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Low-load stable-combustion boiler combustor and combustion method and application thereof

A technology of stable combustion and boiler combustion, applied in the combustion method, combustion air/fuel supply, combustion using multiple fuels, etc., can solve the problems of increased incomplete combustion loss, low-load stable combustion characteristics, unsafe and reliable operation, etc. , to achieve the effect of good calorific value, avoid waste, reduce environmental pollution and greenhouse gas emissions

Active Publication Date: 2019-05-28
UNIV OF SHANGHAI FOR SCI & TECH
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Problems solved by technology

[0004] The purpose of the present invention is to solve a series of problems such as low furnace temperature, unstable combustion, increased loss of incomplete combustion, and unsafe and reliable operation during low-load combustion in the prior art. Improvement to improve the low-load stable combustion characteristics of inferior coal

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  • Low-load stable-combustion boiler combustor and combustion method and application thereof
  • Low-load stable-combustion boiler combustor and combustion method and application thereof
  • Low-load stable-combustion boiler combustor and combustion method and application thereof

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Embodiment Construction

[0034] Such as Figure 1-4 as shown, figure 1 The middle arrows indicate the direction of air flow respectively. A boiler burner with low load and stable combustion includes a burner 1 and a furnace 2. The primary air pipe 13 surrounding both sides of the secondary air pipe 12, the biomass fuel pipe 14 arranged close to the inner wall of the casing 11, and the burner 1 is arranged at the four corners of the furnace 2, wherein:

[0035] The secondary air nozzle 122 of the secondary air pipe 12 is arranged along the circular tangent direction of the furnace 2; the secondary air is ejected from the secondary air nozzle 122 to form tangential combustion.

[0036] The primary air nozzle 132 of the primary air pipe 13 is arranged along the radial direction of the furnace 2; the primary air is ejected from the primary air nozzle 132, carrying coal powder into the furnace for combustion.

[0037] The biomass fuel nozzle 142 of the biomass fuel pipe 14 is arranged along the center of...

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Abstract

The invention discloses a low-load stable-combustion boiler combustor which comprises combustor bodies and a hearth. The combustor body comprises a shell, a secondary air pipe arranged in the center of the shell, a primary air pipe surrounding the two sides of the secondary air pipe, a biomass fuel pipe tightly attached to the inner wall of the shell, and the combustor bodies are arranged on the four corners of the hearth. The invention further discloses a combustion method of the low-load stable-combustion boiler combustor. During full-load combustion of the hearth, a biomass fuel inlet is closed, only pulverized coal combustion is adopted for hearth combustion, biomass combustion is not adopted, and hearth slag is relieved. During low-load operation, pulverized coal entering the hearth is reduced, the temperature of the hearth is reduced, flame combustion is unstable, in order to ensure stable combustion, the biomass fuel inlet is opened for feeding biomass fuel, and it is ensured that flame combustion is stable by means of the characteristics that biomass is high in volatile component, easy to ignite and good in heating value.

Description

technical field [0001] The invention relates to the technical field of boiler burners, in particular to a low-load stable combustion boiler burner and its combustion method and application. Background technique [0002] Coal is an important energy and chemical raw material, and the energy structure dominated by coal will not change for a long time. Although my country's coal resources are abundant, with the utilization of resources and the reduction of coal resources, the proportion of low-quality coal has increased, accounting for about 20% of the total coal reserves, and with the continuous mining of coal resources, the quality of coal is declining year by year. In my country, low-quality coal is mainly used in power plant boilers for power generation. However, due to its poor composition, it will cause many problems when the boilers are burned. Taking flame-resistant anthracite as an example, its volatile matter content is low, the calorific value of volatile matter is a...

Claims

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Application Information

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IPC IPC(8): F23C1/06F23C5/08F23K3/02F23L1/00F23L9/00F23L15/00
CPCY02E20/34
Inventor 刘中毅金晶郑良倩朱以周张瑞璞杭伊煊于志浩赵健
Owner UNIV OF SHANGHAI FOR SCI & TECH
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