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Method for power generation by utilizing flue gas waste heat of semi-sealed electric furnace

A flue gas waste heat and semi-closed technology, which is applied in furnaces, waste heat treatment, furnace components, etc., can solve the problems of large horse-drawn carts and low steam production, achieve reduced fluctuations, low emission concentrations, and alleviate sudden surges. drop effect

Inactive Publication Date: 2014-10-01
无锡市东优环保科技有限公司
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  • Abstract
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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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  • Method for power generation by utilizing flue gas waste heat of semi-sealed electric furnace
  • Method for power generation by utilizing flue gas waste heat of semi-sealed electric furnace

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Embodiment Construction

[0021] Below in conjunction with accompanying drawing, the present invention will be further described:

[0022] Such as figure 1 Shown: the steps of the method for power generation with waste heat from the flue gas of the semi-closed electric furnace of the present invention are as follows:

[0023] 70t / h steelmaking semi-hermetic electric furnace 1 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 wind, the carbon monoxide gas is finally burned, and the flue gas passing through the combustion settling chamber 3 enters the heat storage homogenizer 5, and the heat storage homogenizer 5 includes a flue gas inlet 6, a carbon-copper composite material heat storage body 7, a sonic cleaner Ash device 9, flue gas outlet 10 and ash hopper 8, the car...

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Abstract

A method for power generation by utilizing flue gas waste heat of a semi-sealed electric furnace is characterized in that flue gas in the semi-sealed electric furnace is discharged out of a fourth hole, is mixed into cold air through a water-cooling sliding sleeve, enters a settling chamber, enters a heat storage temperature uniformizing device and enters a flow uniformizing heat storage chamber, the flue gas cooled is discharged out of a booster fan to be mixed with flue gas discharged out of a discharging pipeline connected above the semi-sealed electric furnace to enter a deduster together, the flue gas is pressed into an exhaust drum after being dedusted and is discharged into the atmosphere; meanwhile, organic working medium liquid absorbs heat of a flue gas waste heat carrier in a low-pressure stage evaporator, a medium-pressure stage evaporator and a high-pressure stage evaporator and becomes working medium steam, and the working medium steam does work by expansion in an organic turbine with a steam supplementing port and drives a generator to generate electricity. The method is characterized in that R600a is adopted to serve as a circulating organic working medium. According to the method, thermal energy in the flue gas can be recycled to the largest extent to be directly converted into high-grade electric energy, thermal efficiency according to the method is improved by 30-35% compared with single stage evaporation Rankine cycle, and the environmental protection effect is good.

Description

technical field [0001] The invention relates to a method for power generation by waste heat of flue gas in a semi-closed electric furnace. Specifically, it can maximize the recovery of heat energy in the flue gas and convert it into high-grade electric energy, and can improve the dust removal ability, belonging to the technical field of dust removal in a semi-closed electric furnace. Background technique [0002] In the prior art, the purification device for the flue gas of the semi-hermetic electric furnace is the flue gas generating equipment of the semi-hermetic electric furnace, the waste heat utilization facility, and the dust collector are sequentially connected 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 semi-closed electric furnace flue gas, and generate saturated steam, etc. Because the flue gas temperature of the semi-hermetic e...

Claims

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Application Information

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IPC IPC(8): F27D17/00F01K27/00
CPCY02P10/25
Inventor 王逸萍
Owner 无锡市东优环保科技有限公司
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