Method for preparing activated carbon by separating refined carbon from gasified slag

A technology for preparing activated carbon and gasification slag, applied in chemical instruments and methods, climate sustainability, carbon compounds, etc., can solve heavy metal soil and water pollution, high loss on ignition of gasification coarse slag, and can only be landfilled or Stacking and other problems, to achieve the effect of reducing the amount of treatment, low price, and low coal powder addition

Pending Publication Date: 2022-08-05
CCTEG CHINA COAL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The coal gasification process produces a large amount of solid waste—gasification slag. The gasification slag is divided into two types: coarse slag and fine slag. The coarse slag is a low melting point eutectic in coal ash and quenched with water to form a fragmented glass body. The gasifier low ash slag is discharged from the lock hopper, which accounts for 60-80% of the total gasification slag. Its composition is similar to that of boiler ash and slag. The loss on ignition of the gasification coarse slag produced by the furnace type or gasification process is relatively high, which is largely limited by the application; the fine slag is discharged with the flue gas in the form of fly ash, and the flue gas is formed after washing, purification and precipitation, accounting for the gasification 20% to 40% of the total slag, and the loss on ignition is as high as 20% to 30%. It cannot be directly used as building and road materials. At present, it can only be landfilled or stacked, resulting in waste of resources. The leakage of heavy metals will also cause soil and water damage. pollute

Method used

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  • Method for preparing activated carbon by separating refined carbon from gasified slag
  • Method for preparing activated carbon by separating refined carbon from gasified slag
  • Method for preparing activated carbon by separating refined carbon from gasified slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] A method for preparing activated carbon by utilizing gasification slag flotation refined carbon, comprising the following steps:

[0069] (1) Milling and kneading

[0070] The flotation refined carbon with ash content of 20% and the long-flame coal with ash content of 7.5% are respectively dried, crushed, pulverized, sieved, and passed through a 180-mesh sieve to obtain a particle size of 80 ): 2.5, relative density (d 4 20 ): 1.15, asphalt content 60%, toluene insoluble matter: 4.0%, ash content: 0.1%, moisture: 2%): water mass ratio of 1:0.02:0.30:0.15, solid KOH was formulated into a 20% solution, with The high-temperature coal tar and water are added to the mixed powder in turn, wherein the high-temperature coal tar is preheated to 75°C, the water temperature is 60°C, and then vigorously kneaded in a kneader (with heat tracing at 70°C) to form a coal paste.

[0071] (2) Forming and aging

[0072] The coal paste was extruded into a smooth cylindrical shape in a hy...

Embodiment 2

[0076] A method for preparing activated carbon by utilizing gasification slag flotation refined carbon, comprising the following steps:

[0077] (1) Milling and kneading

[0078] The flotation refined carbon with ash content of 15% and the long flame coal with ash content of 7.5% are dried, crushed, pulverized, sieved, and passed through a 180-mesh sieve to obtain a particle size of 80 ): 2.5, relative density (d 4 20 ): 1.15, asphalt content 60%, toluene insoluble matter: 4.0%, ash content: 0.1%, moisture: 2%): water mass ratio of 1:0.02:0.30:0.15, solid KOH was formulated into a 20% solution, with The high-temperature coal tar and water are added to the mixed powder in turn, wherein the high-temperature coal tar is preheated to 75°C, the water temperature is 60°C, and then vigorously kneaded in a kneader (with heat tracing at 70°C) to form a coal paste.

[0079] (2) Forming and aging

[0080] The coal paste was extruded into a smooth cylindrical shape in a hydraulic press...

Embodiment 3

[0084] A method for preparing activated carbon by utilizing gasification slag flotation refined carbon, comprising the following steps:

[0085] (1) Milling and kneading

[0086] The flotation refined carbon with 15% ash content and the long flame coal with 7.5% ash content are dried, crushed, pulverized, sieved, and passed through a 180-mesh sieve to obtain a particle size of 80 ): 2.5, relative density (d 4 20 ): 1.15, asphalt content 60%, toluene insoluble matter: 4.0%, ash content: 0.1%, moisture: 2%): water mass ratio is 1:0.05:0.30:0.15, solid KOH is formulated into a 20% solution, with The high-temperature coal tar and water are added to the mixed powder in turn, wherein the high-temperature coal tar is preheated to 75°C, the water temperature is 60°C, and then vigorously kneaded in a kneader (with heat tracing at 70°C) to form a coal paste.

[0087] (2) Forming and aging

[0088] The coal paste was extruded into a smooth cylindrical shape in a hydraulic press, and a...

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Abstract

The invention discloses a method for preparing activated carbon from gasified slag separated refined carbon, which comprises the following steps: uniformly mixing and stirring refined carbon powder and low-rank coal powder according to the mass ratio of 5: (0.25-1) to form mixed powder, and proportioning according to the mass ratio of the mixed powder to solid potassium hydroxide to high-temperature coal tar to water of 1: (0.02-0.05): (0.30-0.40): (0.10-0.20); preparing solid potassium hydroxide into an aqueous solution, sequentially adding the aqueous solution, high-temperature coal tar and water into the mixed powder, and uniformly mixing and kneading to form coal paste; and forming, aging, carbonizing and activating the coal paste to obtain an activated carbon product. By regulating and controlling the proportion of the refined carbon to the low-rank coal, the dosage of potassium hydroxide and the like, the prepared activated carbon product has good mesoporous distribution characteristics and is suitable for the fields of water treatment, purification, adsorption and the like.

Description

technical field [0001] The invention belongs to the field of comprehensive utilization of coal chemical solid waste, and in particular relates to a method and a product for preparing activated carbon by using gasification slag sorting and refined carbon. Background technique [0002] The utilization of coal mainly includes combustion power generation and clean transformation of coal chemical industry. my country's coal chemical industry is developing rapidly. Among them, coal gasification is the leading technology in the modern coal chemical industry. It is the development of coal-based chemicals, coal-based liquid fuels, IGCC power generation, poly Fundamentals of process industries such as systems, hydrogen production and fuel cells. [0003] The coal gasification process produces a large amount of solid waste—gasification slag. The gasification slag is divided into two categories: coarse slag and fine slag. The low ash slag of the gasifier is discharged from the lock hopp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/33C01B32/336
CPCC01B32/33C01B32/336Y02P20/129
Inventor 赵鹏刘敏李兰廷黄澎寇丽红李文博胡发亭
Owner CCTEG CHINA COAL RES INST
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