A sewage purification device for sewage treatment of a steel mill

Abstract

The application discloses a sewage purification equipment for steel mill sewage treatment and relates to the technical field of sewage purification. Since the newly introduced sewage is not limited and directly impacts the liquid surface of the oil removal area of the air flotation method, the oil dirt is mixed with the sewage again, and the sewage without the removed oil dirt can directly impact the drainage area, so that there is not enough time for oil removal. The sewage purification equipment for steel mill sewage treatment is characterized by cooperation of the zigzag plate and the flow guide plate, protection of the surface oil dirt of the oil removal area of the air flotation method by the vertical zigzag of the zigzag plate, and the fact that the newly introduced sewage must pass through the bottom of the zigzag plate and be guided to the oil removal position of the air flotation method by the flow guide plate, so that the sewage is prevented from impacting the surface oil dirt of the oil removal area under the pressure of the introduced sewage, the oil dirt is prevented from being mixed with the sewage again, the oil removal effect is affected, and the sewage without the removed oil dirt is prevented from directly impacting the drainage area, so that the oil removal work cannot be completed.

Description

Technical Field

[0001] This invention relates to the field of wastewater purification technology, specifically to a wastewater purification device for treating wastewater from a steel plant. Background Technology

[0002] Wastewater purification in steel plant wastewater treatment is the core link to ensure that wastewater meets discharge standards or is recycled. Its purpose is to remove various pollutants generated during the steelmaking process, such as suspended solids, heavy metals, oils, and organic matter. Steel plant wastewater has a complex composition, including steelmaking dust washing water, equipment cooling water, and rolling mill emulsion. Purification requires a combination of multiple processes and staged treatment. Wastewater usually contains floating oil and emulsified oil. Emulsified oil has strong stability and needs to be demulsified. After demulsification, the emulsified oil is usually separated from the wastewater by air flotation. Air bubbles are introduced into the wastewater. The air bubbles adsorb oil droplets or flocs and carry them to the surface. After reaching the surface, the oil is discharged, thus separating it from the wastewater.

[0003] During the process of removing oil from wastewater using the air flotation method, the newly introduced wastewater is not restricted and directly impacts the liquid surface of the air flotation oil removal area, causing the oil to mix with the wastewater again. At the same time, wastewater that has not had its oil removed may directly impact the drainage area, resulting in insufficient time for oil removal. Summary of the Invention

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A wastewater purification device for treating wastewater from a steel plant, comprising:

[0006] A purification tank, wherein an inlet pipe is fixedly installed at one end of the purification tank and an outlet pipe is fixedly installed at the other end of the purification tank, and an oil guide groove and a slag guide groove are fixedly installed on the top of the side of the purification tank connected to the inlet pipe.

[0007] An air guiding mechanism is installed at the bottom of the inner wall of the purification tank. An air pump is fixedly installed on the outside of the purification tank. The air outlet of the air pump is connected to the air guiding mechanism through a pipe.

[0008] The diversion mechanism is installed inside the purification tank, located directly above the air guiding mechanism, and corresponding to the oil guiding tank.

[0009] A slag collection trough is fixedly installed on the bottom of the inner wall of the purification tank near the water inlet pipe. A grating plate is fixedly installed on the top of the slag collection trough. The top of the grating plate is inclined towards the water inlet pipe, and grating grooves are evenly opened on the outer side of the grating plate. A top plate is fixedly installed on the top of the grating plate. A zigzag plate is fixedly installed on the side of the top plate away from the water inlet pipe. The zigzag plate and the guide plate work together to protect the surface oil stains in the air flotation oil removal area by the vertical bending of the zigzag plate. The newly introduced sewage must pass through the bottom of the zigzag plate and be guided to the air flotation oil removal position by the guide plate. This avoids the sewage impacting the surface oil stains in the oil removal area under the pressure of the introduced sewage, which would cause the oil stains to mix with the sewage again and affect the oil removal effect. At the same time, it prevents sewage that has not been de-oiled from directly impacting the drainage area, which would prevent the oil removal work from being completed. The end of the zigzag plate away from the top plate bends vertically downward, and a guide plate is fixedly installed at the bottom of the zigzag plate. The end of the guide plate away from the zigzag plate is inclined downward towards the air removal mechanism.

[0010] Preferably, the top of the top plate is flush with the top of the purification tank, and the sludge guide channel is located between the top plate and the water inlet pipe. By insulating the water inlet pipe in conjunction with the bar screen, the wastewater is prevented from directly impacting the bar screen when it is introduced. Instead, the wastewater impacts the sludge collection channel, allowing solid impurities that have sunk to the bottom to be collected smoothly. At the same time, the impact pressure is prevented from carrying impurities after the wastewater directly impacts the bar screen, which would cause the impurities to get stuck in the bar screen grooves and affect the filtration effect of the bar screen. The end of the water inlet pipe near the purification tank is installed at a downward inclination.

[0011] Preferably, the diversion mechanism includes a top groove plate, which is slidably installed inside the purification tank. The top groove plate is positioned opposite the oil guide groove and is located directly above the gas guiding mechanism. A sloping groove is formed at the center of the top of the top groove plate, and the end of the sloping groove near the oil guide groove slopes downward. Through grooves are evenly formed in the sloping groove of the top groove plate. Through the cooperation of the through groove and the sloping groove of the top groove plate, the through groove provides a path for gas discharge. When the liquid surface fluctuates, the oil on the liquid surface can enter the sloping groove through the through groove. Then, the downward slope of the sloping groove near the oil guide groove guides the oil on the liquid surface to the oil guide groove, ensuring the oil removal effect when the liquid surface fluctuates greatly. A side float is fixedly installed at the bottom of the top groove plate. The side float is symmetrically installed along the center of the axis of the top groove plate and the side float is a hollow structure.

[0012] Preferably, a side sealing plate is fixedly installed on the side of the top trough plate near the water outlet pipe. The side sealing plate is located between the air guiding mechanism and the water outlet pipe, and the bottom of the side sealing plate is tightly fitted to the bottom of the inner wall of the purification tank. An inclined sealing plate is fixedly installed on the side of the side sealing plate near the air guiding mechanism. Through the cooperation of the inclined sealing plate and the side sealing plate, when the liquid level has not reached the oil guiding trough position, the inclined sealing plate and the side sealing plate block the path of sewage to the water outlet pipe position, so as to avoid the situation that the surface oil cannot be discharged through the oil guiding trough when the amount of sewage introduced is small, and the situation that it is directly discharged with the sewage through the water outlet pipe will affect the oil removal effect. The end of the inclined sealing plate away from the side sealing plate is inclined downward to the air guiding mechanism, and a side gasket is fixedly installed on the end of the inclined sealing plate away from the side sealing plate.

[0013] Preferably, the air guiding mechanism includes a fixed frame, which is fixed to the bottom of the inner wall of the purification tank and located directly below the top groove plate. The side of the fixed frame near the water outlet pipe is tightly fitted to the outer side of the side pad. A circular groove plate is fixedly installed on the top of the inner wall of the fixed frame. Circular grooves are evenly distributed on the top of the circular groove plate, and air guiding chambers are fixedly installed in each of the circular grooves. Air holes are evenly distributed on the top of each air guiding chamber. A fixed pipe is fixedly installed at the bottom of each air guiding chamber. A diversion pipe is fixedly installed at the bottom of the fixed pipe. A connecting pipe is fixedly installed at one end of the diversion pipe. The end of the connecting pipe away from the diversion pipe passes through the fixed frame and extends to the outside of the purification tank. The air outlet of the air pump is connected to the connecting pipe through a pipe.

[0014] Preferably, the top end of the fixed tube penetrates through the air-guiding chamber and extends into it. A shaft block is fixedly installed at the center of the top of the air-guiding chamber. An impeller is rotatably installed on the outer side of the shaft block. An inner sliding plate is slidably installed on the outer side of the fixed tube. Through the cooperation of the inner sliding plate and the elastic gasket ring, when the air pressure inside the air-guiding chamber is low, the top block blocks the air holes. When the internal air pressure reaches a certain level, the pressure can be compressed by the inner sliding plate to open the air holes, thus preventing sewage from directly entering the air-guiding chamber and causing flocculent matter to block the air holes and affect air guidance. The inner sliding plate is located inside the air-guiding chamber. A top block is fixedly installed on the top of the inner sliding plate. The top blocks are evenly installed on the top of the inner sliding plate, and each top block corresponds to one of the air holes in the air-guiding chamber. An elastic gasket ring is fixedly installed between the bottom of the inner sliding plate and the inner wall of the air-guiding chamber.

[0015] This invention provides a wastewater purification device for steel plant wastewater treatment. It has the following beneficial effects:

[0016] I. The wastewater purification equipment for the steel plant's wastewater treatment uses a combination of zigzag plates and guide plates. The vertical bending of the zigzag plates protects the surface oil stains in the air flotation oil removal area, ensuring that newly introduced wastewater must pass through the bottom of the zigzag plates and be guided by the guide plates to the air flotation oil removal position. This prevents the wastewater from impacting the surface oil stains in the oil removal area under the pressure of the introduced wastewater, causing the oil stains to mix with the wastewater again and affecting the oil removal effect. At the same time, it prevents wastewater that has not been de-oiled from directly impacting the drainage area, thus preventing the oil removal work from being completed.

[0017] Second, the wastewater purification equipment for the steel plant's wastewater treatment uses an inclined inlet pipe in conjunction with a grating plate to prevent wastewater from directly impacting the grating plate during wastewater introduction. Instead, the wastewater impacts the slag collection tank, allowing solid impurities that have sunk to the bottom to be collected smoothly. At the same time, it prevents the impact pressure from carrying impurities and causing them to get stuck in the grating grooves, thus affecting the filtration effect of the grating plate.

[0018] Third, the wastewater purification equipment for the steel plant's wastewater treatment uses a combination of a through-channel and an inclined channel in the top trough plate. This allows the through-channel to provide a path for gas discharge, while when the liquid level fluctuates, oil on the liquid surface can enter the inclined channel through the through-channel. Then, by utilizing the downward inclination of the inclined channel near the oil guide channel, the oil on the liquid surface is guided to the oil guide channel, ensuring the oil removal effect when the liquid level fluctuates greatly.

[0019] IV. The wastewater purification equipment for the steel plant's wastewater treatment uses a combination of inclined sealing plates and side sealing plates to block the path of wastewater flowing to the outlet pipe when the liquid level has not reached the oil guide tank. This prevents the surface oil from being unable to be discharged through the oil guide tank when the amount of wastewater introduced is small, thus avoiding the situation where the oil is directly discharged with the wastewater through the outlet pipe, which would affect the oil removal effect.

[0020] 5. The wastewater purification equipment for the steel plant's wastewater treatment uses an inner sliding plate and an elastic gasket ring. When the air pressure inside the air chamber is low, the top block blocks the air holes. When the internal air pressure reaches a certain level, the pressure can be compressed through the inner sliding plate to change the elastic gasket ring, causing the top block to open the air holes. This prevents wastewater from directly entering the air chamber and causing flocculent matter to block the air holes, thus affecting air delivery. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a wastewater purification device for treating wastewater in a steel plant according to the present invention;

[0022] Figure 2 This is a side view of the structure of a wastewater purification device for treating wastewater in a steel plant according to the present invention;

[0023] Figure 3 This is a structural cross-sectional view of a wastewater purification device for steel plant wastewater treatment according to the present invention;

[0024] Figure 4 This is a sectional side view of a wastewater purification device for treating wastewater in a steel plant according to the present invention.

[0025] Figure 5 This is a schematic diagram showing the position and structure of the flow splitting mechanism and the air guiding mechanism of the present invention;

[0026] Figure 6 This is a bottom view of the diversion mechanism of the present invention;

[0027] Figure 7 This is a schematic diagram of the air guiding mechanism of the present invention;

[0028] Figure 8 This is a cross-sectional view of the air guiding mechanism of the present invention;

[0029] Figure 9 This is a partial structural schematic diagram of the air guiding mechanism of the present invention;

[0030] Figure 10 This is a partial structural cross-sectional view of the air guiding mechanism of the present invention.

[0031] In the diagram: 1. Purification tank; 2. Diversion mechanism; 3. Air guiding mechanism; 4. Water inlet pipe; 5. Slag guide trough; 6. Oil guide trough; 7. Air pump; 8. Water outlet pipe; 9. Grating plate; 10. Slag collection trough; 11. Guide plate; 12. Bending plate; 13. Top plate; 21. Top trough plate; 22. Side sealing plate; 23. Slanted sealing plate; 24. Side float; 25. Side pad; 301. Fixed frame; 302. Circular trough plate; 303. Impeller; 304. Connecting pipe; 305. Diversion pipe; 306. Air guiding chamber; 307. Shaft block; 308. Inner sliding plate; 309. Fixed pipe; 310. Elastic washer ring; 311. Top block. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] First embodiment, such as Figures 1 to 4 As shown, the present invention provides a technical solution:

[0034] A wastewater purification device for treating wastewater from a steel plant, comprising:

[0035] Purification tank 1, with an inlet pipe 4 fixedly installed at one end of purification tank 1 and an outlet pipe 8 fixedly installed at the other end of purification tank 1. An oil guide groove 6 and a slag guide groove 5 are fixedly installed on the top of the side of purification tank 1 connected to the inlet pipe 4.

[0036] The air guiding mechanism 3 is installed at the bottom of the inner wall of the purification tank 1. An air pump 7 is fixedly installed on the outside of the purification tank 1. The air outlet of the air pump 7 is connected to the air guiding mechanism 3 through a pipe.

[0037] Diverting mechanism 2 is installed inside the purification tank 1. Diverting mechanism 2 is located directly above the air guiding mechanism 3 and corresponds to the oil guiding tank 6.

[0038] A sludge collection tank 10 is fixedly installed on the bottom of the inner wall of the purification tank 1, near the inlet pipe 4. A grating plate 9 is fixedly installed on the top of the sludge collection tank 10. During the process of sewage entering the purification tank 1 through the inlet pipe 4, the inclination of the inlet pipe 4 causes the sewage to impact downwards at an angle, flowing towards the sludge collection tank 10, preventing the sewage from directly impacting the grating plate 9. Subsequently, with the continuous introduction of sewage, the liquid level gradually rises, reaching the grating plate 9. The grating plate 9 blocks floating foreign objects in the sewage, and as the liquid level gradually rises, it is guided by the grating plate 9 into the sludge guide tank 5. The sewage at the top carries the floating impurities through the sludge guide tank 5 for collection. The top of the grating plate 9 faces... The inlet pipe 4 is inclined, and the outer side of the grating plate 9 is evenly provided with grating grooves. A top plate 13 is fixedly installed on the top of the grating plate 9. A bent plate 12 is fixedly installed on the side of the top plate 13 away from the inlet pipe 4. The end of the bent plate 12 away from the top plate 13 is bent vertically downward. The sewage passing through the grating plate 9 enters the interior of the bent plate 12. The bent plate 12 blocks the sewage passing through the grating plate 9, so that the sewage passing through the grating plate 9 is blocked by the vertical surface of the end of the bent plate 12 away from the top plate 13, and makes it flow downward. It is guided by the bottom of the guide plate 11 to the area of ​​the air guide mechanism 3. The bottom end of the bent plate 12 is fixedly installed with the guide plate 11. The end of the guide plate 11 away from the bent plate 12 is inclined downward to the side of the air guide mechanism 3.

[0039] The top of the top plate 13 is flush with the top of the purification tank 1. The slag guide trough 5 is located between the top plate 13 and the water inlet pipe 4. The end of the water inlet pipe 4 closest to the purification tank 1 is installed at a downward angle.

[0040] The second embodiment is based on the first embodiment; please refer to [link / reference]. Figures 5 to 6As shown, the diversion mechanism 2 includes a top groove plate 21, which is slidably installed inside the purification tank 1. The top groove plate 21 is positioned opposite to the oil guide groove 6. The groove of the top groove plate 21 provides a path for gas discharge. When the sewage level is low, the sewage does not contact the side float 24 and cannot generate buoyancy to push the top groove plate 21 upward inside the purification tank 1. At this time, the bottom of the side sealing plate 22 contacts the inner wall of the purification tank 1, restricting the sewage flow to the side of the side sealing plate 22 near the outlet pipe 8. At the same time, the side pad strip 25 contacts the outer side of the fixing frame 301, assisting the side sealing plate 22 in blocking the flow of sewage. The top groove plate 21 is located directly above the air guide mechanism 3, and the top of the top groove plate 21... A sloping groove is provided at the center of the top trough plate 21, and the end of the sloping groove near the oil guide groove 6 is inclined downward. Through grooves are evenly provided at the sloping groove of the top trough plate 21. As the liquid level rises, after contacting the side float 24, the side float 24 generates buoyancy, pushing the top trough plate 21 upward, opening the path for the oil at the liquid level to flow into the oil guide groove 6. At the same time, the side pad strip 25 disengages from the contact with the fixed frame 301, and the side sealing plate 22 opens the path for the bottom sewage to flow into the outlet pipe 8, so that the bottom sewage can be discharged through the outlet pipe 8. The bottom of the top trough plate 21 is fixedly installed with a side float 24, which is symmetrically installed at the center of the axis of the top trough plate 21, and the side float 24 is a hollow structure.

[0041] A side sealing plate 22 is fixedly installed on the side of the top trough plate 21 near the water outlet pipe 8. The side sealing plate 22 is located between the air guiding mechanism 3 and the water outlet pipe 8, and the bottom of the side sealing plate 22 is tightly fitted to the bottom of the inner wall of the purification tank 1. A slanted sealing plate 23 is fixedly installed on the side of the side sealing plate 22 near the air guiding mechanism 3. The end of the slanted sealing plate 23 away from the side sealing plate 22 is inclined downward to the air guiding mechanism 3, and a side pad strip 25 is fixedly installed on the end of the slanted sealing plate 23 away from the side sealing plate 22.

[0042] The third embodiment is based on embodiments one and two; please refer to [link / reference]. Figures 7 to 10As shown, the air guiding mechanism 3 includes a fixed frame 301, which is fixed to the bottom of the inner wall of the purification tank 1 and located directly below the top trough plate 21. The side of the fixed frame 301 closest to the water outlet pipe 8 is tightly fitted to the outer side of the side pad 25. A circular groove plate 302 is fixedly installed on the top of the inner wall of the fixed frame 301. Circular grooves are evenly distributed on the top of the circular groove plate 302, and air guiding chambers 306 are fixedly installed at each of the circular grooves. Air holes are evenly distributed on the top of the air guiding mechanism 306. After the sewage reaches the top of the air guiding mechanism 3, the air guided by the air pump 7 is guided through the connecting pipe 304 to the diversion pipe 305. Subsequently, the gas is guided through the fixed pipe 309 to the air guiding chamber 306, allowing the air to enter above the inner sliding plate 308. At this time, the air guiding chamber 306... The vent of the air chamber 6 is blocked by the top block 311, preventing gas from escaping from the vent of the air chamber 306. As gas is continuously introduced, the air pressure at the top of the inner sliding plate 308 gradually increases, causing the inner sliding plate 308 to compress the elastic gasket 310 under pressure. This causes the inner sliding plate 308 to drive the top block 311 downward inside the air chamber 306, opening the vent of the air chamber 306 and allowing the high-pressure gas inside to be quickly discharged through the vent. The bottom of the air chamber 306 is fixedly equipped with a fixed pipe 309, and the bottom of the fixed pipe 309 is fixedly equipped with a diversion pipe 305. One end of the diversion pipe 305 is fixedly equipped with a connecting pipe 304. The end of the connecting pipe 304 away from the diversion pipe 305 passes through the fixed frame 301 and extends to the outside of the purification tank 1. The outlet of the air pump 7 is connected to the connecting pipe 304 through a pipe.

[0043] The top end of the fixed pipe 309 penetrates through the air guide chamber 306 and extends into it. A shaft block 307 is fixedly installed at the center of the top of the air guide chamber 306. An impeller 303 is rotatably installed on the outer side of the shaft block 307. An inner sliding plate 308 is slidably installed on the outer side of the fixed pipe 309. The inner sliding plate 308 is located inside the air guide chamber 306. A top block 311 is fixedly installed on the top of the inner sliding plate 308. The top blocks 311 are evenly installed on the top of the inner sliding plate 308, and the top blocks 311 are aligned with the air guide chamber 306. The vents of 6 correspond one-to-one. During the discharge process, the rising gas drives the sewage flow, causing the impeller 303 to rotate. With the rapid discharge of gas, the diffusion range of gas is increased. At the same time, the discharged gas rises in the form of bubbles inside the sewage. During the rising process, the bubbles adsorb oil droplets or flocs and carry them to the water surface, so that the oil in the sewage is concentrated at the liquid surface. An elastic gasket 310 is fixedly installed between the bottom of the inner sliding plate 308 and the inner wall of the air guide chamber 306.

[0044] In use, the sewage inlet pipe is connected to the inlet pipe 4 and the outlet pipe 8 respectively. The sewage is introduced into the purification tank 1 through the inlet pipe 4. The sewage first passes through the grid plate 9 to filter out solid impurities. Then, the sewage with impurities removed is introduced between the air guiding mechanism 3 and the diversion mechanism 2. By starting the air pump 7, the air is pressurized and introduced into the air guiding mechanism 3. The air is then introduced into the sewage through the air guiding mechanism 3 and floats to the surface. During the floating process, the bubbles adsorb oil droplets or flocs and carry them to the surface. As the liquid level rises during the continuous sewage introduction process, the top layer of oil and the bottom layer of sewage are separated and discharged through the diversion mechanism 2.

[0045] During the process of sewage being introduced into the purification tank 1 through the inlet pipe 4, the inclination of the inlet pipe 4 causes the sewage to impact downwards during the introduction process, rushing towards the sludge collection tank 10, thus avoiding direct impact of the sewage on the grating plate 9. Subsequently, with the continuous introduction of sewage, the liquid level gradually rises, reaching the position of the grating plate 9. The grating grooves of the grating plate 9 block floating foreign objects in the sewage. As the liquid level gradually rises, the sewage is guided by the grating plate 9 and enters the position of the sludge guide tank 5, allowing the sewage on the top layer to carry floating impurities out through the sludge guide tank 5 for collection. The sewage passing through the grating plate 9 enters the interior of the tortuous plate 12. The tortuous plate 12 blocks the sewage passing through the grating plate 9, causing the sewage passing through the grating plate 9 to be blocked by the vertical surface of the tortuous plate 12 away from the top plate 13, and causing it to flow downwards, and be guided by the air guide mechanism 3 area at the bottom of the guide plate 11.

[0046] After the wastewater reaches the top of the air guiding mechanism 3, the air pumped by the air pump 7 is guided through the connecting pipe 304 to the diversion pipe 305. Then, the gas is guided through the fixed pipe 309 to the air guiding chamber 306, allowing air to enter above the inner sliding plate 308. At this time, the air holes of the air guiding chamber 306 are blocked by the top block 311, preventing the gas from escaping. As gas is continuously introduced, the air pressure at the top of the inner sliding plate 308 gradually increases, causing the inner sliding plate 308 to compress the elastic washer ring 310 under pressure, thus allowing the inner sliding plate 308 to... Inside the air guide chamber 306, the disc 308 drives the top block 311 to move downward, opening the air vent of the air guide chamber 306 and allowing the high-pressure gas inside to be quickly discharged through the air vent. At the same time, during the discharge process, the rising gas drives the sewage flow, causing the impeller 303 to rotate. In conjunction with the rapid discharge of the gas, the gas diffusion range is increased. Meanwhile, the discharged gas rises in the form of bubbles inside the sewage. During the rising process, the bubbles adsorb oil droplets or flocs and carry them to the surface, causing the oil in the sewage to concentrate at the liquid surface.

[0047] In the diversion mechanism 2, the passage of the top trough plate 21 provides a path for the gas to be discharged. When the sewage level is low, the sewage does not contact the side float 24 and cannot generate buoyancy to push the top trough plate 21 to move upward inside the purification tank 1. At this time, the bottom of the side sealing plate 22 contacts the inner wall of the purification tank 1, restricting the sewage flow to the side of the side sealing plate 22 near the outlet pipe 8. At the same time, the side pad 25 contacts the outside of the fixing frame 301, assisting the side sealing plate 22 in blocking the flow of sewage. As the liquid level rises, after contacting the side float 24, the side float 24 generates buoyancy, pushing the top trough plate 21 to move upward, opening the path for the oil at the liquid level to flow into the oil tank 6. At the same time, the side pad 25 disengages from the fixing frame 301, and the side sealing plate 22 opens the path for the bottom sewage to flow into the outlet pipe 8, allowing the bottom sewage to be discharged through the outlet pipe 8.

[0048] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0049] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A wastewater purification device for treating wastewater in a steel plant, characterized in that, include: Purification tank (1), one end of the purification tank (1) is fixedly installed with an inlet pipe (4), the other end of the purification tank (1) is fixedly installed with an outlet pipe (8), and an oil guide groove (6) and a slag guide groove (5) are fixedly installed on the top of the side of the purification tank (1) connected to the inlet pipe (4). An air guiding mechanism (3) is installed at the bottom of the inner wall of the purification tank (1). An air pump (7) is fixedly installed on the outside of the purification tank (1). The air outlet of the air pump (7) is connected to the air guiding mechanism (3) through a pipe. The diversion mechanism (2) is installed inside the purification tank (1), and the diversion mechanism (2) is located directly above the air guiding mechanism (3), and the diversion mechanism (2) corresponds to the oil guiding tank (6); A slag collection tank (10) is fixedly installed on the bottom of the inner wall of the purification tank (1) near the water inlet pipe (4). A grid plate (9) is fixedly installed on the top of the slag collection tank (10). The top of the grid plate (9) is inclined towards the water inlet pipe (4), and grid grooves are evenly opened on the outer side of the grid plate (9). A top plate (13) is fixedly installed on the top of the grid plate (9). A zigzag plate (12) is fixedly installed on the side of the top plate (13) away from the water inlet pipe (4). The end of the zigzag plate (12) away from the top plate (13) is bent vertically downward. A guide plate (11) is fixedly installed at the bottom of the zigzag plate (12). The end of the guide plate (11) away from the zigzag plate (12) is inclined downward towards the air guide mechanism (3). The diversion mechanism (2) includes a top groove plate (21), which is slidably installed inside the purification tank (1). The top groove plate (21) is positioned opposite to the oil guide groove (6), and the top groove plate (21) is located directly above the air guide mechanism (3). The top of the top groove plate (21) has a sloping groove at the center of the top, and the end of the sloping groove near the oil guide groove (6) is inclined downward. The sloping groove of the top groove plate (21) is uniformly provided with through grooves, and a side float (24) is fixedly installed at the bottom of the top groove plate (21). The side float (24) is symmetrically installed along the center of the axis of the top groove plate (21), and the side float (24) is a hollow structure. A side sealing plate (22) is fixedly installed on the side of the top trough plate (21) near the water outlet pipe (8). The side sealing plate (22) is located between the air guiding mechanism (3) and the water outlet pipe (8), and the bottom of the side sealing plate (22) is tightly fitted to the bottom of the inner wall of the purification tank (1). A slanted sealing plate (23) is fixedly installed on the side of the side sealing plate (22) near the air guiding mechanism (3). The end of the slanted sealing plate (23) away from the side sealing plate (22) is inclined downward towards the air guiding mechanism (3), and a side pad strip (25) is fixedly installed on the end of the slanted sealing plate (23) away from the side sealing plate (22). The air guiding mechanism (3) includes a fixing frame (301), which is fixed to the bottom of the inner wall of the purification tank (1) and is located directly below the top trough plate (21). The side of the fixing frame (301) near the water outlet pipe (8) is closely fitted with the outer side of the side pad (25).

2. The wastewater purification equipment for steel plant wastewater treatment according to claim 1, characterized in that: The top of the top plate (13) is flush with the top of the purification tank (1). The slag guide trough (5) is located between the top plate (13) and the water inlet pipe (4). The end of the water inlet pipe (4) near the purification tank (1) is installed at a downward angle.

3. The wastewater purification equipment for steel plant wastewater treatment according to claim 2, characterized in that: A circular groove plate (302) is fixedly installed on the top of the inner wall of the fixed frame (301).

4. The wastewater purification equipment for steel plant wastewater treatment according to claim 3, characterized in that: The top of the circular groove plate (302) is uniformly provided with circular grooves, and air guide chambers (306) are fixedly installed in the circular grooves of the circular groove plate (302). The top of the air guide chambers (306) is uniformly provided with air holes. The bottom of the air guide chambers (306) is fixedly installed with fixed pipes (309). The bottom of the fixed pipes (309) is fixedly installed with diverter pipes (305). One end of the diverter pipes (305) is fixedly installed with a connecting pipe (304). The end of the connecting pipes (304) away from the diverter pipes (305) passes through the fixed frame (301) and extends to the outside of the purification tank (1). The air outlet of the air pump (7) is connected to the connecting pipes (304) through a pipe.

5. The wastewater purification equipment for steel plant wastewater treatment according to claim 4, characterized in that: The top end of the fixed tube (309) passes through the air guide chamber (306) and extends into the interior. A shaft block (307) is fixedly installed at the center of the top of the air guide chamber (306). An impeller (303) is rotatably installed on the outside of the shaft block (307). An inner sliding plate (308) is slidably installed on the outside of the fixed tube (309). The inner sliding plate (308) is located inside the air guide chamber (306).

6. The wastewater purification equipment for steel plant wastewater treatment according to claim 5, characterized in that: A top block (311) is fixedly installed on the top of the inner slide (308). The top blocks (311) are evenly installed on the top of the inner slide (308), and the top blocks (311) correspond one-to-one with the air holes of the air chamber (306). An elastic gasket (310) is fixedly installed between the bottom of the inner slide (308) and the inner wall of the air chamber (306).

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