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Method for generating power by gasifying integrated straws in supercritical coal-fired generator set

A generator set, supercritical technology, applied in combustion engines, internal combustion piston engines, granular/powdered fuel gasification, etc., can solve the problems of auger feeding equipment stuck, core components damaged, etc., to facilitate the storage and transportation of raw materials, Reduce the floor area and avoid the effect of impact

Inactive Publication Date: 2011-04-13
NORTH CHINA ELECTRIC POWER UNIV (BAODING) +1
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Problems solved by technology

[0005] (3) The auger feeding equipment often gets stuck and causes damage to core components
However, the raw materials used are mainly wood chips, wood chips and other forestry wastes, while agricultural wastes are mainly used in my country, so it is difficult to copy this model into the country, and it is necessary to make appropriate modifications

Method used

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  • Method for generating power by gasifying integrated straws in supercritical coal-fired generator set
  • Method for generating power by gasifying integrated straws in supercritical coal-fired generator set

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Embodiment Construction

[0028] The entire pulverized coal power generation unit integrated straw gasification power generation system operates in the mode of one pulverized coal furnace and one or more gasifiers. In this example, it is a belt-one mode, such as figure 1 shown.

[0029] In view of the possibility that the moisture content of the biomass package may be too high, the belt drying conveyor adopted in this embodiment also has a drying function. After the biomass straw bag is transported to the site, it is broken up by the belt drying conveyor 9 through the straw bag breaking device 8 and thrown into the gasifier 7 for gasification. Packing density is about 200kg / m 3 , The size of the material bag is determined by the size of the gasifier, and the section of a single material bag is generally not more than 50% of the bed area of ​​the gasifier. A part of exhaust gas from the boiler tail (about 100°C) is used as a desiccant, and the hot flue gas is dried on the way of the conveying section....

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Abstract

The invention discloses a method for generating power by gasifying integrated straws in a supercritical coal-fired generator set. The method comprises the following steps of: packing and forming biomass straws serving as a gasification raw material of a gasifier of a bubbling fluidized bed, wherein primary wind-heat air surplus in a power station and tail gas fume of a boiler are used as gasifying agents. A biomass gasifier is effectively integrated by simply modifying the conventional supercritical unit to make biomass gasified, combusted and generate power, so that the defect that the biomass is directly blended and combusted is effectively overcome, the influence of biomass ash on fly ash is avoided, and the problem that the conventional auger feeding equipment is easy to damage is solved; therefore, biomass energy can be efficiently utilized and pollutant emission of coal-fired power stations is further reduced.

Description

technical field [0001] The invention belongs to the technical field of biomass gasification and recombustion, and in particular relates to a power generation method for realizing recombustion of biomass gas by using gas generated from crop stalks such as rice stalks and wheat stalks. Background technique [0002] Traditional coal-fired power plants will produce a lot of air pollutants. Nowadays, coal and other fossil energy sources are increasingly depleted. Using biomass for power generation is an effective way to alleviate the primary energy shortage. From the perspective of technology and cost, the co-combustion technology of biomass and coal is still one of the main ways to utilize biomass energy, but it brings new problems, such as [0003] (1) It is difficult to make biomass powder, and the proportion of fly ash combustibles increases; [0004] (2) Biomass ash (especially straw-like biomass ash) affects the utilization of fly ash; [0005] (3) The auger feeding equip...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10J3/56C10J3/72C10J3/84F02B43/10
CPCY02T10/32Y02E20/18Y02P20/129Y02P20/54Y02T10/12Y02T10/30
Inventor 阎维平鲁许鳌沈冶袁光福何培红黎泽元胡志波蒋国平
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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