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Heat recovering technique for synthetic gas production process by coal gasification

A technology of heat recovery and process method, applied in the chemical industry, sustainable manufacturing/processing, petroleum industry, etc., can solve the problems of reducing the heat transfer efficiency of radiant coolers, improve the utilization value, expand the scope of application, and reduce consumption Effect

Active Publication Date: 2008-04-16
WISON ENG
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this heat recovery method, the molten ash is easy to stick on the surface of the water cooling wall or the surface of the water pipe wall, which will reduce the heat transfer efficiency of the radiant cooler in severe cases

Method used

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  • Heat recovering technique for synthetic gas production process by coal gasification
  • Heat recovering technique for synthetic gas production process by coal gasification

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Embodiment Construction

[0035] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0036] Taking a gasification furnace with a coal processing capacity of 35 tons / hour as an example, referring to Fig. 1, the coal gasification furnace 1 of the device is provided with a gasification chamber 5 and a quenching chamber 4; in the transition connection between the gasification chamber and the quenching chamber The section is provided with a first-stage chiller 7, and the first-stage chiller 7 is composed of 20 atomizing nozzles. The synthesis gas produced by the gasification chamber 5 has a pressure of 6.5MPa and a temperature of 1250-1350°C. It enters the primary chiller 7 from the outlet 6 of the gasification chamber, and the primary chiller 7 sprays chilled water into the In the stream of synthesis gas, this can make the synthesis gas be cooled uniformly and rapidly, so as to avoid the agglomeration of slag. The gas and ash go down the d...

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Abstract

The invention discloses a heat recovery technological method for making synthetic gas during coal gasification, including the following steps: the high-temperature synthetic gas and the scoria are generated inside the vaporizer of a coal gasification furnace; chill water is sprayed into the outlet of the furnace through a primary chiller to chill the synthetic gas and the scoria below ash fusion point T1; the chilled synthetic gas and scoria are fed into a first steam generator, a steam superheater and a second steam generator for reclaiming the afterheat of the synthetic gas; moreover, part fine clinker is removed through a dust separator and residual fine clinker is removed inside a secondary chiller after further heat recovery through a boiler feeding preheater; meanwhile, the synthetic gas is humidified and then is fed into a next process unit. The invention increases the unitization value of recycled heat energy and prevents scoria from solidifies on the tube wall of the first steam generator, thereby further reducing energy consumption of equipment.

Description

technical field [0001] The invention relates to a coal gasification process, in particular to a heat recovery process for producing synthetic gas from coal gasification. Background technique [0002] Coal is the fossil energy with the most reserves and the widest distribution in the world. Against the background of high oil prices, the price comparison advantage of coal resources is becoming more and more obvious, and the mineable reserves and mining life of coal in the world are significantly greater than that of oil and natural gas. This provides good conditions for the coal chemical industry. development environment. The clean and efficient utilization of coal is a major technical issue in the field of energy and environmental protection today, and it is also one of the key technologies for the sustainable development of my country's national economy. [0003] In the past two decades, many foreign companies have carried out research and development on coal gasification c...

Claims

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Application Information

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IPC IPC(8): C10J3/86
CPCY02E20/18Y02P20/10
Inventor 方邦吾李保有邹永胜赵丙国
Owner WISON ENG
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