Intermediate acid ceramic membrane filtering and cleaning system

Abstract

The utility model relates to an intermediate acid ceramic membrane filtering and cleaning system which comprises an intermediate acid storage tank, a ceramic membrane filter, a finished product intermediate acid storage tank and a primary cleaning device arranged in the ceramic membrane filter. By arranging the ceramic membrane filter between the intermediate acid storage tank and the finished product intermediate acid storage tank, particles and impurities in the intermediate acid can be effectively reduced, the quality of the finished product intermediate acid is improved, the sales volume of the finished product intermediate acid is greatly increased, and meanwhile, as a downstream production raw material, the blocking and cleaning frequency of subsequent procedures is obviously reduced; the parking frequency, cleaning cost and environmental protection risk are reduced, and the economic benefits of enterprises are improved; the primary cleaning device is arranged in the ceramic membrane filter to continuously clean the filter element and reduce the blockage risk of the filter element in the intermediate acid filtering process, so that the filter can keep normal flux for a long time, the filtering use time of the filter is effectively prolonged, the cleaning frequency is reduced, the filtering efficiency is effectively improved, and the service life of the filter is prolonged. The economic benefits of enterprises are further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical process, in particular to an intermediate acid ceramic membrane filtering and cleaning system. Background Art

[0002] At present, in the phosphoric acid production system of chemical enterprises, the intermediate acid of the semi-hydrated dihydrate product is not filtered in the original process design, but is directly sent to the finished intermediate acid storage tank, and then sold or used as production raw materials for downstream. In this way, due to the high particles and impurities in the intermediate acid, the sales appearance is not good, the sales volume is small and the price is low, and the profit is small; the unfiltered intermediate acid is supplied to downstream production, which is easy to cause system blockage, high cleaning frequency, low device start-up rate, resulting in high cleaning and cleaning costs, high environmental risks and other problems, which have an adverse impact on the economic benefits of the enterprise. Utility Model Content

[0003] In view of the shortcomings of the prior art mentioned above, the purpose of the utility model is to provide an intermediate acid ceramic membrane filtration and cleaning system to solve the problems in the existing phosphoric acid production system, in which the unfiltered intermediate acid is supplied to downstream production, which easily causes system blockage, high cleaning frequency, low device start-up rate, high cleaning and cleaning costs, and great environmental risks.

[0004] In order to achieve the above-mentioned purpose and other related purposes, the utility model provides an intermediate acid ceramic membrane filtration and cleaning system, comprising:

[0005] Intermediate acid storage tank, used to store unfiltered intermediate acid;

[0006] a ceramic membrane filter, connected to the intermediate acid storage tank, and used for filtering unfiltered intermediate acid in the intermediate acid storage tank;

[0007] A finished intermediate acid storage tank is connected to the ceramic membrane filter, and the finished intermediate acid storage tank is used to store the intermediate acid filtered by the ceramic membrane filter;

[0008] A primary cleaning device is arranged in the ceramic membrane filter, and the ceramic membrane filter includes a plurality of filter elements. The primary cleaning device includes a driving component, a transmission assembly and a mounting structure. The mounting structure is provided with a plurality of brushes, and the brushes are sleeved on the filter element. The transmission assembly is connected to the mounting structure, and the driving component is used to drive the transmission assembly to drive the mounting structure to move axially along the filter element.

[0009] Optionally, the intermediate acid storage tank is connected to an intermediate acid inlet pipe and an intermediate acid outlet pipe, the intermediate acid outlet pipe is used to connect the intermediate acid storage tank with the ceramic membrane filter, the intermediate acid outlet pipe is provided with an intermediate acid outlet pump, the intermediate acid outlet pump is used to pump out the unfiltered intermediate acid in the intermediate acid storage tank, and the intermediate acid outlet pipe is also provided with an intermediate acid outlet valve.

[0010] Optionally, the ceramic membrane filter is connected to the finished intermediate acid storage tank through a finished intermediate acid outlet pipe, and the ceramic membrane filter is provided with a liquid inlet and a liquid outlet, the liquid inlet is connected to the intermediate acid outlet pipe, and the liquid outlet is connected to the finished intermediate acid outlet pipe, and the finished intermediate acid outlet pipe is provided with a finished intermediate acid outlet pump and a finished intermediate acid outlet valve, and the finished intermediate acid outlet pump is used to pump out the intermediate acid filtered in the ceramic membrane filter.

[0011] Optionally, the ceramic membrane filter is further provided with an acid slag discharge outlet, the acid slag discharge outlet is connected to an acid slag discharge pipe, and the acid slag discharge pipe is provided with an acid slag discharge valve.

[0012] Optionally, the finished intermediate acid liquid outlet pipe is further provided with an exhaust pipe, the exhaust pipe is provided with an exhaust valve, and the exhaust pipe is used to discharge the regeneration gas in the ceramic membrane filter.

[0013] Optionally, the finished intermediate acid storage tank is provided with a finished intermediate acid discharge pipe, and the finished intermediate acid discharge pipe is provided with a finished intermediate acid discharge valve and a finished intermediate acid discharge pump, and the finished intermediate acid discharge pump is used to pump out the intermediate acid after filtering in the finished intermediate acid storage tank.

[0014] Optionally, a secondary cleaning device is also included, which includes an air intake pump, an air intake pipe and an air intake valve. One end of the air intake pipe is connected to the air intake pump, and the other end is connected to the intermediate acid outlet pipe and is located between the liquid inlet and the intermediate acid outlet valve.

[0015] Optionally, a three-stage cleaning device is also included, which includes a liquid alkali storage tank, a liquid alkali outlet pipe and a liquid alkali recovery pipe are connected to the liquid alkali storage tank, the liquid alkali outlet pipe is communicated with the liquid inlet, a liquid alkali outlet pump and a liquid alkali outlet valve are provided on the liquid alkali outlet pipe, the liquid alkali outlet pump is used to pump the liquid alkali in the liquid alkali storage tank into the ceramic membrane filter, the liquid alkali recovery pipe is connected to the acid slag discharge pipe and is located between the acid slag discharge port and the acid slag discharge valve, the liquid alkali recovery pipe is provided with a liquid alkali recovery pump and a liquid alkali recovery valve, and the liquid alkali recovery pump is used to recover the liquid alkali in the ceramic membrane filter to the liquid alkali storage tank.

[0016] Optionally, the driving component is a motor, the transmission assembly includes a screw and a slider, the slider is threadedly connected to the screw, the screw is rotationally connected to the ceramic membrane filter, and the driving component is connected to the screw.

[0017] Optionally, the primary cleaning device further comprises a protective cover, and the protective cover is arranged around the driving component in the ceramic membrane filter.

[0018] As described above, the utility model has the following beneficial effects: by arranging a ceramic membrane filter between the intermediate acid storage tank and the finished intermediate acid storage tank, the present application can effectively reduce the particles and impurities in the intermediate acid, thereby effectively improving the quality of the finished intermediate acid, and greatly increasing the sales volume of the finished intermediate acid. At the same time, as a downstream production raw material, the blockage and cleaning frequency of the subsequent process are significantly reduced, reducing the parking frequency, cleaning costs and environmental risks, thereby effectively improving the economic benefits of the enterprise; by arranging a primary cleaning device inside the ceramic membrane filter during the intermediate acid filtration process, the filter element is continuously cleaned to reduce the risk of blockage of the filter element, so that the filter can maintain normal flux for a long time, effectively improving the filtering use time of the filter, reducing the cleaning frequency, thereby effectively improving the filtration efficiency, and further improving the economic benefits of the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The intermediate acid ceramic membrane filtration and cleaning system shown in the embodiment of the present application is shown;

[0020] Figure 2 Display as Figure 1 Schematic diagram of the structure of the ceramic membrane filter;

[0021] Figure 3 Display as Figure 2 Enlarged schematic diagram of the structure of section A in the middle.

[0022] Description of Reference Numerals

[0023] Intermediate acid storage tank 1, intermediate acid liquid inlet pipe 101, intermediate acid liquid outlet pipe 102, intermediate acid liquid outlet pump 103, intermediate acid liquid outlet valve 104, ceramic membrane filter 2, filter element 201, liquid inlet 202, liquid outlet 203, acid slag outlet 204, acid slag outlet pipe 205, acid slag outlet valve 206, finished product intermediate acid storage tank 3, finished product intermediate acid liquid outlet pipe 301, finished product intermediate acid liquid outlet pump 302, finished product intermediate acid liquid outlet valve 303, exhaust pipe 304, exhaust valve 305, finished product intermediate acid outlet pipe 306, finished product intermediate acid outlet Valve 307, finished product intermediate acid discharge pump 308, primary cleaning device 4, drive component 401, transmission assembly 402, screw rod 402a, slider 402b, mounting structure 403, brush 403a, protective cover 404, secondary cleaning device 5, air intake pump 501, air intake pipe 502, air intake valve 503, tertiary cleaning device 6, liquid alkali storage tank 601, liquid alkali outlet pipe 602, liquid alkali outlet pump 602a, liquid alkali outlet valve 602b, liquid alkali recovery pipe 603, liquid alkali recovery pump 603a, liquid alkali recovery valve 603b. DETAILED DESCRIPTION

[0024] The following is an explanation of the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0025] See also Figures 1 to 3 . It should be noted that the illustrations provided in this embodiment only illustrate the basic concept of the utility model in a schematic manner, so the diagram only shows the components related to the utility model rather than being drawn according to the number, shape and size of the components during actual implementation. During actual implementation, the type, quantity and proportion of each component can be changed at will, and the component layout type may also be more complicated. The structure, proportion, size, etc. illustrated in the drawings attached to this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the restrictive conditions for the implementation of the utility model, so they have no technical substantive significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in the utility model without affecting the effect and purpose that can be achieved by the utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" cited in this specification are only for the convenience of description and are not used to limit the scope of the implementation of the present utility model. Changes or adjustments to their relative relationships should be regarded as the scope of the implementation of the present utility model without substantially changing the technical content.

[0026] Before describing the embodiments of the utility model in detail, the application environment of the utility model is described first. The technology of the utility model is mainly applied to the field of chemical process technology. The utility model is used to solve the problems of the existing phosphoric acid production system, in which the unfiltered intermediate acid is supplied to the downstream production, which easily causes the system to be blocked, the cleaning frequency is high, the device start-up rate is low, resulting in high cleaning and cleaning costs, and high environmental risks.

[0027] Please combine Figures 1 to 3 As shown, the utility model provides an intermediate acid ceramic membrane filtration and cleaning system, comprising:

[0028] In an exemplary embodiment of the present application, an intermediate acid storage tank 1 is used to store unfiltered intermediate acid; a ceramic membrane filter 2 is connected to the intermediate acid storage tank 1, and the ceramic membrane filter 2 is used to filter the unfiltered intermediate acid in the intermediate acid storage tank 1; a finished intermediate acid storage tank 3 is connected to the ceramic membrane filter 2, and the finished intermediate acid storage tank 3 is used to store the intermediate acid filtered by the ceramic membrane filter 2; a primary cleaning device 4 is arranged in the ceramic membrane filter 2, and the ceramic membrane filter 2 includes a plurality of filter elements 201, and the primary cleaning device 4 includes a driving component 401, a transmission assembly 402 and a mounting structure 403, and a plurality of brushes 403a are provided on the mounting structure 403, and the brushes 403a are sleeved on the filter element 201, and the transmission assembly 402 is connected to the mounting structure 403, and the driving component 401 is used to drive the transmission assembly 402 to drive the mounting structure 403 to move along the axial direction of the filter element 201.

[0029] In this embodiment, the present application can effectively reduce the particles and impurities in the intermediate acid by setting a ceramic membrane filter 2 between the intermediate acid storage tank 1 and the finished intermediate acid storage tank 3, thereby effectively improving the quality of the finished intermediate acid, greatly increasing the sales volume of the finished intermediate acid, and at the same time, as a downstream production raw material, the blockage and cleaning frequency of the subsequent process are significantly reduced, reducing the parking frequency, cleaning costs and environmental risks, thereby effectively improving the economic benefits of the enterprise; the present application continuously cleans the filter element 201 during the intermediate acid filtration process by setting a primary cleaning device 4 inside the ceramic membrane filter 2, reducing the risk of blockage of the filter element 201, allowing the filter to maintain normal flux for a long time, effectively improving the filtering use time of the filter, reducing the cleaning frequency, thereby effectively improving the filtration efficiency, and further improving the economic benefits of the enterprise.

[0030] In an exemplary embodiment of the present application, an intermediate acid inlet pipe 101 and an intermediate acid outlet pipe 102 are connected to the intermediate acid storage tank 1. The intermediate acid outlet pipe 102 is used to connect the intermediate acid storage tank 1 with the ceramic membrane filter 2. An intermediate acid outlet pump 103 is provided on the intermediate acid outlet pipe 102. The intermediate acid outlet pump 103 is used to pump out the unfiltered intermediate acid in the intermediate acid storage tank 1. An intermediate acid outlet valve 104 is also provided on the intermediate acid outlet pipe 102.

[0031] In this embodiment, the intermediate acid inlet pipe 101 is used to connect the phosphoric acid production device with the intermediate acid storage tank 1, so that the intermediate acid in the phosphoric acid production device is stored in the intermediate acid storage tank 1, and by opening the intermediate acid outlet valve 104, the intermediate acid storage tank 1 is connected with the ceramic membrane filter 2, and by opening the intermediate acid outlet pump 103, the unfiltered intermediate acid in the intermediate acid storage tank 1 is pumped into the ceramic membrane filter 2 for filtration.

[0032] In an exemplary embodiment of the present application, the ceramic membrane filter 2 is connected to the finished intermediate acid storage tank 3 through the finished intermediate acid outlet pipe 301. The ceramic membrane filter 2 is provided with a liquid inlet 202 and a liquid outlet 203. The liquid inlet 202 is connected to the intermediate acid outlet pipe 102, and the liquid outlet 203 is connected to the finished intermediate acid outlet pipe 301. The finished intermediate acid outlet pipe 301 is provided with a finished intermediate acid outlet pump 302 and a finished intermediate acid outlet valve 303. The finished intermediate acid outlet pump 302 is used to pump out the intermediate acid filtered in the ceramic membrane filter 2.

[0033] In this embodiment, the intermediate acid that has been filtered in the ceramic membrane filter 2 is pumped into the finished intermediate acid storage tank 3 by opening the finished intermediate acid outlet valve 303 and the finished intermediate acid outlet pump 302 .

[0034] In an exemplary embodiment of the present application, the ceramic membrane filter 2 is further provided with an acid slag discharge port 204 , the acid slag discharge port 204 is connected with an acid slag discharge pipe 205 , and the acid slag discharge pipe 205 is provided with an acid slag discharge valve 206 .

[0035] In this embodiment, the intermediate acid outlet valve 104 and the finished intermediate acid outlet valve 303 are closed, the acid slag discharge valve 206 is opened, and the acid slag precipitate formed by the particles and impurities scraped off the filter element 201 by the first-level cleaning device 4 is discharged through the acid slag discharge pipe 205.

[0036] In an exemplary embodiment of the present application, an exhaust pipe 304 is further provided on the finished intermediate acid liquid outlet pipe 301 , and an exhaust valve 305 is provided on the exhaust pipe 304 . The exhaust pipe 304 is used to discharge the regeneration gas in the ceramic membrane filter 2 .

[0037] In this embodiment, the exhaust pipe 304 is connected to the finished intermediate acid liquid outlet pipe 301, and the connection point is located on the finished intermediate acid liquid outlet pipe 301 between the liquid outlet 203 and the finished intermediate acid liquid outlet valve 303. By closing the finished intermediate acid liquid outlet valve 303 and opening the exhaust valve 305, the regenerated gas in the ceramic membrane filter 2 is discharged through the exhaust pipe 304.

[0038] In an exemplary embodiment of the present application, a finished intermediate acid discharge pipe 306 is provided on the finished intermediate acid storage tank 3, and a finished intermediate acid discharge valve 307 and a finished intermediate acid discharge pump 308 are provided on the finished intermediate acid discharge pipe 306. The finished intermediate acid discharge pump 308 is used to pump out the intermediate acid after filtering in the finished intermediate acid storage tank 3.

[0039] In this embodiment, the finished intermediate acid liquid outlet valve 303 is closed, the finished intermediate acid discharge valve 307 is opened, and the finished intermediate acid discharge pump 308 is turned on, and the finished intermediate acid is sent to downstream production or take-out through the finished intermediate acid discharge pipe 306 connected to the finished intermediate acid storage tank 3.

[0040] In an exemplary embodiment of the present application, a secondary cleaning device 5 is also included, which includes an air intake pump 501, an air intake pipe 502 and an air intake valve 503. One end of the air intake pipe 502 is connected to the air intake pump 501, and the other end is connected to the intermediate acid outlet pipe 102, and is located between the liquid inlet 202 and the intermediate acid outlet valve 104.

[0041] In this embodiment, after the ceramic membrane filter 2 has been running for a period of time, the pressure difference between the liquid inlet 202 and the liquid outlet 203 of the ceramic membrane filter 2 increases, and blockage occurs. The cleaning effect of the first-level cleaning device 4 is low. At this time, the second-level cleaning device 5 is turned on, the intermediate acid liquid outlet valve 104 and the finished intermediate acid liquid outlet valve 303 are closed, the acid slag discharge valve 206 and the air intake valve 503 are opened, the air intake pump 501 is turned on, and compressed gas is blown into the ceramic membrane filter 2 through the air intake pipe 502 to blow up and clean the filter element 201 until the filter element 201 recovers its flux and then it can continue to be put into operation.

[0042] In an exemplary embodiment of the present application, a three-stage cleaning device 6 is also included, and the three-stage cleaning device 6 includes a liquid alkali storage tank 601, and a liquid alkali outlet pipe 602 and a liquid alkali recovery pipe 603 are connected to the liquid alkali storage tank 601, the liquid alkali outlet pipe 602 is connected to the liquid inlet 202, and a liquid alkali outlet pump 602a and a liquid alkali outlet valve 602b are provided on the liquid alkali outlet pipe 602. The liquid alkali outlet pump 602a is used to pump the liquid alkali in the liquid alkali storage tank 601 into the ceramic membrane filter 2. The liquid alkali recovery pipe 603 is connected to the acid slag discharge pipe 205 and is located between the acid slag discharge port 204 and the acid slag discharge valve 206. The liquid alkali recovery pipe 603 is provided with a liquid alkali recovery pump 603a and a liquid alkali recovery valve 603b. The liquid alkali recovery pump 603a is used to recover the liquid alkali in the ceramic membrane filter 2 to the liquid alkali storage tank 601.

[0043] In this embodiment, after multiple operations, if the secondary cleaning device 5 cannot completely restore the flux of the filter element 201, the tertiary cleaning device 6 is opened, the intermediate acid outlet valve 104, the air inlet valve 503, the finished intermediate acid outlet valve 303 and the acid residue discharge valve 206 are closed, the liquid alkali outlet valve 602b and the liquid alkali recovery valve 603b are opened, and the liquid alkali in the liquid alkali storage tank 601 is pumped into the ceramic membrane filter 2 by the liquid alkali outlet pump 602a, and the liquid alkali in the ceramic membrane filter 2 is recovered to the liquid alkali storage tank 601 by the liquid alkali recovery pump 603a, and the liquid alkali circulation regeneration is opened, so that the flux of the ceramic membrane filter 2 is completely restored, thereby ensuring the normal and orderly operation of the system. Through the primary cleaning device 4, the secondary cleaning device 5 and the tertiary cleaning device 6, the filter element 201 is cleaned under different conditions, thereby ensuring the stable filtering operation of the system, effectively improving the service life of the filtration system, reducing the cleaning difficulty and cleaning cost, and thus improving the economic benefits of the enterprise.

[0044] In an exemplary embodiment of the present application, the driving component 401 is a motor, the transmission assembly 402 includes a screw rod 402a and a slider 402b, the slider 402b is threadedly connected to the screw rod 402a, the screw rod 402a is rotationally connected to the ceramic membrane filter 2, and the driving component 401 is connected to the screw rod 402a.

[0045] In this embodiment, a screw rod 402a transmission device is provided to drive the mounting structure 403 to move axially along the filter element 201, so that the first-stage cleaning device 4 can clean different axial height positions of the filter element 201, and the brush 403a is arranged in the circumferential direction of the filter element 201. Combined with the screw rod 402a transmission device, the brush 403a can clean the filter element 201 without dead angles, effectively reducing the risk of clogging of the filter element 201 and increasing the filtering time of the ceramic membrane filter 2.

[0046] In an exemplary embodiment of the present application, the primary cleaning device 4 further includes a protective cover 404 , which is disposed around the driving component 401 in the ceramic membrane filter 2 .

[0047] In this embodiment, the protective cover 404 prevents the acid residue from contacting the driving component 401 , thereby preventing the driving component 401 from being corroded and damaged by the acid residue.

[0048] Working principle: when the system is filtering, the phosphoric acid production device transports the intermediate acid to the intermediate acid storage tank 1 through the intermediate acid inlet pipe 101, opens the intermediate acid outlet valve 104, pumps the unfiltered intermediate acid in the intermediate acid storage tank 1 into the ceramic membrane filter 2 through the intermediate acid outlet pump 103, filters particles and impurities through the filter element 201, opens the finished intermediate acid outlet valve 303, and pumps the filtered intermediate acid in the ceramic membrane filter 2 to the finished intermediate acid storage tank 3 through the finished intermediate acid outlet pump 302, and opens the finished intermediate acid outlet valve 303. The valve 307 is used, and the finished intermediate acid in the finished intermediate acid storage tank 3 is sent to the downstream production or sale through the finished intermediate acid discharge pump 308. During the working process, the primary cleaning device 4 continuously cleans the filter element 201, and the driving component 401 drives the transmission component 402 to drive the mounting structure 403 to reciprocate along the axial direction of the filter element 201, and the brush 403a provided on the mounting structure 403, and the brush 403a is sleeved on the filter element 201, so as to clean the filter element 201 in the axial direction and the circumferential direction, so as to extend the cleaning process. The clogging cycle of the long ceramic membrane filter 2 is extended. If the primary cleaning device 4 fails, close the intermediate acid outlet valve 104 and the finished intermediate acid outlet valve 303, open the air inlet pipe 502 and the acid residue discharge pipe 205, start the air inlet pump 501, and blow compressed gas into the ceramic membrane filter 2 through the air inlet pipe 502 to blow and clean the filter element 201 until the filter element 201 recovers its flux, and then continue to put it into operation; after multiple operations, if the secondary cleaning device 5 cannot completely restore the flux of the filter element 201, open the tertiary cleaning device 6. Close the intermediate acid outlet valve 104, the air inlet valve 503, the finished intermediate acid outlet valve 303 and the acid residue discharge valve 206, open the liquid alkali outlet valve 602b and the liquid alkali recovery valve 603b, pump the liquid alkali in the liquid alkali storage tank 601 into the ceramic membrane filter 2 through the liquid alkali outlet pump 602a, and recover the liquid alkali in the ceramic membrane filter 2 to the liquid alkali storage tank 601 through the liquid alkali recovery pump 603a, and start the liquid alkali circulation regeneration, so that the flux of the ceramic membrane filter 2 is completely restored, thereby ensuring the normal and orderly operation of the system. Through the first-level cleaning device 4, the second-level cleaning device 5 and the third-level cleaning device 6, the filter element 201 is cleaned under different conditions, thereby ensuring the stable filtering operation of the system, effectively improving the service life of the filtration system, reducing the cleaning difficulty and cleaning cost, and thus improving the economic efficiency of the enterprise.The present application sets a ceramic membrane filter 2 between the intermediate acid storage tank 1 and the finished intermediate acid storage tank 3, which can effectively reduce the particles and impurities in the intermediate acid, thereby effectively improving the quality of the finished intermediate acid, greatly increasing the sales volume of the finished intermediate acid, and at the same time, as a downstream production raw material, the blockage and cleaning frequency of the subsequent process are significantly reduced, reducing the parking frequency, cleaning costs and environmental risks, thereby effectively improving the economic benefits of the enterprise; the present application sets a primary cleaning device 4 inside the ceramic membrane filter 2 to continuously clean the filter element 201 during the intermediate acid filtration process, reduce the risk of blockage of the filter element 201, and enable the filter to maintain normal flux for a long time, effectively increase the filtering use time of the filter, reduce the cleaning frequency, thereby effectively improving the filtration efficiency, and further improving the economic benefits of the enterprise.

[0049] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. An intermediate acid ceramic membrane filtration and cleaning system, characterized in that: include: Intermediate acid storage tank, used to store unfiltered intermediate acid; a ceramic membrane filter, connected to the intermediate acid storage tank, and used for filtering unfiltered intermediate acid in the intermediate acid storage tank; A finished intermediate acid storage tank is connected to the ceramic membrane filter, and the finished intermediate acid storage tank is used to store the intermediate acid filtered by the ceramic membrane filter; A primary cleaning device is arranged in the ceramic membrane filter, and the ceramic membrane filter includes a plurality of filter elements. The primary cleaning device includes a driving component, a transmission assembly and a mounting structure. The mounting structure is provided with a plurality of brushes, and the brushes are sleeved on the filter element. The transmission assembly is connected to the mounting structure, and the driving component is used to drive the transmission assembly to drive the mounting structure to move axially along the filter element.

2. The intermediate acid ceramic membrane filtration and cleaning system according to claim 1, characterized in that: The intermediate acid storage tank is connected with an intermediate acid inlet pipe and an intermediate acid outlet pipe, the intermediate acid outlet pipe is used to connect the intermediate acid storage tank with the ceramic membrane filter, the intermediate acid outlet pipe is provided with an intermediate acid outlet pump, the intermediate acid outlet pump is used to pump out the unfiltered intermediate acid in the intermediate acid storage tank, and the intermediate acid outlet pipe is also provided with an intermediate acid outlet valve.

3. The intermediate acid ceramic membrane filtration and cleaning system according to claim 2, characterized in that: The ceramic membrane filter is connected to the finished intermediate acid storage tank through a finished intermediate acid outlet pipe. The ceramic membrane filter is provided with a liquid inlet and a liquid outlet. The liquid inlet is connected to the intermediate acid outlet pipe, and the liquid outlet is connected to the finished intermediate acid outlet pipe. The finished intermediate acid outlet pipe is provided with a finished intermediate acid outlet pump and a finished intermediate acid outlet valve. The finished intermediate acid outlet pump is used to pump out the intermediate acid filtered in the ceramic membrane filter.

4. The intermediate acid ceramic membrane filtration and cleaning system according to claim 3 is characterized in that: The ceramic membrane filter is also provided with an acid slag discharge outlet, the acid slag discharge outlet is connected with an acid slag discharge pipe, and the acid slag discharge pipe is provided with an acid slag discharge valve.

5. The intermediate acid ceramic membrane filtration and cleaning system according to claim 3, characterized in that: The finished product intermediate acid liquid outlet pipe is also provided with an exhaust pipe, the exhaust pipe is provided with an exhaust valve, and the exhaust pipe is used to discharge the regeneration gas in the ceramic membrane filter.

6. The intermediate acid ceramic membrane filtration and cleaning system according to claim 5, characterized in that: The finished intermediate acid storage tank is provided with a finished intermediate acid discharge pipe, and the finished intermediate acid discharge pipe is provided with a finished intermediate acid discharge valve and a finished intermediate acid discharge pump, and the finished intermediate acid discharge pump is used to pump out the intermediate acid after filtering in the finished intermediate acid storage tank.

7. The intermediate acid ceramic membrane filtration and cleaning system according to claim 4, characterized in that: It also includes a secondary cleaning device, which includes an air intake pump, an air intake pipe and an air intake valve. One end of the air intake pipe is connected to the air intake pump, and the other end is connected to the intermediate acid outlet pipe and is located between the liquid inlet and the intermediate acid outlet valve.

8. The intermediate acid ceramic membrane filtration and cleaning system according to claim 7, characterized in that: It also includes a three-stage cleaning device, which includes a liquid alkali storage tank, a liquid alkali outlet pipe and a liquid alkali recovery pipe are connected to the liquid alkali storage tank, the liquid alkali outlet pipe is communicated with the liquid inlet, a liquid alkali outlet pump and a liquid alkali outlet valve are provided on the liquid alkali outlet pipe, the liquid alkali outlet pump is used to pump the liquid alkali in the liquid alkali storage tank into the ceramic membrane filter, the liquid alkali recovery pipe is connected to the acid slag discharge pipe and is located between the acid slag discharge port and the acid slag discharge valve, the liquid alkali recovery pipe is provided with a liquid alkali recovery pump and a liquid alkali recovery valve, the liquid alkali recovery pump is used to recover the liquid alkali in the ceramic membrane filter to the liquid alkali storage tank.

9. The intermediate acid ceramic membrane filtration and cleaning system according to claim 1, characterized in that: The driving component is a motor, the transmission assembly includes a screw rod and a slider, the slider is threadedly connected to the screw rod, the screw rod is rotationally connected to the ceramic membrane filter, and the driving component is connected to the screw rod.

10. The intermediate acid ceramic membrane filtration and cleaning system according to claim 9, characterized in that: The primary cleaning device also includes a protective cover, which is arranged around the driving component in the ceramic membrane filter.

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