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A kind of renewable dry flue gas desulfurizer and its preparation method and application

A dry-process flue gas desulfurization and desulfurization agent technology, applied in the field of flue gas desulfurization purification, can solve the problems of low utilization rate of calcium oxide, poor regeneration performance of desulfurization agent, and low desulfurization efficiency, so as to save dust removal steps and low additive content , the effect of high sulfur capacity

Active Publication Date: 2020-10-02
SOUTHWEST RES & DESIGN INST OF CHEM IND
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] It can be seen that the current dry desulfurization technology has disadvantages such as low utilization rate of calcium oxide, low desulfurization efficiency and poor regeneration performance of desulfurization agent. Improving the utilization rate of calcium oxide of dry desulfurization agent, reducing the cost of desulfurization agent, and improving the regeneration performance of desulfurization agent are dry desulfurization. Main key breakthrough points for technology popularization and application

Method used

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  • A kind of renewable dry flue gas desulfurizer and its preparation method and application
  • A kind of renewable dry flue gas desulfurizer and its preparation method and application
  • A kind of renewable dry flue gas desulfurizer and its preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Preparation of desulfurizer 1.

[0046] Active components and content: quicklime is used as raw material, CaO (50wt.%);

[0047] Additives and content: Fe 2 o 3 (4wt.%), CeO 2 and ZrO 2 (4wt.%, the molar ratio of Ce and Zr is 3:2);

[0048] Carrier and content: Kaolin (42wt.%).

[0049] Concrete preparation method is:

[0050] (1) Take by weighing 20g ferric nitrate nonahydrate, 6.8g cerium nitrate hexahydrate and 4.5g zirconium nitrate pentahydrate and dissolve them in 200ml deionized water, stir until completely dissolved at 40°C, use 10wt.% ammonia solution to adjust pH = Stop at 10 o'clock. Aged at 40°C for 4h, then filtered. After filtration, it was dried at 110°C for later use to obtain the additive composite oxide.

[0051] (2) After weighing 50g of quicklime, 42g of kaolin and the auxiliary composite oxide, carry out dry ball milling mixing, the ball milling speed is 200rpm / min, the particle size of the powder after ball milling is 150-200 mesh, add wat...

Embodiment 2

[0054] Preparation of desulfurizer 2.

[0055] Active components and content: quicklime is used as raw material, CaO (22wt.%);

[0056] Additives and content: Fe 2 o 3 (4wt.%), CeO 2 and ZrO 2 (4wt.%, the molar ratio of Ce and Zr is 3:2);

[0057] Carrier and content: kaolin (70wt.%).

[0058] Concrete preparation method is:

[0059] (1) Take by weighing 20g ferric nitrate nonahydrate, 6.8g cerium nitrate hexahydrate and 4.5g zirconium nitrate pentahydrate and dissolve them in 200ml deionized water, stir until completely dissolved at 40°C, use 10wt.% ammonia solution to adjust pH = Stop at 10 o'clock. Aged at 40°C for 4h, then filtered. After filtration, it was dried at 110°C for later use to obtain the additive composite oxide.

[0060] (2) After weighing 22g of quicklime, 70g of kaolin and the auxiliary composite oxide, carry out dry ball milling mixing, the ball milling speed is 200rpm / min, the particle size of the powder after ball milling is 150-200 mesh, add wat...

Embodiment 3

[0063] Preparation of desulfurizer 3.

[0064] Active components and content: quicklime is used as raw material, CaO (50wt.%);

[0065] Additives and content: Fe 2 o 3 (2wt.%), CeO 2 and ZrO 2 (2wt.%, the molar ratio of Ce and Zr is 3:2);

[0066] Carrier and content: Kaolin (46wt.%).

[0067] Concrete preparation method is:

[0068] (1) Take by weighing 10g ferric nitrate nonahydrate, 3.4g cerium nitrate hexahydrate and 2.3g zirconium nitrate pentahydrate and dissolve them in 200ml deionized water, stir until completely dissolved at 40°C, use 10wt.% ammonia solution to adjust pH = Stop at 10 o'clock. Aged at 40°C for 4h, then filtered. After filtration, it was dried at 110°C for later use to obtain the additive composite oxide.

[0069] (2) After weighing 50g of quicklime, 46g of kaolin and the auxiliary composite oxide, carry out dry ball milling mixing, the ball milling speed is 200rpm / min, the particle size of the powder after ball milling is 150-200 mesh, add wat...

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Abstract

The invention discloses a renewable dry-method flue gas desulfurizing agent and a preparation method and application thereof and relates to the field of flue gas desulfurization and purification in coal-fired power plants, heating boilers and metallurgy and chemical industry. The renewable dry-method flue gas desulfurizing agent used for removing SO2 and SO3 components in flue gas comprises activecomponent CaO, an auxiliary and a carrier, wherein the active component is made of cheap quick lime or slaked lime; the auxiliary is the combination of Fe, Ce and Zr oxides; the carrier is kaolin. The renewable dry-method flue gas desulfurizing agent has the advantages that the renewable dry-method flue gas desulfurizing agent is low in raw material cost, good in desulfurizing effect, high in sulfur capacity and good in renewability, the sulfur capacity of the renewable dry-method flue gas desulfurizing agent which is repeatedly used for 10 times is more than 90% of that of the renewable dry-method flue gas desulfurizing agent which is used for the first time, and the renewable dry-method flue gas desulfurizing agent also has a dust removing effect during use.

Description

technical field [0001] The invention relates to a renewable dry-process flue gas desulfurizer, a preparation method and application thereof, and belongs to the technical field of flue gas desulfurization and purification. Background technique [0002] Coal is an important basic energy and industrial raw material, which accounts for more than 65% of my country's primary energy consumption. A large amount of coal burning produces a large amount of pollutants such as sulfur dioxide. Flue gas desulfurization is the most effective method to control sulfur dioxide pollution, and it is also a desulfurization technology commonly used in the market. [0003] The methods of flue gas desulfurization are roughly divided into three categories: wet method, that is, using liquid absorbents such as water or lye to wash the flue gas to remove sulfur dioxide; Sulfur dioxide reacts to produce dry powdered calcium sulfite, which has the characteristics of both wet and dry methods; dry method ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/83B01D53/82B01D53/50
CPCB01D53/508B01D2251/404
Inventor 苏敏赵丹张新波李启强张明胜向建安颜智
Owner SOUTHWEST RES & DESIGN INST OF CHEM IND
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