A plant wastewater concentration device

Abstract

The application discloses a workshop wastewater concentration device and relates to the technical field of wastewater treatment. The device comprises a cylinder, an upper cover, a mounting plate, a plurality of first filter screens, and a water outlet pipe. The first filter screens are evenly distributed on the mounting plate. The water outlet pipe is arranged on the upper cover. A plurality of nozzles are connected with the water outlet pipe, and each nozzle is located above a first filter screen to make the nozzle vertically face the upper surface of the first filter screen. The device is inflated by a gas pump to make the first elastic bag swell, further extrude and concentrate the concentrated wastewater in the cylinder, improve the concentration effect of the concentrated liquid, and close the gas pump. The air in the first elastic bag flows back to extrude and spray the liquid in the water outlet pipe, and backwash the first filter screen. Thus, the first filter screen in the device can be backwashed and cleaned without frequent disassembly of the device, the use of the device is facilitated, and the filtering efficiency of the device is improved.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and in particular to a workshop wastewater concentration device. Background Technology

[0002] Building materials production involves various processes, such as concrete, ceramics, and glass processing. The wastewater generated by these different processes may have different compositions, but they typically contain pollutants such as suspended solids. This wastewater needs to be concentrated to meet environmental emission standards, and the filtered wastewater can be recycled to reduce water consumption.

[0003] Existing wastewater concentration devices typically use filters to intercept suspended solids in wastewater, thereby concentrating the wastewater. However, over time, these suspended solids can clog the filter pores, reducing filtration efficiency and necessitating regular cleaning. Unfortunately, existing wastewater concentration devices usually have the filters internally mounted, making them difficult to disassemble and clean. Cleaning the filters requires shutdown and removal, significantly reducing the overall efficiency of wastewater concentration. Summary of the Invention

[0004] The purpose of this invention is to solve the problems in the prior art by proposing a wastewater concentration device for workshop wastewater treatment that can conveniently and quickly clean the filter screen online.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A workshop wastewater concentration device, comprising: Cylinder body and top cover; The mounting plate is located between the cylinder and the top cover; Multiple first filters are evenly distributed on the mounting plate; The water outlet pipe is located on the top cover; Multiple nozzles, each nozzle is connected to a water outlet pipe, and each nozzle is located above a first filter screen so that the nozzle is perpendicular to the upper surface of the first filter screen; The first elastic bladder is located below the mounting plate; A fixing block is mounted on a mounting plate and has an internal cavity. The top of the cavity has an air inlet and an air outlet. The first elastic bladder communicates with the cavity of the fixing block. The slider is slidably connected to the cavity of the fixed block; An air pump, with an air inlet pipe between itself and the fixed block, pumps air into the interior of the first elastic bladder through the air inlet pipe and pushes the slider to slide to the bottom of the air outlet. And an elastic element, which is disposed on one side of the slider to push the slider to the bottom of the air inlet, so that the air inside the first elastic bladder enters the water outlet pipe through the air outlet and squeezes the liquid inside the water outlet pipe, so that the liquid is sprayed onto the first filter screen through the nozzle.

[0006] Furthermore, a guide rod is provided inside the cavity of the fixed block, and the elastic element and the slider are both sleeved on the outside of the guide rod so that the slider can move along the guide rod. The elastic element is a spring.

[0007] Furthermore, one side of the slider is set as an inclined surface, and the air inlet can fit against the inclined surface of the slider so that the slider blocks the bottom of the air inlet.

[0008] Furthermore, both the first filter and the nozzle are arc-shaped, and multiple spray holes are evenly distributed at the bottom of the nozzle, with each spray hole facing vertically toward the upper surface of the first filter.

[0009] Furthermore, a second filter is provided at the bottom of the nozzle.

[0010] Furthermore, a connecting pipe is provided between the nozzle and the water outlet pipe, and one end of the connecting pipe is connected to the bottom of the water outlet pipe.

[0011] Furthermore, an air vent is provided inside the water outlet pipe. The upper end of the air vent is located at the top of the inside of the water outlet pipe, and the lower end of the air vent is connected to the air outlet hole.

[0012] Furthermore, the top of the cylinder and the bottom of the top cover are both provided with fixing rings, and the two fixing rings are provided with corresponding fixing holes to fix the two fixing rings together by bolts.

[0013] Furthermore, positioning grooves are provided on the contact surfaces of the two fixing rings that are close to each other. The positioning grooves are adapted to the mounting plate so that the mounting plate can be embedded inside the positioning grooves. Sealing rings are provided on the top and bottom of the mounting plate.

[0014] Furthermore, a water inlet pipe is provided on one side of the cylinder, with an inlet valve and a check valve on the water inlet pipe. A drain pipe is provided at the bottom of the cylinder, with a drain valve on the drain pipe. A water pump is provided at one end of the water outlet pipe, with an outlet valve on the water pump.

[0015] The beneficial effects of this invention are as follows: In this invention, wastewater in the workshop wastewater concentration device is filtered through a first filter screen. The filtered wastewater is then pumped and collected by a water pump. The concentrated wastewater (or concentrate) is stored below the first filter screen. When the suspended solids content of the concentrate inside the cylinder is high, air is pumped into the first elastic bladder to expand it and compress the internal space of the cylinder, further compressing the concentrated wastewater inside the cylinder so that it passes through the first filter screen. This facilitates further concentration of the concentrated wastewater and improves the concentration effect of the concentrate. After the wastewater concentrate is further concentrated, the air pump is turned off, and the elastic element pushes the slider to reset, thereby opening the air outlet. At this time, under the elastic force of the first elastic bladder and the water pressure of the concentrate around the elastic bladder, the first elastic bladder is squeezed and compressed, causing the air inside the first elastic bladder to flow back into the air outlet pipe, thereby squeezing out the liquid inside the water pipe and spraying the liquid out through the nozzle. The liquid water column is sprayed vertically onto the surface of the first filter screen, thereby backwashing the first filter screen. In this way, the first filter screen inside the device can be backwashed and cleaned online without stopping the device for disassembly, which facilitates the use of the device and improves the filtration efficiency of the device. As the wastewater concentrate is further concentrated, air is pumped into the second elastic bladder, which expands and pushes the rack connected to it to move. The rack drives the gear to rotate, which in turn drives the scraper to move through the rotating rod, scraping off the suspended solids intercepted on the lower surface of the first filter screen. This allows the concentrate to pass through the second filter screen for further concentration. Attached Figure Description

[0016] Figure 1 This is a three-dimensional main view structural diagram of a workshop wastewater concentration device proposed in this invention; Figure 2 This is a three-dimensional structural diagram of the outlet pipe, nozzle, and first filter screen in a workshop wastewater concentration device proposed in this invention. Figure 3 This is a cross-sectional view of the first filter screen, scraper, gear, and rack in a workshop wastewater concentration device proposed in this invention. Figure 4 This is a cross-sectional view of the fixing block when the first elastic bladder in the workshop wastewater concentration device proposed in this invention is inflated. Figure 5 This is a cross-sectional view of the fixing block during the venting of the first elastic bladder in a workshop wastewater concentration device proposed in this invention. Figure 6 This is a cross-sectional structural schematic diagram of a workshop wastewater concentration device proposed in this invention; Figure 7 This is a cross-sectional structural diagram of the nozzle in a workshop wastewater concentration device proposed in this invention.

[0017] In the diagram: 1. Cylinder, 2. Inlet pipe, 201. Inlet valve, 202. Check valve, 3. Outlet pipe, 301. Air pump, 302. Pumping pipe, 303. Outlet valve, 304. Air inlet pipe, 305. Air outlet pipe, 4. Top cover, 5. First filter screen, 6. Mounting plate, 601. Sealing ring, 7. Fixing ring, 701. Positioning groove, 702. Fixing hole, 8. First elastic bladder, 801. Vent pipe, 9. Drain pipe, 901. Drain valve, 10. Nozzle, 1001. Connecting pipe, 1002. Spray hole, 1003. Second filter screen, 11. Second elastic bladder, 1201. Scraper, 1202. Rotating rod, 1203. Fixing cylinder, 1204. Gear, 1205. Rack, 13. Fixing block, 1301. Air inlet, 1302. Air outlet, 1303. Slider, 1304. Elastic element, 1305. Guide rod. Detailed Implementation

[0018] The technical solution of this patent will be further described in detail below with reference to specific embodiments.

[0019] The embodiments of this patent are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this patent, and should not be construed as limiting this patent.

[0020] In the description of this patent, it should be understood that the terms “center,” “upper,” “lower,” “front,” “back,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this patent and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this patent.

[0021] In the description of this patent, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this patent according to the specific circumstances.

[0022] Example 1 Reference Figure 1-7 A workshop wastewater concentration device is used in the wastewater concentration treatment process of building materials. It is designed to facilitate online rapid rinsing of the filter screen and improve wastewater filtration efficiency.

[0023] The wastewater concentration device for the workshop includes a cylinder 1, a top cover 4, a mounting plate 6, multiple first filter screens 5, a water outlet pipe 3, multiple nozzles 10, a first elastic bladder 8, an air pump 301, and a connecting mechanism. The top of the cylinder 1 and the bottom of the top cover 4 are both provided with fixing rings 7. The two fixing rings 7 are provided with corresponding fixing holes 702 so that the two fixing rings 7 can be fixedly connected by bolts. The mounting plate 6 is set between the cylinder 1 and the top cover 4. After the cylinder 1 and the top cover 4 are fixedly connected by bolts, the mounting plate 6 will be clamped and fixed by the cylinder 1 and the top cover 4. After the cylinder 1 and the top cover 4 are disassembled, the mounting plate 6 can be easily removed.

[0024] Furthermore, positioning grooves 701 are provided on the contact surfaces of the two fixing rings 7 that are close to each other. The positioning grooves 701 are adapted to the mounting plate 6. When the mounting plate 6 is clamped and fixed by the cylinder 1 and the top cover 4, the mounting plate 6 can be embedded in the positioning grooves 701, which facilitates the fixed installation of the mounting plate 6. In addition, sealing rings 601 are provided at the top and bottom of the mounting plate 6, which can improve the sealing between the mounting plate 6 and the cylinder 1 and the top cover 4 and prevent water leakage.

[0025] A water inlet pipe 2 is provided on one side of the cylinder 1. The water inlet pipe 2 is equipped with a water inlet valve 201 and a one-way valve 202. The wastewater to be treated can enter the interior of the cylinder 1 through the water inlet pipe 2. The one-way valve 202 can prevent the wastewater from flowing back. Each first filter screen 5 is evenly distributed on the mounting plate 6. The wastewater entering the interior of the cylinder 1 is filtered from bottom to top through each first filter screen 5. The filtered wastewater comes to the top of the first filter screen 5, while the concentrated wastewater stays below the first filter screen 5.

[0026] The water outlet pipe 3 is installed on the upper cover 4. Each nozzle 10 is connected to the water outlet pipe 3 through a connecting pipe 1001. The water outlet pipe 3 is equipped with a water suction pipe 302, and the water suction pipe 302 is equipped with a water outlet valve 303. One end of the water suction pipe 302 is equipped with a water pump. The wastewater filtered by the first filter screen 5 can be drawn out through the water pump and the water suction pipe 302. The filtered wastewater is sucked in through the nozzle 10, enters the water outlet pipe 3 through the connecting pipe 1001, and is finally drawn out and collected by the water suction pipe 302.

[0027] The connecting mechanism includes a fixed block 13, a slider 1303, and an elastic element 1304. The fixed block 13 is mounted on the mounting plate 6 and has an internal cavity. The top of the cavity has an air inlet 1301 and an air outlet 1302. An air inlet pipe 304 is provided between the air pump 301 and the fixed block 13. The first elastic bladder 8 is located below the mounting plate 6 and is connected to the cavity of the fixed block 13. The air pump 301 pumps air into the cavity of the fixed block 13 through the air inlet pipe 304 and the air inlet 1301. Subsequently, the air enters the interior of the first elastic bladder 8, causing the interior of the first elastic bladder 8 to inflate and expand, thereby compressing the internal space of the cylinder 1 and further compressing the concentrated wastewater inside the cylinder 1, so that it passes through the first filter screen 5 for further concentration treatment of the concentrated wastewater.

[0028] Furthermore, a guide rod 1305 is provided inside the cavity of the fixed block 13. The elastic element 1304 and the slider 1303 are both sleeved on the outside of the guide rod 1305 so that the slider 1303 can move along the guide rod 1305. One side of the slider 1303 is set as an inclined surface. The air inlet 1301 can fit with the inclined surface of the slider 1303 so that the slider 1303 blocks the bottom of the air inlet 1301. When the air pump 301 pumps gas into the cavity inside the fixed block 13, the airflow is ejected through the air inlet 1301 and sprayed onto the inclined surface of one side of the slider 1303, thereby generating a thrust on the slider 1303 and pushing the slider 1303 to the bottom of the air outlet 1302, blocking the air outlet 1302.

[0029] The elastic element 1304 is a spring, which is located on one side of the slider 1303. When the slider 1303 is pushed to the bottom of the air outlet 1302 by the air inlet 1301, the elastic element 1304 is compressed. When the air pump 301 stops working, the elastic element 1304 is released, thereby pushing the slider 1303 to slide to the bottom of the air inlet 1301, blocking the air inlet 1301 and opening the air outlet 1302, so that the air inside the first elastic bladder 8 flows back and enters the water outlet pipe 3 through the air outlet 1302, thereby squeezing the liquid inside the water outlet pipe 3, so that the liquid is sprayed onto the first filter screen 5 through the nozzle 10, and the first filter screen 5 is backwashed and cleaned.

[0030] Furthermore, each nozzle 10 is located above a first filter screen 5, so that the nozzle 10 is perpendicular to the upper surface of the first filter screen 5. Multiple spray holes 1002 are evenly distributed on the bottom of the nozzle 10, and each spray hole 1002 is perpendicular to the upper surface of the first filter screen 5. This allows the water flow to be sprayed perpendicularly onto the upper surface of the first filter screen 5 when the liquid inside the nozzle 10 is sprayed out through each spray hole 1002, thereby improving the rinsing and cleaning effect. In addition, both the first filter screen 5 and the nozzle 10 are arc-shaped. The arc-shaped first filter screen 5 can increase the area of ​​the first filter screen 5, thereby improving the filtration efficiency.

[0031] Furthermore, a second filter 1003 is provided at the bottom of the nozzle 10, which can perform secondary filtration on the liquid entering the nozzle 10, thereby improving the filtration effect.

[0032] Furthermore, the water outlet pipe 3 is provided with an air outlet pipe 305 inside. The upper end of the air outlet pipe 305 is located at the top of the inside of the water outlet pipe 3, and the lower end of the air outlet pipe 305 is connected to the air outlet hole 1302. When the air inside the first elastic bladder 8 flows back, it will enter the inside of the water outlet pipe 3 through the air outlet pipe 305. The air gathers at the top of the inside of the water outlet pipe 3, thereby squeezing the liquid inside the water outlet pipe 3 into the nozzle 10. Since one end of the connecting pipe 1001 is connected to the bottom of the water outlet pipe 3, it is convenient for the air to squeeze all the liquid inside the water outlet pipe 3 into the nozzle 10.

[0033] The bottom of the cylinder 1 is equipped with a drain pipe 9, and a drain valve 901 is provided on the drain pipe 9. The concentrated wastewater can be discharged and collected through the drain pipe 9.

[0034] Furthermore, solenoid valves can be used for the valves on each pipeline for easy control.

[0035] Example 2 Reference Figure 3 A workshop wastewater concentration device, in order to further improve the cleaning effect of the first filter screen 5 and facilitate the concentration treatment of wastewater, the workshop wastewater concentration device also includes multiple cleaning components. Each cleaning component is set at the bottom of a first filter screen 5. Each cleaning component includes a second elastic bladder 11, a scraper 1201, a rotating rod 1202, a fixed cylinder 1203, a gear 1204 and a rack 1205.

[0036] The first elastic bladder 8 is connected to the fixed block 13 via a vent pipe 801. A second elastic bladder 11 is mounted on the vent pipe 801. One end of the rack 1205 is connected to the second elastic bladder 11. A fixed cylinder 1203 is fixedly connected to the lower part of the mounting plate 6. A gear 1204 is rotatably connected to the inside of the fixed cylinder 1203. A rotating rod 1202 is fixedly connected to the gear 1204. A scraper rod 1201 is fixedly connected to the upper end of the rotating rod 1202, and the scraper rod 1201 is connected to the second filter screen 1003. The lower surface is fitted together, and the side wall of the fixed cylinder 1203 is provided with a through hole. The rack 1205 is slidably connected to the inside of the through hole, and the rack 1205 meshes with the gear 1204. When the first elastic bladder 8 is inflated, the second elastic bladder 11 will also be inflated and expanded, thereby pushing the rack 1205 to translate and driving the gear 1204 to rotate. The gear 1204 drives the scraper 1201 to move through the rotating rod 1202, thereby scraping off the suspended matter intercepted on the lower surface of the second filter screen 1003 and improving the wastewater concentration efficiency.

[0037] The working principle of the wastewater concentration device in this workshop is as follows: When the inlet valve 201 is opened, the wastewater to be treated enters the interior of the cylinder 1 through the inlet pipe 2. The wastewater entering the cylinder 1 is filtered from bottom to top through each of the first filter screens 5. The filtered wastewater comes to the top of the first filter screens 5, where the water pump draws the filtered wastewater from the first filter screens 5. The filtered wastewater is sucked in through the nozzle 10, enters the outlet pipe 3 through the connecting pipe 1001, and is finally drawn out and collected by the pumping pipe 302. When the filtered wastewater enters the nozzle 10, it will pass through the second filter screen 1003 for secondary filtration, thereby improving the filtration effect of the device on the wastewater. After filtration, the wastewater is extracted and collected, while the concentrated wastewater remains below the first filter screen 5. When the concentration of suspended solids in the concentrate inside the cylinder 1 is high after the wastewater has been filtered for a period of time, the outlet valve 303 is closed, and the air pump 301 pumps air into the cavity of the fixed block 13 through the air inlet pipe 304. The air enters the cavity of the fixed block 13 through the air inlet 1301, and when the air is injected into the cavity, it pushes the inclined surface on one side of the slider 1303, thereby causing the slider 1303 to move to the bottom of the air outlet 1302 along the guide rod 1305, blocking the air outlet 1302. Then, the air enters the interior of the first elastic bladder 8, causing the interior of the first elastic bladder 8 to inflate and expand, thereby squeezing the internal space of the cylinder 1 and further squeezing the concentrated wastewater inside the cylinder 1, so that it passes through the first filter screen 5, facilitating further concentration treatment of the concentrated wastewater. After the wastewater concentrate is further concentrated, the air pump 301 is turned off, and the elastic element 1304 is released, thereby pushing the slider 1303 to slide to the bottom of the air inlet 1301, blocking the air inlet 1301, and opening the air outlet 1302. At this time, under the elastic force of the first elastic bladder 8 and the water pressure of the concentrate around the elastic bladder, the first elastic bladder 8 is compressed and reduced, causing the air inside the first elastic bladder 8 to flow back, causing the air inside to be squeezed upward into the cavity of the fixed block 13, and enter the air outlet pipe 305 through the air outlet 1302. Since the upper end of the air outlet pipe 305 is located inside the water outlet pipe 3, this allows... Air enters the water outlet pipe 3, inflating the inside of the water outlet pipe 3 and squeezing the liquid inside the water outlet pipe 3. The liquid inside is then squeezed back into the nozzle 10 through the connecting pipe 1001 and sprayed out through the spray hole 1002. The liquid water column is sprayed vertically onto the upper surface of the first filter screen 5, thereby backwashing the first filter screen 5 and flushing the suspended matter clogging the first filter screen 5 into the lower part of the cylinder 1. At this time, the drain valve 901 is opened, and the suspended matter is discharged with the concentrate. In this way, the first filter screen 5 inside the device can be backwashed and cleaned without frequent disassembly of the device, which facilitates the use of the device and improves the filtration efficiency of the device. When the first elastic bladder 8 is inflated, air is also pumped into the second elastic bladder 11. At this time, the second elastic bladder 11 will also expand, thereby pushing the rack 1205 connected to it to translate. The rack 1205 will drive the gear 1204 to rotate, thereby driving the scraper 1201 to move through the rotating rod 1202, scraping off the suspended matter intercepted on the lower surface of the first filter screen 5, so as to facilitate further concentration of the concentrate.

[0038] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A workshop wastewater concentration device, characterized in that, include: Cylinder (1) and top cover (4); First filter screen (5), each of the first filter screens (5) is disposed between the cylinder (1) and the upper cover (4); Water outlet pipe (3), the water outlet pipe (3) is provided with a nozzle (10), the nozzle (10) is located above the first filter screen (5); The first elastic bladder (8) is disposed below the first filter (5); An air pump (301) is used to pump air into the interior of the first elastic bladder (8) to increase the volume of the first elastic bladder (8) and squeeze the liquid inside the cylinder (1) so that the liquid passes through the first filter screen (5) for filtration. And a connecting mechanism, so that the air inside the first elastic bladder (8) enters the water outlet pipe (3), and the liquid inside the water outlet pipe (3) is squeezed and sprayed onto the first filter screen (5) through the nozzle (10).

2. The workshop wastewater concentration device according to claim 1, characterized in that: It also includes an installation plate (6), which is disposed between the cylinder (1) and the upper cover (4), and the water outlet pipe (3) is disposed on the upper cover (4); Multiple first filter screens (5) and spray nozzles (10) are provided. Each first filter screen (5) is evenly distributed on the mounting plate (6). Each spray nozzle (10) is connected to the water outlet pipe (3). Each spray nozzle (10) is located above a first filter screen (5) so that the spray nozzle (10) is perpendicular to the upper surface of the first filter screen (5). The first elastic bladder (8) is disposed below the mounting plate (6).

3. The workshop wastewater concentration device according to claim 2, characterized in that: The connecting mechanism includes a fixed block (13), a slider (1303), and an elastic element (1304). The fixed block (13) is disposed on the mounting plate (6) and has a cavity inside. The top of the cavity has an air inlet (1301) and an air outlet (1302). The first elastic bladder (8) communicates with the cavity of the fixed block (13). The slider (1303) is slidably connected to the cavity of the fixed block (13); An air inlet pipe (304) is provided between the air pump (301) and the fixed block (13) to pump air into the interior of the first elastic bladder (8) through the air inlet pipe (304) and push the slider (1303) to slide to the bottom of the air outlet (1302); The elastic element (1304) is disposed on one side of the slider (1303) to push the slider (1303) to slide to the bottom of the air inlet (1301), so that the air inside the first elastic bladder (8) enters the water outlet pipe (3) through the air outlet (1302) and squeezes the liquid inside the water outlet pipe (3), so that the liquid is sprayed onto the first filter screen (5) through the nozzle (10).

4. The workshop wastewater concentration device according to claim 3, characterized in that: The cavity of the fixed block (13) is provided with a guide rod (1305). The elastic element (1304) and the slider (1303) are both sleeved on the outside of the guide rod (1305) so that the slider (1303) can move along the guide rod (1305). The elastic element (1304) is a spring.

5. A workshop wastewater concentration device according to claim 3, characterized in that: One side of the slider (1303) is set as an inclined surface, and the air inlet (1301) can fit against the inclined surface of the slider (1303) so that the slider (1303) blocks the bottom of the air inlet (1301).

6. The workshop wastewater concentration device according to claim 2, characterized in that: Both the first filter screen (5) and the nozzle (10) are arc-shaped. The bottom of the nozzle (10) is evenly provided with a plurality of spray holes (1002), and each spray hole (1002) is perpendicular to the upper surface of the first filter screen (5). The nozzle (10) is provided with a second filter screen (1003) at its bottom. A connecting pipe (1001) is provided between the nozzle (10) and the water outlet pipe (3), and one end of the connecting pipe (1001) is connected to the bottom of the water outlet pipe (3).

7. A workshop wastewater concentration device according to claim 3, characterized in that: The water outlet pipe (3) is provided with an air outlet pipe (305) inside. The upper end of the air outlet pipe (305) is located at the top of the inside of the water outlet pipe (3), and the lower end of the air outlet pipe (305) is connected to the air outlet hole (1302).

8. A workshop wastewater concentration device according to claim 2, characterized in that: The top of the cylinder (1) and the bottom of the upper cover (4) are provided with fixing rings (7), and the two fixing rings (7) are provided with corresponding fixing holes (702) so as to fix the two fixing rings (7) together by bolts.

9. A workshop wastewater concentration device according to claim 8, characterized in that: Positioning grooves (701) are provided on the contact surfaces of the two fixing rings (7) that are close to each other. The positioning grooves (701) are adapted to the mounting plate (6) so that the mounting plate (6) can be embedded in the positioning grooves (701). Sealing rings (601) are provided on the top and bottom of the mounting plate (6).

10. A workshop wastewater concentration device according to claim 1, characterized in that: A water inlet pipe (2) is provided on one side of the cylinder (1). A water inlet valve (201) and a one-way valve (202) are provided on the water inlet pipe (2). A drain pipe (9) is provided at the bottom of the cylinder (1). A drain valve (901) is provided on the drain pipe (9). A water pump is provided on the water outlet pipe (3). A water outlet valve (303) is provided on the water pump (302). A water pump is provided at one end of the water pump (302).

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