Utilizing method for flue gas waste heat of electric furnace

A flue gas waste heat and electric furnace technology, applied in furnaces, waste heat treatment, furnace components, etc., can solve the problems of large horse-drawn carts and low steam output, and achieve the goals of thermal expansion and contraction, low operating energy consumption, and reduced investment Effect

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

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Embodiment Construction

[0022] Below in conjunction with accompanying drawing, the present invention will be further described:

[0023] Such as figure 1 Shown: the steps of the energy-saving and dust-removing method for electric furnace high-temperature alternating flue gas waste heat power generation of the present invention are as follows:

[0024] 100t / h electric furnace 1 exhaust gas flow rate 30×10 4 N m 3 / h, temperature 820℃, dust concentration 15g / 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 eventually burned, and the flue gas passing through the combustion settling chamber 3 enters the heat storage homogenizer 5, which includes a flue gas inlet 6, a carbon-iron composite material regenerator 7, a sonic cleaner Ash device 9, flue gas outlet 10 and ash hopper 8, the carbon-iron composite regenerator 7...

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Abstract

The invention discloses a utilizing method for flue gas waste heat of an electric furnace. The utilizing method is characterized in that flue gas in the electric furnace is exhausted from a fourth hole, and is mixed into cold air through a water-cooled sliding sleeve; flue gas enters into a precipitating chamber and a heat storage thermostat; the flue gas from the heat storage thermostat and flue gas from an external exhaust pipeline connected to the upper part of the electric furnace are mixed and jointly enter into a homogeneous flow regenerative chamber; the flue gas from the homogeneous flow regenerative chamber 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, circulating water absorbs the heat of the flue gas from a heat exchanger and forms a steam-water mixture which enters into an evaporator to release the heat; organic working medium liquid absorbs the heat of the steam-water mixture and is changed into working medium steam; the working medium steam expands in an organic turbine with a stem supplementing port to do work, and drives a power generator to generate electricity. The utilizing method is also characterized in that R717 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, and a good environment-friendly effect is realized.

Description

technical field [0001] The invention relates to a method for utilizing waste heat of electric furnace 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 electric furnace dust removal. 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 for ordinary water tube waste heat boi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27D17/00F01K25/08F01K7/02F01K7/10F01D15/10
CPCY02P10/25Y02P80/15
Inventor 王正新
Owner 无锡市东优环保科技有限公司
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