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Low concentration coal chemical industrial wastewater processing system

A coal chemical wastewater and treatment system technology, applied in the direction of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc. Energy consumption, anoxic stirring, high energy consumption, etc., to achieve the effect of improving processing capacity, reducing energy consumption, and high-efficiency load impact resistance

Inactive Publication Date: 2012-02-29
上海明诺环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the treatment of low-concentration coal chemical wastewater has the following problems: (1) Since SBR and MBR are mainly used, the energy consumption per ton of water is huge; Realize short-range nitrification and denitrification; (3) Automatic control is complicated and requires high operation
[0010] At present, although the low-concentration coal chemical wastewater treatment process, including SBR and MBR processes, can meet the discharge or reuse requirements, due to the complex automatic control system and the huge energy consumption of anoxic stirring in the SBR system, the MBR system has membrane depreciation and huge energy consumption. question

Method used

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  • Low concentration coal chemical industrial wastewater processing system
  • Low concentration coal chemical industrial wastewater processing system
  • Low concentration coal chemical industrial wastewater processing system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Such as figure 1 As shown, the low-concentration coal chemical wastewater is first fully homogenized in the regulating tank, and then transported from pipeline 1 to the anoxic tank 2. The denitrifying bacteria in the anoxic tank are used to fully denitrify, reduce the concentration of total nitrogen, and basically maintain anoxic The dissolved oxygen in the system is in the range of 0.0-0.1mg / L. The mixed liquid in the anoxic tank 2 is transported through the jet water pump 5 and distributed to the MFB reactor 8 by means of the jet 6. At the same time, the jet aeration system passes through the blower 3 and The valve 4 controls the amount of aeration, and blows and pressurizes the aeration of the ejector to improve the treatment efficiency of the ejector. The MFB reactor 8 is attached with high-efficiency composite packing. The dense packing can increase the total amount of microorganisms in the wastewater, and form three layers of anaerobic, anoxic and aerobic biofilms...

Embodiment 2

[0041] Coal chemical wastewater from a chemical company in Anhui (using aerospace gasification technology), designed to treat water volume: 1,000m 3 / d.

[0042] Table 2 Water quality of low-concentration coal chemical industry wastewater (space furnace)

[0043]

[0044] Process according to the process of Example 1, wherein technical indicators: anoxic section residence time HRT=16hr; MFB reactor residence time HRT=24hr; Alkali dosage: 150kg / d; Methanol dosage: 30kg / d; Surface load: 0.5m 3 / (m 2 d), power consumption per ton of water: 1.3KW h / m 3 .

[0045] Compared with the traditional SBR, the dosage of methanol is 20kg / d less, the floor area is saved by 20%, and the operating cost is saved by more than 40%.

Embodiment 3

[0047] A urea and methanol low-concentration coal chemical industry treatment wastewater in Shaanxi, the main water quality is shown in Table 3

[0048] Table 3 Influent and effluent indicators of wastewater treatment station

[0049]

[0050]

[0051] Process according to the process of Example 1, after the system treatment of the present invention: the effluent COD is less than 60mg / L, the ammonia nitrogen is less than 8mg / L, the amount of treated water is 200m3 / h, and the power consumption per ton of water is 2.84 kWh / ton of water, which is far lower than The SBR system is 5 kWh / ton of water and the MBR system is 4.84 kWh / ton of water.

[0052] The efficient filler used in embodiment 2 and embodiment 3, through molecular specific surface area test, novel filler specific surface area is 584m 2 / m 3 , much higher than the conventional fillers commonly used at present.

[0053] Table 1

[0054] project

[0055] Such as figure 2 As shown, the microbes ins...

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Abstract

The invention discloses a low concentration coal chemical industrial wastewater processing system. The system which comprises an anoxic tank, a jet aeration system, a microorganism-fixed bioreactor (MFB reactor) and a secondary sedimentation tank is characterized in that: low concentration coal chemical industrial wastewater goes through a barrier, flows out of an equalizing tank, flows into the anoxic tank, then flows out of the anoxic tank and enters the MFB reactor, the MFB reactor which adopts an advanced aeration mode of air blast jet increase and an enzymatic suspension filler in a patent has the advantages of low energy consumption, high oxygen utilization efficiency and small occupied area, and the low concentration coal chemical industrial wastewater which flows out of the MFB reactor enters the secondary sedimentation tank and then is discharged after standards are reached. The system of the invention, which allows problems of high energy consumption, complex operation program and the like existing in routine SBR systems and MBR systems to be successfully solved and has the advantages of strong operation stability, low investment cost, high processing efficiency and low operation cost, is a low concentration coal chemical industrial wastewater processing method with development potential.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a high-efficiency treatment system for low-concentration coal chemical wastewater, high-temperature coal gasification wastewater represented by Shell Furnace, Aerospace Furnace, Texaco, and derivatives such as methanol and synthetic ammonia. waste water produced. Background technique [0002] The coal chemical industry uses coal as a raw material and undergoes chemical processing to convert coal into gas, liquid, solid fuel and chemical products. It is mainly divided into coal coking, coal gasification, gasification to ammonia, coal gasification to other products and direct liquefaction, etc. . Coal chemical industry wastewater is mainly produced by high-temperature cracking of coal, and some wastewater will also be produced in the process of gas purification and recovery of chemical products. Coal chemical wastewater has high pollutant content and complex components, and can be...

Claims

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Application Information

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IPC IPC(8): C02F9/14
Inventor 姜洋王海峰郑勇王龙章明
Owner 上海明诺环境科技有限公司
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