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Downdraft type fixed bed gasifying steam power generation co-production device and process

A technology of fixed bed and production process, which is applied in the direction of gasification process, steam engine device, steam application, etc. It can solve the problems of small gasification power generation scale, high fuel cost, and large fuel transportation radius, so as to reduce operating costs and investment, The effect of improving economic efficiency and reducing investment costs

Active Publication Date: 2016-04-20
HEFEI DEBO BIOENERGY SCI & TECH
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  • Summary
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] my country's biomass is mainly straw, chaff and forestry waste. The existing biomass power generation methods mainly include gasification internal combustion generator set power generation and direct combustion power generation. The scale of gasification power generation is small and it is difficult to achieve large-scale industrialization. application, the scale of direct-fired power generation is relatively large, the fuel transportation radius is large, the fuel cost is high, and the comprehensive utilization of biomass raw materials has not been carried out. Power generation technology has high emissions of sulfur dioxide and nitrogen oxides, causing secondary pollution

Method used

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  • Downdraft type fixed bed gasifying steam power generation co-production device and process

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Embodiment 1

[0033] The raw material of almond husk is added from the top 103 of the furnace by the feeding device 101, the primary air required for almond husk gasification is sucked in by the primary tuyere 102, and the almond husk is pyrolyzed and gasified with the air under the radiation of the high temperature materials in the intermediate furnace body 107 The reaction produces biomass high-temperature pyrolysis gas and biochar with higher tar content. The pyrolysis gas at 330°C is drawn from the middle of the gasification furnace by the pyrolysis gas fan 113 and sent to the gas combustion chamber 201 for combustion. The secondary air used for biochar activation and ammonia-carrying water vapor enters the intermediate furnace body 107. The mass ratio of almond shell to ammonia is 260kg / kg, which reacts with biochar to obtain nitrogen-containing activated carbon with desulfurization characteristics and gasification Gas. The gasification gas at 460°C drawn from the lower part of the gasi...

Embodiment 2

[0035] The coconut shell raw materials are added from the furnace top 103 by the feeding device 101, the primary air required for coconut shell gasification is sucked by the primary tuyere 102, and the coconut shell is pyrolyzed and gasified with the air under the radiation of the high temperature materials in the intermediate furnace body 107 The reaction produces biomass high-temperature pyrolysis gas and biochar with higher tar content. The high-temperature pyrolysis gas is drawn from the middle of the gasifier by the pyrolysis gas fan 113 and sent to the gas combustion chamber 201 for combustion. The secondary air used for biochar activation and ammonia-carrying water vapor enters the intermediate furnace body 107. The mass ratio of coconut shell to ammonia is 350kg / kg, which reacts with biochar to obtain nitrogen-containing activated carbon with desulfurization characteristics and gasification Gas. The 520℃ gasification gas extracted from the lower part of the gasification...

Embodiment 3

[0037] Sawdust raw materials are added from the furnace top 103 by the feeding device 101, and the primary air required for the gasification of the sawdust is sucked in by the primary tuyere 102. The sawdust undergoes pyrolysis and gasification reaction with the air under the radiation action of the high-temperature materials in the intermediate furnace body 107. The high-temperature pyrolysis gas and biochar of biomass with higher tar content are drawn from the middle of the gasifier by the pyrolysis gas fan 113 and sent to the gas combustion chamber 201 for combustion. The secondary air used for biochar activation and ammonia-carrying water vapor enters the intermediate furnace body 107. The mass ratio of coconut shell to ammonia gas is 370kg / kg, which reacts with biochar to obtain nitrogen-containing activated carbon with desulfurization characteristics and gasification Gas. The 420°C gasification gas extracted from the lower part of the gasifier carries powdered nitrogen-co...

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Abstract

The invention provides a downdraft type fixed bed gasifying steam power generation co-production device. The device comprises a gasifying system and a power generation system. The power generation system is driven by the gasifying system to work, and comprises a gas combustion chamber which is connected with a gas pyrolysis fan and a gas gasifying fan. An air preheater and a boiler heating face are arranged in a desulfuration chamber, the top of the desulfuration chamber is connected with a tail gas treatment device, a middle boiler body is connected with a low-pressure cylinder of a turbine through a pipeline, and a generator is mounted on the turbine. Biomass pyrolysis gas biomass charcoal-power co-production is based on the characteristic that the combustible components of biomass are composed of a volatile component and fixed carbon, a decoupling reaction mode is adopted, fixed carbon in biomass is converted into nitrogenous activated carbon with efficient desulfuration properties, the volatile component is converted into pyrolysis gas and gasified gas to be combusted, electric energy is obtained, macromolecular tar in the pyrolysis gas is utilized for reducing nitric oxide generated during gas combustion, and clean emissions of combustion tail gas are achieved.

Description

Technical field [0001] The invention relates to the technical field of biomass utilization, in particular to a downdraft fixed bed gasification steam power generation co-production device and process. Background technique [0002] With the increasingly prominent global energy and environmental issues, new energy development has become an urgent task. Biomass energy is rich in resources, can be converted into clean fuels, is the only renewable energy that can be stored and transported, and is the only renewable carbon source. It will play a role in meeting future social energy needs and promoting sustainable social development. Important role. There are many specific types of biomass, which mainly refer to wood, crops (straw, rice straw, wheat stalk, bean stalk, cotton stalk, chaff, etc.), weeds, algae, etc. my country’s biomass energy is also extremely rich. The biomass resources that can be developed as energy amount to more than 300 million tons of standard coal. With the dev...

Claims

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Application Information

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IPC IPC(8): C10J3/20C10J3/84C10J3/72F01K17/04
CPCY02P20/129C10J3/20C10J3/72C10J3/84C10J2300/1603C10J2300/1606C10J2300/1675F01K17/04
Inventor 张齐生张守军周建斌鲁万宝赵成武张守峰冯干吴银龙李益瑞胡鹏
Owner HEFEI DEBO BIOENERGY SCI & TECH
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