A water bath vaporizer with a high-efficiency heat exchange structure

Abstract

This application relates to the field of gas supply and application, and discloses a water bath vaporizer with a high-efficiency heat exchange structure. It includes a heat exchange shell for the water bath vaporizer, with a heat exchange chamber and a heating chamber formed on the inner side of the shell. Two support frames are fixedly installed inside the heat exchange chamber, and heat exchange pipes are fixedly installed on the top of each support frame. A circulating pump is fixedly installed on the bottom inner wall of the heating chamber, and a flow-limiting pipe is fixedly installed on the bottom inner wall of the heating chamber. A flow-limiting mechanism is provided inside the flow-limiting pipe. This application has the following advantages and effects: it can control the flow rate and volume of the returning liquid, allowing the liquid level in the heat exchange chamber to rise, thereby submerging the upper heat exchange pipe and achieving dual-pipe heat exchange; alternatively, by lowering the liquid level, only the lower heat exchange pipe can be heated in a water bath, reducing energy consumption and increasing the practicality and environmental friendliness of the equipment.

Description

Technical Field

[0001] This application relates to the field of gas supply and application technology, and in particular to a water bath vaporizer with a high-efficiency heat exchange structure. Background Technology

[0002] For boilers that use natural gas as fuel, the water bath vaporizer is one of the key pieces of equipment in the gas supply system. It is responsible for converting liquid natural gas into gaseous natural gas and precisely controlling the temperature and flow rate of the gas to provide a stable and reliable gas supply for the boiler to meet the needs of boiler combustion.

[0003] In existing technologies, when using water bath vaporizers to heat liquefied natural gas, each vaporizer is often equipped with only one heat exchange pipe. This results in low heat exchange efficiency, significant heat loss, and considerable energy waste.

[0004] Therefore, we propose a water bath vaporizer with a high-efficiency heat exchange structure to solve the above problems. Utility Model Content

[0005] To address the problems of low heat exchange efficiency and energy waste, this application provides a water bath vaporizer with a high-efficiency heat exchange structure.

[0006] The above-mentioned technical objective of this application is achieved through the following technical solution: a water bath vaporizer with a high-efficiency heat exchange structure, comprising a heat exchange shell for the water bath vaporizer, wherein a heat exchange chamber and a heating chamber are provided on the inner side of the heat exchange shell, two support frames are fixedly installed on the inner side of the heat exchange chamber, and heat exchange pipes are fixedly installed on the top of the two support frames, with both ends of the two heat exchange pipes extending out of the heat exchange shell; a circulation pump is fixedly installed on the bottom inner wall of the heating chamber, and a flow-limiting pipe is fixedly installed on the bottom inner wall of the heating chamber, with a flow-limiting mechanism provided on the inner side of the flow-limiting pipe.

[0007] By adopting the above technical solution, a heating groove is provided on one side of the heat exchange shell, and a graphene electric heating plate is fixedly installed on the inner side of the heating groove.

[0008] Optionally, the liquid in the heating chamber can be heated.

[0009] By adopting the above technical solution, LNG heads and NG heads are fixedly installed at both ends of the two heat exchange pipes, respectively.

[0010] Optionally, it facilitates the input of liquefied natural gas and the output of natural gas.

[0011] By adopting the above technical solution, a circulation cover and a water filling cover are detachably installed on the top of the heat exchange shell. A condenser tube is fixedly inserted through the circulation cover, and the other end of the condenser tube is fixedly inserted through the water filling cover. A water filling head is provided on the water filling cover.

[0012] Optional, it facilitates the circulation of water vapor and reduces liquid consumption.

[0013] By adopting the above technical solution, a circulation pipe is fixedly installed on the output end of the circulation pump, one end of the circulation pipe extends into the heat exchange chamber, and a drain pipe is fixedly installed on the end of the circulation pipe that extends into the heat exchange chamber. Multiple drain holes are opened on the surface of the drain pipe.

[0014] Optionally, it facilitates the introduction of heated liquid into the heat exchange chamber.

[0015] By adopting the above technical solution, a return pipe is fixedly installed at the other end of the drain pipe, and the other end of the return pipe extends into the heating chamber. The end of the return pipe extending into the heating chamber is connected to the inlet of the flow-limiting pipe.

[0016] Optionally, it facilitates the control of the flow rate and velocity of the return liquid through a flow-limiting pipe.

[0017] By adopting the above technical solution, the flow limiting mechanism includes a blocking ball, a reinforcing ring, a linkage shaft, a linkage housing, and a drive assembly. The blocking ball is rotatably installed on the inner side of the flow limiting pipe. A flow hole is opened on one side of the blocking ball. A reinforcing ring is fixedly installed on the inner side of the flow hole. A linkage shaft is fixedly installed on the top of the blocking ball. A linkage housing is fixedly installed on the top of the flow limiting pipe. A drive assembly is provided on the inner side of the linkage housing.

[0018] Optionally, a reinforcing ring can increase the structural stability of the blocking ball.

[0019] By adopting the above technical solution, the drive assembly includes a worm gear, a worm, a transmission shaft, and a servo motor. A worm gear is rotatably mounted on the bottom inner wall of the linkage housing, and the worm gear is fixedly connected to the top end of the linkage shaft. A worm is rotatably mounted on one inner wall of the linkage housing, and the worm meshes with the worm gear. One side of the linkage housing is fixedly connected to one inner wall of the heating chamber. A transmission shaft is fixedly mounted on the other end of the worm, and the transmission shaft is rotatably mounted inside the linkage housing. A motor slot is provided on the inner side of the heat exchange housing, and a servo motor is fixedly mounted on one inner wall of the motor slot. The output shaft of the servo motor is fixedly connected to the transmission shaft.

[0020] Optionally, a servo motor can be used to drive the transmission shaft to rotate.

[0021] This application includes at least one of the following beneficial technical effects:

[0022] This application utilizes a flow-limiting mechanism consisting of a blocking ball and a flow-limiting pipe to control the flow rate and volume of the returning liquid. Reducing the return flow rate can raise the liquid level in the heat exchange chamber, thereby submerging the upper heat exchange pipe and achieving dual-pipe heat exchange. When the demand for natural gas is low, the return flow rate can be increased to lower the liquid level, thus allowing only the lower heat exchange pipe to be heated by water bath, reducing energy consumption and increasing the practicality and environmental friendliness of the equipment. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of this embodiment.

[0024] Figure 2 This is a three-dimensional cross-sectional view of the embodiment.

[0025] Figure 3 This is a three-dimensional structural breakdown diagram of the heat exchange pipe in this embodiment.

[0026] Figure 4 This is a three-dimensional structural diagram of the current limiting mechanism in this embodiment.

[0027] Figure 5 This is a three-dimensional structural breakdown diagram of the current limiting mechanism in this embodiment.

[0028] In the diagram, 1. Heat exchange shell; 2. Heat exchange chamber; 3. Heating chamber; 4. Graphene heating plate; 5. Support frame; 6. Heat exchange pipe; 7. LNG head; 8. NG head; 9. Circulation pump; 10. Circulation pipe; 11. Drain pipe; 12. Return pipe; 13. Flow limiting pipe; 14. Blocking ball; 15. Reinforcing ring; 16. Linkage shaft; 17. Linkage shell; 18. Worm gear; 19. Worm; 20. Drive shaft; 21. Servo motor; 22. Circulation cover; 23. Condensate pipe; 24. Water filling cover. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0030] This application discloses a water bath vaporizer with a high-efficiency heat exchange structure, including a heat exchange shell 1 for the water bath vaporizer. The heat exchange shell 1 has a heat exchange chamber 2 and a heating chamber 3 on its inner side. Two support frames 5 are fixedly installed on the inner side of the heat exchange chamber 2. Heat exchange pipes 6 are fixedly installed on the top of the two support frames 5. Both ends of the two heat exchange pipes 6 extend out of the heat exchange shell 1. A circulation pump 9 is fixedly installed on the bottom inner wall of the heating chamber 3. A flow-limiting pipe 13 is fixedly installed on the bottom inner wall of the heating chamber 3. A flow-limiting mechanism is provided on the inner side of the flow-limiting pipe 13.

[0031] Specifically, a heating groove is provided on one side of the heat exchange shell 1, and a graphene electric heating plate 4 is fixedly installed on the inner side of the heating groove, which can heat the liquid in the heating chamber 3.

[0032] Specifically, LNG heads 7 and NG heads 8 are fixedly installed at both ends of the two heat exchange pipes 6 to facilitate the input of liquefied natural gas and the output of natural gas.

[0033] Specifically, the top of the heat exchange shell 1 is detachably equipped with a circulation cover 22 and a water filling cover 24. A condenser tube 23 is fixedly inserted through the circulation cover 22, and the other end of the condenser tube 23 is fixedly inserted through the water filling cover 24. The water filling cover 24 is equipped with a water filling head to facilitate the circulation of water vapor and reduce liquid consumption.

[0034] Specifically, a circulation pipe 10 is fixedly installed on the output end of the circulation pump 9. One end of the circulation pipe 10 extends into the heat exchange chamber 2. A drain pipe 11 is fixedly installed on the end of the circulation pipe 10 that extends into the heat exchange chamber 2. Multiple drain holes are provided on the surface of the drain pipe 11 to facilitate the input of heated liquid into the heat exchange chamber 2.

[0035] Specifically, a return pipe 12 is fixedly installed at the other end of the drain pipe 11. The other end of the return pipe 12 extends into the heating chamber 3. One end of the return pipe 12 extending into the heating chamber 3 is connected to the inlet of the flow-limiting pipe 13, so as to control the flow rate and velocity of the return liquid through the flow-limiting pipe 13.

[0036] Specifically, the flow limiting mechanism includes a blocking ball 14, a reinforcing ring 15, a linkage shaft 16, a linkage housing 17, and a drive assembly. The blocking ball 14 is rotatably mounted on the inner side of the flow limiting pipe 13. A flow hole is opened on one side of the blocking ball 14. The reinforcing ring 15 is fixedly mounted on the inner side of the flow hole. The linkage shaft 16 is fixedly mounted on the top of the blocking ball 14. The linkage housing 17 is fixedly mounted on the top of the flow limiting pipe 13. The drive assembly is provided on the inner side of the linkage housing 17. The reinforcing ring 15 can increase the structural stability of the blocking ball 14.

[0037] Specifically, the drive assembly includes a worm gear 18, a worm 19, a transmission shaft 20, and a servo motor 21. The worm gear 18 is rotatably mounted on the bottom inner wall of the linkage housing 17, and the worm gear 18 is fixedly connected to the top end of the linkage shaft 16. The worm 19 is rotatably mounted on one inner wall of the linkage housing 17, and the worm 19 meshes with the worm gear 18. One side of the linkage housing 17 is fixedly connected to one inner wall of the heating chamber 3. The other end of the worm 19 is fixedly mounted with the transmission shaft 20, which is rotatably mounted inside the linkage housing 17. A motor slot is provided inside the heat exchange housing 1, and a servo motor 21 is fixedly mounted on one inner wall of the motor slot. The output shaft of the servo motor 21 is fixedly connected to the transmission shaft 20, and the servo motor 21 drives the transmission shaft 20 to rotate.

[0038] Working Principle: When supplying natural gas to the boiler, the operator first activates the graphene heating plate 4, which heats the liquid in the heating chamber 3. Simultaneously, the circulation pump 9 is activated, circulating the heated liquid. The liquid enters the circulation pipe 10 through the pump and then reaches the drain pipe 11. The heated liquid is discharged through multiple drain holes on the drain pipe 11, filling the heat exchange chamber 2. Then, the liquefied natural gas pipeline is connected to the corresponding LNG head 7, allowing the liquefied natural gas to enter the heat exchange pipe 6. The liquid level in the heat exchange chamber 2 rises, submerging the lower heat exchange pipe 6 and heating it. Simultaneously, the liquid returns to the heating chamber 3 through the return pipe 12, completing the circulation. When the boiler has a high demand for natural gas, the operator... The servo motor 21 is started, which drives the transmission shaft 20 to rotate. The rotation of the transmission shaft 20 drives the worm gear 19 to rotate, which in turn drives the worm wheel 18 to rotate. The rotation of the worm wheel 18 drives the linkage shaft 16 to rotate, which in turn drives the blocking ball 14 to rotate. The flow rate and velocity of the liquid in the return pipe 12 are controlled by the opening and closing degree of the flow orifice on the surface of the blocking ball 14. When the flow orifice is opened to a smaller extent, the return flow is reduced, thereby raising the liquid level in the heat exchange chamber 2 and submerging the upper heat exchange pipe 6, realizing dual-pipe heat exchange. At the same time, the water vapor generated during heat exchange rises and enters the condenser pipe 23 through the circulation cover 22 to condense into liquid. Then, it flows back into the heating chamber 3 through the water filling cover 24. When the heat exchange pipe 6 heats the liquefied natural gas, the liquefied natural gas is vaporized and then transported to the boiler through the NG head 8.

[0039] With the above structure, this application provides a method to control the flow rate and volume of the refluxed liquid. Reducing the reflux flow rate can raise the liquid level in the heat exchange chamber 2, thereby submerging the upper heat exchange pipe 6 and realizing dual-pipe heat exchange. At the same time, when the demand for natural gas is low, the reflux flow rate can be increased to lower the liquid level, thereby only water bath heating of the lower heat exchange pipe 6, reducing energy consumption and increasing the practicality and environmental friendliness of the equipment.

[0040] In this embodiment, to achieve efficient heat exchange and solve the problems of low heat exchange efficiency and severe heat loss caused by a single heat exchange pipe in the prior art, the system is equipped with two heat exchange pipes 6 arranged vertically, installed on the top of the support frame 5 respectively. During operation, the liquid level in the heat exchange chamber 2 is adjusted by controlling the flow rate of the return liquid, thereby selectively heating one or both heat exchange pipes. When the boiler gas demand is low, the servo motor 21 drives the worm gear 18 to rotate, which in turn drives the linkage shaft 16 to rotate, increasing the opening angle of the flow orifice on the blocking ball 14, increasing the liquid flow in the return pipe 12, thereby reducing the liquid level in the heat exchange chamber 2, so that only the lower heat exchange pipe 6 is submerged in liquid, and only the lower heat exchange pipe 6 is used for heat exchange at this time; conversely, when the gas demand is high, the servo motor 21 adjusts in the opposite direction, reducing the opening angle of the flow orifice, reducing the return flow, increasing the liquid level in the heat exchange chamber 2, so that the upper heat exchange pipe 6 is also submerged in liquid, thereby realizing simultaneous heat exchange of both pipes and improving the overall heat exchange efficiency.

[0041] To ensure accurate control of liquid level changes, a liquid level sensor (not shown) is installed in the heat exchange chamber 2. Its signal output is connected to a controller (not shown). The controller automatically adjusts the speed and direction of the servo motor 21 according to the set liquid level threshold, thereby controlling the opening of the blocking ball 14. For example, in actual operation, when the liquid level sensor detects that the liquid level is lower than the bottom of the lower heat exchange pipe 6, the controller starts the servo motor 21 to gradually close the flow orifice until the liquid level rises back to the preset range; when the liquid level exceeds the top of the upper heat exchange pipe 6, the controller controls the servo motor 21 to gradually open the flow orifice to accelerate liquid backflow and prevent overflow.

[0042] Furthermore, to further improve heat exchange efficiency and reduce energy waste, the power of the graphene heating plate 4 can be dynamically adjusted based on temperature data fed back from the outlet temperature sensor of the circulating pump 9. The controller receives real-time temperature signals from the temperature sensor and compares them with the preset target temperature. It then uses a PID control algorithm to adjust the operating voltage of the graphene heating plate 4 to maintain it in optimal heating condition. For example, in a typical application scenario, the target heating temperature is set at 60℃. When the circulating water temperature is detected to be below 58℃, the controller increases the heating plate power to the maximum value of 1.5kW; when the temperature approaches 60℃, the power is gradually reduced to 0.8kW to maintain a constant temperature.

[0043] In actual operation, liquefied natural gas (LNG) enters heat exchange pipeline 6 through LNG head 7. It first passes through a preheating section before entering the main heat exchange zone. The preheating section is 30 cm long, and the main heat exchange zone is 1.2 m long. The pipeline is made of stainless steel with an outer diameter of 50 mm and a wall thickness of 3 mm. The flow velocity of the LNG in the pipeline is controlled between 0.5 and 1.0 m / s to ensure sufficient heat absorption and avoid supercooling and boiling. The vaporized natural gas is then output through NG head 8 and transported to the boiler combustion system.

[0044] To further reduce steam loss, the condenser tube 23 adopts a U-shaped structure design with a hydrophilic coating on its inner wall to enhance steam condensation. The condensate flows back to the water storage tank below the water inlet cover 24 by gravity and eventually returns to the heating chamber 3, forming a closed-loop circulation. Under normal operating conditions, the condensate volume is approximately 0.5L per hour, accounting for more than 80% of the total evaporation, significantly reducing the system's water replenishment frequency and energy consumption.

[0045] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A water bath vaporizer with high heat exchange structure, characterized in that, It includes a heat exchange shell (1) for a water bath vaporizer, wherein a heat exchange chamber (2) and a heating chamber (3) are provided on the inner side of the heat exchange shell (1), and two support frames (5) are fixedly installed on the inner side of the heat exchange chamber (2). Heat exchange pipes (6) are fixedly installed on the top of the two support frames (5), and both ends of the two heat exchange pipes (6) extend out of the heat exchange shell (1). A circulation pump (9) is fixedly installed on the bottom inner wall of the heating chamber (3), and a flow-limiting pipe (13) is fixedly installed on the bottom inner wall of the heating chamber (3). A flow-limiting mechanism is provided on the inner side of the flow-limiting pipe (13).

2. The water bath vaporizer with high heat exchange efficiency according to claim 1, characterized in that: A heating groove is provided on one side of the heat exchange shell (1), and a graphene electric heating plate (4) is fixedly installed on the inner side of the heating groove.

3. The water bath vaporizer with a high-efficiency heat exchange structure according to claim 1, characterized in that: An LNG head (7) and an NG head (8) are fixedly installed at both ends of the two heat exchange pipes (6).

4. The water bath vaporizer with a high-efficiency heat exchange structure according to claim 1, characterized in that: The top of the heat exchange shell (1) is detachably equipped with a circulation cover (22) and a water filling cover (24). A condenser tube (23) is fixedly inserted through the circulation cover (22), and the other end of the condenser tube (23) is fixedly inserted through the water filling cover (24). A water filling head is provided on the water filling cover (24).

5. The water bath vaporizer with a high-efficiency heat exchange structure according to claim 1, characterized in that: A circulation pipe (10) is fixedly installed on the output end of the circulation pump (9). One end of the circulation pipe (10) extends into the heat exchange chamber (2). A drain pipe (11) is fixedly installed on the end of the circulation pipe (10) that extends into the heat exchange chamber (2). Multiple drain holes are provided on the surface of the drain pipe (11).

6. The water bath vaporizer with a high-efficiency heat exchange structure according to claim 5, characterized in that: The other end of the drain pipe (11) is fixedly installed with a return pipe (12), the other end of the return pipe (12) extends into the heating chamber (3), and the end of the return pipe (12) extending into the heating chamber (3) is connected to the inlet of the flow limiting pipe (13).

7. A water bath vaporizer with a high-efficiency heat exchange structure according to claim 6, characterized in that: The flow limiting mechanism includes a blocking ball (14), a reinforcing ring (15), a linkage shaft (16), a linkage housing (17), and a drive assembly. The blocking ball (14) is rotatably installed on the inner side of the flow limiting pipe (13). A flow hole is opened on one side of the blocking ball (14). The reinforcing ring (15) is fixedly installed on the inner side of the flow hole. The linkage shaft (16) is fixedly installed on the top of the blocking ball (14). The linkage housing (17) is fixedly installed on the top of the flow limiting pipe (13). The drive assembly is provided on the inner side of the linkage housing (17).

8. The water bath vaporizer with a high-efficiency heat exchange structure according to claim 7, characterized in that: The drive assembly includes a worm gear (18), a worm (19), a transmission shaft (20), and a servo motor (21). The worm gear (18) is rotatably mounted on the bottom inner wall of the linkage housing (17). The worm gear (18) is fixedly connected to the top end of the linkage shaft (16). The worm (19) is rotatably mounted on one side inner wall of the linkage housing (17). The worm (19) meshes with the worm gear (18). One side of the linkage housing (17) is fixedly connected to one side inner wall of the heating chamber (3). The other end of the worm (19) is fixedly mounted with a transmission shaft (20). The transmission shaft (20) is rotatably mounted on the inner side of the linkage housing (17). A motor slot is provided on the inner side of the heat exchange housing (1). A servo motor (21) is fixedly mounted on one side inner wall of the motor slot. The output shaft of the servo motor (21) is fixedly connected to the transmission shaft (20).

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