to form the integrated frame.

3. The integrated press water circulation device shared by two filter presses according to claim 1, characterized in that: The circulating water tank has a water inlet flange, a water outlet flange, a water supply flange, a drain flange, an upper liquid level flange, and a lower liquid level flange, all made of stainless steel. The tank cover has a vent and is also made of stainless steel. Four tank columns are located at the four corners of the tank body and welded to the integrated frame. Double tank beams and double tank cover baffles are located on the upper side of the tank body and welded to the integrated frame. Eight tank reinforcing ribs are welded alternately to the outside of the tank wall. The tank cover is placed over the tank body. Liquid level gauges are installed on the upper and lower liquid level flanges, forming the circulating water tank.

4. The integrated press water circulation device shared by two filter presses according to claim 1, characterized in that: The water supply check valve is an H44H-16P type; the water supply safety valve is an A41Y-25P type; the pressure sensor is a PMP51-AA21JA1SGCGCJA1+AK type pressure transmitter; the water supply pneumatic ball valve is a Q641F-16P type electromagnetic pneumatic ball valve; the return water pneumatic ball valve is a Q641F-16P type electromagnetic pneumatic ball valve; the inlet manual butterfly valve is a D671X-16P type normally open manual butterfly valve; and the high-pressure water pump is a CDMF-CDN15-13 type variable frequency high-pressure water pump.

5. The integrated press water circulation device shared by two filter presses according to claim 1, characterized in that: The integrated frame top is provided with an integrated frame top frame, which is a rectangular frame type integrated frame top frame. Its width is equal to the width of the integrated frame, and its length is greater than the length of the integrated frame. The integrated frame top plate is an integrated frame top plate that cooperates with the integrated frame top frame, and has two water supply pipe holes at one end. The integrated frame top plate is welded to the integrated frame top frame to form the integrated frame top.

6. A module control program, namely the module control program for the integrated pressing water circulation equipment shared by two filter presses as described in claim 1: characterized in that: Under the joint control of the PLC programmable control system and the modular controller, the first step is to provide pressing water: After the diaphragm filter mechanism completes the 0.6MPa low-pressure static filtration, the PLC programmable control system transmits the information that the low-pressure filtration process of the diaphragm filter mechanism is complete to the modular controller. The modular controller promptly controls the two high-pressure water pumps to start automatically in sequence and automatically open the water supply pneumatic ball valve, pumping high-pressure water of 0.9-1.0MPa into the pressing chamber of the diaphragm filter plate of the two diaphragm filter presses, and the expanded membrane sheets to press the filter cake for secondary pressing and dewatering, so as to improve the purity of the filter cake and the recovery rate of the filtrate; the second step is to maintain pressure. Filtration: When the pressing water pressure reaches 1.0MPa, the pressure sensor immediately transmits the critical pressure information to the modular controller. The modular controller promptly controls the high-pressure water pump to stop and the water supply pneumatic ball valve to close, automatically locking the filter chamber to maintain the pressing state without pressure release. Pressure-maintaining filtration further reduces the moisture content of the filter cake. Third step, pressing water return: After the pressing filter cake is dehydrated, the PLC programmable control system transmits the information that the pressing and dehydration process of the diaphragm filter mechanism is completed to the modular controller. The modular controller promptly controls the automatic opening of the return water pneumatic ball valve, and the pressing water in the pressing chamber of the diaphragm filter plate flows back to the circulating water tank.

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