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A method for optimizing combustion of a chain boiler

A chain boiler, a technology for optimizing combustion, applied in combustion methods, control combustion, combustion equipment, etc., can solve problems such as reducing combustion stability and boiler efficiency, increasing mechanical incomplete combustion loss, and increasing carbon content in fly ash. The equipment layout is convenient, the effect of reducing the heat loss of exhaust smoke and reducing the production of SO3

Inactive Publication Date: 2017-11-03
上海卫源节能环保科技有限公司
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Problems solved by technology

However, low-oxygen combustion will increase fly ash combustibles during actual operation, reduce combustion efficiency, and cause side effects such as coking in the furnace; traditional staged combustion will increase the carbon content of fly ash due to insufficient combustion and reduce boiler efficiency; If the amount of flue gas mixed in the gas recirculation technology is too high, it will increase the loss of mechanical incomplete combustion, reduce combustion stability and boiler efficiency. The flue gas recirculation rate of large boilers is usually controlled at 10% to 20%. For small chains Boiler flue gas recirculation rate is lower, therefore, only using flue gas recirculation technology to suppress NO X The resulting denitrification efficiency is very low

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  • A method for optimizing combustion of a chain boiler
  • A method for optimizing combustion of a chain boiler
  • A method for optimizing combustion of a chain boiler

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Embodiment Construction

[0053] The method for optimizing the combustion of chain boilers according to the present invention will be further described according to the specific embodiments and the accompanying drawings, but this description does not constitute an improper limitation of the present invention.

[0054] figure 1 Schematically shows the process flow of the chain boiler optimization combustion method described in the present invention in one embodiment, figure 2 The partial structure of the gas injection box adopted in this embodiment is shown, image 3 The structure of the bellows and the adjusting rod of the gas injection box adopted in this embodiment is illustrated, Figure 4 for image 3 left view of Figure 5 for image 3 A-A sectional view of, Figure 6 The structure of flue gas recycling in this embodiment is illustrated.

[0055] Such as figure 1 As shown, the chain boiler optimization combustion method of the present embodiment comprises the following steps (the process p...

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Abstract

The invention discloses a method for optimizing combustion of a chain boiler, which comprises the steps of: extracting air volume with a volume fraction of 15-25% from boiler combustion air and directly feeding it into the space above the grate of the chain boiler, and sending the remaining boiler combustion air to into the air distribution chamber at the lower part of the chain boiler grate; extract the flue gas after boiler combustion, cool down and increase the pressure of the flue gas, and send it into the air distribution chamber to mix with the boiler combustion air sent into the air distribution chamber , to supply chain boilers for combustion. The chain boiler optimization combustion method described in the present invention can be used to improve the denitrification efficiency of the chain boiler without reducing the efficiency of the chain boiler.

Description

technical field [0001] The invention relates to a method for optimizing and adjusting boiler combustion, in particular to a method for optimizing chain boiler combustion. Background technique [0002] Nitrogen oxides produced in the combustion of boilers are harmful and difficult to deal with air pollutants. X (Nitrogen oxides) emission requirements are more stringent, reducing NO in boiler flue gas X The emission (denitrification) of industrial boilers is an important and arduous task for industrial boiler flue gas treatment. [0003] NO produced during the combustion process of chain furnace coal X Mainly NO (nitric oxide) and NO 2 (nitrogen dioxide), and a small amount of N 2 O (nitrous oxide). According to NO X The formation mechanism can be divided into fuel type NO X , Thermal NO X and rapid NO X . [0004] Fuel type NO X : [0005] Nitrogen in coal is generally combined with various hydrocarbons in the state of nitrogen atoms to form nitrogen ring or chain...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23N3/00F23B80/02F23L1/00
Inventor 张宝源梁志祥胡平岗
Owner 上海卫源节能环保科技有限公司
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