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Low-nitrogen combustion device based on brown coal

A low-nitrogen combustion, lignite technology, applied in the combustion method, combustion equipment, combustion air/fuel supply and other directions, can solve the problems of low nitrogen transformation effect is not obvious, increase the primary air rate, etc., to solve the boiler low nitrogen transformation Difficulty, the effect of reducing the primary air volume and increasing the primary air temperature

Inactive Publication Date: 2016-02-24
XIAN AEROSPACE SOURCE POWER ENG CO LTD
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Problems solved by technology

[0004] The object of the present invention is to provide a low-nitrogen combustion device based on lignite, which can effectively overcome the problem of ensuring combustion when burning high-moisture lignite by adding a heating device in the primary air duct and adjusting the proportion relationship of each air supply. Stable, to ensure the temperature of pulverized coal particles, increase the primary air rate, and solve the shortcomings of traditional low-nitrogen transformation effects that are not obvious

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  • Low-nitrogen combustion device based on brown coal
  • Low-nitrogen combustion device based on brown coal

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Embodiment Construction

[0020] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.

[0021] Such as figure 1 As shown, in order to ensure the stability of combustion, the primary air rate of the boiler burning lignite is relatively high. The low-nitrogen transformation method of the traditional vertical air classification is not effective due to the limited air distribution. At this time, a heating device is installed in the primary air duct to increase the temperature of the primary air. While ensuring combustion stability, the rate of the primary air can be greatly reduced, providing enough space for the air distribution of the low-nitrogen transformation.

[0022] Specifically, a lignite-based low-nitrogen combustion device includes: a primary air supply device, the primary air supply device is connected to a burner through a...

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Abstract

The invention discloses a low-nitrogen combustion device based on brown coal. The low-nitrogen combustion device comprises a primary air supply device, a secondary air supply device and a first channel. The primary air supply device is connected with a combustor through a first pipeline. The first pipeline is connected with an over fire air cavity through a first branch. The secondary air supply device is connected with the over fire air cavity through a second pipeline, and the second pipeline is connected with the combustor through a third pipeline. The first channel is provided with a heater and used for increasing the primary air temperature. According to the device, a heating device is additionally arranged in a primary air flue, the proportion relation of various kinds of air supply is adjusted, the combustion stability and temperature of pulverized powder particles can be effectively ensured when high-moisture brown coal is combusted, the primary air rate is increased, and the defect that a traditional low-nitrogen improvement effect is not obvious is overcome.

Description

technical field [0001] The invention belongs to pulverized coal combustion technology, in particular to a lignite-based low-nitrogen combustion device. Background technique [0002] Energy saving and emission reduction has become an important topic in today's society, especially desulfurization and denitrification. In order to control the emission level of NOx pollutants from coal-fired thermal power plants, China has successively issued standards and regulations such as "Emission Standards of Air Pollutants for Thermal Power Plants", "Law of the People's Republic of China on Air Pollution Protection", "Emission Standards of Air Pollutants for Thermal Power Plants", Thermal power plants are required to take measures to control NOX emissions. Due to the improvement of national environmental protection standards, the NOX emission standards for boilers are more stringent. [0003] For different coal qualities, the combustion characteristics are not the same, and the difficult...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23L15/00F23L1/00F23L9/00
CPCF23L1/00F23L9/00F23L15/00Y02E20/34
Inventor 周楠池保华仲伟聪杨国华刘丹张晓明丁朝阳
Owner XIAN AEROSPACE SOURCE POWER ENG CO LTD
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