Sinter vertical cooling device capable of realizing gradient heat recovery and complete waste gas circulation

Abstract

The invention relates to a sinter vertical cooling device capable of realizing gradient heat recovery and complete waste gas circulation. The device comprises a sintering machine, a discharging pipe,a skip car, a vertical cooling furnace, a stock bin, distributing pipes, discharging pipes, a belt, a gravity dust remover, a waste heat boiler, a multi-pipe dust remover, a hot water generator, a circulating fan, an air distributor, a steam turbine generator unit, a condenser, a water pump, a heat storage station and a hot water car, wherein the stock bin is arranged at the top of the vertical cooling furnace, the distributing pipes are arranged below the stock bin, the discharging pipes are arranged at the bottom of the vertical cooling furnace, the vertical cooling furnace is connected withthe multi-pipe dust remover, the hot water generator and the circulating fan through the gravity dust remover and the waste heat boiler, the heat storage station is connected with the hot water generator, and the steam turbine generator unit is connected with the waste heat boiler through the condenser and the water pump. According to the sinter vertical cooling device, the vertical cooling furnace adopts an optimized structural form, so that efficient heat exchange is achieved, and the sinter cooling requirement is met.

Description

technical field [0001] The invention relates to a cooling device, in particular to a vertical cooling device for sintered ore with cascaded heat recovery and exhaust gas full circulation, and belongs to the technical field of waste heat recovery of sintered ore. Background technique [0002] In the whole process of iron and steel production, the sintering process has high energy consumption and large emission of exhaust gas and dust. The traditional sinter ring cooling process has brought great challenges to the current green manufacturing development and upgrading of the iron and steel industry. The vertical cooling of sintering can significantly reduce the waste gas emission and dust in the sintering production process, improve the effect of energy recovery and utilization, and solve the bottleneck of sintering development. It is the future technology development direction. [0003] In the current relevant literature, the existing sinter vertical cooling technologies all h...

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Problems solved by technology

[0003] In the current relevant literature, the existing sinter vertical cooling technologies all have the phenomenon of cooling exhaust gas to varying degrees. Exhaust will cause a lot of heat loss

However, if it is sent to the sinter shaft furnace for recycling, the inlet air temperature is too high to meet the cooling requirements of the ore material, resulting in high ore discharge temperature and unsustainable normal production

For the existing vertical cooling technology, there is a prominent contradiction between the full recovery of waste heat of the exhaust gas and the suitable temperature of the vertical cooling ore discharge. The exhaust gas discharge cannot realize the full utilization of thermal energy resources and the effective solution of the exhaust gas dust discharge. If the exhaust gas is not discharged outside, it will affect the shaft furnace equipment. Long-term continuous safe operation

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