CN219200112U - Spiral tube type heat exchanger and boiler - Google Patents
Spiral tube type heat exchanger and boiler Download PDFInfo
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- CN219200112U CN219200112U CN202320258361.0U CN202320258361U CN219200112U CN 219200112 U CN219200112 U CN 219200112U CN 202320258361 U CN202320258361 U CN 202320258361U CN 219200112 U CN219200112 U CN 219200112U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
Abstract
The utility model provides a spiral tube type heat exchanger and a boiler, relates to the technical field of heat exchangers, and solves the problems of dry combustion and low heat exchange efficiency caused by the adoption of the existing heat exchanger; the combustion chamber is provided with a first port and a second port which are communicated with the inner cavity of the combustion chamber, and the first port is used for being connected with a combustor; the discharge end of the spiral heat exchange coil is connected with the second port; the water tank is used for introducing circulating water, wherein the combustion chamber and the spiral heat exchange coil are both arranged in the water tank, and the discharge end of the spiral heat exchange coil is connected with the water tank and communicated with the outside environment of the water tank. Compared with the prior art, the heat exchange surface of the whole heat exchanger is of a fully immersed structural design, no dry burning surface exists, the condition that the heat exchanger is damaged by dry burning can be avoided, and the heat exchange efficiency can be improved.
Description
Technical Field
The utility model relates to the technical field of heat exchangers, in particular to a spiral tube type heat exchanger and a boiler.
Background
The utility model patent application with the application publication number of CN110726243A discloses a boiler adopting a spiral flat tube heat exchanger, two ends of the spiral flat tube adopted by the boiler are respectively connected with a water collecting and distributing box, a water inlet pipe and a water outlet pipe are arranged on the water collecting and distributing box, a combustion head of a combustor stretches into the inner side of the spiral flat tube from one end of the spiral flat tube, and hot water is obtained by heating water in the spiral flat tube through high-temperature flue gas and flame of combustion.
The spiral flat pipe and the burner are used separately, circulating water is led into the spiral flat pipe, the burner provides heat for heating water, the water is heated from the outside of the spiral flat pipe, and if the water in the spiral flat pipe is unevenly distributed, or the water quantity is less or no water exists, or the heat of the burner is unevenly distributed, the risk of dry combustion exists. And the high-temperature flue gas from the burner can be rapidly discharged from a flue gas outlet on the shell after passing through the inner side of the spiral flat tube, the heat exchange time and the heat exchange area with water are limited, and the problem of low heat exchange efficiency exists.
Disclosure of Invention
The utility model aims to design a spiral tube type heat exchanger and a boiler, which are used for solving the problems of dry combustion and lower heat exchange efficiency caused by the adoption of the existing heat exchanger.
The utility model is realized by the following technical scheme:
the utility model provides a spiral tube type heat exchanger, which comprises a combustion chamber, a spiral heat exchange coil and a water tank; the combustion chamber is provided with a first port and a second port which are communicated with the inner cavity of the combustion chamber, and the first port is used for being connected with a combustor; the discharge end of the spiral heat exchange coil is connected with the second port; the water tank is used for introducing circulating water, wherein the combustion chamber and the spiral heat exchange coil are both arranged in the water tank, and the discharge end of the spiral heat exchange coil is connected with the water tank and communicated with the outside environment of the water tank.
When the structure is adopted, the combustion chamber and the spiral heat exchange coil are arranged in the water tank, so that the combustion chamber and the spiral heat exchange coil are used as a channel of high-temperature flue gas generated by the burner, a fully immersed fire tube structure is formed, no dry burning surface exists, and the condition that the heat exchanger is damaged by dry burning can be avoided. The unique shape of the spiral heat exchange coil can enable the smoke stroke to be longer, high-speed convection heat exchange of smoke can be completed in the spiral heat exchange coil, high heat exchange efficiency can be guaranteed, in addition, smoke and dust wall hanging in the spiral heat exchange coil can be avoided by high-speed smoke, and the durability of products can be guaranteed.
Further, in order to better realize the utility model, the following arrangement structure is adopted: the discharge end of the spiral heat exchange coil is connected with the water tank through a smoke discharging connector.
Further, in order to better realize the utility model, the following arrangement structure is adopted: the first port of the combustion chamber is provided with a mounting flange for connection with a burner.
Further, in order to better realize the utility model, the following arrangement structure is adopted: the spiral heat exchange coil is arranged as a single coil.
When the structure is adopted, the spiral heat exchange coil is arranged as a single coil, so that the smoke travel is long, the smoke flow velocity is high, and the heat exchange efficiency is high. Meanwhile, the coil pipe structure ensures that the middle of the spiral heat exchange coil pipe is not welded, and the coil pipe is formed by one-step processing, so that excessive welded junctions can be avoided, and the service life can be prolonged
Further, in order to better realize the utility model, the following arrangement structure is adopted: the cross section of the spiral heat exchange coil is round.
Further, in order to better realize the utility model, the following arrangement structure is adopted: the combustion chamber comprises a straight barrel section and a reducing section which are sequentially connected, and the small end of the reducing section is provided with the second port.
Further, in order to better realize the utility model, the following arrangement structure is adopted: the second port of the combustion chamber is arranged on the inner side of the spiral heat exchange coil, the second port is connected with an elbow extending towards the first port, and the elbow is connected with the discharge end of the spiral heat exchange coil.
Further, in order to better realize the utility model, the following arrangement structure is adopted: the combustion chamber and the spiral heat exchange coil are coaxially arranged.
Further, in order to better realize the utility model, the following arrangement structure is adopted: the combustion chamber and the spiral heat exchange coil are arranged as stainless steel structural members.
By adopting the arrangement structure, the stainless steel combustion chamber and the spiral heat exchange coil have better corrosion resistance.
The utility model also provides a boiler, which comprises a boiler body, a burner and the spiral tube type heat exchanger, wherein the burner and the spiral tube type heat exchanger are connected to the boiler body; the first port of the combustion chamber of the spiral tube type heat exchanger is connected with the burner, and the combustion head of the burner stretches into the combustion chamber.
Further, in order to better realize the utility model, the following arrangement structure is adopted: the combustion chamber is vertically arranged in a posture that a first port is arranged at the upper part and a second port is arranged at the lower part.
When the structure is adopted, flame generated by the burner burns in the combustion chamber, after radiation and convection heat exchange are carried out in the combustion chamber, high-temperature flue gas enters the exhaust end at the upper part of the spiral heat exchange coil pipe from the combustion chamber, after that, the high-temperature flue gas can carry out the convection heat exchange from top to bottom at a high speed in the spiral heat exchange coil pipe, and meanwhile, water and flue gas are reversely and vertically exchanged, so that the flue gas is gradually cooled, and the flue gas can be discharged out of the water tank through the smoke discharging connector after heat containing vaporization latent heat is exchanged at one time.
Further, in order to better realize the utility model, the following arrangement structure is adopted: the water inlet of the water tank is arranged below the water outlet.
The utility model has the following advantages and beneficial effects:
in the utility model, the combustion chamber and the spiral heat exchange coil are arranged in the water tank, so that the combustion chamber and the spiral heat exchange coil are used as a channel of high-temperature flue gas generated by the burner to form a fully immersed fire tube structure, no dry burning surface exists, and the condition that the heat exchanger is damaged by dry burning can be avoided. The unique shape of the spiral heat exchange coil can enable the smoke stroke to be longer, high-speed convection heat exchange of smoke can be completed in the spiral heat exchange coil, high heat exchange efficiency can be guaranteed, in addition, smoke and dust wall hanging in the spiral heat exchange coil can be avoided by high-speed smoke, and the durability of products can be guaranteed.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 shows the structure of a spiral tube heat exchanger (the water tank is shown in broken lines);
FIG. 2 shows the configuration of the combustion chamber and spiral heat exchange coil;
FIG. 3 illustrates the heat exchange pattern of a spiral tube heat exchanger;
FIG. 4 shows the internal flue gas flow direction of a spiral tube heat exchanger;
fig. 5 is a schematic structural view of a boiler.
Marked in the figure as:
1. a mounting flange;
2. a combustion chamber; 21. a straight barrel section; 22. a reducing section; 23. a first port; 24. a second port;
3. a spiral heat exchange coil;
4. a smoke discharging joint;
5. a burner;
6. a water tank;
7. a boiler body;
8. and (3) bending the pipe.
Detailed Description
In order to make the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be described in detail below. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, based on the examples herein, which are within the scope of the utility model as defined by the claims, will be within the scope of the utility model as defined by the claims.
In the description of the present utility model, it is to be noted that, unless otherwise indicated, the meaning of "plurality" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front," "rear," "head," "tail," and the like are used as an orientation or positional relationship based on that shown in the drawings, merely to facilitate description of the utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the utility model. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model can be understood as appropriate by those of ordinary skill in the art.
Example 1:
the heat exchange surface of the whole heat exchanger is of a full-immersed structural design, no dry burning surface exists, the condition of damaging the heat exchanger by dry burning can be avoided, and the heat exchange efficiency can be improved, as shown in fig. 1, 2, 3, 4 and 5, the heat exchange surface is particularly provided with the following structure:
in this embodiment, the spiral tube type heat exchanger is mainly used as a heat exchanger of a boiler or a water heater.
As shown in fig. 1, the spiral tube heat exchanger includes a combustion chamber 2, a spiral heat exchange coil 3, and a water tank 6.
The water tank 6 is used for introducing circulating water, and is provided with a water inlet and a water outlet.
The combustion chamber 2 has an inner cavity and a first port 23 and a second port 24 which are communicated with the inner cavity and mainly serve as a place for combustion of fuel gas; the spiral heat exchange coil 3 adopts a single-tube structure, the cross section of the coil is round, and the spiral heat exchange coil 3 is used as a channel for high-temperature flue gas circulation. The combustion chamber 2 and the helical heat exchange coil 3 are connected to form an assembly which is wholly housed in the tank 6, with an annulus being formed between the outside of the assembly and the tank 6 for water to flow between the assembly and the inner wall of the tank 6.
As shown in fig. 2-4, the inner diameter of the combustion chamber 2 is larger than the diameter of the spiral heat exchange coil 3. The combustion chamber 2 comprises a straight barrel section 21 and a reduced diameter section 22 which are sequentially connected, wherein a first port 23 is arranged at the straight barrel section 21, the first port 23 is connected with a mounting flange 1, and the combustion chamber 2 can be fixedly connected with a connecting flange of the combustor 5 through the mounting flange 1; the second port 24 is disposed at the small end of the reducing section 22, the discharge end of the spiral heat exchange coil 3 is connected with the second port 24 through a pipeline, and the discharge end of the spiral heat exchange coil 3 is connected with the smoke outlet on the water tank 6 through the smoke discharging joint 4 connected, so that the smoke can be discharged from the smoke outlet to the environment outside the water tank 6.
In this embodiment, preferably, the water tank 6 is erected, the water inlet is arranged below the water outlet, and the smoke outlet is arranged at the bottom of the water tank 6. The axes of the combustion chamber 2 and the spiral heat exchange coil 3 are vertically arranged, and the assembly formed by the combustion chamber 2 and the spiral heat exchange coil 3 is positioned at the center of the water tank 6. The materials of the combustion chamber 2 and the spiral heat exchange coil 3 are stainless steel so as to have better corrosion resistance.
In this embodiment, the combustion chamber 2 and the spiral heat exchange coil 3 are arranged in the water tank 6, so that the combustion chamber 2 and the spiral heat exchange coil 3 are used as a channel of high-temperature flue gas generated by the burner to form a fully immersed fire tube structure, no dry burning surface exists, and the condition that the heat exchanger is damaged by dry burning can be avoided. The unique shape of the spiral heat exchange coil 3 can enable the smoke stroke to be longer, high-speed convection heat exchange of smoke can be completed in the spiral heat exchange coil 3, high heat exchange efficiency can be guaranteed, in addition, smoke and dust wall hanging in the spiral heat exchange coil 3 can be avoided by high-speed smoke, and the durability of products can be guaranteed. The spiral heat exchange coil 3 is arranged as a single coil, so that the flue gas travel is long, the flue gas flow velocity is high, and the heat exchange efficiency is high. Meanwhile, the middle of the spiral heat exchange coil 3 is not welded due to the structure of the coil, and the coil is formed by one-step processing, so that excessive welded junctions can be avoided, and the service life can be prolonged.
Example 2:
the embodiment is further optimized based on the embodiment, and further, for better realizing the utility model, the following arrangement structure is adopted:
in this embodiment, the combustion chamber 2 and the spiral heat exchange coil 3 of the spiral tube type heat exchanger are coaxially arranged, meanwhile, the combustion chamber 2 is inserted into the inner side of the spiral heat exchange coil 3, the second port 24 of the combustion chamber 2 is located in the inner side of the spiral heat exchange coil 3, and the first port 23 is located outside the spiral heat exchange coil 3, so that the second port 24 of the combustion chamber 2 is located between the discharge end and the discharge end of the spiral heat exchange coil 3.
As shown in fig. 4, the second port 24 of the combustion chamber 2 is connected to a bent pipe 8, and the free end of the bent pipe 8 is bent toward the first port 23 and then extends in the axial direction of the combustion chamber 2 to be connected to the discharge end of the spiral heat exchange coil 3.
The water inlet of the water tank 6 is arranged below the water outlet.
As shown in fig. 3 and 4, the high-temperature flue gas generated after the combustion of the gas in the combustion chamber 2 firstly runs downwards to the second port 24, then upwards through the bent pipe 8, then enters the spiral heat exchange coil 3 from the discharge end, and then runs from top to bottom along the coil to the discharge end for discharge. The high-temperature flue gas exchanges heat with water in the water tank 6 in the process of passing through the combustion chamber 2 and the spiral heat exchange coil 3, and the flue gas also exchanges heat by convection. When high-temperature flue gas flows from top to bottom along the spiral heat exchange coil 3, the flue gas gradually lowers the temperature and finally condenses, and finally reaches a smoke exhaust joint for discharge, meanwhile, the water in the water tank 6 is heated from bottom to top, the water inlet of the water tank 6 is arranged below the water outlet, the water temperature is gradually heated upwards, the water and the flue gas are subjected to reverse vertical heat exchange, and the flue gas can be discharged out of the water tank 6 through the smoke exhaust joint after heat containing vaporization latent heat is exchanged.
Example 3:
the embodiment further provides a boiler based on the embodiment, and particularly adopts the following arrangement structure:
in this embodiment, as shown in fig. 5, the boiler includes a vertically arranged boiler body 7, a burner 5, and the spiral tube heat exchanger of the above embodiment.
In this embodiment, the burner 5 is selected to be a fully premixed gas ultra low nitrogen burner.
The burner 5 and the spiral tube heat exchanger are connected to the boiler body 7, and the burner 5 and the spiral tube heat exchanger are located above the spiral tube heat exchanger.
The combustion chamber 2 is vertically arranged in a posture that the first port 23 is at the upper and the second ports 24 are at the lower, and the spiral heat exchange coil 3 is also vertically arranged.
The first port 23 of the combustion chamber 2 of the spiral tube heat exchanger is fixedly connected with the connecting flange of the burner 5 upwards, and the combustion head of the burner 5 extends downwards from the first port 23 into the cavity of the combustion chamber 2.
In this embodiment, the flame generated by the burner burns in the combustion chamber 2, after radiation and convection heat exchange are performed in the combustion chamber 2, high-temperature flue gas enters the exhaust end at the upper part of the spiral heat exchange coil 3 from the combustion chamber 2, after that, the high-temperature flue gas can perform the convection heat exchange from top to bottom at a high speed in the spiral heat exchange coil 3, and meanwhile, water and flue gas are reversely and vertically exchanged, so that the flue gas is gradually cooled, and the flue gas can be discharged out of the water tank 6 through the smoke discharging connector after heat containing vaporization latent heat is exchanged at one time.
The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present utility model.
Claims (10)
1. A spiral tube heat exchanger, characterized in that: comprising the following steps:
a combustion chamber (2), wherein the combustion chamber (2) is provided with a first port (23) and a second port (24) which are communicated with the inner cavity of the combustion chamber, and the first port (23) is used for being connected with a combustor;
a spiral heat exchange coil (3) with a discharge end connected to the second port (24);
the water tank (6) is used for introducing circulating water, wherein the combustion chamber (2) and the spiral heat exchange coil (3) are both arranged in the water tank (6), and the discharge end of the spiral heat exchange coil (3) is connected with the water tank (6) and is communicated with the outside environment of the water tank (6).
2. A spiral tube heat exchanger according to claim 1, wherein: the discharge end of the spiral heat exchange coil (3) is connected with the water tank (6) through a smoke discharging connector (4).
3. A spiral tube heat exchanger according to claim 1, wherein: the first port (23) of the combustion chamber (2) is provided with a mounting flange (1) for connection with a burner.
4. A spiral tube heat exchanger according to claim 1, wherein: the spiral heat exchange coil (3) is arranged as a single coil.
5. A spiral tube heat exchanger according to claim 4, wherein: the cross section of the spiral heat exchange coil (3) is round.
6. A spiral tube heat exchanger according to claim 1, wherein: the combustion chamber (2) comprises a straight barrel section (21) and a reduced diameter section (22) which are sequentially connected, and the small end of the reduced diameter section (22) is provided with the second port (24).
7. A spiral tube heat exchanger according to any one of claims 1-6, wherein: the second port (24) of the combustion chamber (2) is arranged on the inner side of the spiral heat exchange coil (3), the second port (24) is connected with an elbow (8) extending towards the first port (23), and the elbow (8) is connected with the discharge end of the spiral heat exchange coil (3).
8. A spiral tube heat exchanger according to claim 7, wherein: the combustion chamber (2) and the spiral heat exchange coil (3) are coaxially arranged.
9. A boiler, characterized in that: comprising a boiler body (7), a burner (5) and a spiral tube heat exchanger according to any of claims 1-8, said burner (5) and said spiral tube heat exchanger being connected to said boiler body (7); a first port (23) of a combustion chamber (2) of the spiral tube type heat exchanger is connected with the burner (5), and a combustion head of the burner (5) stretches into the combustion chamber (2).
10. A boiler according to claim 9, characterized in that: the combustion chamber (2) is vertically arranged in a posture that a first port (23) is arranged at the upper position and a second port (24) is arranged at the lower position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320258361.0U CN219200112U (en) | 2023-02-06 | 2023-02-06 | Spiral tube type heat exchanger and boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320258361.0U CN219200112U (en) | 2023-02-06 | 2023-02-06 | Spiral tube type heat exchanger and boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219200112U true CN219200112U (en) | 2023-06-16 |
Family
ID=86715379
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320258361.0U Active CN219200112U (en) | 2023-02-06 | 2023-02-06 | Spiral tube type heat exchanger and boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219200112U (en) |
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2023
- 2023-02-06 CN CN202320258361.0U patent/CN219200112U/en active Active
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