CN211650191U

CN211650191U - Coil pipe hanging structure of coal economizer

Info

Publication number: CN211650191U
Application number: CN201921971774.3U
Authority: CN
Inventors: 夏胜; 程晓青; 桑朋; 黄磊
Original assignee: Wuxi Huaguang Environment and Energy Group Co Ltd
Current assignee: Wuxi Huaguang Environment and Energy Group Co Ltd
Priority date: 2019-11-15
Filing date: 2019-11-15
Publication date: 2020-10-09
Anticipated expiration: 2029-11-15

Abstract

The utility model relates to an economizer coiled pipe technical field specifically is an economizer coiled pipe hangs structure, and it can simple structure be reliable, and heat transfer efficiency is high, prevents the elbow wearing and tearing, and it includes furnace wall and coiled pipe, its characterized in that, the pipe clamp is connected at coiled pipe both ends, the steel sheet is suspended in midair in pipe clamp top fixed connection, suspend in midair the steel sheet through being fixed in the backplate erects the muscle is connected to the support floor of furnace wall, be provided with the recess on the furnace wall inner wall, the elbow at coiled pipe both ends is located in the recess and with leave the clearance between the recess.

Description

Coil pipe hanging structure of coal economizer

Technical Field

The utility model relates to an economizer coiled pipe technical field specifically is an economizer coiled pipe hangs structure.

Background

With the increasingly strict national requirements on pollutant emission and the gradually increasing demand of power station boilers and industrial boilers on clean energy technology, the circulating fluidized bed combustion technology has attracted more and more attention as an advanced clean and efficient combustion utilization technology of low-grade fuel, and has been rapidly developed in recent years.

The coil pipe coal economizer is an important component in a circulating fluidized bed boiler, belongs to a part of a water-cooling heating surface of the boiler, and mainly has the functions of heating boiler feed water into unsaturated feed water with a certain temperature, entering a steam drum, reducing the exhaust gas temperature, improving the boiler efficiency and saving the fuel consumption. The arrangement of the coiled pipe coal economizer is of great importance to the exhaust gas temperature of the high-temperature high-pressure circulating fluidized bed boiler, the boiler efficiency and the reduction of fuel consumption.

Because the serpentine economizer needs a fixing device in the running process and is in a higher flue gas temperature atmosphere, fine dust particles contained in flue gas can also abrade the elbow of the serpentine economizer. Therefore, the operation stability of the coal economizer coiled pipe is ensured, and the abrasion of the elbow of the coal economizer is very critical.

In order to fix the economizer serpentine, a support beam is usually designed to support or suspend. When the supporting structure beam is adopted, sometimes the serpentine pipe pieces are easily deformed due to the fact that the serpentine pipes are longitudinally arranged, so that flue gas bias flow and a flue gas corridor are formed, and local serpentine pipes are abraded; if a hanging frame beam is adopted, in order to prevent the influence of high flue gas temperature on metal performance, the outer side of the beam is usually coated with a castable so that the flue gas flow area is reduced, meanwhile, the beam is easy to accumulate dust, blocks the flue gas flow, reduces the heat absorption area of a coiled pipe, and is not beneficial to reducing the flue gas temperature. Meanwhile, no matter the supporting structure or the hanging structure beam, a ventilation pipeline needs to be arranged in the operation process, and the cost of the boiler is increased. In addition, the snakelike pipe elbow of the economizer is a weak link in operation, so pipe explosion and furnace shutdown accidents are easily caused by abrasion.

Disclosure of Invention

In order to solve the problem that current economizer heat transfer efficiency is low, and the structure is complicated, the easy wearing and tearing of elbow department, the utility model provides a structure is hung to economizer snakelike pipe, it can simple structure be reliable, and heat transfer efficiency is high, prevents the elbow wearing and tearing.

The technical scheme is as follows: the utility model provides a structure is hung to economizer coiled tube, its includes furnace wall and coiled tube, its characterized in that, the pipe clamp is connected at coiled tube both ends, the steel sheet is suspended in midair in pipe clamp top fixed connection, suspend in midair the steel sheet through being fixed in the backplate erects the muscle is connected to the support floor of furnace wall, be provided with the recess on the furnace wall inner wall, the elbow at coiled tube both ends is located in the recess and with leave the clearance between the recess.

It is further characterized in that an expansion gap is left between the adjacent suspension steel plates;

the furnace wall at the groove is built by special-shaped bricks.

Adopt the utility model discloses afterwards, saved original a supporting beam or hung in midair the roof beam, need not to design roof beam air pipe, the coiled pipe both ends are fixed by, and simple structure is reliable, has reduced the circulation of flue gas and has hindered, guarantees the abundant heat transfer between flue gas and the coiled pipe, has improved heat transfer efficiency to the economizer elbow is located the recess of brickwork, does not have the flue gas and erodees wearing and tearing, has prevented the elbow wearing and tearing.

Drawings

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

FIG. 2 is a top view of FIG. 1 (with the serpentine tubes and tube clamps omitted);

fig. 3 is a furnace wall structure.

Detailed Description

See fig. 1, fig. 2, fig. 3, an economizer serpentine pipe hangs structure, it includes furnace wall 1 and serpentine pipe 2, pipe clamp 3 is connected at the both ends of serpentine pipe 2, pipe clamp 3 top fixed connection suspends steel sheet 4 in midair, suspend steel sheet 4 and connect backplate riser 6 through the support floor 5 that is fixed in furnace wall 1 in midair, be provided with recess 7 on the furnace wall 1 inner wall, the elbow at the both ends of serpentine pipe 2 is located recess 7 and leaves the clearance with recess 7 between, can not receive recess 7 inner wall influence when serpentine pipe 2 expands. An expansion gap is reserved between the adjacent suspension steel plates 4; the furnace wall 1 at the groove 7 is built by special-shaped bricks.

The utility model has the advantages of it is following:

(1) the installation is simple and effective, saves material. Compared with the prior structure, the structure omits the arrangement of a supporting beam (or a suspension beam), omits the pouring work of the beam, omits the design and installation of a beam ventilation pipeline and saves materials.

(2) The fixing effect is good, and the safety and the reliability are high. Adopt the elbow department of coiled pipe both ends fixed, the stability of multiplicable coiled pipe, interval between the snakelike section of jurisdiction can obtain fine maintenance, in time in the operation of hot state, can not take place also because of the section of jurisdiction interval warp and cause the flue gas phenomenon of deflecting.

(3) Is favorable for heat transfer, and has high efficiency and energy conservation. By adopting the fixed suspension mode, the design of a ventilation beam is omitted, the obstruction of flue gas circulation is reduced, the sufficient heat exchange between the flue gas and the coiled pipe is ensured, the heat transfer coefficient of the economizer is increased, the utilization rate of flue gas waste heat is improved, the exhaust temperature is effectively reduced, the exhaust heat loss Q2 is reduced, and the furnace efficiency is improved.

(4) The elbow is prevented from being abraded, the continuous operation stability is improved, and the service life is prolonged. The elbow of this novel structure is hidden in the furnace wall, does not have the flue gas and erodes wearing and tearing, has saved design, the installation work of conventional elbow abrasionproof cover, when saving metal consumptive material, has improved the life of economizer coiled pipe, is favorable to the safety and stability operation of boiler.

Claims

1. The utility model provides a structure is hung to economizer coiled tube, its includes furnace wall and coiled tube, its characterized in that, the pipe clamp is connected at coiled tube both ends, the steel sheet is suspended in midair in pipe clamp top fixed connection, suspend in midair the steel sheet through being fixed in the backplate erects the muscle is connected to the support floor of furnace wall, be provided with the recess on the furnace wall inner wall, the elbow at coiled tube both ends is located in the recess and with leave the clearance between the recess.

2. The serpentine pipe hanging structure for the coal economizer as claimed in claim 1, wherein an expansion gap is left between adjacent hanging steel plates.

3. The coal economizer coiled pipe hanging structure is characterized in that the furnace wall at the groove is built by special-shaped bricks.