Multifunctional liquefied natural gas gasification and reheating heat exchanger

Abstract

The utility model relates to the technical field of heat exchange devices, in particular to a multifunctional liquefied natural gas gasification and reheating heat exchanger which comprises a base, and the top of the base is fixedly connected with a liquid inlet pipe, a liquid outlet pipe, a gas inlet pipe and a gas outlet pipe. Longitudinal tooth finned tubes are fixedly connected and communicated between the liquid inlet tube and the liquid outlet tube and between the air inlet tube and the air outlet tube. The protection device comprises two mounting plates, the longitudinal tooth finned tubes are fixedly connected to the surfaces of the mounting plates, and the protection device can effectively wrap fins of the longitudinal tooth finned tubes and does not affect a protection structure of airflow circulation, so that dust can be separated from the fins of the longitudinal tooth finned tubes; therefore, the airflow in contact with the fins of the longitudinal-tooth finned tube is always kept clean, the probability of dust accumulation on the surface of the longitudinal-tooth finned tube is effectively reduced, and the heat exchange efficiency of the longitudinal-tooth finned tube is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchange devices, in particular to a multifunctional liquefied natural gas gasification and reheating heat exchanger. Background Art

[0002] A liquefied natural gas (LNG) vaporization and reheating heat exchanger is a heat exchange device specifically designed for LNG vaporization and reheating. It heats LNG from a cryogenic liquid to a room-temperature gaseous state while simultaneously recovering and utilizing the cold energy released during the LNG vaporization process. In recent years, with the urgent need for energy conservation and emission reduction, the compact and efficient longitudinal toothed fin-and-tube heat exchanger has gained increasing attention.

[0003] As the compactness of the longitudinal toothed fin-tube heat exchanger increases, the channel for fluid flow on the fin side continues to decrease, and the flow resistance increases significantly. The increase in flow resistance makes it easy for eddy current stagnation zones to form on the leeward side of the fin tube, causing large amounts of local dust accumulation, seriously affecting the heat transfer efficiency of the fin-tube heat exchanger and the safe and efficient operation of the heat exchanger.

[0004] Therefore, a multifunctional liquefied natural gas gasification reheating heat exchanger is proposed to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide a multifunctional liquefied natural gas gasification and reheating heat exchanger in order to solve the above problems, thereby improving the problem that the existing liquefied natural gas gasification and reheating heat exchanger is prone to dust accumulation and affects the heat transfer efficiency of the fin tube heat exchanger.

[0006] The utility model achieves the above-mentioned object through the following technical solutions: a multifunctional liquefied natural gas gasification and reheating heat exchanger, comprising: a base, a liquid inlet pipe, a liquid outlet pipe, an air inlet pipe, and an air outlet pipe fixedly connected to the top of the base, the liquid inlet pipe and the liquid outlet pipe, and the air inlet pipe and the air outlet pipe are fixedly connected and communicated with longitudinal tooth finned tubes;

[0007] A protective device includes two mounting plates, the longitudinal finned tubes are fixedly connected to the surfaces of the mounting plates, an annular filter is slidably connected between the two mounting plates, the longitudinal teeth of the longitudinal finned tubes are arranged on the inner side of the annular filter, and the protective device can effectively wrap the fins of the longitudinal finned tubes without affecting the protective structure of airflow, which can separate dust from the fins of the longitudinal finned tubes, so that the airflow in contact with the fins of the longitudinal finned tubes always remains clean, effectively reducing the probability of dust accumulation on the surface of the longitudinal finned tubes, so as to ensure the heat exchange efficiency of the longitudinal finned tubes.

[0008] Preferably, the inner side transmission connection of the annular filter is provided with four transmission shafts, and the two ends of the transmission shaft are rotatably connected to the two mounting plates respectively, which can support the annular filter and prevent the annular filter from contacting the longitudinal tooth fin tube.

[0009] Preferably, a scraper is fixedly connected between the two mounting plates, and the scraper contacts the annular filter on the side facing the annular filter. The staff only needs to actively drive the annular filter, and the scraper can scrape off the dust adhering to the surface of the annular filter, so that the annular filter always remains clean.

[0010] Preferably, the angle between the scraper and the annular filter is forty-five degrees, which can guide the scraped dust away from the annular filter and prevent the dust from concentrating on the surface of the scraper.

[0011] Preferably, one end of one of the transmission shafts passes through the outside of the mounting plate, which makes it easier for workers to drive the annular filter.

[0012] Preferably, an explosion-proof motor is fixedly connected to the surface of the mounting plate, and the end of the output shaft of the explosion-proof motor passes through the mounting plate and is connected to one of the transmission shafts, which can drive the annular filter screen electrically, reducing the burden on staff to clean the annular filter screen.

[0013] Preferably, a belt is fixedly connected to the inner side of the annular filter, and the inner side of the belt is transmission-connected to the drive shaft; the number of the belts is not less than two; a pulley is fixedly connected to the surface of the drive shaft, and the inner side of the belt is transmission-connected to the surface of the pulley, which can improve the stability of the explosion-proof motor-driven annular filter and prevent the annular filter from slipping.

[0014] Preferably, the protective device also includes two sealing rings, which are fixedly connected between the two mounting plates, and the two ends of the annular filter are respectively arranged inside the two sealing rings, which can prevent dust from falling to the junction between the annular filter and the mounting plate, so as to improve the cleanliness of the operation of the longitudinal tooth fin tube fins.

[0015] The beneficial effects of the utility model are:

[0016] 1. The protective device can effectively wrap the fins of the longitudinal tooth fin tube without affecting the airflow. This can separate the dust from the fins of the longitudinal tooth fin tube, so that the airflow in contact with the fins of the longitudinal tooth fin tube always remains clean, effectively reducing the probability of dust accumulation on the surface of the longitudinal tooth fin tube, thereby ensuring the heat exchange efficiency of the longitudinal tooth fin tube;

[0017] 2. Through the coordinated use of the scraper and the explosion-proof motor, when the staff needs to clean the dust on the surface of the annular filter, the explosion-proof motor can actively drive the annular filter to circulate through the scraper. At this time, the scraper can scrape off the dust adhering to the surface of the annular filter, so that the annular filter always remains clean. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of the utility model;

[0019] Figure 2 This is a schematic diagram of the arrangement of the longitudinal tooth finned tubes in the present invention;

[0020] Figure 3 It is a cross-sectional schematic diagram of the utility model;

[0021] Figure 4 This is a schematic diagram of the explosion of the protective device in the present utility model.

[0022] In the figure: 1. Base; 2. Liquid inlet pipe; 3. Protective device; 31. Mounting plate; 32. Annular filter; 33. Drive shaft; 34. Scraper; 35. Explosion-proof motor; 36. Belt; 37. Pulley; 38. Sealing ring; 4. Liquid outlet pipe; 5. Air inlet pipe; 6. Air outlet pipe; 7. Longitudinal tooth finned tube. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] When implementing: Figure 1-4 As shown, a multifunctional liquefied natural gas gasification and reheating heat exchanger includes: a base 1 and a protective device 3. The top of the base 1 is fixedly connected to a liquid inlet pipe 2, a liquid outlet pipe 4, an air inlet pipe 5, and an air outlet pipe 6. The liquid inlet pipe 2 and the liquid outlet pipe 4, as well as the air inlet pipe 5 and the air outlet pipe 6, are fixedly connected and communicated with longitudinal tooth finned tubes 7. One end of one portion of the longitudinal tooth finned tubes 7 is connected to the liquid inlet pipe 2 and the other end is connected to the liquid outlet pipe 4. One end of another portion of the longitudinal tooth finned tubes 7 is connected to the air inlet pipe 5 and the other end is connected to the air outlet pipe 6.

[0025] The longitudinal tooth finned tube 7 includes a pressure-bearing tube, the interior of which is provided with a heat exchange tube connected to the corresponding liquid inlet pipe 2 or liquid outlet pipe 4 or air inlet pipe 5 or air outlet pipe 6. The surface of the pressure-bearing tube is provided with radial fins. The pressure-bearing tube, fins and guide fins are an integral unit, which is formed by extruding an aluminum rod in one step through a special extruder.

[0026] When the device is in use, the low-temperature liquid first enters the heat-conducting pipe corresponding to the liquid inlet pipe 2, and then flows out through the liquid outlet pipe 4. The normal-temperature gas enters the heat-conducting pipe corresponding to the air inlet pipe 5, and then flows out through the air outlet pipe 6. At the same time, during the flow of the low-temperature liquid inside the heat-conducting pipe, the fins absorb the heat from the external environment and transfer it to the low-temperature fluid in the pipe, so that the fluid in the pipe absorbs heat and is transported to the user pipeline after it reaches room temperature.

[0027] like Figure 3 and Figure 4 As shown, the protective device 3 includes two mounting plates 31, the longitudinal tooth finned tube 7 is fixedly connected to the surface of the mounting plate 31, and the annular filter 32 is slidably connected between the two mounting plates 31. The longitudinal tooth portion of the longitudinal tooth finned tube 7 is arranged on the inner side of the annular filter 32; the inner side of the annular filter 32 is connected to the transmission shaft 33 in number. The annular filter 32 is a flexible filter. The annular filter 32 is in the shape of a rectangular cylinder under the support of the four transmission shafts 33. The upper and lower ends of the annular filter 32 are respectively in sliding contact with the corresponding mounting plates 31. The outer periphery of the transmission shaft 33 is in frictional contact with the inner periphery of the annular filter 32. When the transmission shaft 33 rotates, it can drive the annular filter 32 by friction. The net 32 ​​rotates along the axis of the annular filter 32, and the two ends of the transmission shaft 33 are respectively rotatably connected to the two mounting plates 31; one end of one of the transmission shafts 33 passes through the outside of the mounting plate 31; the protective device 3 also includes two sealing rings 38, which are respectively fixedly connected to the opposite ends of the two mounting plates 31, and the two ends of the annular filter 32 are respectively arranged inside the two sealing rings 38, and the two ends of the outer periphery of the annular filter 32 are respectively in sliding contact with the inner periphery of the corresponding sealing rings 38. The annular filter 32 partially overlaps with the sealing ring 38, thereby increasing the sealing effect between the annular filter 32 and the mounting plate 31 and reducing the dust from entering the annular filter 32 from the two ends of the annular filter 32.

[0028] A scraper 34 is fixedly connected between the two mounting plates 31, and the scraper 34 contacts the annular filter 32 on one side facing the annular filter 32; the angle between the scraper 34 and the annular filter 32 is forty-five degrees; an explosion-proof motor 35 is fixedly connected to the surface of the mounting plate 31, and the end of the output shaft of the explosion-proof motor 35 passes through the mounting plate 31 and is transmission-connected to one of the transmission shafts 33. In this embodiment, the output shaft of the explosion-proof motor 35 is fixedly connected to the upper end of the corresponding transmission shaft 33; a belt 36 is fixedly connected to the inner side of the annular filter 32, and the belt 36 is fixedly connected to the inner side of the annular filter 32. The inner side of the belt 36 is connected to the transmission shaft 33; the number of belts 36 is not less than two, which increases the stability of the annular filter 32 driven by the transmission shaft 33; the surface of the transmission shaft 33 is fixedly connected to the pulley 37, and the inner side of the belt 36 is connected to the surface of the pulley 37. The belt 36 is a synchronous belt, and the pulley 37 is a synchronous wheel. They are coaxially arranged with the corresponding transmission shaft 33, and the synchronous belt and the synchronous wheel are engaged with each other. Through the cooperation of the belt 36 and the pulley 37, the rotation of the annular filter 32 driven by the transmission shaft 33 is more stable;

[0029] When the staff needs to clean the dust on the surface of the annular filter 32, the staff only needs to manually control the explosion-proof motor 35 to operate, and the explosion-proof motor 35 drives the transmission shaft 33 connected to it to rotate, and the transmission shaft 33 drives the pulley 37 to rotate, and the pulley 37 drives the belt 36 to transmit, and the belt 36 drives the annular filter 32 to rotate actively. At this time, the scraper 34 can scrape off the dust adhering to the surface of the annular filter 32, so that the annular filter 32 is always kept clean.

[0030] When the present invention is in use, during the process of external airflow flowing toward the fins of the longitudinal toothed finned tube 7, the two mounting plates 31 cooperate to limit the airflow to only be able to contact the fins of the longitudinal toothed finned tube 7 through the space between the two mounting plates 31. At this time, the two mounting plates 31 and the annular filter 32 together form a protective structure that can effectively wrap the fins of the longitudinal toothed finned tube 7 without affecting the circulation of airflow. During this process, the annular filter 32 can filter out dust entrained in the passing airflow, so that the airflow in contact with the fins of the longitudinal toothed finned tube 7 is always kept clean, effectively reducing the probability of dust accumulation on the surface of the longitudinal toothed finned tube 7, so as to ensure the heat exchange efficiency of the longitudinal toothed finned tube 7.

[0031] It should be noted that the explosion-proof motor 35 in the above description is a device with relatively mature application of existing technology. The specific model can be selected according to actual needs. At the same time, the explosion-proof motor 35 can be powered by a built-in power supply or by AC power. The specific power supply method is selected according to the situation and will not be elaborated here.

[0032] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A multifunctional liquefied natural gas gasification reheating heat exchanger, characterized in that: include: A base (1), wherein the top of the base (1) is fixedly connected with a liquid inlet pipe (2), a liquid outlet pipe (4), an air inlet pipe (5) and an air outlet pipe (6); the liquid inlet pipe (2) and the liquid outlet pipe (4) and the air inlet pipe (5) and the air outlet pipe (6) are fixedly connected and communicated with a longitudinal tooth finned tube (7); A protective device (3) includes two mounting plates (31), the longitudinal tooth finned tube (7) is fixedly connected to the surface of the mounting plates (31), an annular filter screen (32) is slidably connected between the two mounting plates (31), and the longitudinal tooth portion of the longitudinal tooth finned tube (7) is arranged on the inner side of the annular filter screen (32).

2. The multifunctional liquefied natural gas gasification reheating heat exchanger according to claim 1, characterized in that: The inner side of the annular filter (32) is connected to four transmission shafts (33), and both ends of the transmission shafts (33) are respectively connected to the two mounting plates (31) in rotation.

3. The multifunctional liquefied natural gas gasification reheating heat exchanger according to claim 1, characterized in that: A scraper (34) is fixedly connected between the two mounting plates (31), and the scraper (34) contacts the annular filter (32) on one side facing the annular filter (32).

4. The multifunctional liquefied natural gas gasification reheating heat exchanger according to claim 3, characterized in that: The included angle between the scraper (34) and the annular filter (32) is forty-five degrees.

5. The multifunctional liquefied natural gas gasification reheating heat exchanger according to claim 2, characterized in that: One end of one of the transmission shafts (33) passes through the outside of the mounting plate (31).

6. The multifunctional liquefied natural gas gasification reheating heat exchanger according to claim 5, characterized in that: An explosion-proof motor (35) is fixedly connected to the surface of the mounting plate (31), and the end of the output shaft of the explosion-proof motor (35) passes through the mounting plate (31) and is in transmission connection with one of the transmission shafts (33).

7. The multifunctional liquefied natural gas gasification reheating heat exchanger according to claim 2, characterized in that: The inner side of the annular filter (32) is fixedly connected to a belt (36), and the inner side of the belt (36) is transmission-connected to the transmission shaft (33).

8. The multifunctional liquefied natural gas gasification reheating heat exchanger according to claim 7, characterized in that: The number of the belts (36) is no less than two.

9. The multifunctional liquefied natural gas gasification reheating heat exchanger according to claim 8, characterized in that: The surface of the transmission shaft (33) is fixedly connected with a pulley (37), and the inner side of the belt (36) is transmission-connected to the surface of the pulley (37).

10. The multifunctional liquefied natural gas gasification reheating heat exchanger according to claim 1, characterized in that: The protective device (3) further comprises two sealing rings (38), wherein the sealing rings (38) are respectively fixedly connected to the opposite ends of the two mounting plates (31), and the two ends of the annular filter (32) are respectively arranged inside the two sealing rings (38).

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