Method for preparing carbocoal by thermally cracking raw coal with external-heat horizontal rotary charring furnace

A rotary carbonization furnace and thermal cracking technology, applied in the field of coal chemical industry, can solve the problems of unreachable chemical utilization, affecting the quality of semi-coke, and shortage of raw materials, so as to reduce the generation of harmful gases, increase the usable value, and improve the utilization rate Effect

Active Publication Date: 2010-08-18
西安三瑞非常规能源开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] The disadvantages of the above method are: when the dry distillation is burned, the heat used in the dry distillation is mainly mixed with the returned furnace gas and air in the fire channel, and then blown into the dry distillation section by the blower through the burner for combustion. Therefore, the particle size of the raw coal required by it is relatively large , the requirement is 20-80mm. In actual coal mine production, such lump coal is only 30% to 40%, and there is a shortage of raw materials; due to the use of internal heat dry dis

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  • Method for preparing carbocoal by thermally cracking raw coal with external-heat horizontal rotary charring furnace
  • Method for preparing carbocoal by thermally cracking raw coal with external-heat horizontal rotary charring furnace

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Experimental program
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Effect test

Embodiment 1

[0023] 100kg of raw coal with a particle size of 20-25mm is sent to the drying section of the rotary carbonization furnace through a conveyor, where it is dried and desorbed at 260°C for 30 minutes to remove water and gas adsorbed in the pores. The dried raw coal enters the dry distillation section of the rotary carbonization furnace, and is thermally cracked at a material temperature of 600°C for 3 hours. After thermal cracking, blue charcoal, tar and coal gas are obtained. The pressure value of the rotary carbonization furnace is controlled at 10mm H 2 O, maintained between slightly negative pressure and slightly positive pressure. The installation method of the rotary carbonization furnace is horizontal, and the heating method of the rotary carbonization furnace is external heating. Part of the purified coal gas is sent to the combustion furnace to be fully combusted with hot air, and the generated hot air is sent into the jacket of the carbonization furnace dry distillation...

Embodiment 2

[0025] 80kg of raw coal with a particle size of 8-10mm is sent to the drying section of the rotary carbonization furnace through a conveyor, where it is dried and desorbed at 220°C for 20 minutes. The dried raw coal is sent to the dry distillation section of the rotary carbonization furnace, where it is thermally cracked at a material temperature of 650°C for 2.5 hours. After thermal cracking, blue charcoal, tar and coal gas are obtained. The pressure value is controlled at -10mm H 2 O. The blue char produced after cracking is sent to the coke quenching furnace for coke quenching, and is cooled by the countercurrent normal temperature nitrogen and the red hot red coke in the rotary dry quenching furnace. After quenching the coke, it enters the coke sieving device for screening treatment to obtain the finished blue charcoal. The mixture of high-temperature coal gas and tar produced after cracking is drawn from the gas guide pipe of the rotary carbonization furnace and enters th...

Embodiment 3

[0027] 120kg of raw coal with a particle size of 10-15mm is sent to the drying section of the rotary carbonization furnace through a conveyor, where it is dried and desorbed at 250°C for 60 minutes. The dried raw coal is sent to the dry distillation section of the rotary carbonization furnace, and is thermally cracked at a material temperature of 670°C for 4 hours. After thermal cracking, blue charcoal, tar and coal gas are obtained. The pressure value is controlled at 5mm H 2 O. The blue charcoal produced after cracking is sent to the coke oven for coke quenching, and the blue charcoal produced is sent to the cooler for cooling under the condition of isolating air, and the cooler adopts the form of circulating water spray cooling. After quenching the coke, it enters the coke sieving device for screening treatment to obtain the finished blue charcoal. The mixture of high-temperature coal gas and tar produced after cracking is drawn from the gas guide pipe of the rotary carboni...

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Abstract

The invention provides a method for preparing carbocoal by thermally cracking raw coal with an external-heat horizontal rotary charring furnace. The method comprises the following steps of: drying and desorbing the raw coal in a drying section of the rotary charring furnace at the temperature of between 100 and 300 DEG C; delivering the dried raw coal into a dry distillation section of the rotarycharring furnace; thermally cracking the raw coal for 1 to 5 hours at the temperature of between 500 and 700 DEG C of materials; obtaining the carbocoal, tar and coal gas after the thermal cracking; allowing the generated carbocoal to pass through a coke quenching furnace and a coke sieving device to obtain a carbocoal finished product; and allowing the generated tar and coal gas to pass through a coal gas separating and purifying device to obtain a high-quality tar finished product and a high-calorific-value coal gas finished product. The method can reduce the granularity of the raw coal, improve the utilization rate of the raw coal, additionally improve the calorific value of the coal gas and greatly improve the utilization value of the coal gas. The method improves the quality of the carbocoal, saves energy resources and reduces harmful gas by adopting a dry coke quenching and continuous decoking method. The method has the advantages of single reactant in the technical process and no discharge of waste gas, waste water or waste residue, and belongs to a project of environmental protection.

Description

Technical field [0001] The invention relates to a new process for industrialized production of blue charcoal-a process for preparing blue charcoal by thermally cracking raw coal in an externally heated horizontal rotary carbonization furnace, which belongs to the technical field of coal chemical industry. Background technique [0002] Blue charcoal, also known as semi-coke, is a kind of solid material with high fixed carbon content produced by the medium and low temperature dry distillation process using weakly caking coal of Jurassic non-stick coal as the raw material. When the blue char is produced, tar and tar are by-produced. Coke oven gas. Blue charcoal can be widely used in production and living areas such as calcium carbide, ferroalloys, chemical fertilizers, blast furnace injection and clean coal for urban residents; tar is extremely versatile and can be used to prepare clean fuel oil. It is also synthetic plastics, dyes, fibers, rubber, Pesticides, medicines, high tempe...

Claims

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Application Information

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IPC IPC(8): C10B53/04C10B47/06C10B57/10C10B53/08C10B39/02
Inventor 何建祥魏超
Owner 西安三瑞非常规能源开发有限公司
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