CN214536220U - Waste heat recovery heat exchanger of household garbage incinerator - Google Patents
Waste heat recovery heat exchanger of household garbage incinerator Download PDFInfo
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- CN214536220U CN214536220U CN202120420011.0U CN202120420011U CN214536220U CN 214536220 U CN214536220 U CN 214536220U CN 202120420011 U CN202120420011 U CN 202120420011U CN 214536220 U CN214536220 U CN 214536220U
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Abstract
The utility model relates to a waste heat recovery heat exchanger of a household garbage incinerator. The heat exchange plate set is arranged in the shell and comprises a plurality of heat exchange plates, a low-temperature medium inlet pipe box, a low-temperature medium outlet pipe box, a high-temperature gas inlet and a high-temperature gas outlet are arranged on the shell, expansion joints are respectively welded between the low-temperature medium inlet pipe box and the low-temperature medium outlet pipe box, between the high-temperature gas inlet and the shell and between the high-temperature gas outlet and the shell on the shell, the heat exchange plates are formed by overlapping two metal plates which are welded at the periphery, the two metal plate main bodies are connected through a plurality of welding points, and the area between the welding points of the two metal plate main bodies is in an outward convex shape. The heat exchanger has strong heat transfer capacity and prevents the tube plate from being pulled to crack.
Description
Technical Field
The utility model relates to a waste heat recovery equipment technical field, specific heat transfer equipment that carries out waste heat recovery to the high temperature flue gas that garbage incinerator produced that says so.
Background
With the acceleration of urbanization in China, the problem of urban domestic garbage is increasingly prominent. The current municipal domestic waste treatment modes mainly comprise three modes of landfill, composting and incineration, wherein the incineration mode is used for treating the domestic waste to become a waste treatment technology which is generally adopted at home and abroad at present. But a large amount of harmful gases such as dioxin and the like are generated in the incineration process of the household garbage. Therefore, before being discharged to the atmosphere, the waste gas is treated, and generally, harmful gases such as dioxin are decomposed at high temperature by an incinerator, thereby reducing the emission of the harmful gases.
The incinerator carries out high-temperature flue gas (about 950 ℃) generated in the high-temperature decomposition process of harmful gases such as dioxin and the like into a high-temperature heat exchanger for waste heat recovery, and carries out heat energy exchange with low-temperature water or heat conducting oil. The traditional high-temperature gas-liquid heat exchanger mostly adopts a light pipe or finned tube heat exchanger, but the heat exchanger has the disadvantages of large volume, low heat exchange efficiency and heavy weight. In addition, under the working condition of high-temperature flue gas, the problems of high-temperature oxidation of the heat transfer element and tube plate tensile crack caused by thermal expansion exist.
Disclosure of Invention
The utility model aims at providing a waste heat recovery heat exchanger of domestic waste incinerator, this equipment heat transfer capacity is strong, and area is little, prevents moreover that the heat exchanger tube sheet from drawing the fracture.
The technical scheme of the utility model:
the waste heat recovery heat exchanger comprises a shell, wherein a heat exchange plate set is arranged in the shell, the heat exchange plate set is composed of a plurality of heat exchange plates, a low-temperature medium inlet pipe box, a low-temperature medium outlet pipe box, a high-temperature gas inlet and a high-temperature gas outlet are arranged on the shell, expansion joints are respectively welded between the low-temperature medium inlet pipe box and the low-temperature medium outlet pipe box, between the high-temperature gas inlet and the shell and between the high-temperature gas outlet and the shell on the shell, the heat exchange plates are formed by overlapping two metal plates, the peripheries of the two metal plates are welded and connected, the two metal plate main bodies are connected through a plurality of welding points, and the area between the welding points of the two metal plate main bodies is in an outward convex shape.
The utility model has the advantages that:
1. the heat exchanger has the advantages of small volume, high heat exchange efficiency and light weight. The heat exchange plates are connected through a plurality of welding points, then the heat exchange plates are expanded through high-pressure fluid to form an internal heat exchange medium channel, and the surfaces of the two metal plates are in arc-shaped wavy shapes. The arc-shaped wavy structure further enhances the heat transfer effect, and has strong heat transfer capacity, high pressure bearing capacity and stable welding performance, and laser melting penetration welding is carried out.
2. The expansion joint has been welded respectively between low temperature medium import pipe case and the low temperature medium export pipe case on the casing, between high temperature gas import and the casing, between high temperature gas export and the casing, expansion joint are used for absorbing the axial expansion displacement volume that the heat transfer panel group leads to because of the difference in temperature under the operating mode, prevent that the heat exchanger tube sheet from drawing and splitting.
Drawings
Fig. 1 is a schematic view of the overall structure of the present application.
Fig. 2 is a right side view of the present application.
Fig. 3 is a schematic structural view of the heat exchanger plate of the present application.
Fig. 4 is a cross-sectional view of the heat exchanger plate of the present application.
Detailed Description
In view of the above shortcomings of the prior art, the present application provides a hot plate heat exchanger for high temperature gas-liquid waste heat recovery, which solves the above problems existing in the prior art.
The application provides a waste heat recovery heat exchanger of a household garbage incinerator, which comprises a shell 1, wherein a heat exchange plate group 2 is arranged in the shell, a low-temperature medium inlet pipe box 3, a low-temperature medium outlet pipe box 4, a high-temperature gas inlet 5 and a high-temperature gas outlet 6 are arranged on the shell,
the heat exchange plate group 2 is arranged at intervals by adopting a plurality of heat exchange plates 7 and is juxtaposed in the heat exchange shell 1, the liquid inlet pipe 12 and the liquid outlet pipe 13 are respectively welded on the heat exchange plates 7, wherein the liquid inlet pipe 12 and the liquid outlet pipe 13 on the plurality of heat exchange plates 7 are respectively welded with the heat exchange shell 1 and then collect a plurality of liquid inlet and outlet pipe orifices, and the liquid inlet and outlet pipe orifices are communicated with the low-temperature medium inlet pipe box 3 and the low-temperature medium outlet pipe box 4. The high-temperature gas inlet 5 and the high-temperature gas outlet 6 are respectively arranged at two ends of the heat exchanger shell 1 and are provided with heat exchanger interface flanges 10 in a welding mode. The low-temperature medium inlet pipe box 3 is arranged on one side of the high-temperature gas outlet pipe box 6. The low-temperature medium outlet pipe box 4 is arranged on one side of the high-temperature gas inlet pipe box 5.
The heat exchange plate is formed by overlapping two metal plates, the peripheries of the two metal plates are connected in a welding mode, the two metal plate main bodies are connected through a plurality of welding points 15, and the other regions of the two metal plates except the welding points are in an outward protruding shape. The specific preparation process of the heat exchange plate of the application example is as follows: the heat exchange plate 7 is formed by overlapping two metal plates 8 and 9, welding the two metal plates together through laser penetration, and then expanding the metal plates through high-pressure fluid to form an internal heat exchange medium channel, wherein the surfaces of the metal plates are in a circular arc wavy shape. The heat exchange medium passage communicates with the liquid inlet pipe 12 and the liquid outlet pipe 13. The circular arc wavy structures on the two sides of the heat exchange plate further enhance the heat transfer effect, and the laser melting penetration welding has high pressure bearing capacity and stable welding performance.
In addition, the flow passage of the high-temperature gas is a straight-through structure and is formed by arranging a plurality of heat exchange plates 7 at intervals. Namely, the high-temperature flue gas flows to flow out from the high-temperature gas inlet 5 to the high-temperature gas outlet 6 in a straight line direction, so that the resistance drop can be further reduced. The flow channel of the low-temperature liquid is of an S-shaped structure, namely the low-temperature liquid flows from the low-temperature medium inlet pipe box 3 to the low-temperature medium outlet pipe box 4 and carries out cross flow heat exchange with the high-temperature gas in an S-shaped flow mode through internal heat exchange medium channels of a plurality of heat exchange plates 7.
According to the expansion joint welding device, expansion joints are respectively welded between a low-temperature medium inlet pipe box 3 and a low-temperature medium outlet pipe box 4, between a high-temperature gas inlet 5 and a shell 1 and between a high-temperature gas outlet 6 and the shell 1 on the shell, and the shapes of the expansion joints are the same as the shape of the cross section of the shell. The expansion joint 11 is used for absorbing the axial expansion displacement of the heat exchange plate group 2 caused by temperature difference under the working condition, and prevents the tube plate of the heat exchanger from being pulled to crack.
Claims (1)
1. The utility model provides a waste heat recovery heat exchanger of domestic waste incinerator, includes the casing, installs heat transfer plate group in the casing, heat transfer plate group comprises a plurality of heat transfer plates, installs low temperature medium import pipe case, low temperature medium export pipe case, high-temperature gas import, high-temperature gas export on the casing, its characterized in that: expansion joints are respectively welded between a low-temperature medium inlet pipe box and a low-temperature medium outlet pipe box, between a high-temperature gas inlet and the shell and between a high-temperature gas outlet and the shell on the shell, the heat exchange plate is formed by overlapping two metal plates, the peripheries of the two metal plates are welded and connected, the two metal plate main bodies are connected through a plurality of welding points, and the area between the welding points of the two metal plate main bodies is in an outward convex shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120420011.0U CN214536220U (en) | 2021-02-26 | 2021-02-26 | Waste heat recovery heat exchanger of household garbage incinerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120420011.0U CN214536220U (en) | 2021-02-26 | 2021-02-26 | Waste heat recovery heat exchanger of household garbage incinerator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214536220U true CN214536220U (en) | 2021-10-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120420011.0U Active CN214536220U (en) | 2021-02-26 | 2021-02-26 | Waste heat recovery heat exchanger of household garbage incinerator |
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| Country | Link |
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| CN (1) | CN214536220U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115355741A (en) * | 2022-09-21 | 2022-11-18 | 中金泰达环保科技有限公司 | Heat exchanger |
-
2021
- 2021-02-26 CN CN202120420011.0U patent/CN214536220U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115355741A (en) * | 2022-09-21 | 2022-11-18 | 中金泰达环保科技有限公司 | Heat exchanger |
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