A coal direct liquefaction sewage treatment system and method
A sewage treatment system, coal direct liquefaction technology, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems such as difficult purification and treatment of direct coal liquefaction sewage
Active Publication Date: 2017-09-05
CHNA ENERGY INVESTMENT CORP LTD +1
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Problems solved by technology
[0005] The purpose of the present invention is to provide a coal direct liquefaction sewage treatment system and method to solve the problem that the entire coal direct liquefaction sewage is difficult to purify and treat
Method used
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Embodiment 1
[0180] Sewage W0 is treated by process P1 to obtain sewage W1; then processed by process P2 to obtain sewage W2; then processed by process P3 to obtain sewage W3; and then processed by process P4 to obtain sewage W4; P5 is processed to obtain purified water W5.
[0181] Among them, the main indicators of sewage W4 are shown in Table 3; the main indicators of purified water W5 are shown in Table 4.
[0182] table 3
[0183] project oil BOD5 CODCr Ammonia nitrogen pH suspended matter index ≤5mg / l ≤10mg / l ≤50mg / l ≤5mg / l 6.5～9.0 ≤5mg / l
[0184] Table 4
[0185]
[0186]
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The invention discloses a sewage treatment system for direct coal liquefaction. The treatment system comprises a desulfurization and deamination unit, a dephenolization unit, a first oxidation unit, a first biochemical treatment unit, a second oxidation unit, a second biochemical treatment unit and a desalination unit. unit; the invention also discloses a corresponding sewage treatment method. The present invention is aimed at direct coal liquefaction sewage, and the oil phase, hydrogen sulfide, ammonia and phenolic substances in the sewage are efficiently removed through the desulfurization and deamination unit and the dephenolization unit in sequence, and then the first oxidation unit and the first biochemical treatment unit are used And the second oxidation unit and the second biochemical treatment unit centrally treat the refractory substances in the sewage, which not only effectively reduces the toxicity of sewage and improves the biodegradability of sewage, but also through the cooperation between two different oxidation units and the two The cooperation between two different biochemical treatment units realizes the all-round advanced treatment of difficult-to-treat substances in sewage, and solves the problem of difficult purification and treatment of sewage directly liquefied by coal.
Description
technical field [0001] The invention relates to the field of sewage treatment, in particular to a coal direct liquefaction sewage treatment system and method. Background technique [0002] With the increasingly serious shortage of water resources in our country, especially the green GDP construction vigorously advocated by the state and the proposal of circular economy, it is particularly important for enterprises to save water, reduce emissions and utilize waste water resources. Therefore, how to economically, efficiently and reliably improve the comprehensive utilization rate of water resources of enterprises and even reach the "zero discharge" standard is an important task for enterprises to meet the environmental protection requirements of the state and local governments and establish a responsible image of enterprises. [0003] The Shenhua Coal Direct Liquefaction Project is the first coal direct liquefaction commercial construction project in my country and the world. ...
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IPC IPC(8): C02F9/14C01C1/02
Inventor 张传江杨占军陈茂山刘东明范树军于强段晓军张泽南王伟刘德森许昊高进
Owner CHNA ENERGY INVESTMENT CORP LTD