Biochemical treatment system and method of waste water through conny pressure gasification

A crushed coal pressurized gasification and biochemical treatment technology, applied in water/sewage treatment, chemical instruments and methods, biological water/sewage treatment, etc., can solve problems such as poor impact resistance, large water quality fluctuations, and poor biochemical properties , to prevent the loss of the carrier, reduce the concentration of pollutants, and facilitate the effect of shedding

Inactive Publication Date: 2016-09-28
BEIJING SOUND ENVIRONMENTAL ENG +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Based on the problems existing in the above-mentioned prior art, the present invention provides a system and method for biochemical treatment of waste water from pressurized gasification of crushed coal, which can solve the problem of high toxicity, poor biodegradability, and l

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  • Biochemical treatment system and method of waste water through conny pressure gasification
  • Biochemical treatment system and method of waste water through conny pressure gasification

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Embodiment 1

[0058] A certain coal gasification wastewater is treated with a crushed coal pressurized gasification wastewater biochemical treatment system, with a treatment capacity of 0.8m 3 / h at a temperature of 35°C. BACB system HRT is about 50h, AO n The HRT of the system is about 300h, the circulation volume of the circulation pump is 800%, the return flow of the mixed liquid is 300%, and the return flow of the return pump is 100%. The influent COD of the biochemical system is about 7000mg / L, and the ammonia nitrogen is about 500mg / L. After being treated by the BACB system, the COD of the effluent is about 190mg / L, and the ammonia nitrogen is lower than 10mg / L, which can meet the "Comprehensive Wastewater Discharge Standard" (GB8978-1996 ) secondary emission standards.

Embodiment 2

[0060] A certain coal gasification wastewater is treated with a crushed coal pressurized gasification wastewater biochemical treatment system, with a treatment capacity of 1.2m 3 / h at a temperature of 35°C. BACB system HRT is about 33h, AO n The HRT of the system is about 200h, the circulation volume of the circulation pump is 600%, the return flow of the mixed liquid is 300%, and the return flow of the return pump is 100%. The COD of the influent water of the biochemical system is about 6700mg / L, and the ammonia nitrogen is about 450mg / L. After being treated by the BACB system, the COD of the effluent is about 270mg / L, and the ammonia nitrogen is lower than 10mg / L. It can be discharged or reused after advanced ozone treatment.

[0061]The biochemical treatment system of the present invention aims at the characteristics of high toxicity, poor biodegradability, and large water quality fluctuations of crushed coal pressurized gasification wastewater, and the problems of conven...

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Abstract

The invention discloses a biochemical treatment system and method for pressurized gasification waste water of crushed coal, which belongs to the field of waste water treatment. The coagulation reaction tank, the coagulation sedimentation tank and the clean water tank are connected in sequence; there is a defoaming water pipe between the clean water tank and the anoxic-multi-stage aerobic system; the lift pump is equipped with a device for introducing crushed coal pressurized gasification wastewater pretreatment effluent Water inlet pipe; the clean water pool is provided with an outlet pipe for discharging treated water. In this system, the dual-cycle anaerobic filler reaction system hydrolyzes large molecular organic matter into small molecular organic matter under anaerobic conditions, improving the biodegradability of wastewater; The effluent COD, ammonia nitrogen and total nitrogen are greatly reduced. The system has the advantages of good processing effect, low operation cost and simple operation.

Description

technical field [0001] The invention relates to the field of waste water treatment, in particular to a biochemical treatment system and method for crushed coal pressurized gasification waste water. Background technique [0002] The crushed coal pressurized gasification process (represented by Lurgi furnace) is a coal gasification process widely used in coal gasification, especially coal-to-natural gas. The process is mature, and the investment and operation costs are relatively low, but its wastewater treatment restricts the application of this technology. Crushed coal pressurized gasification wastewater contains a large amount of refractory organic compounds such as phenols, aromatic hydrocarbons, and heterocyclic compounds; it also contains high concentrations of oil, ammonia nitrogen, and salt; its biodegradability is poor, and it has an inhibitory effect on microorganisms , In addition, the fluctuation range of the wastewater quality is large, so the conventional bioche...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F101/30C02F101/16
CPCC02F9/00C02F1/5245C02F1/56C02F3/2806C02F3/2813C02F3/2873C02F3/302C02F2101/16C02F2101/30C02F2301/046
Inventor 邢林林阴俊霞李宝光张宏良吴迪姜安平王凯
Owner BEIJING SOUND ENVIRONMENTAL ENG
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