A hot blast stove exhaust air recovery device with an exhaust air buffer tank

Abstract

The invention discloses a waste air recycling device of a hot blast stove with a waste air buffer tank, and belongs to the technical field of the hot blast stove in the metallurgical industry. The waste air recycling device comprises a blast furnace, a hot blast stove, a waste air valve, a cold air pressure-equalizing valve, a waste air buffer tank, a safety valve, a pressure meter, a waste air communicating tube, a waste air communicating tube control valve, a cold air pressure-equalizing slow charging valve, a slow pressure-equalizing communicating tube, a cold air pipeline, a waste air header tube control valve, a waste air header tube, a hot blast stove chimney and a hot air pipeline, wherein a blast furnace air blower is connected with the hot blast stove (2) by a cold air pipeline (12); the hot blast stove (2) and the blast furnace (1) are connected by the hot air pipeline (16); the cold air pressure-equalizing valve (4) is arranged on a pressure-equalizing pipeline of each hot blast stove; the waste air valve (3) is arranged on the waste air pipeline of each hot blast stove; the waste air buffer tank (5) is arranged near the hot blast stove; the waste air communicating tube (8) is arranged for connecting the waste air header tube (14) with the waste air buffer tank (5). The waste air recycling device disclosed by the invention has the advantages that furnace condition fluctuation, which is brought by pressure-equalizing operation of the hot blast stove, of the blast furnace can be relieved; and requirements of the blast furnace air blower on air charging capacity are further lowered due to buffer effect.

Description

technical field [0001] The invention belongs to the technical field of hot blast stoves in the metallurgical industry, and in particular provides a hot blast stove waste air recovery device with a waste wind buffer tank; it is suitable for hot blast stoves used in blast furnace ironmaking and smelting reduction ironmaking in the ironmaking process. Background technique [0002] The blast furnace hot blast stove is a regenerative heat exchanger that works periodically. Each blast furnace is generally equipped with 2 to 4 hot blast stoves (most blast furnaces are equipped with 3 hot blast stoves). The four working states of "(exothermic) and "stuffy furnace" are switched sequentially. Each hot blast stove reciprocates according to this cycle, and several hot blast stoves switch states in turn according to a certain rule to ensure continuous and stable delivery of high blast to the blast furnace. temperature, so as to ensure the safe continuous and stable production of the bla...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a hot blast stove exhaust air recovery device with an exhaust air buffer tank, which solves the problem that the current exhaust air recovery system is too simple, so in fact the exhaust air of the current hot blast stove is directly discharged into the atmosphere, which cannot Recycle its pressure energy

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