Device and method for production synthesis gas energy conservation and emission reduction of static bed gas making furnace

Abstract

The invention discloses a system and a method for energy conservation and discharge reduction in a synthesis gas produced in a fixed bed and gas making heater, which solves the problem of a large production of byproduct steam and waste gas from raw material. The system for energy conservation and discharge reduction in a synthesis gas produced in a fixed bed and gas making heater of the invention includes a fixed bed and gas making heater provided with a jacket, wherein insulating refractory material is bushed at an annular area of an inner wall of the gas making heater jacket; material which is resistant to high temperature, wear, thermal shock, slagging and flame is masonried or injected in the annular area of the inner wall of the insulating refractory material and is closed to a hearth; the method of the invention is: 1) raising the wall temperature around a gasification area of the hearth of the gas making heater to over 1000 DEG C; 2) reducing the mixing space of blowy wind and water gas in the gas making heater outside of the heater. The invention has the advantages that by adopting the composite heat insulation and slagging resistant material to be masonried around the gasification area of the hearth of the gas making heater, the surrounding wall temperature reaches over 1000 DEG C, thus reducing the amount of the byproduct steam of the water jacket, lowering slag and carbon residue from the gas making heater, and improving steam resolution ratio of the gasification.

Description

technical field [0001] The invention relates to an energy-saving and emission-reducing device and method for producing synthetic gas by a fixed-bed gas-making furnace. Background technique [0002] According to actual tests, the currently commonly used fixed-bed batch gas-making furnace is close to the water jacket. Due to the cooling effect of the water jacket, the temperature of the raw coal seam in the 80mm ring area around the inner wall of the water jacket is too low, and the raw coal in this part is far lower than Ignition temperature, resulting in poor combustion heat storage and gasification. The water wall effect of the water jacket in the gasification layer of the gasification furnace not only leads to a high carbon residue in the slag, which is 10-20% or more, but also leads to a low steam decomposition rate during gasification, and there is a large amount of undecomposed carbon in the gas. The water vapor in turn causes the gas-making sewage to expand and discha...

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Problems solved by technology

[0002] According to actual tests, the currently commonly used fixed-bed batch gas-making furnace is close to the water jacket. Due to the cooling effect of the water jacket, the temperature of the raw coal seam in the 80mm ring area around the inner wall of the water jacket is too low, and the raw coal in this part is far lower than Ignition temperature, resulting in poor combustion heat storage and gasification

The water wall effect of the water jacket in the gasification layer of the gasification furnace not only leads to a high carbon residue in the slag, which is 10-20% or more, but also leads to a low steam decomposition rate during gasification, and there is a large amount of undecomposed carbon in the gas. Water vapor in turn causes gas generation sewage to expand and discharge

[0003] The above reasons not only lead to the production of syngas by the fixed-bed batch gas-making furnace currently in operation, but also use high-priced anthracite coal to by-produce a large amount of steam, and also produce a large amount of pollutants, which not only pollute the environment, but also cause the enterprise's failure. poor economic performance

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