A method and device for blowing waste flue gas from a hot blast stove to a smelting reduction furnace
A reduction furnace and hot air blowing technology, applied in waste gas treatment, climate sustainability, improvement of process efficiency, etc., can solve problems such as poor heat transfer effect, inability to reduce CO2 emissions, and energy waste
Active Publication Date: 2022-06-03
内蒙古赛思普科技有限公司
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Problems solved by technology
Although this process reduces production costs, it cannot reduce CO2 emissions and will cause damage to the environment on which human beings depend.
At the same time, a large amount of N2 is brought into the oxygen-enriched hot air to absorb the heat after combustion in the furnace. The high-temperature N2 has poor heat exchange effect with the molten pool, and is finally discharged out of the furnace, resulting in a waste of energy.
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[0030] In order to make the purposes, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments These are some, but not all, embodiments of the present disclosure. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present disclosure.
[0031] Depend on figure 1 As shown in Example 1 of the present invention, the gas produced by the smelting reduction furnace is burned in the hot blast stove, the waste flue gas produced by the hot blast stove is desulfurized, mixed with pure oxygen, and then introduced into the hot blast stove through the cold air pipe for heating, and...
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The invention discloses a method and a device for blowing waste flue gas of a hot blast furnace into a smelting reduction furnace. It can effectively solve the problem of saving energy and reducing CO in smelting reduction furnace ironmaking 2 emission. And use a large amount of high temperature CO 2 Strong radiation characteristics, enhance the heat exchange efficiency between the combustion zone in the furnace and the molten iron pool, and reduce the N 2 The heat outside the furnace is brought out, which improves the production efficiency and reduces the waste of energy. The technical solution is to contain CO 2 or contain CO 2 The mixed gas mixed with waste flue gas and pure oxygen is heated by the hot blast stove, and the heated mixed gas is sprayed into the smelting reduction furnace through the hot blast pipe, and the O injected into the combustion zone of the furnace 2 Combustion reaction with pulverized coal and combustible gases from molten pool. newly generated CO 2 with the introduced CO 2 Mixing, so that the furnace contains a large amount of high-temperature CO with radiation characteristics 2 Exchange heat with the rising slag and molten iron in the molten pool, and finally bring the heat back to the molten pool, so as to realize the injection of waste gas from the hot blast furnace into the smelting reduction furnace.
Description
technical field [0001] The invention relates to a technology for energy saving and emission reduction of ironmaking in a smelting reduction furnace, and relates to a method and a device for spraying waste flue gas of a hot blast furnace into the smelting reduction furnace. Background technique [0002] At present, the iron-making process technology of smelting reduction furnaces around the world adopts the method of injecting oxygen-enriched hot air into the smelting reduction furnace, so that the injected hot air and the coal powder and gas rising from the molten pool undergo a combustion reaction, and the generated heat can The molten pool is heated. Although this process reduces production costs, it cannot reduce CO2 emissions and will cause damage to the environment on which human beings live. At the same time, a large amount of N2 is brought into the oxygen-enriched hot air to absorb the post-combustion heat in the furnace. The high-temperature N2 has poor heat exchang...
Claims
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IPC IPC(8): C21B13/00
CPCC21B13/00C21B2100/80Y02P10/25
Inventor 孟凡旭徐涛周海川张勇卜二军任俊昝智程鹏陈涛张志宇
Owner 内蒙古赛思普科技有限公司