Material recovery device after wastewater treatment

Abstract

The invention belongs to the technical field of wastewater treatment devices, and particularly relates to a material recovery device after wastewater treatment. According to the technical scheme, the material recycling device after wastewater treatment comprises a collecting barrel, a spiral collecting groove is formed in the inner wall of the collecting barrel, a material negative pressure recycling unit is arranged at the bottom of the collecting barrel, a treated wastewater collecting unit is connected to the upper portion of the collecting barrel, and a centrifugal stirring unit is installed in the collecting barrel; the top of the collecting cylinder is connected with a waste gas collecting cover, and a probe unit is installed in the waste gas collecting cover. The invention provides a material recovery device after wastewater treatment.

Description

Technical Field

[0001] The invention belongs to the technical field of wastewater treatment devices, and in particular relates to a material recovery device after wastewater treatment. Background Art

[0002] The process and device of electrocatalytically enhanced zero-valent iron sulfide for removing refractory organic matter from high-fluorine and high-salt wastewater is mainly dedicated to solving the key technical bottlenecks in the field of deep treatment of industrial wastewater. In the wastewater produced by industries such as semiconductors, petrochemicals and pesticides, there are generally characteristics of fluoride ion concentrations of 500-2000 mg / L, conductivity of 20-50 mS / cm, COD concentrations of 1000-5000 mg / L, BOD concentrations of 500-1000 mg / L, and SS concentrations of 800-1000 mg / L. Such complex water quality conditions severely restrict the application of traditional treatment processes.

[0003] At present, mainstream technologies face many difficulties in treating this type of wastewater. Although the chemical precipitation method is easy to operate, it is not ideal for removing difficult-to-degrade organic matter, and it will produce a large amount of chemical sludge that requires secondary treatment. The traditional Fenton oxidation process requires the continuous addition of a large amount of hydrogen peroxide, which not only has high operating costs, but also significantly reduces the oxidation efficiency in a high-salt environment. The biological treatment process encounters dual inhibition from high salt and high fluoride ions, making it difficult to maintain microbial activity. Membrane separation technology requires frequent cleaning and replacement due to membrane fouling and scaling problems, resulting in excessively high operating and maintenance costs.

[0004] The closest zero-valent iron sulfide / hydrogen peroxide treatment system, although it improves the stability of zero-valent iron through sulfide modification, still fails to completely solve the problem of material deactivation under high-salt conditions, and the continuous increase in hydrogen peroxide greatly increases the operating cost. The technology is also relatively limited in its effect on the removal of fluoride ions and cannot meet the strict emission standards. At the same time, the control accuracy of the reaction process is insufficient, making it difficult to adapt to the fluctuations in the quality of the influent water.

[0005] Most existing technologies use simple absorption or adsorption to treat waste gas, which not only has unsatisfactory treatment effects, but also fails to recycle valuable components in waste gas, resulting in a waste of resources. Especially when treating chlorine-containing waste gas, traditional technologies often use alkaline solution absorption, which not only poses a safety hazard, but also increases the burden of wastewater treatment. Summary of the invention

[0006] In order to solve the above problems existing in the prior art, the object of the present invention is to provide a material recovery device after wastewater treatment.

[0007] The technical solution adopted by the present invention is:

[0008] A material recovery device after wastewater treatment comprises a collecting cylinder, a spiral collecting groove is arranged on the inner wall of the collecting cylinder, a material negative pressure recovery unit is arranged at the bottom of the collecting cylinder, the upper part of the collecting cylinder is connected to the treated wastewater collection unit, and a centrifugal stirring unit is installed in the collecting cylinder; the top of the collecting cylinder is connected to the exhaust gas collection cover, and a probe unit is installed in the exhaust gas collection cover.

[0009] The centrifugal stirring unit of the present invention generates centrifugal force in the treated wastewater, and the nano S-ZVI material is thrown into the spiral collecting trough under the action of the centrifugal force, and then slides along the spiral collecting trough to the edge of the bottom of the collecting cylinder, and is sucked away by the material negative pressure recovery unit, so that the nano S-ZVI material is collected and reused. The wastewater after the nano S-ZVI material is centrifugally separated is collected from the upper part of the collecting cylinder by the treated wastewater collection unit. The waste gas is collected by the waste gas collection cover and sent to the downstream waste gas treatment device for treatment. The present invention can recycle the nano S-ZVI material, wastewater and waste gas respectively, and can reduce the cost of wastewater treatment through resource utilization.

[0010] As a preferred embodiment of the present invention, the material negative pressure recovery unit includes a material recovery collection pipe, which is arranged at the bottom of the collection cylinder, is annular in shape, is connected to a negative pressure device, is connected to a material discharge pipe, and the other end of the material discharge pipe extends out of the collection cylinder. After the negative pressure device is started, the nano S-ZVI material sliding down from the spiral collection trough is sucked into the material recovery collection pipe and collected through the material discharge pipe.

[0011] As a preferred embodiment of the present invention, the treated wastewater collection unit includes a treated wastewater collection annular tube, which is sleeved outside the collection cylinder, and is connected to a plurality of treated wastewater collection tubes, which extend from the upper part of the collection cylinder. After centrifugal separation, the sewage in the upper part contains less nano-S-ZVI material. The wastewater enters the treated wastewater collection annular tube through the plurality of treated wastewater collection tubes to achieve wastewater collection.

[0012] As a preferred embodiment of the present invention, the centrifugal stirring unit includes a support rod, the support rod is connected to the collection cylinder, a transmission rod is installed on the support rod, and a wastewater agitator is connected to the transmission rod. The transmission rod drives the wastewater agitator to rotate, so that the wastewater generates centrifugal force, so that the nano S-ZVI material is centrifuged into the spiral collection tank.

[0013] As a preferred embodiment of the present invention, the transmission rod is connected to the support rod through a lifting mechanism, a drain port is provided at the bottom of the collection cylinder, and a drain port plug is connected to the bottom of the wastewater agitator. The lifting mechanism can drive the transmission rod, the wastewater agitator and the drain port plug to rise and fall as a whole, so that the drain port plug blocks the drain port. When the 360° probe is working, the wastewater agitator stops stirring, and the drain port plug moves down to the drain port for blocking.

[0014] As a preferred solution of the present invention, the probe unit includes a probe lifting rod, which is installed in the exhaust gas collection cover, and the lower end of the probe lifting rod is connected to a 360° probe. The 360° probe is used to identify whether there is nano S-ZVI material in the spiral collection tank. When the 360° probe is working, the drain outlet plug blocks the drain outlet.

[0015] As a preferred solution of the present invention, the 360° probe is provided with a high-pressure water nozzle, and the water source of the high-pressure water nozzle comes from treated wastewater.

[0016] As a preferred embodiment of the present invention, the top of the waste gas collection hood is connected to a waste gas collection pipeline, and the other end of the waste gas collection pipeline is connected to a chlorine treatment and recycling device. The chlorine treatment and recycling device uses a water ring vacuum pump to create a negative pressure environment, and uses circulating cooling water (5-10°C) as an absorption medium. Since the solubility of chlorine is much higher than that of other gases, chlorine can be selectively enriched at this stage. The enriched chlorine-containing solution is connected to a sodium hypochlorite generator after precision filtration to convert the recovered chlorine into a sodium hypochlorite product with higher market value. The effective chlorine content of the product can reach 10-12%, and the conversion rate can reach more than 85%.

[0017] As a preferred embodiment of the present invention, the chlorine treatment and recycling device is connected to other waste gas treatment devices through pipelines. The other waste gas treatment devices are used to treat other waste gases such as VOCs. The other waste gas treatment devices use a new porous titanium-based catalytic composite material, which is prepared by a sol-gel method and has a specific surface area of ​​800 to 1000 m 2 / g, pore size distribution 3 ~ 5nm. The material surface is loaded with bimetallic (Cu ~ Mn) oxide catalyst, which has high catalytic oxidation performance for VOCs. At normal temperature and pressure, the VOCs removal rate can reach more than 95%. The innovation lies in that the catalyst surface is also loaded with proton exchange resin, which can adsorb the acidic gas generated during the conversion process and extend the service life of the catalyst to 8 to 10 months. The residence time of the exhaust gas in this unit is controlled at 2 to 3 seconds, and the gas flow rate is 0.5 to 1.0 m / s.

[0018] As a preferred solution of the present invention, the spiral collecting tank has a built-in magnetic component, and the magnetic field strength of the magnetic component is 0.1-0.5T.

[0019] The beneficial effects of the present invention are:

[0020] 1. The centrifugal stirring unit of the present invention generates centrifugal force in the treated wastewater, and the nano S-ZVI material is thrown into the spiral collecting trough under the action of the centrifugal force, and then slides along the spiral collecting trough to the edge of the bottom of the collecting cylinder, and is sucked away by the material negative pressure recovery unit, so that the nano S-ZVI material is collected and reused. The wastewater after the nano S-ZVI material is centrifugally separated is collected from the upper part of the collecting cylinder by the treated wastewater collection unit. The waste gas is collected by the waste gas collection hood and sent to the downstream waste gas treatment device for treatment. The present invention can recycle the nano S-ZVI material, wastewater and waste gas respectively, and can reduce the cost of wastewater treatment through resource utilization.

[0021] 2. The waste gas collection pipeline of the present invention is connected in sequence with a chlorine gas treatment and recycling device and other waste gas treatment devices, and an innovative multi-stage composite waste gas treatment system is designed, which not only realizes efficient waste gas treatment, but also reduces treatment costs through resource utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the present invention;

[0023] Figure 2 It is a partial structural diagram of the present invention;

[0024] Figure 3 It is a cutaway structural diagram of a part of the structure of the present invention.

[0025] In the figure: 1-collecting cylinder; 2-spiral collecting tank; 3-material negative pressure recovery unit; 4-treated wastewater collection unit; 5-centrifugal stirring unit; 6-waste gas collection hood; 7-probe unit; 8-chlorine treatment and reuse device; 9-other waste gas treatment devices; 11-drain outlet; 31-material recovery collection pipe; 32-material discharge pipe; 41-treated wastewater collection annular pipe; 42-treated wastewater collection pipe; 51-support rod; 52-transmission rod; 53-wastewater agitator; 54-drain outlet plug; 61-waste gas collection pipeline; 71-probe lifting rod; 72-360° probe; 73-high-pressure water nozzle. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0028] like Figure 1 to Figure 3 As shown, the material recovery device after wastewater treatment in this embodiment includes a collecting cylinder 1, a spiral collecting groove 2 is arranged on the inner wall of the collecting cylinder 1, and the spiral collecting groove 2 has a built-in magnetic component, and the magnetic field strength of the magnetic component is 0.1~0.5T; a material negative pressure recovery unit 3 is arranged at the bottom of the collecting cylinder 1, and a treated wastewater collection unit 4 is connected to the upper part of the collecting cylinder 1, and a centrifugal stirring unit 5 is installed in the collecting cylinder 1; the top of the collecting cylinder 1 is connected to an exhaust gas collection cover 6, and a probe unit 7 is installed in the exhaust gas collection cover 6.

[0029] The centrifugal stirring unit 5 of the present invention generates centrifugal force in the treated wastewater, and the nano S-ZVI material is thrown into the spiral collecting trough 2 under the action of the centrifugal force, and then slides along the spiral collecting trough 2 to the edge of the bottom of the collecting cylinder 1, and is sucked away by the material negative pressure recovery unit 3, so that the nano S-ZVI material is collected and reused. The wastewater after the nano S-ZVI material is centrifugally separated is collected from the upper part of the collecting cylinder 1 by the treated wastewater collection unit 4. The waste gas is collected by the waste gas collection cover 6 and sent to the downstream waste gas treatment device for treatment. The present invention can recycle the nano S-ZVI material, wastewater and waste gas respectively, and can reduce the cost of wastewater treatment through resource utilization.

[0030] Specifically, the material negative pressure recovery unit 3 includes a material recovery collection pipe 31, which is arranged at the bottom of the collection cylinder 1, and is annular in shape. The material recovery collection pipe 31 is connected to a negative pressure device, and is connected to a material discharge pipe 32, and the other end of the material discharge pipe 32 extends out of the collection cylinder 1. After the negative pressure device is started, the nano S-ZVI material sliding down from the spiral collection trough 2 is sucked into the material recovery collection pipe 31 and collected through the material discharge pipe 32.

[0031] Specifically, the treated wastewater collection unit 4 includes a treated wastewater collection annular tube 41, which is sleeved outside the collection cylinder 1, and is connected to a plurality of treated wastewater collection tubes 42, which extend from the upper part of the collection cylinder 1. After centrifugal separation, the sewage in the upper part contains less nano-S-ZVI materials. The wastewater enters the treated wastewater collection annular tube 41 through the plurality of treated wastewater collection tubes 42 to achieve wastewater collection.

[0032] Specifically, the centrifugal stirring unit 5 includes a support rod 51, which is connected to the collection cylinder 1, and a transmission rod 52 is installed on the support rod 51, and a wastewater agitator 53 is connected to the transmission rod 52. The transmission rod 52 drives the wastewater agitator 53 to rotate, so that the wastewater generates centrifugal force, so that the nano S-ZVI material is centrifuged into the spiral collection tank 2.

[0033] The transmission rod 52 is connected to the support rod 51 through a lifting mechanism, a drain port 11 is provided at the bottom of the collection cylinder 1, and a plug for the drain port 11 is connected to the bottom of the wastewater agitator 53. The lifting mechanism can drive the transmission rod 52, the wastewater agitator 53 and the plug for the drain port 11 to rise and fall as a whole, so that the plug for the drain port 11 blocks the drain port 11. When the 360° probe 72 is working, the wastewater agitator 53 stops stirring, and the plug for the drain port 11 moves down to the drain port 11 to block it.

[0034] Specifically, the probe unit 7 includes a probe lifting rod 71, which is installed in the exhaust gas collection cover 6. The lower end of the probe lifting rod 71 is connected to a 360° probe 72. The 360° probe 72 is used to identify whether there is nano S-ZVI material in the spiral collection tank 2. When the 360° probe 72 is working, the drain outlet 11 is blocked by a plug.

[0035] The 360° probe 72 is provided with a high-pressure water nozzle 73. The water source of the high-pressure water nozzle 73 comes from the treated wastewater.

[0036] Furthermore, the top of the waste gas collection hood 6 is connected to a waste gas collection pipeline 61, and the other end of the waste gas collection pipeline 61 is connected to a chlorine treatment and recycling device 8. The chlorine treatment and recycling device 8 uses a water ring vacuum pump to create a negative pressure environment, and uses circulating cooling water (5-10°C) as an absorption medium. Since the solubility of chlorine is much higher than that of other gases, chlorine can be selectively enriched at this stage. The enriched chlorine-containing solution is connected to a sodium hypochlorite generator after precise filtration, and the recovered chlorine is converted into a sodium hypochlorite product with higher market value. The effective chlorine content of the product can reach 10-12%, and the conversion rate is over 85%.

[0037] The chlorine treatment and recycling device 8 is connected to other waste gas treatment devices 9 through pipelines. Other waste gas treatment devices 9 are used to treat other waste gases such as VOCs. Other waste gas treatment devices 9 use a new porous titanium-based catalytic composite material, which is prepared by a sol-gel method and has a specific surface area of ​​800 to 1000 m 2 / g, pore size distribution 3 ~ 5nm. The material surface is loaded with bimetallic (Cu ~ Mn) oxide catalyst, which has high catalytic oxidation performance for VOCs. At normal temperature and pressure, the VOCs removal rate can reach more than 95%. The innovation lies in that the catalyst surface is also loaded with proton exchange resin, which can adsorb the acidic gas generated during the conversion process and extend the service life of the catalyst to 8 to 10 months. The residence time of the exhaust gas in this unit is controlled at 2 to 3 seconds, and the gas flow rate is 0.5 to 1.0 m / s.

[0038] The present invention is not limited to the above-mentioned optional implementation modes. Anyone can derive other various forms of products under the inspiration of the present invention. However, no matter what changes are made in the shape or structure, all technical solutions that fall within the scope defined by the claims of the present invention fall within the protection scope of the present invention.

Claims

1. A material recovery device after wastewater treatment, characterized in that: The invention comprises a collecting cylinder (1), wherein a spiral collecting groove (2) is arranged on the inner wall of the collecting cylinder (1), a material negative pressure recovery unit (3) is arranged at the bottom of the collecting cylinder (1), a treated wastewater collection unit (4) is connected to the upper part of the collecting cylinder (1), and a centrifugal stirring unit (5) is installed in the collecting cylinder (1); the top of the collecting cylinder (1) is connected to an exhaust gas collection hood (6), and a probe unit (7) is installed in the exhaust gas collection hood (6).

2. The material recovery device after wastewater treatment according to claim 1 is characterized by: The material negative pressure recovery unit (3) comprises a material recovery collection pipe (31), which is arranged at the bottom of the collection cylinder (1), and is in the shape of a ring. The material recovery collection pipe (31) is connected to a negative pressure device, and is connected to a material discharge pipe (32), and the other end of the material discharge pipe (32) extends out of the collection cylinder (1).

3. The material recovery device after wastewater treatment according to claim 1, characterized in that: The treated wastewater collection unit (4) comprises a treated wastewater collection annular tube (41), the treated wastewater collection annular tube (41) being sleeved outside the collection cylinder (1), a plurality of treated wastewater collection tubes (42) being connected to the treated wastewater collection annular tube (41), and the treated wastewater collection tubes (42) extending from the upper part of the collection cylinder (1).

4. The material recovery device after wastewater treatment according to claim 1 is characterized by: The centrifugal stirring unit (5) comprises a supporting rod (51), the supporting rod (51) is connected to the inside of the collecting cylinder (1), a transmission rod (52) is mounted on the supporting rod (51), and a wastewater stirrer (53) is connected to the transmission rod (52).

5. The material recovery device after wastewater treatment according to claim 4 is characterized by: The transmission rod (52) is connected to the support rod (51) via a lifting mechanism, a drain outlet (11) is provided at the bottom of the collection cylinder (1), and a plug of the drain outlet (11) is connected to the bottom of the wastewater agitator (53).

6. The material recovery device after wastewater treatment according to claim 1, characterized in that: The probe unit (7) comprises a probe lifting rod (71), the probe lifting rod (71) is installed in the exhaust gas collection cover (6), and the lower end of the probe lifting rod (71) is connected to a 360° probe (72).

7. The material recovery device after wastewater treatment according to claim 6, characterized in that: The 360° probe (72) is provided with a high-pressure water spray head (73).

8. The material recovery device after wastewater treatment according to claim 1, characterized in that: The top of the waste gas collection hood (6) is connected to a waste gas collection pipeline (61), and the other end of the waste gas collection pipeline (61) is connected to a chlorine gas treatment and recycling device (8).

9. The material recovery device after wastewater treatment according to claim 8, characterized in that: The chlorine gas treatment and recycling device (8) is connected to other waste gas treatment devices (9) via a pipeline.

10. A material recovery device after wastewater treatment according to any one of claims 1 to 9, characterized in that: The spiral collecting tank (2) has a built-in magnetic component, and the magnetic field strength of the magnetic component is 0.1-0.5T.

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