Liquefied petroleum gas (LPG) and liquefied natural gas (LNG) dual-fuel medium air temperature gasifier

Abstract

The utility model discloses an LPG (Liquefied Petroleum Gas) and LNG (Liquefied Natural Gas) dual-fuel medium air temperature gasifier which is characterized in that an LPG storage tank is connected with the liquid inlet end of a first pipeline through a third pipeline, an LNG storage tank is connected with the liquid inlet end of the first pipeline through a fourth pipeline, and the liquid outlet end of the first pipeline is connected with a liquid inlet of a gasification part; a liquid inlet end and a liquid outlet end of the second pipeline are respectively connected with the first pipeline, the first pressure reducing valve is arranged on the second pipeline, a first valve is arranged between the first pressure reducing valve and a liquid inlet of the second pipeline, and a second valve is arranged between the first pipeline and the liquid inlet end and the liquid outlet end of the second pipeline; the gasification working principle of liquefied petroleum gas and liquefied natural gas is considered, the occupied area of equipment is small, and the medium universality is high.

Description

Technical Field

[0001] The utility model relates to the technical field of gasifiers, in particular to an air-temperature gasifier of LPG and LNG dual-fuel medium. Background Art

[0002] A vaporizer is a device used to heat liquid gas into gas. Simply put, liquid gas is heated and vaporized by a vaporizer and then becomes gaseous gas. The heating can be indirect (steam heating vaporizer, hot water bath vaporizer, natural ventilation air bath vaporizer, forced ventilation vaporizer, electric heating vaporizer, solid heat conduction vaporizer or heat transfer fluid) or direct (hot gas or submerged combustion).

[0003] LNG (liquefied natural gas) and LPG (liquefied petroleum gas) are two commonly used fuels. The prices of LNG and LPG vary in different regions and seasons. Especially in winter, due to the shortage of gas sources, the price of LNG rises significantly and will far exceed that of LPG. Therefore, using LPG in winter has great advantages. However, most of the gasifiers in the existing technology can only adapt to the gasification of one of the fuels, LNG and LPG. Enterprises need to be equipped with two sets of gasification equipment at the same time. Equipping two sets of gasification equipment separately will not only increase the cost, but also increase the floor space, which is not conducive to operation.

[0004] In view of this, there is an urgent need for an LPG and LNG dual-fuel medium air-temperature gasifier. Summary of the invention

[0005] In view of the problems existing in the prior art, the utility model solves the problems with the following technical structure.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] An LPG and LNG dual-fuel medium air temperature gasifier, comprising: an LPG storage tank, an LNG storage tank, a first pipeline, a second pipeline, a first pressure reducing valve, a first valve, a second valve, a third pipeline, a fourth pipeline and a gasification part;

[0008] The LPG storage tank is connected to the liquid inlet end of the first pipeline through a third pipeline, the LNG storage tank is connected to the liquid inlet end of the first pipeline through a fourth pipeline, and the liquid outlet end of the first pipeline is connected to the liquid inlet of the gasification part;

[0009] The liquid inlet and the liquid outlet of the second pipeline are respectively connected to different positions of the first pipeline, the first pressure reducing valve is arranged on the second pipeline, a first valve is arranged between the first pressure reducing valve and the liquid inlet of the second pipeline, a second valve is arranged between the liquid inlet and the liquid outlet of the first pipeline, and the gasification part is used to gasify the liquid from the first pipeline.

[0010] A further feature is that

[0011] The third pipeline is provided with a third valve.

[0012] The fourth pipeline is provided with a fourth valve.

[0013] The gasification section includes a gasification section, a temperature rising section and an air outlet pipe, the liquid inlet of the gasification section is connected to the liquid outlet end of the first pipeline, the outlet of the gasification section is connected to the inlet of the temperature rising section, and the air outlet pipe is connected to the air outlet of the temperature rising section.

[0014] The gasification section includes a plurality of first heat exchange tubes arranged in parallel.

[0015] The temperature rising section includes a plurality of second heat exchange tubes arranged in series.

[0016] The air outlet pipe is provided with a second pressure reducing valve.

[0017] The first heat exchange tube ring side is provided with a first heat exchange fin.

[0018] The second heat exchange tube ring side is provided with second heat exchange fins.

[0019] A fifth valve is arranged between the first pressure reducing valve and the liquid outlet of the second pipeline.

[0020] The above structure of the utility model can achieve the following beneficial effects:

[0021] LPG storage tanks are used to store liquefied petroleum gas, while LNG storage tanks are used to store liquefied natural gas. When the cost of liquefied petroleum gas is low, LPG storage tanks are used, the second valve is closed, and the first valve is opened, so that the liquefied petroleum gas is reduced in pressure through the first pressure reducing valve, and then enters the first pipeline. The reduced-pressure liquefied petroleum gas enters the gasification section for gasification. When the cost of using liquefied natural gas is low, LNG storage tanks are used, the second valve is opened, and the first valve is closed, and the liquefied natural gas in the LNG storage tank enters the gasification section through the first pipeline for gasification. In this way, the gasification work of liquefied petroleum gas and liquefied natural gas is taken into account, the equipment occupies a small area, is easy to use, and has low production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of this embodiment.

[0023] In the figure: 1. LPG storage tank; 2. LNG storage tank; 3. first pipeline; 4. second pipeline; 5. first pressure reducing valve; 6. first valve; 7. second valve; 8. third pipeline; 9. fourth pipeline; 10. third valve; 11. fourth valve; 12. outlet pipe; 13. first heat exchange tube; 14. second heat exchange tube; 15. second pressure reducing valve; 16. fifth valve. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution 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 is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0025] It should be noted that the terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, apparatus, product or equipment comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or equipment.

[0026] The following is combined with Figure 1 This application is described in further detail.

[0027] refer to Figure 1The illustrated embodiment of an air-temperature gasifier for LPG and LNG dual-fuel media comprises: an LPG storage tank 1, an LNG storage tank 2, a first pipeline 3, a second pipeline 4, a first pressure reducing valve 5, a first valve 6, a second valve 7, a third pipeline 8, a fourth pipeline 9 and a gasification part; the LPG storage tank 1 is connected to the liquid inlet end of the first pipeline 3 through the third pipeline 8, the LNG storage tank 2 is connected to the liquid inlet end of the first pipeline 3 through the fourth pipeline 9, and the liquid outlet end of the first pipeline 3 is connected to the liquid inlet of the gasification part; the liquid inlet end and the liquid outlet end of the second pipeline 4 are respectively connected to different positions of the first pipeline 3, the first pressure reducing valve 5 is arranged on the second pipeline 4, the first valve 6 is arranged between the first pressure reducing valve 5 and the liquid inlet of the second pipeline 4, and the first pipeline 3 is provided with a first valve 6 between the liquid inlet end and the liquid outlet end of the second pipeline 4. The second valve 7 and the gasification part are used to gasify the liquid from the first pipeline 3. In this way, the LPG storage tank 1 is used to store liquefied petroleum gas, and the LNG storage tank 2 is used to store liquefied natural gas. When the cost of liquefied petroleum gas is low, the LPG storage tank 1 is used, the second valve 7 is closed, and the first valve 6 is opened, so that the liquefied petroleum gas is reduced in pressure through the first pressure reducing valve 5, and then enters the first pipeline 3. The reduced-pressure liquefied petroleum gas enters the gasification part for gasification. When the cost of using liquefied natural gas is low, the LNG storage tank 2 is used, the second valve 7 is opened, and the first valve 6 is closed, and the liquefied natural gas in the LNG storage tank 2 enters the gasification part through the first pipeline 3 for gasification. In this way, the gasification work of liquefied petroleum gas and liquefied natural gas is taken into account, the equipment occupies a small area, is easy to use, and has a low production cost.

[0028] refer to Figure 1 As shown, for ease of use, a third valve 10 is provided on the third pipeline 8 and a fourth valve 11 is provided on the fourth pipeline 9, so as to prevent the liquefied petroleum gas from flowing back into the LNG storage tank 2 when the liquefied petroleum gas is gasified, or to prevent the liquefied natural gas from flowing back into the LPG storage tank 1 when the liquefied natural gas is gasified.

[0029] refer to Figure 1 As shown, the gasification section includes a gasification section, a temperature rising section and an outlet pipe 12. The liquid inlet of the gasification section is connected to the liquid outlet end of the first pipeline 3, the outlet of the gasification section is connected to the inlet of the temperature rising section, and the outlet pipe 12 is connected to the outlet of the temperature rising section. In this way, the gasification section is used to convert the low-temperature liquid from the first pipeline 3 into gas, the temperature rising section heats the low-temperature gas from the gasification section, and finally discharges it from the outlet pipe 12, and in order to further reduce the pressure of the exhaust gas, a second pressure reducing valve 15 is arranged on the outlet pipe 12.

[0030] refer to Figure 1 As shown, in order to improve the gasification efficiency of the cryogenic liquid, the gasification section includes a plurality of first heat exchange tubes 13 arranged in parallel, and a first heat exchange fin is arranged on the ring side of the first heat exchange tube 13. In this way, the plurality of first heat exchange tubes 13 are arranged in parallel to improve the gasification efficiency.

[0031] refer to Figure 1 As shown, in order to extend the heat exchange time of the gas, the temperature rising section includes a plurality of second heat exchange tubes 14 arranged in series, and a second heat exchange fin is arranged on the ring side of the second heat exchange tube 14. In this way, the low-temperature gas entering the temperature rising section undergoes heat exchange in the plurality of second heat exchange tubes 14 and is finally discharged from the outlet pipe 12.

[0032] As a further optimization, in order to prevent liquefied natural gas from flowing back into the first pressure reducing valve 5 when using liquefied natural gas, a fifth valve 16 is provided between the first pressure reducing valve 5 and the liquid outlet of the second pipeline 4. When using liquefied natural gas, the fifth valve 16 is closed.

[0033] In summary, LPG storage tank 1 is used to store liquefied petroleum gas, and LNG storage tank 2 is used to store liquefied natural gas. When the cost of liquefied petroleum gas is low, LPG storage tank 1 is used, the second valve 7 is closed, and the first valve 6 is opened, so that the liquefied petroleum gas is reduced in pressure through the first pressure reducing valve 5, and then enters the first pipeline 3. The reduced-pressure liquefied petroleum gas enters the gasification part for gasification. When the cost of using liquefied natural gas is low, LNG storage tank 2 is used, the second valve 7 is opened, and the first valve 6 is closed, and the liquefied natural gas in the LNG storage tank 2 enters the gasification part through the first pipeline 3 for gasification. In this way, the gasification work of liquefied petroleum gas and liquefied natural gas is taken into account, the equipment occupies a small area, is easy to use, and has low production cost.

[0034] The above are only preferred embodiments of the present application, and the present invention is not limited to the above embodiments. It is understood that other improvements and changes directly derived or associated by those skilled in the art without departing from the spirit and concept of the present invention should be considered to be included in the protection scope of the present invention.

Claims

1. An LPG and LNG dual fuel medium air temperature gasifier, characterized in that: include: An LPG storage tank (1), an LNG storage tank (2), a first pipeline (3), a second pipeline (4), a first pressure reducing valve (5), a first valve (6), a second valve (7), a third pipeline (8), a fourth pipeline (9), and a gasification unit; The LPG storage tank (1) is connected to the liquid inlet end of the first pipeline (3) via a third pipeline (8), the LNG storage tank (2) is connected to the liquid inlet end of the first pipeline (3) via a fourth pipeline (9), and the liquid outlet end of the first pipeline (3) is connected to the liquid inlet of the gasification part; The liquid inlet end and the liquid outlet end of the second pipeline (4) are respectively connected to different positions of the first pipeline (3); the first pressure reducing valve (5) is arranged on the second pipeline (4); a first valve (6) is arranged between the first pressure reducing valve (5) and the liquid inlet of the second pipeline (4); a second valve (7) is arranged between the liquid inlet end and the liquid outlet end of the first pipeline (3); and the gasification part is used to gasify the liquid from the first pipeline (3).

2. According to claim 1, an LPG and LNG dual fuel medium air temperature gasifier is characterized in that: The third pipeline (8) is provided with a third valve (10).

3. According to claim 1, the LPG and LNG dual fuel medium air temperature gasifier is characterized in that: The fourth pipeline (9) is provided with a fourth valve (11).

4. According to claim 1, the LPG and LNG dual fuel medium air temperature gasifier is characterized in that: The gasification section comprises a gasification section, a temperature rising section and an air outlet pipe (12); the liquid inlet of the gasification section is connected to the liquid outlet end of the first pipeline (3); the outlet of the gasification section is connected to the inlet of the temperature rising section; and the air outlet pipe (12) is connected to the air outlet of the temperature rising section.

5. The LPG and LNG dual fuel medium air temperature gasifier according to claim 4, characterized in that: The gasification section comprises a plurality of first heat exchange tubes (13) arranged in parallel.

6. The LPG and LNG dual fuel medium air temperature gasifier according to claim 4, characterized in that: The temperature rising section comprises a plurality of second heat exchange tubes (14) arranged in series.

7. The LPG and LNG dual fuel medium air temperature gasifier according to claim 4, characterized in that: The air outlet pipe (12) is provided with a second pressure reducing valve (15).

8. The LPG and LNG dual fuel medium air temperature gasifier according to claim 5, characterized in that: A first heat exchange fin is arranged on the ring side of the first heat exchange tube (13).

9. The LPG and LNG dual fuel medium air temperature gasifier according to claim 6, characterized in that: Second heat exchange fins are arranged on the ring side of the second heat exchange tube (14).

10. The LPG and LNG dual fuel medium air temperature gasifier according to claim 1, characterized in that: A fifth valve (16) is provided between the first pressure reducing valve (5) and the liquid outlet of the second pipeline (4).

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