Device and method for power generation by waste heat of blast furnace slag

A waste heat power generation and blast furnace slag technology, which is applied in the field of blast furnace slag waste heat power generation device and high temperature molten iron waste heat recovery, can solve the problem of low heat energy utilization rate and achieve the effect of improving energy utilization rate

Active Publication Date: 2012-11-21
BEIJING SHOUGANG INT ENG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The object of the present invention is to provide a blast furnace slag waste heat power generation device, which overc...

Method used

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  • Device and method for power generation by waste heat of blast furnace slag
  • Device and method for power generation by waste heat of blast furnace slag
  • Device and method for power generation by waste heat of blast furnace slag

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Embodiment 1

[0030] like figure 1 As shown, the blast furnace slag waste heat power generation device includes a first water pump 1, a hot water pool 2, a first heat exchanger 3, a hot water storage tank 4, a second water pump 5, a feed water pump 6, a high-pressure nitrogen source 7, and a second heat exchanger 8. Blast furnace slag 9, thermal deaerator 10, high temperature water storage tank 11, first flash tank 12, second flash tank 13, steam turbine 14, generator 15, condenser 16, condensate pump 17, cooling Tower 18 and so on constitute. The specific process steps and parameters are:

[0031] The first water pump 1 passes through the first heat exchanger 3 through the first heat exchanger 3 and conducts heat exchange with the slag flushing water at about 80°C in the hot water pool 2. The desalinated water is heated to about 70°C and then enters the hot water storage tank 4, and then the desalinated water is heated to about 70°C. The second water pump 5 is sent to the deaerator 10 fo...

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Abstract

A device and a method for power generation by waste heat of a blast furnace slag belong to the technical field of utilization of waste heat of iron-making blast furnace slag. The device for power generation by the waste heat of the blast furnace slag comprises a water pump, a hot water pool, a heat exchanger, a hot water storage tank, a water-feeding pump, a high-pressure nitrogen source, blast furnace slag, a thermal deaerator, a high-temperature water tank, a flash tank, a steam turbine, a generator, a condenser and a condensing pump. On the premise of not influencing free flow of the blast furnace slag and an original slag flushing process, partial waste superheat of blast furnace slag is recycled to generate steam and power, and the device for power generation by the waste heat of the blast furnace slag is economical and suitable to use and reliable in technology.

Description

technical field [0001] The invention belongs to the technical field of waste heat utilization of ironmaking blast furnace slag, and in particular provides a blast furnace slag waste heat power generation device and a power generation method, which are suitable for waste heat recovery of high-temperature molten iron. Background technique [0002] The steel industry is a major energy consumer. Recovery of waste heat in production is the main measure to reduce energy consumption. About 0.3-0.4 tons of slag is produced per ton of iron in blast furnace production. Blast furnace slag has a very high temperature of about ~1500°C, and the enthalpy of blast furnace slag is about 1700MJ / T slag, which has a high recovery value. Based on the calculation of my country's annual pig iron production of 400 million tons, about 140 million tons of blast furnace slag is produced every year. The heat taken away by blast furnace slag is equivalent to 11.3 million tons of standard coal every yea...

Claims

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Application Information

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IPC IPC(8): F01K11/02F01D15/10F22B1/04
Inventor 刘庸田淑霞张福明张全申李长兴吕新鹏梁辉生
Owner BEIJING SHOUGANG INT ENG TECH
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