A kind of sewage purification equipment and purification method for preparing basic zinc carbonate

Abstract

The invention relates to the field of sewage purification, and in particular to a sewage purification device and a purification method for preparing sewage with basic zinc carbonate, comprising a neutralization tank, wherein a feeding assembly is arranged in the neutralization tank, comprising two screw rods arranged along the length direction of the neutralization tank, a chute is arranged at the bottom of the inner side wall in the length direction of the neutralization tank, a screw rod is rotatably connected in the chute, a rectangular frame is arranged between the two screw rods, a water tank for holding materials is arranged above the frame, a plurality of hollow vertical rods are arranged at the bottom of the water tank, a plurality of hollow branch pipes are arranged on each vertical rod, and drainage holes are arranged on the branch pipes; in the invention, materials are filled in the water tank and discharged from a plurality of branch pipes arranged up and down, and can quickly contact and mix with sewage at different heights in the neutralization tank, thereby improving the mixing effect, and at the same time, the movement of the frame promotes the flow of sewage, further accelerates the mixing of sewage and materials, and is conducive to the full progress of chemical reactions, thereby improving the rapid generation of sediments and improving the sewage purification efficiency.

Description

Technical Field

[0001] The invention relates to the field of sewage purification, and in particular to sewage purification equipment and a purification method for preparing sewage with basic zinc carbonate. Background Art

[0002] Basic zinc carbonate is an inorganic substance, mainly used in light astringents and latex products, skin protectants, rayon production, desulfurizers, analytical reagents, pharmaceutical industry and feed additives; the current production and preparation of basic zinc carbonate will generate some waste, such as sewage, waste gas and waste residue; the sewage contains impurities such as heavy metal ions, organic precipitants and organic chelating agents. Before being discharged into the natural environment, the sewage needs to be purified, mainly to prevent the heavy metals in the sewage from polluting water and land resources.

[0003] At present, the method for purifying wastewater generated by the preparation process of basic zinc carbonate is generally to transfer the wastewater to a neutralization tank, and then add alkaline substances such as lime (CaO) or sodium hydroxide (NaOH). These substances will react with the acidic components in the wastewater to neutralize the heavy metal ions (such as zinc, iron, etc.) in the wastewater and react with hydroxide ions (OH-) to form insoluble hydroxide precipitates. The wastewater and the precipitate are then separated to achieve wastewater purification.

[0004] When adding alkaline substances such as lime (CaO) or sodium hydroxide (NaOH), a quantitative proportion of alkaline substances is generally added into the neutralization tank at one time and then stirred. This one-time addition will affect the mixing degree of the alkaline substances and sewage, resulting in only a part of the sewage being able to chemically react with the alkaline substances to produce precipitates. Especially when the volume of the neutralization tank is large, the mixing degree is worse, the mixing degree of the alkaline substances and sewage is low, the purification effect is also not ideal, and it is difficult to achieve the expected purification effect.

[0005] Therefore, in view of the above problems, a wastewater purification device and a purification method for preparing basic zinc carbonate are proposed. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve the technical problem is as follows: the sewage purification equipment for preparing basic zinc carbonate of the present invention comprises a neutralization tank, wherein a feeding assembly is provided in the neutralization tank, and the feeding assembly is used to uniformly feed the material for purifying sewage into the neutralization tank; The feeding assembly includes two screw rods arranged along the length direction of the neutralization tank, a chute is provided at the bottom of the inner side wall in the length direction of the neutralization tank, a screw rod is rotatably connected in the chute, a rectangular frame is provided between the two screw rods, a water tank for holding materials is provided above the frame, a plurality of hollow vertical rods are provided at the bottom of the water tank, a plurality of hollow branch pipes are provided on each vertical rod, and a discharge hole is provided on the branch pipe; A pressure pump is provided on the upper surface of the water tank, and the pressure pump is used to increase the pressure in the water tank.

[0008] Preferably, a rotating drum is provided at the upper end of each vertical rod, the rotating drum is sealed and rotatably connected to the bottom of the water tank, a sprocket is provided on the outer ring of the rotating drum, a chain is sleeved between the multiple rotating drums, a gear is fixed to the lower end of one of the rotating drums close to the side wall of the neutralization tank, the gear is meshed with a rack, and the rack is arranged on the side wall of the neutralization tank; A plurality of supporting plates are arranged at the bottom of the frame, the supporting plates are arranged opposite to the lower ends of the vertical rods one by one, and the lower ends of the vertical rods are rotatably connected to the supporting plates.

[0009] Preferably, a plurality of blades are provided on the upper end surface of each rotating drum, and the blades are used to stir the materials in the water tank.

[0010] Preferably, scraper assemblies are provided on both sides of the bottom of the frame, which are used to clean the sediment at the bottom of the neutralization tank. The scraper assembly includes a scraper, one edge of which is rotatably connected to the frame through a torsion spring, and the other edge of the scraper extends to the bottom of the neutralization tank, and the two scrapers are arranged in an "eight" shape.

[0011] Preferably, the scraper includes a base plate and a scraping part, an edge of the base plate is rotatably connected to the frame through a torsion spring, an edge of the base plate is provided with a row of springs, the ends of the springs are fixedly connected to the scraping part, and the edge of the scraping part extends to the bottom of the neutralization tank.

[0012] Preferably, a cleaning assembly is provided on the scraper and the frame, and the cleaning assembly is used to clean the neutralization tank. The cleaning assembly includes water supply pipes horizontally mounted on both sides of the top of the frame, each water supply pipe is connected to a plurality of drainage pipes, and the ends of the drainage pipes extend to a hollow scraping portion, and a plurality of water spray holes are provided on the edge of the scraping portion.

[0013] Preferably, a plurality of water spray holes are arranged on the inclined upper surface of the edge of the scraping portion, a plurality of water spray holes are arranged on the tip of the edge of the scraping portion, and a plurality of water spray holes are arranged on the lower surface of the edge of the scraping portion.

[0014] Preferably, sewage outlets are provided on both sides of the bottom of the neutralization tank, and the sewage outlets are arranged along the width direction of the neutralization tank. A clearance groove is provided on the inner bottom surface of the sewage outlet, and a sealing plate is provided in the clearance groove. The upper edge of the sealing plate is rotatably connected to a screw rod, and the screw rod penetrates upward to the top position of the neutralization tank.

[0015] A method for purifying wastewater produced by the production of basic zinc carbonate, the method comprising the above-mentioned wastewater purification equipment, and the method comprising the following steps: Step 1: Wastewater collection and initial treatment Wastewater collection: The wastewater generated during the production of basic zinc carbonate is collected and put into the regulating tank for preliminary water quantity and quality regulation to ensure the stability of the subsequent treatment process; Removal of large particles: Remove large particles of impurities from sewage through grilles or screens to prevent them from clogging or damaging subsequent treatment equipment; Step 2: pH adjustment Adding alkaline substances: introducing sewage into the neutralization tank, and then feeding sodium hydroxide material into the neutralization tank through the feeding component; Stirring and reaction: While feeding, the feeding component stirs the sewage and the sodium hydroxide material, so that the sodium hydroxide material is evenly distributed in the sewage to ensure sufficient reaction; pH value monitoring and adjustment: During the reaction process, the pH value of the sewage will gradually increase. Use a pH meter to monitor the pH value of the sewage in real time, and increase or decrease the amount of alkaline substances as needed to adjust the pH value to 8.5-9.0; Step 3: Precipitation reaction Standing sedimentation: standing for a period of time to allow the generated hydroxide precipitate to settle to the bottom of the neutralization tank under the action of gravity; Step 4: Solid-liquid separation and sludge treatment The purified sewage on the upper layer is pumped out, and then the sediment at the bottom of the neutralization tank is cleaned using a scraping assembly.

[0016] Preferably, in step 4, after the sludge is cleaned out of the neutralization tank, a suitable disposal method is selected according to the properties of the sludge and local environmental protection requirements to prevent secondary pollution caused by heavy metals in the sludge.

[0017] The present invention is beneficial in that: 1. In the present invention, the material is filled in the water tank and discharged from a plurality of vertically arranged branch pipes, so that it can quickly contact and mix with the sewage at different heights in the neutralization tank, thereby improving the mixing effect. At the same time, the movement of the frame promotes the flow of sewage, further accelerates the mixing of sewage and materials, and helps to fully carry out the chemical reaction, thereby improving the rapid generation of sediments and improving the sewage purification efficiency.

[0018] 2. In the present invention, the clean water discharged from the water spray hole flushes the residual sediment, thereby improving the sediment cleaning effect, and the sediment pushed to both sides of the neutralization tank has a certain fluidity due to the mixing of the clean water. The sediment can be extracted by a sludge pump to prevent the sediment from covering the bottom surface of the neutralization tank in the reflux. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A three-dimensional diagram of a sewage purification device for preparing basic zinc carbonate in the present invention; Figure 2 It is a top view of the sewage purification equipment for preparing basic zinc carbonate in the present invention; Figure 3 It is a side view of the sewage purification equipment for preparing basic zinc carbonate in the present invention; Figure 4 It is a three-dimensional diagram of the neutralization tank in the present invention; Figure 5 It is a three-dimensional diagram of the coordination between the feeding assembly and the scraping assembly in the present invention; Figure 6 is a three-dimensional diagram of the frame of the present invention; Figure 7 It is a structural schematic diagram of the scraper in the present invention; Figure 8 It is a three-dimensional diagram of the feeding assembly in the present invention; Fig. 9 It is a three-dimensional diagram of the vertical rod in the present invention; Fig.10 The present invention is a flow chart of the method for preparing sewage purification using basic zinc carbonate.

[0020] In the figure: 1. neutralization tank; 2. screw rod; 3. slide; 4. frame; 5. water tank; 6. vertical rod; 7. branch pipe; 8. pressure pump; 9. drum; 10. chain; 11. gear; 12. rack; 13. support plate; 14. blade; 15. scraper; 16. base plate; 17. scraping part; 18. spring; 19. water supply pipe; 20. drainage pipe; 21. water spray hole; 22. sewage outlet; 23. clearance groove; 24. sealing plate; 25. screw rod; 26. horizontal pipe. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0022] Reference Figure 1 - Fig. 9, a sewage purification device for preparing basic zinc carbonate, comprising a neutralization tank 1, wherein a feeding assembly is arranged in the neutralization tank 1, and the feeding assembly is used to uniformly feed the material for purifying sewage into the neutralization tank 1; the feeding assembly comprises two screw rods 2 arranged along the length direction of the neutralization tank 1, a chute 3 is arranged at the bottom of the inner side wall in the length direction of the neutralization tank 1, the screw rod 2 is rotatably connected in the chute 3, a rectangular frame 4 is arranged between the two screw rods 2, a water tank 5 for holding materials is arranged above the frame 4, a plurality of hollow vertical rods 6 are arranged at the bottom of the water tank 5, a plurality of hollow branch pipes 7 are arranged on each vertical rod 6, and a discharge hole is arranged on the branch pipe 7; a pressure pump 8 is arranged on the upper surface of the water tank 5, and the pressure pump 8 is used to pressurize the water tank 5; in this embodiment, the feeding assembly is used to uniformly feed the material for purifying sewage into the neutralization tank 1, and the material is an alkali such as lime (CaO) or sodium hydroxide (NaOH) The solution of the volatile substance is prepared in advance, and then the material is injected from the filling port of the water tank 5, the filling port of the water tank 5 is closed, and then the pressure pump 8 on the water tank 5 is started to increase the pressure in the water tank 5; the end of the screw rod 2 is connected to a motor that rotates alternately in forward and reverse directions, and the motor drives the screw rod 2 to rotate, and the screw rod 2 can push or pull the frame 4 to move along the length direction of the neutralization tank 1. During the movement, the material in the water tank 5 is subjected to the pressure and flows along the vertical rod 6, and finally discharged from the branch pipe 7, and the branch pipe 7 on the vertical rod 6 is arranged along the height direction of the neutralization tank 1. Therefore, when the material is discharged from the branch pipe 7, the material can be evenly dispersed inside the sewage. At the same time, the screw rod 2 drives the frame 4 to move, and the frame 4, the vertical rod 6 and the branch pipe 7 will push the sewage to play a stirring role, so that the material can quickly react chemically with the sewage to increase the formation of sediment; The material is filled in the water tank 5 and discharged from multiple vertically arranged branch pipes 7, which can quickly contact and mix with the sewage at different heights in the neutralization tank 1 to improve the mixing effect. At the same time, the movement of the frame 4 promotes the flow of sewage, further accelerates the mixing of sewage and materials, and helps to fully carry out the chemical reaction, thereby increasing the rapid generation of sediment and improving the sewage purification efficiency.

[0023] Reference Figure 1 - Fig. 9 , a rotating drum 9 is provided at the upper end of each vertical rod 6, and the rotating drum 9 is sealed and rotatably connected to the bottom of the water tank 5, a sprocket is provided on the outer ring of the rotating drum 9, and a chain 10 is sleeved between the plurality of rotating drums 9, and a gear 11 is fixedly connected to the lower end of one of the rotating drums 9 close to the side wall of the neutralization tank 1, and the gear 11 is meshed with a rack 12, and the rack 12 is arranged on the side wall of the neutralization tank 1; A plurality of support plates 13 are provided at the bottom of the frame 4, and the support plates 13 are arranged opposite to the lower ends of the vertical rods 6 one by one, and the lower ends of the vertical rods 6 are rotatably connected to the support plates 13; the lower ends of the vertical rods 6 are rotatably connected to the support plates 13, which can improve the stability of the rotation of the vertical rods 6; A rack 12 is provided on the upper edge of one side wall of the neutralization tank 1, and the rack 12 can mesh with the gear 11. When the frame 4 moves along the length direction of the neutralization tank 1, the gear 11 meshes with the rack 12, and the rack 12 rubs the gear 11 to rotate. The gear 11 drives the sprocket to which it is fixed, and the sprocket drives the remaining sprockets to rotate through the chain 10. The rotation of the sprocket will drive the vertical rod 6 to which it is fixed to rotate, and the vertical rod 6 will drive the branch pipe 7 to rotate at the same time. The rotation of the branch pipe 7 will stir the sewage, thereby accelerating the mixing of the sewage and the material, further promoting the chemical reaction, and improving the sewage purification efficiency.

[0024] Reference Figure 8 - Fig. 9 , each drum 9 is provided with a plurality of blades 14 on its upper end surface, and the blades 14 are used to stir the material in the water tank 5; Taking into account the materials configured in the water tank 5, there is sedimentation, that is, the effective purification substances in the materials will precipitate and fall to the bottom of the water tank 5, resulting in the effective purification substances in the materials cannot be evenly discharged into the neutralization tank 1. At the same time, the sediment in the water tank 5 may block the vertical rod 6 or the branch pipe 7. For this reason, a rotating drum 9 is arranged at the upper end of the sprocket. The rotating drum 9 is sealed and rotatably connected to the bottom of the water tank 5. At the same time, the upper end surface of the rotating drum 9 is provided with blades 14, which can stir the material in the water tank 5, stir and tumble the material in real time, and avoid sedimentation of the material.

[0025] Reference Figure 1 - Figure 7 , scraper assemblies are provided on both sides of the bottom of the frame 4, and the scraper assemblies are used to clean the sediment at the bottom of the neutralization tank 1, and the scraper assembly includes a scraper 15, one edge of the scraper 15 is rotatably connected to the frame 4 through a torsion spring, and the torsion spring can make the edge of the scraper 15 tightly attached to the bottom surface of the neutralization tank 1, effectively contacting the sediment on the bottom surface of the neutralization tank 1, and the other edge of the scraper 15 extends to the bottom of the neutralization tank 1, and the two scrapers 15 are arranged in an "eight" shape; When the material is put into the tank, the frame 4 moves back and forth several times, and then moves to one side of the neutralization tank 1, waiting for the sewage and the material to complete the chemical reaction. After the sedimentation is completed, the purified sewage in the neutralization tank 1 can be pumped out by a water pump. As for the sediment, it will settle at the bottom of the neutralization tank 1. At this time, the sediment needs to be taken out. In this embodiment, a scraper assembly is arranged at the bottom of the frame 4. The scraper assembly can scrape the sediment to both sides of the neutralization tank 1, and the sediment is concentrated and stacked together to facilitate the subsequent removal of the sediment. The specific operation of the scraper assembly is that the scraper 15 is attached to the bottom surface of the neutralization tank 1, and the scraper 15 moves back and forth with the frame 4, so as to push the sediment on the bottom surface of the neutralization tank 1 to both sides of the neutralization tank 1.

[0026] Reference Figure 1 - Figure 7The scraper 15 includes a base plate 16 and a scraping portion 17. One edge of the base plate 16 is rotatably connected to the frame 4 through a torsion spring. One edge of the base plate 16 is provided with a row of springs 18. The end of the spring 18 is fixedly connected to the scraping portion 17. The edge of the scraping portion 17 extends to the bottom of the neutralization tank 1. Considering that there are some foreign matter in the sewage, the foreign matter may settle to the bottom surface of the neutralization tank 1. When the scraper 15 scrapes the sediment, the edge of the scraper 15 will squeeze onto the foreign matter, which may easily cause damage to the edge of the scraper 15 or damage to the feeding assembly. For this reason, the scraper 15 is divided into two parts, namely, a scraping part 17 and a base plate 16, and the scraping part 17 is connected to the base plate 16 through a plurality of springs 18. When the scraping part 17 is squeezed onto the foreign matter, the elasticity of the spring 18 enables the scraper 15 to pass over the foreign matter, thereby reducing damage to the scraper 15 and extending the service life of the scraper 15.

[0027] Reference Figure 1 - Figure 7 A cleaning assembly is provided on the scraper 15 and the frame 4, and the cleaning assembly is used to clean the neutralization tank 1, and the cleaning assembly includes water supply pipes 19 horizontally mounted on both sides of the top of the frame 4, each water supply pipe 19 is connected to a plurality of drainage pipes 20, and the ends of the drainage pipes 20 extend to the hollow scraping portion 17, and the edge of the scraping portion 17 is provided with a plurality of water spray holes 21; It is difficult to scrape the sediment clean by scraping with the scraper 15. In this embodiment, the sediment is thoroughly cleaned with the flushing of clean water. The water supply pipe 19 is connected to an external water pump. The water pump injects clean water into the water supply pipe 19, and then diverts it to each drainage pipe 20. After that, it is discharged from the water spray hole 21 on the scraping part 17. The scraper 15 scrapes the sediment while the clean water discharged from the water spray hole 21 flushes the remaining sediment to improve the sediment cleaning effect. The sediment pushed to both sides of the neutralization tank 1 has a certain fluidity due to the mixing of clean water at this time. The sediment can be extracted by the sludge pump to prevent the sediment from covering the bottom surface of the neutralization tank 1 in the reflux; In order to improve the overall cleanliness of the interior of the neutralization tank 1, multiple transverse pipes 26 can also be opened on the drainage pipes 20 on both sides of the frame 4. The water discharged from the transverse pipes 26 can flush the side walls of the neutralization tank 1 and the chute 3 to thoroughly clean the neutralization tank 1.

[0028] Reference Figure 1 - Figure 7 A plurality of water spray holes 21 are arranged on the inclined upper surface of the edge of the scraping portion 17, a plurality of water spray holes 21 are arranged on the tip of the edge of the scraping portion 17, and a plurality of water spray holes 21 are arranged on the lower surface of the edge of the scraping portion 17; The water spraying direction of the water spraying hole 21 on the scraping part 17 is as shown in the figure. The water spraying hole 21 arranged on the inclined upper surface of the edge of the scraping part 17 can spray out clean water to wash away the sediment spread to the inclined upper surface of the edge of the scraping part 17, so as to prevent the sediment from spreading to the scraping part 17 and adhering to it; the water spraying hole 21 arranged on the tip of the edge of the scraping part 17 can spray out clean water to wash the sediment in front of the scraping part 17, so that the sediment in front is mixed with the clean water and has a certain fluidity, which is convenient for the scraping part 17 to push the sediment; the water spraying hole 21 arranged on the lower surface of the edge of the scraping part 17 can spray out clean water to wash the sediment scraped by the scraping part 17, thereby improving the cleaning effect of the bottom surface of the neutralization tank 1, and at the same time, the residual sediment is washed to the front of the scraping part 17, and the cleaning is more thorough.

[0029] Reference Figure 1 - Figure 4 , sewage outlets 22 are provided on both sides of the bottom of the neutralization tank 1, and the sewage outlets 22 are arranged along the width direction of the neutralization tank 1. A clearance groove 23 is provided on the bottom surface of the sewage outlet 22, and a sealing plate 24 is provided in the clearance groove 23. The upper edge of the sealing plate 24 is rotatably connected to a screw 25, and the screw 25 penetrates upward to the top position of the neutralization tank 1; The sewage outlet 22 is provided to directly discharge the purified sewage. Specifically, the sewage is poured into the neutralization tank 1, and after the sewage purification is completed, the sewage outlet 22 is always blocked by the sealing plate 24. When the purified sewage needs to be discharged, the screw 25 is rotated, the screw 25 moves downward, and the sealing plate 24 is pushed downward. At this time, the upper edge of the sewage outlet 22 is gradually opened, and the purified sewage flows out from the sewage outlet 22. In order to prevent the purified sewage from taking away the sediment, the sewage outlet 22 can be partially opened to reduce the flow speed and flow of the sewage and reduce the scouring of the sediment. When the purified sewage is discharged, the sewage outlet 22 is fully opened. At this time, the scraper assembly is driven. Each time the scraper assembly moves to the sewage outlet 22, the scraped sediment can be pushed away from the sewage outlet 22. The cleaning operation is more convenient, the cleaning effect is more significant, and the cleaning efficiency is higher.

[0030] Reference Fig.10 A method for purifying wastewater produced by the preparation of basic zinc carbonate, the method comprising the above-mentioned wastewater purification equipment, and the method comprising the following steps: Step 1: Wastewater collection and initial treatment Wastewater collection: The wastewater generated during the production of basic zinc carbonate is collected and put into the regulating tank for preliminary water quantity and quality regulation to ensure the stability of the subsequent treatment process; Removal of large particles: Remove large particles of impurities from sewage through grilles or screens to prevent them from clogging or damaging subsequent treatment equipment; Step 2: pH adjustment Adding alkaline substances: introducing sewage into the neutralization tank 1, and then feeding sodium hydroxide material into the neutralization tank 1 through the feeding component; Stirring and reaction: While feeding, the feeding component stirs the sewage and the sodium hydroxide material, so that the sodium hydroxide material is evenly distributed in the sewage to ensure sufficient reaction; pH value monitoring and adjustment: During the reaction process, the pH value of the sewage will gradually increase. Use a pH meter to monitor the pH value of the sewage in real time, and increase or decrease the amount of alkaline substances as needed to adjust the pH value to 8.5-9.0; Step 3: Precipitation reaction Standing and settling: standing for a period of time to allow the generated hydroxide precipitate to settle to the bottom of the neutralization tank 1 under the action of gravity; Step 4: Solid-liquid separation and sludge treatment The purified sewage on the upper layer is pumped out, and then the sediment at the bottom of the neutralization tank 1 is cleaned using a scraping assembly.

[0031] In step 4, after the sludge is cleaned out of the neutralization tank 1, a suitable disposal method is selected according to the nature of the sludge and local environmental protection requirements, such as safe landfill, incineration or resource utilization. For sludge containing heavy metals, stabilization / solidification treatment is required to prevent secondary pollution of heavy metals.

[0032] Working principle: In this embodiment, the feeding assembly is used to uniformly feed the material for purifying sewage into the neutralization tank 1, and the material is a solution of alkaline substances such as lime (CaO) or sodium hydroxide (NaOH), and the material is pre-configured, and then injected through the filling port of the water tank 5, the filling port of the water tank 5 is closed, and then the pressure pump 8 on the water tank 5 is driven to increase the pressure in the water tank 5; The end of the screw rod 2 is connected to a motor that rotates alternately in forward and reverse directions. The motor drives the screw rod 2 to rotate, and the screw rod 2 can push or pull the frame 4 to move along the length direction of the neutralization tank 1. During the movement, the material in the water tank 5 is subjected to pressure and flows along the vertical rod 6, and finally discharged from the branch pipe 7. The branch pipe 7 on the vertical rod 6 is arranged along the height direction of the neutralization tank 1. Therefore, when the material is discharged from the branch pipe 7, the material can be evenly dispersed inside the sewage. At the same time, the screw rod 2 drives the frame 4 to move, and the frame 4, the vertical rod 6 and the branch pipe 7 will push the sewage to play a stirring role, so that the material can quickly react chemically with the sewage to improve the formation of sediment; When the material is put into the tank, the frame 4 moves back and forth several times, and then moves to one side of the neutralization tank 1, waiting for the sewage and the material to complete the chemical reaction. After the sedimentation is completed, the purified sewage in the neutralization tank 1 can be pumped out by a water pump. As for the sediment, it will settle at the bottom of the neutralization tank 1. At this time, the sediment needs to be taken out. In this embodiment, a scraper assembly is arranged at the bottom of the frame 4. The scraper assembly can scrape the sediment to both sides of the neutralization tank 1, and the sediment is concentrated and stacked together to facilitate the subsequent removal of the sediment. The specific operation of the scraper assembly is that the scraper 15 is attached to the bottom surface of the neutralization tank 1, and the scraper 15 moves back and forth with the frame 4, so as to push the sediment on the bottom surface of the neutralization tank 1 to both sides of the neutralization tank 1.

[0033] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A sewage purification device for preparing basic zinc carbonate, characterized in that: It includes a neutralization tank, in which a feeding assembly is provided, and the feeding assembly is used to evenly feed the material for purifying sewage into the neutralization tank; The feeding assembly includes two screw rods arranged along the length direction of the neutralization tank, a chute is provided at the bottom of the inner side wall in the length direction of the neutralization tank, a screw rod is rotatably connected in the chute, a rectangular frame is provided between the two screw rods, a water tank for holding materials is provided above the frame, a plurality of hollow vertical rods are provided at the bottom of the water tank, a plurality of hollow branch pipes are provided on each vertical rod, and a discharge hole is provided on the branch pipe; A pressure pump is provided on the upper surface of the water tank, and the pressure pump is used to increase the pressure in the water tank.

2. A sewage purification equipment for preparing basic zinc carbonate according to claim 1, characterized in that: A rotating drum is provided at the upper end of each vertical rod, and the rotating drum is sealed and rotatably connected to the bottom of the water tank. A sprocket is provided on the outer ring of the rotating drum, and a chain is sleeved between the rotating drums. A gear is fixed to the lower end of one rotating drum close to the side wall of the neutralization tank, and the gear is meshed with a rack, which is arranged on the side wall of the neutralization tank. A plurality of supporting plates are arranged at the bottom of the frame, the supporting plates are arranged opposite to the lower ends of the vertical rods one by one, and the lower ends of the vertical rods are rotatably connected to the supporting plates.

3. A sewage purification equipment for preparing basic zinc carbonate according to claim 2, characterized in that: A plurality of blades are arranged on the upper end surface of each rotating drum, and the blades are used to stir the materials in the water tank.

4. A sewage purification equipment for preparing basic zinc carbonate according to claim 1, characterized in that: Scraper assemblies are provided on both sides of the bottom of the frame, which are used to clean the sediment at the bottom of the neutralization tank. The scraper assembly includes a scraper, one edge of which is rotatably connected to the frame through a torsion spring, and the other edge of the scraper extends to the bottom of the neutralization tank, and the two scrapers are arranged in an "eight" shape.

5. A sewage purification equipment for preparing basic zinc carbonate according to claim 4, characterized in that: The scraper includes a base plate and a scraping part. One edge of the base plate is rotatably connected to the frame through a torsion spring. One edge of the base plate is provided with a row of springs. The ends of the springs are fixedly connected to the scraping part. The edge of the scraping part extends to the bottom of the neutralization tank.

6. A sewage purification equipment for preparing basic zinc carbonate according to claim 5, characterized in that: A cleaning assembly is provided on the scraper and the frame, and the cleaning assembly is used to clean the neutralization tank. The cleaning assembly includes water supply pipes horizontally mounted on both sides of the top of the frame, each water supply pipe is connected to a plurality of drainage pipes, and the ends of the drainage pipes extend to a hollow scraping part, and a plurality of water spray holes are opened on the edge of the scraping part.

7. A sewage purification equipment for preparing basic zinc carbonate according to claim 6, characterized in that: A plurality of water spray holes are arranged on the inclined upper surface of the edge of the scraping part, a plurality of water spray holes are arranged on the tip of the edge of the scraping part, and a plurality of water spray holes are arranged on the lower surface of the edge of the scraping part.

8. A sewage purification equipment for preparing basic zinc carbonate according to claim 6, characterized in that: Sewage outlets are opened on both sides of the bottom of the neutralization tank, and the sewage outlets are set along the width direction of the neutralization tank. A clearance groove is opened on the bottom surface of the sewage outlet, and a sealing plate is arranged in the clearance groove. The upper edge of the sealing plate is rotatably connected with a screw rod, and the screw rod penetrates upward to the top position of the neutralization tank.

9. A method for purifying wastewater produced by the production of basic zinc carbonate, comprising any one of the wastewater purification equipment for the production of basic zinc carbonate according to claims 1 to 8, characterized in that: The method for purifying wastewater prepared by basic zinc carbonate comprises the following steps: Step 1: Wastewater collection and initial treatment Wastewater collection: The wastewater generated during the production of basic zinc carbonate is collected and put into the regulating tank for preliminary water quantity and quality regulation to ensure the stability of the subsequent treatment process; Removal of large particles: Remove large particles of impurities from sewage through grilles or screens to prevent them from clogging or damaging subsequent treatment equipment; Step 2: pH adjustment Adding alkaline substances: introducing sewage into the neutralization tank, and then feeding sodium hydroxide material into the neutralization tank through the feeding component; Stirring and reaction: While feeding, the feeding component stirs the sewage and the sodium hydroxide material, so that the sodium hydroxide material is evenly distributed in the sewage to ensure full reaction; pH value monitoring and adjustment: During the reaction process, the pH value of the sewage will gradually increase. Use a pH meter to monitor the pH value of the sewage in real time, and increase or decrease the amount of alkaline substances as needed to adjust the pH value to 8.5-9.0; Step 3: Precipitation reaction Standing sedimentation: standing for a period of time to allow the generated hydroxide precipitate to settle to the bottom of the neutralization tank under the action of gravity; Step 4: Solid-liquid separation and sludge treatment The purified sewage on the upper layer is pumped out, and then the sediment at the bottom of the neutralization tank is cleaned using a scraping assembly.

10. A method for purifying wastewater produced by preparing basic zinc carbonate according to claim 9, characterized in that: In step 4, after the sludge is cleaned out of the neutralization tank, an appropriate disposal method is selected based on the nature of the sludge and local environmental protection requirements to prevent secondary pollution caused by heavy metals in the sludge.

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