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Desulfurated and denitrated activated coke and preparation method thereof

A technology for nitrifying activated coke and coking coal, applied in the field of desulfurization and denitrification activated coke, can solve the problems of high cost and large specific surface area of ​​desulfurization activated carbon, and achieve the effects of reducing loss, good desulfurization performance and reducing cost

Pending Publication Date: 2011-03-30
赵建勋
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  • Abstract
  • Description
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Problems solved by technology

[0003] Chinese invention patent CN02160182.8 discloses a production method of desulfurization and denitrification activated carbon. The method uses bituminous coal and coking coal as the main raw materials, through the steps of preparing coal powder, preparing tar, manufacturing coal paste, molding and granulating, carbonization, activation and oxidation. A desulfurization and denitrification activated carbon has been prepared. The desulfurization activated carbon produced by this method has high strength and large specific surface area, but the cost of the invention is relatively high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Pulverize lignite and coking coal to 160 mesh, take 50% of lignite of 160 mesh, 22% of coking coal of 160 mesh, 12% of asphalt, 12% of tar, 9% of water, 0.5% of vanadium pentoxide, and 0.5% of copper oxide, mix and stir evenly, Until the coal paste is formed, the coal paste is processed in the granulation equipment and shaped into granules, so that the granules meet the strength specified in GB7702.3-1997. Then the formed particles are dried in a fluidized bed, and the moisture inside the material is evaporated to reduce the moisture inside the material to 5%. The dried material is added to the carbonization activation furnace, and the air is isolated and heated to 650°C for 6 hours. Afterwards, the temperature was raised to 850° C., while nitrogen, 25% water vapor, and 2% oxygen were passed through for activation for 4 hours, and cooled to obtain the desired product. The strength of the tested product is 90%, the iodine value reaches 900mg / g, and the breakthrough sulfu...

Embodiment 2

[0026] Pulverize lignite and coking coal to 170 mesh, take 170 mesh lignite 51%, 170 mesh coking coal 21%, asphalt 10%, tar 15%, water 10%, vanadium pentoxide 1%, copper oxide 1%, mix and stir evenly, Until the coal paste is formed, the coal paste is processed in the granulation equipment and shaped into granules, so that the granules meet the strength specified in GB7702.3-1997. Then the formed particles are dried in a fluidized bed, and the moisture inside the material is evaporated to reduce the moisture inside the material to 8%. The dried material is added to the carbonization activation furnace, and the air is isolated and heated to 650°C for 6 hours. Afterwards, the temperature was raised to 900°C, and nitrogen, 15% water vapor, 1.2% oxygen and 1.5% CO were introduced at the same time. 2 , kept for 4 hours, and cooled to obtain the desired product. The strength of the product is 92%, the iodine value is 910mg / g, and the breakthrough sulfur capacity is 9.62gSO 2 / 100gC...

Embodiment 3

[0028] Crush lignite and coking coal to 180 mesh, take 49% of 180 mesh lignite, 23% of 180 mesh coking coal, 7% pitch, 11% tar, 9% water, 1% vanadium pentoxide, 2% copper oxide Mix and stir evenly until the coal paste is formed. The coal paste is processed in the granulation equipment and shaped into granules so that the granules meet the strength specified in GB7702.3-1997. Then the formed particles are dried in a fluidized bed, and the moisture inside the material is evaporated to reduce the moisture inside the material to 10%. The dried material is added to the carbonization activation furnace, and the air is isolated and heated to 700°C for 7 hours. Afterwards, the temperature was raised to 800° C., and nitrogen, 16% water vapor, and 2% oxygen were introduced into the mixture at the same time, kept for 4 hours, and cooled to obtain the desired product. After testing, the strength of the product reaches 95%, the iodine value reaches 950mg / g, and the breakthrough sulfur capa...

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Abstract

The invention provides desulfurated and denitrated activated coke and a preparation method thereof. The desulfurated and denitrated activated coke is prepared from lignite and coking coal which are crushed into certain fineness, pitch, tar, vanadium pentoxide, copper oxide and water through kneading, shaping, drying, charring and activating. The desulfurated and denitrated activated coke prepared from the raw materials by the method not only has good desulfuration and denitration effect but also has low cost, simplicity in preparation and strong practicability.

Description

technical field [0001] The invention relates to a desulfurization and denitration active coke, and also relates to a preparation method of the desulfurization and denitration active coke. Background technique [0002] At present, the flue gas desulfurization technology commonly used in China is mainly calcium desulfurization. This method not only has high operating costs and complicated operations, but also has low flue gas temperature after washing, and waste water and waste residues will cause secondary pollution and greenhouse gas CO 2 Excess emissions. The carbon method has gradually replaced the above-mentioned calcium method for desulfurization, but the similar carbon materials currently used for flue gas desulfurization have high cost, small specific surface area, low strength, underdeveloped mesopores, and poor desulfurization effect. The breakthrough sulfur capacity of existing desulfurization adsorbents is generally 2-4gSO 2 / 100gC. [0003] Chinese invention pa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/08C01B31/10B01J20/20B01J20/30C01B32/336
Inventor 赵建勋隋志文程洪义张伟
Owner 赵建勋
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