Sealed liquid drainage and gas saving device of plate-and-frame filter press

Abstract

The utility model relates to the technical field of plate-and-frame filter presses, in particular to a closed liquid drainage and gas saving device of a plate-and-frame filter press. Comprising an installation support, a pressing plate is installed between a left thrust plate and a right thrust plate, a plurality of filter plates are installed between the pressing plate and the right thrust plate in a pressing mode, and upper liquid outlet holes and liquid outlet holes are formed in the four corners of the filter plates and the positions, corresponding to the right thrust plate, of the right thrust plate respectively. The plate-and-frame filter press is reasonable and compact in structure and convenient to use, the upper liquid outlet holes and the lower liquid outlet holes are respectively formed in the four corners of the filter plate and the right thrust plate at the corresponding positions, so that a plurality of filter plates on the plate-and-frame filter press can be tightly pressed when slurry is filtered; the upper liquid outlet holes and the lower liquid outlet holes in the multiple filter plates can be aligned to form an upper filtrate channel and a lower filtrate channel, and then the filtrate is discharged through the upper filtrate discharging pipe and the lower filtrate discharging pipe, so that the purposes of closed liquid discharging and gas saving are achieved, the device has the characteristics of safety, reliability and smooth filtrate circulation, the operation is convenient, the working efficiency is improved, and the cost is reduced. And the cost and the potential safety hazard are reduced.

Description

Technical Field

[0001] This utility model relates to the field of plate and frame filter press technology, and is a closed-loop liquid discharge and gas-saving device for plate and frame filter presses. Background Technology

[0002] In traditional plate and frame filter presses, the filtrate is discharged through open drain holes on the sides (front and rear) of the filter plates (directly discharged into a slurry tank or collection ditch). Given that the processed slurry reaches temperatures as high as 70°C, and considering the compressed air purging process, a large amount of water mist is generated during discharge, causing the humidity in the plant to rise sharply to 70%, creating an extremely harsh working environment. This high humidity not only causes severe corrosion to the steel structure and various equipment but also poses significant safety hazards, leading to substantial economic losses. Furthermore, due to the open drainage method, the filtrate discharged from the drain holes on both sides of the filter plates carries a large amount of gas, making it impossible to effectively regulate and seal the compressed air blown into the filter plates at the drain holes. This ultimately results in a significant waste of compressed air and low utilization.

[0003] Existing devices also use a method of connecting hoses to the drain holes on the side of the filter plates, but this method also has the following problems: (1) Since there are dozens to hundreds of filter plates on the plate and frame filter press, the workload is relatively large. Every time the filter cloth is replaced, all the hoses must be removed and reconnected after the replacement is completed; (2) Material consumption, hose aging requires regular replacement, and the maintenance cost is relatively high; (3) The hoses are connected by threaded joints. When the pressure is high during feeding, they are prone to bursting, causing personal injury; (4) The hoses are not suitable for slurry media. Slurry wastewater has serious scaling. The hoses will all be scaled and blocked in less than three months. Therefore, developing a closed-loop drainage and air-saving device for plate and frame filter presses has important practical significance. Summary of the Invention

[0004] This utility model provides a closed-loop drainage and gas-saving device for plate and frame filter presses, which overcomes the shortcomings of the prior art. It can effectively solve the problems of existing plate and frame filter presses where the lower filtrate and purging water vapor are discharged through the open side drainage hole during operation, which generates a large amount of water mist, causing equipment corrosion, high cost, easy clogging, and safety hazards to human health.

[0005] The technical solution of this utility model is achieved through the following measures: a plate and frame filter press with closed-loop drainage and gas-saving device, including a mounting bracket, a left thrust plate and a right thrust plate fixed on the left and right sides of the mounting bracket respectively, a clamping plate installed between the left thrust plate and the right thrust plate, and multiple filter plates clamped between the clamping plate and the right thrust plate. Slurry inlet holes are provided in the middle of the filter plates and on the right thrust plates at corresponding positions. Upper outlet holes are provided at the two upper corners of the filter plates and on the right thrust plates at corresponding positions. Lower outlet holes are provided at the two lower corners of the filter plates and on the right thrust plates at corresponding positions.

[0006] The following are further optimizations and / or improvements to the above-mentioned utility model technical solution:

[0007] The filter plate is fixedly connected to the middle of the front side and the middle of the rear side, and the filter plate is mounted on the mounting bracket by the support blocks on both sides.

[0008] The above-mentioned slurry inlet pipe is fixedly connected to the slurry inlet hole of the right thrust plate, the upper filtrate outlet pipe is fixedly connected to the upper filtrate outlet hole of the right thrust plate, and the lower filtrate outlet pipe is fixedly connected to the lower filtrate outlet hole of the right thrust plate.

[0009] An air inlet pipe is fixedly installed on the upper drain pipe of the filtrate. An automatic control regulating valve is fixedly installed on the upper drain pipe of the filtrate between the air inlet pipe and the right thrust plate. An automatic control regulating valve is fixedly installed on the lower drain pipe of the filtrate. A pressure gauge and a valve are fixedly installed on the slurry feed pipe. A drain pipe is fixedly connected to the upper drain pipe of the filtrate. Valves are fixedly installed on the drain pipe and the air inlet pipe, respectively.

[0010] The aforementioned self-regulating valve is either a pneumatic valve or a solenoid valve.

[0011] The aforementioned mounting bracket has a telescopic device fixedly installed on the left side. The telescopic device has a telescopic rod extending to the right, and the right end of the telescopic rod passes through the left thrust plate and is fixedly installed together with the pressure plate.

[0012] The aforementioned telescopic device is a hydraulic cylinder.

[0013] This utility model has a reasonable and compact structure and is easy to use. By providing upper and lower liquid outlet holes at the four corners of the filter plate and the corresponding right thrust plate, multiple filter plates on the plate and frame filter press will be pressed together during slurry filtration. The upper and lower liquid outlet holes on the multiple filter plates will be aligned to form upper and lower filtrate channels. The filtrate will then be discharged through the upper and lower filtrate drain pipes, thereby achieving the purpose of closed drainage and air saving. It has the characteristics of safety, reliability and smooth filtrate flow, which facilitates operation, improves work efficiency, and reduces costs and safety hazards. Attached Figure Description

[0014] Appendix Figure 1This is a schematic diagram of the main structure of the preferred embodiment of the present utility model.

[0015] Appendix Figure 2 This is a side view enlarged structural schematic diagram of the filter plate in this utility model.

[0016] The codes in the attached diagram are as follows: 1 is the mounting bracket, 2 is the left thrust plate, 3 is the right thrust plate, 4 is the clamping plate, 5 is the filter plate, 6 is the slurry inlet, 7 is the upper outlet, 8 is the lower outlet, 9 is the support block, 10 is the slurry feed pipe, 11 is the upper filtrate drain pipe, 12 is the lower filtrate drain pipe, 13 is the air inlet pipe, 14 is the automatic control regulating valve, 15 is the pressure gauge, 16 is the valve, 17 is the drainage pipe, 18 is the telescopic device, and 19 is the telescopic rod. Detailed Implementation

[0017] This utility model is not limited to the following embodiments, and the specific implementation method can be determined according to the technical solution of this utility model and the actual situation.

[0018] In this utility model, for ease of description, the description of the relative positions of the components is based on the appendix to the specification. Figure 1 The layout is described using a diagrammatic method, such as the positional relationships of front, back, top, bottom, left, and right, which are based on the instructions attached. Figure 1 The orientation of the layout is determined by the direction of the map.

[0019] The present invention will be further described below with reference to the embodiments and accompanying drawings:

[0020] As attached Figure 1 , 2 As shown, the plate and frame filter press with closed-loop drainage and air-saving device includes a mounting bracket 1. A left thrust plate 2 and a right thrust plate 3 are fixed on the left and right sides of the mounting bracket 1, respectively. A clamping plate 4 is installed between the left thrust plate 2 and the right thrust plate 3. Multiple filter plates 5 are clamped and installed between the clamping plate 4 and the right thrust plate 3. A slurry inlet hole 6 is provided in the middle of the filter plate 5 and on the right thrust plate 3 at the corresponding position. An upper outlet hole 7 is provided at the two upper corners of the filter plate 5 and on the right thrust plate 3 at the corresponding position. A lower outlet hole 8 is provided at the two lower corners of the filter plate 5 and on the right thrust plate 3 at the corresponding position. The mounting bracket 1 is a square frame with legs fixedly installed at the four corners. One hundred and fourteen to one hundred and eighteen filter plates 5 are pressed and installed between the clamping plate 4 and the right thrust plate 3. Thus, by providing upper liquid outlet holes 7 and lower liquid outlet holes 8 at the four corners of the filter plates 5 and on the corresponding positions of the right thrust plate 3, the multiple filter plates 5 on the plate and frame filter press will be pressed together during slurry filtration. The upper liquid outlet holes 7 and lower liquid outlet holes 8 on the multiple filter plates 5 will be aligned to form upper and lower filtrate channels, thereby achieving the purpose of sealed drainage and air saving. It has the characteristics of safety and reliability and smooth filtrate flow, which facilitates operation, improves work efficiency, and reduces costs and safety hazards.

[0021] The above-mentioned plate and frame filter press can be further optimized and / or improved according to actual needs, including the closed-loop drainage and air-saving device.

[0022] As attached Figure 1 , 2 As shown, support blocks 9 are fixedly connected to the middle of the front side and the middle of the rear side of the filter plate 5, respectively. The filter plate 5 is mounted on the mounting bracket 1 by the support blocks 9 on both sides. In this way, the support blocks 9 serve the purpose of support, and at the same time, when the filter plate 5 needs to be pulled apart for unloading, the support blocks 9 can be held by hand to apply force.

[0023] As attached Figure 1 As shown, a slurry feed pipe 10 is fixedly connected to the slurry inlet 6 of the right thrust plate 3, an upper filtrate drain pipe 11 is fixedly connected to the upper outlet 7 of the right thrust plate 3, and a lower filtrate drain pipe 12 is fixedly connected to the lower outlet 8 of the right thrust plate 3. During slurry filtration, the slurry enters the filter plate 5 through the slurry feed pipe 10, and the filtrate is discharged through the upper filtrate drain pipe 11 and the lower filtrate drain pipe 12 after filtration.

[0024] As attached Figure 1As shown, an air inlet pipe 13 is fixedly installed on the upper drain pipe 11 of the filtrate. A self-regulating valve 14 is fixedly installed on the upper drain pipe 11 between the air inlet pipe 13 and the right thrust plate 3. A self-regulating valve 14 is fixedly installed on the lower drain pipe 12 of the filtrate. A pressure gauge 15 and a valve 16 are fixedly installed on the slurry feed pipe 10. A drain pipe 17 is fixedly connected to the upper drain pipe 11 of the filtrate. Valves 16 are fixedly installed on the drain pipe 17 and the air inlet pipe 13, respectively. In this way, during the compressed air purging and dewatering process, compressed air is purged into the air inlet pipe 13 to purge the filter cake filtered in the filter plate 5. After purging, the air-water mixture is discharged through the lower drain pipe 12 of the filtrate. By extending the lower drain pipe 12 of the filtrate to a water pool outside the plant, the complete closed-loop discharge of the filtrate and the water vapor generated during the purging process of the plate and frame filter press is successfully achieved. During the feeding stage, the self-regulating valve 14 on the filtrate drain pipe 12 automatically opens fully to ensure unobstructed drainage. During the "air blowing" water removal process of the plate and frame filter cake, the self-regulating valve 14 on the filtrate drain pipe 12 can automatically adjust its opening according to a preset program by precisely setting a fixed valve position. When the filter cake in the plate and frame is "air blown" to remove water, the valve 16 on the air inlet pipe 13 opens, and compressed air enters the filter plate 5 through the air inlet pipe 13 to blow the filter cake. After blowing, the water vapor is discharged through the filtrate drain pipe 12. Compressed air enters the filter chamber between the plates and frames through the upper liquid outlet hole 7 at the upper corner of each filter plate 5. The compressed air squeezes the "moisture" in the carbide slag filter cake between the plates and frames, and the filtrate flows into the filtrate drain pipe 12 through the channel formed by the lower liquid outlet hole 8 at the lower corner of each filter plate 5 for sealed discharge. This intelligent control method can significantly increase the compressed air pressure between the filter chambers composed of each filter plate 5, thereby greatly reducing the amount of compressed air used while ensuring the water precipitation effect.

[0025] Depending on the requirements, the self-regulating valve 14 can be a pneumatic valve or a solenoid valve. This facilitates operation.

[0026] As attached Figure 1 As shown, a telescopic device 18 is fixedly installed on the left side of the mounting bracket 1. The telescopic device 18 has a telescopic rod 19 extending to the right. The right end of the telescopic rod 19 passes through the left thrust plate 2 and is fixedly installed together with the pressure plate 4. In this way, the multiple filter plates 5 between the pressure plate 4 and the right thrust plate 3 can be pressed together by the telescopic rod 19.

[0027] If necessary, the telescopic device 18 is a hydraulic cylinder.

[0028] Advantages of this utility model:

[0029] (1) The unique design of this utility model can completely seal and discharge the filtrate and water vapor generated during the purging process of the plate and frame filter press. At the same time, by cleverly adjusting the opening of the filtrate discharge self-control regulating valve 14, the compressed air pressure between the filter chambers composed of each filter plate 5 can be significantly increased, and the amount of compressed air used can be greatly reduced.

[0030] (2) Unlike traditional plate and frame filter presses with open gas and liquid discharge, this utility model adopts a fully enclosed filtration and discharge system. Throughout the filtration process, the gas and liquid are confined within a dedicated channel, completely isolated from the outside air. This design directly addresses the pain point, solving the problem of high humidity in the factory from the source. The gas and liquid no longer escape, and the situation of fogging no longer exists, making the working environment safer and more efficient for workers. The gas and liquid have zero contact with the factory and equipment, avoiding corrosive erosion, extending service life, and reducing maintenance costs. The previously harsh on-site environment has been completely improved, transforming into a clean and orderly modern production space that meets the current high requirements for the production environment.

[0031] (3) Compared with open discharge, by adding a self-regulating valve 14 to the filtrate drain pipe 12 at the bottom of the plate and frame filter cake, the intelligent control method can significantly increase the compressed air pressure between the filter chambers composed of each filter plate 5 by precisely setting the fixed valve position during the "air blowing" water reduction process of the plate and frame filter cake. This ensures the water reduction effect while significantly reducing the amount of compressed air used, achieving efficient energy utilization (energy consumption reduced by 50%) and effective control of production costs. The moisture content of carbide slag is reduced from 45% to 30%, and the amount of compressed air consumed per ton of carbide slag is reduced from 80.5 cubic meters to 40 cubic meters, resulting in a 50% reduction in energy consumption.

[0032] The above technical features constitute the preferred embodiment of this utility model, which has strong adaptability and the best implementation effect. Unnecessary technical features can be added or removed according to actual needs to meet the needs of different situations.

Claims

1. A plate-and-frame filter press closed liquid discharge and air saving device, characterized in that The installation support is provided with a left thrust plate and a right thrust plate fixed on the left side and the right side of the installation support respectively, a pressing plate installed between the left thrust plate and the right thrust plate, a plurality of filter plates tightly installed between the pressing plate and the right thrust plate, a slurry inlet hole respectively arranged on the middle part of the filter plate and the right thrust plate at the corresponding position, an upper liquid outlet hole respectively arranged on the upper two corners of the filter plate and the right thrust plate at the corresponding position, and a lower liquid outlet hole respectively arranged on the lower two corners of the filter plate and the right thrust plate at the corresponding position.

2. The plate and frame filter press closed drainage and air saving device according to claim 1, characterized in that The middle part of the front side and the middle part of the back side of the filter plate are fixedly connected with support blocks, and the filter plate is installed on the installation support through the support blocks on the two sides.

3. The plate and frame filter press closed liquid discharge and air saving device according to claim 1 or 2, characterized in that The slurry inlet hole of the right thrust plate is fixedly connected with a slurry inlet pipe, the upper liquid outlet hole of the right thrust plate is fixedly connected with a filter liquid upper liquid outlet pipe, and the lower liquid outlet hole of the right thrust plate is fixedly connected with a filter liquid lower liquid outlet pipe.

4. The plate and frame filter press closed drainage and air saving device according to claim 3, characterized in that The filter liquid upper liquid outlet pipe is fixedly installed with an air inlet pipe, a self-control regulating valve is fixedly installed on the filter liquid upper liquid outlet pipe between the air inlet pipe and the right thrust plate, a self-control regulating valve is fixedly installed on the filter liquid lower liquid outlet pipe, a pressure gauge and a valve are fixedly installed on the slurry inlet pipe respectively, a drainage pipe is fixedly connected on the filter liquid upper liquid outlet pipe, and a valve is fixedly installed on the drainage pipe and the air inlet pipe respectively.

5. The plate and frame filter press closed drainage and air saving device according to claim 4, characterized in that The self-control regulating valve is a pneumatic valve or an electromagnetic valve.

6. The plate and frame filter press closed drainage and air saving device according to claim 1 or 2 or 4 or 5, characterized in that The left part of the installation support is fixedly installed with a telescopic device, and the telescopic device is provided with a telescopic rod extending to the right, and the right end of the telescopic rod is fixedly installed with the pressing plate through the left thrust plate.

7. The plate and frame filter press closed drainage and air saving device according to claim 3, characterized in that The left part of the installation support is fixedly installed with a telescopic device, and the telescopic device is provided with a telescopic rod extending to the right, and the right end of the telescopic rod is fixedly installed with the pressing plate through the left thrust plate.

8. The plate and frame filter press closed drainage and air saving device according to claim 6, characterized in that The telescopic device is a hydraulic cylinder.

9. The plate and frame filter press closed drainage and air saving device according to claim 7, characterized in that The telescopic device is a hydraulic cylinder.

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