CN212869736U

CN212869736U - Protection structure for vertical economizer

Info

Publication number: CN212869736U
Application number: CN202021552209.6U
Authority: CN
Inventors: 单永健; 冯小东
Original assignee: Harbin Hongqi Boiler Co ltd
Current assignee: Harbin Hongqi Boiler Co ltd
Priority date: 2020-07-30
Filing date: 2020-07-30
Publication date: 2021-04-02
Anticipated expiration: 2030-07-30

Abstract

The utility model provides a protection architecture for on vertical economizer, belongs to heat exchanger technical field to solve vertical screw thread tobacco pipe import department flue gas temperature is higher, and is very fast, causes the problem that mouth of pipe wearing and tearing and the pipe sheet that links to each other with the tobacco pipe ftracture easily. The utility model discloses an abrasionproof pipe, heat insulation layer and inflation layer, the flue gas entrance of the tube sheet on the economizer is equipped with a plurality of abrasionproof pipes, and the heat exchange tube butt joint on every abrasionproof pipe and the economizer all is equipped with the inflation layer on tube sheet terminal surface and abrasionproof pipe, is equipped with the heat insulation layer on the inflation layer. The utility model discloses an add the abrasionproof pipe and change former flue gas vortex and take place the position, make the vortex produce at the abrasionproof section, can effectively avoid threaded smoke pipe wall wearing and tearing, after the abrasionproof pipe wearing and tearing are serious, can change. After improvement, only partial replacement is needed. Meanwhile, the expansion layer and the heat insulation layer are arranged by utilizing the high thermal resistance of the material, so that the problem that the tube plate is cracked when being heated is avoided.

Description

Protection structure for vertical economizer

Technical Field

The utility model relates to a protection architecture for on vertical economizer belongs to heat exchanger technical field.

Background

The economizer is a device which is arranged at the lower part of a flue at the tail part of a boiler and used for recovering the waste heat of exhausted smoke, heats the feed water of the boiler into a heating surface with certain water temperature, reduces the exhaust temperature of the smoke because the economizer absorbs the heat of high-temperature smoke, saves energy and improves the efficiency.

The main convection heating surface of the vertical coal economizer is a vertical threaded smoke pipe, and the smoke temperature at the inlet of the vertical threaded smoke pipe is high, so that the speed is high, the pipe orifice is easily abraded, and a pipe plate connected with the smoke pipe is easily cracked. The easily worn part of the threaded smoke tube is positioned at the variable section (the diameter position of 0.8 times of the tube) of the smoke inlet, and the part of the tube plate connected with the smoke tube, which is suitable for cracking in an over-temperature mode, is positioned at the tube hole position close to the smoke inlet.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve vertical screw thread tobacco pipe import department flue gas temperature higher, speed is very fast, causes the problem of mouth of pipe wearing and tearing and the tube sheet fracture that links to each other with the tobacco pipe easily, and provides a protection architecture for on the vertical economizer.

The utility model discloses a solve the technical scheme that above-mentioned technical problem took and be:

the utility model provides a protection architecture for on vertical economizer, includes abrasionproof pipe, heat insulation layer and inflation layer, and the flue gas entrance of tube sheet on the economizer is equipped with a plurality of abrasionproof pipes, and every abrasionproof pipe docks with the heat exchange tube on the economizer, all is equipped with the inflation layer on tube sheet terminal surface and abrasionproof pipe, is equipped with the heat insulation layer on the inflation layer.

Preferably, an anticorrosive layer made of epoxy zinc-rich primer is further arranged between the end face of the tube plate and the expansion layer.

Preferably, a refractory layer is provided on the expansion layer.

Preferably, the material of the fire-resistant layer is a fire-resistant casting material.

Preferably, a protective layer is provided on the refractory layer.

Preferably, the protective layer is made of thermal shock resistant and wear resistant materials.

Preferably, the heat insulation layer is made of heat resistance casting materials.

Preferably, the material of the expansion layer is epoxy coal tar pitch paint.

Preferably, a water outlet is arranged on the tube plate on the economizer.

Preferably, the inner diameter of each wear tube is equal to the inner diameter of the heat exchange tube on the economizer.

Compared with the prior art, the utility model following beneficial effect has:

one, the utility model discloses an add the abrasionproof pipe and change former flue gas vortex and take place the position, make the vortex produce at the abrasionproof section, can effectively avoid screw thread tobacco pipe wall wearing and tearing, after the abrasionproof pipe wearing and tearing are serious, can change, and the heat exchange tube can only wholly change if wearing and tearing appear before improving, increases the maintenance cost. After improvement, only partial replacement is needed. Meanwhile, the expansion layer and the heat insulation layer are arranged by utilizing the high thermal resistance of the material, so that the heat of the flue gas is separated from the tube plate, and the problem that the tube plate is cracked when being heated is avoided.

Second, the utility model discloses abrasionproof pipe, inflation layer and heat insulation layer that set up have wear-resisting easy change, adiabatic characteristics.

Drawings

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

FIG. 2 is an enlarged view of a portion of FIG. 1 at I;

fig. 3 is a plan view of the present invention.

The reference numerals in the figures illustrate: a is an anti-abrasion pipe, b is an anticorrosive layer, c is an expansion layer, d is a fire-resistant layer, e is a heat-insulating layer, f is a protective layer, and g is a pipe plate.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings: this embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation is given, but the scope of the present invention is not limited to the following embodiments.

Example 1: as shown in fig. 1 to 3, the protection structure for a vertical economizer of this embodiment includes an anti-wear tube a, a heat insulating layer e, and an expansion layer c, where a plurality of anti-wear tubes a are disposed at a flue gas inlet of a tube plate g on the economizer, each anti-wear tube a is butted with a heat exchange tube on the economizer, the expansion layer c is disposed on both an end surface of the tube plate g and the anti-wear tubes a, and the heat insulating layer e is disposed on the expansion layer c.

And an anti-corrosion layer b made of epoxy zinc-rich primer is arranged between the end face of the tube plate g and the expansion layer c to prevent the metal tube plate and the tubes from being corroded.

And a fire-resistant layer d is arranged on the expansion layer c to protect the heat-insulating layer e from high-temperature combustion of high-temperature flue gas.

Optionally, the material of the fire-resistant layer d is a fire-resistant casting material.

And a protective layer f is arranged on the refractory layer d, so that the refractory layer d has the functions of temperature resistance and wear resistance.

Optionally, the material of the protective layer f is a thermal shock resistant and wear resistant material.

Optionally, in this embodiment, the material of the heat insulating layer e is a heat-resistant casting material.

Optionally, in this embodiment, the material of the expansion layer c is epoxy coal tar paint.

The water outlet is formed in the tube plate g on the economizer, so that the tube plate g is flushed by lifting water, the part, which is prone to crack, of the tube plate g is sufficiently and effectively protected by water cooling, and the tube plate g can be further prevented from cracking.

The inner diameter of each wear-resistant pipe a is equal to that of the heat exchange pipe on the economizer, so that the smoke resistance can be reduced, and the wear of the wear-resistant pipes a or the heat exchange pipes is reduced.

The heat insulating layer made of five materials in the embodiment has two performances of high strength, abrasion resistance and high heat resistance. The original smoke vortex generation part is changed through a special structure, so that the vortex is generated at the wear-resistant section, and the pipe wall of the heat exchange pipe can be effectively prevented from being worn. The high heat resistance performance of the material is utilized to separate the smoke heat from the tube plate, and meanwhile, the water cooling protection is enhanced for the tube plate, so that the service life and the operation safety and reliability of the threaded smoke tube are effectively improved. The maintenance workload of the user is reduced, and the use cost of the user is saved.

The utility model discloses a space between a plurality of abrasionproof pipes a is filled to heat insulation layer e, inflation layer c, anticorrosive coating b, flame retardant coating d, protective layer f in, form approximate honeycomb structure.

The protective layer f, the fire-resistant layer d and the heat insulating layer e are sequentially arranged along the flue gas direction, and the peripheries of the protective layer f, the fire-resistant layer d and the heat insulating layer e are respectively coated by the expansion layer c.

The above description is only the preferred embodiments of the present invention, and these embodiments are all based on the present invention, and the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A protection architecture for on vertical economizer which characterized in that: the anti-abrasion device comprises anti-abrasion pipes (a), a heat insulation layer (e) and an expansion layer (c), wherein a plurality of anti-abrasion pipes (a) are arranged at a flue gas inlet of a pipe plate (g) on the economizer, each anti-abrasion pipe (a) is in butt joint with a heat exchange pipe on the economizer, the expansion layer (c) is arranged on the end surface of the pipe plate (g) and the anti-abrasion pipes (a), and the heat insulation layer (e) is arranged on the expansion layer (c).

2. The protection structure for the vertical economizer according to claim 1, wherein: an anti-corrosion layer (b) made of epoxy zinc-rich primer is arranged between the end face of the tube plate (g) and the expansion layer (c).

3. The protection structure for the vertical economizer according to claim 1, wherein: a fire-resistant layer (d) is arranged on the expansion layer (c).

4. A protection structure for a vertical economizer according to claim 3, wherein: the fireproof layer (d) is made of fireproof pouring materials.

5. The protection structure for the vertical economizer according to claim 3 or 4, wherein: the refractory layer (d) is provided with a protective layer (f).

6. The protection structure for the vertical economizer according to claim 5, wherein: the protective layer (f) is made of thermal shock resistant and wear resistant materials.

7. The protection structure for the vertical economizer according to claim 1, wherein: the heat insulation layer (e) is made of heat resistance pouring materials.

8. The protection structure for the vertical economizer according to claim 1, wherein: the material of the expansion layer (c) is epoxy coal asphalt paint.

9. The protection structure for the vertical economizer according to claim 1, wherein: a water outlet is arranged on the tube plate (g) on the economizer.

10. The protection structure for the vertical economizer according to claim 1, wherein: the inner diameter of each wear-resistant pipe (a) is equal to that of the heat exchange pipe on the economizer.