Near-wall air device for preventing high-temperature corrosion of water-cooled wall of power station boiler

A technology for high-temperature corrosion and power plant boilers, applied in combustion methods, combustion chambers, outer covers/linings, etc., can solve problems such as high heat load, burnout of nozzles, large total air volume of wall-attached wind, etc., and achieve small resistance and attenuation of wind speed slow effect

Inactive Publication Date: 2010-05-12
XI AN JIAOTONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1. Each burner in the burner area must be equipped with a wall-mounted air device, which requires a large investment and a complex system that is prone to problems
[0006] 2. The wind direction of the wall-attached wind is parallel to the plane of the water-cooled wall, but perpendicular to the axis of the water-cooled wall, and the wind speed attenuates relatively quickly. To solve the high-temperature corrosion of the water-cooled wall, a higher wind speed must be used, so the total air volume of the wall-attached air invested is re

Method used

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  • Near-wall air device for preventing high-temperature corrosion of water-cooled wall of power station boiler
  • Near-wall air device for preventing high-temperature corrosion of water-cooled wall of power station boiler
  • Near-wall air device for preventing high-temperature corrosion of water-cooled wall of power station boiler

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Embodiment Construction

[0030] The present invention is described in further detail below in conjunction with accompanying drawing:

[0031] see figure 1 , 2 , 3. A wall-mounted air device for preventing high-temperature corrosion of the water wall of a power plant boiler, including an air duct 4, a wall-mounted wind box 5, a wall-mounted air unit nozzle 8, an online flue gas component monitor 9, and a velocity measuring device 10 ; One end of the air duct 4 communicates with the secondary air main pipe 2 through the damper 3, and the other end is connected with the wall-mounted wind box 5; the wall-mounted wind unit spout 8 includes a baffle 8-1, a fin Sheet 8-2, slit 8-3 and vortex plate 8-4; one end of the fin 8-2 is welded to the water wall tube 6-2, the other end is welded to the baffle plate 8-1, and the vortex plate 8-4 is connected to the The baffle plate 8-1 is connected by welding, the baffle plate 8-1, the fins 8-2 and the vortex plate 8-4 are all corrugated plates, and the membrane wate...

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Abstract

The invention discloses a near-wall air device for preventing the high-temperature corrosion of the water-cooled wall of a power station boiler, which comprises an air duct, a regulating valve, a near-wall air box, near-wall air unit nozzles, a fuel component on-line monitor and a speed measuring device, wherein the direction of the near-wall air is parallel to the axis of a pipe of the water-cooled wall, the resistance along the course is small and the air speed reduction is slow; only one layer of near-wall air nozzles is required to be arranged in a burner area and the system structure is simple; and the nozzles are flexibly arranged, the nozzle cooling condition is good, the operational air volume is small and the stability is high. Thus, the device is suitable to be promoted for preventing the high-pressure corrosion of the water-cooled walls of power station boilers.

Description

technical field [0001] The invention belongs to the technical field of power station boilers, and relates to a wall-attached wind device for preventing high-temperature corrosion of a water wall of a power station boiler. Background technique [0002] In recent years, with the rapid development of modern society, the demand of the power industry has been increasing, and the capacity of various boilers and the heat load of the furnace volume have also been increasing. The high-temperature corrosion of the water wall in the burner area has become a common problem in coal-fired power plant boilers. It is also one of the main problems affecting the safe production of electric power. [0003] The high-temperature corrosion of the water wall in the burner area is a complex physical and chemical process, which is mainly related to the temperature near the water wall, the composition of flue gas, the characteristics of coal quality and the movement of coal particles. Due to uneven ...

Claims

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Application Information

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IPC IPC(8): F23M5/08
Inventor 赵钦新张知翔徐良洪王云刚金用强边宝
Owner XI AN JIAOTONG UNIV
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