CN214948974U

CN214948974U - High-temperature superheater

Info

Publication number: CN214948974U
Application number: CN202120616768.7U
Authority: CN
Inventors: 洪代清
Original assignee: Xuancheng Dongsheng Machinery Co ltd
Current assignee: Xuancheng Dongsheng Machinery Co ltd
Priority date: 2021-03-26
Filing date: 2021-03-26
Publication date: 2021-11-30
Anticipated expiration: 2031-03-26

Abstract

The utility model discloses a high-temperature superheater, which comprises an inlet header, an outlet header and a superheating pipe system welded on the inlet header and the outlet header, wherein the superheating pipe system comprises a plurality of superheating pipe bundles arranged at intervals in the axial direction of a boiler flue, the superheating pipe bundles comprise a plurality of coiled pipes arranged in parallel in the radial direction of the boiler flue, and the pipe orifice parts of the plurality of coiled pipes are welded and combined to the pipe orifice part of one of the coiled pipes so that the superheating pipe bundle only has one steam inlet and one steam outlet; the guard plate is installed through the clamp on the bent pipe portion of coiled pipe, has the clearance between guard plate and the coiled pipe, and the clamp sharing bolted connection on the many coiled pipes is fixed. The utility model discloses set up curved guard plate at the bent pipe portion and the weld part of coiled pipe and protect the body, reduced the flue gas and to the scouring and tearing and the erosive wear of body, avoided the emergence of the pipe burst phenomenon, the security is high, and the while is overheated piping and flue gas heat transfer area big, and heat exchange efficiency is high.

Description

High-temperature superheater

Technical Field

The utility model relates to a high temperature over heater belongs to the boiler field.

Background

In the boiler, the over heater is generally installed in the boiler flue for become superheated steam with saturated steam heating, and the over heater generally divide into low temperature over heater and high temperature over heater according to its position and effect, and low temperature over heater is located the horizontal flue, and high temperature over heater then is more close to furnace exit. The majority of boilers equipped with high-temperature superheaters are large boilers, in particular high-pressure boilers. The high-pressure boiler has high requirement on the safety coefficient of a pipe system, the high-temperature superheater is close to the outlet of the hearth, the flue gas impact is large, the erosion wear and the corrosion wear are more obvious, and pipe explosion and even accidents are easily caused. According to the previous research and analysis of the applicant, the superheater pipe burst is easy to occur at the bent pipe and the welding position of the superheater pipe, and the reasons are mainly caused by bent pipe stress and welding stress concentration.

SUMMERY OF THE UTILITY MODEL

To the above, the utility model provides a high temperature over heater, the utility model discloses a technical scheme as follows:

a high-temperature superheater comprises an inlet header, an outlet header and a superheating pipe system welded on the inlet header and the outlet header, wherein the superheating pipe system comprises a plurality of superheating pipe bundles arranged at intervals in the axial direction of a boiler flue, the superheating pipe bundles comprise a plurality of coiled pipes arranged in parallel in the radial direction of the boiler flue, pipe orifice parts of the plurality of coiled pipes are welded and combined to the pipe orifice part of one of the coiled pipes, so that the superheating pipe bundle only has one steam inlet and one steam outlet, and the steam inlet and the steam outlet are respectively welded and fixed with pipe connecting seats of the inlet header and the outlet header; the guard plate is installed through the clamp on the bent pipe portion of coiled pipe, has the clearance between guard plate and the coiled pipe, and the clamp sharing bolted connection on the many coiled pipes is fixed.

Furthermore, the section of the protection plate is in an arc shape with a central angle of 120-180 degrees.

Further, when the single serpentine pipe is provided with a welding part, a protection plate is arranged on the welding part through a hoop.

Compared with the prior art, the beneficial effects of the utility model reside in that: at first the utility model discloses set up curved guard plate at the bent pipe portion and the weld part of coiled pipe and protect the body, reduced the flue gas and to the erosive wear and the erosive wear of body, avoided the emergence of the pipe burst phenomenon, the security is high. Secondly, the arrangement of the overheating pipe systems axially spaced and radially parallel to the flue is adopted, the heat exchange area between the overheating pipe systems and the flue gas is large, and the heat exchange efficiency is high. And the clamps on the plurality of coiled pipes are connected and fixed by one bolt, so that the locking fixation of the clamps and the stable fixation of the coiled pipes are realized.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a sectional view a-a of fig. 1.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

Example (b):

referring to fig. 1-2, a high temperature superheater comprises an inlet header 1, an outlet header 2 and a superheater pipe system welded on the inlet header 1 and the outlet header 2, wherein the superheater pipe system comprises a plurality of superheater pipe bundles 3 arranged at intervals in the axial direction of a boiler flue, the superheater pipe bundles 3 comprise a plurality of serpentine pipes 4 arranged in parallel in the radial direction of the boiler flue, pipe openings of the serpentine pipes 4 are welded and combined to the pipe opening of one serpentine pipe 4, so that the superheater pipe bundle 3 only has one steam inlet and one steam outlet, and the steam inlet and the steam outlet are respectively welded and fixed with pipe connecting seats of the inlet header 1 and the outlet header 2; the guard plate 6 is installed through clamp 5 on the flue gas impact surface on the bent pipe portion of coiled pipe 4, has the clearance between guard plate 6 and the coiled pipe 4, and clamp 5 on the many coiled pipes 4 shares a bolt 7 to be connected fixedly.

Further, the cross section of the protection plate 6 is arc-shaped with a central angle of 180 degrees.

At first the utility model discloses set up curved guard plate at the bent pipe portion and the weld part of coiled pipe and protect the body, what the flue gas direct impact is the guard plate, has reduced the flue gas and has washed away wearing and tearing and corrosive wear to the body, has avoided the emergence of the pipe burst phenomenon, and the security is high. Secondly, the arrangement of the overheating pipe systems axially spaced and radially parallel to the flue is adopted, the heat exchange area between the overheating pipe systems and the flue gas is large, and the heat exchange efficiency is high. And the clamps on the plurality of coiled pipes are connected and fixed by one bolt, so that the locking fixation of the clamps and the stable fixation of the coiled pipes are realized.

The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations are also considered as the protection scope of the present invention.

Claims

1. A high temperature superheater characterized by: the boiler comprises an inlet header, an outlet header and a superheating pipe system welded on the inlet header and the outlet header, wherein the superheating pipe system comprises a plurality of superheating pipe bundles arranged at intervals in the axial direction of a boiler flue, the superheating pipe bundles comprise a plurality of coiled pipes arranged in parallel in the radial direction of the boiler flue, pipe mouth parts of the plurality of coiled pipes are welded and combined to the pipe mouth part of one of the coiled pipes, so that the superheating pipe bundles only have one steam inlet and one steam outlet, and the steam inlet and the steam outlet are respectively welded and fixed with pipe connecting seats of the inlet header and the outlet header; the guard plate is installed through the clamp on the bent pipe portion of coiled pipe, has the clearance between guard plate and the coiled pipe, and the clamp sharing bolted connection on the many coiled pipes is fixed.

2. A high temperature superheater according to claim 1, characterized in that: the cross section of the protection plate is in an arc shape with the central angle of 120-180 degrees.

3. A high temperature superheater according to claim 1, characterized in that: when the single serpentine pipe is provided with the welding part, the protection plate is arranged on the welding part through the hoop.