An anti-shaking device for preventing the wall of a flame boiler from shaking

Abstract

The invention relates to a shaking stopping device for preventing a flame boiler wall from shaking. The shaking stopping device for preventing the flame boiler wall from shaking is connected between a horizontal rigid beam which is arranged on the boiler wall and a vertical column of a supporting steel framework of a boiler and comprises a T-shaped groove structure and slidable I-beam; a lateral flange surface of the horizontal rigidity beam, which is opposite to the vertical column, is fixedly connected with the T-shaped groove structure; one end flange of the I-beam is in clearance fit with the T-shaped groove structure, so that the slidable I-beam can vertically slide along the vertical direction inside the T-shaped groove structure and the horizontal rigid beam is ejected or pulled through the slidable I-beam when the boiler wall shakes; the other end flange is fixedly connected with the vertical column by welding a horizontal supporting beam. According to the shaking stopping device for preventing the flame boiler wall from shaking, the integral suspension characteristic of the boiler wall is considered, the horizontal rigidity of the boiler wall is increased and meanwhile self-intensity and self-stability of the shaking stopping device is guaranteed under the premise that normal expansion of the boiler wall is not influenced, the problem of boiler wall shaking in a large margin is effectively solved, and operation safety of a boiler unit is improved.

Description

technical field [0001] The invention relates to an anti-sway technology for a boiler wall, in particular to an anti-sway device for preventing the wall of a flame boiler from shaking. Background technique [0002] In large-scale thermal power plants, coal-fired flame boilers are the core equipment for power generation. It is a very common phenomenon that the furnace wall shakes at a low frequency due to factors such as combustion negative pressure fluctuations, unstable fan air supply, or design defects in dynamic characteristics. In many cases, a certain amount of shaking of the furnace wall is inevitable. The key It is necessary to control the shaking amplitude within the allowable range. [0003] Generally, the furnace wall of a boiler is composed of a membrane water wall, an insulation layer and a sealing layer. The outer sides of the furnace wall are separated by a certain height, and are reinforced with horizontal rigid I-beams. The entire furnace wall is suspended fr...

AI Technical Summary

Problems solved by technology

Both the first two anti-sway devices can be equipped with multi-point anti-sway points on the horizontal rigid beam, that is, multiple anti-sway devices can be installed on the horizontal rigid beam, but the common disadvantage is that they do not consider the temperature of the boiler wall in the cold state and the hot state. The difference in downward expansion deformation; the third type of anti-sway point is only at the two ends of the horizontal rigid beam

Since the furnace wall adopts a fully suspended structure, the furnace wall and the horizontal rigid I-beam expand downward after combustion and heating. At the same time, the furnace wall is under the action of periodic vibration loads. The large deformation or alternating stress of the beam leads to the fatigue failure of the furnace wall; therefore, in the actual use process, the first two anti-sway devices all have the horizontal rigid beam being bent by the top or the welded support beam is connected to the horizontal rigid beam. The situation where the weld is pulled off leads to the failure of anti-sway; the third type of anti-sway point is only on both sides of the furnace wall, and the shaking in the middle of the furnace wall is difficult to suppress

Practice has thus proved that the existing anti-sway devices are not very effective

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