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Coal gasification system and coal gasification method

A technology of coal gasification and gas, applied in the field of coal gasification system, can solve the problems of pyrolysis gasification reaction furnace not working normally, tar blockage, etc., and achieve the effect of improving the temperature reduction in the furnace and realizing miniaturization

Active Publication Date: 2013-01-23
NIPPON STEEL & SUMIKIN ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the amount of tar attached increases, there is a possibility that the tar will eventually clog a part of the pyrolysis gasification reactor, and the pyrolysis gasification reactor will not operate normally.

Method used

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  • Coal gasification system and coal gasification method
  • Coal gasification system and coal gasification method
  • Coal gasification system and coal gasification method

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0047] Below, refer to Figure 1 to Figure 5 The first embodiment of the coal gasification system of the present invention will be described. Such as figure 1 As shown, the coal gasification system 1 is a complete set of equipment that uses coal as a raw material to synthesize a synthetic gas mainly composed of hydrogen and carbon monoxide gas, and finally produces products such as methane, methanol, and ammonia from the synthetic gas. As the coal used in the coal gasification system 1 of the present embodiment, sub-bituminous coal or lignite that contains 20% or more moisture by weight can be used.

[0048] The coal gasification system 1 is equipped with coal drying and crushing equipment (drying device) 2, coal supply equipment 3, coal gasification reactor 4, heat recovery equipment 5, coal char recovery equipment 6, shift reaction equipment 7, gas purification equipment 8, chemical synthesis Equipment 9 and air separation equipment 10.

[0049] Such as figure 2 As shown, the ...

no. 2 Embodiment approach

[0114] Next, the second embodiment of the present invention will be described. The same parts as those in the first embodiment described above are given the same reference numerals and their descriptions are omitted, and only the points different from the first embodiment will be described.

[0115] Such as Image 6 As shown, the coal gasification system 41 of the present embodiment includes, in addition to the various components of the coal gasification system 1 of the first embodiment, a device for adjusting the amount of moisture in the coal based on the pressure difference measured by the pressure measuring device 33 Control unit 42.

[0116] The control unit 42 includes a memory and an arithmetic unit not shown. The control unit 42 is electrically connected to the temperature sensors of the pressure measuring device 33, the drying unit 13 and the crushing unit 14. Stored in memory Figure 4 The relationship between the temperature of the temperature sensor of the crushing un...

Embodiment 1

[0129] Using the coal gasification system 1 described above, the temperature in the partial oxidation section 26 is set to 1300°C, and the moisture content supplied from the gasification burner 30 to the partial oxidation section 26 is 18%. The flow rate of oxygen in the example is 650 (kg / h), 345 (Nm 3 / h). Water vapor is not supplied to the partial oxidation part 26.

[0130] In addition, the drying device uses image 3 The illustrated device doubles as a pulverizer, and the coal is dried and pulverized to a granular shape of 10 μm or more and 100 μm or less.

[0131] It can be seen that under this condition, when the moisture-regulated coal 150 (kg / h) with a moisture content of 18% is supplied from the nozzle section 31 to the pyrolysis section 28 and steam is not supplied, tar does not adhere to the through hole 27.

[0132] In this way, in the coal gasification system 1 of the embodiment of the present invention, even if devices such as steam nozzles and steam supply pumps are ...

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Abstract

Disclosed are a coal gasification system and a coal gasification method, comprising a drying apparatus which turns subbituminous coal or brown coal into moisture-regulated coal by drying until same contain a specified moisture content; and a coal gasification reaction furnace which produces at least hydrogen gas and carbon monoxide gas by burning the moisture-regulated coal. The specified moisture content is set to a quantity such that when the moisture vapour emitted from the moisture-regulated coal and tar are chemically reacted, the tar does not stick inside through holes.

Description

Technical field [0001] The present invention relates to a coal gasification system and a coal gasification method that uses coal as a raw material to produce products such as methane. [0002] This application claims priority based on Japanese Patent Application No. 2010-095497 for which it applied in Japan on April 16, 2010, and uses the content here. Background technique [0003] In the past, in order to efficiently produce combustible gas and the like by gasifying coal gas, coal gasification systems having coal gasification reactors of various configurations such as fixed bed type, fluidized bed type, and entrained bed (spouted bed) type have been studied. [0004] As one of them, for example, a coal gasification system disclosed in Patent Document 1 is known. The coal gasification system is equipped with a pyrolysis gasification reactor (upper reaction vessel) that pyrolyzes coal, a heat exchanger that recovers sensible heat from the gas generated by the pyrolysis gasification r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10J3/46C10J3/48
CPCC10J3/46C10J3/48C10J3/466C10J3/485C10J3/721C10J3/723C10J2200/152C10J2300/0906C10J2300/0909C10J2300/093C10J2300/0956C10J2300/0959C10J2300/1656C10J2300/1678C10K1/003C10K3/04
Inventor 小水流广行小菅克志糸永真须美矢部英昭武田卓幸良之并木泰树
Owner NIPPON STEEL & SUMIKIN ENG CO LTD
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