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Organic acid reinforced steel slag fuel gas desulfurization method

An organic acid and steel strengthening technology, applied in chemical instruments and methods, separation methods, dispersed particle separation, etc., can solve the problems of affecting the desulfurization rate, slow dissolution of alkaline substances, etc. The effect of reducing the cost of desulfurization

Inactive Publication Date: 2012-08-01
CHENGDU UNIV OF INFORMATION TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The invention provides an organic acid-enhanced steel slag flue gas desulfurization process, which can solve the problem of slow dissolution of alkaline substances in steel slag and affect the desulfurization rate, achieve high desulfurization rate, and realize waste treatment with waste

Method used

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  • Organic acid reinforced steel slag fuel gas desulfurization method
  • Organic acid reinforced steel slag fuel gas desulfurization method

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Referring to accompanying drawing 1, steel slag is directly added in the steel slag dissolving tank 8 through 15, and the organic acid that replenishes simultaneously joins in the steel slag dissolving tank 8 from organic acid supply port 14, and after steel slag and organic acid react for 5-6 hours, the supernatant It is transported into the desulfurization tower 4 through the absorption slurry feed pump 7 and contacts with the flue gas entering from the flue gas inlet 1, and the absorption desulfurization reaction occurs, and the purified flue gas is discharged from the top 9 of the desulfurization tower 4 through the demister 10, absorbing SO 2 The absorption slurry is transported to the nozzle 11 through the slurry circulation pump 5 at the bottom of the desulfurization tower 4 to continue spraying and absorbing SO 2 , the sulfite and bisulfite generated at the bottom of the desulfurization tower 4 are forcibly oxidized into hemihydrate gypsum by the air blown in by...

Embodiment 2

[0035] According to the technological process described in embodiment 1, carry out the supporting flue gas desulfurization of 170t / h boiler, boiler outlet SO 2 The concentration is 1800mg / Nm 3 , the temperature is 152°C, the pH of the tower is 6.0, the organic acid in the steel slag slurry tank is acetic acid, the concentration is 10%, and the liquid-gas ratio is 5.0L / m 3 , the desulfurization rate is 96.2%, and the steel slag utilization rate is 98.6%.

Embodiment 3

[0037] The coal quality used in Example 2 is adjusted according to the process described in Example 1, and part of sulfur is added to increase the boiler flue gas outlet SO 2 The concentration is 9690mg / Nm 3 , the organic acid in the steel slag dissolving tank is citric acid, the concentration is 10%, and the liquid-gas ratio is 7.0L / m 3 , all the other conditions are the same as in Example 2, the desulfurization rate is 95.8%, and the steel slag utilization rate is 98%.

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Abstract

The invention discloses an organic acid reinforced steel slag fuel gas desulfurization method, which is mainly applied to sintering plants, thermal power plants, industrial fire coal boilers and other flue gas desulfurization (FGD) containing sulfur dioxide, and particularly has a good prospect specific to sintering flue gas desulfurization. Due to the adoption of the method, low investment and low running cost of flue gas desulfurization can be realized, and a desulfurization technology is applied more widely. A process adopted by the invention has the advantages of low investment, running and managing costs, realization of steel slag recycling, realization of treatment of waste with waste. The method has superior cost performance and a wide market prospect.

Description

technical field [0001] The invention relates to the removal of sulfur dioxide from sintering flue gas, thermal power plants, industrial boilers, and other flue gases containing sulfur dioxide, especially for sintering flue gas desulfurization (Flue Gas Desulfurizaiton, FGD), and also relates to a kind of steel slag solid waste recycling method. Background technique [0002] In recent years, my country's S0 2 The annual emissions are around 20 million tons, ranking first in the world. SO 2 The discharge of the pollution has caused acid rain in nearly one-third of my country's land area, becoming one of the three major acid rain areas in the world, and the loss caused to my country is more than 10 billion yuan every year. The focus comes from industries such as coal-fired boilers, smelting, and sintering. [0003] Currently, flue gas desulfurization (abbreviated as FGD) is the only large-scale commercial application of desulfurization technology in the world. The flue gas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/80B01D53/96B01D53/50
Inventor 刘盛余邱伟能子礼超
Owner CHENGDU UNIV OF INFORMATION TECH
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