Wastewater treatment equipment for chemical production and use method thereof

Abstract

The present invention relates to the field of wastewater treatment, and in particular to a wastewater treatment device for chemical production and a method of using the same, including a box body and a partition plate, etc.; a water inlet is provided on the left side of the box body; a wastewater treatment system is provided in the box body; and a partition plate is fixedly connected to the right side of the box body. The present invention realizes the suspension support through the first suspension block, so that the scraper and the collection box will rise and fall with the change of the water level, ensuring the scraping effect of the scraper on the scum; the scum that passes over the scraper is collected by the collection box to prevent the scum from passing over the scraper and re-entering the box body; and the wastewater carried in the scum is re-introduced into the box body through the second drain port to prevent the wastewater from occupying the space of the collection box and affecting the collection amount of the collection box, and at the same time, part of the wastewater is collected through the water collection chamber, and then when the collection box is reversed, the wastewater in the water collection chamber will flow downward, flushing the scum in the collection box, and quickly discharging the scum; at the same time, the inner wall of the collection box is flushed.

Description

Technical Field

[0001] The invention relates to the field of wastewater treatment, and in particular to wastewater treatment equipment for chemical production and a use method thereof. Background Art

[0002] After the existing chemical wastewater treatment equipment performs flotation treatment on the wastewater, impurities such as harmful substances and pollutants in the wastewater will be suspended on the surface of the wastewater. In the existing technology, a scraper is usually used to scrape off the scum on the surface of the wastewater; but the amount of wastewater generated in the production process changes at any time, so the water level in the wastewater treatment equipment will also change, but the existing scraper is installed at a fixed height and cannot change with the change of the water level. When the water level is low, the scraper cannot scrape off the surface scum; when the water level is high, the scraper will also scrape the wastewater when scraping off the scum, causing the wastewater and scum to gather and rise on one side of the scraper, and then causing the scum to pass over the scraper, seriously affecting the scraping effect; at the same time, the existing equipment will also scrape the wastewater into the slag discharge tank when scraping off the scum, causing a large amount of wastewater to follow the scraped scum into the subsequent filter press equipment, affecting the subsequent filter press treatment of the scum;

[0003] According to the Chinese patent with publication number: CN219156573U, a flotation machine has a scraping and scraping mechanism; the device separates the scum from the water surface through a rotating device and adapts to water levels of different heights, extracts the scum through a slag extraction device, and sends the scum out of the device in conjunction with a slag delivery device to reduce the accumulation of scum; although the device can adapt to water levels of different heights, it needs to adopt a large number of power structures for adaptation and slag discharge, and the use cost and maintenance cost are extremely high, and the practicality is poor. Summary of the invention

[0004] In order to overcome the disadvantage that the scraper height in the existing wastewater treatment equipment cannot change with the change of the water level, resulting in unsatisfactory scraping effect of the scraper on scum, the present invention provides a wastewater treatment equipment for chemical production and a use method thereof.

[0005] The technical scheme is: a wastewater treatment equipment for chemical production, including a box body and a partition plate; a water inlet is arranged on the left side of the box body; a wastewater treatment system is arranged in the box body; a partition plate is fixedly connected to the right side of the box body; a slag discharge trough is arranged on the right side of the box body, and the slag discharge trough is located on the right side of the partition plate; a first drain port is opened on the lower side of the box body; it also includes a conveyor belt, a slider, a fixed block, a scraper, a collecting box and a first suspension block; two conveyor belts arranged front and back are installed on the upper side of the box body, and the conveyor belts are driven by a motor to move forward and backward, and the conveyor belts are moved backward and forward by the motor. The belt rotates counterclockwise; a number of fixed blocks are fixedly connected to the belt of each conveyor belt; a slide groove is provided in each fixed block; a number of collecting boxes for collecting scum that passes over the scraper are arranged between the two conveyor belts; a slider is fixedly connected to the front and rear sides of each collecting box; each slider slides in the corresponding slide groove; a first suspended block is fixedly connected to the bottom surface of each collecting box; a scraper for scraping off scum is fixedly connected to the side of each collecting box facing the direction of rotation of the conveyor belt; a second drain port is provided on the side of each collecting box close to the scraper.

[0006] Furthermore, the collecting box and the scraper are made of polytetrafluoroethylene.

[0007] Further, with the scraper located at the lower side of the conveyor belt as a reference, the lower side of the scraper is set as a vertical portion, and the upper side is set as an inclined portion inclined from the upper left to the lower right.

[0008] Further, with reference to the collecting box located at the lower side of the conveyor belt, the height of the left side of the collecting box is higher than that of the right side of the collecting box.

[0009] Furthermore, filter cotton is also included; each collecting box is detachably connected with the filter cotton, and a water collecting chamber is formed between the filter cotton and the bottom of the collecting box.

[0010] Furthermore, with reference to the collecting box located at the lower side of the conveyor belt, each second drainage outlet is opened on the right side of the collecting box and is located below the filter cotton.

[0011] Furthermore, it also includes a sliding plate and a second suspension block; the sliding plate is slidably connected inside the partition plate; and the second suspension block is fixedly connected to the upper part of the sliding plate.

[0012] Furthermore, it also includes a guide plate; the guide plate is fixedly connected to the left side of the sliding plate; the guide plate is inclined from the lower left to the upper right, and the left end of the guide plate is located below the water surface.

[0013] Further, taking the scraper on the lower side as an example, the lower side of the vertical portion of each scraper is chamfered.

[0014] A method for using wastewater treatment equipment for chemical production, the specific steps are as follows:

[0015] Step 1: The wastewater generated in the chemical production process is discharged into the box through the water inlet; then the wastewater is subjected to flotation treatment through the wastewater treatment system in the box; after the wastewater is subjected to flotation treatment, the harmful substances, pollutants and impurities in the wastewater will be suspended on the surface of the wastewater;

[0016] Step 2: Then the motor drives the conveyor belt to rotate counterclockwise, which in turn drives the scraper to rotate counterclockwise, scraping the scum suspended on the surface of the wastewater from left to right into the slag discharge tank for discharge;

[0017] Step 3: The scum in the slag discharge tank will flow into the subsequent filter press equipment for filter press treatment; the treated wastewater in the box will be discharged through the first drain port.

[0018] The present invention has the following advantages: when the water level changes up and down, the scraper and the collection box will rise and fall with the change of the water level due to the suspension support of the first suspension block. Therefore, no matter whether the water level rises or falls, the position relationship between the scraper and the water surface is always maintained in the state shown in the figure, ensuring the scraper's scraping effect on the scum;

[0019] The scum that passes over the scraper is collected by the collection box to prevent the scum from passing over the scraper and re-entering the box body, thereby affecting the scraping effect of the scraper; and the waste water carried by the scum is re-introduced into the box body through the second drainage port to prevent the waste water from occupying the space of the collection box and affecting the collection amount of the collection box. At the same time, part of the waste water is collected by the water collection chamber, and then when the collection box is reversed, the waste water in the water collection chamber will flow downward to flush the scum in the collection box and quickly discharge the scum; at the same time, the inner wall of the collection box is flushed to prevent too much scum from adhering to the inner wall of the collection box;

[0020] Through the second suspension block, the sliding plate and the guide plate can also change with the change of the water surface height, preventing wastewater from leaking from the upper side of the partition plate into the slag discharge trough, causing a large amount of wastewater to follow the scraped scum into the subsequent filter press equipment, affecting the subsequent filter press treatment of the scum. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the wastewater treatment equipment for chemical production of the present invention;

[0022] Figure 2 It is a cross-sectional view of the box of the present invention;

[0023] Figure 3 It is a schematic diagram of the combined three-dimensional structure of the conveyor belt, the fixing block and the collecting box of the present invention;

[0024] Figure 4 It is a schematic diagram of the three-dimensional structure of the slider, the first suspension block and the scraper assembly of the present invention;

[0025] Figure 5 It is a schematic diagram of the combined three-dimensional structure of the partition plate, the sliding plate, the second suspension block and the guide plate of the present invention.

[0026] The names and serial numbers of the parts in the figure are: 1-box, 1001-water inlet, 1002-slag discharge trough, 1003-first drainage outlet, 2-conveyor belt, 101-partitioning plate, 102-sliding block, 103-fixed block, 10301-chute, 104-scraper, 105-collecting box, 10501-second drainage outlet, 10502-water collecting chamber, 106-filter cotton, 107-first suspension block, 201-sliding plate, 202-second suspension block, 203-guide plate, 1a-water level line. DETAILED DESCRIPTION

[0027] The technical solution is further described below in conjunction with specific embodiments. It should be noted that the words indicating directions such as up, down, left, and right mentioned in this article are only for the position of the structure shown in the corresponding drawings. The serial numbers of the parts in this article, such as first, second, etc., are only used to distinguish the objects described and do not have any order or technical meaning. The words such as connection and coupling in this application include direct and indirect connection (coupling) unless otherwise specified.

[0028] Embodiment 1: A wastewater treatment equipment for chemical production, such as Figure 1-Figure 4 As shown, it includes a box body 1 and a partition plate 101; a water inlet 1001 is arranged on the left side of the box body 1; a wastewater treatment system is arranged in the box body 1; the partition plate 101 is fixedly connected to the right side of the box body 1; a slag discharge trough 1002 is arranged on the right side of the box body 1, and the slag discharge trough 1002 is located on the right side of the partition plate 101; a first drain port 1003 is opened on the lower side of the box body 1;

[0029] It also includes a conveyor belt 2, a slider 102, a fixed block 103, a scraper 104, a collecting box 105 and a first suspended block 107; two conveyor belts 2 arranged front and back are installed on the upper side of the box body 1, and the belts of the conveyor belts 2 are driven by a motor to rotate counterclockwise based on the view from the front to the back; eight fixed blocks 103 are fixedly connected to the belt of each conveyor belt 2; a slide groove 10301 is provided in each fixed block 103; eight collecting boxes 105 are arranged between the two conveyor belts 2; a slider 102 is fixedly connected to the front and rear sides of each collecting box 105; each slider 102 slides in the corresponding slide groove 10301; the bottom surface of each collecting box 105 is fixedly connected to the first suspended block 107; each collecting box 105 is fixedly connected to the scraper 104 on the side facing the rotation direction of the conveyor belt 2; each collecting box 105 is provided with a second drainage outlet 10501 on the side close to the scraper 104.

[0030] The collecting box 105 and the scraper 104 are made of polytetrafluoroethylene, which is light in weight and has high corrosion resistance, which greatly improves the service life of the scraper 104, while reducing the operating power of the driving motor of the conveyor belt 2, reducing energy consumption and reducing costs.

[0031] like Figure 3 As shown: taking the scraper 104 located at the lower side of the conveyor belt 2 as a reference, the lower side of the scraper 104 is set as a vertical portion, and the upper side is set as an inclined portion inclined from the upper left to the lower right.

[0032] like Figure 3 As shown: taking the collecting box 105 located at the lower side of the conveyor belt 2 as a reference, the height of the left side of the collecting box 105 is higher than the right side of the collecting box 105 .

[0033] It also includes filter cotton 106 ; each collection box 105 is detachably connected with the filter cotton 106 , and a water collection chamber 10502 is formed between the filter cotton 106 and the bottom of the collection box 105 .

[0034] like Figure 3 As shown: taking the collecting box 105 located at the lower side of the conveyor belt 2 as a reference, each second drainage port 10501 is opened on the right side of the collecting box 105 and is located below the filter cotton 106.

[0035] First, Figure 1 and Figure 2 As shown: chemical wastewater enters the box 1 from the water inlet 1001; then the wastewater is subjected to flotation treatment through the wastewater treatment system in the box 1; after the wastewater is subjected to flotation treatment, impurities such as harmful substances and pollutants in the wastewater will be suspended on the surface of the wastewater. At this time, based on the view from the front to the back, the belt of the conveyor belt 2 is driven by the motor to rotate counterclockwise, thereby driving the scraper 104 to move counterclockwise. When the scraper 104 rotates to the lower side of the conveyor belt 2, the scraper 104 contacts the water surface on the left side of the box 1, and then the scum suspended on the surface of the wastewater is scraped from left to right to the slag discharge trough 1002, and the scum in the slag discharge trough 1002 will flow into the subsequent filter press equipment for filter press treatment, and the wastewater treated by the wastewater treatment system in the box 1 is discharged through the first drain port 1003.

[0036] Since the amount of wastewater generated in the production process changes at any time, the water level in the wastewater treatment equipment will also change. However, the existing scraper 104 is installed at a fixed height and cannot change with the change of the water level. When the water level is low, the scraper 104 cannot scrape off the surface scum; when the water level is high, the scraper 104 will also scrape the wastewater when scraping off the scum, causing the wastewater to gather and rise on one side of the scraper 104, causing the scum to pass over the scraper 104, seriously affecting the scraping effect, and a large amount of wastewater will also be scraped into the slag discharge tank 1002 when scraping off the scum, affecting the subsequent filter press treatment of the scum. According to a flotation machine scraping and slag scraping mechanism disclosed in a Chinese patent with publication number: CN219156573U, although the device can adapt to water levels of different heights, it needs to adopt a large number of power structures for adaptation and impurity removal, and the use cost and maintenance cost are extremely high, and the practicality is poor.

[0037] To solve the above problems, the present invention proposes the following method: Figure 2 and Figure 3 As shown in the figure, with the view from the front to the back as the reference, the belt of the conveyor belt 2 is driven by the motor to rotate counterclockwise, thereby driving the fixed block 103 to move. When the fixed block 103 moves to the lower side of the conveyor belt 2, the collection box 105 falls downward under the influence of gravity, and the slider 102 slides downward in the slide groove 10301, thereby driving the collection box 105 and the first suspension block 107 to move downward. The first suspension block 107 will contact the water surface. At this time, under the influence of buoyancy, the first suspension block 107 will Figure 3 As shown, it floats on the water level line 1a, the wastewater covers half of the first suspension block 107, and the vertical part of the lower side of the scraper 104 is lower than the water surface; when the water level changes up and down, under the influence of the suspension support of the first suspension block 107, the scraper 104 and the collection box 105 will rise and fall with the change of the water level. During this process, the slider 102 slides adaptively in the slide groove 10301, thereby driving the scraper 104 and the collection box 105 to rise and fall; therefore, regardless of whether the water level rises or falls, the position relationship between the scraper 104 and the water surface is always maintained as shown. Figure 3 The state shown ensures that the scraper 104 has a scraping effect on the scum, thereby overcoming the problem of poor scraping effect of the scum caused by water level changes.

[0038] And in the process of scraping the scum, the reference is from front to back. Figure 3Taking the scraper 104 on the lower middle side as an example, the vertical portion of the lower side of the scraper 104 is located below the water surface, and the inclined portion of the upper side of the scraper 104 is located above the water surface, so that more scum can be scraped by the vertical portion of the lower side of the scraper 104 during the scraping process, and the accumulated scum is guided into the collecting box 105 by the inclined portion of the scraper 104, and then the scum that passes over the scraper 104 is collected by the collecting box 105; and the height of the left side of the collecting box 105 is greater than the height of the right side, so as to prevent waste water and scum from passing over the left side of the collecting box 105 when entering the collecting box 105; when the collecting box 105 moves to the right side of the conveyor belt 2, the collecting box 105 moves upward with the conveyor belt 2, and then the collecting box 105 is reversed, and then the scum collected in the collecting box 105 is poured into the slag discharge trough 1002 for discharge, and the state of the inverted collecting box 105 is as shown Figure 3 As shown in the collection box 105 on the right side.

[0039] Furthermore, when the scum flows into the collection box 105, the scum will also carry wastewater into the collection box 105. At this time, the wastewater carried in the scum is re-introduced into the box body 1 through the second drain port 10501 opened on the collection box 105, so as to avoid the wastewater occupying the space of the collection box 105 and affecting the collection amount of the collection box 105; and by providing a detachable and replaceable filter cotton 106 in the collection box 105, after the wastewater and scum enter the collection box 105, the wastewater will first pass through the filter cotton 106 and then flow into the water collection chamber 10502, and then be discharged from the second drain port 10501 on the upper side of the water collection chamber 10502, so as to filter out a large amount of wastewater carried in the scum, and reduce the workload of subsequent scum filter press treatment;

[0040] As described above, the present invention designs the collection box 105 and guides the scum into the collection box 105 through the inclined portion of the scraper 104, so that the scum on the water surface can be collected into the collection box 105, and the scum can be scraped off even when there is a large amount of scum on the water surface.

[0041] Furthermore, the waste water will be discharged from the second drain port 10501 only when it exceeds the height of the second drain port 10501. Therefore, a small amount of waste water can be stored in the water collecting chamber 10502. Then, when the collection box 105 is turned upside down, the waste water in the water collecting chamber 10502 flows downward to wash the scum in the collection box 105 and quickly discharge the scum. At the same time, the inner wall of the collection box 105 is washed to prevent excessive scum from adhering to the inner wall of the collection box 105.

[0042] It should be noted that since the collection box 105 is provided with a filter cotton 106, the filter cotton 106 can slow down the flow of water. Therefore, when the collection box 105 is inverted, the waste water in the water collection chamber 10502 will not be lost quickly due to the tilt of the collection box 105. The second drain port 10501 is located on the right side of the filter cotton 106. Figure 3As shown: in the process of the collection box 105 rotating from the lower side of the conveyor belt 2 to the upper side of the conveyor belt 2, the relative position of the second drain port 10501 in the water collecting chamber 10502 changes from the upper right side to the left side, thereby avoiding excessive waste water from being lost from the second drain port 10501. Therefore, when the collection box 105 is completely inverted, there is still waste water to wash the scum in the collection box 105 and the side inner wall of the collection box 105, ensuring the residual waste water in the water collecting chamber 10502 has a flushing effect on the inner wall of the collection box 105.

[0043] Embodiment 2: Based on embodiment 1, Figure 5 As shown, it also includes a sliding plate 201 and a second suspension block 202 ; the sliding plate 201 is slidably connected inside the partition plate 101 ; and the second suspension block 202 is fixedly connected to the upper part of the sliding plate 201 .

[0044] It also includes a guide plate 203; the guide plate 203 is fixedly connected to the left side of the sliding plate 201; the guide plate 203 is tilted from the lower left to the upper right, and the left end of the guide plate 203 is located below the water surface, and the suspension force of the second suspension block 202 is greater than the total gravity of the sliding plate 201, the guide plate 203, the scraper 104 and the collection box 105.

[0045] Taking the scraper 104 on the lower side as an example, the lower side of the vertical portion of each scraper 104 is chamfered.

[0046] A method for using wastewater treatment equipment for chemical production, the specific steps are as follows:

[0047] Step 1: The wastewater generated in the chemical production process is discharged into the box 1 through the water inlet 1001; and then the wastewater is subjected to flotation treatment through the wastewater treatment system in the box 1; after the wastewater is subjected to flotation treatment, harmful substances, pollutants and impurities in the wastewater will be suspended on the surface of the wastewater;

[0048] Step 2: Then, the conveyor belt 2 is driven by the motor to rotate counterclockwise, thereby driving the scraper 104 to rotate counterclockwise, scraping the scum suspended on the surface of the wastewater from left to right into the scum discharge tank 1002 for discharge;

[0049] Step three: the scum in the slag discharge tank 1002 will flow into the subsequent filter press equipment for filter press treatment; the treated wastewater in the box body 1 is discharged through the first drain port 1003.

[0050] The sliding plate 201 is suspended above the water surface by the second suspension block 202, so that the height of the sliding plate 201 will also change with the water surface height, thereby preventing wastewater from leaking from the upper side of the partition plate 101 into the slag discharge trough 1002; and the height of the sliding plate 201 is continuously higher than the water surface, ensuring that under normal circumstances, scum and wastewater cannot cross the sliding plate 201 and enter the slag discharge trough 1002.

[0051] However, when the scraper 104 moves to the sliding plate 201, the sliding plate 201 will block the scraper 104, affecting the normal operation of the equipment; therefore, a guide plate 203 inclined from the lower left to the upper right is provided on the left side of the sliding plate 201, and the left end of the guide plate 203 is lower than the vertical part of the lower side of the scraper 104. When the scraper 104 scrapes the scum to the guide plate 203, the guide plate 203 guides the scum to the upper side of the sliding plate 201 and discharges it into the scum discharge groove 1002 for discharge, and when the scraper 104 moves to the guide plate 203, it is suspended and supported by the second suspension block 202, and the suspension force of the second suspension block 202 is greater than Due to the total gravity of the sliding plate 201, the guide plate 203, the scraper 104 and the collecting box 105, the second suspension block 202 can suspend and support the sliding plate 201, the guide plate 203, the scraper 104 and the collecting box 105 together, and then lift the scraper 104 and the collecting box 105 upward. At this time, the slider 102 slides upward in the slide groove 10301, and the scraper 104 moves upward and then passes over the sliding plate 201. The lower side of the vertical part of the scraper 104 is chamfered to reduce the sliding resistance of the scraper 104 when it passes over the sliding plate 201, while reducing the wear of the scraper 104 and the sliding plate 201 and increasing the service life.

[0052] The above is a detailed introduction to the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for general technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A wastewater treatment device for chemical production, comprising a housing (1) and a partition plate (101); a water inlet (1001) is arranged on the left side of the housing (1); a wastewater treatment system is arranged in the housing (1); the partition plate (101) is fixedly connected to the right side of the housing (1); a slag discharge trough (1002) is arranged on the right side of the housing (1), and the slag discharge trough (1002) is located on the right side of the partition plate (101); a first drainage outlet (1003) is opened on the lower side of the housing (1); It is characterized in that The box body (1) also comprises a conveyor belt (2), a slider (102), a fixed block (103), a scraper (104), a collecting box (105) and a first suspended block (107); two conveyor belts (2) arranged front and back are installed on the upper side of the box body (1); the belts of the conveyor belts (2) are driven by a motor to rotate counterclockwise, based on the view from the front to the back; a plurality of fixed blocks (103) are fixedly connected to the belt of each conveyor belt (2); a chute (10301) is provided in each fixed block (103); a plurality of guide rails (10301) for collecting the overcrowded items are provided between the two conveyor belts (2). A collection box (105) for collecting scum that passes through the scraper (104); a slider (102) is fixedly connected to the front and rear sides of each collection box (105); each slider (102) slides in a corresponding slide groove (10301); a first suspension block (107) is fixedly connected to the bottom surface of each collection box (105); a scraper (104) for scraping off scum is fixedly connected to the side of each collection box (105) facing the rotation direction of the conveyor belt (2); and a second drainage port (10501) is provided on the side of each collection box (105) close to the scraper (104); It also includes a sliding plate (201) and a second suspension block (202); the sliding plate (201) is slidably connected inside the partition plate (101); and the second suspension block (202) is fixedly connected to the upper part of the sliding plate (201); It also includes a guide plate (203); the guide plate (203) is fixedly connected to the left side of the sliding plate (201); the guide plate (203) is arranged to be inclined from the lower left to the upper right, and the left end of the guide plate (203) is located below the water surface.

2. A chemical production wastewater treatment equipment according to claim 1, characterized in that: The collecting box (105) and the scraper (104) are made of polytetrafluoroethylene.

3. A chemical production wastewater treatment equipment according to claim 2, characterized in that: Taking the scraper (104) located at the lower side of the conveyor belt (2) as a reference, the lower side of the scraper (104) is set as a vertical portion, and the upper side is set as an inclined portion inclined from the upper left to the lower right.

4. A chemical production wastewater treatment equipment according to claim 2, characterized in that: Taking the collecting box (105) located at the lower side of the conveyor belt (2) as a reference, the height of the left side of the collecting box (105) is higher than the right side of the collecting box (105).

5. A chemical production wastewater treatment equipment according to claim 4, characterized in that: It also includes filter cotton (106); each collection box (105) is detachably connected with the filter cotton (106), and a water collection chamber (10502) is formed between the filter cotton (106) and the bottom of the collection box (105).

6. A chemical production wastewater treatment equipment according to claim 5, characterized in that: Taking the collecting box (105) located at the lower side of the conveyor belt (2) as a reference, each second drainage port (10501) is opened on the right side of the collecting box (105) and is located below the filter cotton (106).

7. A method for using a wastewater treatment device for chemical production, using the wastewater treatment device for chemical production according to any one of claims 1 to 6, characterized in that: The specific steps are as follows: Step 1: discharge the wastewater generated in the chemical production process into the box (1) through the water inlet (1001); then flotation treatment is performed on the wastewater through the wastewater treatment system in the box (1); after the wastewater is flotation treated, harmful substances, pollutants and impurities in the wastewater will be suspended on the surface of the wastewater; Step 2: Then, the conveyor belt (2) is driven by a motor to rotate counterclockwise, thereby driving the scraper (104) to rotate counterclockwise, scraping the scum suspended on the surface of the wastewater from left to right into the scum discharge trough (1002) for discharge; Step three: The scum in the slag discharge tank (1002) will flow into the subsequent filter press equipment for filter press treatment; the treated wastewater in the box (1) will be discharged through the first drain port (1003).

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