Coal-to-oil synthetic wastewater treatment system and process

A wastewater treatment system and coal-to-oil technology, applied in natural water treatment, water/sewage treatment, water/sewage multi-stage treatment, etc., can solve the problems of environmental pollution, high oil content, waste of water resources, etc. Benefit, prolong the adsorption time, reduce the effect of COD

Inactive Publication Date: 2019-10-18
内蒙古晶泰环境科技有限责任公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Coal gasification products CO and H in the production process of indirect coal liquefaction 2 The wastewater produced in the stage of synthetic fuel oil is synthetic wastewater, which mainly contains short-chain alcohols, acids, aldehydes and other organic substances. The COD is generally as high as 15-20mg / L, the pH is as low as 2.0-3.5, and the oil content is high. At present, there is no device that can effectively treat this kind of synthetic wastewater. Therefore, it is directly discharged, which has caused great pollution to the environment and caused a waste of water resources.

Method used

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  • Coal-to-oil synthetic wastewater treatment system and process
  • Coal-to-oil synthetic wastewater treatment system and process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Such as figure 1 , figure 2 The shown coal-to-oil synthetic wastewater treatment system includes a regulating tank 1, an oil removal device 2, a UASB reactor 3, an A / O pool 4, a secondary sedimentation tank 5, and an alkali addition unit 6;

[0032] The liquid outlet of the regulating tank 1 is connected with the inlet 2-2 of the degreasing tank 2-1 of the degreasing device 2, the water outlet 2-3 of the degreasing tank 2-1 is connected with the water inlet of the UASB reactor 3, and the UASB reacts The liquid outlet of device 3 is communicated with the water inlet of A / O pool 4, and the liquid outlet of A / O pool 4 is communicated with the water inlet of secondary sedimentation tank 5, and the mud outlet of secondary sedimentation tank 5 is connected with degreasing tank 2- The entrance of 1 is connected to 2-2;

[0033] Alkali adding unit 6 comprises lye tank 6-1, the liquid outlet of lye tank 6-1 communicates with one end of dosing pipe 6-2, and the other end of do...

Embodiment 2

[0043] Utilize the coal-to-oil synthetic wastewater treatment system described in Example 1 to treat the coal-to-oil synthetic wastewater, including the following steps: step one acid-base adjustment; step two oil removal; step three anaerobic treatment; step four anaerobic aerobic treatment; Process five settlement treatment; where:

[0044] Process 1 acid-base adjustment: Send the synthetic wastewater with a pH value of 3.5, a COD of 15000 mg / L, and an oil content of 50 mg / L to the adjustment pool 1 of the coal-to-oil synthetic wastewater treatment system, and add The lye is used to adjust the acid and alkali of the synthetic wastewater to obtain the adjusted wastewater with a pH value of 5;

[0045] Process 2 Degreasing: Send the adjusted wastewater obtained in the process 1 acid-base adjustment to the degreasing pool 2-1 of the coal-to-oil synthetic wastewater treatment system for degreasing treatment, and add sludge to the degreasing pool 2-1 , through the adsorption of ...

Embodiment 3

[0051] Utilize the coal-to-oil synthetic wastewater treatment system described in Example 1 to treat the coal-to-oil synthetic wastewater, including the following steps: step one acid-base adjustment; step two oil removal; step three anaerobic treatment; step four anaerobic aerobic treatment; Process five settlement treatment; where:

[0052] Process 1 Acid-base adjustment: Send the synthetic wastewater with a pH value of 3, a COD of 17000 mg / L, and an oil content of 60 mg / L to the adjustment tank 1 of the coal-to-oil synthetic wastewater treatment system, and add alkali to the adjustment tank 1 The synthetic wastewater is acid-base adjusted, acid-base adjusted, and the adjusted wastewater with a pH value of 4.7 is obtained;

[0053] Process 2 degreasing: send the regulated wastewater obtained in the process 1 acid-base adjustment to the degreasing pool 2-1 of the coal-to-oil synthetic wastewater treatment system, add sludge to the degreasing pool 2-1, and pass the sludge Ads...

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Abstract

The invention discloses a coal-to-oil synthetic wastewater treatment system. The coal-to-oil synthetic wastewater treatment system comprises a regulating tank, a degreasing device, a UASB reactor, anA/O pool, a secondary sedimentation tank and an alkali adding unit; the coal-to-oil synthetic wastewater treatment system has a simple structure and stable operation, is safe and reliable, has low operating costs, avoids environmental damage caused by external discharge of synthetic wastewater, and has great social benefits; and economic benefits of enterprises can be effectively improved, and great popularization value is achieved. The invention further discloses a coal-to-oil synthetic wastewater treatment process. The coal-to-oil synthetic wastewater treatment process comprises the following steps of step one, acid-base regulation, step two, degreasing, step three, anaerobic treatment, step four, anaerobic and aerobic treatment, and step five, sedimentation treatment. The coal-to-oil synthetic wastewater treatment process can realize recycling of water resources and save the water resources; and settled sludge generated by sedimentation is reused in a grease removal tank, and greaseremoval is performed through adsorption of the settled sludge.

Description

Technical field: [0001] The invention relates to the field of coal-to-oil synthetic wastewater treatment, in particular to a coal-to-oil synthetic wastewater treatment system and a process thereof. Background technique: [0002] Coal-to-liquids is a technology that uses coal as raw material to produce oil products and petrochemical products through chemical processing, including direct coal liquefaction and coal indirect liquefaction. Coal gasification products CO and H in the production process of indirect coal liquefaction 2 The wastewater produced in the stage of synthetic fuel oil is synthetic wastewater, which mainly contains short-chain alcohols, acids, aldehydes and other organic substances. The COD is generally as high as 15-20mg / L, the pH is as low as 2.0-3.5, and the oil content is high. At present, there is no device that can effectively treat this kind of synthetic wastewater. Therefore, the method of direct discharge is adopted, which causes great pollution to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F101/30C02F101/34C02F103/36
CPCC02F9/00C02F1/66C02F1/40C02F1/281C02F3/2846C02F3/30C02F2001/007C02F2101/30C02F2101/34C02F2103/365
Inventor 党安年刘艳梅潘文刚闫青丽田力乔宇王志平陆魁张世奇南云杰
Owner 内蒙古晶泰环境科技有限责任公司
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