Heating control method for constant pressure gas blending coke oven
A technology of heating control and coke oven, which is applied in the heating of coke ovens, combustible gas heating coke ovens, coke ovens, etc. It can solve the problems of timely adjustment of mixing volume and flue suction, frequent work, heating order, and natural environmental pollution, etc. problems, to achieve the effect of promoting environmental protection, alleviating gas emission, and significant social benefits
Active Publication Date: 2014-10-22
宣化钢铁集团有限责任公司
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Problems solved by technology
Manually increasing or decreasing the given value control not only works frequently, but also cannot timely adjust the blending amount and flue suction according to the pressure change of coke oven gas, and the adjustment lag is arbitrary, resulting in low pressure in the gas pipeline network and gas release, giving normal The heating order and the natural environment cause pollution
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[0050] The present invention proposes a coke oven heating control method for automatic blending of coke oven gas under constant pressure. The method establishes the coke oven gas main pipe pressure, coke oven gas blending amount and blast furnace, heat value ratio of coke oven gas, and blast furnace gas flow rate. The mathematical model provides the calculation formula of the coke oven gas blending amount and the corresponding blast furnace gas flow rate setting value after coke oven gas is mixed.
[0051]The first method of this method is to consider the blending principle of coke oven gas; the second is to effectively combine the pressure of the main pipe with the flow rate of coke oven gas blending to avoid gas release due to excessive pressure; the third is to consider the amount of blending The impact of the change on the calorific value of the mixed gas, according to the change of the blending amount and the calorific value, the blast furnace gas flow rate is adjusted acc...
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The invention discloses a heating control method for constant pressure gas blending coke oven, and belongs to the technical field of coke oven heating control method. The method is used to carry out automatic control on coke oven blending heating. The technical scheme comprises the following steps: on-line monitoring the coke oven main pressure, the blast furnace gas flow, the flow of coke oven gas for blending, and the flue suction force; establishing a mathematic formula for calculating the coke oven gas blending flow, calculating the mixing amount of coke oven gas according to the measured data; establishing a mathematic formula for calculating the blast furnace gas flow, calculating the set flow of the blast furnace gas according to the flow of the mixed coke oven gas; establishing a mathematic formula for calculating the sub-flue suction force, and calculating the suction force set values of the machine side sub-flue and the coke side sub-flue of the coke oven according to the percentage of the mixed coke oven gas in the blast furnace gas. The method can adjust the coke oven gas blending amount according to the gas main pressure and the calculation formula, thus the automatic blending heating of coke oven gas is achieved, moreover, the phenomenon of gas dissipation due to the gas overpressure in the pipe network is effectively relieved and at the same time the normal production of coke oven is not affected.
Description
technical field [0001] The invention relates to a heating control method of an automatic mixing coke oven under constant pressure gas, and belongs to the technical field of heating control methods of the coke oven. Background technique [0002] In coking production, coke oven heating control is a key link in coking production. The quality of temperature control will directly affect the normal coking production, coking product quality, coke oven life, energy utilization and environmental protection. . In actual production, the gas flow and pressure of the coking plant are affected by the production conditions of blast furnace gas and coke oven gas user units. Furnace heating gas requires timely switching of heating gas and flexible control of the coke oven gas blending amount to achieve a balanced gas pressure in the pipeline network, reduce large fluctuations in gas pressure, reduce the probability of gas release, and save gas energy. [0003] The following is the calc...
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Inventor 孙风江郭有林李巨兵闫小平李强李祥岳进杜玉海赵瑞新郭永贵
Owner 宣化钢铁集团有限责任公司