Natural gas heating device

Abstract

The utility model discloses a natural gas heating device which comprises a tank body and a gas conveying pipeline, the gas conveying pipeline is arranged in the tank body and comprises a gas inlet pipe, a gas outlet pipe, a gas cavity and a plurality of coil pipes, and the gas cavity is conical. One ends of the gas inlet pipe and the gas outlet pipe are provided with gas cavities and are communicated with the narrow ends of the gas cavities, and the other ends of the gas inlet pipe and the gas outlet pipe are communicated with the liquefied natural gas storage tank and the natural gas pipeline. A plurality of coil pipes are arranged between the wide ends of the air cavity, the two ends of each coil pipe are communicated with the air inlet pipe and the air outlet pipe through the air cavity respectively, and a plurality of heating rods which are evenly arranged at intervals are arranged on the inner wall of the tank body in the circumferential direction. The device can uniformly heat the liquefied natural gas, so that heat is fully absorbed by the liquefied natural gas, and the gasification efficiency of the liquefied natural gas is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of natural gas equipment, in particular to a natural gas heating device. Background Art

[0002] Natural gas is mainly composed of methane, which is recognized as the cleanest fossil energy on earth. In order to facilitate the long-distance transportation of natural gas, it is necessary to convert natural gas into liquid natural gas (LNG for short), and then transport it to the natural gas gasification station by ship or tanker truck. LNG is heated at the gasification station and converted back into gaseous natural gas for use by thousands of households. Existing heating devices generally add heating rods to the bottom of the tank body, and then transfer heat to the LNG pipeline through the heat transfer medium, so that the LNG is heated and vaporized. In actual operation, this heating method makes the temperature of the heat transfer medium near the heating rod higher, while the temperature far away from the heating rod is lower, which is not sufficient for heating the LNG pipeline and the vaporization efficiency of LNG is poor. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a natural gas heating device.

[0004] The technical solution of the utility model is: a natural gas heating device, including a tank body and a gas pipeline, wherein the tank body is provided with a gas pipeline, and the gas pipeline includes an air inlet pipe, an air outlet pipe, an air cavity and a plurality of coils, and the air cavity is conical. An air cavity is provided at one end of the air inlet pipe and the air outlet pipe, and both are connected to the narrow end of the air cavity, and the other ends of the air inlet pipe and the air outlet pipe are connected to the liquefied natural gas storage tank and the natural gas pipeline respectively. A plurality of coils are provided between the wide ends of the air cavity, and the two ends of the plurality of coils are connected to the air inlet pipe and the air outlet pipe respectively through the air cavity. A plurality of evenly spaced heating rods are provided on the circumference of the inner wall of the tank body.

[0005] Furthermore, temperature gauges are provided on the air inlet pipe and the air outlet pipe.

[0006] Furthermore, an opening matching the air inlet pipe is provided on the top of the tank body, and one end of the air inlet pipe passes through the opening into the tank body and communicates with the air cavity.

[0007] Furthermore, a side opening cooperating with an air outlet pipe is provided on the side of the tank body, and the air outlet pipe passes through the side opening and is connected with a natural gas pipeline outside the tank body.

[0008] Furthermore, a sealing ring is provided between the inner wall of the side opening and the outer wall of the air outlet pipe.

[0009] Furthermore, the heating rod is provided with protruding fins.

[0010] Furthermore, the coiled tubes are all internally threaded tubes.

[0011] Furthermore, the outer wall of the tank body is provided with a heat-insulating layer.

[0012] Furthermore, a blade is provided at the bottom of the tank body, and the rotation center of the blade is connected to the output shaft of the motor outside the tank body.

[0013] Furthermore, the output shaft of the motor is connected to the blades through a magnetic coupling.

[0014] Compared with the prior art, the advantages of the utility model are: liquefied natural gas enters the air cavity through the air inlet pipe, the air cavity evenly disperses the liquefied natural gas, so that the natural gas is dispersed into each coil, and the use of multiple coils increases the contact area between the liquefied natural gas and the heat transfer medium in the tank body, which is conducive to the gasification process; the multiple heating rods on the inner wall of the tank body can evenly transfer heat to the coil through the heat transfer medium, so that the liquefied natural gas in the coil is fully heated and gasified. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is an overall schematic diagram of the utility model;

[0017] Figure 2 It is a cross-sectional schematic diagram of the tank body of the utility model;

[0018] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0019] Figure 4 This is a schematic diagram of the gas transmission pipeline of the utility model.

[0020] Among them: 1. tank body; 2. gas pipeline; 11. motor; 12. liquid level alarm; 13. opening; 14. heating rod; 15. side port; 16. insulation layer; 111. blades; 112. magnetic coupling; 141. fins; 151. sealing ring; 21. air inlet pipe; 22. air outlet pipe; 23. air cavity; 24. coil; 25. thermometer. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of the utility model.

[0022] The specific implementation of the utility model will be described below in conjunction with the accompanying drawings:

[0023] like Figures 1 to 4 As shown, a natural gas heating device comprises a tank body 1 and a gas pipeline 2. The tank body 1 is provided with a gas pipeline 2, and the gas pipeline 2 comprises an air inlet pipe 21, an air outlet pipe 22, an air cavity 23 and a plurality of coils 24. The air cavity 23 is conical. The air inlet pipe 21 and the air outlet pipe 22 are both provided with an air cavity 23 at one end, and are both connected with the narrow end of the air cavity 23. The top of the tank body 1 is provided with an opening 13 matching the air inlet pipe 21, and one end of the air inlet pipe 21 passes through the opening 13 to enter the tank body 1 and communicate with the air cavity 23; the side of the tank body 1 is provided with a side port 15 matching the air outlet pipe 22, and the air outlet pipe 22 passes through the side port 15 to communicate with the natural gas pipeline outside the tank body 1. A sealing ring 151 is provided between the inner wall of the side port 15 and the outer wall of the air outlet pipe 22. The sealing ring 151 prevents the heat transfer medium in the tank body 1 from flowing out from the gap between the air outlet pipe 22 and the side port 15.

[0024] The other ends of the air inlet pipe 21 and the air outlet pipe 22 are connected to the liquefied natural gas storage tank and the natural gas pipeline respectively. A plurality of coils 24 are arranged between the wide ends of the air cavity 23, and the two ends of the plurality of coils 24 are connected to the air inlet pipe 21 and the air outlet pipe 22 respectively through the air cavity 23. The coils 24 are all internally threaded tubes, and the heat exchange area between the liquefied natural gas in the coils 24 and the heat transfer medium can be increased by the internally threaded tubes, which is beneficial to the gasification of natural gas. A plurality of evenly spaced heating rods 14 are arranged on the circumference of the inner wall of the tank body 1. The tank body 1 is filled with a heat transfer medium, generally liquid water at room temperature. The heating rod 14 is provided with protruding fins 141, which increase the contact area between the heating rod 14 and the heat transfer medium, so that the heat of the heating rod 14 can be quickly and evenly transferred to the heat transfer medium.

[0025] The heating rod 14 heats the heat transfer medium uniformly, and the heat is transferred to the coil 24 through the heat transfer medium to gasify the liquefied natural gas in the coil 24. The liquefied natural gas enters the interior of the tank body 1 from the air inlet pipe 21, and then the gaseous natural gas is discharged from the air outlet pipe 22. Multiple coils 24 increase the heat exchange area between the liquefied natural gas and the heat transfer medium, and improve the efficiency of the liquefied natural gas gasification. The air inlet pipe 21 and the air outlet pipe 22 are both provided with a thermometer 25, through which the temperature change of the natural gas entering and leaving the tank body 1 can be seen.

[0026] The outer wall of the tank body 1 is provided with an insulation layer 16, which can prevent heat from being lost through the side wall of the tank body 1, making full use of heat and saving energy. The bottom of the tank body 1 is provided with a blade 111, and the rotation center of the blade 111 is connected to the output shaft of the motor 11 outside the tank body 1 through a magnetic coupling 112. The motor 11 drives the blade 111 to rotate, and the blade 111 stirs the heat transfer medium in the tank body 1, so that the heat is evenly distributed inside the tank body 1, preventing uneven temperature in the tank body 1 and improving the heat transfer efficiency. The magnetic coupling 112 can maximize the transmission effect of the motor 11 and prevent the tank body 1 from leaking.

[0027] The working principle of the specific embodiment of the utility model is as follows: liquefied natural gas enters the tank body 1 from the air inlet pipe 21, and enters each coil 24 evenly through the dispersion effect of the air cavity 23. Multiple heating rods 14 heat the heat transfer medium inside the tank body 1 in a circumferential direction, so that the heat is evenly transferred to the coil 24 through the heat transfer medium. The liquefied natural gas is heated and vaporized in the coil 24, and finally flows into the natural gas pipeline outside the tank body 1 through the air outlet pipe 22.

[0028] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an element centered thereon. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an element centered thereon. The terms "upper", "lower", "left", "right", "front", "rear" and similar expressions used herein are for illustrative purposes only.

[0029] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A natural gas heating device, characterized in that: The invention comprises a tank body (1) and a gas pipeline (2), wherein the tank body (1) is provided with the gas pipeline (2), wherein the gas pipeline (2) comprises an air inlet pipe (21), an air outlet pipe (22), an air cavity (23) and a plurality of coils (24), wherein the air cavity (23) is conical; one end of each of the air inlet pipe (21) and the air outlet pipe (22) is provided with the air cavity (23), and both are connected to the narrow end of the air cavity (23); the other ends of the air inlet pipe (21) and the air outlet pipe (22) are respectively connected to a liquefied natural gas storage tank and a natural gas pipeline; a plurality of coils (24) are provided between the wide ends of the air cavity (23), and the two ends of the plurality of coils (24) are respectively connected to the air inlet pipe (21) and the air outlet pipe (22) through the air cavity (23); and a plurality of heating rods (14) are provided on the circumference of the inner wall of the tank body (1) at even intervals.

2. The natural gas heating device according to claim 1, characterized in that: The air inlet pipe (21) and the air outlet pipe (22) are both provided with a temperature gauge (25).

3. The natural gas heating device according to claim 1, characterized in that: The top of the tank body (1) is provided with an opening (13) that matches the air intake pipe (21); one end of the air intake pipe (21) passes through the opening (13) and enters the tank body (1) to communicate with the air cavity (23).

4. The natural gas heating device according to claim 1, characterized in that: The side of the tank body (1) is provided with a side opening (15) cooperating with the gas outlet pipe (22), and the gas outlet pipe (22) passes through the side opening (15) and is connected to a natural gas pipeline outside the tank body (1).

5. The natural gas heating device according to claim 4, characterized in that: A sealing ring (151) is provided between the inner wall of the side opening (15) and the outer wall of the air outlet pipe (22).

6. The natural gas heating device according to claim 1, characterized in that: The heating rod (14) is provided with protruding fins (141).

7. The natural gas heating device according to claim 1, characterized in that: The coiled pipes (24) are all internally threaded pipes.

8. The natural gas heating device according to claim 1, characterized in that: The outer wall of the tank body (1) is provided with a heat-insulating layer (16).

9. The natural gas heating device according to claim 1, characterized in that: A blade (111) is provided at the bottom of the tank body (1), and the rotation center of the blade (111) is connected to the output shaft of the motor (11) outside the tank body (1).

10. The natural gas heating device according to claim 9, characterized in that: The output shaft of the motor (11) is connected to the blade (111) via a magnetic coupling (112).

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