CN212538895U - Non-welding finned tube condensation heat exchanger - Google Patents
Non-welding finned tube condensation heat exchanger Download PDFInfo
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- CN212538895U CN212538895U CN202020610502.7U CN202020610502U CN212538895U CN 212538895 U CN212538895 U CN 212538895U CN 202020610502 U CN202020610502 U CN 202020610502U CN 212538895 U CN212538895 U CN 212538895U
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Abstract
The utility model discloses a no welding finned tube condensation heat exchanger, including the casing, be provided with the heat transfer unit of no welding and tie point on the casing, heat transfer unit includes a plurality of heat exchange tubes that the interval certain distance was arranged in proper order, and the heat exchange tube adopts the curved system of seamless pipe to form. The utility model improves the flue gas flow passage by 5 percent compared with a heat exchanger with the same heat exchange efficiency; all finned tubes in the heat exchanger have no welding seams in the whole length, no poor welding quality and improved production efficiency.
Description
Technical Field
The utility model relates to a heat exchanger, concretely relates to no welding finned tube condensation heat exchanger belongs to heat exchanger equipment technical field.
Background
China is a country with large energy consumption, and energy conservation and emission reduction are long-term strategic guidelines in national economy in order to improve the situation. In order to improve the energy efficiency of the boiler, the boiler is provided with a flue gas waste heat recovery condensation heat exchanger commonly called an economizer.
The Economizer (Economizer) is a device installed at the lower part of a flue at the tail of a boiler and used for recovering waste heat of discharged smoke, and is called as an Economizer because the Economizer absorbs the heat of high-temperature smoke, reduces the temperature of the discharged smoke, saves energy and improves efficiency.
The steel tube finned coal economizer is generally made of a carbon steel tube with the outer diameter of 32-51 mm, and fins are added outside the tube to improve the heat transfer effect. The steel pipe type economizer consists of parallel elbow pipes (commonly called coiled pipes) which are horizontally arranged.
However, in the use process of the existing fully premixed condensing heat exchanger in recent years, a problem is found to be troubled for users, and the problem is that: the failure of the boiler economizer is mainly leakage of the coiled pipe. Most of the leakage is caused by (1) wear of the pipe wall, (2) poor welding quality, and (3) corrosion of the inner wall. There are also few cases where the weld is caused by other reasons such as poor pipe quality, cracks in the heat affected zone of the weld, etc.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to overcome prior art's the aforesaid not enough, provide one kind and can avoid the bubble to get into the anti-bubble coating disc who scribbles the machine.
In order to solve the above problem, the utility model adopts the following technical scheme: the utility model provides a no welding finned tube condensation heat exchanger, includes the casing, is provided with the heat transfer unit of no welding and tie point on the casing, and the heat transfer unit includes a plurality of heat exchange tubes of interval certain distance range in proper order, and the heat exchange tube adopts seamless pipe to bend and forms.
The following is the utility model discloses to the further optimization of above-mentioned scheme: the overall orthographic projection of the heat exchange tube is in a snake shape.
Further optimization: the heat exchange tube comprises a plurality of straight tube sections, and adjacent straight tube sections are integrally connected through bent tube sections.
Further optimization: and the two adjacent straight pipe sections are arranged in a staggered manner.
Further optimization: and the two bent pipe sections connected with the two ends of the straight pipe section form a certain included angle.
Further optimization: and fins are arranged on the part, positioned in the shell, of the straight pipe section.
Further optimization: the two ends of the heat exchange tube extend to the outside of the shell for a certain distance respectively and are communicated with a main pipeline.
Further optimization: and a flange joint is arranged on the main pipeline.
Further optimization: the part of the heat exchange tube positioned in the shell is treated by an enamel process.
Further optimization: the position in the shell, which is in contact with the flue gas, is treated by adopting an enamel process.
Through experimental test and use, the utility model discloses there are following beneficial effect and advantage:
1. the flue gas flow channel is optimized, and the heat exchange efficiency is improved by 5% compared with that of a heat exchanger with the same heat exchanger;
2. all finned tubes in the heat exchanger have no welding seams in the whole length, no poor welding quality and improved production efficiency.
The utility model discloses an usage has:
the heat exchanger can be used as a main heat exchanger of a gas-fired and oil-fired boiler;
can be used as a condensing heat exchanger of a gas-fired and oil-fired boiler.
The present invention will be further explained with reference to the drawings and examples.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a schematic structural view of a heat exchange device in an embodiment of the present invention;
FIG. 3 is a side view of FIG. 2;
fig. 4 is a schematic structural view of a heat exchange tube in an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a heat exchange tube according to an embodiment of the present invention.
In the figure: 1-a shell; 2-a flange joint; 3-a main pipeline; 4-heat exchange tube; 5-a cavity; 6-a fin; 7-a straight pipe section; 8-bending the pipe section; 9-bulge.
Detailed Description
In the embodiment, as shown in fig. 1 to 5, a non-welded finned tube condensation heat exchanger comprises a shell 1, wherein a heat exchange unit without welding and connection points is arranged on the shell 1, so that the problems in the prior art are solved.
The heat exchange unit comprises a plurality of heat exchange tubes 4 which are sequentially arranged at certain intervals, and the main body of each heat exchange tube 4 is positioned in a cavity 5 arranged on the shell 1.
Each heat exchange tube 4 is formed by bending a seamless tube, and the overall orthographic projection of the heat exchange tube 4 is S-shaped or snakelike.
Each heat exchange tube 4 comprises a plurality of parallel straight tube sections 7, and the adjacent straight tube sections 7 are integrally connected through U-shaped bent tube sections 8.
The two adjacent straight pipe sections 7 are arranged in a staggered mode, so that the design is convenient for disturbing the smoke flowing outside the heat exchange pipe 4, a vortex is formed, and heat exchange is facilitated.
Two bend sections 8 connected with two ends of the same straight pipe section 7 form a certain included angle, and the angle can be 90 degrees and can also be set to other angles according to requirements.
The part of the straight tube section 7, which is positioned in the shell 1, is provided with the fins 6, so that the design is convenient for improving the heat exchange efficiency.
Each elbow section 8 is arranged in the shell 1, a protrusion 9 is arranged on the side surface of the shell 1, and the protrusion 9 forms a groove for accommodating the elbow section 8 in the shell 1.
The bent pipe section 8 can be provided with fins 6 according to requirements, so that the heat exchange efficiency is further improved.
The two ends of each heat exchange tube 4 extend to the outside of the shell 1 for a certain distance respectively, a hole convenient for one end of the heat exchange tube 4 to penetrate is formed in the shell 1, and the hole is connected with the outer wall of the heat exchange tube 4 in a sealing mode.
One end of each heat exchange tube 4 is a heat exchange medium inlet end, the other end of each heat exchange tube 4 is a heat exchange medium output end, and the heat exchange medium inlet end on each heat exchange tube 4 is communicated with the same main pipeline 3 in a sealing mode.
Be provided with the cavity in the trunk line 3, and the both ends of trunk line 3 are sealed, and the position that one side of trunk line 3 is close to one end is provided with flange joint 2, designs like this and is convenient for be connected with other external equipment.
The part of each heat exchange tube 4 positioned in the shell 1 and the position in the shell 1 contacted with the flue gas are respectively treated by an enamel process so as to improve the corrosion resistance.
The upper end and the lower end of the shell 1 are respectively provided with an opening, and the rest parts are respectively in a sealing design, so that the boiler flue gas can enter from the upper opening of the shell 1 conveniently, and the lower opening of the shell can exit.
When the heat exchange unit is used, flue gas flows in the cavity 5 of the shell 1 and is absorbed by heat exchange media in the heat exchange tubes 4 when passing through the heat exchange unit.
The utility model discloses a whole seamless pipe is bent the preparation and is formed, has effectively reduced welding point and connector, improves the holistic sealing performance of heat exchange tube, and straight tube section dislocation set on the heat exchange tube has realized the interference that flows to the flue gas to make the flue gas form the vortex, improve heat exchange efficiency, will connect simultaneously and set up certain contained angle at two sections curved pipe sections of same straight tube section, realize the disturbance to heat transfer medium, further improve heat exchange efficiency.
Having shown and described the basic principles and essential features of the invention and advantages thereof, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof, and it is therefore intended that the embodiments be considered as exemplary and not limiting in any way, since the scope of the invention is defined by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein and are therefore not to be embraced therein by any reference numerals in the claims.
Claims (10)
1. A weldless finned tube condensing heat exchanger comprising a shell (1), characterized in that: the shell (1) is provided with a heat exchange unit without welding and connection points, the heat exchange unit comprises a plurality of heat exchange tubes (4) which are sequentially arranged at certain intervals, and the heat exchange tubes (4) are formed by bending seamless tubes.
2. A weldless finned tube condensing heat exchanger according to claim 1 wherein: the overall orthographic projection of the heat exchange tube (4) is in a snake shape.
3. A weldless finned tube condensation heat exchanger according to claim 1 or 2 wherein: the heat exchange tube (4) comprises a plurality of straight tube sections (7), and adjacent straight tube sections (7) are integrally connected through a bent tube section (8).
4. A weldless finned tube condensing heat exchanger according to claim 3 wherein: the two adjacent straight pipe sections (7) are arranged in a staggered manner.
5. A weldless finned tube condensing heat exchanger according to claim 3 wherein: two bent pipe sections (8) connected with two ends of the straight pipe section (7) form a certain included angle.
6. A weldless finned tube condensing heat exchanger according to claim 3 wherein: and fins (6) are arranged on the part, located in the shell (1), of the straight pipe section (7).
7. A weldless finned tube condensing heat exchanger according to claim 1 wherein: the two ends of the heat exchange tube (4) respectively extend to the outside of the shell (1) for a certain distance and are communicated with a main pipeline (3).
8. A weldless finned tube condensing heat exchanger according to claim 7 wherein: and a flange joint (2) is arranged on the main pipeline (3).
9. A weldless finned tube condensing heat exchanger according to claim 1 wherein: the part of the heat exchange tube (4) positioned in the shell (1) is treated by an enamel process.
10. A weldless finned tube condensing heat exchanger according to claim 1 wherein: the position in the shell (1) contacted with the flue gas is treated by an enamel process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020610502.7U CN212538895U (en) | 2020-04-22 | 2020-04-22 | Non-welding finned tube condensation heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020610502.7U CN212538895U (en) | 2020-04-22 | 2020-04-22 | Non-welding finned tube condensation heat exchanger |
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| Publication Number | Publication Date |
|---|---|
| CN212538895U true CN212538895U (en) | 2021-02-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020610502.7U Active CN212538895U (en) | 2020-04-22 | 2020-04-22 | Non-welding finned tube condensation heat exchanger |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113720176A (en) * | 2021-08-12 | 2021-11-30 | 北京航空航天大学 | Micro-channel heat exchanger with secondary fins |
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2020
- 2020-04-22 CN CN202020610502.7U patent/CN212538895U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113720176A (en) * | 2021-08-12 | 2021-11-30 | 北京航空航天大学 | Micro-channel heat exchanger with secondary fins |
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