A waste heat recovery device for yellow phosphorus slag water quenching

Abstract

The invention relates to the technical field of thermal engineering, and discloses a yellow phosphorus furnace slag water quenching waste heat recovery device, comprising an electric furnace, a slag discharge port, a chute located below the slag discharge port, a water quenching pool connected to the bottom of the chute, and a slag discharge port A yellow phosphorus combustion device is installed at the junction with the chute, and a spray heat exchanger connected to the water quenching pool through a return pipe and a return pump. The spray heat exchanger is provided with a device for introducing the gas in the combustion device into the spray Induced fan in the heat exchanger. The invention has the following advantages and effects: first, the slag is sprayed and cooled by cold water, and after a large amount of steam is collected by the gas collecting hood, the waste heat is recovered in the steam heat exchanger, and the waste heat recovery efficiency is high; the spray heat exchanger can quench water The heat of hot water in the pool is recovered, and the spray heat exchanger can also exchange heat for P 2 o 5 Absorbed to achieve the effect of saving energy and reducing consumption while controlling pollution.

Description

technical field [0001] The invention relates to the technical field of thermal engineering, in particular to a waste heat recovery device for yellow phosphorus slag water quenching. Background technique [0002] In the production process of yellow phosphorus, apatite, quartz and coke are smelted at a high temperature of about 1600°C in an electric arc furnace. When yellow phosphorus is produced, a large amount of high-temperature slag is produced. At present, the slag is usually discharged directly into a water pool for water quenching. The water quenching tank is usually open. After the high-temperature slag enters the water quenching tank, the water generates a large amount of water vapor under the action of heat. The slag also contains yellow phosphorus. When the yellow phosphorus encounters air, it burns to form white phosphorus pentoxide. Smoke, phosphorus pentoxide and water vapor are mixed to form phosphoric acid. If unorganized discharge will cause corrosion to the e...

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Problems solved by technology

[0002] In the production process of yellow phosphorus, apatite, quartz and coke are smelted at a high temperature of about 1600°C in an electric arc furnace. When yellow phosphorus is produced, a large amount of high-temperature slag is produced. At present, the slag is usually discharged directly into a water pool for water quenching. The water quenching tank is usually open. After the high-temperature slag enters the water quenching tank, the water generates a large amount of water vapor under the action of heat. The slag also contains yellow phosphorus. When the yellow phosphorus encounters air, it burns to form white phosphorus pentoxide. Smoke, phosphorus pentoxide and water vapor are mixed to form phosphoric acid. If unorganized discharge will cause corrosion to the equipment of the factory, it will also lead to a bad factory environment and affect the health of the staff.

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