CN210718217U - Anti-corrosion high-temperature generator - Google Patents
Anti-corrosion high-temperature generator Download PDFInfo
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- CN210718217U CN210718217U CN201921788988.7U CN201921788988U CN210718217U CN 210718217 U CN210718217 U CN 210718217U CN 201921788988 U CN201921788988 U CN 201921788988U CN 210718217 U CN210718217 U CN 210718217U
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Abstract
An anti-corrosion high-temperature generator comprises an outer cylinder, an inner cylinder and a plurality of fire tubes arranged between the outer cylinder and the inner cylinder, wherein the front end and the rear end of each fire tube and the front end and the rear end of the inner cylinder are respectively welded with a front tube plate and a rear tube plate; and heat insulation coatings are arranged around the outer sides of the welding seams of the rear tube plate, the fire tubes and the inner cylinder. The utility model can prevent the welding flux at the welding seam from being affected by high temperature to generate tissue damage, which leads to insecure connection; on the other hand, the corrosion speed can be reduced, the corrosion of metal materials of the rear tube plate, the inner tube and the fire tube is prevented, and the service life is greatly prolonged.
Description
Technical Field
The utility model relates to a direct-fired lithium bromide absorption cold and warm water machine, in particular to an anti-corrosion high-temperature generator.
Background
The direct-fired lithium bromide absorption cold-warm water unit comprises a high-temperature generator, a low-temperature generator, a condenser, an evaporator and an absorber, and the working principle is as follows: the concentrated lithium bromide solution is heated and water vapor is generated by a high temperature generator by directly burning fuel to generate high temperature.
As shown in fig. 1: the high-temperature generator consists of an inner cylinder body 1, an outer cylinder body 2, a front tube plate 3, a rear tube plate 4, a plurality of fire tubes 5, a front smoke box and a rear smoke box 8, wherein the plurality of fire tubes 5 are arranged between the outer cylinder body 3 and the inner cylinder body 1, and the front end and the rear end of each of the fire tubes 5 and the inner cylinder body 1 are respectively connected with the front tube plate 3 and the rear tube plate 4 in a welding mode; the burner 9 is inserted into the inner cylinder 1 from the front tube plate 3, and sprays flame to boil the lithium bromide dilute solution around the inner cylinder 1 and the fire tube 5, thereby generating refrigerant vapor and concentrating the solution.
Because the flame side temperature of the high-temperature generator is close to 1000 ℃ at most at the position of the rear tube plate of the high-temperature generator, the metal material can be burnt; the heated area of the position is large, so that the flow of the lithium bromide solution is easily blocked, and the measured local temperature of the solution can exceed 200 ℃, thereby causing the corrosion of metal materials; and the position is often formed by welding a steel pipe and a pipe plate, belongs to a welding heat affected zone, and the corrosion resistance is reduced when a metal microstructure is damaged by welding.
Therefore, the position of the rear tube plate is the weakest link of the high-temperature generator, so that the rear tube plate is often easy to corrode and perforate first, and the service life of equipment is shortened.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the above-mentioned not enough of prior art and providing a low cost, it is effectual to insulate against heat, long service life's anticorrosion high temperature generator.
The technical scheme of the utility model is that: an anti-corrosion high-temperature generator comprises an outer cylinder, an inner cylinder and a plurality of fire tubes arranged between the outer cylinder and the inner cylinder, wherein the front end and the rear end of each fire tube and the front end and the rear end of the inner cylinder are respectively welded with a front tube plate and a rear tube plate; and heat insulation coatings are arranged around the outer sides of the welding seams of the rear tube plate, the fire tubes and the inner cylinder.
Further, the inner side of the rear end of the fire tube is also provided with a heat insulation coating.
Further, the fire tube is provided with a thermal insulation coating in a region extending to the inner cavity of the fire tube along the rear end part for not less than 20 mm.
Further, the inner side of the rear end of the inner cylinder body is also provided with a heat insulation coating.
Further, the inner cylinder body is provided with a heat insulation coating in an area which extends to the inner cavity of the cylinder body along the rear end part and has the length not less than 20 mm.
Further, the thickness of the heat insulation coating is 0.2-5 mm.
Furthermore, the welding seam between the rear tube plate and the fire tube extends outwards, and a heat insulation coating is arranged at the extending position of the welding seam.
Further, the length of the extension of the welding seam is not more than 10 mm.
Furthermore, the welding seam between the rear tube plate and the inner cylinder body extends outwards, and a heat insulation coating is arranged at the extending position of the welding seam.
Further, the length of the extension of the welding seam is not more than 20 mm.
The utility model has the advantages that: on one hand, the structure damage caused by the influence of high temperature on the welding flux at the welding seam can be prevented, so that the connection is not firm; on the other hand, the corrosion speed can be reduced, the corrosion of metal materials of the rear tube plate, the inner tube and the fire tube is prevented, and the service life is greatly prolonged.
Drawings
FIG. 1 is a schematic diagram of a prior art structure;
fig. 2 is a schematic structural diagram of an embodiment of the present invention.
Detailed Description
The invention will be described in further detail with reference to the drawings and specific examples.
As shown in fig. 2: an anti-corrosion high-temperature generator comprises an outer cylinder 2, an inner cylinder 1 and a plurality of fire tubes 5 arranged between the outer cylinder and the inner cylinder, wherein the front end and the rear end of the fire tubes 5 and the front end and the rear end of the inner cylinder 1 are respectively welded with a front tube plate 3 and a rear tube plate 4; and a heat insulation coating 7 is arranged around the outer side of the welding seam 6 of the rear tube plate 4, the fire tube 5 and the inner cylinder 1.
In general, the fire tube 5 and the inner cylinder 1 are welded on the front tube plate and the rear tube plate, the burner 9 is installed on the side of the front tube plate, the temperature of the side is low, the temperature of the side of the rear tube plate is extremely high, in the embodiment, the heat insulation coating 7 is arranged around the outer sides of the welding seam 6 of the rear tube plate 4, the fire tube 5 and the inner cylinder 1, so that the heat at the position can be obviously reduced, namely, the temperature of the flame side and the temperature of the solution side are reduced, and on one hand, the welding flux at the welding seam can be prevented from being influenced by; on the other hand, the corrosion speed can be reduced, the corrosion of metal materials of the rear tube plate, the inner tube and the fire tube is prevented, and the service life is greatly prolonged. In addition, the scheme of the embodiment realizes the heat insulation and corrosion prevention effects on the basis of not changing the original structure and materials of the high-temperature generator, and has low cost.
The outer periphery of the weld seam described in this embodiment may be the weld heat affected zone at and around the weld seam, such as the weld seam extension.
In addition, in order to further reduce the corrosion speed, the inner side of the rear end of the fire tube 5 is also provided with a heat insulation coating for insulating heat and reducing the smoke ablation in the fire tube; and the inner side of the rear end of the inner cylinder body 1 is also provided with a heat insulation coating for insulating heat and slowing down the high-temperature corrosion of the lithium bromide solution.
In this embodiment, the thickness of thermal barrier coating 7 is 0.2~5mm, if thickness is too little, the effect is not good, if thickness is too big, can waste raw and other materials, raises the cost. Preferably, the thickness of the thermal insulation coating is 1-3 mm.
The following is a preferred embodiment of the present invention:
coating a high-temperature-resistant heat-insulating coating 7 around the welding position (including the welding position and a welding heat affected area possibly suffered by the rear tube plate) of the rear tube plate 4 and the inner cylinder body 1 of the high-temperature generator and in the welding heat affected area possibly suffered by the inner cylinder body; if the position of the welding seam is coated with a first heat insulation coating 71, the extension of the welding seam is coated with a second heat insulation coating 72, and the inner side of the rear end of the inner cylinder body 1 is coated with a third heat insulation coating 73. Wherein the extension length of the welding seam is 10 mm; the inner side of the rear end of the inner cylinder body 1 is provided with a heat insulation coating in an area which extends to the inner cavity of the cylinder body along the rear end of the inner cylinder body and has a length not less than 20mm (preferably 8-15 mm).
A high-temperature-resistant heat-insulating coating 7 is coated around the welding position of the rear tube plate 4 and the fire tube 5 of the high-temperature generator (including the welding position and the welding heat affected zone possibly suffered by the rear tube plate) and the welding heat affected zone possibly suffered by the inner cylinder; if the weld is coated with a first thermal barrier coating 71, the weld is coated with a second thermal barrier coating 72 at the outer extent, and the rear end of the fire tube is coated with a third thermal barrier coating 73 on the inner side. Wherein the extension length of the welding seam is 5 mm; the inner side of the rear end of the fire tube is a region which extends along the rear end of the fire tube to the inner cavity of the fire tube by a length of not less than 20mm (preferably 5 to 10 mm).
The thermal insulation coating 7 of the embodiment is preferably a ZS-1 type high-temperature resistant thermal insulation material which can resist the high temperature of 1000 ℃.
Claims (10)
1. An anti-corrosion high-temperature generator comprises an outer cylinder, an inner cylinder and a plurality of fire tubes arranged between the outer cylinder and the inner cylinder, wherein the front end and the rear end of each fire tube and the front end and the rear end of the inner cylinder are respectively welded with a front tube plate and a rear tube plate; it is characterized in that a heat insulation coating is arranged around the outer side of the welding seam of the rear tube plate, the fire tube and the inner cylinder.
2. The anti-corrosion high temperature generator according to claim 1, wherein the rear end of the fire tube is also provided with a thermal barrier coating on the inside.
3. The anti-corrosive high temperature generator according to claim 2, wherein said fire tube is provided with a thermal barrier coating in a region extending along the rear end portion to the inner cavity of the fire tube by not less than 20 mm.
4. The anti-corrosion high-temperature generator according to claim 1, 2 or 3, wherein the inner side of the rear end of the inner cylinder is also provided with a thermal insulation coating.
5. The anti-corrosion high temperature generator according to claim 4, wherein the inner cylinder is provided with a thermal barrier coating in a region extending along the rear end portion to the cylinder inner cavity by not less than 20 mm.
6. The anti-corrosion high-temperature generator according to claim 1, 2 or 3, wherein the thermal barrier coating has a thickness of 0.2 to 5 mm.
7. The anti-corrosion high temperature generator according to claim 1, 2 or 3, wherein the weld between the rear tube plate and the fire tube is extended, and the weld is extended with a thermal insulation coating.
8. The anti-corrosion high temperature generator according to claim 7, wherein the length of the weld extension is no greater than 10 mm.
9. The anti-corrosion high-temperature generator according to claim 1, 2 or 3, wherein a weld between the rear tube plate and the inner cylinder extends outward, and a heat insulation coating is arranged at the weld extension.
10. The anti-corrosion high temperature generator according to claim 9, wherein the length of the weld extension is no greater than 20 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921788988.7U CN210718217U (en) | 2019-10-23 | 2019-10-23 | Anti-corrosion high-temperature generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921788988.7U CN210718217U (en) | 2019-10-23 | 2019-10-23 | Anti-corrosion high-temperature generator |
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| Publication Number | Publication Date |
|---|---|
| CN210718217U true CN210718217U (en) | 2020-06-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921788988.7U Active CN210718217U (en) | 2019-10-23 | 2019-10-23 | Anti-corrosion high-temperature generator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111811160A (en) * | 2020-07-01 | 2020-10-23 | 同方节能装备有限公司 | Anticorrosion structure of lithium bromide unit water system |
-
2019
- 2019-10-23 CN CN201921788988.7U patent/CN210718217U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111811160A (en) * | 2020-07-01 | 2020-10-23 | 同方节能装备有限公司 | Anticorrosion structure of lithium bromide unit water system |
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