Zero-heat carrier powdered coal low-temperature dry distillation carbonization method

A pulverized coal, low-temperature technology, applied in the field of coal dry distillation, can solve the problems of uneven transmission of heat and temperature to materials, difficulty in separation of powder and coke, and small space between materials, and achieve the effect of safe use, simple process and high safety

CN103333705AActive Publication Date: 2013-10-02CHINA NAT HEAVY MACHINERY RES INSTCO
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2013-10-02

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Abstract

The invention relates to a zero-heat carrier powdered coal low-temperature dry distillation carbonization method. The zero-heat carrier powdered coal low-temperature carbonization method is characterized by being carried out in a closed furnace body, carrying out drying and waste heat recovery on powdered coal by utilizing heat-conducting oil inside a heat-conducting oil furnace and carrying out carbonization and heating on the powdered coal by utilizing a gas-fired radiant pipe. The method is carried out according to the following five steps of: screening; pressing for forming; drying; carrying out carbonization; carrying out waste heat recovery. The method disclosed by the invention can realize that the carbonization treatment is carried out on the powdered coal with a diameter smaller than 20 mm and can be used for treating and utilizing the by-product generated in a carbonization process.
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Description

technical field

[0001] The invention relates to the technical field of coal dry distillation, and relates to a low-temperature dry distillation method for pulverized coal without heat carrier. Background technique

[0002] Coal low-temperature dry distillation uses coal pyrolysis processing technology to heat coal to 550°C to 600°C in the absence of air to remove water, oxygen, and low-calorie volatile substances that affect the calorific value of coal, so that the calorific components of coal are enriched. Set to form a solid semi-coke. The separated volatile substances are purified and recovered to produce coal tar and gas products.

[0003] Through pyrolysis processing, ordinary power coal can be effectively classified and separated into coal tar, high-quality semi-coke and gas fuel, which greatly improves the utilization value of coal.

[0004] Coal dry distillation process can be divided into: solid heat carrier method, gas heat carrier method and no heat carrier meth...

Examples

Embodiment Construction

[0020] A low-temperature dry distillation method for pulverized coal without heat carrier. The method is carried out in a closed walking furnace, and the process sections of the walking furnace are separated by sealing devices to avoid the mutual influence of gases in each section and ensure that the The stability of the working temperature and the dry distillation gas concentration are not affected by the exhaust gas in the drying section.

[0021] The walking furnace is divided into a drying section, a dry distillation section and a waste heat recovery section. The heat transfer oil in the heat transfer oil furnace dries the pulverized coal and recovers waste heat, and the gas radiant tube performs dry distillation of the pulverized coal.

[0022] like figure 1 As shown, the concrete steps of this heat carrier-free pulverized coal low-temperature dry distillation method are as follows:

[0023] Step 1, screening; screen the pulverized coal directly from the coal mine with a...