阅读说明：本技术 一种固液过滤分离装置及方法 (Solid-liquid filtering and separating device and method ) 是由 杨玉奇 赵中义 党沙沙 熊辉 刘连强 尉馨婷 刘焱 尤静辉 周杨 纪玉杰 李蒙 于 2020-04-22 设计创作，主要内容包括：本申请公开了一种固液过滤分离装置及方法,该装置包括：泵前主过滤器(1)、增压泵(2)以及分离器(3)；其中,泵前主过滤器(1),用于将待过滤的固液混合物进行过滤分离,包括第一过滤罐(11),驱动系统(12),滤网(13)以及刮刀(14)；所述增压泵(2),设置于所述泵前主过滤器(1)与所述分离器(3)之间,用于将所述泵前主过滤器(1)过滤后的固液混合物进行增压处理,并将所述过滤后的固液混合物输入给所述分离器(3)；所述分离器(3),用于将所述过滤后的固液混合物进行再次过滤,并将再次过滤后的固液混合物进行分离,得到分离后的液体和固体颗粒。本申请解决了现有技术中固液过滤分离装置的稳定性较差的技术问题。(The application discloses solid-liquid filtering and separating device and method, the device includes: a pre-pump main filter (1), a booster pump (2) and a separator (3); the pre-pump main filter (1) is used for filtering and separating a solid-liquid mixture to be filtered and comprises a first filter tank (11), a driving system (12), a filter screen (13) and a scraper (14); the booster pump (2) is arranged between the pre-pump main filter (1) and the separator (3) and is used for boosting the solid-liquid mixture filtered by the pre-pump main filter (1) and inputting the filtered solid-liquid mixture to the separator (3); and the separator (3) is used for filtering the filtered solid-liquid mixture again and separating the solid-liquid mixture after filtering again to obtain separated liquid and solid particles. The application has solved the relatively poor technical problem of stability of solid-liquid filtering separation device among the prior art.)

1. A solid-liquid filtering separation device, characterized by comprising: a pre-pump main filter (1), a booster pump (2) and a separator (3); wherein the content of the first and second substances,

the pre-pump main filter (1) is used for filtering and separating a solid-liquid mixture to be filtered and comprises a first filter tank (11), a driving system (12), a filter screen (13) and a scraper (14); the first filter tank (11) comprises a first mixture inlet (111) and a first outlet (112), and is used for inputting the solid-liquid mixture to be filtered from the first mixture inlet (111) and outputting the filtered solid-liquid mixture from the first outlet (112); the filter screen (13) is positioned inside the first filter tank (11) and is used for filtering the solid-liquid mixture to be filtered; the scraper (14) is arranged against the filter screen (13) and is used for removing solid particles filtered on the filter screen (13); the driving system (12) is connected with the scraper (14) and is positioned outside the first filter tank (11) and used for controlling the scraper (14) to automatically remove the solid particles filtered on the filter screen (13) so that the solid particles flow into the bottom of the first filter tank (11) along with part of the liquid;

the booster pump (2) is arranged between the pre-pump main filter (1) and the separator (3) and is used for boosting the solid-liquid mixture filtered by the pre-pump main filter (1) and inputting the filtered solid-liquid mixture to the separator (3);

and the separator (3) is used for filtering and separating the filtered solid-liquid mixture again to obtain separated liquid and solid particles, wherein the solid particles flow into the bottom of the separator (3) along with part of the liquid.

2. The apparatus of claim 1, wherein the apparatus further comprises: a standing device (4), a first control valve (5), a pre-pump secondary filter (6) and a second control valve (7); wherein the content of the first and second substances,

the standing device (4) is arranged at the outer bottom of the separator (3) and is used for filtering and separating solid particles and partial liquid flowing into the bottom of the separator (3) and inputting the filtered and separated liquid into the booster pump (2);

the first control valve (5) is arranged between the standing device (4) and the booster pump (2) and is used for controlling the flow rate of the fluid flowing into the booster pump (2) from the standing device (4);

the secondary pump filter (6) is arranged outside the first filter tank (11) and connected with the bottom of the first filter tank (11) and is used for filtering and separating solid particles and partial liquid flowing into the bottom of the first filter tank (11);

and the second control valve (7) is arranged between the first filter tank (11) and the front sub-pump filter (6) and is used for controlling the flow rate of the fluid flowing into the front sub-pump filter (6) from the first filter tank (11).

3. The device according to claim 2, characterized in that the resting means (4) comprise a second filtering tank (41), a resting filter sieve (42), a resting wiper (43) and a resting drive system (44); wherein the content of the first and second substances,

the second filter tank (41) comprises a second mixture inlet (411), a first liquid outlet (412) and a first solid outlet (413), and is used for inputting the solid particles and part of liquid flowing into the bottom of the separator (3) from the second mixture inlet (411), outputting the separated liquid from the liquid outlet (412) and outputting the separated solid particles from the solid outlet (413);

the static filter screen (42) is positioned inside the second filter tank (41) and is used for filtering and separating the solid particles and partial liquid flowing into the bottom of the separator (3);

the static device scraping brush (43) is arranged close to the static device filter screen (42) and is used for removing solid particles filtered on the static device filter screen (42);

the static device driving system (44) is connected with the static device scraping brush (43) and is positioned outside the second filtering tank (41) and used for controlling the static device scraping brush (43) to automatically remove the solid particles filtered on the static device filtering screen (42).

4. The device according to claim 2, characterized in that the pre-pump secondary filter (6) comprises a third filter tank (61) and a pre-pump secondary filter screen (62); wherein the content of the first and second substances,

the third filtering tank (61) comprises a third mixture inlet (611), a second liquid outlet (612) and a second solid outlet (613) and is used for inputting the solid particles and part of liquid flowing into the bottom of the first filtering tank (11) from the third mixture inlet (611), outputting the separated liquid from the second liquid outlet (612) and outputting the separated solid particles from the second solid outlet (613);

and the pump front auxiliary filter screen (62) is arranged inside the third filter tank (61) and is used for filtering and separating solid particles and partial liquid flowing into the bottom of the first filter tank (11).

5. A solid-liquid filtering separation method applied to the apparatus according to any one of the above 1 to 4, comprising:

the method comprises the following steps that a main filter before a pump carries out primary filtration on an input solid-liquid mixture according to a preset first separation precision range to obtain a first solid-liquid mixture and a second solid-liquid mixture after filtration, wherein the first solid-liquid mixture contains filtered solid particles;

and the main filter before the pump outputs the second solid-liquid mixture to the booster pump, so that the booster pump boosts the second solid-liquid mixture and sends the boosted second solid-liquid mixture to the separator, the separator performs second separation on the boosted second solid-liquid mixture according to a preset second separation precision range to obtain a first liquid and a third solid-liquid mixture, and the third solid-liquid mixture is input to the standing device, so that the standing device performs secondary filtration and separation on the third solid-liquid mixture according to a preset third separation precision range.

6. The method of claim 5, wherein the pre-pump main filter performs a first filtering of the incoming solid-liquid mixture according to a preset first separation accuracy range, comprising:

a filter screen in the main filter before the pump filters an input solid-liquid mixture according to a preset first separation precision range to separate solid particles, wherein the solid particles are attached to the filter screen;

and a scraper in the main filter before the pump automatically removes the solid particles attached to the filter screen under the control of a driving system.

7. The method of claim 5 or 6, wherein the predetermined first separation accuracy range is (4mm, 10 mm).

8. The method according to claim 5 or 6, wherein the predetermined second separation accuracy and the predetermined third separation accuracy both range (50 μm, 300 μm).

9. The method of claim 5 or 6, further comprising:

and the main filter before the pump inputs the first solid-liquid mixture to the auxiliary filter before the pump, so that the auxiliary filter before the pump performs filtration and separation on the first solid-liquid mixture again according to a preset fourth separation precision range.

10. The method of claim 9, wherein the predetermined fourth separation accuracy range is (1.5mm, 4 mm).

Technical Field

The application relates to the technical field of solid-liquid separation, in particular to a solid-liquid filtering and separating device and method.

Background

In the process of life or production, various solid-liquid mixtures are inevitably contacted, and the separation of the solid-liquid mixtures is an important component in the separation technology. At present, a common solid-liquid separation device is mainly provided with a filter through a solid-liquid input/output port to realize solid-liquid filtration and separation, a common filter usually adopts a filter element to filter particles with different sizes, and the filtered particles are attached to the filter element. In order to ensure the filtering effect of the filter, solid particles attached to the filter element are regularly removed in a manual mode, or the filter element is replaced in a manual mode. However, for the solid-liquid separation device with higher separation precision, because the separation precision is higher, namely the size of the filtered particles is smaller, in the solid-liquid filtering and separating process, a large amount of solid particles are attached to the filter element, so that the filter element is easy to block, the filter element is periodically cleaned in a manual mode in the prior art, the manual workload is large, and because a large amount of solid particles are attached to the filter element, if the manual mode cannot be used for timely cleaning, the pressure difference before and after the solid-liquid filtering and separating device filters is too large, the stability of the solid-liquid filtering and separating device is poor.

Disclosure of Invention

The technical problem that this application was solved is: the solid-liquid filtering and separating device comprises a main filter, a scraper, a filter screen, a driving system and a filter screen, wherein the filter screen is arranged in the main filter, the scraper is arranged in the main filter, the driving system is arranged in the main filter, the scraper is arranged in the main filter, and the scraper is used for driving the filter screen to move in the main filter. Therefore, through the driving system, the scraper is controlled to automatically clear solid particles attached to the filter screen, so that the workload of workers is reduced, the phenomenon that the pressure difference of the solid-liquid filtering and separating device before and after filtration is overlarge due to the fact that the solid-liquid filtering and separating device cannot be manually cleaned in time is avoided, and the stability of the solid-liquid filtering and separating device is improved.

In a first aspect, an embodiment of the present application provides a solid-liquid filtering separation device, including: a pre-pump main filter, a booster pump and a separator; wherein the content of the first and second substances,

the pre-pump main filter is used for filtering and separating a solid-liquid mixture to be filtered and comprises a first filter tank, a driving system, a filter screen and a scraper; the first filter tank comprises a first mixture inlet and a first outlet, and is used for inputting the solid-liquid mixture to be filtered from the first mixture inlet and outputting the filtered solid-liquid mixture from the first outlet; the filter screen is positioned in the first filtering tank and used for filtering the solid-liquid mixture to be filtered; the scraper is arranged close to the filter screen and used for removing solid particles filtered on the filter screen; the driving system is connected with the scraper and is positioned outside the first filter tank and used for controlling the scraper to automatically remove the solid particles filtered on the filter screen, so that the solid particles flow into the bottom of the first filter tank along with part of the liquid;

the booster pump is arranged between the pre-pump main filter and the separator and is used for boosting the solid-liquid mixture filtered by the pre-pump main filter and inputting the filtered solid-liquid mixture to the separator;

and the separator is used for filtering and separating the filtered solid-liquid mixture again to obtain separated liquid and solid particles, wherein the solid particles flow into the bottom of the separator along with part of the liquid.

In the scheme that this application embodiment provided, solid-liquid filters separator filters the solid-liquid mixture of input through the filter screen in the main filter before the pump in filtering process to through actuating system, the control scraper carries out automatic clear to the adnexed solid particle on the filter screen. Therefore, through the driving system, the scraper is controlled to automatically clear solid particles attached to the filter screen, so that the workload of workers is reduced, the phenomenon that the pressure difference of the solid-liquid filtering and separating device before and after filtration is overlarge due to the fact that the solid-liquid filtering and separating device cannot be manually cleaned in time is avoided, and the stability of the solid-liquid filtering and separating device is improved.

Optionally, the apparatus further comprises: the device comprises a standing device, a first control valve, a front auxiliary pump filter and a second control valve; wherein the content of the first and second substances,

the standing device is arranged at the outer bottom of the separator and is used for filtering and separating solid particles and partial liquid flowing into the bottom of the separator and inputting the filtered and separated liquid into the booster pump;

the first control valve is arranged between the standing device and the booster pump and is used for controlling the flow rate of fluid flowing into the booster pump from the standing device;

and the pump front auxiliary filter is arranged outside the first filter tank, is connected with the bottom of the first filter tank and is used for filtering and separating solid particles and partial liquid flowing into the bottom of the first filter tank.

The second control valve is arranged between the first filter tank and the front auxiliary filter of the pump and used for controlling the flow of the fluid flowing into the front auxiliary filter of the pump from the first filter tank.

Optionally, the standing device comprises a second filter tank, a standing device filter screen, a standing device scraping brush and a standing device driving system; wherein the content of the first and second substances,

the second filter tank comprises a second mixture inlet, a first liquid outlet and a first solid outlet, and is used for inputting the solid particles and part of liquid flowing into the bottom of the separator from the second mixture inlet, outputting the separated liquid from the liquid outlet and outputting the separated solid particles from the solid outlet;

the filter screen of the standing device is positioned in the second filtering tank and is used for filtering and separating the solid particles and part of liquid flowing into the bottom of the separator;

the static device scraping brush is arranged close to the static device filter screen and used for removing solid particles filtered on the static device filter screen;

the device driving system stands, with it scrapes the brush and is connected to stand, and is located the second filters the jar outside, is used for control it scrapes brush self-cleaning to stand the ware filter screen and goes up filterable solid particle.

Optionally, the pre-pump secondary filter comprises a third filter tank and a pre-pump secondary filter screen; wherein the content of the first and second substances,

the third filter tank comprises a third mixture inlet, a second liquid outlet and a second solid outlet, and is used for inputting the solid particles and part of liquid flowing into the bottom of the first filter tank from the third mixture inlet, outputting the separated liquid from the second liquid outlet and outputting the separated solid particles from the second solid outlet;

and the filter screen of the auxiliary filter before the pump is arranged in the third filter tank and is used for filtering and separating solid particles and partial liquid flowing into the bottom of the first filter tank.

In a second aspect, the present embodiment provides a solid-liquid filtration separation method, which is applied to the apparatus described in the first aspect, and the method includes:

the method comprises the following steps that a main filter before a pump carries out primary filtration on an input solid-liquid mixture according to a preset first separation precision range to obtain a first solid-liquid mixture and a second solid-liquid mixture after filtration, wherein the first solid-liquid mixture contains filtered solid particles;

and the main filter before the pump outputs the second solid-liquid mixture to the booster pump, so that the booster pump boosts the second solid-liquid mixture and sends the boosted second solid-liquid mixture to the separator, the separator performs second separation on the boosted second solid-liquid mixture according to a preset second separation precision range to obtain a first liquid and a third solid-liquid mixture, and the third solid-liquid mixture is input to the standing device, so that the standing device performs secondary filtration and separation on the third solid-liquid mixture according to a preset third separation precision range.

Optionally, the pre-pump main filter performs a first filtering on the input solid-liquid mixture according to a preset first separation precision range, and includes:

a filter screen in the main filter before the pump filters an input solid-liquid mixture according to a preset first separation precision range to separate solid particles, wherein the solid particles are attached to the filter screen;

and a scraper in the main filter before the pump automatically removes the solid particles attached to the filter screen under the control of a driving system.

Optionally, the preset first separation accuracy range is (4mm, 10 mm).

Optionally, the preset second separation accuracy and the preset third separation accuracy range are both (50 μm, 300 μm).

Optionally, the method further comprises:

and the main filter before the pump inputs the first solid-liquid mixture to the auxiliary filter before the pump, so that the auxiliary filter before the pump performs filtration and separation on the first solid-liquid mixture again according to a preset fourth separation precision range.

Optionally, the preset fourth separation accuracy range is (1.5mm, 4 mm).

In a third aspect, embodiments of the present application provide a main pre-pump filter, including:

the device comprises a filtering unit, a first separation precision range and a second separation precision range, wherein the filtering unit is used for filtering an input solid-liquid mixture for the first time according to the preset first separation precision range to obtain a first filtered solid-liquid mixture and a second filtered solid-liquid mixture, and the first solid-liquid mixture contains filtered solid particles;

and the output unit is used for outputting the second solid-liquid mixture to a booster pump, so that the booster pump boosts the second solid-liquid mixture and sends the boosted second solid-liquid mixture to a separator, the separator performs second filtration and separation on the boosted second solid-liquid mixture according to a preset second separation precision range to obtain a first liquid and a third solid-liquid mixture, and the third solid-liquid mixture is input to a standing device, so that the standing device performs filtration and separation on the third solid-liquid mixture again according to a preset third separation precision range.

Optionally, the filtering unit is specifically configured to:

filtering an input solid-liquid mixture according to a preset first separation precision range to separate solid particles, wherein the solid particles are attached to the filter screen;

and automatically removing the solid particles attached to the filter screen under the control of a driving system.

Optionally, the preset first separation accuracy range is (4mm, 10 mm).

Optionally, the preset second separation accuracy and the preset third separation accuracy range are both (50 μm, 300 μm).

Optionally, the output unit is further configured to: and inputting the first solid-liquid mixture to a pre-pump secondary filter, so that the pre-pump secondary filter performs filtration and separation on the first solid-liquid mixture again according to a preset fourth separation precision range.

Optionally, the preset fourth separation accuracy range is (1.5mm, 4 mm).

Drawings

FIG. 1 is a schematic structural diagram of a solid-liquid filtering and separating device provided in an embodiment of the present application;

fig. 2 is a schematic structural diagram of a standing device according to an embodiment of the present disclosure;

FIG. 3 is a schematic diagram of a pre-pump secondary filter according to an embodiment of the present disclosure;

FIG. 4 is a schematic flow chart of a solid-liquid filtering and separating method provided in the embodiments of the present application;

fig. 5 is a schematic structural diagram of a main pre-pump filter according to an embodiment of the present disclosure.

Detailed Description

A solid-liquid filtering separator provided by the embodiments of the present application is further described in detail with reference to the attached drawings, and referring to FIG. 1, the solid-liquid filtering separator comprises: a pre-pump main filter 1, a booster pump 2 and a separator 3; wherein the content of the first and second substances,

the pre-pump main filter 1 is used for filtering and separating a solid-liquid mixture to be filtered and comprises a first filter tank 11, a driving system 12, a filter screen 13 and a scraper 14; the first filter tank 11 comprises a first mixture inlet 111 and a first outlet 112, and is used for inputting the solid-liquid mixture to be filtered from the first mixture inlet 111 and outputting the filtered solid-liquid mixture from the first outlet 112; the filter screen 13 is positioned inside the first filter tank 11 and is used for filtering the solid-liquid mixture to be filtered; the scraper 14 is arranged against the screen 13 and is used for removing solid particles filtered on the screen 13; the driving system 12 is connected with the scraper 14 and is located outside the first filter tank 11, and is used for controlling the scraper 14 to automatically remove the solid particles filtered on the filter screen 13, so that the solid particles flow into the bottom of the first filter tank 11 with part of the liquid;

the booster pump 2 is arranged between the pre-pump main filter 1 and the separator 3, and is used for boosting the solid-liquid mixture filtered by the pre-pump main filter 1 and inputting the filtered solid-liquid mixture to the separator 3;

the separator 3 is configured to perform filtration separation on the filtered solid-liquid mixture again to obtain separated liquid and solid particles, where the solid particles flow into the bottom of the separator 3 along with a part of the liquid.

Specifically, in the solution provided in the embodiments of the present application, the arrows indicate the enlarged view of the pre-pump main filter 1. The first mixture inlet 111 may be disposed at a left position of the first filter tank 11 and the first outlet 112 is disposed at a right position of the first filter tank 11, wherein the first mixture inlet 111 is spaced apart from the ground more than the first outlet 112 is spaced apart from the ground. The separation accuracy of the filter screen 13, i.e. the size of the solid particles to be filtered, can be selected according to the relevant parameters of the booster pump 2. The separator 3 may be a hydrocyclone or another separator, and is not limited as long as the apparatus having a solid-liquid separation function satisfies the requirements of the embodiments of the present application.

The operation principle of the solid-liquid filtering-separating device is briefly described below.

First, a solid-liquid mixture to be filtered is input into the first filtration tank 11 through the first mixture inlet 111, and then, the solid-liquid mixture to be filtered flows through the filter screen 13, the filter screen 13 filters the solid-liquid mixture to be filtered according to the separation precision of the filter screen 13 to obtain the solid-liquid mixture after filtering and filtered solid particles, for example, the separation precision range of the filter screen 13 is (4mm, 10mm), wherein, the separation precision range refers to the size range of the filtered solid particles, the filtered solid-liquid mixture enters and exits the booster pump 2 through the first outlet 112, and the filtered solid particles are attached on the filter screen 3, the drive system 12 may then periodically or periodically generate control commands according to a preset driver, and sends the control command to the scraper 14, and the scraper 14 automatically removes the solid particles filtered on the screen 13 according to the control command. The solid particles removed from the sieve 13 fall with part of the liquid to the bottom of the first filter tank 11 under the influence of gravity. It should be understood that the solution provided by the embodiment of the present application may be that the driving system 12 and the doctor blade 14 are connected by a wired connection or other means, and the requirement of the embodiment of the present application is satisfied as long as the data interaction between the driving system 12 and the doctor blade 14 is possible, and is not limited herein.

Further, after the solid-liquid mixture filtered by the pre-pump main filter 1 is input to the booster pump 2, the booster pump 2 performs a boosting treatment on the filtered solid-liquid mixture, and the filtered solid-liquid mixture is input to the separator 3.

Further, after the filtered solid-liquid mixture is fed into the separator 3, the separator 3 performs centrifugal separation on the filtered solid-liquid mixture at the center thereof according to a preset separation accuracy, for example, the separation accuracy is (50 μm, 300 μm), and separated liquid and solid particles are obtained, and the solid particles fall into the bottom of the separator 3 along with part of the liquid under the action of gravity.

Further, in order to reduce losses in the solid-liquid mixture to be filtered. In one possible implementation, the apparatus further includes: a standing device 4, a first control valve 5, a pre-pump secondary filter 6 and a second control valve 7; the standing device 4 is arranged at the outer bottom of the separator 3, and is used for filtering and separating solid particles and part of liquid flowing into the bottom of the separator 3, and inputting the filtered and separated liquid into the booster pump 2;

the first control valve 5 is arranged between the standing device 4 and the booster pump 2, and is used for controlling the flow rate of the fluid flowing into the booster pump 2 from the standing device 4; the pump front auxiliary filter 6 is arranged outside the first filter tank 11, connected with the bottom of the first filter tank 11, and used for filtering and separating solid particles and partial liquid flowing into the bottom of the first filter tank 11. The second control valve 7 is disposed between the first canister 11 and the pre-pump sub-filter 6, and is configured to control a flow rate of the fluid flowing into the pre-pump sub-filter 6 from the first canister 11.

Referring to fig. 2, in a possible implementation, the resting device 4 comprises a second filtering tank 41, a resting device sieve 42, a resting device scraping brush 43 and a resting device driving system 44; wherein the second filter tank 41 comprises a second mixture inlet 411, a first liquid outlet 412 and a first solid outlet 413, and is used for inputting the solid particles and part of liquid flowing into the bottom of the separator 3 from the second mixture inlet 411, outputting the separated liquid from the liquid outlet 412 and outputting the separated solid particles from the solid outlet 413; the static filter screen 42 is positioned inside the second filter tank 41 and is used for filtering and separating the solid particles and part of liquid flowing into the bottom of the separator 3; the static device scraping brush 43 is arranged close to the static device filter screen 42 and used for removing solid particles filtered on the static device filter screen 42; and the static device driving system 44 is connected with the static device scraping brush 43, is positioned outside the second filter tank 41, and is used for controlling the static device scraping brush 43 to automatically remove the solid particles filtered on the static device filter screen 42.

Specifically, in the solution provided in the embodiment of the present application, the bottom of the separator 3 is provided with an outlet, the outlet is connected to the second mixture inlet 411 in the second filtering tank 41, the solid particles and a part of the liquid falling into the bottom of the separator 3 are input into the standing device 4, and the solid-liquid mixture is filtered again by the standing device screen 42 in the standing device 4, and the filtered solid particles will adhere to the standing device screen 42, wherein the separation precision of the standing device screen 42 can be selected according to actual requirements, for example, the separation precision of the standing device screen 42 can be (50 μm, 300 μm); then, the still standing device driving system 44 periodically or periodically generates a control command according to a preset driving program, and sends the control command to the still standing device scraping brush 43, the still standing device scraping brush 43 automatically removes the solid particles filtered on the still standing device strainer 42 according to the control command, the solid particles are output through the first solid outlet 413, and the separated liquid is input to the booster pump 2 again through the first liquid outlet 412.

Further, referring to fig. 3, in one possible implementation, the pre-pump secondary filter 6 includes a third filter tank 61 and a pre-pump secondary filter screen 62; wherein the third filter tank 61 comprises a third mixture inlet 611, a second liquid outlet 612 and a second solids outlet 613, and is used for inputting the solid particles and part of the liquid flowing into the bottom of the first filter tank 11 from the third mixture inlet 611, outputting the separated liquid from the second liquid outlet 612 and outputting the separated solid particles from the second solids outlet 613; and the pump front sub-filter screen 62 is arranged inside the third filter tank 61 and is used for filtering and separating solid particles and partial liquid flowing into the bottom of the first filter tank 11.

Specifically, in the solution provided in this embodiment of the present application, an outlet is provided at the bottom of the main pre-pump filter 1, and the outlet is connected to the third mixture inlet 611 in the third filter tank 61, the solid particles and a part of the liquid falling into the bottom of the main pre-pump filter 1 are input into the sub-pump filter 6, and the solid-liquid mixture is filtered again by standing the sub-pump filter screen 62 in the sub-pump filter 6, wherein the separation precision of the sub-pump filter screen 62 can be selected according to actual requirements, for example, the separation precision of the sub-pump filter screen 62 can be (1.5mm, 4mm), the filtered solid particles will attach to the sub-pump filter screen 62, and then the filtered solid particles are output through the second solid outlet 613, and the filtered liquid is output through the second liquid outlet 612.

Further, in order to control the feeding of the solid particles and part of the liquid at the bottom of the pre-pump main filter 1 into the pre-pump auxiliary filter 6, a second control valve 7 may be provided between the bottom of the pre-pump main filter 1 and the pre-pump auxiliary filter 6, and the feeding of the solid particles and part of the liquid at the bottom of the pre-pump main filter 1 into the pre-pump auxiliary filter 6 may be controlled by opening or closing the second control valve 7, for example, the second control valve 7 may be opened at a frequency of 1 time/day for a period of 30 seconds.

In the scheme provided by the embodiment of the application, the solid-liquid filtering and separating device filters the input solid-liquid mixture through the filter screen 13 in the main filter 1 before the pump in the filtering process, and controls the scraper 14 to automatically remove solid particles attached to the filter screen 13 through the driving system 12. Therefore, the driving system 12 controls the scraper 14 to automatically remove the solid particles attached to the filter screen 13, so that not only is the workload of workers reduced, but also the problem that the pressure difference before and after filtration of the solid-liquid filtering and separating device is too large due to the fact that the solid-liquid filtering and separating device cannot be manually cleaned in time is avoided, and the stability of the solid-liquid filtering and separating device is further improved.

Referring to fig. 4, the embodiment of the present application provides a solid-liquid filtration separation method, which is applied to the apparatus described in fig. 1, and the specific steps of the method are as follows:

step 401, a pre-pump main filter performs first filtration on an input solid-liquid mixture according to a preset first separation precision range to obtain a first filtered solid-liquid mixture and a second filtered solid-liquid mixture, wherein the first solid-liquid mixture contains filtered solid particles.

And 402, outputting the second solid-liquid mixture to a booster pump by the main filter before the pump, so that the booster pump boosts the second solid-liquid mixture and sends the second solid-liquid mixture to a separator, so that the separator performs second filtration and separation on the boosted second solid-liquid mixture according to a preset separation precision range to obtain a first liquid and a third solid-liquid mixture, and inputting the third solid-liquid mixture to a standing device, so that the standing device performs filtration and separation on the third solid-liquid mixture again according to a preset third separation precision range.

Optionally, the pre-pump main filter performs a first filtering on the input solid-liquid mixture according to a preset first separation precision range, and includes:

a filter screen in the main filter before the pump filters an input solid-liquid mixture according to a preset first separation precision range to separate solid particles, wherein the solid particles are attached to the filter screen;

and a scraper in the main filter before the pump automatically removes the solid particles attached to the filter screen under the control of a driving system.

Optionally, the preset first separation accuracy range is (4mm, 10 mm).

Optionally, the preset second separation accuracy and the preset third separation accuracy range are both (50 μm, 300 μm).

Optionally, the method further comprises: and the pre-pump main filter inputs the first solid-liquid mixture into the pre-pump auxiliary filter, so that the pre-pump auxiliary filter performs filtration and separation on the first solid-liquid mixture again according to a preset fourth separation precision range.

Optionally, the preset fourth separation accuracy range is (1.5mm, 4 mm).

Specifically, the process of the solid-liquid filtering and separating method is the same as the separating process of the solid-liquid filtering and separating device shown in fig. 1, and is not described herein again.

Based on the same inventive concept as the method shown in fig. 4, the embodiment of the present application provides a main pre-pump filter, referring to fig. 5, which includes:

a filtering unit 501, configured to perform first filtering on an input solid-liquid mixture according to a preset first separation accuracy range to obtain a first filtered solid-liquid mixture and a second filtered solid-liquid mixture, where the first solid-liquid mixture includes filtered solid particles;

an output unit 502, configured to output the second solid-liquid mixture to a booster pump, so that the booster pump boosts the second solid-liquid mixture and sends the boosted second solid-liquid mixture to a separator, so that the separator performs second filtration and separation on the boosted second solid-liquid mixture according to a preset separation accuracy range, to obtain a first liquid and a third solid-liquid mixture, and inputs the third solid-liquid mixture to a static device, so that the static device performs filtration and separation on the third solid-liquid mixture again according to a preset third separation accuracy range.

Optionally, the filtering unit 501 is specifically configured to:

filtering an input solid-liquid mixture according to a preset first separation precision range to separate solid particles, wherein the solid particles are attached to the filter screen;

and automatically removing the solid particles attached to the filter screen under the control of a driving system.

Optionally, the preset first separation accuracy range is (4mm, 10 mm).

Optionally, the preset second separation accuracy and the preset third separation accuracy range are both (50 μm, 300 μm).

Optionally, the output unit 502 is further configured to: and inputting the first solid-liquid mixture into a pre-pump secondary filter, so that the pre-pump secondary filter performs filtration and separation on the first solid-liquid mixture again according to a preset fourth separation precision range.

Optionally, the preset fourth separation accuracy range is (1.5mm, 4 mm).

The matters not described in detail in the present specification belong to the common general knowledge of those skilled in the art.