Coal gas purifying device

A purification device and gas technology, applied in the direction of combustible gas purification, combustible gas purification/transformation, and production of combustible gas, etc. The effect of convenient maintenance, high flexibility in operation and reduced energy consumption

Active Publication Date: 2011-04-27
CHNA ENERGY INVESTMENT CORP LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Practice has shown that the initial gas purification system using a Venturi scrubber has a high pressure loss, the system is prone to blockage and scaling, and the gas is prone to ash and water, which seriously affects the long-term stable operation of th

Method used

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Embodiment 1

[0026] The chilled pulverized coal pressurized gasification device with a daily processing capacity of 1,000 tons of coal has a gasification pressure of 4.0MPa and a gasification temperature of 1550°C. 73000Nm 3 / h, wet base flow rate is 187500Nm 3 / h, the ash content in dry gas is 7g / Nm 3 . The gas pressure entering the cyclone scrubber is 3.98MPa, the temperature of the circulating gray water is 190°C, and the water volume is 30t / h. The gas is mixed with gray water, and the steam condenses in a small amount of wet gas. The gas enters from the inlet of the cyclone scrubber 1, and under the wetting of the spray water and the centrifugal force, 95% of the gray water containing slag enters the lower liquid storage tank 103 through the downcomer 102 along the inner wall of the cyclone scrubber 3, and the slag water flows from the storage tank. The bottom of the liquid tank 103 is discharged into the slag water treatment system, and the wet gas that removes most of the ash ent...

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PUM

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Abstract

The invention provides a coal gas purifying device, comprising a cyclone scrubber combining cyclone separation and spray washing, a foam scrubber causing a gas outlet at the top of the cyclone scrubber to be communicated with the bottom of the cyclone scrubber by virtue of a first pipeline and a spray tower causing a gas outlet at the top of the foam scrubber to be communicated with the bottom of the foam scrubber by virtue of a second pipeline. The gas purifying device in the invention has the characteristics of simple structure and high operating elasticity, and ensures equipment maintenance to be convenient and long-periodic operation to be stable; the total pressure drop is about 5kPa, thus energy consumption is greatly reduced; and deep purification of gas is realized, so as to ensure the ash content in the purified gas to be less than 1mg/m<3>.

Description

technical field [0001] The invention relates to a coal gas purification device, in particular to a purification device for producing ultra-clean gas by entrained bed gasification. Background technique [0002] Coal gasification technology, especially high-pressure, large-capacity entrained-bed gasification technology, has shown good economic and social benefits and represents a development trend. It is the cleanest coal utilization technology and the leader and key of clean coal technology. The coal gas generated by coal gasification can be used in the production of electricity, steam, motor fuel, coal-based chemicals (synthetic ammonia, methanol, olefins, etc.), hydrogen, etc., but the production of these products puts forward strict requirements on gas purification. Taking integrated gasification combined cycle power generation (IGCC) as an example, if the gas from the gasifier enters the IGCC system without purification, the fine ash and water mist contained in the gas wi...

Claims

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Application Information

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IPC IPC(8): C10K1/00C10K1/10C10J3/84
CPCY02E20/18
Inventor 陈雪莉姚敏焦洪桥张建寿杨红波罗春桃雍晓静刘海峰龚欣
Owner CHNA ENERGY INVESTMENT CORP LTD
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