Heat exchange plate of low-temperature economizer of thermal power plant
By designing the heat exchange plate of the low-temperature economizer, using symmetrical steel plates and a raised structure, the problem of easy blockage in the flue gas flow channel was solved, achieving smooth flue gas flow and efficient heat exchange.
Patent Information
- Application Number
- CN202422893782.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-27
- Publication Date
- 2025-11-07
- Estimated Expiration
- 2034-11-27
AI Technical Summary
The heat exchange plates in H-type finned economizers are prone to dust accumulation and blockage in the flue gas flow channels, resulting in high flue gas flow resistance and affecting heat exchange efficiency.
A heat exchange plate for a low-temperature economizer in a thermal power plant is designed, which uses symmetrically arranged steel plates and strips. The steel plates have weld points and protrusions, and the protrusions are connected to form flue gas channels. A coating is applied to the surface of the steel plates to improve wear resistance and corrosion resistance.
It effectively reduces the flow resistance of flue gas, ensures smooth flow of flue gas, avoids dust adhesion, prevents flow channel blockage, and improves heat exchange efficiency and sealing performance.
Smart Images
Figure CN223525649U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to heat exchange plate for coal economizer technical field, especially relate to a low temperature coal economizer heat exchange plate of thermal power plant. BACKGROUND
[0002] The coal economizer is installed to the lower part of the boiler tail flue for recovering the waste heat of the exhaust fume, and the heating surface of the boiler feed water is heated into the saturated water under the pressure of the steam pocket, the heat of the high-temperature flue gas is absorbed, not only the exhaust fume temperature of the flue gas is reduced, the energy is saved, but also the efficiency is effectively improved.
[0003] The coal economizer is divided into the light pipe coal economizer and the finned tube coal economizer according to the structure, wherein the finned tube coal economizer is further divided into the H type finned tube coal economizer and the spiral finned tube coal economizer, and the H type finned tube coal economizer is a widely used coal economizer at present. SUMMARY
[0004] The utility model discloses a low temperature coal economizer heat exchange plate of thermal power plant, and solves the problems of the prior art.
[0005] In order to achieve the above object, the utility model provides the following scheme: the utility model provides a low temperature coal economizer heat exchange plate of thermal power plant, including the symmetrical steel sheet of setting, two sides of the steel sheet are fixedly connected with the long strip board respectively, two long strip boards on the same side of two steel sheets are fixedly connected, and the opposite side of two steel sheets is provided with a plurality of weld spots, a plurality of weld spots on two steel sheets are provided one by one, and the opposite two weld spots are fixedly connected.
[0006] Preferably, each steel sheet is in the shape of a trough.
[0007] Preferably, the long strip board is arranged on the long side of the steel sheet and is integrally formed with the steel sheet.
[0008] Preferably, a plurality of weld spots are evenly distributed on the steel sheet at equal intervals.
[0009] Preferably, the opposite side of two steel sheets is provided with a plating layer.
[0010] Preferably, two corresponding protrusions are spliced into a cavity.
[0011] Preferably, the cavities are connected in communication with each other.
[0012] The utility model discloses the following technical effects:
[0013] The utility model discloses a convex is set in the opposite side of two steel sheets, makes flue gas can flow along the outer surface of convex, has effectively reduced the resistance when flue gas flows, not only can make flue gas flow smoothly and quickly in flue gas flow channel, can also make the dust in the smoke dust not easy to adhere to the surface of steel sheet, has effectively avoided the blockage of flue gas flow channel. BRIEF DESCRIPTION OF DRAWINGS
[0014] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, the following will be briefly introduced the drawing needed to be used in the embodiment, obviously, the drawing in the following description only some embodiments of the utility model, for ordinary skilled person in the art, under the premise of not paying creative labor, still can obtain other drawings according to these drawings.
[0015] Fig. 1 It is the front view structural schematic diagram of the utility model;
[0016] Fig. 2 It is the side view structural schematic diagram of the utility model;
[0017] Fig. 3 It is the side view structural schematic diagram of single steel sheet of the utility model;
[0018] Wherein, 1, steel sheet;2, welding point;3, convex;4, long strip board;5, cavity. DETAILED DESCRIPTION
[0019] The technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model, obviously, the described embodiment only some embodiments of the utility model, not all the embodiments. Based on the embodiment in the utility model, all other embodiments obtained by ordinary skilled person in the art without making creative labor belong to the range of protection of the utility model.
[0020] In order to make the above purpose, features and advantages of the utility model more obvious and easy to understand, the following will be further detailed to the utility model in conjunction with the drawings and specific embodiment.
[0021] REFERENCE Figs. 1-3The utility model discloses a low temperature coal economizer heat exchange plate of thermal power plant, including the symmetrical steel sheet 1 of setting, the both sides of steel sheet 1 are fixedly connected with long strip board 4 respectively, two long strip boards 4 fixed connection are in the same side of two steel sheets 1, the opposite side of two steel sheets 1 is provided with a plurality of weld points 2 respectively, a plurality of weld points 2 on two steel sheets 1 are set up one by one correspondingly, fixedly connected between the opposite two weld points 2, a plurality of protrusions 3 are set up around every weld point 2, and the adjacent two protrusions 3 are connected.
[0022] The flue gas flow channel is formed between the two heat exchange plates, and the spacing between the two heat exchange plates is 8-80 mm
[0023] The steel sheet 1 is made of ND steel, and the length of each steel sheet 1 is 3-12 m, and the width is 0.5-1.4 m.
[0024] The protrusions 3 arranged on the opposite side of the two steel sheets 1 enable the flue gas to flow along the outer surface of the protrusions 3, effectively reducing the resistance when the flue gas flows, not only enabling the flue gas to flow smoothly and quickly in the flue gas flow channel, but also preventing the dust in the flue gas from adhering to the surface of the steel sheet 1, effectively avoiding the blockage of the flue gas flow channel.
[0025] In a further optimization, each steel sheet 1 is in the shape of a wave trough. The flue gas flows along the outer surface of the steel sheet 1, and the flue gas can flow along the wave trough shape of the steel sheet 1, not only increasing the heat exchange between the flue gas and water, but also effectively reducing the resistance when the flue gas flows.
[0026] In a further optimization, the long strip board 4 is arranged on the long side of the steel sheet 1 and is integrally formed with the steel sheet 1. The integrally formed long strip board 4 and steel sheet 1 do not have gaps therebetween, effectively improving the sealing performance.
[0027] In a further optimization, the plurality of weld points 2 are evenly distributed on the steel sheet 1 at equal intervals. The two corresponding weld points 2 are welded together, enabling the two steel sheets 1 to form a flow channel for the circulation of the refrigerant medium.
[0028] In a further optimization, the side of the two steel sheets 1 away from each other is provided with a plating layer. The plating layer is made of a ceramic coating, which can effectively improve the strength and compactness of the steel sheet 1, and has low porosity, good wear resistance, heat resistance, corrosion resistance, oxidation resistance, and electrical insulation.
[0029] In a further optimization, the two corresponding protrusions 3 are spliced to form a cavity 5.
[0030] In a further optimization, the adjacent cavities 5 are connected.
[0031] The refrigerant medium can be orderly exchanged with the flue gas by flowing in the cavities 5, and the area of the refrigerant medium and the flue gas can be increased by the cavities 5, so that the heat exchange efficiency is effectively improved.
[0032] The manufacturing process of the heat exchange plate is as follows:
[0033] After the two steel plates 1 are overlapped, the periphery of the two steel plates 1 is fully welded by laser, and a gap is reserved at the two short sides of the steel plate 1, laser spot welding is performed at a certain pitch on the side away from each other of the two steel plates 1, so that the side of the two steel plates 1 away from each other forms a welding spot 2, then the two steel plates 1 are pressed by a die casting mold, and high-pressure air is filled in the cavities 5 at the short side gaps, i.e. the short side of the two steel plates 1, so that the space in the two steel plates 1 is expanded along the welding spot 2, forming a plurality of cavities 5 for the circulation of the refrigerant medium (condensed water), then the side away from each other of the two steel plates 1 is sprayed with a plating layer, and the manufacturing of a heat exchange plate is completed, and the above process is repeated to continuously manufacture the heat exchange plate.
[0034] In the description of the present application, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the present application.
[0035] The above-described embodiments are only preferred modes of the present application, and do not limit the scope of the present application, and various modifications and improvements to the technical solutions of the present application made by those skilled in the art without departing from the design spirit of the present application shall fall within the protection scope of the present application.
Claims
1. A heat exchange plate for a low-temperature economizer of a thermal power plant, characterized in that: The utility model provides a steel sheet (1) is arranged symmetrically, two sides of steel sheet (1) are fixedly connected with long strip board (4) respectively, two long strip boards (4) on the same side of two steel sheets (1) are fixedly connected, the opposite side of two steel sheets (1) is provided with a plurality of weld points (2) respectively, a plurality of weld points (2) on two steel sheets (1) are correspondingly arranged, and the opposite two weld points (2) are fixedly connected, and a plurality of protrusions (3) are arranged around each weld point (2), and the adjacent two protrusions (3) are communicated.
2. The heat exchanger plate for a low-temperature economizer of a thermal power plant according to claim 1, characterized in that: Each steel sheet (1) is in the shape of a trough.
3. The heat exchanger plate of a low-temperature economizer of a thermal power plant according to claim 1, characterized in that: The long strip board (4) is arranged on the long side of the steel sheet (1) and is integrally formed with the steel sheet (1).
4. The heat exchanger plate of a low-temperature economizer of a thermal power plant according to claim 1, characterized in that: A plurality of weld points (2) are evenly distributed on the steel sheet (1) at equal intervals.
5. The heat exchanger plate of a low-temperature economizer of a thermal power plant according to claim 1, characterized in that: The side of the two steel sheets (1) away from each other is respectively provided with a plating layer.
6. The heat exchanger plate of a low-temperature economizer of a thermal power plant according to claim 1, characterized in that: The two corresponding protrusions (3) are spliced into a cavity (5).
7. The heat exchanger plate of a low-temperature economizer of a thermal power plant according to claim 6, characterized in that: The adjacent cavities (5) are communicated.