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Limestone-gypsum wet desulfurization additive

A technology of wet desulfurization and additives, which is applied in separation methods, chemical instruments and methods, and separation of dispersed particles. It can solve the problems of slurry overflow in the absorption tower, poor gypsum crystallization, and high price, and achieve high desulfurization efficiency and low cost. , promote the effect of dissolution

Inactive Publication Date: 2013-01-02
SNTO TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing additives often have problems such as large dosage, high price, poor crystallization of gypsum, and overflow of slurry in the absorption tower.

Method used

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  • Limestone-gypsum wet desulfurization additive
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  • Limestone-gypsum wet desulfurization additive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A limestone-gypsum wet desulfurization additive, its components and weight percent are: adipic acid 2, humic acid 4, citric acid 5, benzoic acid 12, glutaric acid 1, succinic acid 1, oxalic acid 1 , 4 p-hydroxybenzoic acid, 6 sodium oxide, 10 potassium oxide, 3 calcium oxide, 7 magnesium oxide, 4 aluminum oxide, 10 magnesium carbonate, 3 calcium carbonate, 3 magnesium chloride, 4 calcium chloride, 2 potassium permanganate, sulfur Ammonium sulfosulfate 2, sodium thiosulfate 2, peracetic acid 2, sodium hypochlorite 1, hydrogen peroxide 1, polysiloxane 2, sodium stearate 5, polyoxyethylene ether 3.

[0038] Flue gas SO2 concentration at the inlet of the desulfurization system is 2500mg / Nm 3 ; Liquid-gas ratio 10.1; Calcium-sulfur ratio 1.1. The additive concentration is 800mg / L, and the measured 24-hour desulfurization efficiency is more than 93%, which is 9% higher than that without additives on average.

Embodiment 2

[0040] A limestone-gypsum wet desulfurization additive, its composition and weight percent are: adipic acid 10, humic acid 5, citric acid 2, benzoic acid 2, glutaric acid 5, succinic acid 6, p-hydroxybenzoic acid 3. Sodium oxide 10, potassium oxide 2, calcium oxide 5, magnesium oxide 1, magnesium carbonate 5, calcium carbonate 3, potassium permanganate 10, ammonium thiosulfate 2, sodium thiosulfate 5, peracetic acid 3, sodium hypochlorite 15. Polysiloxane 2, Sodium Stearate 4.

[0041] The flue gas SO2 concentration at the inlet of the desulfurization system is 2300mg / Nm 3 ; Liquid-gas ratio 10.0; Calcium-sulfur ratio 1.1. The additive concentration is 900mg / L, and the measured 24-hour desulfurization efficiency is over 95%, which is 8% higher than that without additives on average.

Embodiment 3

[0043] A limestone-gypsum wet desulfurization additive, its composition and weight percent are: glutaric acid 15, succinic acid 15, oxalic acid 4.4, potassium oxide 20, calcium oxide 7, magnesium chloride 8, calcium chloride 10, sulfur Sodium sulfite 4, peracetic acid 10, sodium stearate 3.6, polyoxyethylene ether 3.

[0044] Flue gas SO2 concentration at the inlet of the desulfurization system is 2500mg / Nm 3 ; Liquid-gas ratio 10.1; Calcium-sulfur ratio 1.1. The additive concentration is 1000mg / L, and the measured 24-hour desulfurization efficiency is more than 93%, which is 8% higher than that without additives on average.

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Abstract

The invention relates to an additive, especially relates to an additive used for limestone-gypsum method flue gas desulfurization. The technical problem solved by the invention is in order to provide an additive capable of preventing desulfurization absorption tower scaling, and slurry overflowing, avoiding demister blockage, and improving desulfurization efficiency. In order to solve the above problem, the technical proposal taken by the invention adopts organic acid substance 30-70, metal oxide 10-30, salt substance 5-20, oxidation catalyst 15-35, and antifoaming agent 5-15. The technical proposal has obvious effect in defoaming, scaling reduction, demister blockage, slurry overflowing prevention, and desulfurization efficiency improvement.

Description

technical field [0001] The invention relates to an additive, in particular to an additive for limestone gypsum method flue gas desulfurizer. Background technique [0002] Air pollution control has become the theme of environmental governance in today's era, and the main indicator of atmospheric pollutants is sulfur dioxide (SO 2 ) and nitrogen oxides (NOx). The Ministry of Environmental Protection and the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China jointly issued the "Emission Standards of Air Pollutants for Thermal Power Plants" which will be implemented on January 1, 2012. The SO2 emission limit is implemented at 200mg / Nm3, which is stricter than the current emission limit specified in GB13223-2003. [0003] At present, more than 200 sulfur dioxide control technologies have been researched and developed by various countries in the world. Among the coal-fired flue gas desulfurization methods, the limestone-gyp...

Claims

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Application Information

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IPC IPC(8): B01D53/80B01D53/50
Inventor 李启云彭飞
Owner SNTO TECH GRP
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