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Direct coal liquefaction sewage treatment system and method

A sewage treatment system, a technology for direct coal liquefaction, which is applied in the fields of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc.

Active Publication Date: 2016-02-17
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Direct coal liquefaction sewage treatment system and method
  • Direct coal liquefaction sewage treatment system and method
  • Direct coal liquefaction sewage treatment system and method

Examples

Experimental program
Comparison scheme
Effect test

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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PUM

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Abstract

The invention discloses a direct coal liquefaction sewage treatment system. 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 desalination unit. The invention further discloses a corresponding sewage treatment method. According to the direct coal liquefaction sewage treatment system and method, for direct coal liquefaction sewage, an oil phase, hydrogen sulfide, ammonia and phenolic substances in the sewage are efficiently removed through the desulfurization and deamination unit and the dephenolization unit sequentially, and then centralized treatment is performed on substances difficult to treat in the sewage through the first oxidation unit, the first biochemical treatment unit, the second oxidation unit and the second biochemical treatment unit; the sewage toxicity is effectively lowered, and the biodegradability of the sewage is improved; especially, through cooperation of the two different oxidation units and cooperation of the two different biochemical treatment units, comprehensive deep treatment on the substances difficult to treat in the sewage is achieved, and the problem that the direct coal liquefaction sewage is difficult to purify and treat is solved.

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. ...

Claims

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Application Information

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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