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Biomass low-nitrogen combustion boiler based on local gasification technology

A low-nitrogen combustion and biomass technology, applied in the direction of controlled combustion, combustion methods, combustion equipment, etc., can solve the problems of low combustion efficiency of small biomass boilers and high emission of nitrogen oxides in flue gas, so as to reduce black smoke and improve combustion degree, the effect of promoting NOx content

Pending Publication Date: 2021-06-25
QINGDAO TECHNOLOGICAL UNIVERSITY
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  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the problems existing in the prior art, the present invention provides a biomass low-nitrogen combustion boiler based on partial gasification technology, which can achieve the goal of clean and efficient combustion, and solve the problem of low combustion efficiency and flue gas nitrogen oxide emissions of small biomass boilers. high technical issues

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  • Biomass low-nitrogen combustion boiler based on local gasification technology

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Embodiment 1

[0023] The present invention provides a biomass low-nitrogen combustion boiler based on partial gasification technology, including a front steam spray system and a rear steam spray system: wherein, the front steam spray system is located at the front arch 1 of the boiler, and the rear steam spray system is located at Boiler rear arch 2, both of which are connected to the heat exchange tube bundle / steam drum of the boiler. The front steam spray system is equipped with front valve 1-1, front air guide pipe 1-2, front distribution air pipe 1-3, front nozzle 1-4 and thermocouple 1-5; the rear steam spray system is equipped with rear valve 2-1 , rear air guide pipe 2-2, rear distribution air pipe 2-3, rear nozzle 2-4 and thermocouple B2-5.

[0024] The front arch 1 is equipped with 1 front nozzle 1-4, and the rear arch is equipped with 2 rear nozzles 2-4. The angle between the front nozzle 1-4 and the grate 3 is 70°; the angle between the rear arch nozzle and the horizontal grate ...

Embodiment 2

[0032] The invention provides a biomass low-nitrogen combustion boiler based on partial gasification technology, the difference is that the front arch 1 is provided with two front nozzles 1-4, the rear arch is provided with three rear nozzles 2-4, and the front nozzles 1-4 The included angle with the fire grate 3 is 85°; the included angle between the rear arch nozzle and the horizontal fire grate is 110°.

[0033] The working process includes the following steps:

[0034] (1) Thermocouple A1-5 and thermocouple B2-5 monitor the flue gas temperature in the furnace in real time;

[0035] (2) When the detected temperature in the furnace is 1000°C higher than the set temperature of the front arch 1, the front valve 1-1 of the front steam spray system is opened, and the water vapor passes through the front air guide pipe 1-2, the front air distribution pipe 1-3, and Spray atomized water vapor to the combustion area in the furnace through the front nozzle 1-4; when the detected tem...

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Abstract

The invention discloses a biomass low-nitrogen combustion boiler based on a local gasification technology. According to the boiler, a front steam spraying system and a rear steam spraying system are arranged on a front arch and a rear arch correspondingly, and each steam spraying system is provided with a valve, a gas guide pipe, a gas distribution pipe, a spray head and a thermocouple. According to the biomass low-nitrogen combustion boiler, water vapor atomizing nozzles are arranged on the front arch and the rear arch, and atomized steam is sprayed to a high-temperature oxidation area in the boiler, so that biomass particles which are combusted are locally gasified, reducing gas is generated, NOx is reduced and removed in the combustion process, and the problem of emission of pollutants such as the NOx in a small biomass boiler is solved.

Description

technical field [0001] The invention belongs to the technical field of biomass boilers, in particular to a biomass low-nitrogen combustion boiler based on partial gasification technology. Background technique [0002] The heating method in the villages and towns in North China and Northeast my country is mainly based on loose coal. Biomass has the advantage of small pollutant emissions, and the development of biomass multi-source materials based on bulk coal replacement is an important direction for clean heating. Biomass resources such as agricultural and forestry wastes in rural areas of our country are abundant, widely distributed and diverse. Due to the diversity of fuel types, the phenomenon of poor fuel adaptability and high NOx concentration in the exhaust gas is common in the promotion process of biomass boilers. Under the increasingly stringent environmental protection policies, the existing biomass energy heating technology can no longer meet the environmental pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23L7/00F23N5/10
CPCF23L7/005F23N5/10F23N2225/08
Inventor 左宗良罗思义马金双孙慧萍任冬冬郭健翔张敬奎孙晋飞
Owner QINGDAO TECHNOLOGICAL UNIVERSITY
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