Dedusting method using residual heat from flue gas of fully-closed electric furnace

A flue gas waste heat and fully enclosed technology, which is applied in the field of electric furnace dust removal, can solve the problems of large horse-drawn carts and low steam output, and achieve the effects of lower emission temperature, low emission concentration, and reduced entropy increase

Inactive Publication Date: 2016-08-24
王正新
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the actual steam output is far lower than the maximum evaporation capacity of the waste heat system, resulting in the situation of large horses and small carts

Method used

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  • Dedusting method using residual heat from flue gas of fully-closed electric furnace

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Embodiment Construction

[0012] Below in conjunction with accompanying drawing, the present invention will be further described:

[0013] Such as figure 1 Shown: the steps of the dedusting method for utilization of waste heat of flue gas of fully enclosed electric furnace of the present invention are as follows:

[0014] Fully enclosed electric furnace 1 internal exhaust gas flow rate 20×10 4 N m 3 / h, temperature 1000℃, dust concentration 25g / Nm 3 It is discharged from the fourth hole, mixed with cold air through the water-cooled sliding sleeve 2, and enters the combustion settling chamber 3 after burning carbon monoxide gas; Mixed with cold air, the carbon monoxide gas is finally burned, and the flue gas passing through the combustion and settling chamber 3 enters the cyclone dust collector 5 for pre-dust removal, and then enters the equal flow regenerator 6, where the high-temperature flue gas releases heat, and the temperature drops to 80°C. The cooled flue gas comes out of the booster fan 10 ...

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Abstract

The invention discloses a dedusting method using residual heat from flue gas of a fully-closed electric furnace. The dedusting method is characterized in that internally-exhausted flue gas of the electric furnace is exhausted through a fourth hole, and cold air is mixed in through a water-cooling sliding sleeve to enter a settling chamber; the flue gas enters a cyclone dust collector for pre-dedusting; then the flue gas enters a flow equalization regenerative chamber, the high temperature flue gas gives out heat, and when the temperature drops to 80 DEG C, the cooled flue gas comes from a booster fan to be mixed with flue gas from an external pipeline connected above the electric furnace to enter a sinter board dust catcher together, and the flue gas is pressed into an exhaust funnel by a main air blower to be injected into the atmosphere after dedusting; and meanwhile, organic working medium liquid absorbs the heat of flue gas residual heat carrier in a low pressure level evaporator, an intermediate pressure level evaporator and a high pressure level evaporator to be turned into working medium steam, the steam does work by expansion in an organic turbine with a steam adding opening, and accordingly an electric generator is driven to generate electricity. The dedusting method has the characteristic that R600a is used as a circulation organic working medium. By the adoption of the method, heat energy in the flue gas can be recovered to the maximum degree to be converted into high-grade electric energy directly, and therefore the environmental protection effect is good.

Description

technical field [0001] The invention relates to a method for dust removal by utilizing the residual heat of flue gas of a fully enclosed electric furnace, specifically capable of maximally recovering heat energy in flue gas and converting it into high-grade electric energy, and improving dust removal ability, belonging to the technical field of dust removal for electric furnaces. Background technique [0002] In the prior art, the purification device for the electric furnace flue gas is the electric furnace flue gas generating equipment, the waste heat utilization facility, and the plastic-fired plate dust collector connected in sequence through pipelines. [0003] At present, waste heat utilization facilities are commonly used: water tube waste heat boilers, regenerative waste heat boilers to recover waste heat from electric furnace flue gas, and generate saturated steam, etc. Because the flue gas temperature fluctuates sharply and the dust content is large, it is difficult...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27D17/00F22B1/18F01D15/10
CPCY02P10/25
Inventor 王正新
Owner 王正新
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