Energy-saving synergistic anti-blocking method and system based on air preheater bypass flue

An air preheater, bypass flue technology, used in combustion methods, lighting and heating equipment, indirect carbon dioxide emission reduction, etc.

Pending Publication Date: 2019-03-01
南京博沃科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] In order to solve a series of problems existing in the boiler air and smoke system after the current environmental protection requirements have been im

Method used

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  • Energy-saving synergistic anti-blocking method and system based on air preheater bypass flue
  • Energy-saving synergistic anti-blocking method and system based on air preheater bypass flue
  • Energy-saving synergistic anti-blocking method and system based on air preheater bypass flue

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] An energy-saving and efficiency-enhancing anti-clogging method based on the bypass flue of the air preheater. The air is heated by the bypass hot flue gas to a temperature above the acid dew point of the flue gas, and then sent to the cold end of the air preheater, which flows independently through the heat storage element to prevent the heat storage element from being clogged with dust.

[0052] The anti-blocking by bypassing the hot flue gas to heat the air above effectively overcomes the defects of the existing hot air circulation anti-blocking, and has significant advantages such as reducing the exhaust gas temperature, reducing the power consumption of the plant, and reducing the maintenance workload.

[0053] Such as figure 1 As shown, as an energy-saving and efficiency-enhancing anti-blocking system based on the air preheater bypass flue to realize the above method, it includes an air preheater and an inlet main flue and an outlet main flue arranged on the air pr...

Embodiment 2

[0059] Such as figure 2 As shown, it is basically the same as Embodiment 1, the difference is: in order to facilitate the isolation and maintenance of the bypass heat exchanger, and at the same time adjust the flow rate of the bypass flue gas, a bypass flue gas baffle door is provided on the bypass inlet flue, and the bypass flue gas baffle door is There is a bypass smoke isolation door on the road exit flue, and a bypass air isolation door on the bypass outlet air duct.

Embodiment 3

[0061] Such as image 3 As shown, it is basically the same as Embodiment 1, except that in order to save the power consumption of the anti-blocking ash fan, the inlet of the bypass anti-blocking ash fan is connected to the main air duct of the inlet through the bypass connection air duct.

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Abstract

The invention discloses an energy-saving synergistic anti-blocking method and system based on an air preheater bypass flue. The energy-saving synergistic anti-blocking method based on the air preheater bypass flue includes the steps that air is heated to the temperature higher than the smoke acid dew point temperature through bypass hot flue gas, then the air is conveyed to the cold end of an airpreheater, and the air independently flows through a heat storage element so as to prevent the heat storage element from being blocked by dust. According to the method, the air is heated through the bypass hot flue gas to prevent blocking, so that the defect of blocking prevention through hot air circulation in the prior art is effectively overcome. The method has the remarkable advantages that the smoke discharging temperature is reduced, the power consumption of a factory is reduced, and the maintenance workload is reduced. Furthermore, the related problems such as zero emission of desulfurization wastewater and desulfuration of a chimney are also solved, the collaborative effect is generated, the total investment cost is reduced, and the operation safety, environmental protection performance and economical efficiency of a boiler air and flue gas system are improved. The energy-saving synergistic anti-blocking system based on the air preheater bypass flue is small in operation energyconsumption, stable and reliable in operation, small in maintenance workload and good in the air preheater anti-blocking effect.

Description

technical field [0001] The invention relates to an energy-saving, efficiency-enhancing and anti-clogging method and system based on a bypass flue of an air preheater, and belongs to the technical field of comprehensive optimization of auxiliary equipment systems of power plant boilers. Background technique [0002] Rotary air preheater (referred to as "air preheater") is a heat exchange equipment used in large-scale power plant boilers. It uses the heat of boiler flue gas to heat the air required for combustion to improve the efficiency of the boiler. . After passing through the air preheater, the flue gas temperature is generally cooled from 300-400°C to 100-150°C, and the corresponding air temperature is generally heated from 0-50°C to 280-380°C. [0003] The air preheater utilizes the continuous rotation of the rotor loaded with heat storage elements to realize continuous heat absorption on the air side and continuous heat release on the flue gas side. According to the n...

Claims

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Application Information

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IPC IPC(8): F23L15/02F23J15/08
CPCF23J15/08F23L15/02Y02E20/34
Inventor 韦红旗石伟伟申先念王丽丽
Owner 南京博沃科技发展有限公司
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