Primary plate frame squeezing device for iron phosphate production

Abstract

The utility model discloses a first-stage plate-and-frame squeezing device for iron phosphate production. The first-stage plate-and-frame squeezing device comprises a plurality of water supply systems, a plurality of plate-and-frame filter presses, a water supply parallel pipe, a water return parallel pipe, a plurality of pressure transmitters and a display, each water supply system is at least respectively communicated with the plate-and-frame filter presses which are arranged in pairs through pipelines; the water return pipe of each water supply system is connected in parallel with the water return parallel pipe; the water outlet pipe of each water supply system is connected in parallel with the water supply parallel pipe. The plate and frame extruders sharing the same water supply system are respectively connected with the other water supply systems of the same level in parallel, so that the water pressure required by at least any plate and frame extruder is effectively improved, the pressure required by extrusion is improved, the plate and frame extruders in the same water supply system can simultaneously extrude, and the treatment efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of iron phosphate production, in particular to a first-stage plate-frame pressing device for iron phosphate production. Background Art

[0002] During the production process of iron phosphate, the obtained iron phosphate slurry needs to be subjected to at least one stage of plate-frame pressure filtration. To improve production efficiency, multiple first-stage plate-frame pressure filtration devices are set up. Through plate-frame pressure filtration, the excess liquid in the slurry can be removed, and the solid-liquid ratio of the slurry is reduced from 85% to 50% to obtain a filter cake. The filter cake is transported to the next process section through a conveyor belt arranged below the plate-frame filter press and enters the subsequent production.

[0003] During the extrusion process, it is mainly processed by a plate-frame filter press. The plate-frame filter press injects circulating extrusion water into the extrusion frame according to the extrusion needs to uniformly apply an extrusion force to the slurry and achieve the effect of uniform extrusion.

[0004] The extrusion water station provides extrusion water for the extrusion plate frames. In the existing extrusion water station, two extrusion plate frames share a water supply system, resulting in the inability of the two plate frames sharing the same water supply system to perform extrusion operations simultaneously. It is necessary to wait for another plate frame to complete the pressure filtration before proceeding with the operation, and the plate frames are pressed in the waiting queue order, resulting in low plate frame operation efficiency.

[0005] When a squeezing water pump fails, the existing pipeline connection structure will also cause the other two plate frames of the same level to not be able to squeeze normally, affecting production efficiency and production load.

[0006] The information disclosed in the background art section is only intended to increase the understanding of the overall background of the present utility model and should not be regarded as an admission or any form of implication that this information constitutes the prior art already known to those of ordinary skill in the art. Summary of the Utility Model

[0007] The present application provides a first-stage plate-frame pressing device for iron phosphate production, which realizes the parallel connection of multiple plate-frame filter presses and enables each plate-frame filter press to perform extrusion work separately.

[0008] The present application provides a first-stage plate-frame pressing device for iron phosphate production, including: a plurality of water supply systems, a plurality of plate-frame filter presses, a water supply parallel pipe, a return water parallel pipe, a plurality of pressure transmitters, and a display;

[0009] Each water supply system is at least respectively connected to the pipelines of the plate-frame filter presses arranged in pairs;

[0010] The return water pipes of each water supply system are respectively connected in parallel with the return water parallel pipe;

[0011] The outlet pipes of each water supply system are respectively connected in parallel with the water supply parallel pipe;

[0012] Pressure transmitters are respectively arranged on the water supply parallel pipe and the return water parallel pipe and are electrically connected to the display respectively;

[0013] The water supply system includes: an extrusion water pump; the extrusion water pump is arranged on the water outlet pipe of the water supply system.

[0014] Preferably, the water supply system includes: a water tank, a plurality of pneumatic ball valves; the water inlet of the water tank is communicated with the extrusion water outlet pipeline of the plate and frame filter press, and the pneumatic ball valves are arranged on the pipeline connecting the water inlet of the water tank and the extrusion water outlet of the plate and frame filter press.

[0015] Preferably, the water supply system includes: a water tank, a plurality of pneumatic ball valves; the water outlet of the water tank is communicated with the extrusion water inlet pipeline of the plate and frame filter press, and the pneumatic ball valves are arranged on the pipeline connecting the water outlet of the water tank and the extrusion water inlet of the plate and frame filter press.

[0016] Preferably, the water supply system includes: an exhaust valve; the exhaust valve is arranged on the exhaust pipe of the water tank.

[0017] Preferably, the water supply system includes: a liquid outlet ball valve; the extrusion water pump and the liquid outlet ball valve are arranged at intervals on the liquid outlet pipe of the water tank.

[0018] Preferably, it includes: a plurality of manual ball valves; the manual ball valves are arranged at intervals on the return water parallel pipe.

[0019] Preferably, the manual ball valve is arranged on the pipeline connecting the return water parallel pipe and each water supply system.

[0020] Preferably, the manual ball valve is arranged on the pipeline connecting the water supply parallel pipe and each water supply system.

[0021] Preferably, the pressure transmitter is arranged on the water supply parallel pipe between the water supply systems adjacent to any two pipelines.

[0022] Preferably, the pressure transmitter is arranged on the return water parallel pipe between the water supply systems adjacent to any two pipelines.

[0023] The beneficial effects that this application can produce include:

[0024] 1) The first-stage plate and frame pressing device for iron phosphate production provided by this application, by connecting the plate and frame extruders sharing the same water supply system in parallel with the other water supply systems of the same level respectively, effectively improves the water pressure required by at least any one plate and frame extruder, increases the pressure required for extrusion, enables the plate and frame extruders in the same water supply system to perform extrusion simultaneously, and improves the processing efficiency. Description of the Drawings

[0025] Figure 1 It is a schematic diagram of the first-stage plate and frame pressing device for iron phosphate production in at least one embodiment provided by this application;

[0026] Figure 2 Schematic diagram of the first-stage plate-and-frame pressing device module for iron phosphate production provided by this application;

[0027] Legend:

[0028] Pneumatic ball valve 1, water tank 21, exhaust valve 211, extrusion water pump 22, liquid outlet ball valve 213, return water parallel pipe 3, pressure transmitter 31, water supply parallel pipe 4, manual ball valve 311, PLC module 41, display 42. Detailed implementation manners

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. The components of the embodiments of the present utility model usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the present utility model to be protected, but merely represents the selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0031] The controller used in this implementation scheme is of an existing structure, and the control circuit can be realized by simple programming by those skilled in the art, which belongs to the common knowledge in the art. Only its use is described without modification, so the control method and circuit connection will not be described in detail.

[0032] The technical means not detailed in this application and not used to solve the technical problems of this application are set according to the common knowledge in the art, and multiple common knowledge setting methods can be realized.

[0033] See Figures 1 - 2 , the first-stage plate-and-frame pressing device for iron phosphate production provided by this application includes: a plurality of pneumatic ball valves 1, a plurality of water tanks 21, a plurality of exhaust valves 211, a plurality of extrusion water pumps 22, a plurality of liquid outlet ball valves 213, a return water parallel pipe 3, a plurality of pressure transmitters 31, a water supply parallel pipe 4, a plurality of manual ball valves 311, a PLC module 41, and a display 42.

[0034] Six first-stage plate-and-frame filter presses are provided respectively, and each is numbered from A to F. Two adjacent plate-and-frame filter presses share a water supply system. Specifically, the first water supply system is respectively connected to the inlet and outlet pipelines of the circulating extrusion water of plate-and-frame filter press A and plate-and-frame filter press B. The second water supply system is respectively connected to the inlet and outlet pipelines of the circulating extrusion water of plate-and-frame filter press C and plate-and-frame filter press D. The third water supply system is respectively connected to the inlet and outlet pipelines of the circulating extrusion water of plate-and-frame filter press E and plate-and-frame filter press F. Each plate-and-frame filter press is used for the first-stage pressure filtration of the slurry.

[0035] The return water pipes of the first water supply system, the second water supply system, and the third water supply system are respectively connected to the return water parallel pipe 3; the outlet pipes of the first water supply system, the second water supply system, and the third water supply system are respectively connected to the water supply parallel pipe 4; pressure transmitters 31 are arranged at intervals on the return water parallel pipe 3; pressure transmitters 31 are arranged at intervals on the water supply parallel pipe 4.

[0036] Each pressure transmitter 31 is respectively electrically connected to the display 42. The operator adjusts the water supply pressure value of each water supply system according to the pressure values measured by the pressure transmitters 31 on the return water parallel pipe 3 and the water supply parallel pipe 4 to ensure the water supply to each plate-and-frame filter press sharing the same water supply system.

[0037] For example, when plate-and-frame filter press A and plate-and-frame filter press B sharing the first water supply system need to be used simultaneously or plate-and-frame filter press A is shut down for maintenance and it is necessary to ensure the normal use of plate-and-frame filter press B, the water in the water tank 21 of the second water supply system can be pressurized and transported into the first water supply system through the return water parallel pipe 3 and the water supply parallel pipe 4, and the valve is set to supply water only to plate-and-frame filter press B, so that there is no need to queue up and wait, and it is not necessary to wait for the maintenance of plate-and-frame filter press A to ensure the normal pressure filtration operation of plate-and-frame filter press B, improving production efficiency. The relationship between the specific pressure value and the parameter setting of the extrusion water pump 22 can be obtained by the operator through conventional tests in this field, so as to adjust the extrusion water pump 22 in any water supply system according to the data displayed on the display 42 to achieve the effect of normal water supply.

[0038] In a specific embodiment, the water supply system includes: a plurality of pneumatic ball valves 1, a water tank 21, an extrusion water pump 22, and a liquid outlet ball valve 213; the water inlet of the water tank 21 is connected to the outlet pipeline of the circulating extrusion water of each plate-and-frame filter press, and a pneumatic ball valve 1 is arranged on the connecting pipeline; the water outlet of the water tank 21 is connected to the inlet pipeline of the circulating extrusion water of each plate-and-frame filter press, and the extrusion water pump 22 and the liquid outlet ball valve 213 are arranged at intervals on the connecting pipeline.

[0039] In a specific embodiment, the pneumatic ball valves 1 are respectively arranged on the pipelines connecting any one of the plate-and-frame filter presses from A to F to the water tank 21 of the corresponding water supply system to cut off and supply water to any one of the plate-and-frame filter presses.

[0040] In a specific embodiment, it includes: a plurality of manual ball valves 311; the manual ball valves 311 are respectively arranged on the pipelines where the return water parallel pipe 3 is connected to the return water pipes of each water supply system. To achieve separate control of the water supply to each water supply system, and then cooperate with the pneumatic ball valves 1 that separately control the water inlet and outlet of each plate and frame filter press, to achieve the on-off control of the separate water supply to each plate and frame filter press. For example, the manual ball valves 311 are respectively arranged on the pipelines where the return water parallel pipe 3 and the water supply parallel pipe 4 are connected to the first water supply system, and so on, the manual ball valves 311 are respectively arranged on the pipelines where the return water parallel pipe 3 and the water supply parallel pipe 4 are connected to each water supply system.

[0041] In a specific embodiment, it includes: a plurality of manual ball valves 311; the manual ball valves 311 are respectively arranged on the pipelines where the water supply parallel pipe 4 is connected to the outlet water pipes of each water supply system. To achieve separate control of the water supply to each water supply system, and then cooperate with the pneumatic ball valves 1 that separately control the water inlet and outlet of each plate and frame filter press, to achieve the on-off control of the separate water supply to each plate and frame filter press.

[0042] In a specific embodiment, the pressure transmitter 31 is arranged on the return water parallel pipe 3 between the adjacent water supply systems arranged on any two pipelines. To achieve accurate detection of the pressure change.

[0043] In a specific embodiment, the pressure transmitter 31 is arranged on the water supply parallel pipe 4 between the adjacent water supply systems arranged on any two pipelines. To achieve accurate detection of the pressure change.

[0044] In a specific embodiment, the water supply system includes: an exhaust valve 211; the exhaust valve 211 is arranged on the exhaust pipe at the top of the water tank 21 to relieve the pressure of the water tank 21 according to the pressure change situation.

[0045] In a specific embodiment, the extrusion water pump 22 is arranged close to the water tank 21 to facilitate improving the reliability of the pressure control and adjustment.

[0046] In a specific embodiment, the water supply system includes: a liquid outlet ball valve 213; the liquid outlet ball valve 213 is arranged close to the extrusion water pump 22 on the outlet water pipeline of the water tank 21. To achieve effective control of the outlet water pipeline.

[0047] In a specific embodiment, it includes: a PLC module 41; the PLC module 41 is respectively electrically connected to each pressure transmitter 31 to obtain the pressure value; the PLC module 41 is electrically connected to the display 42.

[0048] In a specific embodiment, the PLC module 41 can also be electrically connected to the extrusion water pump 22. To achieve controlling the pressure value of the water output by each extrusion water pump 22 according to whether the pressure value changes of the return water parallel pipe 3 and the water supply parallel pipe 4 exceed the threshold. The specific control method is carried out according to the commonly used water pressure control method in the field and will not be elaborated here.

[0049] The specific control process is as follows:

[0050] When the outlet pressure of the extrusion water station is lower than 0.63 MPa, increase the frequency of the extrusion water pump 22 in the first water supply system. When the pressure continues to drop below 0.6 MPa, increase the frequency of the extrusion water pump 22 in the second water supply system. When the pressure continues to drop and is lower than 0.57 MPa, increase the frequency of the extrusion water pump 22 in the third water supply system. On the contrary, when the outlet pressure of the extrusion water station is higher than 0.57 MPa, reduce the frequency of the extrusion water pump 22 in the third water supply system. When the pressure is still higher than 0.6 MPa, start to reduce the frequency of the extrusion water pump 22 in the second water supply system. When the pressure is higher than 0.63 MPa, start to reduce the frequency of the extrusion water pump 22 in the third water supply system. Adjust the setting pressure of the safety valve at the outlet of the extrusion water pump to 0.7 MPa.

[0051] Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features thereof. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A primary plate and frame pressing device for the production of iron phosphate, characterized in that, Including: Multiple water supply systems, multiple plate and frame filter presses, a water supply parallel pipe (4), a return water parallel pipe (3), multiple pressure transmitters (31), and a display (42); Each water supply system is at least respectively connected to the pipelines of the paired plate and frame filter presses; The return water pipes of each water supply system are respectively connected in parallel with the return water parallel pipe (3); The outlet pipes of each water supply system are respectively connected in parallel with the water supply parallel pipe (4); The pressure transmitters (31) are respectively arranged on the water supply parallel pipe (4) and the return water parallel pipe (3) and are respectively electrically connected to the display (42); The water supply system includes: an extrusion water pump (22); the extrusion water pump (22) is arranged on the outlet pipe of the water supply system.

2. The first-stage plate-and-frame pressing device for producing iron phosphate according to claim 1, wherein The water supply system includes: a water tank (21), multiple pneumatic ball valves (1); the water inlet of the water tank (21) is connected to the pipeline of the extrusion water outlet of the plate and frame filter press, and the pneumatic ball valve (1) is arranged on the pipeline connecting the water inlet of the water tank (21) and the extrusion water outlet of the plate and frame filter press.

3. The first-stage plate-and-frame pressing device for iron phosphate production according to claim 1, characterized in that, The water supply system includes: a water tank (21), multiple pneumatic ball valves (1); the water outlet of the water tank (21) is connected to the pipeline of the extrusion water inlet of the plate and frame filter press, and the pneumatic ball valve (1) is arranged on the pipeline connecting the water outlet of the water tank (21) and the extrusion water inlet of the plate and frame filter press.

4. The first-stage plate and frame pressing device for iron phosphate production according to claim 2 or 3, characterized in that, The water supply system includes: an exhaust valve (211); the exhaust valve (211) is arranged on the exhaust pipe of the water tank (2).

5. The first-stage plate and frame pressing device for producing iron phosphate according to claim 2 or 3, characterized in that, The water supply system includes: a liquid outlet ball valve (213); the extrusion water pump (22) and the liquid outlet ball valve (213) are arranged at intervals on the liquid outlet pipe of the water tank (2).

6. The first-stage plate-and-frame pressing device for iron phosphate production according to claim 1, wherein Including: Multiple manual ball valves (311); the manual ball valves (311) are arranged at intervals on the return water parallel pipe (3).

7. The first-stage plate and frame pressing device for the production of iron phosphate according to claim 6, characterized in that, The manual ball valve (311) is arranged on the pipeline connecting the return water parallel pipe (3) and each water supply system.

8. The first-stage plate and frame pressing device for the production of iron phosphate according to claim 6, characterized in that, The manual ball valve (311) is arranged on the pipeline connecting the water supply parallel pipe (4) and each water supply system.

9. The first-stage plate-and-frame pressing device for producing iron phosphate according to claim 1, wherein, The pressure transmitter (31) is arranged on the water supply parallel pipe (4) between any two adjacent water supply systems of the pipelines.

10. The first-stage plate-and-frame pressing device for producing iron phosphate according to claim 1, characterized in that, The pressure transmitter (31) is arranged on the return water parallel pipe (3) between any two adjacent water supply systems of the pipelines.

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