Process device for treating high-organic-matter-content salt-containing wastewater

Abstract

The utility model discloses a high-organic-matter-content salt-containing wastewater treatment process device, which is characterized by comprising a comprehensive wastewater regulating tank, and a UASB (Upflow Anaerobic Sludge Blanket) reaction tower, a biochemical water inlet tank, a biochemical water distribution tank, an aerobic tank, an anoxic tank, a PACT (Plural Amplified Carbon Treating) tank, a coagulative precipitation tank and a discharge tank which are sequentially connected with the comprehensive wastewater regulating tank, the inlet of the comprehensive wastewater adjusting tank is also connected with a desalting device. According to the sewage treatment process device disclosed by the utility model, the system water adjusting device is additionally arranged, so that the fluctuation impact of wastewater is effectively dealt with, and the sewage treatment capability and the fault-tolerant capability are improved; meanwhile, the chromaticity of the effluent is reduced and the COD (Chemical Oxygen Demand) of the effluent is ensured to be less than 265 ppm by additionally arranging a pretreatment and optimization system coagulating sedimentation unit.

Description

Technical Field

[0001] The utility model belongs to the technical field of sewage treatment, and particularly relates to a treatment process device and technology for high-salt and high-organic wastewater. Background Art

[0002] The main process of existing wastewater treatment is as follows: after high-concentration salt-containing wastewater is collected, the pH value is adjusted to alkaline and enters the MVR evaporator for multiple evaporation. The evaporated condensate enters the physicochemical waste liquid receiving pool, and the evaporated solid waste is handed over to a qualified unit for treatment. The dicamba product enters the physicochemical wastewater receiving pool after heating, concentration and condensation; the cyanide-containing wastewater enters the physicochemical receiving pool after oxidation, the sterilization wastewater enters the physicochemical treatment pool after ozone oxidation, and other wastewater enters the physicochemical collection pool after collection. The wastewater in the physicochemical collection pool enters the biochemical water inlet pool after Fenton coagulation treatment, and domestic wastewater and rainwater directly enter the biochemical water inlet pool, and then pass through the aerobic biochemical treatment pool, sedimentation tank, anoxic hydrolysis tank, and PACT treatment pool. The physicochemical sludge and biochemical sludge are concentrated in the sludge concentration tank and then transported out after dehydration and filtration.

[0003] Due to the expansion of production scale, the amount of wastewater produced by enterprises has increased year by year. The existing sewage treatment facilities can no longer effectively meet the production requirements. The average daily discharge volume exceeds the amount specified in the discharge permit, and there is a risk of limited discharge in the later period. At the same time, the space for collecting and adjusting high-salt and high-organic wastewater is small, which cannot meet the needs of existing system operation. At the same time, due to the difficulty of water distribution operation, low fault tolerance and insufficient impact resistance of the system, in order to better serve production and reduce the total amount of enterprise pollution, it is necessary to design a more suitable wastewater treatment process equipment. Summary of the invention

[0004] In view of the problems existing in the prior art, the purpose of the utility model is to provide a process device for treating wastewater containing high organic matter and salt.

[0005] In order to solve the above technical problems, the utility model adopts the following technical scheme: a process device for treating high-organic-salt wastewater, comprising a comprehensive wastewater regulating tank, and a UASB reaction tower, a biochemical water inlet tank, a biochemical water distribution tank, an aerobic tank, an anoxic tank, a PACT tank, a coagulation sedimentation tank and a discharge tank connected to the comprehensive wastewater regulating tank in sequence, and the inlet of the comprehensive wastewater regulating tank is also connected to a desalination device.

[0006] Preferably, the desalination device comprises a high-salt wastewater collection pool, and an MVR evaporator and a low-salt wastewater collection pool connected to the high-salt wastewater collection pool. The low-salt wastewater collection pool is connected to a comprehensive wastewater regulating pool via a pipeline pump.

[0007] Preferably, the inlet of the biochemical water inlet pool is also connected to a low-concentration wastewater regulating pool and an acid-base wastewater collecting pool.

[0008] Preferably, a sedimentation separation tank and an intermediate lifting tank are connected after the biochemical water inlet distribution tank and the aerobic tank. The upper part of the sedimentation separation tank is connected to the intermediate lifting tank through an overflow tank, and the bottom of the sedimentation separation tank is connected to a sludge thickening tank through a sludge pump; the intermediate lifting tank is connected to the anoxic tank through a lifting pump pipeline.

[0009] Preferably, a sedimentation separation tank and an intermediate lifting tank are provided between the PACT tank and the coagulation sedimentation tank. The upper part of the sedimentation separation tank is connected to the intermediate lifting tank through an overflow trough, and the bottom of the sedimentation separation tank is connected to a sludge thickening tank through a sludge pump; the intermediate lifting tank is connected to the coagulation sedimentation tank through a lifting pump pipeline.

[0010] Preferably, the UASB reaction tower includes a distributor arranged at the bottom, and a wastewater outlet is also provided at the top of the UASB reaction tower. The wastewater outlet is cyclically connected to the distributor through a pipeline and a pump, and a pollution index tester is also provided on the pipeline.

[0011] Preferably, the low-salt wastewater collection pool is also provided with a domestic wastewater inlet pipe and an initial rainwater inlet pipe.

[0012] Beneficial effects: Compared with the prior art, the sewage treatment process device of the utility model adds a system water regulating device, which effectively copes with the impact of wastewater fluctuations and improves the sewage treatment capacity and fault tolerance; at the same time, by adding pretreatment and optimizing the system coagulation and sedimentation unit, the chromaticity of the effluent is reduced, and the effluent COD is ensured to be below 265ppm. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a structural diagram of the process device for treating high-organic-matter-containing and salt-containing wastewater described in the utility model.

[0014] Figure 2 This is a connection diagram between the sedimentation separation tank and the intermediate lifting tank described in the utility model.

[0015] Figure 3 It is a schematic diagram of the structure of the UASB reactor described in the utility model. DETAILED DESCRIPTION

[0016] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the present invention, modifications of various equivalent forms of the present invention by those skilled in the art all fall within the scope defined by the claims attached to this application.

[0017] In view of the shortcomings of the existing technology, such as Figure 1-3As shown, the utility model provides a high-organic salt-containing wastewater treatment process device, including a comprehensive wastewater regulating tank, and a UASB reaction tower, a biochemical water inlet tank, a biochemical water distribution tank, an aerobic tank, an anoxic tank, a PACT tank, a coagulation sedimentation tank and a discharge tank connected to the comprehensive wastewater regulating tank in sequence, and the inlet of the comprehensive wastewater regulating tank is also connected to a desalination device. The desalination device includes a high-salt wastewater collection tank, and an MVR evaporator and a low-salt wastewater collection tank connected to the high-salt wastewater collection tank. The high-salt wastewater collection tank includes a sodium salt and a potassium salt wastewater collection tank, and the crude salt of sodium and potassium is recovered by MVR evaporation and concentration respectively.

[0018] Preferably, the inlet of the biochemical water inlet pool is also connected to a low-concentration wastewater regulating pool and an acid-base wastewater collecting pool, so as to be suitable for recycling domestic and industrial wastewater.

[0019] As a preferred solution, the biochemical water inflow distribution tank is connected to the aerobic tank with a sedimentation separation tank and an intermediate lifting tank. The upper part of the sedimentation separation tank is connected to the intermediate lifting tank through an overflow trough, and the bottom of the sedimentation separation tank is connected to a sludge concentration tank through a sludge pump; the intermediate lifting tank is connected to the anoxic tank through a lifting pump pipeline. A sedimentation separation tank and an intermediate lifting tank are also provided between the PACT tank and the coagulation sedimentation tank. The upper part of the sedimentation separation tank is connected to the intermediate lifting tank through an overflow trough, and the bottom of the sedimentation separation tank is connected to a sludge concentration tank through a sludge pump; the intermediate lifting tank is connected to the coagulation sedimentation tank through a lifting pump pipeline. In the present invention, both the aerobic tank and the anaerobic tank are provided with a biochemical water distribution tank to increase the system regulation capacity to effectively cope with the impact of wastewater fluctuations and improve the system's impact resistance. At the same time, a coagulation sedimentation tank with a lifting tank is provided after the aerobic tank and the anaerobic tank to perform multi-stage separation of intermediate biological reaction sedimentation products to improve the efficiency of aerobic and anaerobic reactions.

[0020] In order to improve the efficiency of the UASB reactor, a distributor is provided at the bottom of the UASB reaction tower of the present invention to improve the contact between wastewater and microorganisms, and a circulating reaction pump and a pollution index tester are arranged on the side wall of the reactor to ensure that the wastewater entering the subsequent process meets the standards.

[0021] The utility model is designed and modified according to a daily COD load of 16 tons (calculated based on a daily treatment of 600 tons of 20,000 CODcr wastewater). The designed effluent COD can be controlled below 260ppm, which can increase the treatment capacity of the entire sewage treatment facility system by more than 100%.

Claims

1. A process device for treating high-organic-content salt-containing wastewater, characterized in that: It comprises a comprehensive wastewater regulating tank, and a UASB reaction tower, a biochemical water inlet tank, a biochemical water distribution tank, an aerobic tank, an anoxic tank, a PACT tank, a coagulation sedimentation tank and a discharge tank which are sequentially connected to the comprehensive wastewater regulating tank. The inlet of the comprehensive wastewater regulating tank is also connected to a desalination device.

2. The high-organic-containing salt-containing wastewater treatment process device according to claim 1 is characterized in that: The desalination device comprises a high-salt wastewater collection pool, an MVR evaporator connected to the high-salt wastewater collection pool, and a low-salt wastewater collection pool, wherein the low-salt wastewater collection pool is connected to a comprehensive wastewater regulating pool via a pipeline pump.

3. The high-organic-containing salt-containing wastewater treatment process device according to claim 1 is characterized in that: The inlet of the biochemical water inlet pool is also connected to a low-concentration wastewater regulating pool and an acid-base wastewater collecting pool.

4. The high-organic-containing salt-containing wastewater treatment process device according to claim 1 is characterized in that: A sedimentation separation tank and an intermediate lifting tank are connected behind the biochemical water distribution tank and the aerobic tank. The upper part of the sedimentation separation tank is connected to the intermediate lifting tank through an overflow tank, and the bottom of the sedimentation separation tank is connected to a sludge concentration tank through a sludge pump; the intermediate lifting tank is connected to the anoxic tank through a lifting pump pipeline.

5. The high-organic-containing salt-containing wastewater treatment process device according to claim 1 is characterized in that: A sedimentation separation tank and an intermediate lifting tank are also provided between the PACT tank and the coagulation sedimentation tank. The upper part of the sedimentation separation tank is connected to the intermediate lifting tank through an overflow tank, and the bottom of the sedimentation separation tank is connected to a sludge thickening tank through a sludge pump; the intermediate lifting tank is connected to the coagulation sedimentation tank through a lifting pump pipeline.

6. The high-organic-containing salt-containing wastewater treatment process device according to claim 1 is characterized in that: The UASB reaction tower comprises a distributor arranged at the bottom, and a wastewater collection port is also arranged at the top of the UASB reaction tower. The wastewater collection port is cyclically connected with the distributor through a pipeline and a pump, and a pollution index tester is also arranged on the pipeline.

7. The high-organic-containing salt-containing wastewater treatment process device according to claim 2 is characterized in that: The low-salt wastewater collection pool is also provided with a domestic wastewater inlet pipe and an initial rainwater inlet pipe.

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