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Method for reinforcing lime stone slurry activity in smoke desulfurizing process and combined additive

A technology for limestone slurry and desulfurization process, which is applied in chemical instruments and methods, separation methods, and dispersed particle separation to achieve the effects of reducing the amount of residue, improving operating flexibility, and reducing operating costs.

Active Publication Date: 2008-01-30
国能朗新明环保科技有限公司
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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for enhancing the activity of limestone slurry and a combination of additives to solve the problems of enhancing the activity of limestone slurry and further improving desulfurization efficiency; and solve the problems of improving the utilization rate of absorbents and preventing scaling; and also solve the problem of improving system operation Reliability, reducing operating costs issues

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  • Method for reinforcing lime stone slurry activity in smoke desulfurizing process and combined additive

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Embodiment Construction

[0030] In this method of strengthening the activity of limestone slurry in the flue gas desulfurization process, the following two substances are directly added to the limestone slurry at normal temperature and pressure:

[0031] (1) The addition amount of industrial adipic acid can be selected as: 850mg / l, 900mg / l, 1000mg / l, 1050mg / l, 1100mg / l or 1150mg / l.

[0032] (2) The amount of industrial sodium chloride can be selected as: 850mg / l, 900mg / l, 950mg / l, 1000mg / l, 1100mg / l or 1200mg / l, 1300mg / l, 1400mg / l, 1500mg / l , 1600mg / l, 1700mg / l, 1800mg / l, 1900mg / l, 2000mg / l, 2100mg / l, 2200mg / l, 2500mg / l, 2700mg / l, 3000mg / l, 3200mg / l, 3400mg / l or 3450mg / l. The above sodium chloride NaCl can use magnesium chloride MgCl 2 or Calcium Chloride CaCl 2 substitute.

[0033] This combined additive for enhancing the activity of limestone slurry in the flue gas desulfurization process, its components and mass ratio can be selected:

[0034] Adipic acid: chloride salt-1:1; adipic acid: chlo...

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Abstract

The present invention relates to method of reinforcing limestone slurry activity in fume desulfurizing process and the combined additive. Into limestone slurry, two kinds of matter are added, including adipic acid in 1000 + / -15%mg / L and chlorine salt in (1000-3000) + / -15%mg / L, with the weight ratio between adipic acid and chlorine salt being 1 to 1-3, and the chlorine salt being NaCl, MgCl2 or CaCl2. The present invention has reaction catalyzing effect to raise the reaction activity by over 50 %, and is favorable to the dissolving of gas and the creation of solid product in desulfurizing reaction. It has also 10 % raised desulfurizing rate, lowered limestone consumption, reduced slag amount, lowered operation cost and raised system operation flexibility, and may be applied in fume desulfurizing limestone / lime-gypsum process for thermal power plant.

Description

(1) Technical field [0001] The invention relates to a method for enhancing the activity of limestone slurry in wet desulfurization reaction and combined additives. (two), background technology [0002] In the prior art, power plants and industrial boilers usually use fossil fuels, such as coal and oil. Because these fossil fuels generally contain sulfur components, harmful substances such as sulfur dioxide will be produced during the combustion process. Limestone-gypsum wet flue gas desulfurization devices are widely used in large power plant boilers to remove sulfur dioxide in boiler flue gas. Limestone-gypsum wet flue gas desulfurization plant needs limestone slurry as absorbent to absorb sulfur dioxide in flue gas. [0003] The chemical reaction process of wet limestone desulfurization consists of the following five processes: ① Diffusion and dissolution of sulfur dioxide from the gas phase body through the gas-liquid interface; ② Hydration of dissolved sulfur dioxide; ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/50
Inventor 陈志强田天马文静张世乾邵雪峰
Owner 国能朗新明环保科技有限公司
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