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Recovery device and method for heat and moisture of blast furnace granulating slag steam

A blast furnace water slag and recovery device technology, applied in the direction of recycling technology, process efficiency improvement, etc., can solve the problems of easily corroded equipment, heat and water recovery difficulties of water slag steam, etc., so as to reduce the corrosion of equipment and reduce harmful effects. Substance and visible vapour emissions, effect of reducing corrosion

Pending Publication Date: 2020-04-07
CISDI SHANGHAI ENG CO LTD
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Problems solved by technology

[0003] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a recovery device and method for recovering heat and moisture of blast furnace slag steam, which is used to solve the difficulties and difficulties in recovering heat and moisture of slag steam in the prior art. Corrosion equipment and other issues

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  • Recovery device and method for heat and moisture of blast furnace granulating slag steam
  • Recovery device and method for heat and moisture of blast furnace granulating slag steam
  • Recovery device and method for heat and moisture of blast furnace granulating slag steam

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Embodiment 1

[0051] The first blast furnace has a daily output of 3000t / d red slag, 12 slag discharges per day, an average output of about 250t / h, a temperature of about 1450°C, a specific heat capacity of red slag of 1.2KJ / kg K, a granulation water of 1900t / h, an inlet water temperature of 40°C, and a granulation The final water temperature is 90°C, and the water slag temperature is 90°C. Calculating the steam generation of water slag, the steam temperature is about 120°C, the heat enthalpy is 2700kJ / kg, the flow rate is about 3.33t / h, and the volume flow rate is about 5831.9m 3 / h, equivalent to about 4051.2Nm in the standard state 3 / h, the total heat carried by the steam is about 9×10 6 kJ / h. Since the water slag granulation tower 51 is not a closed device, a large amount of air is involved under the natural draft of the high-altitude chimney. The injection device 6 adopts a steam injection fan, and the flow rate of the steam injection fan is set to 7000m 3 / h, the boost pressure i...

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Abstract

The invention relates to the technical field of environmental protection and energy conservation of blast furnaces, in particular to a recovery device and method for the heat and moisture of blast furnace granulating slag steam. The recovery device comprises a granulating slag steam distributor and a granulating slag steam recovery tower, wherein the granulating slag steam recovery tower comprisesat least one water bath pool; a steam ejector is arranged in the water bath pool; and the steam ejector is communicated with the outlet end of the granulating slag steam distributor through a first branch pipe. The device and the method have the beneficial effects that heat and moisture of granulating slag steam are recycled, emission of harmful substances and visible steam is reduced, corrosionto equipment is reduced, and environmental protection is better realized.

Description

technical field [0001] The invention relates to the technical field of blast furnace environmental protection and energy saving, in particular to a device and method for recovering steam heat and moisture of blast furnace slag. Background technique [0002] The main products of ironmaking blast furnaces are molten iron, blast furnace gas, etc., and one of the by-products is high-temperature slag (above 1400°C). The mainstream slag treatment process is water quenching granulation, which produces a large amount of water vapor, usually in the water slag granulation pool Or a high-altitude chimney is installed on the upper part of the water slag granulation tower, and water vapor mixed with a large amount of air is discharged into the atmosphere at high altitude under the action of the natural suction of the chimney. The water slag vapor discharged at high altitude not only takes away heat, but also carries a large amount of water, wastes water resources, and corrodes blast furn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B3/06C21B3/08
CPCC21B3/06C21B3/08C21B2400/024C21B2400/08Y02P10/20Y02W30/50
Inventor 张玉栋邹忠平董会国张少魁范志刚
Owner CISDI SHANGHAI ENG CO LTD
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