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Utilizing method for flue gas waste heat of cupola furnace

A flue gas waste heat and cupola technology, which is applied in furnaces, waste heat treatment, furnace components, etc., can solve the problems of large horse-drawn carts and low steam output, and achieve lower discharge temperature, low operating energy consumption, and reduced entropy increase Effect

Inactive Publication Date: 2016-02-10
无锡市东优环保科技有限公司
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  • Summary
  • 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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  • Utilizing method for flue gas waste heat of cupola furnace
  • Utilizing method for flue gas waste heat of cupola furnace
  • Utilizing method for flue gas waste heat of cupola furnace

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Embodiment Construction

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

[0020] like figure 1 Shown: the cupola flue gas waste heat utilization method step of the present invention is as follows:

[0021] 50t / h steelmaking cupola 1 internal exhaust flue 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 cupola 1 is mixed and enters the plastic-fired plate dust coll...

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Abstract

The invention discloses a utilizing method for flue gas waste heat of a cupola furnace. The utilizing method is characterized in that flue gas in the cupola furnace is exhausted from a fourth hole, is mixed into cold air through a water-cooled sliding sleeve, and enters into a precipitating chamber and a waste heat exchange chamber; high-temperature flue gas releases the heat; cooled flue gas is exhausted from a booster fan, and is mixed with flue gas from an external exhaust pipeline connected to the upper part of an electric furnace; mixed flue gas enters into a sinter board dust catcher; dedusted flue gas is pressed into an exhaust funnel through a main air blower and is exhausted into the atmosphere; meanwhile, organic working medium liquid absorbs the 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 is changed into working medium steam; the working medium steam expands in an organic turbine with a steam supplementing port to do work, and drives a power generator to generate electricity. The utilizing method is also characterized in that R290 is adopted as a cyclic organic working medium. By adopting the method disclosed by the invention, heat energy in the flue gas can be recovered to the maximum extent and is directly converted into high-grade electric energy; compared with single-stage evaporation organic Rankine's cycle, the utilizing method has the advantages that the heat efficiency is improved by 31 to 36 percent, and a good environment-friendly effect is realized.

Description

technical field [0001] The invention relates to a method for utilizing waste heat of cupola flue gas, in particular, 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 cupola dust removal. Background technique [0002] In the prior art, the purification device for the cupola flue gas is the cupola flue gas generating equipment, the waste heat utilization facility, and the 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 the waste heat of cupola flue gas and generate saturated steam, etc. Because the flue gas temperature fluctuates violently and the dust content is large, it is difficult for ordinary water tube waste heat boilers to be used for waste heat recovery of flue gas from cupolas. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27D17/00F01K27/02F01D15/10
CPCY02P10/25
Inventor 陆耀忠
Owner 无锡市东优环保科技有限公司
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