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Coal pyrolysis method and system

A pyrolysis and pyrolysis reactor technology, applied in the field of pyrolysis coal, can solve the problems of high tar yield, reduced processing cost, and high energy consumption, and achieve the effects of high tar yield, reduced processing cost, and high-efficiency pyrolysis

Pending Publication Date: 2016-02-17
SHENWU TECH GRP CO LTD
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  • Claims
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Problems solved by technology

For this reason, an object of the present invention is to propose a kind of method and system of pyrolysis coal, and this method can realize the efficient pyrolysis of coal, and tar yield rate is high, can solve the difficult problem of high energy consumption in the prior art simultaneously, thereby Effectively reduce processing costs

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  • Coal pyrolysis method and system
  • Coal pyrolysis method and system
  • Coal pyrolysis method and system

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Embodiment

[0097] refer to Figure 12 , store lignite in coal bunker 1, and then store lignite (V d =41.35%, Q gr,d =24.8MJ / kg) is supplied to the drying bin 2 for drying treatment, and then the dried lignite (moisture<8%) is supplied to the rotary bed pyrolysis reactor 4 through the radiation heating tube 15 on the rotary bed pyrolysis The lignite in the reactor 4 is radiated and heated to undergo a pyrolysis reaction (500-650° C.) (the product yield is shown in Table 1), and the resulting oil-gas mixture enters the high-temperature dust collector 5 through the pipe at the top of the rotating bed pyrolysis reactor 4 Purify to obtain dust-removed oil gas and semi-coke particles, then pass the dust-removed oil gas into the oil-gas cooler 6 to cool down, and obtain coal tar and raw coal gas after separation, and the raw coal gas is partially sent to the combustion bed 8 after being purified by the raw coal gas purification unit 7 Combustion after mixing with the air from the fan 9, heati...

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Abstract

The invention discloses a coal pyrolysis method and system. The method comprises the steps that 1, coal is pyrolyzed in a revolving bed pyrolysis reactor to obtain a gas-oil mixture and pyrolysis semicoke; 2, the gas-oil mixture is cooled to obtain tar and coal gas; 3, some pyrolysis semicoke and some coal gas are combusted with air to obtain heat supply smoke and ash; 4, the ash is returned to the step 1 to be mixed with coal to be supplied to the revolving bed pyrolysis reactor, and the heat supply smoke is returned to a radiation heating pipe of the revolving bed pyrolysis reactor in the step 1 to be used as a heat source, so that cooled smoke is obtained. By the adoption of the method, efficient pyrolysis of coal is achieved, the tar yield is high, meanwhile, the problem of the high energy consumption in the prior art can be solved, and therefore the disposal cost is effectively reduced.

Description

technical field [0001] The invention belongs to the field of chemical industry, in particular, the invention relates to a method and system for pyrolyzing coal. Background technique [0002] With the increasing domestic energy demand and the sharp decline in high-quality coal resources, in the foreseeable future, the transformation and comprehensive utilization of low-rank coal represented by lignite will become the potential to support future energy demand. In recent years, a lot of research has been carried out on lignite upgrading and utilization technology at home and abroad, with the purpose of improving coal quality, improving the economy and safety of lignite utilization, and expanding its application range. At present, there are many schools of low-rank coal utilization technologies, and their levels are uneven. Some have already carried out small-scale industrialization demonstrations, and most are still in the stage of laboratory research. There is a lack of object...

Claims

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Application Information

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IPC IPC(8): C10B53/04C10G1/00C10B57/00B01D53/26F23J15/08F23J15/02
Inventor 裴培孙宝林刘周恩吴道洪
Owner SHENWU TECH GRP CO LTD
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