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Flue gas desulfurizing agent as well as preparation method and application thereof

A desulfurizer and flue gas technology, applied in the field of flue gas purification, can solve the problems of easy pulverization, poor crush resistance, low strength of calcium-based desulfurizer, etc., and achieves high porosity and high radial crush resistance. , the effect of enhancing adhesion

Active Publication Date: 2020-06-26
北京予知环境工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defects of the calcium-based desulfurizers in the prior art, such as low strength, poor crush resistance, and easy pulverization under high temperature conditions, so as to provide a suitable bulk density and porosity, compression resistance Flue gas desulfurizer with high crushing strength and difficult pulverization under high temperature conditions, preparation method and application thereof

Method used

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  • Flue gas desulfurizing agent as well as preparation method and application thereof
  • Flue gas desulfurizing agent as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A flue gas desulfurizer, the raw materials of which are as follows: 30 kg of slaked lime powder, 20 kg of silica fume, 2 kg of cement, 2 kg of kaolinite, 2 kg of montmorillonite, 3 kg of sodium sulfate decahydrate, and 3 kg of calcium chloride dihydrate.

[0034] The preparation method of this flue gas desulfurizer is as follows:

[0035] Put all the above-mentioned raw materials into the mixing equipment and mix them evenly to obtain the mixed powder;

[0036] Add 30% water of the weight of the mixed powder to the mixed powder, seal and stir in the mixing equipment for 20 minutes, and extrude with hydraulic equipment to obtain the molding material;

[0037] Place the molding material in a sealed incubator at 50°C for 14 hours;

[0038] The molded material is taken out from the sealed incubator and roasted at 300°C for 2 hours, taken out and aired to room temperature to obtain a finished granular flue gas desulfurizer with a particle size of 6-8mm.

Embodiment 2

[0040] A flue gas desulfurizer, the raw materials of which are as follows: slaked lime powder 40kg, silica fume 40kg, cement 9kg, illite 10kg, chlorite 5kg, sodium carbonate decahydrate 15kg.

[0041] The preparation method of this flue gas desulfurizer is as follows:

[0042] Put all the above-mentioned raw materials into the mixing equipment and mix them evenly to obtain the mixed powder;

[0043] Add water with 50% of the weight of the mixed powder to the mixed powder, seal and stir in the mixing equipment for 30 minutes, and extrude with hydraulic equipment to obtain the molding material;

[0044] Put the molding material in a sealed incubator at 30°C for 20 hours;

[0045] The molded material is taken out from the sealed incubator and roasted at 200°C for 6 hours, taken out and aired to room temperature to obtain a cylindrical strip-shaped flue gas desulfurizer product with a diameter of 6-8mm.

Embodiment 3

[0047] A flue gas desulfurizer, the raw materials of which are as follows: 60 kg of slaked lime powder, 60 kg of silica fume, 5 kg of cement, 10 kg of kaolinite, 5 kg of ferrous sulfate heptahydrate, and 5 kg of potassium carbonate trihydrate.

[0048] The preparation method of this flue gas desulfurizer is as follows:

[0049] Put all the above-mentioned raw materials into the mixing equipment and mix them evenly to obtain the mixed powder;

[0050] Add water with 60% of the weight of the mixed powder to the mixed powder, seal and stir in the mixing equipment for 10 minutes, and extrude with hydraulic equipment to obtain the molding material;

[0051] Put the molding material in a sealed incubator at 100°C for 4 hours;

[0052] The molding material is taken out from the sealed incubator and baked at 300° C. for 4 hours, taken out and aired to room temperature to obtain a four-leaf clover strip-shaped flue gas desulfurizer product with a diameter of 6-8 mm.

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Abstract

The invention provides a flue gas desulfurizing agent as well as a preparation method and application thereof. The flue gas desulfurizing agent comprises the following raw materials in parts by weight: 30-60 parts of slaked lime powder, 20-60 parts of silica fume, 6-24 parts of a binder and 6-15 parts of crystalline hydrated salt. According to the flue gas desulfurizing agent, active substances inthe slaked lime powder and the silica fume are subjected to a pozzolanic reaction to generate high-strength hydrated silicate; the binder can bind all the raw material components to improve the strength of the flue gas desulfurizing agent; the crystalline hydrated salt plays a pore-forming role by losing crystalline water in the flue gas desulfurizing agent; mutual cooperation of components, theflue gas desulfurizing agent has relatively small stacking density (0.5-0.8 g / cm<3>), relatively high radial crushing strength (120-280 N / cm) and relatively large porosity (40-65%); the desulfurizingagent can be used for a fixed bed reactor or a moving bed reactor, is suitable for purification treatment of SO2-containing industrial flue gas or waste gas at 20-330 DEG C, has relatively high reaction activity, particularly still has relatively high crushing resistance under a relatively high flue gas temperature condition, and is not easy to pulverize and low in bed pressure.

Description

technical field [0001] The invention relates to the field of flue gas purification, in particular to a flue gas desulfurizer and its preparation method and application. Background technique [0002] With the rapid development of the economy, a large amount of flue gas will be produced in industrial production, and the flue gas contains sulfur oxides (SO 2 and SO 3 ) and nitrogen oxides (NO X ) and other harmful gases, the air pollution caused by flue gas emissions is becoming more and more serious. my country's requirements for environmental protection are getting higher and higher. Desulfurization treatment is the key process before flue gas discharge. At present, most domestic coal-fired power plants use basically mature wet desulfurization technology to remove SO 2 , but wet desulfurization technology will bring secondary pollution problems such as equipment corrosion, waste water discharge, white smoke and white fog, etc., requiring more investment and technology to s...

Claims

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Application Information

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IPC IPC(8): B01D53/50B01D53/81
CPCB01D53/508B01D2251/404B01D2251/602B01D2258/0283
Inventor 张运于春林刘欢尧静敏单斌杰高延江
Owner 北京予知环境工程有限公司
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