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Coal gasification waste heat recovery system

A waste heat recovery system and coal gasification technology, applied in the direction of gasification process, gasification device mechanical details, gasification device feeding tools, etc., can solve the problems of low energy utilization efficiency of wet purification and complicated operation of dry purification equipment , to achieve the effect of ensuring long-term stable operation, simple and feasible ash discharge and slag collection system, and convenient operation

Inactive Publication Date: 2015-01-07
中国东方电气集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the above defects in the prior art, the present invention provides a coal gasification waste heat recovery system, which overcomes the defects of low energy utilization efficiency of wet purification and complicated operation of dry purification equipment, and has high energy utilization efficiency , simple and reliable operation

Method used

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  • Coal gasification waste heat recovery system
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Embodiment 1

[0027] A coal gasification waste heat recovery system, comprising a gasification furnace 1, a cyclone separator 2 and a waste heat boiler 3, the gasification furnace 1 includes an air intake chamber 10 and a quenching chamber 11, and the air intake chamber 10 is located above the quenching chamber 11 , the cyclone separator 2 comprises an air inlet 20, an air outlet 21 and an ash outlet 22, the air inlet 20 is connected above the refrigerant liquid level 12 in the quenching chamber 11 through a syngas conduit 5, and the air outlet 21 It is connected to the waste heat boiler 3 through pipelines, and the ash outlet 22 is connected below the liquid level of the quenching agent 12 in the quenching chamber 11 through the ash collecting conduit 7, and the temperature of the gas after quenching is controlled at 400°C.

[0028] The connecting end of the ash collecting duct 7 and the ash outlet 22 is provided with a "U" shaped material leg 8, the "U" shaped material leg 8 has three open...

Embodiment 2

[0034] A coal gasification waste heat recovery system, comprising a gasification furnace 1, a cyclone separator 2 and a waste heat boiler 3, the gasification furnace 1 includes an air intake chamber 10 and a quenching chamber 11, and the air intake chamber 10 is located above the quenching chamber 11 , the cyclone separator 2 comprises an air inlet 20, an air outlet 21 and an ash outlet 22, the air inlet 20 is connected above the refrigerant liquid level 12 in the quenching chamber 11 through a syngas conduit 5, and the air outlet 21 It is connected to the waste heat boiler 3 through pipelines, and the ash outlet 22 is connected below the liquid level of the quenching agent 12 in the quenching chamber 11 through the ash collecting conduit 7, and the temperature of the gas after quenching is controlled at 500°C.

[0035] The connecting end of the ash collecting duct 7 and the ash outlet 22 is provided with a "U" shaped material leg 8, the "U" shaped material leg 8 has three open...

Embodiment 3

[0041] A coal gasification waste heat recovery system, comprising a gasification furnace 1, a cyclone separator 2 and a waste heat boiler 3, the gasification furnace 1 includes an air intake chamber 10 and a quenching chamber 11, and the air intake chamber 10 is located above the quenching chamber 11 , the cyclone separator 2 comprises an air inlet 20, an air outlet 21 and an ash outlet 22, the air inlet 20 is connected above the refrigerant liquid level 12 in the quenching chamber 11 through a syngas conduit 5, and the air outlet 21 It is connected to the waste heat boiler 3 through pipelines, and the ash outlet 22 is connected below the liquid level of the quenching agent 12 in the quenching chamber 11 through the ash collecting conduit 7, and the temperature of the gas after quenching is controlled at 600°C.

[0042] The connecting end of the ash collecting duct 7 and the ash outlet 22 is provided with a "U" shaped material leg 8, the "U" shaped material leg 8 has three open...

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Abstract

The invention relates to a coal gasification waste heat recovery system which comprises a gasifier, a cyclone separator and a waste heat boiler, wherein the gasifier comprises a gas inlet chamber and a chilling chamber; the gas inlet chamber is positioned above the chilling chamber; the cyclone separator comprises a gas inlet, a gas outlet and an ash outlet; the gas inlet is connected to the upper side of a chilling agent liquid level in the chilling chamber through a synthesis gas guide tube; the gas outlet is connected to the waste heat boiler through a pipeline; the ash outlet is connected to the lower side of the chilling agent liquid level in the chilling chamber through an ash collection guide tube; and the temperature of the chilled gas is controlled to be 400-900 DEG C. The waste heat recovery system overcomes the defects that the wet-process purified energy utilization efficiency is low and the dry-process purification equipment is complex to operate, the energy utilization efficiency is high, and the operation is simple and reliable.

Description

technical field [0001] The invention relates to a coal gasification equipment, in particular to a system for recovering waste heat of coal gasification. Background technique [0002] As national energy regulations become more and more stringent, improving energy utilization efficiency will be a major problem facing coal chemical projects in the future. During the "Twelfth Five-Year Plan" period, new coal-to-natural gas, coal indirect liquefaction, and coal-to-olefin energy conversion projects will be launched. The efficiency reaches 56%, 42%, and 40% respectively. At the same time, the "Coal Deep Processing Demonstration Project Planning" compiled by the National Development and Reform Commission and the National Energy Administration also pointed out that one of the three rigid indicators for whether coal deep processing demonstration projects can be approved in the future is energy utilization efficiency, and some demonstration projects must reach or exceed " "Advanced va...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10J3/00C10J3/84C10J3/86
CPCC10J3/00C10J3/84C10J3/86C10J2200/09C10J2200/15C10J2300/093C10J2300/1603C10J2300/1643Y02P20/10Y02P20/129
Inventor 刘四威陈慧陈鹏王晓亮吴家桦
Owner 中国东方电气集团有限公司