Vertical cooling and waste heat recovery furnace for sinters

Abstract

The invention discloses a vertical cooling and waste heat recovery furnace for sinters, which comprises a feeding hopper and a discharge hopper, wherein the feeding hopper and the discharge hopper are respectively communicated with the top and the bottom of a cooling chamber; first and second air ducts are sequentially sleeved in the cooling chamber; the walls of the first and second air ducts are respectively provided with a plurality of air outlet holes; the top of the first air duct is provided with a cone distributor; the bottom of the second air duct is communicated with a cold air inlet pipe; the cooling chamber is provided with an inner sleeve; a plurality of vent holes are distributed in the wall of the inner sleeve; a hot air collecting cavity is formed between the inner sleeve and a housing of the cooling chamber; the upper part of the hot air collecting cavity is communicated with a hot waste gas exhaust pipe; and the bottom of the hot air collecting cavity is communicated with the discharge hopper. The invention provides a cooling system integrating sinter cooling with closed hot flue gas recovery and waste heat utilization; the vertical cooling and waste heat recovery furnace for the sinters operates under a negative pressure in the cooling process; emission of pollutants can be greatly reduced; the field environment is improved; and the heat recovery rate is improved.

Description

technical field [0001] The invention relates to the field of sinter cooling and waste heat recovery, in particular to a vertical cooling and waste heat recovery furnace for sinter. Background technique [0002] According to statistics, the sensible heat of sinter cooling exhaust gas accounts for about 19% to 35% of the total energy consumption of the sintering process. There are three main ways to recycle the waste heat of sinter cooling exhaust gas in China: one is to directly purify the waste flue gas as the ignition furnace of the sintering machine Combustion air or used to preheat the mixture to reduce fuel consumption. This method is relatively simple, but the waste heat utilization is limited, generally no more than 10% of the flue gas volume; the second is to generate steam through the waste flue gas through the heat pipe device or waste heat boiler, and merge it into the steam pipe network to replace part of the coal-fired boiler; The steam generated by the waste he...

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Problems solved by technology

[0019] The technical problem to be solved by the present invention is to provide a vertical cooling and waste heat recovery furnace for sinter, which overcomes the high air leakage rate, high energy consumption and large heat loss of cooling sinter in the prior art, high rate of rapid cooling and crushing of sinter and high rate of returning ore, Low waste heat recovery rate, high cost of heat recovery, waste heat, dust escape, environmental pollution and other issues

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