Dust collecting and waste heat utilizing system for argon oxygen decarburization furnace

Abstract

The invention relates to a dust collecting and waste heat utilizing system for an argon oxygen decarburization furnace. A smoke guide plate is fixedly installed at the circumference of the argon oxygen decarburization furnace; a slide rail is fixed above the argon oxygen decarburization furnace; the slide rail is slidably connected with a sliding frame trolley; a variable flow roof smoke hood is fixed above the slide rail; the smoke exhaust end port of the variable flow type roof smoke hood is connected with the smoke inlet port of a dust remover; the smoke exhaust port of the dust remover isconnected with the smoke inlet port of a main fan; the smoke exhaust port of the main fan is connected with the smoke inlet port of a smoke exhaust cylinder; smoke suction port covers are arranged above the argon oxygen decarburization furnace and below the slide rail; the smoke exhaust ports of the smoke suction port covers are connected with the smoke inlet port of a waste heat boiler; the smoke exhaust port of the waste heat boiler is connected with the smoke inlet port of a booster fan; and the smoke exhaust port of the booster fan is merged into a pipeline between the smoke exhaust port of the variable flow type roof smoke hood and the smoke inlet port of the dust remover. The dust collecting and waste heat utilizing system for the argon oxygen decarburization furnace has the following advantages: the cooling efficiency is high, the possibility of cloth bag combustion caused by the dust remover is small, and energy source can be recycled.

Description

technical field [0001] The invention relates to an argon-oxygen decarburization furnace dust removal and waste heat utilization system suitable for industries such as metallurgy, building materials, and heating and ventilation. Background technique [0002] The argon oxygen decarburization furnace is called AOD furnace for short, and it includes: roof cover, settling chamber, direct mixed cooling air valve, spray cooler, fan motor, mechanical air cooler, bag filter, water-cooled tight exhaust pipe, electric valve, exhaust barrel and increase the fan, etc. [0003] Roof cover: The main function is to make a large amount of dust-containing hot air flow and soot generated by the AOD furnace in the process of feeding and tapping, that is, the secondary flue gas is stored in the factory frame, and then organized within an appropriate time. take away; [0004] Settling chamber: It is composed of high-alumina bricks and insulation materials, generally in a square shape, and its f...

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Problems solved by technology

[0014] Disadvantages of existing AOD furnaces: 1. Directly mixed cold air: the air volume after cooling increases greatly, and the initial investment and operating costs of system piping, fan motors, and dust collectors need to be increased

2. Water-cooled pipe arrangement method: it requires a large amount of cooling water for cooling, and the heavy pipe weight requires the occupation and configuration of public and auxiliary facilities for cooling water, which is limited by the site

3. The mechanical air cooler method: the cooling effect is poor, and the temperature of the inlet flue gas should not exceed 500°C. The cooling range is limited, and it is easy to block the ash, affect the heat exchange and cause the system to deteriorate

4. Spray cooler method: consumes cooling water and increases the water content in the flue gas, which not only makes the bag of the dust collector easy to condense, but also easily causes the bag to fail in hydrolysis. The control accuracy of the sprayed water is very high, and the cooling range is limited; 5. The cooling time is long and the cooling efficiency is low; 6. The use of power equipment for forced cooling consumes energy; 7. The layout of the water-cooled dense pipe process is not flexible and the consumables are large; 8. The resistance of the cooling equipment is large, which increases the cost of the entire dust removal system Total kinetic energy; 9. The maintenance workload is heavy, and the dust collector is easy to burn the cloth bag; 10. The heat energy of the hot smoke and dust cannot be used, which is wasted and does not generate saturated steam

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