Silicon smelting electric furnace waste heat power generation process flow and configuration

Abstract

The invention provides silicon smelting electric furnace waste heat power generating equipment, which consists of a valve 1, a waste heat boiler 2, a turbo generator 3, a vapor condenser 4, a cooling tower 5, a circulating water pump 6, a condensing water pump 7, a vapor seal heater 8, a low-pressure heater 9, a deaerator 10, a feed water pump 11, a chimney 12, a bag dust collector 13, an induceddraft fan 14, a air cooler 15, a steel ball collection conveying distribution lifting device 17, a mixing cold air valve 18 and a by-pass valve 19, wherein waste flue gas discharged by a silicon smelting electric furnace 16 is introduced into the waste heat boiler to release partial heat; and when the temperature of the waste flue gas is reduced to nearly 180 DEG C, the waste flue gas enters the bag dust collector through the induced draft fan, and finally is discharged to atmosphere through the chimney. The desalted water enters the waste heat boiler through the feed water pump, vapor generated by the waste heat boiler enters the turbo generator; and after the vapor does work, the vapor enters the vapor condenser to be condensed into water, and the water enters the deaerator through a condensate removal pump, and the deoxidized water enters the waste heat boiler through the feed water pump. The silicon smelting electric furnace waste heat power generating equipment has the advantagesof good energy saving effect, little investment and low cost.

Description

technical field [0001] The invention belongs to the technical field of waste heat power generation, and is especially suitable for a process flow and equipment configuration of waste heat power generation of a silicon smelting electric furnace. Background technique [0002] As we all know, a large amount of waste heat flue gas is discharged in the smelting process of silicon smelting, ferrosilicon smelting, etc., and they carry a large amount of waste heat. If they are not utilized, a large amount of waste heat resources will be wasted in vain. [0003] At present, there are two main ways to deal with the waste heat of flue gas as mentioned above: [0004] The first is direct cooling and emission. A large amount of flue gas generated by the electric furnace in the production process is cooled by the air cooler, and the waste heat is discharged into the atmosphere. The temperature of the flue gas drops below 180°C, and the dust is collected by the bag filter before being disc...

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Problems solved by technology

[0006] Due to the immature flue gas extraction technology, waste heat fluctuations, dust accumulation in heat exchangers, and insufficient heat consumption by heat users, the failure rate of heat exchangers is high and the input rate is low, and most of the waste heat is still wasted.

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