CN220214446U

CN220214446U - Clean recovery unit

Info

Publication number: CN220214446U
Application number: CN202321295369.0U
Authority: CN
Inventors: 李建辉; 张东; 田凯龙; 张凯; 杨鹏; 韩朝晖; 刘科谦; 王忠群
Original assignee: Shaanxi Longi Solar Technology Co Ltd
Current assignee: Shaanxi Longi Solar Technology Co Ltd
Priority date: 2023-05-25
Filing date: 2023-05-25
Publication date: 2023-12-22
Anticipated expiration: 2033-05-25

Abstract

The utility model provides a cleaning and recycling device. The dirt absorbing and recycling component of the cleaning and recycling device comprises a dirt absorbing port, a liquid outlet pipeline and a clean liquid extracting piece, wherein the dirt absorbing port is arranged below the liquid level in the washing tower, one end of the liquid outlet pipeline is connected with the dirt absorbing port, the other end of the liquid outlet pipeline is connected with the clean liquid extracting piece, suspended matters in the washing tower absorbed by the dirt absorbing port flow into the clean liquid extracting piece through the liquid outlet pipeline, and the clean liquid extracting piece is used for filtering and extracting impurities in the suspended matters; the recovery conveying assembly comprises a clean liquid collecting box body, a liquid return pipeline and a communicating pipeline, one end of the communicating pipeline is connected with the clean liquid extracting part, the other end of the communicating pipeline is connected with the clean liquid collecting box body, the first end of the liquid return pipeline is connected with the clean liquid collecting box body, the second end of the liquid return pipeline is positioned below the liquid level in the washing tower, liquid in the clean liquid extracting part flows into the clean liquid collecting box body to be collected through the communicating pipeline, and liquid collected in the clean liquid collecting box body flows into the washing tower through the liquid return pipeline.

Description

Clean recovery unit

Technical Field

The utility model relates to the technical field of waste liquid recovery equipment, in particular to a cleaning recovery device.

Background

In the treatment process of a nitrogen oxide waste gas washing tower system in the acid etching process of a photovoltaic cell, a large amount of nitrate, sulfate and other salts and sulfur simple substances are generated in the washing tower, the various salts can be separated out and crystallized due to concentration, temperature and other changes, the sulfur simple substances are suspended in circulating spray liquid of the washing tower and react with sodium sulfide to generate polysulfide which is accumulated on the inner side of a water tank in the washing tower, so that the circulating liquid level of the water tank is accumulated with a large amount of sulfur mud, the liquid level of the water tank cannot be judged, a circulating pump is easily caused to empty or overflow of the water tank, an environmental protection event is caused, a large amount of sulfur mud is accumulated in the water tank, the electrode misjudgment of a dosing system is also caused, the consumption of sodium sulfide and sodium hydroxide chemicals is increased, or the dosing is not timely, the system treatment is abnormal, and yellow smoke or other influences are generated.

Disclosure of Invention

In order to solve or partially solve the above problems, the utility model discloses a cleaning and recycling device, which is used for solving the problem that suspension in a washing tower is accumulated easily to cause a ring-mounting event in the prior art.

The embodiment of the utility model discloses a cleaning and recycling device, which is used for cleaning and recycling suspended matters in a washing tower, and comprises the following components:

the sewage suction recovery component comprises a sewage suction port, a liquid outlet pipeline and a clean liquid extraction part, wherein the sewage suction port is arranged below the liquid level in the washing tower, one end of the liquid outlet pipeline is connected with the sewage suction port, the other end of the liquid outlet pipeline is connected with the clean liquid extraction part, suspended matters in the washing tower sucked by the sewage suction port flow into the clean liquid extraction part through the liquid outlet pipeline, and the clean liquid extraction part is used for filtering and extracting impurities in the suspended matters;

retrieve the conveying subassembly, retrieve conveying subassembly includes clean liquid collecting box, return liquid pipeline and communicating pipe, the one end of communicating pipe with clean liquid extraction spare is connected, the other end of communicating pipe with clean liquid collecting box is connected, return liquid pipeline's first end with clean liquid collecting box is connected, return liquid pipeline's second end is located under the liquid level in the scrubbing tower, wherein, liquid in the clean liquid extraction spare is via communicating pipe inflow collect in the clean liquid collecting box, liquid that collects in the clean liquid collecting box is via return liquid pipeline inflow in the scrubbing tower.

Optionally, a first diaphragm pump is arranged in the liquid outlet pipe, and the first diaphragm pump is used for pumping suspended matters in the washing tower into the clean liquid extraction part for filtering.

Optionally, a second diaphragm pump is arranged in the liquid return pipeline, and the second diaphragm pump is used for pumping the clean liquid collecting box body into the washing tower.

Optionally, the dirt absorbing port is a U-shaped horn mouth, and the size of the mouth of the dirt absorbing port, which is close to the liquid level in the washing tower, in the first direction is greater than the size of the bottom of the dirt absorbing port, which is far away from the liquid level in the washing tower, in the first direction, wherein the first direction is parallel to the liquid level in the washing tower.

Optionally, the distance between the mouth near the liquid level in the scrubber and the liquid level in the scrubber is 3 cm to 5 cm.

Optionally, the distance between the end of the second end of the liquid return conduit and the liquid level in the scrubber tower is greater than 100 mm.

Optionally, the liquid outlet pipeline comprises a first bent pipe and a liquid outlet pipe;

one end of the first elbow is connected with the sewage suction port, and the other end of the first elbow is connected with the liquid outlet pipe, wherein the first elbow is provided with at least one first bend, and the suspended matters have two intersecting flow directions in the first bend.

Optionally, the liquid outlet pipeline comprises a second bent pipe and a liquid return pipe;

the first end of the second elbow extends into the liquid level in the washing tower, and the second end of the second elbow is connected with a liquid return pipe, wherein the second elbow is provided with at least one second bend, and liquid flowing in the second bend is provided with two intersecting flowing directions.

Optionally, a distance between the first ends of the first elbow and the second elbow in a first direction is greater than 35 mm, wherein the first direction is a direction parallel to a liquid level in the washing tower.

Optionally, a liner soft joint is arranged at the outlet of the first diaphragm pump.

As can be seen from the above embodiments, in the embodiments of the present utility model, since the soil absorbing port is disposed below the liquid level in the washing tower, one end of the liquid outlet pipe is connected to the soil absorbing port, and the other end is connected to the cleaning liquid extracting member, the suspended matter in the washing tower sucked by the soil absorbing port flows into the cleaning liquid extracting member via the liquid outlet pipe, and the cleaning liquid extracting member is used for filtering and extracting the impurities in the suspended matter, so that the suspended matter in the washing tower can be sucked through the soil absorbing port and flows into the cleaning liquid extracting member via the liquid outlet pipe, so that the impurities in the suspended matter are filtered and extracted by the cleaning liquid extracting member. The recovery and conveying assembly comprises a clean liquid collecting box body, a liquid return pipeline and a communicating pipeline, one end of the communicating pipeline is connected with the clean liquid extracting part, the other end of the communicating pipeline is connected with the clean liquid collecting box body, the first end of the liquid return pipeline is connected with the clean liquid collecting box body, and the second end of the liquid return pipeline is positioned below the liquid level in the washing tower, so that liquid in the clean liquid extracting part flows into the clean liquid collecting box body through the communicating pipeline to be collected, the liquid collected in the clean liquid collecting box body flows into the washing tower through the liquid return pipeline, recycling of the liquid is realized, and the liquid level in the washing tower can be disturbed after the purified liquid flows into the washing tower again through the liquid return pipeline, in other words, after the purified liquid is introduced into the liquid return pipeline, the liquid in the washing tower flows, and a sewage suction port is convenient to suck suspended matters at the liquid level in the washing tower. In summary, through the cleaning and recycling device provided by the embodiment of the utility model, suspended matters of circulating liquid in the washing tower can be extracted, the blockage of filling materials and spray heads in the washing tower is avoided, the purified liquid can be repeatedly utilized, the water changing period of the washing tower is further prolonged, and the medicament waste is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, a brief description will be given below of the drawings required for the embodiments or the prior art descriptions, and it is obvious that the drawings in the following description are some embodiments of the present disclosure, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural view of a cleaning and recycling device according to an embodiment of the present utility model.

Reference numerals illustrate:

1-a soil pick-up recovery assembly; 2-a recovery transport assembly; 3-a washing tower; 11-a dirt suction port; 12-a liquid outlet pipeline; 13-a clean liquid extraction member; 21-a clean liquid collecting box body; 22-a liquid return pipeline; 23-communication pipes; 121-a first diaphragm pump; 122-a first elbow; 123-a liquid outlet pipe; 221-a second diaphragm pump; 222-a second elbow; 223-liquid return pipe.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present utility model. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

Fig. 1 is a schematic diagram of a cleaning and recycling apparatus according to an embodiment of the present utility model, for cleaning and recycling suspended matters in a scrubber 3, as shown in fig. 1, the cleaning and recycling apparatus includes: the dirt absorbing and recycling assembly 1, the dirt absorbing and recycling assembly 1 comprises a dirt absorbing port 11, a liquid outlet pipeline 12 and a clean liquid extracting piece 13, the dirt absorbing port 11 is arranged below the liquid level in the washing tower 3, one end of the liquid outlet pipeline 12 is connected with the dirt absorbing port 11, the other end of the liquid outlet pipeline 12 is connected with the clean liquid extracting piece 13, suspended matters in the washing tower 3 sucked by the dirt absorbing port 11 flow into the clean liquid extracting piece 13 through the liquid outlet pipeline 12, and the clean liquid extracting piece 13 is used for filtering and extracting impurities in the suspended matters.

The recovery conveying assembly 2, the recovery conveying assembly 2 includes clean liquid collecting box 21, return liquid pipeline 22 and communicating pipeline 23, one end of communicating pipeline 23 is connected with clean liquid extraction piece 13, the other end of communicating pipeline 23 is connected with clean liquid collecting box 21, the first end of return liquid pipeline 22 is connected with clean liquid collecting box 21, the second end of return liquid pipeline 22 is located under the liquid surface in scrubbing tower 3, wherein, liquid in clean liquid extraction piece 13 flows into clean liquid collecting box 21 to be collected via communicating pipeline 23, and liquid collected in clean liquid collecting box 21 flows into scrubbing tower 3 via return liquid pipeline 22.

In practical application, the scrubber 3 and the ground have a certain height, in other words, the scrubber 3 needs to be installed at the second floor of the purification plant, which is limited by the space of the same height as the scrubber 3 and the installation environment, and the purified liquid extracting member 13, the purified liquid collecting box 21 and the scrubber 3 need to be installed at the bottom of the scrubber 3, i.e. at the first floor of the purification plant.

In the embodiment of the utility model, the dirt sucking and recovering assembly 1 comprises a dirt sucking port 11 which needs to be arranged below the liquid level in the washing tower, so that suspended matters on the liquid level in the washing tower 3 are conveniently sucked through the dirt sucking port 11. In some embodiments, to facilitate the suction of suspended matter from the liquid level in the scrubber tower 3 through the suction port 11, the mouth of the suction port 11 should be directed towards the liquid level in the scrubber tower 3.

One end of the liquid outlet pipe 12 is connected with the dirt absorbing port 11, and the other end is connected with the clean liquid extraction member 13, wherein suspended matters in the washing tower 3 sucked by the dirt absorbing port 11 flow into the clean liquid extraction member 13 through the liquid outlet pipe 12, namely, the liquid outlet pipe 12 introduces suspended matters in the washing tower 3 from the second floor of the purification workshop into the clean liquid extraction member 13 positioned at the first floor. The liquid-purifying extraction member 13 is a kind of press, and is mainly used for filtering and extracting salts such as nitrate and sulfate and elemental sulfur in the suspended matter so as to purify the suspended matter flowing out of the liquid-purifying extraction member 13.

The purified suspension from the clean liquid extraction member 13 is re-fed into the washing tower 3 through the recovery and conveying assembly 2 to complete a cycle. Specifically, the recovery transport assembly 2 includes a clean liquid collecting tank 21, a liquid return pipe 22, and a communicating pipe 23. Wherein the cleaning liquid collecting tank 21 is used for collecting the cleaned suspension liquid flowing out from the cleaning liquid extraction member 13. Because the clean liquid extracting member 13 is a kind of press, the principle of "up-in-down-out" pipe arrangement needs to be satisfied, that is, the end of the liquid outlet pipe 12 is connected to the top of the clean liquid extracting member 13, one end of the communicating pipe 23 is connected to the bottom of the clean liquid extracting member 13, and the other end of the communicating pipe 23 is connected to the collecting box. In this way, the purified liquid in the purified liquid extraction member 13 can be sent to the purified liquid collection tank 21 through the communication pipe 23 for collection. The first end of the liquid return pipeline 22 is connected with the clean liquid collecting box body 21, and the second end of the liquid return pipeline 22 is positioned below the liquid level in the washing tower 3, so that the purified liquid can flow into the washing tower 3 again through the liquid return pipeline 22, and the reutilization of the liquid is realized. And because the second end of the liquid return pipeline 22 is positioned below the liquid level in the washing tower 3, after the purified liquid flows into the washing tower 3 again through the liquid return pipeline 22, the liquid level in the washing tower 3 can be disturbed, in other words, after the purified liquid is introduced through the liquid return pipeline 22, the liquid in the washing tower 3 can flow, and the sewage suction port 11 is convenient for sucking suspended matters on the liquid level of the water tank.

As can be seen from the above embodiments, in the embodiment of the present utility model, since the soil pick-up port 11 is provided below the liquid level in the washing column 3, one end of the liquid outlet pipe 12 is connected to the soil pick-up port 11, and the other end is connected to the clean liquid extraction member 13, the suspended matter in the washing column 3 sucked up by the soil pick-up port 11 flows into the clean liquid extraction member 13 via the liquid outlet pipe 12, and the clean liquid extraction member 13 serves to filter and extract the impurities in the suspended matter, so that the suspended matter in the washing column 3 can be sucked up through the soil pick-up port 11 and flows into the clean liquid extraction member 13 via the liquid outlet pipe 12, so that the impurities in the suspended matter are filtered and extracted by the clean liquid extraction member 13. The recovery and conveying assembly 2 comprises a clean liquid collecting box 21, a liquid return pipeline 22 and a communicating pipeline 23, one end of the communicating pipeline 23 is connected with the clean liquid extracting member 13, the other end of the communicating pipeline 23 is connected with the clean liquid collecting box 21, the first end of the liquid return pipeline 22 is connected with the clean liquid collecting box 21, and the second end of the liquid return pipeline 22 is positioned below the liquid level in the washing tower 3, so that liquid in the clean liquid extracting member 13 flows into the clean liquid collecting box 21 through the communicating pipeline 23 to be collected, the liquid collected in the clean liquid collecting box 21 flows into the washing tower 3 through the liquid return pipeline 22, the reutilization of the liquid is realized, and the second end of the liquid return pipeline 22 is positioned below the liquid level in the washing tower 3, so that after the purified liquid flows into the washing tower 3 again through the liquid return pipeline 22, in other words, the liquid in the washing tower 3 can flow, and the sewage suction port 11 is convenient to suck suspended matters at the liquid level in the washing tower 3. In summary, through the cleaning and recycling device provided by the embodiment of the utility model, suspended matters of circulating liquid in the washing tower 3 can be extracted, the blockage of the filling material and the spray head in the washing tower 3 is avoided, the purified liquid can be repeatedly utilized, the water changing period of the washing tower 3 is further prolonged, and the medicament waste is reduced.

In some embodiments, a first membrane pump 121 is arranged in the liquid outlet pipe 12, the first membrane pump 121 being used for pumping the suspended matter in the scrubber 3 into the clean liquid extractor 13 for filtering.

The first membrane pump 121 is located at a second floor of the purification plant, the first membrane pump 121 may be one of a pneumatic membrane pump, an electric membrane pump, and the like, and the first membrane pump 121 is a pump member that changes the volume of the working chamber by means of back and forth movement of one membrane sheet, thereby sucking and discharging liquid. That is, by providing the first diaphragm pump 121 in the liquid outlet pipe 12, not only the suspended solids in the washing column 3 but also the suspended solids in the washing column 3 can be discharged to the clean liquid extraction member 13, and the suspended solids in the washing column 3 can be transported to the outside. Taking a pneumatic diaphragm pump as an example, the pneumatic diaphragm pump separates an infusion body from a movable column and a pump cylinder by a film, so that the movable column and the pump cylinder are protected, the part of the left side of the diaphragm, which is contacted with liquid, is made of corrosion-resistant materials or coated with a layer of corrosion-resistant materials, and when the diaphragm pump works, a crank-link mechanism drives a plunger to reciprocate under the driving of a motor, and the movement of the plunger is transmitted to the diaphragm through working liquid (generally oil) in a liquid cylinder, so that the diaphragm is driven back and forth.

Optionally, a liner soft joint is provided at the outlet of the first diaphragm pump 121.

The lining may be made of a metal material, such as copper, aluminum, or other metal materials that are not easy to corrode, and the soft joint may be made of a polymer material that has a small friction system and is corrosion-resistant, such as polytetrafluoroethylene, or the like. In this way, by providing a liner soft connection at the outlet of the first diaphragm pump 121, leakage due to vibration and abrasion of the pipeline is avoided, and further, an annular event is avoided.

In some embodiments, a second membrane pump 221 is provided in the liquid return conduit 22, the second membrane pump 221 being used to pump the clean liquid collection tank 21 into the scrubber 3.

The second diaphragm pump 221 may be one of a pneumatic diaphragm pump, an electric diaphragm pump, and the like, that is, a pump that sucks and discharges a liquid by changing the volume of a working chamber by the back and forth movement of one diaphragm. In this way, when the second diaphragm pump 221 is provided in the liquid return pipe 22, the liquid collected in the purified liquid collection tank 21 can be sucked by the second diaphragm pump 221, and the sucked liquid can be pumped into the washing tower 3, thereby realizing the recycling of the liquid.

With respect to the configuration of the suction port 11, in some embodiments, the suction port 11 is a U-shaped horn, and the size of the mouth of the suction port 11 near the liquid level in the scrubber 3 in a first direction is greater than the size of the bottom of the suction port 11 away from the liquid level in the scrubber 3 in the first direction, wherein the first direction is a direction parallel to the liquid level in the scrubber 3.

It should be noted that, because the dirt absorbing port 11 is a U-shaped horn mouth, the size of the mouth of the dirt absorbing port 11, which is close to the liquid level in the washing tower 3, in the first direction is larger than the size of the bottom of the dirt absorbing port 11, which is far away from the liquid level in the washing tower 3, in the first direction, so that the mouth of the dirt absorbing port 11, which faces the liquid level in the washing tower 3, can be ensured to have a wider washing liquid surface, and further, suspended matters in the washing tower 3 can be conveniently absorbed through the dirt absorbing port 11.

Alternatively, the distance between the mouth close to the liquid level in the scrubber 3 and the liquid level in the scrubber 3 is 3 cm to 5 cm.

It should be noted that, the distance between the opening near the liquid surface in the washing tower 3 and the liquid surface in the washing tower 3 may be any one of 3 cm, 4 cm, 5 cm, 3 cm to 4 cm, or any one of 4 cm to 5 cm, which is not limited in the embodiment of the present utility model. Thus, the suspended matters on the liquid level in the washing tower 3 can be conveniently sucked, and the dirt sucking effect of the dirt sucking port 11 is ensured.

Optionally, the distance between the end of the second end of the return conduit 22 and the liquid level in the scrubber 3 is greater than 100 mm. In this way, the liquid flowing into the washing tower 3 from the second end of the liquid return pipe 22 can disturb the liquid in the washing tower 3, so that the dirt suction port 11 can suck suspended matters on the liquid surface in the washing tower 3.

For the outlet conduit 12, in some embodiments, the outlet conduit 12 includes a first elbow 122 and an outlet pipe 123; one end of the first elbow 122 is connected to the dirt suction opening 11, and the other end of the first elbow 122 is connected to the liquid outlet pipe 123, wherein the first elbow 122 has at least one first bend in which the suspended matter has two intersecting flow directions. In this way, after the dirt suction port 11 is used for sucking the suspended matters, when the suspended matters flow in the first elbow pipe 122, as the first elbow pipe 122 is provided with at least one first elbow pipe, the suspended matters have two intersecting flow directions in the first elbow pipe, so that the resistance of the suspended matters in the first elbow pipe 122 can be reduced, and the fluency of the liquid outlet is ensured.

Further, the liquid outlet pipe 12 comprises a second elbow 222 and a liquid return pipe 223; the first end of the second elbow 222 extends into the liquid surface in the washing tower 3, and the second end of the second elbow 222 is connected with a liquid return pipe 223, wherein the second elbow 222 is provided with at least one second bend, and liquid flowing in the second bend is provided with two intersecting flowing directions. Thus, since the second elbow 222 has at least one second bend, the liquid flowing in the second bend has two intersecting flow directions, so that the liquid flowing out from the clean liquid collecting tank 21 can reduce the return resistance and maintain the liquid return amount under the action of the second elbow 222 when flowing back into the washing tower 3 through the liquid outlet pipe 12, thereby ensuring that the liquid level of the washing tower 3 is maintained between 100 mm and 150mm above the communication port of the washing tower 3.

Optionally, the first end of the first elbow 122 and the second elbow 222 are spaced more than 35 mm apart in a first direction, wherein the first direction is parallel to the liquid level in the scrubber 3 (3).

It should be noted that, since the first end of the first bent pipe 122 and the first end of the second bent pipe 222 have a distance of greater than 35 mm in the first direction, the processes of sucking liquid and draining liquid can be prevented from interfering with each other.

In the description, each embodiment is described in a progressive manner, and each embodiment is mainly described by the differences from other embodiments, so that identical and similar parts between the embodiments are all mutually referred.

While preferred embodiments of the present utility model have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the scope of the embodiments of the utility model.

Finally, it is further noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article or terminal device comprising the element.

The foregoing has outlined a detailed description of a separation and transportation device according to the present utility model, wherein specific examples are provided herein to illustrate the principles and embodiments of the present utility model, the above examples being provided only to assist in understanding the method and core concepts of the present utility model; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present utility model, the present description should not be construed as limiting the present utility model in view of the above.

Claims

1. A cleaning recovery device for cleaning recovery of suspended matter in a scrubber (3), characterized in that the cleaning recovery device comprises:

the sewage suction recovery assembly (1), the sewage suction recovery assembly (1) comprises a sewage suction port (11), a liquid outlet pipeline (12) and a clean liquid extraction piece (13), the sewage suction port (11) is arranged below the liquid level in the washing tower (3), one end of the liquid outlet pipeline (12) is connected with the sewage suction port (11), the other end of the liquid outlet pipeline (12) is connected with the clean liquid extraction piece (13), suspended matters in the washing tower (3) sucked by the sewage suction port (11) flow into the clean liquid extraction piece (13) through the liquid outlet pipeline (12), and the clean liquid extraction piece is used for filtering and extracting impurities in the suspended matters;

retrieve conveying component (2), retrieve conveying component (2) including net liquid collection box (21), return liquid pipeline (22) and communicating pipe (23), communicating pipe's (23) one end with net liquid draws piece (13) and connect, communicating pipe's (23) the other end with net liquid collection box (21) are connected, return liquid pipeline (22) first end with net liquid collection box (21) are connected, return liquid pipeline (22) second end is located liquid level in washing tower (3), wherein, liquid in net liquid draws piece (13) is via communicating pipe (23) inflow net liquid collection box (21) is interior to be collected, liquid that collects in net liquid collection box (21) is via return liquid pipeline (22) inflow in washing tower (3).

2. A cleaning and recovery device according to claim 1, characterized in that a first membrane pump (121) is arranged in the liquid outlet pipe (12), the first membrane pump (121) being used for pumping the suspended matter in the washing tower (3) into the clean liquid extraction member (13) for filtering.

3. A cleaning and recovery device according to claim 1, characterized in that a second membrane pump (221) is arranged in the liquid return pipe (22), the second membrane pump (221) being used for pumping the clean liquid collecting tank (21) into the washing tower (3).

4. The cleaning and recovery device according to claim 1, characterized in that the dirt suction opening (11) is a U-shaped horn opening, the dimension of the mouth of the dirt suction opening (11) close to the liquid level in the washing tower (3) in a first direction being larger than the dimension of the dirt suction opening (11) away from the bottom of the liquid level in the washing tower (3) in the first direction, wherein the first direction is a direction parallel to the liquid level in the washing tower (3).

5. The cleaning and recovery device according to claim 4, characterized in that the distance between the mouth near the liquid level in the washing tower (3) and the liquid level in the washing tower (3) is 3 cm to 5 cm.

6. A cleaning recovery device according to claim 1, characterized in that the distance between the end of the second end of the return conduit (22) and the liquid level in the scrubber tower (3) is more than 100 mm.

7. The cleaning and recovery device according to claim 1, characterized in that the liquid outlet pipe (12) comprises a first elbow (122) and a liquid outlet pipe (123);

one end of the first elbow pipe (122) is connected with the sewage suction port (11), and the other end of the first elbow pipe (122) is connected with the liquid outlet pipe (123), wherein the first elbow pipe (122) is provided with at least one first bend, and the suspended matters have two intersecting flow directions in the first bend.

8. The cleaning and recovery device according to claim 7, characterized in that the liquid outlet pipe (12) comprises a second elbow (222) and a liquid return pipe (223);

the first end of the second elbow pipe (222) stretches into the liquid level in the washing tower (3), the second end of the second elbow pipe (222) is connected with a liquid return pipe (223), wherein the second elbow pipe (222) is provided with at least one second bend, and liquid flowing in the second bend is provided with two intersecting flow directions.

9. The cleaning and recovery device according to claim 8, characterized in that the distance between the first ends of the first and second elbows (122, 222) in a first direction, which is parallel to the liquid level in the scrubber tower (3), is greater than 35 mm.

10. A cleaning recovery apparatus according to claim 2, characterized in that the outlet of the first membrane pump (121) is provided with a liner hose.