High-wind-temperature hot blast heater with automatic air preheater

Abstract

The invention relates to a high-wind-temperature hot blast heater with an automatic air preheater, which can effectively solve the problems of combustion-supporting air preheating, coal gas and air mixing, insufficient combustion, low wind temperature, complex equipment configuration and high energy consumption. The structure of the high-wind-temperature hot blast heater with an automatic air preheater is as follows: the inner circumference of the wall of a combustor is provided with coal gas nozzles and air nozzles in a staggered mode, and communicated with a premixing annular channel; the upper part in the wall of the annular combustor is provided with a coal gas distribution annular channel, and the outer wall surface is provided with a coal gas intake pipe; a combustion-supporting air preheater is arranged in the large wall of a heat accumulation chamber, the upper part is arranged in the wall of the combustor and enters the premixing annular channel through the nozzles, the lower part is communicated with a combustion-supporting air distribution annular channel in the wall of the heat accumulation chamber, and the outer wall surface is provided with a combustion-supporting air intake pipe; a cold wind chamber is arranged under the heat accumulation chamber, and the wall of the cold wind chamber is provided with a fume discharge pipe and a cold wind intake pipe; and a heat accumulator in the heat accumulation chamber is arranged on a grate which is fixed on a rigid base of the hot blast heater. The invention has the advantages of investment saving, high efficiency, energy saving, environmental protection and long service life.

Description

1. Technical field [0001] The invention relates to a hot blast stove, especially a high-temperature hot blast stove with an air self-preheating device that provides high-temperature and high-pressure blast for ironmaking blast furnaces, or provides hot blast for general industrial heating. 2. Background technology [0002] At present, blast furnace hot blast stoves have entered the era of top-fired hot blast stoves. From the perspective of energy saving and consumption reduction, the blast furnace blast is required to develop in the direction of high blast temperature, especially to obtain high hot blast temperature under the combustion of low calorific value blast furnace gas, and to achieve high Thermal efficiency, in order to achieve the ultimate goal of high efficiency, energy saving, environmental protection, and production increase. The key to achieving high efficiency and high air temperature for a hot blast stove lies in whether its combustion process and heat transf...

AI Technical Summary

Problems solved by technology

[0003] In view of the above situation, in order to overcome the defects of the prior art, the object of the present invention is to provide a high wind temperature hot blast stove with an air self-preheating device, which can effectively solve the problem of combustion-supporting air preheating, gas and air mixing, and insufficient combustion. , the air temperature is not high, the equipment is complicated, and the energy consumption is large, etc.

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