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Burner and coal upgrading plant

a coal upgrading and burner technology, applied in the direction of burners, combustion types, staged combustion, etc., can solve the problems of increasing the number of pipe stands, complicated pipes, and difficult to reduce the size of the plant, so as to reduce accidental misfire of flames

Inactive Publication Date: 2016-08-04
MITSUBISHI HEAVY IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent text describes a method to prevent accidental misfires of high-calorie gas flames caused by low-calorie gas in a burner and coal upgrading plant. This is achieved by placing a nozzle for the high-calorie gas in a position that is near to a nozzle for the low-calorie gas. This setup prevents any inert gas ejected from the low-calorie gas nozzle from interfering with the high-calorie gas flames.

Problems solved by technology

However, since it is necessary to individually feed air to each of the burners, for instance, the burner for the low-calorie gas and the burner for the high-calorie gas, pipes are complicated.
Further, since each of the burners is individually mounted on a wall surface of the combustion furnace via dedicated pipe stands, the number of pipe stands is increased and it is hard to reduce the size of the plant.

Method used

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  • Burner and coal upgrading plant
  • Burner and coal upgrading plant
  • Burner and coal upgrading plant

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Embodiment Construction

[0028]Hereinafter, a coal upgrading plant according to an embodiment of the present invention will be described.

[0029]FIG. 1 is a schematic constitutional view of the coal upgrading plant 1 in this embodiment.

[0030]The coal upgrading plant 1 in this embodiment is a plant that removes moisture, impurities, etc. contained in low-grade coal to mold the low-grade coal, and thereby converts the low-grade coal to high-grade coal.

[0031]As illustrated in FIG. 1, the coal upgrading plant 1 is mainly equipped with a crusher 2, a drier 3, a pyrolyzer 4, a combustion furnace 5, a quencher 6, a finisher 7, a kneader 8, and a briquetting device 9.

[0032]The crusher 2 crushes raw coal L, and thereby adjusts a size of the raw coal L to a size at which the raw coal L is easily processed in a subsequent process. The raw coal L, the size of which is adjusted by the crusher 2, is sent to the drier 3.

[0033]The drier 3 dries the raw coal L, the size of which is adjusted by the crusher 2. As this drier 3, ...

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Abstract

Provided is a burner that includes: a tubular first outer cylinder (20); a diffuser (21) disposed inside the first outer cylinder (20) and having an inner circumferential surface, a diameter of which gradually increases in a first direction; a first gas nozzle (22) configured to feed a first gas to a radial outer region of the diffuser (21) in the first direction; a second gas nozzle (23) disposed adjacent to the first gas nozzle (22) in a circumferential direction of the first outer cylinder (20) and configured to feed a second gas to the radial outer region of the diffuser (21) in the first direction; and an ignition torch (24) configured to ignite at least one of the second gas and the first gas.

Description

TECHNICAL FIELD[0001]The present invention relates to a burner and a coal upgrading plant.[0002]Priority is claimed on Japanese Patent Applications No. 2013-199699, filed on Sep. 26, 2013, the contents of which are incorporated herein by reference.BACKGROUND ART[0003]In coal upgrading plants that upgrade low-grade coal to high-grade coal, pyrolytic treatment is performed in some cases to remove impurities such as mercury contained in the low-grade coal. When this pyrolytic treatment is performed, a combustible gas is separated from the low-grade coal. In some cases, this combustible gas is burnt in a combustion furnace and is reused as a high-temperature gas. This high-temperature gas is sent to a jacket such as a rotary kiln as, for instance, a heat source for pyrolyzing the low-grade coal, and then is discharged to the outside via, for instance, an exhaust gas purifier.[0004]The combustible gas obtained from the low-grade coal is generally a low-calorie gas. For this reason, if th...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F23D14/22F23D14/48
CPCF23D17/00F23D14/22F23D14/48F23D2900/14481F23C2201/301F23C2900/06043F23D2207/00F23D14/70
Inventor YOKOHAMA, KATSUHIKOHAMADA, TSUTOMUATARASHIYA, KENJIOKAMOTO, AKIYASUUCHIMURA, HIROAKITAKENO, KENJI
Owner MITSUBISHI HEAVY IND LTD