Silicon carbide tubular air preheater

Abstract

The utility model relates to the technical field of air pre-heaters, and discloses a silicon carbide tubular air pre-heater which comprises a main body mechanism and an auxiliary mechanism, the auxiliary mechanism is located at the rear end of the main body mechanism, and the main body mechanism comprises an air pre-heater body, a placing hole and a silicon carbide heat exchange tube. The placing hole is fixedly formed in the lower end of the inner end of the air preheater body, and the silicon carbide heat exchange tube is movably mounted at the upper end of the placing hole; the main body mechanism further comprises a connecting plate, a limiting hole, a bolt, a temperature sensor and a temperature displayer, the connecting plate is movably installed at the upper end of the air preheater body, the limiting hole is fixedly formed in the lower end of the connecting plate, and the limiting hole is movably connected with the silicon carbide heat exchange pipe. According to the silicon carbide tubular air preheater, by installing the main body mechanism, subsequent disassembly and replacement of the silicon carbide heat exchange tubes are facilitated, the functionality is improved, the subsequent maintenance difficulty is reduced, the practicability is improved, and the use requirements of people are met conveniently.

Description

Technical Field

[0001] The utility model relates to the technical field of air preheaters, in particular to a silicon carbide tube-type air preheater. Background Art

[0002] The air preheater is a heating surface that preheats the flue gas in the tail flue of the boiler to a certain temperature through the internal heat sink. It is a device used to improve the heat exchange performance of the boiler and reduce energy consumption. Silicon carbide material has higher density, higher heat resistance and better corrosion resistance. At the same time, silicon carbide material is also highly stable and can remain stable under high temperature, high pressure and high intensity working environment. Therefore, it is widely used in the field of air heat exchangers.

[0003] The prior art patent document CN216244394U discloses a silicon carbide tubular air preheater. The utility model adopts a non-metallic silicon carbide heat exchange tube, inserts both ends of the silicon carbide heat exchange tube into the openings of the tube sheet, and then arranges a support plate and a rubber sealing ring in the gap between the silicon carbide heat exchange tube and the opening. After the sealing ring is installed in place, it protrudes from the outer surface of the tube sheet. The metal gland is pressed against the tube sheet and spot welded firmly. It has good sealing performance and is easy to install. It overcomes low-temperature acid leakage point corrosion. The equipment is light in weight, high in strength, small in flow resistance, not easy to accumulate dust, simple in structure, and easy to clean. It ensures that the equipment can operate efficiently for a long period of time and can further reduce the exhaust temperature and improve thermal efficiency. It has broad market prospects.

[0004] However, the prior art CN216244394U patent is not convenient for subsequent disassembly and replacement of the silicon carbide heat exchange tube, has low functionality, increases the difficulty of subsequent maintenance, has low practicality, and is not convenient for meeting people's usage needs. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] The utility model aims to provide a silicon carbide tube-type air preheater to solve the problem in the above-mentioned background technology that it is inconvenient to subsequently disassemble and replace the silicon carbide heat exchange tube.

[0007] (II) Technical solution

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a silicon carbide tube air preheater, comprising a main body and an auxiliary mechanism, wherein the auxiliary mechanism is located at the rear end of the main body, and the main body comprises an air preheater body, a placement hole and a silicon carbide heat exchange tube, wherein the placement hole is fixedly arranged at the lower end of the inner end of the air preheater body, and the silicon carbide heat exchange tube is movably installed at the upper end of the placement hole;

[0009] The main body structure also includes a connecting plate, a limiting hole, a bolt, a temperature sensor and a temperature display. The connecting plate is movably installed at the upper end of the air preheater body, the limiting hole is fixedly arranged at the lower end of the connecting plate, the limiting hole is movably connected to the silicon carbide heat exchange tube, the bolt is threadedly installed at the upper end of the connecting plate, the bolt extends to the inner end of the air preheater body, the temperature sensor is fixedly installed at the upper end of the left end of the inner end of the air preheater body, the temperature display is fixedly installed at the right end of the air preheater body, and the temperature display is electrically connected to the temperature sensor.

[0010] Preferably, the auxiliary mechanism includes a mounting frame, a mounting hole, a placement slot, an air inlet, a limit slot, a filter, a connecting block and an air outlet. The mounting frame is fixedly mounted on the air preheater body to facilitate the installation of the silicon carbide tube air preheater in a suitable position.

[0011] Preferably, the mounting hole is fixedly arranged at the front end of the mounting frame, and the placement groove is fixedly arranged at the rear end of the upper end of the air preheater body, so as to facilitate the installation and removal of the filter.

[0012] Preferably, the air inlet is fixedly arranged at the rear end of the air preheater body, the limit groove is fixedly arranged at the rear end of the inner end of the air preheater body, and the limit groove is located behind the placement hole, which is convenient for reinforcing the filter and improving the protection effect.

[0013] Preferably, the limiting groove is movably connected to the filter, and the filter is movably installed at the inner end of the limiting groove. The filter is located in front of the air inlet, which is convenient for filtering the high-temperature gas and preventing the high-temperature gas from carrying welding slag impurities and other items in the pipeline due to excessive airflow, thereby damaging the silicon carbide heat exchange tube.

[0014] Preferably, the connection block is fixedly mounted on the middle portion of the upper end of the filter, and the air outlet is fixedly arranged at the front end of the air preheater body, thereby improving practicality.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The silicon carbide tube air preheater is easy to disassemble and replace the silicon carbide heat exchange tube by installing the main body mechanism, which improves the functionality, reduces the difficulty of subsequent maintenance, improves the practicality, and is easy to meet people's use needs;

[0017] 2. The silicon carbide tube air preheater is easy to transmit the temperature information inside the air preheater body by installing the main body mechanism, so as to check the internal temperature change and avoid the large temperature difference between the inside and outside of the silicon carbide heat exchange tube and the uneven heat transfer and tube cracking;

[0018] 3. The silicon carbide tubular air preheater is installed with auxiliary mechanisms to facilitate filtering of high-temperature gas, thereby preventing excessive high-temperature gas flow from carrying welding slag impurities and other items in the pipeline, thereby causing damage to the silicon carbide heat exchange tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0020] Figure 2 The local structure diagram of the auxiliary mechanism of the utility model is shown in FIG. Figure 1 ;

[0021] Figure 3 It is a partial structural diagram of the main mechanism of the utility model;

[0022] Figure 4 The schematic diagram of the local structure of the auxiliary mechanism of the utility model is shown in FIG. Figure 2 .

[0023] In the figure: 1. Main mechanism; 101. Air preheater body; 102. Placement hole; 103. Silicon carbide heat exchange tube; 104. Connecting plate; 105. Limiting hole; 106. Bolt; 107. Temperature sensor; 108. Temperature display; 2. Auxiliary mechanism; 201. Mounting frame; 202. Mounting hole; 203. Placement slot; 204. Air inlet; 205. Limiting slot; 206. Filter; 207. Connecting block; 208. Air outlet. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1-Figure 4 The utility model provides a technical solution: a silicon carbide tube air preheater, comprising a main mechanism 1 and an auxiliary mechanism 2, the auxiliary mechanism 2 is located at the rear end of the main mechanism 1, the main mechanism 1 comprises an air preheater body 101, a placement hole 102 and a silicon carbide heat exchange tube 103, the placement hole 102 is fixedly arranged at the lower end of the inner end of the air preheater body 101, and the silicon carbide heat exchange tube 103 is movably installed at the upper end of the placement hole 102;

[0026] The main body mechanism 1 also includes a connecting plate 104, a limiting hole 105, a bolt 106, a temperature sensor 107 and a temperature display 108. The connecting plate 104 is movably mounted on the upper end of the air preheater body 101, the limiting hole 105 is fixedly arranged at the lower end of the connecting plate 104, the limiting hole 105 is movably connected to the silicon carbide heat exchange tube 103, the bolt 106 is threadedly mounted on the upper end of the connecting plate 104, the bolt 106 extends to the inner end of the air preheater body 101, the temperature sensor 107 is fixedly mounted on the upper end of the left end of the inner end of the air preheater body 101, the temperature display 108 is fixedly mounted on the right end of the air preheater body 101, and the temperature display 108 is electrically connected to the temperature sensor 107.

[0027] The auxiliary mechanism 2 includes a mounting frame 201, a mounting hole 202, a placement slot 203, an air inlet 204, a limiting slot 205, a filter 206, a connecting block 207 and an air outlet 208. The mounting frame 201 is fixedly mounted on the air preheater body 101, the mounting hole 202 is fixedly arranged at the front end of the mounting frame 201, the placement slot 203 is fixedly arranged at the rear end of the upper end of the air preheater body 101, the air inlet 204 is fixedly arranged at the rear end of the air preheater body 101, and the limiting slot 205 is fixedly arranged at the inner end of the air preheater body 101. At the rear end, the limit groove 205 is located behind the placement hole 102, the limit groove 205 is movably connected to the filter 206, the filter 206 is movably installed at the inner end of the limit groove 205, the filter 206 is located in front of the air inlet 204, the connection block 207 is fixedly installed in the middle of the upper end of the filter 206, and the air outlet 208 is fixedly set at the front end of the air preheater body 101. First, when using the silicon carbide tube air preheater, the staff installs the air preheater body 101 in a suitable position through the installation frame 201 and the installation hole 202, and the high-temperature gas The air enters the air preheater body 101 through the air inlet 204, and the filter 206 filters the gas to prevent the high-temperature gas from entering the air preheater body 101 and damaging the silicon carbide heat exchange tube 103 by carrying welding slag impurities and other items in the pipeline. The tube wall of the silicon carbide heat exchange tube 103 will absorb part of the heat energy, causing the internal temperature to rise, thereby heating the low-temperature gas outside the tube and raising its temperature. When the temperature of the tube wall of the silicon carbide heat exchange tube 103 and the gas outside the tube reaches equilibrium, the heat exchange is completed, and the temperature sensor 107 transmits the information to the heat exchanger 103. The temperature display 108 is used by the staff to check the internal temperature changes to avoid large temperature difference between the inside and outside of the silicon carbide heat exchange tube 103, uneven heat transfer and tube cracking. After long-term use, the bolts 106 are loosened to remove the connecting plate 104 and replace the silicon carbide heat exchange tube 103. The placement holes 102 and the limiting holes 105 respectively limit and fix the upper and lower ends of the silicon carbide heat exchange tube 103. The filter 206 can be taken out of the air preheater body 101 by pulling the connecting block 207, and the limiting groove 205 limits and reinforces the filter 206.

[0028] Working principle: First, when using the silicon carbide tubular air preheater, the staff installs the air preheater body 101 in a suitable position through the installation frame 201 and the installation hole 202. The high-temperature gas enters the air preheater body 101 through the air inlet 204. The filter 206 filters the gas to prevent the high-temperature gas from entering the air preheater body 101 due to excessive airflow and carrying welding slag impurities and other items in the pipeline, causing damage to the silicon carbide heat exchange tube 103. The wall of the silicon carbide heat exchange tube 103 will absorb part of the heat energy, causing the internal temperature to rise, thereby heating the low-temperature gas outside the tube and raising its temperature. When the wall of the silicon carbide heat exchange tube 103 and the tube After the outside gas temperature reaches equilibrium, the heat exchange is completed, and the temperature sensor 107 transmits the information to the temperature display 108. The staff checks the internal temperature changes through the temperature display 108 to avoid large temperature difference between the inside and outside of the silicon carbide heat exchange tube 103, uneven heat transfer and tube cracking. After long-term use, loosen the bolts 106 to remove the connecting plate 104 and replace the silicon carbide heat exchange tube 103. The placement hole 102 and the limit hole 105 respectively limit and fix the upper and lower ends of the silicon carbide heat exchange tube 103. The filter 206 can be taken out of the air preheater body 101 by pulling the connecting block 207, and the limit groove 205 limits and reinforces the filter 206.

[0029] Finally, it should be noted that the above content is only used to illustrate the technical solution of the utility model, rather than to limit the protection scope of the utility model. Simple modifications or equivalent substitutions of the technical solution of the utility model by ordinary technicians in this field do not deviate from the essence and scope of the technical solution of the utility model.

Claims

1. A silicon carbide tubular air preheater, comprising a main mechanism (1) and an auxiliary mechanism (2), characterized in that: The auxiliary mechanism (2) is located at the rear end of the main mechanism (1); the main mechanism (1) comprises an air preheater body (101), a placement hole (102) and a silicon carbide heat exchange tube (103); the placement hole (102) is fixedly arranged at the lower end of the inner end of the air preheater body (101); and the silicon carbide heat exchange tube (103) is movably installed at the upper end of the placement hole (102); The main body structure (1) further comprises a connecting plate (104), a limiting hole (105), a bolt (106), a temperature sensor (107) and a temperature display (108); the connecting plate (104) is movably mounted on the upper end of the air preheater body (101); the limiting hole (105) is fixedly arranged on the lower end of the connecting plate (104); the limiting hole (105) is movably connected to the silicon carbide heat exchange tube (103); the bolt (106) is threadedly mounted on the upper end of the connecting plate (104); the bolt (106) extends to the inner end of the air preheater body (101); the temperature sensor (107) is fixedly mounted on the upper end of the left end of the inner end of the air preheater body (101); the temperature display (108) is fixedly mounted on the right end of the air preheater body (101); and the temperature display (108) is electrically connected to the temperature sensor (107).

2. The silicon carbide tubular air preheater according to claim 1, characterized in that: The auxiliary mechanism (2) comprises a mounting frame (201), a mounting hole (202), a placement slot (203), an air inlet (204), a limit slot (205), a filter (206), a connection block (207) and an air outlet (208); the mounting frame (201) is fixedly mounted on the air preheater body (101).

3. The silicon carbide tubular air preheater according to claim 2, characterized in that: The mounting hole (202) is fixedly arranged at the front end of the mounting frame (201), and the placement groove (203) is fixedly arranged at the rear end of the upper end of the air preheater body (101).

4. The silicon carbide tubular air preheater according to claim 3, characterized in that: The air inlet (204) is fixedly arranged at the rear end of the air preheater body (101), and the limiting groove (205) is fixedly arranged at the rear end of the inner end of the air preheater body (101), and the limiting groove (205) is located behind the placement hole (102).

5. The silicon carbide tubular air preheater according to claim 4, characterized in that: The limiting groove (205) is movably connected to the filter screen (206), and the filter screen (206) is movably installed at the inner end of the limiting groove (205). The filter screen (206) is located in front of the air inlet (204).

6. The silicon carbide tubular air preheater according to claim 5, characterized in that: The connection block (207) is fixedly mounted at the middle of the upper end of the filter (206), and the air outlet (208) is fixedly arranged at the front end of the air preheater body (101).

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