Incineration waste heat recovery device for blast furnace gas
A waste heat recovery device, blast furnace gas technology, applied in the direction of incinerators, combustion methods, combustion types, etc., can solve the problems of low theoretical combustion temperature, waste of resources, difficulty in ignition, etc., achieve good economic benefits, reduce exhaust gas temperature, improve The effect of effective utilization
Inactive Publication Date: 2015-08-12
JIANGSU JINYUAN TENGFENG HEAT EXCHANGE EQUIP CO LTD
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Problems solved by technology
Because the blast furnace gas contains a large amount of nitrogen and carbon dioxide, the theoretical combustion temperature is low, and it is difficult to catch fire, which makes the emission rate of blast furnace gas in many iron and steel enterprises high, resulting in a waste of resources
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Embodiment 1
[0012] This embodiment is a blast furnace gas incineration waste heat recovery device, such as figure 1 As shown, including the combustion furnace, the air inlet of the combustion furnace is connected with the blast furnace gas pipeline and the synthesis gas pipeline, the blast furnace gas pipeline is equipped with a heat exchanger and the cyclone dust collector, and the synthesis gas pipeline is also connected with the semi-water gas pipeline, and in The synthesis gas pipeline is equipped with a purge gas buffer tank and a purge gas safety water seal; the high-temperature exhaust port of the combustion furnace is connected to the steam superheater through the pipeline, and the gas outlet of the steam superheater is connected to the waste heat boiler; the high-temperature gas outlet of the waste heat boiler It is connected to the medium-temperature air preheater, soft water heater and low-temperature air preheater in sequence through pipelines. Both the low-temperature air preh...
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The invention provides an incineration waste heat recovery device for blast furnace gas. The incineration waste heat recovery device comprises a combustion furnace, wherein a gas inlet of the combustion furnace is connected to a blast furnace gas pipeline and a synthesis gas pipeline; a heat exchanger is arranged on the blast furnace gas pipeline; a high-temperature smoke vent of the combustion furnace is connected to a steam superheater through a pipeline; an air outlet of the steam superheater is connected to a waste heat boiler; a high-temperature air outlet of the waste heat boiler is connected to an intermediate temperature air preheater, a soft water heater and a low-temperature air preheater in sequence through pipelines; after cooling and dust removal are carried out on the hot blast introduced from the low-temperature air preheater through a sprayer, the hot blast is conveyed to a chimney through a draft fan and is emptied. According to the incineration waste heat recovery device, the gradient utilization of energy is implemented, the heat exchange loss of a flue gas-air heat exchange system and a flue gas-coal gas heat exchange system can be reduced, and the effective utilization ratio of the waste heat of the blast furnace gas is improved; through the blast furnace gas, the overheating steam used for subsequent production is produced; meanwhile, the smoke exhaust temperature is further reduced, the waste heat of the blast furnace gas is recycled to a greater extent, and the incineration waste heat recovery device has better economic benefits.
Description
Technical field [0001] The invention relates to a waste heat recovery device, specifically a waste heat recovery device from blast furnace gas incineration, which belongs to the technical field of waste heat recovery. Background technique [0002] Blast furnace gas is a by-product produced during the iron-making process. Its main components are: carbon monoxide, carbon dioxide, nitrogen, hydrogen, methane, etc. Among them, the combustible components carbon monoxide and hydrogen account for about 30%. It is a gaseous fuel with low calorific value and can be used It is used for self-use gas of metallurgical enterprises, such as heating hot-rolled steel ingots, preheating ladles, etc. Since blast furnace gas contains a large amount of nitrogen and carbon dioxide, the theoretical combustion temperature is low and ignition is difficult, which causes the emission rate of blast furnace gas in many steel companies to be high, resulting in a waste of resources. Therefore, how to mak...
Claims
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IPC IPC(8): F22B1/00F23G7/06F23L15/00C21B7/22
CPCY02E20/34
Inventor 李明祥朱冬宏陈道祥
Owner JIANGSU JINYUAN TENGFENG HEAT EXCHANGE EQUIP CO LTD