Composite type organic inhibitor for magnesia method desulfuration by-product recovery

A technology for organic inhibitors and desulfurization by-products

Inactive Publication Date: 2012-03-28
NORTH CHINA ELECTRIC POWER UNIV (BAODING) +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, there are few studies on the inhibition of oxidation by sulfite. Some people have tried to use substances such as sodium thiosulfate to slow down the oxidation reaction process of magnesium sulfite, but the actual effect is not good.

Method used

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  • Composite type organic inhibitor for magnesia method desulfuration by-product recovery
  • Composite type organic inhibitor for magnesia method desulfuration by-product recovery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Preparation and use of embodiment 1 inhibitor of the present invention

[0020] Weigh ascorbic acid (C 6 h 8 o 6 ) 1.88kg, ethanol (C 2 h 5 OH) 0.62L, phenol (C 6 h 5 OH) 1.0kg, dissolved in 0.5m at 40°C 3 In deionized water, adjust the pH value to about 7.0 with hydrochloric acid and ammonia water, stir and mix to make a compound organic inhibitor (in the compound organic inhibitor obtained in this embodiment, the molar ratio of ascorbic acid, phenol and ethanol is 1: 1 : 1).

[0021] During the desulfurization process, the magnesium hydroxide slurry reacts with the sulfur dioxide in the flue gas, and the obtained desulfurization slurry (the main components of the desulfurization slurry are magnesium sulfite and magnesium sulfate) enters the desulfurization holding tank, and the above-mentioned compound organic inhibitor 0.5m 3 , added to the desulfurization holding tank, the total volume of the reaction solution is 200m 3 , the concentration of ascorbic acid,...

Embodiment 2

[0022] The preparation and use of embodiment 2 inhibitors of the present invention

[0023] Weigh ascorbic acid (C 6 h 8 o 6 ) 4.70kg, ethanol (C 2 h 5 OH) 1.54L, phenol (C 6 h 5 OH) 2.51kg, dissolved in 0.5m at 40°C 3 In deionized water, adjust the pH value to about 6.5 with hydrochloric acid and ammonia water, stir and mix to make a compound organic inhibitor (in the compound organic inhibitor obtained in this embodiment, the molar ratio of ascorbic acid, phenol and ethanol is 1: 1 : 1).

[0024] During the desulfurization process, the magnesium hydroxide slurry reacts with the sulfur dioxide in the flue gas, and the obtained desulfurization slurry (the main components of the desulfurization slurry are magnesium sulfite and magnesium sulfate) enters the desulfurization holding tank, and the above-mentioned compound organic inhibitor 0.5m 3 , added to the desulfurization holding tank, the total volume of the reaction solution is 200m 3 , the concentration of ascorbic...

Embodiment 3

[0025] The preparation and use of embodiment 3 inhibitors of the present invention

[0026] Weigh ascorbic acid (C 6 h 8 o 6 ) 23.5kg, ethanol (C 2 h 5 OH) 3.75L, phenol (C 6 h 5 OH)6.25kg, dissolved in 2.5m at 40℃ 3 In deionized water, adjust the pH value to about 6.5 with hydrochloric acid and ammonia water, stir and mix to make a compound organic inhibitor (in the compound organic inhibitor obtained in this embodiment, the molar ratio of ascorbic acid, phenol and ethanol is 2: 1 : 1).

[0027] During the desulfurization process, the magnesium hydroxide slurry reacts with the sulfur dioxide in the flue gas, and the resulting desulfurization slurry (the main components of the desulfurization slurry are magnesium sulfite and magnesium sulfate) enters the desulfurization holding tank, and measures 2.0m of the above-mentioned compound organic inhibitor 3 , added to the desulfurization holding tank, the total volume of the reaction solution is 200m 3 , the concentrations...

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Abstract

The invention discloses a composite type organic inhibitor for magnesia desulfuration by-product recovery, a preparation method and application thereof, belonging to the technical field of flue gas desulfurization; the composite type organic inhibitor is formed by dissolving ascorbic acid, phenol and ethanol, the mole ratio of the ascorbic acid, the phenol and the ethanol is (1-10):1:1, the ascorbic acid, phenol and ethanol are added in a desulfuration liquid holding-up groove, so as to lead the amount-of-substance concentration of ascorbic acid, the phenol and the ethanol to be 2.67*10-6-2.67*10-3mol.L-1, 2.67*10-6-2.67*10-4mol.L-1 and 2.67*10-6-2.67*10-4mol.L-1 sequentially. In the invention, by reducing the oxidizing reaction rate of magnesium sulfite and improving the content of the magnesium sulfite in magnesium sulfite by-products, the desulfuration by-products can be convenient for recovery, the process is simplified and the energy consumption of the by-product recovery is reduced.

Description

technical field [0001] The invention belongs to the technical field of flue gas desulfurization, and in particular relates to a composite organic inhibitor used for recovering by-products of magnesium oxide desulfurization. Background technique [0002] Magnesium oxide desulfurization process has been relatively mature in foreign countries, but it is still in its infancy in my country, and is currently mainly used in the control of flue gas pollution of small and medium-sized industrial boilers. The basic principle is to use the hydrated solution of magnesium oxide as an absorbent to absorb sulfur dioxide in the flue gas to generate insoluble by-product magnesium sulfite, or to generate easily soluble magnesium sulfate after further oxidation. The process can still maintain a desulfurization efficiency higher than 95% under the condition of a low liquid-gas ratio (about 3-5), and has the characteristics of less investment, small footprint, stable operation, and high efficien...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/78B01D53/50C01F5/42
Inventor 汪黎东马永亮张雯娣张亚斌袁钢
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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