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Device for preventing circulating fluidized bedboiler tail side wall enclosure superheater tube from being torn

A technology for circulating fluidized bed and superheater tubes, which is applied in the field of devices for preventing the tearing of superheater tubes on the side walls of circulating fluidized bed boilers, and can solve problems affecting the safe and economical operation of power plants, different expansions, and cracks in tubes, etc. Achieve the effect of reducing maintenance costs and labor costs, solving expansion restrictions, and free expansion

Pending Publication Date: 2018-02-09
HARBIN HAGUO BOILER ENG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention solves the temperature difference between the side wall and the upper header of the circulating fluidized bed boiler in the prior art, the difference in expansion, the stress at the junction of the pipe and the flat steel, cracks in the pipe, and leakage, which cause the power plant to shut down and affect the To solve the problem of safe and economical operation of the power plant, and then provide a device for preventing the tearing of the superheater tube on the tail side of the circulating fluidized bed boiler

Method used

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  • Device for preventing circulating fluidized bedboiler tail side wall enclosure superheater tube from being torn
  • Device for preventing circulating fluidized bedboiler tail side wall enclosure superheater tube from being torn

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Experimental program
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specific Embodiment approach 1

[0014] Specific implementation mode one: combine Figure 1-Figure 2 Describe this embodiment, the device for preventing the superheater tube tearing of the side cladding wall of the circulating fluidized bed boiler described in this embodiment, it includes two sets of steel plate fixing flat steel 4, four sets of second comb plates 7, four Steel plate 5, multiple expansion joints 2, multiple sealing filler blocks 3, multiple sets of first comb plates 6 and multiple expansion joints fixing flat steel 1, two steel plates 5 are fixed and installed on a set of steel plate fixing flat steel 4 in parallel , the other two steel plates 5 are parallel and fixedly installed on another group of fixed steel plates 4, and the distance between the two steel plates 5 on one set of fixed steel plates 4 is greater than that of the two parallel steel plates on the other set of fixed steel plates 4 5, each expansion joint 2 is provided with two expansion joints to fix the flat steel 1, and the t...

specific Embodiment approach 2

[0015] Specific implementation mode two: combination Figure 1-Figure 2 Describe this embodiment, a device for preventing the superheater tube tearing of the side cladding wall of the circulating fluidized bed boiler described in this embodiment, each set of steel plate fixed flat steel 4 includes two steel plate fixed flat steel 4, and two steel plate fixed flat steel 4 Steel 4 is relatively vertically fixedly installed on the outer wall of each side superheater tube on a row of superheater tubes, and it is the same as the specific embodiment one.

specific Embodiment approach 3

[0016] Specific implementation mode three: combination Figure 1-Figure 2 Describe this embodiment, the device for preventing the superheater tube tearing of the side cladding wall of the circulating fluidized bed boiler described in this embodiment, each set of first comb-shaped plates 6 includes two first comb-shaped plates 6, and the first comb-shaped plates 6 The pattern plate 6 is a rectangular plate, and one side of each first comb-shaped plate 6 is processed with an arc-shaped hole, and two first comb-shaped plates 6 are relatively arranged on a superheater tube, and each first comb-shaped plate 6 The side wall of the arc-shaped hole is fixedly installed on the outer wall of the superheater tube, and the two first comb plates 6 of each set of first comb plates 6 are located on both sides of the two expansion joints on the superheater tube to fix the flat steel 1 . Others are the same as in the first embodiment.

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Abstract

The invention discloses a device for preventing a circulating fluidized bedboiler tail side wall enclosure superheater tube from being torn, and relates to a device for preventing a fluidized bedboiler superheater tube from being torn. To solve the problems that in the prior art, a circulating fluidized bedboiler side wall enclosure and an upper header have a temperature difference and are different in swell capacity, stress exists in the binding position of the tube and flat steel, the tube has cracks, leakage occurs, consequentially, a power plant furnace is shut down, and safe and economicoperation of the power plant is affected, the device provided by the invention comprises two sets of steel plate fixing flat steel, four sets of second combtype plates, four steel plates, a pluralityof expansion joints, a plurality of sealing fill blocks, a plurality of sets of first combtype plates and a plurality of expansion joint fixing flat steel; and two of the steel plates are parallelly fixed and mounted on one of the two sets of steel plate fixing flat steel, the other two of the steel plates are parallelly fixed and mounted on the other set of steel plate fixing flat steel, and thedistance between the two steel plates on one set of steel plate fixing flat steel is greater than the distance between the two parallel steel plates on the other set of steel plate fixing flat steel.The device is used for the field of circulating fluidized bedboilers.

Description

technical field [0001] The invention relates to a device for preventing the tearing of a superheater tube of a fluidized bed boiler, in particular to a device for preventing the tearing of the superheater tube of the tail side wall of a circulating fluidized bed boiler. Background technique [0002] The wall-enclosed superheater at the end of the circulating fluidized bed boiler uses the heat of the high-temperature flue gas to heat the drum to generate saturated steam, which reduces the temperature of the flue gas at the inlet of the high-temperature superheater and increases the temperature of the steam at the inlet of the low-temperature superheater. When the boiler is in operation, because the steam flows inside the side wall and receives high-temperature flue gas radiation at the same time, the wall temperature is high, while the header on the side wall is outside the flue gas, and only steam of the same temperature flows inside, so there is a temperature difference betw...

Claims

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Application Information

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IPC IPC(8): F23C10/18
CPCF23C10/18F23C2206/10
Inventor 翟闯王健张本夫黄铭久
Owner HARBIN HAGUO BOILER ENG TECH