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Electric furnace smoke multistage organic Rankine cycle waste heat power generation 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 lower discharge temperature, lower operating energy consumption, lower investment and The effect of running costs

Inactive Publication Date: 2014-10-01
无锡市东优环保科技有限公司
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  • 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 smoke multistage organic Rankine cycle waste heat power generation method
  • Electric furnace smoke multistage organic Rankine cycle waste heat power generation method
  • Electric furnace smoke multistage organic Rankine cycle waste heat power generation method

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Embodiment Construction

[0019] Below in conjunction with accompanying drawing, the present invention will be further described:

[0020] Such as figure 1 Shown: the steps of the electric furnace flue gas multi-stage organic Rankine cycle waste heat power generation method of the present invention are as follows:

[0021] 50t / h steelmaking electric furnace 1 exhaust gas flow rate 18×10 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 settling chamber 3 enters the waste heat exchange chamber 5. The high-temperature flue gas releases heat, and the temperature drops to 80°C. The cooled flue gas comes out from the booster fan 9 and is connected to the The flue gas from the exhaust pipe 4 above the elect...

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Abstract

An electric furnace smoke multistage organic Rankine cycle waste heat power generation method is characterized in that smoke discharged from an electric furnace is discharged through a fourth hole, cold air is mixed into the smoke through a water cooling sliding sleeve, the smoke enters a sedimentation chamber and a waste heat exchange chamber, high temperature smoke releases heat, the cooled smoke is discharged from a pressurizing fan to be mixed with smoke discharged from an external discharging pipeline connected with the upper portion of the electric furnace and enter a dust remover together, the mixed smoke is subjected to dust removing and is pressed into a discharging barrel through a main fan and discharged to the atmosphere, and meanwhile organic working medium liquid absorbs heat of a smoke waste heat carrier in a low pressure evaporator, a medium pressure evaporator and a high pressure evaporator to be turned into working medium steam to expand and do work in an organic turbine with a steam supplementation port and drive a power generator to generate power. The method is characterized in that R290 is adopted as a cycle organic working medium. By means of the method, heat energy in the smoke can be recycled to the largest extent and is directly converted into high-grade power, the heat efficiency is increased by 31-36% compared with that of a single-stage evaporation organic Rankine cycle, and the environment protection effect is good.

Description

technical field [0001] The invention relates to a multi-stage organic Rankine cycle waste heat power generation method of electric furnace flue gas, 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 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 for ordinary water tube waste heat boilers ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27D17/00F01K11/02F01K25/10
CPCY02P10/25
Inventor 王逸萍
Owner 无锡市东优环保科技有限公司
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