Indirect heating system with upgrading of ultra-fine fuel particles

A heating system and particle technology, which is applied in the direction of the burner for burning powder fuel, fuel supply, solid fuel pretreatment, etc., can solve the problems such as the difficulty of selecting the injection area and the inability to use particles, and achieve the effect of saving fuel costs

Inactive Publication Date: 2006-02-22
GENERAL ELECTRIC TECH GMBH
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Problems solved by technology

Therefore, the selection of the injection area is particularly difficult and requires a lot of experience
[0010] If the exhaust is vented to the atmosphere, in the case of hard-to-burn fuels, since they are lower volatile substances, the ultrafine particles from the dust collector mix with the coarser particles in the intermediate silo, so these modified particles cannot Be exploited

Method used

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  • Indirect heating system with upgrading of ultra-fine fuel particles
  • Indirect heating system with upgrading of ultra-fine fuel particles
  • Indirect heating system with upgrading of ultra-fine fuel particles

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Embodiment Construction

[0032] Existing indirect heating systems1( figure 1 and 2) includes the silos 2 where the raw fuel is stored, and the raw fuel reaches the grinder 3 through a pipe 20 where it is ground and dried by extremely hot air or gas coming through a pipe 21 . The pulverized fuel obtained is conveyed through the pipe 30 under the action of compressed air to the separator 4 which intercepts only the coarse particles and returns them through the pipe 40 to the inlet of the grinder 3 . Other particles are sent through pipe 41 to one or more cyclones 5 functioning to intercept pulverized fuel, after which these particles are released into an intermediate storage silo 6 and then sent through pipe 51 to the main combustion chamber 7. The burner 70 is to be fired. The gases leaving the cyclone 5 are returned to the circuit through the duct 50 and the fan 42 .

[0033] The milling system receives hot air or gas through duct 21 and itself generates residual gas (for example water vapor from e...

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Abstract

The invention relates to an indirect heating system in which a solid fuel circulates in the form of particles. The inventive system comprises a grinding station, a furnace ( 7 ), at least one intermediate silo, a separator, at least one cyclone and, optionally, a gas recirculation fan. The invention is characterised in that a dust extractor ( 10 ) captures the finest particles which are subsequently introduced into the furnace ( 7 ) by means of at least one specific conduit ( 52 ) and burnt by at least one specific burner ( 71 ). The aforementioned ultra-fine particles are then stored in a specific silo ( 10 ), dosed into a feeding device ( 61 ), mixed in well defined proportions with hot air and conveyed to the specific burner ( 71 ) through the specific conduit ( 52 ).

Description

technical field [0001] This invention relates to indirect heating systems designed for burning solid fuels. This system is characterized in that an intermediate silo for storing pulverized fuel is provided between the solid fuel grinding station and the combustion chamber. This type of system is used for fuels that are more difficult to burn, such as anthracite or fuels with low volatility (for example, low volatility bituminous coal as defined by the American Society for Testing and Materials (ASTM)), because the system completely separates and The grinding of solid fuels is optimized, on the other hand the combustion of said pulverized fuels is optimized. Background technique [0002] There are various indirect heating systems: those that return the exhaust gas (the product obtained by separating the pulverized fuel and the gas used to dry and transport said fuel) back to the combustion chamber and those that vent the exhaust gas into the atmosphere. [0003] These syste...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23K1/00F23D1/02
CPCF23K1/00F23K2201/103F23K2203/201F23K2201/101F23K2201/30F23D1/02
Inventor 佛朗科伊斯·马劳比尔让-米歇尔·托尼尔
Owner GENERAL ELECTRIC TECH GMBH
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