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Coal gasification wastewater treatment method

A treatment method, waste water technology, applied in water/sewage treatment, natural water body treatment, chemical instruments and methods, etc., can solve problems such as high COD value, reduce the economic efficiency of coal gasification process, and fail to meet environmental protection emissions, etc., to achieve reduction Wastewater treatment cost, save wastewater treatment process, good adsorption effect

Active Publication Date: 2015-03-25
ENN SCI & TECH DEV
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  • Claims
  • Application Information

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Problems solved by technology

Because coal gasification wastewater contains pollutants such as tar and phenol ammonia, the COD value is high, and there is a strong odor of phenol and amine, so the treatment is difficult
[0004] At present, the treatment process of coal gasification wastewater mainly includes gas-water separation, oil removal, acid gas removal, phenol recovery, ammonia recovery, and biochemical treatment. However, the COD value of coal gasification wastewater treated by the above processes is still high, reaching If it does not meet the requirements of environmental protection emissions, advanced treatment is required, the process is cumbersome and costly, which reduces the economical efficiency of the coal gasification process

Method used

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Examples

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Embodiment 1

[0050] The raw coal a absorbs the tar and phenol ammonia in the gasification wastewater, and then loads it with the alkali metal catalyst recovered from the wastewater, and then enters the gasifier for gasification. The process conditions are 3.5Mpa and 700°C. The experimental results show that the carbon conversion rate is 88%, the gas composition is: H 2 : 44.5%, CO 2 : 32.5%, CO: 7.2%, CH 4 : 15.8%.

Embodiment 2

[0054] The raw coal a absorbs the tar and phenol ammonia in the gasification wastewater, and then loads it with the alkali metal catalyst recovered from the wastewater, and then enters the gasifier for gasification. The process conditions are 3.5Mpa and 750°C. The experimental results show that the carbon conversion rate 92%, the gas composition is: H 2 : 44.9%, CO 2 : 23.7%, CO: 8.9%, CH 4 : 22.5%.

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Abstract

The embodiment of the invention provides a coal gasification wastewater treatment method, and belongs to the field of the treatment of coal gasification wastewater, so as to improve the overall efficiency of the coal gasification treatment. The coal gasification wastewater treatment method comprises the following steps: adsorbing and filtering the gasification wastewater by virtue of pulverized coal to obtain a wastewater solution containing few impurities and pulverized coal adsorbed with many impurities; washing gasification coal cinders by virtue of the wastewater solution to obtain a wastewater solution containing an alkali metal catalyst; mixing, loading and drying the wastewater solution containing the alkali metal catalyst and the pulverized coal containing many impurities, and feeding a mixture into a gasification furnace to generate effective gas through reaction. The treatment method disclosed by the invention is applicable to the treatment of the coal gasification wastewater.

Description

technical field [0001] The invention relates to the field of coal gasification wastewater treatment, in particular to a coal gasification wastewater treatment method. Background technique [0002] With the increasing shortage of oil and natural gas resources in the world, coal-based energy conversion technology represented by coal gasification has become the focus of increasing attention of countries all over the world. In particular, China is rich in coal and poor in oil, and the geographical distribution of coal resources is uneven. Therefore, the development of efficient and clean coal gasification technology has long-term significance for ensuring national energy security and economic development. [0003] Coal gasification process is an important part of the coal chemical industry, specifically refers to the process of producing reaction gas by thermochemical reaction between coal and gasification agent under high temperature conditions. The coal gasification process w...

Claims

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Application Information

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IPC IPC(8): C10J3/46C02F9/10
CPCC10J3/54C02F1/02C02F1/283C02F9/00C02F2103/34C10J2300/093C10J2300/169
Inventor 裴增楷郑岩金亚丹李克忠毕继诚
Owner ENN SCI & TECH DEV
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