Metal caloric low-temperature dry distillation process for long flame coal or lignite

A technology of metal heat and long-flame coal, which is applied in the direction of direct heating dry distillation, special form dry distillation, petroleum industry, etc., can solve the problems of high product added value, low heat recovery, low comprehensive efficiency, etc., so as to improve utilization rate and Utilization value, no consumption of water resources, high value-added effect

Inactive Publication Date: 2012-03-28
河北邦农电子商务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The raw coal after low-temperature carbonization treatment has high added value and wide range of products, but the traditional low-temperature carbonization process has a certain degree of unreasonableness in the waste gas treatment and heat recovery in the whole process, and the products produced by it have medium and high added value. The proportion of the value is low, and the comprehensive efficiency is low

Method used

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  • Metal caloric low-temperature dry distillation process for long flame coal or lignite
  • Metal caloric low-temperature dry distillation process for long flame coal or lignite
  • Metal caloric low-temperature dry distillation process for long flame coal or lignite

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Under normal pressure, the tail gas reducing gas is used to dry and heat the pulverized coal, the heating temperature is controlled at 120-180 degrees, the pulverized coal is preheated and dried, and the particle size of the coal particles is below 2mm. The heating temperature of the metal heat mass is controlled at 730 degrees, and the metal heat mass is a cast steel ball. According to the weight ratio of coal powder and metal thermal mass 1:10, it is sent into the reaction kettle in batches, the temperature of the reaction kettle is kept at 650 degrees, the atmosphere is reduced, and the reaction time is 90 seconds. During the dry distillation process, the volatile substances are extracted by negative pressure and collected in six stages. Coke powder and metal heat are separated by sieving. The coke powder is formed by hot pressing, and the coke ball is cooled by nitrogen gas to reduce the temperature to below 160 degrees Celsius. The sieved metal thermal mass, with...

Embodiment 2

[0029] Under normal pressure, the tail gas reducing gas is used to dry and heat the pulverized coal, the heating temperature is controlled at 120-180 degrees, the pulverized coal is preheated and dried, and the particle size of the coal particles is below 2mm. The heating temperature of the metal heat mass is controlled at 680 degrees, and the metal heat mass is a cast steel ball. According to the weight ratio of coal powder and metal thermal mass 1:15, send them into the reaction kettle in batches, keep the temperature of the reaction kettle at 650 degrees, reduce the atmosphere state, and the reaction time is 60 seconds. During the dry distillation process, the volatile substances are extracted by negative pressure and collected in six stages. Coke powder and metal heat are separated by sieving. The coke powder is formed by hot pressing, and the coke ball is cooled by nitrogen gas to reduce the temperature to below 160 degrees Celsius. The sieved metal thermal mass, with w...

Embodiment 3

[0031] Under normal pressure, the tail gas reducing gas is used to dry and heat the pulverized coal, the heating temperature is controlled at 120-180 degrees, the pulverized coal is preheated and dried, and the particle size of the coal particles is below 2mm. The heating temperature of the metal heat mass is controlled at 630 degrees, and the metal heat mass is a cast steel ball. According to the weight ratio of coal powder and metal thermal mass 1:20, send them into the reaction kettle in batches, keep the temperature of the reaction kettle at 650 degrees, reduce the atmosphere state, and the reaction time is 30 seconds. During the dry distillation process, the volatile substances are extracted by negative pressure and collected in six stages. Coke powder and metal heat are separated by sieving. The coke powder is formed by hot pressing, and the coke ball is cooled by nitrogen gas to reduce the temperature to below 160 degrees Celsius. The sieved metal thermal mass, with w...

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Abstract

The invention discloses a metal caloric low-temperature dry distillation process for long flame coal or lignite. The process comprises the steps of washing, dressing and milling of raw coal, drying of coal powder, dry distillation, collection of dry distillation gas and tar and treatment of coke powder. A metal carrier medium serving as a caloric carrier is heated to a predetermined temperature and then mixed with the coal powder in a ratio in a closed container, the mixture is distilled, the tar and the dry distillation gas are collected by using negative pressure, the caloric carrier is separated from the rest solid mixture, the rest solid mixture is reheated and recycled, the thermal energy generated when the coke powder is cooled is recycled, the raw coal is preheated and dried by using tail gas waste heat, and the preheated and dried coal is directly extracted in a reaction kettle; the quality of the obtained tar and the obtained dry distillation gas is good, the utilization rate and the utilization value of the coal are improved, the extraction process is easily controlled under normal pressure and at medium temperature, and the reaction temperature is below 750 DEG C; the process does not consume water resources; and the product is stable, has high additional value, is not easily self-ignited, does not absorb moisture, and can be transported for long distance.

Description

technical field [0001] The invention relates to a low-temperature dry distillation process of coal, in particular to a metal thermal mass low-temperature dry distillation process of long-flame coal and lignite. Background technique [0002] At present, the low-temperature carbonization process of coal is relatively mature, and can be roughly divided into the following processes: ① screening and grinding of raw coal, ② drying and preheating of coal powder, ③ low-temperature carbonization, ④ collection and treatment of carbonization gas and tar, ⑤ Coke powder treatment, etc. The raw coal after low-temperature carbonization treatment has high added value and wide range of products, but the traditional low-temperature carbonization process has a certain degree of unreasonableness in the waste gas treatment and heat recovery in the whole process, and the products produced by it have medium and high added value. The proportion of the value is low, and the comprehensive efficiency...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B53/04C10B49/16C10B57/10
CPCY02P20/129
Inventor 王玥
Owner 河北邦农电子商务有限公司
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