CN211650194U

CN211650194U - Anti-abrasion structure for elbow of coal economizer

Info

Publication number: CN211650194U
Application number: CN201922415175.XU
Authority: CN
Inventors: 费茂华; 朱新友
Original assignee: Shanghai Industrial Boiler Wuxi Co ltd
Current assignee: Shanghai Industrial Boiler Wuxi Co ltd
Priority date: 2019-12-27
Filing date: 2019-12-27
Publication date: 2020-10-09
Anticipated expiration: 2029-12-27

Abstract

The utility model relates to an anti-wear structure for the elbow of an economizer, which comprises a retaining wall body, wherein anti-wear grooves for accommodating the elbows at the two sides of each group of economizer pipes are respectively formed on the two side surfaces of the retaining wall body; the anti-abrasion grooves are provided with a plurality of groups at intervals along the flowing direction of the flue gas. The anti-abrasion groove is of a U-shaped structure. And two sides of each group of economizer tubes are respectively fixedly connected with a hanging bracket arranged at the top of the notch of the anti-abrasion groove through a pipe clamp. Each group of economizer pipes are evenly arranged in multiple rows at intervals along the vertical direction, and the multiple rows of economizer pipes are wrapped and connected into a whole along the circumferential direction by the multiple pipe clamps. The hanger is fixedly mounted with steel plates along the edge of the notch at the upper end of the anti-abrasion groove, and the top of each row of pipe clamps is welded with the steel plates through vertical sections. The top of each row of pipe clamps is fixedly connected with the edge of a notch at the lower end of the anti-abrasion groove through the vertical section. The utility model discloses simple structure, simple to operate, protection elbow exempt from to receive wearing and tearing, and the abrasionproof is effectual, need not to adopt to install the abrasionproof cover additional to the elbow, perhaps regularly change the method of economizer pipe, practice thrift installation and maintenance cost greatly.

Description

Anti-abrasion structure for elbow of coal economizer

Technical Field

The utility model belongs to the technical field of the economizer technique and specifically relates to an economizer elbow wear-resisting structure.

Background

Coal is mainly combusted in a thermal power plant in China, fly ash is formed by combining ash in the coal and incomplete combustion products, corrosive components in flue gas and the fly ash carried by the flue gas can corrode and wear a boiler heating surface. As an important convection heating surface of a power station boiler, the low-temperature economizer can fully utilize the waste heat of the flue gas, effectively reduce the temperature of the flue gas and improve the running economy of the boiler. In the operation of an actual power station boiler, a low-temperature economizer is easily worn and corroded by high-speed fly ash in flue gas, pipe explosion can occur in the severe case, the stable operation of the boiler is seriously influenced, and uncertain factors exist in the economical efficiency and the safety of the operation of a power station.

The traditional anti-abrasion measures of the light pipe type coal economizer are that the first two rows, the front two rows and the rear two rows, the smoke facing surfaces of the wall penetrating pipes are provided with anti-abrasion covers, and the elbow parts are provided with inner-bending and outer-bending anti-abrasion covers, so that the light pipe type coal economizer has better effects on fire coal with good screening characteristics and small fine particle proportion. However, if the tail smoke concentration is high, the structure enables the coal economizer to explode due to abrasion after being used for about 3000 hours, and great potential safety hazard is caused to the normal operation of the boiler.

SUMMERY OF THE UTILITY MODEL

The applicant aims at the defects in the prior art and provides an anti-abrasion structure for the elbow of the economizer, which is reasonable in structure, so that the abrasion of the elbow is effectively prevented, and the installation and maintenance cost is reduced.

The utility model discloses the technical scheme who adopts as follows:

an anti-abrasion structure for elbows of an economizer comprises a retaining wall body, wherein anti-abrasion grooves for accommodating elbows on two sides of each group of economizer pipes are formed on two side surfaces of the retaining wall body respectively; the anti-abrasion grooves are provided with a plurality of groups at intervals along the flowing direction of the flue gas.

As a further improvement of the above technical solution:

the anti-abrasion groove is of a U-shaped structure.

And two sides of each group of economizer tubes are respectively fixedly connected with a hanging bracket arranged at the upper end of the notch of the anti-abrasion groove through a pipe clamp.

Each group of economizer pipes are evenly arranged in multiple rows at intervals along the vertical direction, and the multiple rows of economizer pipes are wrapped and connected into a whole along the circumferential direction by the multiple pipe clamps.

The hanger is fixedly mounted with steel plates along the edge of the notch at the upper end of the anti-abrasion groove, and the top of each row of pipe clamps is welded with the steel plates through vertically extending straight sections.

The bottom of each row of pipe clamps is also fixedly connected with the lower end edge of the anti-abrasion groove through a vertically extending straight section.

The utility model has the advantages as follows:

the utility model discloses simple structure, simple to operate, protection elbow exempt from to receive wearing and tearing, and the abrasionproof is effectual, need not to adopt to install the abrasionproof cover additional to the elbow, perhaps regularly change the method of economizer pipe, practice thrift installation and maintenance cost greatly.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic view of an installation structure of a group of economizer tubes in fig. 1.

Fig. 3 is a schematic view of the installation structure of the economizer tube and the hanger of the present invention.

Fig. 4 is an enlarged view of a portion a in fig. 3.

Wherein: 1. an economizer tube; 2. a pipe clamp; 3. a retaining wall body; 4. a steel plate; 11. bending the pipe; 31. and an anti-abrasion groove.

Detailed Description

The following describes embodiments of the present invention with reference to the drawings.

As shown in fig. 1 to 4, the anti-wear structure for the economizer elbow of the present embodiment includes a retaining wall body 3, wherein anti-wear grooves 31 for accommodating two side elbows 11 of each group of economizer pipes 1 are respectively formed on two side surfaces of the retaining wall body 3; the anti-wear grooves 31 are provided with a plurality of groups at intervals along the flowing direction of the flue gas.

The wear-proof groove 31 is of a U-shaped structure.

Two sides of each group of economizer tubes 1 are respectively fixedly connected with a hanging bracket arranged at the upper end of the notch of the anti-abrasion groove 31 through pipe clamps 2.

Each group of economizer tubes 1 are uniformly arranged in a plurality of rows at intervals along the vertical direction, and a plurality of tube clamps 2 wrap and connect the plurality of rows of economizer tubes 1 into a whole along the circumferential direction.

The hanger is fixedly mounted with a steel plate 4 along the edge of the upper end notch of the anti-abrasion groove 31, and the top of each row of pipe clamps 2 is welded with the steel plate 4 through a vertically extending straight section.

The bottom of each row of pipe clamps 2 is fixedly connected with the lower end edge of the wear-resisting groove 31 through a vertically extending straight section.

The utility model discloses in the implementation process, fix the both sides of economizer pipe 1 at abrasionproof recess 31 notch edge respectively through pipe clamp 2, get up elbow 11 protection through abrasionproof recess 31, avoid the direct erodeing of flue gas, the inside boiler operation initial stage of abrasionproof recess 31 has a small amount of flue gas infiltration, nevertheless because abrasionproof recess 31 mouth has a large amount of economizer pipe clamps 2 to block, the infiltration abrasionproof recess 31's flue gas volume is few, and flue gas direction changes the back flue gas speed slowly, can not be influential to elbow 11 wearing and tearing.

After the boiler operates for a period of time, fine ash in the flue gas is deposited in the anti-abrasion groove 31, so that the anti-abrasion groove is filled with the fine ash, the elbow 11 is wrapped, and the infiltration of the flue gas is further prevented.

The above description is for the purpose of explanation and not limitation of the invention, which is defined in the claims, and any modifications may be made within the scope of the invention.

Claims

1. The utility model provides an economizer elbow wear-resisting structure which characterized in that: the anti-abrasion device comprises a retaining wall body (3), wherein anti-abrasion grooves (31) for accommodating elbows (11) on two sides of each group of economizer tubes (1) are respectively formed on two side surfaces of the retaining wall body (3); the anti-abrasion grooves (31) are provided with a plurality of groups at intervals along the flowing direction of the flue gas.

2. The economizer elbow wear prevention structure of claim 1, wherein: the anti-abrasion groove (31) is of a U-shaped structure.

3. The economizer elbow wear prevention structure of claim 1, wherein: two sides of each group of economizer pipes (1) are respectively fixedly connected with a hanging bracket arranged at the upper end of the notch of the anti-abrasion groove (31) through pipe clamps (2).

4. The economizer elbow wear structure of claim 3, wherein: each group of economizer pipes (1) are uniformly arranged in a plurality of rows at intervals along the vertical direction, and a plurality of pipe clamps (2) wrap the plurality of rows of economizer pipes (1) along the circumferential direction and are connected into a whole.

5. The economizer elbow wear structure of claim 3, wherein: the hanger is fixedly installed with a steel plate (4) along the edge of an upper-end notch of the anti-abrasion groove (31), and the top of each row of pipe clamps (2) is welded with the steel plate (4) through a vertically extending straight section.

6. The economizer elbow wear structure of claim 5, wherein: the bottom of each row of pipe clamps (2) is also fixedly connected with the lower end edge of the wear-resistant groove (31) through a vertically extending straight section.