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Catalytic desulphurization aqua for cement kiln flue gas

A technology for catalytic desulfurization and cement kiln, applied in gas treatment, chemical instruments and methods, membrane technology, etc., can solve the problems of increasing operating costs, occupying a large land area, etc., achieving small equipment investment, small footprint, and operating costs. suitable effect

Inactive Publication Date: 2017-10-20
董小军
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the traditional flue gas desulfurization method is adopted, adding a wet desulfurization device at the end of the flue gas will greatly increase the operating cost and require a large amount of land area

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The invention provides a catalytic desulfurization water agent for cement kiln flue gas, which is formed by mixing the following components and their mass percentages: 6% urea, 8% sodium carbonate, 3% sodium bicarbonate, 0.05% potassium permanganate, Sodium borate 4%, balance is tap water.

[0025] The product of this embodiment is used on the new dry-process cement production line of Henan Tianrui Cement Factory. During the vertical milling period, SO 2 The actual monitoring result of the concentration is 830mg / Nm 3 , after adding desulfurizer for 20min, SO in the flue gas 2 The actual emission concentration is reduced to 100mg / m 3 the following.

Embodiment 2

[0027] The invention provides a catalytic desulfurization water agent for cement kiln flue gas, which is formed by mixing the following components and their mass percentages: 4% urea, 9% potassium carbonate, 5% potassium bicarbonate, 0.1% potassium permanganate, meta Sodium borate 5%, balance is tap water.

[0028] The product of this embodiment is used on the new dry-process cement production line of Sichuan Hongshi Cement Factory. During the vertical milling period, SO 2 The actual monitoring result of the concentration is 570mg / Nm 3 , after adding desulfurizer for 20min, SO in the flue gas 2 The actual emission concentration is reduced to 100mg / m 3 the following.

Embodiment 3

[0030] The invention provides a catalytic desulfurization water agent for cement kiln flue gas, which is formed by mixing the following components and their mass percentages: 3% urea, 10% sodium carbonate, 2% sodium bicarbonate, 0.08% potassium permanganate, Sodium borate 3%, the balance is tap water.

[0031] The product of this embodiment is used on the new dry process cement production line of Guizhou Southwest Cement Plant. During the opening of the vertical mill, SO 2 The actual monitoring result of the concentration is 430mg / Nm 3 , after adding desulfurizer for 20min, SO in the flue gas 2 The actual emission concentration is reduced to 100mg / m 3 the following.

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PUM

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Abstract

The invention provides a catalytic desulphurization aqua for cement kiln flue gas. The catalytic desulphurization aqua is prepared through mixing, by mass, 1-10% of urea or ammonia water, 1-10% of sodium carbonate or potassium carbonate, 0.5-5% of sodium bicarbonate or potassium bicarbonate, 0.001-0.1% of potassium permanganate, 3-5% of sodium metaborate, and the balance of tap water, and the desulphurization aqua is used for cement kiln sulfur fixation. The catalytic sulfur fixation aqua adopting an amino group and sodium metaborate as a combined catalyst, potassium permanganate as an oxidant and sodium carbonate and potassium bicarbonate as sulfur fixation reaction groups has the advantages of simplicity in use, high sulfur fixation efficiency, small occupied area, small device investment, suitable running cost, low energy consumption, and low concentration of SO2 in a flue gas outlet.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a catalytic desulfurization water agent for cement kiln flue gas. Background technique [0002] Due to the deep and wide limestone veins, it is usually accompanied by sulfur-containing minerals such as pyrite. The sulfur content of limestone used in some cement plants varies greatly, sometimes as high as 0.2% or more; in response to the government's call for environmental protection, some cement plants also increase Waste incineration, urban sludge, waste tires, etc., the sulfur content of some of these fuel raw materials is as high as 1% or more; as the cement market declines, and sometimes the price of coal rises, some cement plants have to use high Sulfur coal, its sulfur content is as high as 3% or more. As a result, SO in cement kiln flue gas 2 The emission concentration may seriously exceed the standard (>200mg / Nm 3 ). According to "Emission Standard...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/86B01D53/50
CPCB01D53/8609B01D2251/10B01D2251/304B01D2251/306B01D2251/606B01D2255/2027B01D2255/70B01D2258/0283
Inventor 董小军熊书庆刘茂徐晓红吴建峰陈袁魁李鑫鑫
Owner 董小军
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