Wastewater advanced treatment device applied to industrial park

Abstract

The utility model relates to a wastewater advanced treatment device applied to an industrial park. The wastewater advanced treatment device comprises a water collecting tank, a regulating tank, a primary sedimentation tank, a two-stage A / O (Anoxic / Oxic) tank connector, a secondary sedimentation tank connector, a sludge return well, a coagulative precipitation tank, an intermediate water tank, a catalytic ozonation device, a BAF (Biological Aerated Filter), a backwashing wastewater tank and a clean water tank which are connected with one another. According to the device, the reliability of sewage treatment can be respectively controlled and ensured, meanwhile, the stability of sewage treatment can be improved, and the influence on the environment is reduced; the sewage treatment process can be flexibly combined, and meanwhile, the sewage treatment process can be optimized and adjusted according to different sewage treatment requirements. The device solves the problem of difficult-to-degrade COD (Chemical Oxygen Demand) in the wastewater in the industrial park, improves the B / C value, improves the biodegradability of the whole wastewater, can further remove organic matters and phosphorus in the wastewater, improves the wastewater treatment efficiency, and ensures that the high-difficulty wastewater in the chemical park is stably treated and reaches the national standard of class 4 water after upgrading.

Description

Technical Field

[0001] The utility model belongs to the technical field of industrial wastewater treatment, and in particular relates to a wastewater deep treatment device applied to an industrial park. Background Art

[0002] Industrial parks can not only realize resource conversion, recycling, and increase GDP, but more importantly, they can improve the level of science and technology and equipment by introducing and developing high-tech, and can also cultivate high-quality scientific and technological and management talents. With the continuous emergence of industrial parks in various places, the problems caused by the phased increase and particularity of industrial park wastewater are becoming increasingly prominent:

[0003] 1. The enterprises in the park are messy, with numerous production facilities, irregular wastewater discharge and large fluctuations in water volume;

[0004] 2. The quality of wastewater is complex. After pretreatment by the enterprise, it often contains inert COD that is resistant to biochemical, photochemical and oxidation, and has poor biodegradability;

[0005] Wastewater reuse first needs to be deeply treated to reduce the effluent COD. In order to solve the above problems, a deep treatment device for industrial park wastewater is proposed. Utility Model Content

[0006] The purpose of the utility model is to solve the above-mentioned problems. The present application proposes a wastewater deep treatment device applied to industrial parks, which solves the problem of difficult-to-degrade COD in wastewater in industrial parks, improves the B / C value, and improves the overall biodegradability of wastewater. At the same time, it can further remove organic matter and phosphorus in sewage, improve the efficiency of sewage treatment, and ensure that the treatment of high-difficulty wastewater in chemical parks is stable and meets the four-category water standard after the national standard is raised.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a wastewater deep treatment device applied to industrial parks, comprising a water collection tank, a regulating tank, a primary sedimentation tank, a two-stage A / O tank, a coagulation sedimentation tank, an ozone catalytic oxidation device, a BAF filter tank, and a clear water tank, wherein the water collection tank, the regulating tank, and the primary sedimentation tank are connected to each other, a stirrer is provided in the regulating tank, a scraper is provided in the primary sedimentation tank, the primary sedimentation tank is connected to the two-stage A / O tank, a flow pusher and a reflux pump are provided in the A / O tank, and the two-stage A / O tank is connected to the secondary sedimentation tank. Then, a second scraper is provided in the secondary sedimentation tank, and the second sedimentation tank is respectively connected to a sludge return well and a coagulation sedimentation tank, the sludge return well is connected to a two-stage A / O tank, a mixing mixer and a third scraper are provided in the coagulation sedimentation tank, the coagulation sedimentation tank is connected to an intermediate water tank, the intermediate water tank is connected to an ozone catalytic oxidation device, the ozone catalytic oxidation device is connected to a BAF filter tank, the ozone catalytic oxidation device and the BAF filter tank are both connected to a backwash wastewater tank, the backwash wastewater tank is connected to a water collection tank, the BAF filter tank is connected to a clear water tank, and the clear water tank is provided with a water outlet.

[0008] Furthermore: the ozone catalytic oxidation device includes an ozone generator and a catalytic oxidation reaction tank. The ozone generator is connected to the catalytic oxidation reaction tank through a pipeline. Aeration holes are provided at the bottom of the catalytic oxidation reaction tank. A flow meter, a COD detector and an ozone analyzer are arranged on the ventilation pipeline between the ozone generator and the catalytic oxidation reaction tank. The outlet and the inlet of the catalytic oxidation reaction tank are both connected to a circulation pump group. A flow meter is provided on the connecting pipe between the circulation pump group and the outlet of the catalytic oxidation reaction tank.

[0009] Furthermore: the BAF filter tank includes a water distribution area and multiple BAF reaction areas, and filter materials are arranged in the multiple BAF reaction areas. The multiple BAF reaction areas are connected to the clean water tank through a collection channel.

[0010] Furthermore: a lifting pump group 1 is provided on the pipeline connecting the water collection tank and the regulating tank, a lifting pump group 2 is provided on the pipeline connecting the regulating tank and the primary sedimentation tank, and a lifting pump group 3 is provided on the pipeline connecting the intermediate water tank and the ozone catalytic oxidation device.

[0011] Furthermore: the primary sedimentation tank is provided with a sludge pump 1, the secondary sedimentation tank is provided with a sludge pump 2, and the coagulation sedimentation tank is provided with a sludge pump 3.

[0012] Preferably: the ozone catalytic oxidation device, BAF bioreactor, and two-stage A / O pool are all connected to the air distribution pipe of the blower, and valves are provided on the connecting pipes.

[0013] Preferably: the regulating tank is also connected to a PH dosing device, the two-stage A / O tank is also connected to a carbon source dosing device, the coagulation sedimentation tank is also connected to a PAC device and a PAM device, and the ozone catalytic oxidation device is also connected to a synergistic oxidant device.

[0014] Preferably: the PH dosing device, PAC device, PAM device and cooperative oxidant device are all provided with dosing pipes, and the dosing pipes are all provided with metering pumps.

[0015] Preferred: The blower provides dissolved oxygen to the O tank of the two-stage A / O tank.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] This device targets the inert COD that is resistant to biochemical, photochemical, and oxidation, and has poor biodegradability. It can effectively remove most organic matter and COD and other indicators, and is less affected by water quality than other advanced oxidation processes. The treatment effect will not be affected by factors such as raw water load and sludge age, and it can efficiently and stably remove organic matter and COD and other indicators. The various areas in this device cooperate with each other to solve the problem of difficult-to-degrade COD in industrial park wastewater, improve the B / C value, and improve the overall biodegradability of wastewater. At the same time, it can further remove organic matter and phosphorus in sewage, improve the efficiency of sewage treatment, and ensure that the treatment of high-difficulty wastewater in chemical parks is stable and meets the national Class IV water standards after the standard is raised.

[0018] The device can be controlled separately to ensure the reliability of sewage treatment, while also improving the stability of sewage treatment and reducing the impact on the environment; it can also be used in combination to achieve a flexible combination of sewage treatment processes, and can also be optimized and adjusted according to different sewage treatment needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only for more clearly illustrating the embodiments of the utility model or the technical solutions in the prior art. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0020] Figure 1 This is a schematic diagram of the overall structural framework of the utility model; DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand and implement the technical solution of the utility model, the utility model is further described below in conjunction with specific embodiments. However, the embodiments are only used as an explanation of the utility model and are not intended to limit the utility model.

[0022] like Figure 1 A wastewater deep treatment device for industrial parks is shown, comprising a water collection tank, a regulating tank, and a primary sedimentation tank. The water collection tank, the regulating tank, and the primary sedimentation tank are connected to each other, the primary sedimentation tank is connected to a two-stage A / O tank, the two-stage A / O tank is connected to a secondary sedimentation tank, the secondary sedimentation tank is respectively connected to a sludge return well and a coagulation sedimentation tank, the sludge return well is connected to a two-stage A / O tank, the coagulation sedimentation tank is connected to an intermediate water tank, the intermediate water tank is connected to an ozone catalytic oxidation device, the ozone catalytic oxidation device is connected to a BAF filter tank, the ozone catalytic oxidation device and the BAF filter tank are both connected to a backwash wastewater tank, the backwash wastewater tank is connected to a water collection tank, the BAF filter tank is connected to a clean water tank, and the clean water tank is provided with a water outlet.

[0023] The regulating tank is also connected to a PH dosing device, the two-stage A / O tank is also connected to a carbon source dosing device, the coagulation sedimentation tank is also connected to a PAC device and a PAM device, and the ozone catalytic oxidation device is also connected to a synergistic oxidant device. The PH dosing device, PAC device, PAM device and synergistic oxidant device are all provided with dosing pipes, and the dosing pipes are all provided with metering pumps.

[0024] The regulating tank is provided with a stirrer, the primary sedimentation tank is provided with a first scraper, the secondary sedimentation tank is provided with a second scraper, and the coagulation sedimentation tank is provided with a mixing stirrer and a third scraper.

[0025] A first lifting pump group is provided on the pipeline connecting the water collection tank and the regulating tank, a second lifting pump group is provided on the pipeline connecting the regulating tank and the primary sedimentation tank, and a third lifting pump group is provided on the pipeline connecting the intermediate water tank and the ozone catalytic oxidation device.

[0026] The device is also provided with a blower, the air distribution pipe of the blower is connected with the ozone catalytic oxidation device, the BAF bioreactor, and the two-stage A / O pool, and a valve is provided on the connecting pipe.

[0027] The A / O pool is provided with a flow pusher and a reflux pump. The A / O pool comprises an A pool and an O pool. The A pool fully mixes sewage and microorganisms through the flow pusher, and the blower provides dissolved oxygen for the O pool, so that the dissolved oxygen in the O pool is controlled at 4±1 mg / L during operation, providing sufficient dissolved oxygen for the microorganisms to achieve nitrification and dephosphorization; the dissolved oxygen in the A pool is controlled at 0.2±0.5 mg / L; and the pH value of the A pool is adjusted to 7.0±1 through the pH online monitoring system.

[0028] A sludge return well is provided outside the secondary sedimentation tank, through which part of the sludge in the secondary sedimentation tank can be returned to the A pool, and the return volume is controlled at 60%~100%, and the return part of the nitrate needs to ensure the sludge concentration. The sludge volume and the return volume of the nitrification liquid are controlled by the monitoring instrument, and the return volume is fed back by the water quality index to achieve a dynamic balance. The basic control range of the return volume is: the return volume from the primary O pool to the A pool is controlled at 150%~200%, and the return volume from the secondary O pool to the A pool is controlled at 200%~300%.

[0029] The ozone catalytic oxidation device comprises an ozone generator and a catalytic oxidation reaction tank, wherein the ozone generator is connected to the catalytic oxidation reaction tank through a pipeline, an aeration hole is provided at the bottom of the catalytic oxidation reaction tank, and a catalyst having Mn and Fe as main active ingredients and Al2O3 as a carrier is built into the catalytic oxidation reaction tank. A COD detector is provided at the water inlet end of the catalytic oxidation reaction tank to detect the water inlet state and control the dosage of ozone and synergistic oxidant.

[0030] The BAF filter tank includes a water distribution area and multiple BAF reaction areas, each of which is provided with filter material. The multiple BAF reaction areas are connected to the clean water tank through a collection channel, and the outlet of the clean water tank controls the liquid flow of the BAF reaction area and the catalytic oxidation reaction tank through a backwash pump group and a valve.

[0031] The backwash wastewater tank receives the backwash wastewater from the BAF reaction zone and the catalytic oxidation reaction tank. The water in the backwash wastewater tank is then sent to the front water collection tank through a lift pump group for further filtration.

[0032] A flow meter, a COD detector and an ozone analyzer are arranged on the ventilation pipe between the ozone generator and the catalytic oxidation reaction tank. The outlet and the inlet of the catalytic oxidation reaction tank are both connected to a circulation pump group. A flow meter is arranged on the connecting pipe between the circulation pump group and the outlet of the catalytic oxidation reaction tank. Example

[0033] This device is used in a wastewater treatment project in an industrial park in Shaanxi Province. The project is located in the northern part of Shaanxi Province. Due to the complexity of the enterprises in the park, including many coal mining enterprises, the concentrations of ammonia nitrogen, oil, toxic and harmful substances (such as phenols, heterocyclic compounds, etc.) in the wastewater are relatively high, which will inhibit the ordinary biochemical treatment process. In order to solve this problem, this process is adopted and has been in operation for 2 years, and the effluent has been stably up to standard.

[0034] Specific:

[0035] 1) Conditioning and adjustment: The raw water first passes through the water collection tank and enters the regulating tank to even out the water volume and adjust the pH;

[0036] 2) Initial sedimentation: After the primary sedimentation tank, the suspended matter and sand are removed;

[0037] 3) Biochemical treatment: the effluent from the primary sedimentation tank flows into the two-stage A / O biochemical tank and the secondary sedimentation tank to remove pollutants such as COD and ammonia nitrogen;

[0038] Among them, the specific treatment method of the two-stage A / O biochemical pool and the secondary sedimentation tank is: the A pool fully mixes the sewage and microorganisms through the flow pusher, and the blower provides dissolved oxygen for the O pool, so that the dissolved oxygen during the operation of the O pool is controlled at 4±1mg / L, providing sufficient dissolved oxygen for the microorganisms to achieve nitrification and phosphorus removal; the dissolved oxygen in the A pool is controlled at 0.2±0.5mg / L; the organic matter in the influent is preferentially consumed in the denitrification of the primary A pool and the normal metabolism of the heterotrophic bacteria in each pool; when the organic matter is insufficient, it is supplemented by adding a carbon source outside the secondary A pool, and the supplement amount is jointly determined by the nitrate and ORP monitoring instruments. The secondary sedimentation tank can return a part of the sludge to the primary A pool through the sludge return well, and the return volume is controlled at 60%~100%, and part of the nitrate is returned to ensure the sludge concentration;

[0039] 4) Deep treatment: The water treated in the two-stage A / O biochemical tank and the secondary sedimentation tank is pumped into the ozone catalytic oxidation device through the intermediate water tank and the three-pump lifting pump group. Ozone and synergistic oxidant are added at the same time. The residence time HRT in the catalytic oxidation reaction tank is 20~40min. After the reaction is completed, it flows into the BAF reaction zone by gravity. The residence time HRT is 20~30min. The backwash time is determined by the suspended solids concentration in the effluent water. The backwash cycle is 24~48h.

[0040] 5) Test the wastewater after reaction treatment. If the COD value drops to 30 mg / L, it meets the reuse or discharge standards.

[0041] This device solves the problem of difficult-to-degrade COD in industrial park wastewater, improves the B / C value, and improves the overall biodegradability of wastewater. At the same time, it can further remove organic matter and phosphorus in sewage, improve the efficiency of sewage treatment, and ensure that the treatment of difficult wastewater in chemical parks is stable and meets the national Class IV water standards after the standard is raised. It can also reduce the generation of sludge and reduce the cost of sludge treatment.

[0042] The contents not described in detail in the present invention are all prior art.

[0043] The above is only a preferred embodiment of the utility model, and is not limited to the description in the specification and implementation. Therefore, any equivalent changes or modifications made according to the structure, features and principles described in the scope of the utility model patent application should be included in the scope of the utility model patent application.

Claims

1. A wastewater deep treatment device used in industrial parks, comprising a water collection tank, a regulating tank, a primary sedimentation tank, a two-stage A / O tank, a coagulation sedimentation tank, an ozone catalytic oxidation device, a BAF filter tank, and a clear water tank, characterized in that: The water collecting tank, regulating tank and primary sedimentation tank are connected to each other, a stirrer is provided in the regulating tank, a first scraper is provided in the primary sedimentation tank, the primary sedimentation tank is connected to the two-stage A / O tank, a flow pusher and a reflux pump are provided in the two-stage A / O tank, the two-stage A / O tank is connected to the secondary sedimentation tank, a second scraper is provided in the secondary sedimentation tank, the secondary sedimentation tank is respectively connected to the sludge return well and the coagulation sedimentation tank, the sludge return well is connected to the two-stage A / O tank, a mixing stirrer and a third scraper are provided in the coagulation sedimentation tank, the coagulation sedimentation tank is connected to the intermediate water tank, the intermediate water tank is connected to the ozone catalytic oxidation device, the ozone catalytic oxidation device is connected to the BAF filter, the ozone catalytic oxidation device and the BAF filter are both connected to the backwash wastewater tank, the backwash wastewater tank is connected to the water collecting tank, the BAF filter is connected to the clear water tank, the clear water tank is provided with a water outlet, and a valve is provided at the water outlet.

2. The wastewater deep treatment device used in an industrial park according to claim 1, characterized in that: The ozone catalytic oxidation device comprises an ozone generator and a catalytic oxidation reaction tank. The ozone generator is connected to the catalytic oxidation reaction tank through a pipeline. Aeration holes are arranged at the bottom of the catalytic oxidation reaction tank. A flow meter, a COD detector and an ozone analyzer are arranged on the ventilation pipeline between the ozone generator and the catalytic oxidation reaction tank. The outlet and the inlet of the catalytic oxidation reaction tank are both connected to a circulation pump group. A flow meter is arranged on the connecting pipe between the circulation pump group and the outlet of the catalytic oxidation reaction tank.

3. The wastewater deep treatment device used in an industrial park according to claim 1, characterized in that: The BAF filter tank comprises a water distribution area and a plurality of BAF reaction areas, wherein filter materials are arranged in the plurality of BAF reaction areas, and the plurality of BAF reaction areas are connected to the clean water tank through a collection channel.

4. The wastewater deep treatment device used in an industrial park according to claim 1, characterized in that: A first lifting pump group is provided on the pipeline connecting the water collection tank and the regulating tank, a second lifting pump group is provided on the pipeline connecting the regulating tank and the primary sedimentation tank, and a third lifting pump group is provided on the pipeline connecting the intermediate water tank and the ozone catalytic oxidation device.

5. The wastewater deep treatment device used in an industrial park according to claim 1, characterized in that: The primary sedimentation tank is provided with a sludge pump 1, the secondary sedimentation tank is provided with a sludge pump 2, and the coagulation sedimentation tank is provided with a sludge pump 3.

6. The wastewater deep treatment device used in an industrial park according to claim 1, characterized in that: The ozone catalytic oxidation device, the BAF bioreactor, and the two-stage A / O pool are all connected to the air distribution pipe of the blower, and valves are arranged on the connecting pipes.

7. The wastewater deep treatment device used in an industrial park according to claim 1, characterized in that: The regulating tank is also connected to a PH dosing device, the two-stage A / O tank is also connected to a carbon source dosing device, the coagulation sedimentation tank is also connected to a PAC device and a PAM device, and the ozone catalytic oxidation device is also connected to a cooperative oxidant device.

8. The wastewater deep treatment device used in an industrial park according to claim 7, characterized in that: The PH dosing device, the PAC device, the PAM device and the cooperative oxidant device are all provided with dosing pipes, and the dosing pipes are all provided with metering pumps.

9. The wastewater deep treatment device used in an industrial park according to claim 6, characterized in that: The blower provides dissolved oxygen to the O tank of the two-stage A / O tank.

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