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Coal gasification wastewater treatment device and treatment method thereof

A technology of coal gasification wastewater and treatment device, which is applied in chemical instruments and methods, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of long hydraulic retention time, long reaction process and high treatment cost , to achieve the effect of short hydraulic retention time, high biological activity and high denitrification efficiency

Active Publication Date: 2013-08-21
YANKUANG GRP CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the treatment of domestic coal gasification wastewater generally adopts a combination of physical and chemical treatment and biological treatment. Specifically, the denitrification of wastewater is realized through the whole process of nitrification and denitrification in biological treatment technology. The reaction process is long, the treatment cost is high, and the hydraulic retention time Long, some treatment processes need to add a large amount of alkali and carbon source to maintain the normal progress of biochemical reactions

Method used

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  • Coal gasification wastewater treatment device and treatment method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] The volume of the first biological oxidation tank 31 is equal to that of the second biological oxidation tank 32, and the volume of the third biological oxidation tank 33 accounts for 25% of the total volume of the device;

[0051] The first carrier 21, the second carrier 22 and the third carrier 23 are polyurethane porous cubes, the average side length of the first carrier 21 and the second carrier 22 is 30mm, and the average aperture range is 1~4mm, and the side length of the third carrier 23 is 20mm, the aperture range is 1-2mm, the side length of the fourth carrier 24 is 40mm, and the aperture is 4-7mm;

[0052] In the specific implementation process, the coal gasification wastewater is first pretreated by the regulating tank and the physical and chemical sedimentation tank to remove part of the suspended solids, and then divided into three parts by the main water inlet, and enters the first water inlet 11 and the second water inlet simultaneously in proportion. 12 ...

Embodiment 2

[0063] The volume of the first biological oxidation tank 31 is equal to that of the second biological oxidation tank 32, the volume of the third biological oxidation tank 33 accounts for 20% of the total volume of the device, and the dissolved oxygen concentration control device includes an aeration pipe 6 and a centrifugal fan;

[0064] The first carrier 21, the second carrier 22 and the third carrier 23 are polyurethane porous cubes, the average side length of the first carrier 21 and the second carrier 22 is 30mm, and the average aperture range is 1~4mm, and the side length of the third carrier 23 is 20mm, the aperture range is 1-2mm, the side length of the fourth carrier 24 is 40mm, and the aperture is 4-7mm;

[0065] In the specific implementation process, the coal gasification wastewater is first pretreated by the regulating tank and the physical and chemical sedimentation tank to remove part of the suspended solids, and then divided into three parts by the main water inl...

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Abstract

The invention discloses a coal gasification wastewater treatment device. When the treatment device is used, the coal gasification wastewater of which partial suspended matters are removed by a regulating pool and a physical and chemical sedimentation pool enters a first biological oxidation pool from a first water inlet; after a short-range nitrification and denitrification reaction is performed on the coal gasification wastewater through a first carrier for the first time, the coal gasification wastewater flows into a second biological oxidation pool from a first channel; after the secondary short-range nitrification and denitrification reaction is performed on the coal gasification wastewater through a second carrier, the coal gasification wastewater flows into a third biological oxidation pool from a second channel; a denitrification reaction is performed through a third carrier and then a nitrification reaction is performed through a fourth carrier; and the coal gasification wastewater is discharged from a water pipe after the treatment process is finished, wherein the nitrification reaction is controlled at the nitrite stage during the short-range nitrification and denitrification reaction, so that the denitrification reaction is performed directly under the condition that nitrite is not further oxidized into nitrate; and thus the wastewater denitrification process is shortened. A supplementing device is used for supplementing a carbon source and alkalinity. The invention further provides a coal gasification wastewater treatment method.

Description

technical field [0001] The invention relates to the technical field of coal gasification wastewater treatment, in particular to a coal gasification wastewater treatment device and a treatment method thereof. Background technique [0002] With the sustained and rapid development of my country's economy, the demand for energy and chemical products has shown a relatively high growth rate, and the position of coal chemical industry in the field of energy and chemical industry in my country has become increasingly prominent. Coal gasification is one of the core technologies of coal chemical industry, which is widely used in industrial processes such as coal gasification, synthetic ammonia, and coal power generation. [0003] Coal gasification wastewater is the wastewater produced by the gasifier in the process of producing coal gas or replacing natural gas. It is a typical industrial organic wastewater with high concentration, high pollution, toxicity and refractory degradation. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
Inventor 王冬周如禄赵忠萍郭中权徐先宝郑彭生陈聚武宋淑群王伟秦胜袁建奎岳双喜石金田
Owner YANKUANG GRP CO LTD
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