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Coal gasification system and coal gasification method

A coal gasification and gas technology, applied in the field of coal gasification system, can solve problems such as tar blockage, pyrolysis gasification reactor cannot operate normally, etc., and achieve the effect of improving the temperature reduction in the furnace and realizing miniaturization

Active Publication Date: 2014-08-20
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 A 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 synthesis gas mainly composed of hydrogen and carbon monoxide gas, and finally produces products such as methane, methanol, and ammonia from the synthesis gas. As the coal used in the coal gasification system 1 of the present embodiment, sub-bituminous coal or lignite coal containing 20% ​​or more water by weight can be used.

[0048] Coal gasification system 1 includes coal drying and crushing equipment (drying device) 2, coal supply equipment 3, coal gasification reaction furnace 4, heat recovery equipment 5, coal coke recovery equipment 6, shift reaction equipment 7, gas refining equipment 8, chemical synthesis Plant 9 and air separation plant 10.

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

no. 2 Embodiment approach

[0114] Next, a second embodiment of the present invention will be described. The same reference numerals are assigned to the same portions as those of the first embodiment described above, and description thereof will be omitted, and only points that are different from the first embodiment will be described.

[0115] Such as Figure 6 As shown, the coal gasification system 41 of the present embodiment includes, in addition to the components of the coal gasification system 1 of the first embodiment, a device for adjusting the moisture content in 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 a calculation unit which are 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 temperature of the temperature sensor of the pulveri...

Embodiment 1

[0129] Using the above-mentioned coal gasification system 1, the temperature in the partial oxidation part 26 is set to 1300°C, and the moisture content supplied from the gasification burner 30 to the partial oxidation part 26 is adjusted to 18% of the moisture content of the coal and oxygen-containing gas (this In the embodiment, the flow of oxygen) is respectively 650 (kg / h), 345 (Nm 3 / h). No water vapor was supplied to the partial oxidation unit 26 .

[0130] In addition, the drying unit uses image 3 The shown device doubles as a pulverizer, which dries and pulverizes coal into a granular shape of 10 μm or more and 100 μm or less.

[0131] It can be seen that under this condition, tar does not adhere to the through-holes 27 when the moisture-controlled coal 150 (kg / h) with a moisture content of 18% is supplied from the nozzle unit 31 to the pyrolysis unit 28 and no steam is supplied.

[0132] In this way, in the coal gasification system 1 of the embodiment of the prese...

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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 for producing products such as methane by using coal as a raw material. [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] Conventionally, in order to efficiently produce combustible gas by gasifying coal, coal gasification systems including 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. This coal gasification system includes a pyrolysis gasification reactor (upper reaction vessel) for pyrolyzing coal, a heat exchanger for recovering sensible heat from gas, etc. A cyclone for coal char (char: ungasified co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10J3/46C10J3/48
CPCC10J2300/0909C10K1/003C10J2300/0956C10J3/485C10J3/723C10J2300/093C10J3/466C10J2300/0959C10K3/04C10J2300/1678C10J2200/152C10J2300/1656C10J2300/0906C10J3/721
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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