Furnace top gas micro powder recovery pretreatment and heat energy recovery device

Abstract

The invention provides a furnace top gas micro powder recovery pretreatment and heat energy recovery device. The device comprises a cylinder shell piece, a gas-water separation plate, a gas distribution pipe insertion plate, a gas outlet pipe fixed plate, multiple gas distribution guide pipe pieces, multiple heat exchange branch pipes, multiple gas outlet straight pipes, a hot gas main pipe, a cooling gas outlet pipe, a steam outlet pipe, a water replenishing pipe and a liquid level meter. The device overcomes the defects of nonuniform distribution of gas currents between the heat exchange pipes and easy blockage of pipelines, and improves the heat exchange efficiency; the device creates structural conditions for enabling the temperature of gas in each heat exchange branch pipe to become uniform, and achieves the effects of no generation of water vapor condensation and no generation of higher temperature of the gas currents in each heat exchange branch pipe; heat in furnace top gas is changed to steam energy capable of being directly used, and the purpose of preventing powder in the furnace top gas from damaging the quality of micro powder due to condensation of water vapor is achieved; and the device can remove thick and heavy bad particles in the furnace top gas in advance, and has the characteristics of compact structure, high safety and long life.

Description

technical field [0001] The invention belongs to the technical field of inorganic non-metallic materials, in particular to a furnace top gas fine powder recovery pretreatment and heat energy recovery device. Background technique [0002] At present, the top gas temperature of metal silicon smelting furnaces, ferrosilicon alloy smelting furnaces, and zircon sand smelting furnaces is high and contains a large amount of heat, and contains a large amount of by-products (silica powder). For the problem of collecting (or gas-solid separation) equipment (such as cloth bags, electric dust collection, etc.), the method of spraying water or steam is usually used to cool down the high-temperature furnace top gas and then process it. The technology of directly spraying water to cool down increases the gas processing capacity of the subsequent dust collection (or gas-solid separation) equipment, a large amount of heat cannot be effectively recycled, water spray or steam spray causes the f...

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Problems solved by technology

[0003] Purpose of the invention of the present invention: mainly aiming at the above-mentioned situation, in order to overcome the shortcomings of the prior art, the purpose of the present invention is to provide a method of reducing the temperature of the furnace top gas and recovering heat and reducing the water consumption of direct spray cooling, so that after cooling The treated top gas meets the conditions for dry collection (or gas-solid separation) equipment, and can avoid undesirable phenomena such as powder agglomeration caused by water spray or steam spray, thereby ensuring the quality of the powder in the top gas. Treatment and heat recovery unit

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