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Method for coal-tar-free preparation of desulfurization and denitrification activated carbon

A technology for desulfurization, denitrification, and activated carbon, which is applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problems of high cost, volatile toxic and harmful substances in coal tar, achieve low price, reduce occupational health hazards, and use small amount of effect

Pending Publication Date: 2021-09-17
SHANXI XINHUA CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a method for preparing desulfurization and denitrification activated carbon without coal tar in order to solve the technical problem of volatile, toxic and harmful substances and high cost in the prior art.

Method used

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  • Method for coal-tar-free preparation of desulfurization and denitrification activated carbon
  • Method for coal-tar-free preparation of desulfurization and denitrification activated carbon

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1. Preparation of binder solution: use sodium lignosulfonate, mix it with water at a mass ratio of 2:3, let it stand in a water bath at 60-80°C for 4 hours, the sodium lignosulfonate / calcium is completely dissolved, and prepare into a solution, and the solution is used as a binder for the preparation of desulfurization and denitrification activated carbon.

[0023] 2. Finished product preparation: Mix 80 parts of coal powder, 10 parts of binder solution, and 10 parts of water in proportion, and mix for 10 minutes to form coal paste, which is then shaped by a granulator. ℃-650℃ temperature gradient carbonization furnace, uniform carbonization for 1 hour (gradient carbonization is 350℃ for 5min, 450℃ for 5min, 550℃ for 5min, 650℃ for 5min, the heating rate is 10℃ / mim), enter to Activation furnace, uniform activation at 700°C-850°C temperature gradient for 2 hours (gradient activation is 700°C for 10 minutes, 750°C for 10 minutes, 800°C for 10 minutes, 850°C for 60 minutes...

Embodiment 2

[0025] 1. Preparation of binder solution: use calcium lignosulfonate, mix it with water at a mass ratio of 2:3, let it stand in a water bath at 60-80°C for 4 hours, the sodium / calcium lignosulfonate is completely dissolved, and prepare into a solution, and the solution is used as a binder for the preparation of desulfurization and denitrification activated carbon.

[0026] 2. Finished product preparation: Mix 78 parts of coal powder, 13 parts of binder solution, and 7 parts of water in proportion, and mix for 10 minutes to form coal paste, which is then molded by a granulator. ℃-650℃ temperature gradient carbonization furnace, uniform carbonization for 1 hour (gradient carbonization is 350℃ for 5min, 450℃ for 5min, 550℃ for 5min, 650℃ for 5min, the heating rate is 10℃ / mim), enter to Activation furnace, uniform activation at 700°C-850°C temperature gradient for 2 hours (gradient activation is 700°C for 10 minutes, 750°C for 10 minutes, 800°C for 10 minutes, 850°C for 60 minutes...

Embodiment 3

[0028] 1. Preparation of binder solution: use sodium lignosulfonate, mix it with water at a mass ratio of 2:3, let it stand in a water bath at 60-80°C for 4 hours, the sodium lignosulfonate / calcium is completely dissolved, and prepare into a solution, and the solution is used as a binder for the preparation of desulfurization and denitrification activated carbon.

[0029] 2. Finished product preparation: Mix 70 parts of coal powder, 15 parts of binder solution, and 5 parts of water in proportion, and mix for 10 minutes to form coal paste, which is then molded by a granulator. ℃-650℃ temperature gradient carbonization furnace, uniform carbonization for 1 hour (gradient carbonization is 350℃ for 5min, 450℃ for 5min, 550℃ for 5min, 650℃ for 5min, the heating rate is 10℃ / mim), enter to Activation furnace, uniform activation at 700°C-850°C temperature gradient for 2 hours (gradient activation is 700°C for 10 minutes, 750°C for 10 minutes, 800°C for 10 minutes, 850°C for 60 minutes,...

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Abstract

The invention relates to preparation of activated carbon, in particular to a method for coal-tar-free preparation of desulfurization and denitrification activated carbon. The method comprises the following steps: 1) preparation of an adhesive solution: mixing sodium / calcium lignosulfonate with water, conducting standing in a water bath, and obtaining the adhesive solution after the sodium / calcium lignosulfonate is completely dissolved; and 2) preparation of desulfurization and denitrification activated carbon: mixing the adhesive solution obtained in the step 1) with pulverized coal and water in proportion to form coal paste, conducting molding by a granulator, conducting carbonizing and activating, conducting discharging, and conducting cooling and screening to obtain the desulfurization and denitrification activated carbon. The adhesive used in the invention is non-toxic and odorless, and can effectively reduce occupational health hazards to field operators. The adhesive is low in price and small in dosage, adhesive powder is dissolved in water to be prepared into a solution for use, and the preparation cost of the desulfurization and denitrification activated carbon is effectively reduced. In the using process of the adhesive, no organic matter volatilizes, and the problem of environmental pollution in the production process of desulfurization and denitrification activated carbon is solved.

Description

technical field [0001] The invention relates to the preparation of activated carbon, in particular to a method for preparing desulfurization and denitrification activated carbon from coal tar. Background technique [0002] In recent years, due to the development of national environmental protection situation, dry desulfurization and denitrification technology has been widely used in sintering of steel industry, waste incineration power generation, coking tail gas desulfurization and denitrification purification treatment. At present, the annual demand of domestic desulfurization and denitration activated carbon market is about 500,000 tons, and the production capacity About 1 million tons. Desulfurization and denitrification activated carbon is prepared by mixing coal powder, tar and water in a certain proportion, granulating or stretching, and then carbonizing and activating. Coal tar acts as a binder in it. The main problems that exist are: [0003] a. Coal tar itself c...

Claims

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Application Information

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IPC IPC(8): C01B32/318C01B32/312
CPCC01B32/318C01B32/312
Inventor 雷彭张会涛张志军李若梅王泽兵王佳欣冷新宇
Owner SHANXI XINHUA CHEM
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