Filter and filtering system

Abstract

The utility model belongs to the technical field of high-performance fiber manufacturing, and particularly relates to a filter and a filtering system. The multiple filter elements arranged in parallel are arranged in the filter, the multiple filter elements are correspondingly provided with the multiple spraying heads, the spraying heads can spray a cleaning agent to the filter elements, the filter elements can be cleaned, dismounting and cleaning of the filter are avoided, and then the filtering effect of the filter is ensured; the filtering system comprises a slurry storage tank, a cleaning agent storage tank, a delivery pump, a residual liquid storage tank, a filtrate storage tank and the filter, and the slurry storage tank, the delivery pump and the filter can form filtering circulation, so that the slurry is completely filtered, and the quality of subsequent products is ensured; the cleaning agent storage tank, the conveying pump and the filter can form cleaning circulation, the filter can be cleaned when needed, the cleaning effect can be ensured, and the cleaning efficiency can also be ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of high-performance fiber manufacturing, in particular to a filter and a filtering system. Background Art

[0002] The full name of meta-aramid is "poly(m-phenylene isophthalamide)," commonly known as "aramid 1313". It has excellent properties such as flame retardancy, high temperature resistance, electrical insulation, high strength, high modulus, and chemical corrosion resistance. Its products are widely used in safety protection, environmental protection, rail transportation, electrical insulation, aerospace and other fields. It is prepared by low-temperature solution polymerization of meta-phenylenediamine and isophthaloyl chloride and one-step spinning. The existing technology basically adopts four steps of polymerization, neutralization, dimerization, and two neutralization to prepare the polymer slurry for spinning. A large amount of hydrogen chloride will be produced during the polymerization reaction, so liquid ammonia is required to react with it to produce ammonium chloride as a polymerization by-product. In the polymerization reaction, ammonium chloride accounts for as much as 8-12%, and it needs to be thoroughly filtered and removed. Ammonium chloride is in the form of particles and appears milky white and turbid in the polymer slurry system. Plate and frame filters are used in the existing technology to filter it, and the filtered solution is clear and transparent.

[0003] Existing plate-and-frame filters occupy a large footprint, are bulky, cannot operate continuously, have low throughput, and are prone to filter cloth damage. They require manual cleaning, and after replacing the filter cloth, the filter must be reassembled. Residual ammonium chloride crystals on the edges of the plate and frame must also be cleaned. Improper operation can lead to leaks during subsequent filtration due to poor sealing, contaminating the on-site work environment. Furthermore, the polymer slurry can deteriorate and discolor upon contact with air, impacting final product quality. Furthermore, the ammonium chloride filtration cycle is long, and the constant cleaning and maintenance of the plate-and-frame filter compromises overall production efficiency.

[0004] Therefore, a filtering system is needed to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a filter and a filtering system, which do not need to be disassembled and cleaned, ensure the sealing performance during the filtration process, improve the filtration efficiency of the slurry, and effectively ensure product quality.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] The filter includes a tank body, the tank body is provided with a liquid inlet, a liquid outlet, an exhaust hole and a slag discharge port, and a plurality of filter elements are arranged inside the tank body, the plurality of filter elements are arranged in parallel and at intervals inside the tank body along the height direction of the tank body, a liquid injection port is provided outside the tank body, a spray head is provided inside the tank body, the liquid injection port is used to provide cleaning agent to the spray head, and the plurality of spray heads are arranged in a one-to-one correspondence with the plurality of filter elements.

[0008] As an optional technical solution, the filter includes a centrifugal drive component, which is in transmission connection with the filter element and can drive the filter element to rotate.

[0009] As an optional technical solution, the filter further includes a scraper, and a plurality of the scrapers are provided corresponding to the filtering surfaces of the plurality of filter elements, and the scrapers can scrape off the filter cakes on the corresponding filter elements.

[0010] As an optional technical solution, a nitrogen inlet is further provided on the top of the tank body, and the nitrogen inlet is used to input nitrogen into the tank body.

[0011] As an optional technical solution, a plurality of liquid inlets are provided, and the plurality of liquid inlets are spaced apart along the height direction of the tank body.

[0012] As an optional technical solution, the filter further includes an observation mirror, and a plurality of the observation mirrors are arranged on the tank body along the height direction of the tank body, and the observation mirrors are used to observe the cleanliness status of the filter element.

[0013] The utility model also adopts the following technical solutions:

[0014] The filtration system includes a slurry storage tank, a cleaning agent storage tank, a delivery pump, a residual liquid storage tank and a filtrate storage tank, and also includes the filter as described above, the inlet of the slurry storage tank is used to connect to the slurry providing device; the cleaning agent storage tank is used to store cleaning agent, and the injection port of the filter is connected to the cleaning agent storage tank; the inlet of the delivery pump is connected to the outlet of the slurry storage tank through a first pipeline, the inlet of the delivery pump is connected to the outlet of the cleaning agent storage tank through a second pipeline, and the liquid inlet of the filter is connected to the outlet of the delivery pump through a third pipeline; the filtration system also includes a fourth pipeline, one end of the fourth pipeline is connected to the filter. The liquid outlet of the filter, the other end of the fourth pipeline includes a first branch and a second branch, the first branch is connected to the top of the slurry storage tank, and the second branch is connected to the top of the cleaning agent storage tank; the fourth pipeline is provided with a sight glass and a first control valve along the direction away from the filter, and the clarity of the slurry in the fourth pipeline can be observed by observing the sight glass, and the first control valve is used to control the opening and closing of the fourth pipeline; the residual liquid storage tank and the filtrate storage tank are connected to the downstream of the sight glass through the fifth pipeline, and the fifth pipeline is provided with a second control valve, and the second control valve is provided upstream of the residual liquid storage tank and the filtrate storage tank.

[0015] As an optional technical solution, the filtration system also includes a sixth pipeline, one end of the sixth pipeline is connected to the bottom of the filter, and the other end of the sixth pipeline includes a third branch and a fourth branch, the third branch is connected to the top of the slurry storage tank, and the fourth branch is connected to the top of the cleaning agent storage tank.

[0016] As an optional technical solution, a seventh pipeline is provided between the outlet of the filter and the sight glass, and the seventh pipeline is provided with a third control valve;

[0017] And / or, an eighth pipeline is provided between the outlet of the filter and the sight glass, and the eighth pipeline is provided with a fourth control valve.

[0018] As an optional technical solution, the filtration system further includes a receiving tank, which is connected to the slag discharge port of the slurry storage tank and is used to receive the filter cake discharged from the slurry storage tank.

[0019] Beneficial effects of the utility model:

[0020] The utility model discloses a filter, which includes a tank body, the tank body is provided with a liquid inlet, a liquid outlet, an exhaust hole and a slag discharge port, and a filter element is provided inside the tank body, multiple filter elements are arranged in parallel and spaced apart along the height direction of the tank body, a liquid injection port is provided outside the tank body, a spray head is provided inside the tank body, the liquid injection port is used to provide a cleaning agent to the spray head, and the multiple spray heads are provided corresponding to the multiple filter elements. The filter is provided with a filter element inside for filtering slurry, and each filter element is provided with a corresponding spray head, and the spray head is used to spray a cleaning agent onto the filter element. The cleaning agent can flush the filter element, so that the filter cake is discharged through the slag discharge port, which can avoid frequent disassembly and assembly of the filter, and ensure the filtration efficiency and the sealing effect of the filter.

[0021] The utility model also discloses a filtering system, comprising a slurry storage tank, a cleaning agent storage tank, a delivery pump, a residual liquid storage tank and a filtrate storage tank, and also includes the above-mentioned filter, the inlet of the slurry storage tank is used to connect to the slurry providing device; the cleaning agent storage tank is used to store the cleaning agent; the inlet of the delivery pump is connected to the outlet of the slurry storage tank through a first pipeline, and the delivery pump is connected to the outlet of the cleaning agent storage tank through a second pipeline; the liquid inlet of the filter is connected to the outlet of the delivery pump through a third pipeline, and the liquid outlet of the filter is connected to the top of the slurry storage tank through a fourth pipeline, the fourth pipeline is provided with a first branch, the first branch is connected to the top of the cleaning agent storage tank, the liquid injection port of the filter is connected to the cleaning agent storage tank, the fourth pipeline is provided with an observation mirror and a first control valve, the clarity of the slurry in the fourth pipeline can be observed by observing the observation mirror, and the first control valve is used to control the opening and closing of the fourth pipeline; the residual liquid storage tank and the filtrate storage tank are connected to the downstream of the observation mirror through a fifth pipeline, and the fifth pipeline is provided with a second control valve. This filtration system controls the fourth pipeline through the first control valve, allowing the slurry to circulate and filter between the filter and the slurry storage tank, ensuring the effectiveness of slurry filtration and the quality of subsequent products. After slurry filtration is completed, the filtrate can be collected through the fifth pipeline into the filtrate pipeline. When the filter cake in the filter element is thick, the slurry storage tank is closed and the detergent storage tank is opened. The detergent in the detergent storage tank can clean the filter, ensuring the normal operation of the next round of filtration. This filtration system has a good filtration effect and can self-clean the filter, eliminating the need for disassembly and cleaning, thereby improving filtration efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of the filter of the embodiment of the utility model Figure 1 ;

[0023] Figure 2 This is a schematic diagram of the structure of the filter of the embodiment of the utility model Figure 2 ;

[0024] Figure 3 This is a schematic diagram of the structure of the filter of the embodiment of the utility model Figure 3 ;

[0025] Figure 4 This is a schematic diagram of the top structure of the filter according to an embodiment of the present invention;

[0026] Figure 5 This is a cross-sectional view of the filter element and the injection head of an embodiment of the present utility model;

[0027] Figure 6 This is a schematic diagram of the positions of the filter element and the scraper in an embodiment of the utility model;

[0028] Figure 7 is a cross-sectional view of the top structure of the filter according to an embodiment of the present utility model;

[0029] Figure 8 Schematic diagram of a filtration system according to an embodiment of the present invention.

[0030] In the picture:

[0031] 1. Filtration system;

[0032] 10. Filter; 11. Tank; 12. Liquid inlet; 121. Liquid inlet valve; 13. Liquid outlet; 14. Exhaust hole; 141. Exhaust valve; 15. Slag discharge port; 151. Slag discharge valve; 16. Filter element; 17. Liquid injection port; 171. Liquid injection valve; 18. Injection head; 19. Centrifugal drive unit; 110. Scraper; 111. Nitrogen inlet; 1111. Nitrogen valve; 112. Observation mirror;

[0033] 20. Slurry storage tank; 21. First pipeline; 22. First valve; 23. Nitrogen input pipeline; 231. Nitrogen switch valve;

[0034] 30. Cleaning agent storage tank; 31. Second pipeline; 32. Second valve;

[0035] 40. Delivery pump; 41. Third pipeline; 42. Flow meter; 43. Pressure gauge;

[0036] 50. Residual liquid storage tank; 51. Filtrate storage tank; 52. Fifth pipeline; 53. Second control valve; 54. Safety filter;

[0037] 60, fourth pipeline; 61, sight glass; 62, first control valve; 601, first branch; 602, second branch; 603, switch valve;

[0038] 70, sixth pipeline; 71, third valve; 701, third branch; 7011, fourth valve; 702, fourth branch; 7021, fifth valve;

[0039] 80, seventh pipeline; 801, third control valve; 81, eighth pipeline; 802, fourth control valve;

[0040] 90. Receiving tank. DETAILED DESCRIPTION

[0041] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0042] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0043] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0044] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0045] like Figures 1 to 7As shown, a filter 10 is provided in this embodiment, which includes a tank body 11. The tank body 11 is provided with a liquid inlet 12, a liquid outlet 13, an exhaust hole 14 and a slag discharge port 15, and a plurality of filter elements 16 are provided inside the tank body 11. The plurality of filter elements 16 are arranged in parallel and at intervals inside the tank body 11 along the height direction of the tank body 11. A liquid injection port 17 is provided outside the tank body 11, and a spray head 18 is provided inside the tank body 11. The liquid injection port 17 is used to provide cleaning agent to the spray head 18. The plurality of spray heads 18 are arranged in a one-to-one correspondence with the plurality of filter elements 16. Specifically, in this embodiment, the liquid inlet 12 is used for the slurry to enter the tank body 11, and the liquid outlet 13 is used to discharge the filtered slurry. In the process of filling the tank body 11, the exhaust hole 14 can discharge the gas in the tank body 11, thereby improving the efficiency of the slurry entering the tank body 11 and reducing the difficulty of the slurry entering the tank body 11. The tank body 11 is provided with a plurality of filter elements 16 arranged along the height direction of the tank body 11, which can filter the slurry layer by layer to improve the filtering effect. The tank body 11 is provided with a liquid injection port 17 on the outside, and the liquid injection port 17 can inject a cleaning agent into the spray head 18. The spray head 18 and the filter element 16 are correspondingly provided. The spray head 18 sprays the cleaning agent into the filter element 16, which can clean the filter element 16 and ensure the filtering effect of the filter element 16. This filter 10 can be self-cleaning, avoiding personnel from disassembling and cleaning it, ensuring the sealing of the filter 10, and avoiding the reduction of the filtering effect.

[0046] In this embodiment, a liquid inlet valve 121 is provided at the liquid inlet 12 for controlling the opening and closing of the liquid inlet 12; an exhaust valve 141 is provided at the exhaust hole 14 for controlling the opening and closing of the exhaust hole 14; a slag discharge valve 151 is provided at the slag discharge port 15 for controlling the opening and closing of the slag discharge port 15, which will not be repeated here.

[0047] In this embodiment, there are two liquid injection ports 17, and the two liquid injection ports 17 are arranged at intervals, which can improve the injection effect of the cleaning agent and improve the uniformity of the cleaning agent spraying. In other embodiments, the number of liquid injection ports 17 is specifically set according to actual use, which will not be repeated here, and each liquid injection port 17 is provided with a liquid injection valve 171 for controlling the opening and closing of the liquid injection port 17, so as to facilitate the adjustment of the input flow of the cleaning agent and improve the convenience of use.

[0048] The filtration accuracy of the filter 10 in this embodiment is 5-50 μm.

[0049] Furthermore, the filter 10 includes a centrifugal drive member 19, which is in transmission connection with the filter element 16 and can drive the filter element 16 to rotate. Specifically, in this embodiment, the filter element 16 is rotatably disposed within the tank body 11. The centrifugal drive member 19 is a centrifugal drive motor that can drive the filter element 16 to rotate. The filter cake on the filter element 16 can be separated from the filter element 16 by the centrifugal force, thereby facilitating the self-cleaning of the filter element 16.

[0050] For further information, please refer to Figure 6 The filter 10 further includes a scraper 110, and a plurality of scrapers 110 are provided corresponding to the filtering surfaces of the plurality of filter cartridges 16. The scrapers 110 can scrape the filter cake on the corresponding filter cartridges 16. Specifically, in this embodiment, the filter 10 further includes a scraper driving member, the scraper driving member and the scraper 110 are transmission-connected, the scraper 110 is rotatably provided on the tank body 11 via a rotating shaft, and the scraper driving member can drive the scraper 110 to rotate around the rotating shaft by a certain angle, so that the scraper 110 is located on the filtering surface of the filter cartridge 16 or the scraper 110 is located outside the filtering surface of the filter cartridge. When the scraper 110 is located on the filtering surface of the filter cartridge 16, the centrifugal driving member 19 drives the filter cartridge 16 to rotate, and the scraper 110 can scrape the filter cake on the filter cartridge 16 and discharge it under the action of centrifugal force; when the scraper 110 is not needed to work, the scraper 110 is located outside the filtering surface of the filter cartridge 16 to prevent the scraper 110 from affecting the normal filtration of the filter cartridge 16.

[0051] For further information, please refer to Figure 4 , a nitrogen inlet 111 is also provided on the top of the tank body 11, and the nitrogen inlet 111 is used to input nitrogen into the tank body 11. Specifically, in this embodiment, the nitrogen inlet 111 provided on the top of the tank body 11 has two functions. One is that it can input nitrogen into the tank body 11, thereby pushing the slurry to flow downward until all the slurry is discharged from the filter 10, thereby reducing slurry loss; the second is that it can input nitrogen into the tank body 11, so that the tank body 11 is in a positive pressure state to isolate the air, thereby preventing external impurities from entering the tank body 11 and affecting the filtering effect. A nitrogen valve 1111 is provided at the nitrogen inlet 111 for controlling the opening and closing of the nitrogen inlet 111.

[0052] In this embodiment, the purity requirement of nitrogen is ≥99.99%, the pressure requirement is 0.3-0.6 MPa, and it is oil-free, water-free, and impurity-free to ensure the cleanliness and pollution-free nature of the system.

[0053] Furthermore, a plurality of liquid inlets 12 are provided, and the plurality of liquid inlets 12 are spaced apart along the height direction of the tank body 11. Specifically, in this embodiment, three liquid inlets 12 are provided, and the three liquid inlets 12 are spaced apart along the height direction of the tank body 11. This arrangement can not only improve the slurry input efficiency, but also make the slurry in the tank body 11 have better uniformity, and is conducive to forming a filter cake on the filtering surface of the filter element 16, further improving the filtering effect.

[0054] In this embodiment, a liquid inlet valve 121 is provided at each liquid inlet 12 for individually controlling the opening and closing of each liquid inlet 12 .

[0055] Furthermore, the filter 10 further includes an observation mirror 112. A plurality of observation mirrors 112 are provided on the outside of the tank body 11 along the height direction of the tank body 11. The observation mirrors 112 are used to observe the cleanliness of the filter element 16. Specifically, in this embodiment, the observation mirrors 112 can observe the cleanliness of the filter element 16 in the tank body 11, thereby determining whether the filter element 16 needs to be cleaned, thereby ensuring the filtering effect of the filter element 16.

[0056] Preferably, the number of observation mirrors 112 is specifically set according to actual use. In this embodiment, two observation mirrors 112 are provided.

[0057] like Figure 8 As shown, this embodiment also provides a filtration system 1, including a slurry storage tank 20, a cleaning agent storage tank 30, a delivery pump 40, a residual liquid storage tank 50 and a filtrate storage tank 51, and also includes the above-mentioned filter 10, the inlet of the slurry storage tank 20 is used to connect to the slurry providing device; the cleaning agent storage tank 30 is used to store the cleaning agent, and the liquid injection port 17 of the filter 10 is connected to the cleaning agent storage tank 30; the inlet of the delivery pump 40 is connected to the outlet of the slurry storage tank 20 through the first pipeline 21, the inlet of the delivery pump 40 is connected to the outlet of the cleaning agent storage tank 30 through the second pipeline 31, and the liquid inlet 12 of the filter 10 is connected to the outlet of the delivery pump 40 through the third pipeline 41; the filtration system 1 also includes a fourth pipeline 6 0, one end of the fourth pipeline 60 is connected to the liquid outlet 13 of the filter 10, and the other end of the fourth pipeline 60 includes a first branch 601 and a second branch 602. The first branch 601 is connected to the top of the slurry storage tank 20, and the second branch 602 is connected to the top of the cleaning agent storage tank 30; the fourth pipeline 60 is provided with a sight glass 61 and a first control valve 62 along the direction away from the filter 10. The clarity of the slurry in the fourth pipeline 60 can be observed by observing the sight glass 61. The first control valve 62 is used to control the opening and closing of the fourth pipeline 60; the residual liquid storage tank 50 and the filtrate storage tank 51 are connected to the downstream of the sight glass 61 through the fifth pipeline 52, and the fifth pipeline 52 is provided with a second control valve 53.

[0058] Specifically, in this embodiment, the slurry providing device can continuously provide the slurry to be filtered to the slurry storage tank 20, the outlet of the slurry storage tank 20 and the inlet of the delivery pump 40 are connected through the first pipeline 21, and the outlet of the delivery pump 40 is connected to the liquid inlet 12 of the filter 10 through the third pipeline 41. The delivery pump 40 can provide a certain driving force for the slurry output from the slurry storage tank 20, improve the slurry delivery efficiency, and reduce the time for the slurry in the slurry storage tank 20 to be delivered to the filter 10, thereby improving the filtration efficiency; the outlet of the filter 10 is connected to the top of the slurry storage tank 20 through the fourth pipeline 60 and its first branch 601. The fourth pipeline 60 is provided with an observation mirror 112 and a first control valve 62. When the first control valve 62 is opened, the slurry in the slurry storage tank 20 can It enters the filter 10 along the first pipeline 21 and the third pipeline 41, then flows out through the liquid outlet 13 of the filter 10, passes through the fourth pipeline 60 and its first branch 601, and returns to the slurry storage tank 20, forming a filtration cycle. This arrangement enables the slurry to be filtered multiple times until the slurry observed by the observation mirror 112 is clear and clean; the residual liquid storage tank 50 and the filtrate storage tank 51 are connected to the downstream of the sight glass 61 through the fifth pipeline 52, and the fifth pipeline 52 is provided with a second control valve 53 located upstream of the residual liquid storage tank 50 and the filtrate storage tank 51. After the slurry is clear and clean, the first control valve 62 is closed to interrupt the filtration cycle of the slurry, so that the filtered slurry can pass through the second control valve 53 and enter the filtrate storage tank 51 for storage, which is convenient for subsequent production. The cleaning agent storage tank 30 is connected to the inlet of the delivery pump 40 through the second pipeline 31, and the outlet of the filter 10 is connected to the top of the cleaning agent storage tank 30 through the fourth pipeline 60 and its second branch 602, so that the cleaning agent in the cleaning agent storage tank 30 enters the filter 10 after passing through the second pipeline 31 and the third pipeline 41, and then flows out through the liquid outlet 13 of the filter 10, and then flows through the fourth pipeline 60 and its second branch 602 and returns to the cleaning agent storage tank 30, forming a cleaning cycle. The filter element 16 in the filter 10 needs to be cleaned. During washing, the outlet of the slurry storage tank 20 is closed, and the outlet of the cleaning agent storage tank 30 is opened. The cleaning agent flows into the filter 10 under the action of the delivery pump 40, and the cleaning agent storage tank 30 is also connected to the liquid injection port 17 on the tank body 11 of the filter 10, thereby cleaning the filter element 16 in the filter 10 to ensure the filtering effect of the filter 10. After cleaning is completed, the second control valve 53 is opened and the first control valve 62 is closed. The cleaning agent after cleaning passes through the second control valve 53 and enters the residual liquid storage tank 50 for recycling, avoiding waste and pollution of the environment. The filtering system 1 has a good filtering effect and can self-clean the filter 10, avoiding the need for disassembly and cleaning, thereby improving the filtering efficiency.

[0059] Optionally, after the slurry in the slurry storage tank 20 is filtered, unfiltered slurry remains in the filtration system 1. At this time, the delivery pump 40 is turned off, the first control valve 62 is opened, the second control valve 53 is closed, the nitrogen valve 1111 is opened, and nitrogen is input into the filter 10. The nitrogen can push the residual slurry in the filtration system 1 to continue to circulate along the filtration cycle until all the slurries are filtered. The second control valve 53 is opened and the first control valve 62 is closed to transport all the filtered slurries to the filtrate storage tank 51 for storage for subsequent processing; after the filtration system 1 is cleaned, there is residual cleaning agent in the filtration system 1. At this time, the delivery pump 40 is turned off, the second control valve 53 is opened, the first control valve 62 is closed, the nitrogen valve 1111 is opened, and nitrogen is input into the filter 10 so that the nitrogen can push the residual cleaning agent into the residual liquid storage tank 50 to avoid waste and pollution of the environment.

[0060] Optionally, in this embodiment, a switch valve 603 is provided at the inlet of the slurry storage tank 20 for controlling the feeding of the slurry storage tank 20, a first valve 22 is provided at the outlet of the slurry storage tank 20, and the first valve 22 is used to control the discharge of the slurry storage tank 20, and a second valve 32 is provided at the outlet of the cleaning agent storage tank 30, and the second valve 32 is used to control the discharge of the cleaning agent storage tank 30.

[0061] Optionally, in this embodiment, a flow meter 42 and a pressure gauge 43 are further provided in the third pipeline 41 for detecting the flow rate and pressure of the fluid in the third pipeline 41 .

[0062] Optionally, in this embodiment, a safety filter 54 is provided before the residual liquid storage tank 50 and the filtrate storage tank 51 to ensure that the slurry is completely filtered and to avoid inadequate filtration of the slurry that affects the quality of subsequent products.

[0063] Optionally, in this embodiment, both the first branch 601 and the second branch 602 are provided with switch valves 603 for controlling the on-off of the first branch 601 and the second branch 602 respectively.

[0064] Optionally, in this embodiment, a nitrogen input pipeline 23 is provided on the top of the slurry storage tank 20 and the top of the cleaning agent storage tank 30, and a nitrogen switch valve 231 is provided on the nitrogen input pipeline 23. The nitrogen input pipeline 23 can input nitrogen into the slurry storage tank 20 and the cleaning agent storage tank 30, which is used to empty the slurry storage tank 20 and the cleaning agent storage tank 30 to ensure the cleanliness of the filtration system 1 when it is not in working state.

[0065] Furthermore, the filtration system 1 also includes a sixth pipeline 70, one end of the sixth pipeline 70 is connected to the bottom of the filter 10, and the other end of the sixth pipeline 70 includes a third branch 701 and a fourth branch 702, the third branch 701 is connected to the top of the slurry storage tank 20, and the fourth branch 702 is connected to the top of the cleaning agent storage tank 30. Specifically, in this embodiment, a third valve 71 is provided on the sixth pipeline 70, a fourth valve 7011 is provided on the third branch 701, and a fifth valve 7021 is provided on the fourth branch 702. After the slurry in the slurry storage tank 20 is filtered, there will be slurry residue in the filter 10. At this time, the third valve 71, the fourth valve 7011 and the nitrogen valve 1111 are opened to input nitrogen into the filter 10. The nitrogen can push the residual slurry in the filter 10 back to the slurry storage tank 20, thereby avoiding waste of slurry; when the filter system 1 is cleaned, there is residual cleaning agent in the filter 10. At this time, the third valve 71, the fifth valve 7021 and the nitrogen valve 1111 are opened to input nitrogen into the filter 10. The nitrogen can push the residual cleaning agent in the filter 10 back to the cleaning agent storage tank 30, thereby avoiding waste of cleaning agent and at the same time helping to improve the cleanliness of the filter system 1.

[0066] Furthermore, a seventh pipeline 80 is disposed between the outlet of the filter 10 and the sight glass 61, and the seventh pipeline 80 is provided with a third control valve 801; and / or an eighth pipeline 81 is disposed between the outlet of the filter 10 and the sight glass 61, and the eighth pipeline 81 is provided with a fourth control valve 802. Specifically, in this embodiment, the seventh pipeline 80 and the eighth pipeline 81 are disposed between the outlet of the filter 10 and the sight glass 61, and the seventh pipeline 80 and the eighth pipeline 81 are arranged in parallel. The seventh pipeline 80 is provided with the third control valve 801, and the eighth pipeline 81 is provided with the fourth control valve 802. This arrangement allows flow control by controlling the third control valve 801 and the fourth control valve 802, thereby enhancing the flexibility of the filtration system 1.

[0067] Furthermore, the filtration system 1 further includes a receiving tank 90, which is connected to the slag discharge port 15 of the slurry storage tank 20 and is used to receive the filter cake discharged from the slurry storage tank 20. Specifically, in this embodiment, this arrangement can recycle impurities such as the filter cake to avoid environmental pollution.

[0068] The operation process of the filtration system 1 in this embodiment is described in detail below.

[0069] First, the slurry supply device provides the slurry to be filtered to the slurry storage tank 20; then, the first valve 22, all the liquid inlet valves 121 and the exhaust valve 141 of the filter 10 are opened, the delivery pump 40 is turned on, and the other valves are closed. The slurry in the slurry storage tank 20 is delivered to the filter 10 until the filter 10 is full of slurry; then, the first valve 22, all the liquid inlet valves 121, the third control valve 801, the fourth control valve 802 and the first control valve 62 are opened, so that the slurry circulates between the slurry storage tank 20 and the filter 10. This causes a filter cake to form on the filter element 16 in the filter 10, thereby ensuring that the slurry can be fully filtered in the filter 10; then, close the third control valve 801, so that the slurry circulates between the slurry storage tank 20 and the filter 10, and the slurry can be filtered under the combined action of the filter cake and the filter element 16. The state of the slurry in the third pipeline 41 is observed through the sight glass 61 until the slurry is clear and clean; then close the first control valve 62, open the second control valve 53, and transport the filtered slurry to the filtrate storage tank 51 for storage; repeat the above operation.

[0070] If the slurry in the slurry storage tank 20 is not completely filtered, the thickness of the filter cake on the filter element 16 in the filter 10 has reached a preset thickness, the filter element 16 needs to be cleaned first, and then the slurry is circulated and filtered until the slurry is completely filtered and the filter element 16 is cleaned for next use. In this process, it is necessary to first open the nitrogen valve 1111, one of the third control valve 801 and the fourth control valve 802 and the first control valve 62, close the first valve 22, the delivery pump 40 and all the liquid inlet valves 121, input nitrogen into the filter 10, and the nitrogen pushes the residual slurry in the filtration system 1 back to the slurry storage tank 20 to avoid waste; then open the second valve 32, all the liquid inlet valves 121, the third control valve 801, the fourth control valve 802 and the first control valve 62, and the cleaning agent can circulate between the cleaning agent storage tank 30 and the filter 10 to clean the filter element 1 6 is cleaned to loosen the filter cake on the filter element 16, and then the centrifugal drive member 19 is started. The centrifugal drive member 19 can drive the filter element 16 to rotate, and the loose filter cake on the filter element 16 will leave the filter element 16 under the action of centrifugal force and be discharged through the slag discharge port 15; then the observation mirror 112 on the filter 10 is observed to judge the cleaning condition of the filter element 16. If the cleaning is not in place, the scraper drive member is adjusted so that the scraper drive member drives the scraper 110 from the non-working state to the working state, and then the centrifugal drive motor is started to drive the filter element 16 to rotate, and the scraper 110 can scrape the filter cake on the filter element 16. At the same time, under the action of centrifugal force, the filter cake can be thrown off from the periphery of the filter element 16 and discharged through the slag discharge port 15. Then, all the liquid injection valves 171 are opened again, and the cleaning agent is used to flush the filter element 16, thereby improving the cleaning effect of the filter element 16, and then the filtration step is repeated. If the slurry in the slurry storage tank 20 has been filtered, the filter element 16 in the filter 10 also needs to be cleaned for next use. The cleaning process is the same as the cleaning steps and will not be repeated here.

[0071] After the entire filter system 1 is cleaned, the nitrogen valve 1111, the third control valve 801, the fourth control valve 802, and the first control valve 62 are opened, and the second control valve 53 is closed. Nitrogen is input into the filter 10. Nitrogen can push the cleaning agent back to the cleaning agent storage tank 30 for recycling. Alternatively, the nitrogen valve 1111, the third control valve 801, the fourth control valve 802, and the second control valve 53 are opened, and the first control valve 62 is closed. Nitrogen is input into the filter 10. Nitrogen can push the cleaning agent out of the residual liquid storage tank 50 to avoid waste and environmental pollution. Finally, the nitrogen valve 1111 is opened, and the third control valve 801, the fourth control valve 802, all the liquid inlet valves 121, the exhaust valve 141, and all the liquid injection valves 171 are closed, so that the filter 10 is always in a positive pressure state to prevent impurities and other gases from entering the filter 10 and contaminating it, so that it is ready for next use.

[0072] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A filter, characterized in that The filter (10) comprises a tank body (11), the tank body (11) is provided with a liquid inlet (12), a liquid outlet (13), an air vent (14) and a slag discharge port (15), and a plurality of filter elements (16) are provided inside the tank body (11), the plurality of filter elements (16) are arranged in parallel and at intervals inside the tank body (11) along the height direction of the tank body (11), a liquid injection port (17) is provided outside the tank body (11), a spray head (18) is provided inside the tank body (11), the liquid injection port (17) is used to provide a cleaning agent to the spray head (18), and the plurality of spray heads (18) are provided in a one-to-one correspondence with the plurality of filter elements (16).

2. The filter according to claim 1, characterized in that The filter (10) comprises a centrifugal drive member (19), the centrifugal drive member (19) is in transmission connection with the filter element (16), and the centrifugal drive member (19) can drive the filter element (16) to rotate.

3. The filter according to claim 2, characterized in that The filter (10) further comprises a scraper (110), wherein a plurality of the scrapers (110) are provided corresponding to the filtering surfaces of the plurality of filter elements (16) one by one, and the scrapers (110) are capable of scraping off filter cakes on the corresponding filter elements (16).

4. The filter according to claim 3, characterized in that The top of the tank body (11) is also provided with a nitrogen inlet (111), and the nitrogen inlet (111) is used to input nitrogen into the tank body (11).

5. The filter according to claim 4, characterized in that A plurality of the liquid inlets (12) are provided, and the plurality of the liquid inlets (12) are spaced apart along the height direction of the tank body (11).

6. The filter according to claim 5, characterized in that The filter (10) further comprises an observation mirror (112), wherein a plurality of the observation mirrors (112) are arranged on the tank body (11) along the height direction of the tank body (11), and the observation mirrors (112) are used to observe the cleanliness state of the filter element (16).

7. Filtration system, characterized in that, The filtering system (1) comprises a slurry storage tank (20), a cleaning agent storage tank (30), a delivery pump (40), a residual liquid storage tank (50) and a filtrate storage tank (51), and further comprises a filter (10) according to any one of claims 1 to 6, wherein the inlet of the slurry storage tank (20) is used to communicate with a slurry providing device; the cleaning agent storage tank (30) is used to store cleaning agent, and the injection port (17) of the filter (10) is communicated with the cleaning agent storage tank (30); the inlet of the delivery pump (40) is communicated with the outlet of the slurry storage tank (20) through a first pipeline (21), the inlet of the delivery pump (40) is communicated with the outlet of the cleaning agent storage tank (30) through a second pipeline (31), and the liquid inlet (12) of the filter (10) is communicated with the outlet of the delivery pump (40) through a third pipeline (41); the filtering system (1) further comprises a fourth pipeline (60), one end of which is connected to the filter ( 10), the other end of the fourth pipeline (60) includes a first branch (601) and a second branch (602), the first branch (601) is connected to the top of the slurry storage tank (20), and the second branch (602) is connected to the top of the cleaning agent storage tank (30); the fourth pipeline (60) is provided with a sight glass (61) and a first control valve (62) in a direction away from the filter (10), and by observing the sight glass (6 1) The clarity of the slurry in the fourth pipeline (60) can be observed, and the first control valve (62) is used to control the opening and closing of the fourth pipeline (60); the residual liquid storage tank (50) and the filtrate storage tank (51) are connected to the downstream of the sight glass (61) through the fifth pipeline (52), and the fifth pipeline (52) is provided with a second control valve (53), and the second control valve (53) is provided upstream of the residual liquid storage tank (50) and the filtrate storage tank (51).

8. The filtration system according to claim 7, characterized in that The filtration system (1) further comprises a sixth pipeline (70), one end of which is connected to the bottom of the filter (10), and the other end of which comprises a third branch (701) and a fourth branch (702), wherein the third branch (701) is connected to the top of the slurry storage tank (20), and the fourth branch (702) is connected to the top of the cleaning agent storage tank (30).

9. The filtration system according to claim 7, characterized in that A seventh pipeline (80) is provided between the outlet of the filter (10) and the sight glass (61), and the seventh pipeline (80) is provided with a third control valve (801); And / or, an eighth pipeline (81) is provided between the outlet of the filter (10) and the sight glass (61), and the eighth pipeline (81) is provided with a fourth control valve (802).

10. The filtration system according to claim 7, characterized in that The filtration system (1) further comprises a receiving tank (90), wherein the receiving tank (90) is connected to the slag discharge port (15) of the slurry storage tank (20) and is used to receive the filter cake discharged from the slurry storage tank (20).

Images