CN214892717U - Flue gas heat exchanger for waste incineration power plant - Google Patents
Flue gas heat exchanger for waste incineration power plant Download PDFInfo
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- CN214892717U CN214892717U CN202022983391.7U CN202022983391U CN214892717U CN 214892717 U CN214892717 U CN 214892717U CN 202022983391 U CN202022983391 U CN 202022983391U CN 214892717 U CN214892717 U CN 214892717U
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- fluoroplastic
- heat exchange
- flue gas
- exchange tube
- heat exchanger
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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
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Abstract
The utility model discloses a gas heater for msw incineration power plant, include: the fluoroplastic heat exchange tube is internally provided with hot flue gas; the fluoroplastic pore plate comprises a plurality of pores, the fluoroplastic heat exchange tubes are arranged in the pores, and the fluoroplastic pore plate further comprises a pore flanging structure which at least partially wraps the fluoroplastic heat exchange tubes; the heat exchange tube flanging is wrapped on the outer side of the hole flanging structure, so that the fluoroplastic heat exchange tube and the fluoroplastic pore plate are fixed. According to the utility model provides a flue gas heat exchanger for msw incineration power plant makes hole hem structure and fluoroplastics heat exchange tube firmly cramp through the heat exchange tube turn-ups, has realized the fixed of fluoroplastics heat exchange tube with the fluoroplastics orifice plate, has avoided the flue gas to leak, has guaranteed the leakproofness of structure.
Description
Technical Field
The utility model relates to a refuse treatment field particularly relates to a gas heater for msw incineration power plant.
Background
The flue gas generated after the garbage incineration contains SO2Acid gases such as HCl and HF are used for preventing waste of flue gas waste heat caused by water spraying and cooling, and meanwhile, the acid gases are prevented from being further combined with water vapor in the flue gas to form corresponding acid vapor to corrode equipment under the low-temperature condition. The traditional flue gas heat exchanger adopts a metal heat exchanger, and the problem that the metal heat exchange tube is easy to corrode and perforate due to the fact that the temperature in the heat exchange process is lower than the acid dew point temperature of flue gasIn order to prevent the corrosion of acid gas in the waste incineration flue gas to the heat exchange tube, a corrosion-resistant fluoroplastic material can be selected as a raw material of the heat exchange tube.
However, the coefficient of thermal expansion of the fluoroplastic is several times that of the metal, so that the fluoroplastic heat exchange tube can be thermally expanded in high-temperature flue gas, the problems of sealing and air leakage between the fluoroplastic heat exchange tube and the pore plate and the like can be caused, and the problem that the pore plate is concentrated in stress and even cracks due to the deformation of the fluoroplastic heat exchange tube can be caused.
Therefore, there is a need to provide a new flue gas heat exchanger for a waste incineration plant to solve the above problems.
SUMMERY OF THE UTILITY MODEL
In the summary section a series of concepts in a simplified form is introduced, which will be described in further detail in the detailed description section. The inventive content does not imply any attempt to define the essential features and essential features of the claimed solution, nor is it implied to be intended to define the scope of the claimed solution.
The utility model provides a gas heater for msw incineration power plant, include:
the fluoroplastic heat exchange tube is internally provided with hot flue gas;
the fluoroplastic pore plate comprises a plurality of pores, the fluoroplastic heat exchange tubes are arranged in the pores, and the fluoroplastic pore plate further comprises a pore flanging structure which at least partially wraps the fluoroplastic heat exchange tubes;
the heat exchange tube flanging is wrapped on the outer side of the hole flanging structure so as to seal the fluoroplastic heat exchange tube and the fluoroplastic pore plate.
Further, the fluoroplastic pore plate further comprises a fixing structure for fixedly arranging the fluoroplastic pore plate.
Further, fluoroplastics orifice plate still includes the ripple and turns over a structure, the ripple turns over a structure and is located the hole with between the fixed knot structure, be used for the buffering fluoroplastics heat exchange tube is heated deformation and is leaded to fluoroplastics orifice plate internal stress concentrates.
Further, the fluoroplastic pore plate extends along the horizontal direction, and the extending direction of the hole flanging structure is perpendicular to the extending direction of the fluoroplastic pore plate.
Further, the heat exchange tube flanging is arranged at the lower port of the fluoroplastic heat exchange tube.
Further, cold flue gas flows through the upper part of the fluoroplastic pore plate to exchange heat with hot flue gas in the fluoroplastic heat exchange tube, and the hot flue gas after heat exchange is discharged to the lower part of the fluoroplastic pore plate from the lower port of the fluoroplastic heat exchange tube.
Further, the fluoroplastic heat exchange tubes and the fluoroplastic pore plates are made of polytetrafluoroethylene or polytetrafluoroethylene modified plastics.
Further, still include side flange and lower outlet flange, fixed knot constructs by side flange with the outlet flange presss from both sides the fastening.
Further, the side flange is located above the fluoroplastic pore plate, a fluoroplastic lining plate covers the side flange, the lower outlet flange is located below the fluoroplastic pore plate, and an anticorrosive coating covers the lower outlet flange.
According to the utility model provides a flue gas heat exchanger for msw incineration power plant makes hole hem structure and fluoroplastics heat exchange tube firmly cramp through the heat exchange tube turn-ups, has realized the fixed of fluoroplastics heat exchange tube with the fluoroplastics orifice plate, has avoided the flue gas to leak, has guaranteed the leakproofness of structure.
Drawings
The following drawings of the present invention are used herein as part of the present invention for understanding the present invention. There are shown in the drawings, embodiments and descriptions of the invention, which are used to explain the principles of the invention.
In the drawings:
fig. 1 is a schematic structural diagram of a flue gas heat exchanger for a waste incineration plant according to an exemplary embodiment of the present invention.
Reference numerals
1. Fluoroplastic heat exchange tube
2. Fluoroplastic orifice plate
21. Hole edge folding structure
22. Corrugated folding structure
23. Fixing structure
3. Heat exchange tube flanging
4. Side flange
41. Fluoroplastic lining board
5. Lower outlet flange
51. Anti-corrosion coating
Detailed Description
In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the present invention.
In order to fully understand the present invention, a detailed description will be provided in the following description to illustrate the flue gas heat exchanger for a waste incineration power plant of the present invention. It is apparent that the practice of the invention is not limited to the specific details familiar to those skilled in the art of waste treatment. The preferred embodiments of the present invention are described in detail below, however, other embodiments of the present invention are possible in addition to these detailed descriptions.
It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the invention. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
Exemplary embodiments according to the present invention will now be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to only the embodiments set forth herein. It is to be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of these exemplary embodiments to those skilled in the art. In the drawings, the thicknesses of layers and regions are exaggerated for clarity, and the same elements are denoted by the same reference numerals, and thus the description thereof will be omitted.
The existing fluoroplastic heat exchange tube has a larger thermal expansion coefficient than metal and has severer fluoroplastic welding conditions than metal, so that the sealing problem caused by expansion is very important. According to the working condition of a waste incineration power plant, when the inlet temperature is about 140 ℃, the axial thermal expansion of the fluoroplastic heat exchange tube is about 0.018mm/mm, so that a fluoroplastic tube with the length of 10m can expand by about 180mm under the thermal expansion, while the radial expansion is limited by the size of the tube diameter, the expansion amount of the fluoroplastic heat exchange tube with the outer diameter of 50mm is about 0.9mm, and because the tail end of the heat exchange tube is close to the outlet of the heat exchanger, the outlet temperature is about 100 ℃, and the radial expansion amount is smaller (less than 0.9 mm). Therefore, the fluoroplastic flue gas heat exchanger has the problem of sealing and air leakage. The existing fluoroplastic sealing technology comprises welding, and the fluoroplastic welding has the defects of harsh welding conditions, toxic and harmful substances generated in the welding process, complex welding process and the like.
To the above problem, the utility model provides a gas heater for msw incineration power plant, as shown in FIG. 1, include:
the fluoroplastic heat exchange tube 1 is internally provided with hot flue gas;
the fluoroplastic pore plate 2 comprises a plurality of pores, the fluoroplastic heat exchange tube 1 is installed in the pores, the fluoroplastic pore plate 2 further comprises a pore flanging structure 21, and the pore flanging structure 21 at least partially wraps the fluoroplastic heat exchange tube 1;
the heat exchange tube flanging 3 is wrapped on the outer side of the hole flanging structure 21, so that the fluoroplastic heat exchange tube 1 and the fluoroplastic pore plate 2 are sealed.
Referring to fig. 1, the utility model provides an be provided with multiseriate fluoroplastics heat exchange tube 1 in the gas heater, the hot flue gas that does not cool down and deacidify processing (about 140 ℃) flows from top to bottom in fluoroplastics heat exchange tube 1, and fluoroplastics heat exchange tube 1's lower extreme is exhanst gas outlet, promptly, through heat transfer (cooling) but the flue gas that does not deacidify processing is discharged from fluoroplastics heat exchange tube 1's lower extreme.
Illustratively, the fluoroplastic heat exchange tube 1 is made of fluoroplastic, so that the corrosion of acid gas in hot flue gas to the heat exchange tube is avoided, and the service life of the heat exchange tube is prolonged.
Illustratively, the fluoroplastic material includes, but is not limited to, Polytetrafluoroethylene (PTFE) or a PTFE-modified plastic, such as a fusible Polytetrafluoroethylene (PFA).
In one embodiment, the flue gas (about 100 ℃) subjected to heat exchange discharged from the flue gas heat exchanger enters the wet deacidification tower, and the deacidified flue gas enters the outer side of the fluoroplastic heat exchange tube 1 in the flue gas heat exchanger again to exchange heat with the hot flue gas in the fluoroplastic heat exchange tube 1 as cold flue gas (about 65 ℃).
The utility model provides a gas heater still includes fluoroplastics orifice plate 2. On the one hand, fluoroplastic pore plate 2 is used for fixing above-mentioned multiseriate fluoroplastic heat exchange tube 1, specifically, fluoroplastic pore plate 2 has seted up a plurality of holes, fluoroplastic heat exchange tube 1 installs in the hole, as shown in fig. 1. On the other hand, the fluoroplastic pore plate 2 can also be used for separating flue gas, specifically, the fluoroplastic pore plate 2 extends in the horizontal direction (i.e., is horizontally arranged), and cold flue gas flows above the fluoroplastic pore plate 2 to exchange heat with hot flue gas in the fluoroplastic heat exchange tube 1; the lower part of the fluoroplastic pore plate 2 is hot flue gas discharged from the lower port of the fluoroplastic heat exchange tube 1 after heat exchange.
Illustratively, the fluoroplastic orifice plate 2 is made of fluoroplastic, so that acidic gas in the flue gas is prevented from corroding the fluoroplastic orifice plate 2, and the service life of the fluoroplastic orifice plate 2 is prolonged.
Illustratively, the fluoroplastic material includes, but is not limited to, Polytetrafluoroethylene (PTFE) or a PTFE-modified plastic, such as a fusible Polytetrafluoroethylene (PFA).
It should be noted that the joint of the fluoroplastic heat exchange tube 1 and the fluoroplastic pore plate 2 should have sealing performance. Therefore, the fluoroplastic heat exchange tube 1 is arranged in the hole of the fluoroplastic pore plate 2 and is in close contact with the hole without a gap so as to avoid gas leakage of flue gas.
Illustratively, the fluoroplastic orifice plate 2 further comprises an orifice folding structure 21, the orifice folding structure 21 is disposed at an edge of the orifice, and an extending direction of the orifice folding structure 21 is perpendicular to an extending direction of the fluoroplastic orifice plate 2.
In one embodiment, as shown in fig. 1, two sides or peripheries of each hole are provided with hole flanging structures 21 extending downward, and the extending direction of each hole flanging structure is parallel to the side wall of the fluoroplastic heat exchange tube 1, so that the hole flanging structures 21 can at least partially wrap the outer wall of the fluoroplastic heat exchange tube 1, thereby ensuring the sealing performance of the structure and avoiding the leakage of smoke.
Further, the utility model provides a flue gas heat exchanger still includes heat exchange tube turn- ups 3, 3 parcels of heat exchange tube turn-ups are in the 21 outsides of hole hem structure, in order to realize fluoroplastics heat exchange tube 1 with fluoroplastics orifice plate 2's is fixed.
In one embodiment, as shown in fig. 1, in order to prevent air leakage between the fluoroplastic heat exchange tube 1 and the hole flanging structure 21, the hole flanging structure 21 and the portion of the fluoroplastic heat exchange tube 1 wrapped by the hole flanging structure are tightly hooped by the heat exchange tube flanging 3, so as to form a fluoroplastic heat exchange tube-hole flanging structure-heat exchange tube flanging sandwich structure. In this embodiment, the heat exchange tube flange 3 is disposed at the lower port of the fluoroplastic heat exchange tube 1.
Illustratively, the heat exchange tube flanging 3 is made of fluoroplastic, so that the corrosion of acidic gas in flue gas to the heat exchange tube flanging 3 is avoided, and the service life of the heat exchange tube flanging 3 is prolonged.
Illustratively, the fluoroplastic material includes, but is not limited to, Polytetrafluoroethylene (PTFE) or a PTFE-modified plastic, such as a fusible Polytetrafluoroethylene (PFA).
Through setting up heat exchange tube turn-ups 3, make fluoroplastics heat exchange tube 1 closely fixed with hole hem structure 21, not only avoided taking place relative displacement (for example, the slippage) because of expend with heat and contract with cold or vibration between the two, make the two move downwards together when fluoroplastics heat exchange tube 1 is heated the inflation, avoided moreover because of the different fluoroplastics heat exchange tube 1 of temperature field is heated inconsistent expansion that leads to and causes the flue gas leakage with the sealed degree inequality of hole hem structure 21, the leakproofness of structure has been guaranteed.
Exemplarily, fluoroplastics orifice plate 2 still includes be used for with the fixed knot who sets up of fluoroplastics orifice plate 23, and be located the hole with fold a structure 22 is turned over to ripple between the fixed knot constructs 23, fold a structure 22 and be used for buffering fluoroplastics heat exchange tube 1 is heated the stress concentration that deformation leads to.
Illustratively, the corrugated turnover structure 22 includes, but is not limited to, a zigzag and spiral structure to release stress concentration caused by pulling of the fluoroplastic heat exchange tube 1 due to thermal expansion of the fluoroplastic pore plate 2 through deformation.
In one embodiment, as shown in fig. 1, after the fluoroplastic heat exchange tube 1 is heated, the hole-containing flanging structure 21 and the heat exchange tube flanging 3 move downward together, the fixing structure 23 is used for fixing the fluoroplastic pore plate 2 to prevent the fluoroplastic pore plate 2 from moving downward integrally, and at this time, the corrugated flanging structure 22 is driven to move downward, so that stress generated by thermal expansion and vibration of the fluoroplastic heat exchange tube 1 on the inside of the fluoroplastic pore plate 2 is eliminated through deformation, and the fluoroplastic pore plate 2 is prevented from cracking due to excessive stress.
Illustratively, the fixing structure 23 is clamped by the side flanges 4 and the lower outlet flange 5, as shown in fig. 1.
In one embodiment, the side flange 4 is located above the fluoroplastic orifice plate 2 and contacts with the cold smoke, and in order to avoid corrosion, the side flange 4 is covered with a fluoroplastic lining plate 41, or only the side contacting with the cold smoke is covered with a fluoroplastic lining plate. The fluoroplastic material includes, but is not limited to, Polytetrafluoroethylene (PTFE) or a PTFE-modified plastic, such as fusible Polytetrafluoroethylene (PFA).
In one embodiment, the lower outlet flange 5 is located below the fluoroplastic orifice plate 2 and contacts with the hot flue gas after heat exchange, and in order to avoid corrosion, the lower outlet flange 5 is covered with an anticorrosive coating 51, or only the side contacting with the flue gas after temperature reduction is covered with an anticorrosive coating. The anti-corrosion coating includes, but is not limited to, anti-corrosion paint or glass flake anti-corrosion coating.
According to the utility model provides a flue gas heat exchanger for msw incineration power plant makes hole hem structure and fluoroplastics heat exchange tube firmly cramp through the heat exchange tube turn-ups, has realized the fixed of fluoroplastics heat exchange tube with the fluoroplastics orifice plate, has avoided the flue gas to leak, has guaranteed the leakproofness of structure.
The present invention has been described in terms of the above embodiments, but it is to be understood that the above embodiments are for purposes of illustration and description only and are not intended to limit the invention to the described embodiments. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that many more modifications and variations are possible in light of the teaching of the present invention and are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. A flue gas heat exchanger for a waste incineration power plant, comprising:
the fluoroplastic heat exchange tube is internally provided with hot flue gas;
the fluoroplastic pore plate comprises a plurality of pores, the fluoroplastic heat exchange tubes are arranged in the pores, and the fluoroplastic pore plate further comprises a pore flanging structure which at least partially wraps the fluoroplastic heat exchange tubes;
the heat exchange tube flanging is wrapped on the outer side of the hole flanging structure so as to seal the fluoroplastic heat exchange tube and the fluoroplastic pore plate.
2. The flue gas heat exchanger according to claim 1, wherein the fluoroplastic orifice plate further comprises a fixing structure for fixedly arranging the fluoroplastic orifice plate.
3. The flue gas heat exchanger according to claim 2, wherein the fluoroplastic pore plate further comprises a corrugated folding structure, and the corrugated folding structure is located between the hole and the fixing structure and is used for buffering stress concentration in the fluoroplastic pore plate caused by thermal deformation of the fluoroplastic heat exchange tube.
4. The flue gas heat exchanger according to claim 3, wherein the fluoroplastic orifice plate extends horizontally, and the hole flanging structure extends perpendicularly to the extending direction of the fluoroplastic orifice plate.
5. The flue gas heat exchanger according to claim 4, wherein the heat exchange tube flanges are arranged at the lower port of the fluoroplastic heat exchange tube.
6. The flue gas heat exchanger according to claim 5, wherein the cold flue gas flows above the fluoroplastic orifice plate to exchange heat with the hot flue gas in the fluoroplastic heat exchange tube, and the hot flue gas after heat exchange is discharged from the lower port of the fluoroplastic heat exchange tube to below the fluoroplastic orifice plate.
7. The flue gas heat exchanger according to claim 1, wherein the fluoroplastic heat exchange tubes and the fluoroplastic orifice plates are made of a fluoroplastic material comprising polytetrafluoroethylene or a polytetrafluoroethylene-modified plastic.
8. The flue gas heat exchanger of claim 6 further comprising side flanges and a lower outlet flange, wherein the securing structure is clamped by the side flanges and the lower outlet flange.
9. The flue gas heat exchanger according to claim 8, wherein the side flanges are positioned above the fluoroplastic orifice plate, the side flanges are covered with a fluoroplastic lining plate, the lower outlet flange is positioned below the fluoroplastic orifice plate, and the lower outlet flange is covered with an anticorrosive coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022983391.7U CN214892717U (en) | 2020-12-10 | 2020-12-10 | Flue gas heat exchanger for waste incineration power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022983391.7U CN214892717U (en) | 2020-12-10 | 2020-12-10 | Flue gas heat exchanger for waste incineration power plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214892717U true CN214892717U (en) | 2021-11-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022983391.7U Active CN214892717U (en) | 2020-12-10 | 2020-12-10 | Flue gas heat exchanger for waste incineration power plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214892717U (en) |
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2020
- 2020-12-10 CN CN202022983391.7U patent/CN214892717U/en active Active
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