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Method for transforming coal-fired boiler into biomass fuel boiler

A coal-fired boiler, material technology, applied in the direction of combustion methods, solid fuel combustion, non-flammable liquid/gas transportation, etc., can solve the problems of energy waste, high exhaust gas temperature, affecting thermal efficiency, etc., to increase flame residence time , High combustion thermal efficiency, and the effect of improving thermal efficiency

Active Publication Date: 2020-05-15
江华
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Firstly, because the secondary air moves upward along the water-cooled wall, an air curtain is formed on its near surface, thereby reducing the heat transfer effect; secondly, the secondary air supply is cold air, which will reduce the furnace temperature and affect the thermal efficiency when injected into the furnace; secondly , because of the addition of secondary air, the flame of fuel combustion is higher than normal combustion, and the flame is easily sucked into the convection heat exchange section under the action of induced wind, increasing the thermal load of the boiler body, causing cracks, and burying potential safety hazards
Finally, the exhaust gas temperature is also higher, resulting in energy waste

Method used

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  • Method for transforming coal-fired boiler into biomass fuel boiler
  • Method for transforming coal-fired boiler into biomass fuel boiler
  • Method for transforming coal-fired boiler into biomass fuel boiler

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Please refer to Figure 1-Figure 2 ,specific Figure 1-Figure 2 As shown, this embodiment provides a method for transforming a coal-fired boiler into a biomass fuel boiler, including the following steps:

[0040] S1, set the front wall 1 connected to the feeding port 10 obliquely to guide the flame, and the connection between the front wall and the side wall is provided with a flame angle 8, the purpose is to guide the running direction of the flame from upward to backward and increase the flame retention Time, forming flame stream 11;

[0041] S2, the furnace arch above the grate 14 is transformed into the lower furnace arch 12 and the upper flue 4, the upper flue 4 is arranged on the lower furnace arch 12, the lower furnace arch 12 is installed obliquely, and the end of the lower furnace arch 12 is close to the feeding port 10 The lower furnace arch 12 is provided with a supplementary air hole 5, the upper flue 4 communicates with the lower furnace arch 12 through t...

Embodiment 2

[0053] Please refer to figure 1 , Figure 3-Figure 4 , specifically as figure 1 , Figure 3-Figure 4 As shown, the transformation steps of S1-S3 of this embodiment are completely consistent with Embodiment 1, and the difference technical feature lies in the specific setting of the upper flue in the step of S2;

[0054] S1, set the front wall 1 connected to the feeding port 10 obliquely to guide the flame, and the connection between the front wall and the side wall is provided with a flame angle 8, the purpose is to guide the running direction of the flame from upward to backward and increase the flame retention Time, forming flame stream 11;

[0055] S2, the furnace arch above the grate 14 is transformed into the lower furnace arch 12 and the upper flue 4, the upper flue 4 is arranged on the lower furnace arch 12, the lower furnace arch 12 is installed obliquely, and the end of the lower furnace arch 12 is close to the feeding port 10 The lower furnace arch 12 is provided ...

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Abstract

The invention provides a method for transforming a coal-fired boiler into a biomass fuel boiler. The method comprises the following steps that 1, a front wall connected with a feeding port is obliquely arranged to guide a flame, and an arch nose is arranged at the joint of the front wall and a side wall so as to guide the running direction of the flame from the upward direction to the downward direction and prolong the flame detention time to form a flame flow; 2, a furnace arch above a furnace grate is transformed into a lower furnace arch and an upper flue, the upper flue is arranged on thelower furnace arch, the lower furnace arch is obliquely arranged, the end, close to the feeding port, of the lower furnace arch is high, the other end is low, the lower furnace arch is provided with an air supplementing hole, the upper flue communicates with the lower furnace arch through the air supplementing hole, and the upper side of the end, close to the arch nose, of the upper flue is provided with a flue channel; and 3, the lower furnace arch in the step 2 is provided with an isolating structure, the lower furnace arch is divided into an igniting zone and an air supplementing zone, andthe air supplementing hole is formed in the air supplementing zone. The method for transforming the coal-fired boiler into the biomass fuel boiler has the characteristics of being high in combustion heat efficiency, good in safety performance and low in transformation difficulty and is suitable for the technical field of boiler transformation.

Description

technical field [0001] The invention relates to the technical field of boiler transformation, in particular to a method for transforming a coal-fired boiler into a biomass fuel boiler. Background technique [0002] With the adjustment of the national energy structure and environmental protection requirements, a large number of coal-fired boilers have been included in the elimination list, and coal-to-gas conversion is being carried out everywhere. More than 80% of my country's energy structure is coal-fired. The second is fuel oil, biomass pellets and natural gas. Coal and oil have emissions of sulfur, phosphorus, and nitrogen oxides. Natural gas is a scarce resource and relies heavily on imports. Therefore, biomass pellet fuel is currently the best backup energy and transitional energy. Biomass pellet fuel is easy to obtain, has high calorific value, small ash content, and basically no sulfur and phosphorus emissions. [0003] Therefore, by transforming coal-fired boilers...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23M5/06F23B80/04F23B10/00F23L9/00
CPCF23M5/06F23B80/04F23B10/00F23L9/00
Inventor 江华
Owner 江华