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Electric furnace fume multi-stage organic rankine cycle waste heat electricity generation and dust removing method

A technology of waste heat power generation and Rankine cycle, which is applied in the direction of machines/engines, furnaces, waste heat treatment, etc., can solve the problems of large horse-drawn carts and low steam production, and achieve the goal of reducing emission temperature, emission concentration, and entropy increase Effect

Inactive Publication Date: 2013-05-15
无锡市广运环保机械有限公司
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  • Abstract
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  • 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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  • Electric furnace fume multi-stage organic rankine cycle waste heat electricity generation and dust removing method
  • Electric furnace fume multi-stage organic rankine cycle waste heat electricity generation and dust removing method
  • Electric furnace fume multi-stage organic rankine cycle waste heat electricity generation and dust removing method

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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 As shown: the electric furnace flue gas multi-stage organic Rankine cycle waste heat power generation and dust removal method steps of the present invention are as follows: 90t / h steelmaking 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; Mix in the cold air, and finally burn the carbon monoxide gas, adjust and control the temperature of the flue gas in the settling chamber to 650°C, the flue gas from the combustion settling chamber 3 enters the waste heat exchanger 4, the high-temperature flue gas releases heat, completes the heat exchange, and the temperature drops to 100 ℃, directly into the dust collector...

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Abstract

An electric furnace fume multi-stage organic rankine cycle waste heat electricity generation and dust removing method is characterized in that fume inside an electric furnace is exhausted, is mixed into cold air through a water-cooling sleeve, and enters into a combustion settling chamber, the fume passing through the combustion settling chamber enters into a waste heat exchanger, and the fume releases heat which enters into a bag dust-removing device and is pressed into an air exhausting cylinder to enter into the air after dust removal. Meanwhile, organic working media pass through a lower-pressure stage working medium pump, a middle-pressure stage working medium pump and a high-pressure stage working medium pump and absorb heat from the lower-pressure stage working medium pump, the middle-pressure stage working medium pump and the high-pressure stage working medium pump to enable the heat to be transmitted into steam, and the working medium steam is expanded to act in a multi-stage organic turbine to drive a generator to generate electricity. The working medium steam exhausted by the organic turbine with a steam adding port is condensed into saturation liquid by a condenser, and a new round of cycle is started. The electric furnace fume multi-stage organic rankine cycle waste heat electricity generation and dust removing method is further characterized in that R152a is utilized as cycling organic media. The electric furnace fume multi-stage organic rankine cycle waste heat electricity generation and dust removing method can recycle heat energy in the fume farthest and enables the heat energy to be converted into high-quality electricity, the efficiency is improved by 10%-20% compared with a single-stage steaming organic rankine, and a good environment-friendly effect is achieved.

Description

technical field [0001] The invention relates to electric furnace flue gas multi-stage organic Rankine cycle waste heat power generation and dust removal method, specifically, it can maximize the recovery of heat energy in flue gas and convert it into high-grade electric energy, and can improve dust removal ability, belonging to the technical field of electric furnace dust removal. Background technique [0002] In the prior art, the purification device for electric furnace flue gas is electric furnace flue gas generating equipment, waste heat utilization facilities, and dust collectors connected in sequence through pipelines. [0003] At present, waste heat utilization facilities are usually used: water column waste heat boiler, heat pipe waste heat recovery device to recover the waste heat of 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 for ordinary water tube ...

Claims

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Application Information

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IPC IPC(8): F27D17/00F01D15/10
CPCY02E50/11Y02E20/14Y02E50/10Y02P10/25
Inventor 冯建新
Owner 无锡市广运环保机械有限公司
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