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Coal destructive distillation method and apparatus

A dry distillation and discharge device technology, applied in the field of coal chemical industry, can solve the problems of high mixing ratio of high-temperature coal ash and pulverized coal raw materials, inability to flexibly adjust and control the temperature, and large charcoal-burning load of the charcoal burner, so as to improve the utilization value, Guarantee the effect of long-term operation and reduction of energy consumption of the device

Active Publication Date: 2014-08-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] The purpose of the present invention is to provide a coal dry distillation method and device to solve the problems of the existing coal powder dry distillation device that the charcoal burner has a large charcoal burning load and the temperature cannot be flexibly adjusted and controlled, and the mixing ratio of high-temperature coal ash and coal powder is high. Problems such as low content of discharged semi-coke and high energy consumption

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  • Coal destructive distillation method and apparatus
  • Coal destructive distillation method and apparatus
  • Coal destructive distillation method and apparatus

Examples

Experimental program
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Effect test

Embodiment 1

[0091] The properties of the pulverized coal raw material used in the embodiment are shown in Table 3.

[0092] The dry distillation of pulverized coal is carried out on a laboratory fluidized bed device. The semi-coke is burned in a tube type and then enters the charcoal burner for charcoal burning. The regenerated semi-coke enters the charcoal burner and the temperature of the charcoal burner is controlled by the main air volume. The stripping medium in the stripping section of the dry distillation reactor is water vapor, and the stripping temperature is 500°C. The operating conditions, product distribution and properties of some products of the pulverized coal carbonization device in this embodiment are shown in Table 4.

Embodiment 2

[0094] According to Example 1, the difference is the temperature of the charcoal burner, the time of the charcoal burner, the weight ratio of the pulverized coal raw material to the high-temperature coal ash, the carbonization temperature of the carbonization reactor, the carbonization time of the carbonization reactor, and the gas line of the pulverized coal raw material feed pipe. Speed, pulverized coal raw material feed pipe residence time, tubular charcoal burner temperature, tubular charcoal burner burning time, tubular charcoal burner line speed. See Table 5 for the operating conditions, product distribution and some product properties of the pulverized coal carbonization device in this embodiment.

Embodiment 3

[0096] According to Example 1, the difference is the temperature of the charcoal burner, the time of the charcoal burner, the weight ratio of the pulverized coal raw material to the high-temperature coal ash, the carbonization temperature of the carbonization reactor, the carbonization time of the carbonization reactor, and the gas line of the pulverized coal raw material feed pipe. Speed, pulverized coal raw material feed pipe residence time, tubular charcoal burner temperature, tubular charcoal burner burning time, tubular charcoal burner line speed. See Table 6 for the operating conditions, product distribution and some product properties of the pulverized coal carbonization device in this embodiment.

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Abstract

The invention discloses a coal destructive distillation method and a coal destructive distillation apparatus. The method and apparatus are characterized in that: a coal powder raw material is arranged in a tubular charcoal burning device and is arranged coaxially therewith; the charcoal burning device is arranged on the upper part of a destructive distillation reactor; high-temperature coal ash from the charcoal burning device is delivered downwards and enters a high-temperature coal ash delivery pipe; in the high-temperature coal ash delivery pipe, the high-temperature coal ash is mixed with the coal powder raw material (with a particle size no larger than 3mm) entering the destructive distillation reactor from a feeding pipe, and is subjected to heat transfer; the mixture enters the destructive distillation reactor and is subjected to a destructive distillation reaction; oil gas generated by the reaction is subjected to separation and stripping; separated and stripped oil gas is subjected to fractionation; part of the semi-coke obtained after separation and stripping is subjected to heat extraction and is discharged from the apparatus; and another part of the semi-coke enters the tubular charcoal burning device and is subjected to charcoal burning, such that regenerated semi-coke is obtained; the regenerated semi-coke enters the charcoal burning device and further charcoal burning is carried out; produced high-temperature coal ash is recycled as a supplementary heat source of destructive distillation of the coal ash raw material in the destructive distillation reactor. The method and the apparatus provided by the invention is especially suitable for destructive distillation processing of various coal powder raw materials, and has the advantages of continuous and stable operation, flexible adjustment, and the like.

Description

technical field [0001] The invention belongs to the field of coal chemical industry and relates to a dry distillation method and device for coal. Background technique [0002] With the increasing scarcity of world oil resources and the advent of the era of high oil prices, the use of coal dry distillation technology to produce coal tar to replace oil resources has become an important supplementary program. Carbon is the most important constituent element in coal. The carbon content increases with the degree of coalification, peat is 50-60%; lignite is 60-77%; bituminous coal is 74-92%; anthracite is 90-98%. Hydrogen is the second important constituent element in coal. The hydrogen content of sapropelic coal is higher than that of humic coal, generally above 6%, sometimes up to 11%. Coal chemical industry is mainly used to replace petrochemical products, such as diesel oil, gasoline, aviation kerosene, liquefied petroleum gas, ethylene raw materials, polypropylene raw materi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10B53/04C10B49/22C10B57/00
Inventor 王文柯陈章淼
Owner CHINA PETROLEUM & CHEM CORP
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