Device and method for production synthesis gas energy conservation and emission reduction of static bed gas making furnace
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A technology of energy saving and emission reduction, gas making furnace, applied in fixed bed gasification, manufacturing combustible gas, petroleum industry and other directions, can solve the problems of high, residual carbon, polluting the environment, low steam decomposition rate and so on
Inactive Publication Date: 2008-07-16
王子国
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[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%
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Embodiment 1
[0069] In the hot wall high-efficiency gas-making furnace system, Shanxi anthracite (calorific value 28164kJ / kg) is used as raw material, 80% potassium carbonate, 17% sodium acetate, and 3% manganese dioxide are used as catalysts by weight, and the weight of raw coal is 0.6 % Proportion Use the gasification catalyst, add water to the catalyst to form a 30% aqueous solution and spray it on the raw coal into the furnace, and send in the composition containing CH in the upper blowing gas stage 4 36%, H 2 25%, N 2 39% synthetic ammonia releases air at 300Nm3 / h, and the gasification layer temperature is 1000-1250°C.
[0070] After operation analysis and comparison, CH in semi-water gas 4 0.8%, the residual carbon in the slag of the gas-making furnace is reduced to below 7%, and the coal consumption per ton of ammonia is reduced by 162kg.
Embodiment 2
[0072] In the hot wall high-efficiency gas-making furnace system, Shanxi anthracite (calorific value 28164kJ / kg) is used as raw material, 65% of sodium carbonate, 30% of potassium acetate, and 5% of manganese dioxide are used as catalysts by weight, and 0.5% of the weight of raw coal is used. % Proportion Use gasification catalyst, add water to the catalyst to make 40% aqueous solution and spray it on the raw coal into the furnace, and send in components containing CO16%, H 2 20%, CH 4 13%, CH 3 OH1%, CO 2 10%, N 2 40% methanol release air 400Nm3 / h. After operation comparison, the residual carbon in the slag of the gas-making furnace is reduced to less than 6%, and the coal consumption per ton of alcohol is reduced by 196kg.
[0073] On the basis of the above improvements, in order to further save energy and reduce emissions, the following steps are also included, specifically:
[0074] A) co-combustion of sewage pond coal slime, blowing air, coal ash, and gas-making slag...
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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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