A box type LNG skid-mounted equipment pipeline layout system

Abstract

This utility model discloses a pipeline layout system for a box-type LNG skid-mounted equipment, including a pump skid, a booster vaporizer, an LNG storage tank, and a box body. The pump skid, booster vaporizer, and LNG storage tank are all housed within the box body, with the pump skid and booster vaporizer located on one side of the LNG storage tank. The booster vaporizer is U-shaped or U-shaped, surrounding the pump skid, with its opening facing the LNG storage tank. The booster vaporizer is a certain distance from the box wall and rests on the box body's bottom plate. In this utility model, the booster vaporizer uses a U-shaped structure arranged around the space surrounding the pump skid, maximizing the use of the box body's internal space, providing ample space for heat exchange with air, facilitating icing control, and simplifying vaporizer inspection and maintenance.

Description

Technical Field

[0001] This utility model relates to the field of pipeline layout for box-type LNG skid-mounted equipment. More specifically, this utility model relates to a pipeline layout system for box-type LNG skid-mounted equipment. Background Technology

[0002] With increasing environmental protection requirements and cost control, the sales volume of LNG heavy-duty trucks has been increasing year by year, leading to a steady increase in the number of LNG refueling stations in China. This has also placed higher demands on LNG skid-mounted equipment. Currently, LNG skid-mounted equipment can meet the unloading, refueling, and pressure regulation needs of conventional LNG refueling stations. There are two main approaches to the current equipment pipeline layout: one is to submerge the vaporizer at the bottom of the storage tank, providing ample space at the pump skid for easy operation and maintenance. However, this makes vaporizer maintenance or replacement difficult, and when unloading large volumes, the vaporizer is prone to freezing, which is inconvenient to handle and reduces vaporization efficiency. The other approach is to place the vaporizer next to the pump skid, which makes it easier to handle freezing. However, the space around the pump skid is cramped, making it difficult for personnel to enter and exit for operation and maintenance, and personnel are prone to contact with the vaporizer, which could lead to safety accidents. Utility Model Content

[0003] To achieve these objectives and other advantages according to the present invention, a preferred embodiment of the present invention provides a piping layout system for a box-type LNG skid-mounted equipment, including a pump skid, a booster vaporizer, an LNG storage tank, and a box body; wherein, The pump skid, the booster vaporizer, and the LNG storage tank are all housed within the container. The pump skid is connected to the booster vaporizer via a pipeline, and the booster vaporizer is connected to the LNG storage tank via a pipeline. The pump skid and the booster vaporizer are located on one side of the LNG storage tank. The booster vaporizer is U-shaped or U-shaped, encircling the pump skid, with its opening facing the LNG storage tank. The booster vaporizer is a certain distance from the container wall and rests on the bottom plate of the container.

[0004] Preferably, the booster vaporizer is equipped with a walking platform on top for workers to move around and operate.

[0005] Preferably, it also includes an EAG vaporizer, which is mounted on top of the housing.

[0006] Preferably, it also includes an explosion-proof junction box and an instrument cabinet, which are located between the booster vaporizer and the box wall.

[0007] Preferably, it also includes a pump pool, which is connected to the LNG storage tank via a return gas pipeline. The return gas pipeline is inclined, with the end connected to the LNG storage tank higher than the end connected to the pump pool, and the return gas pipeline is straight without bends.

[0008] Preferably, the height of the LNG storage tank is greater than its transverse cross-sectional length and transverse cross-sectional width.

[0009] Preferably, the container is further provided with an unloading port, and a blower is installed at the unloading port.

[0010] This utility model has at least the following beneficial effects: The booster vaporizer in this utility model adopts a U-shaped structure and is arranged around the space around the pump skid, which maximizes the use of the internal space of the box, has a large space for heat exchange with air, and facilitates icing treatment and vaporizer inspection and maintenance; the booster vaporizer adopts a bottom-mounted design to minimize the height of the vaporizer, and a personnel walking platform is built on the top of the vaporizer, providing a large maintenance space around the pump skid, facilitating personnel access and operation.

[0011] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0012] Figure 1 This is a top view of the pipeline layout system of the LNG skid-mounted equipment of this utility model.

[0013] Figure 2 This is a side view of the pipeline layout system of the LNG skid-mounted equipment of this utility model.

[0014] Figure 3 This is a schematic diagram showing the connection between the pump pool and the LNG storage tank in this utility model. Detailed Implementation

[0015] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0016] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious modifications will occur to those skilled in the art. The basic principles of the present invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0017] Those skilled in the art should understand that in the disclosure of this utility model, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as a limitation of this utility model.

[0018] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0019] like Figure 1-3 As shown, a preferred embodiment of this utility model provides a piping layout system for a box-type LNG skid-mounted equipment, including a pump skid 1, a booster vaporizer 2, an LNG storage tank 3, and a box body 4; wherein, the pump skid is connected to the booster vaporizer via a pipeline, and the booster vaporizer is connected to the LNG storage tank via a pipeline, the pump skid 1, the booster vaporizer 2, and the LNG storage tank 3 are all arranged inside the box body 4, and the pump skid 1 and the booster vaporizer 2 are located on one side of the LNG storage tank 3, the booster vaporizer 2 is U-shaped or U-shaped, surrounds the pump skid 1 inside, and the opening of the booster vaporizer 2 faces the LNG storage tank 3, the booster vaporizer 2 is a certain distance away from the box wall of the box body 4, and the booster vaporizer 2 is placed on the bottom plate of the box body 4.

[0020] In the above technical solution, the booster vaporizer 2 is a device that heats and vaporizes LNG and increases its pressure; the LNG storage tank 3 is a sealed container for storing cryogenic LNG. The pump skid is connected to the booster vaporizer via pipelines, and the booster vaporizer is connected to the LNG storage tank via pipelines. It vaporizes the liquefied natural gas (LNG) in the storage tank before pressurizing it. The LNG storage tank 3, as the core storage device, occupies the main space inside the container 4, while the pump skid 1 and booster vaporizer 2 are centrally located on one side of the LNG storage tank 3. The booster vaporizer 2 adopts a U-shaped or U-shaped structure design, with its curved portion forming a surrounding space that perfectly encloses the pump skid 1, and the opening end of the booster vaporizer faces the LNG storage tank. This layout maximizes the use of the internal space of the container 4, provides ample space for heat exchange with air, facilitates icing handling, and allows for subsequent maintenance and repair of the booster vaporizer.

[0021] In another technical solution, a walking platform 5 is installed on the top of the booster vaporizer 2 for workers to walk around and work.

[0022] In the above technical solution, the walking platform 5 is made of carbon steel or stainless steel, and its size matches the top area of ​​the booster vaporizer 2. Guardrails are installed along the platform's edges to prevent workers from accidentally falling. In addition, steps or ladders are provided on the platform for safe access for workers. Because the platform is located on top of the booster vaporizer, workers can directly observe the overall operating status of the booster vaporizer.

[0023] Another technical solution also includes an EAG vaporizer 6, which is installed on top of the housing 4.

[0024] In the above technical solution, the EAG vaporizer is used to heat the released low-temperature gas to prevent the low-temperature gas from accumulating downwards due to its low temperature after being released; the front end of the EAG vaporizer is connected to the main vent pipe, and the rear end is connected to the vent riser pipe to be directly discharged into the atmosphere.

[0025] The EAG vaporizer 6 is installed on the top of the housing. This ensures that the EAG vaporizer can fully exchange heat with the atmosphere during venting, and direct sunlight can enhance the vaporization capacity of the EAG vaporizer. A pre-reserved installation area matching the size of the EAG vaporizer is provided on the top of the housing to ensure stable installation. The bottom of the vaporizer is spaced a certain distance from the top surface of the housing to facilitate airflow and heat dissipation.

[0026] Another technical solution also includes an explosion-proof junction box 7 and an instrument cabinet 8, which are located between the booster vaporizer and the wall of the housing 4. The explosion-proof junction box and instrument cabinet are arranged at the head end of the equipment, and the instrument cabinet can be adjusted according to the specific unloading direction for easy observation by operators.

[0027] Another technical solution also includes a pump pool 9, which is connected to the LNG storage tank 3 through a return gas pipeline 10. The return gas pipeline is inclined, with the end connected to the LNG storage tank higher than the end connected to the pump pool, and the return gas pipeline is straight without bends.

[0028] In the above technical solution, because the return gas pipeline is inclined and has no bends, the gaseous natural gas in the pump pool flows naturally upward along the return gas pipeline under the action of pressure difference, and flows back to the gas phase space of the LNG storage tank through the pipeline, avoiding the accumulation of gaseous natural gas in the pump pool and the resulting pressure increase. This straight inclined return gas pipeline design reduces the resistance during gas flow, ensures smooth return of natural gas, and avoids the problems of liquid accumulation and blockage that may occur at bends.

[0029] In another technical solution, the height of the LNG storage tank is greater than its transverse cross-sectional length and width.

[0030] In the above technical solution, the LNG storage tank is mainly used to store cryogenic LNG. Because its height is greater than its lateral cross-sectional dimension, it minimizes the overall equipment length for the same volume, resulting in a smaller footprint and saving horizontal space within the tank. This provides more space for the layout of equipment such as pump skids and booster vaporizers. Simultaneously, it allows for a higher tank level for the same storage volume, increasing the tank-pump level difference, optimizing the submersible pump's operating conditions, facilitating LNG delivery to the pump skid, reducing the pump skid's suction resistance, and improving pump operating efficiency.

[0031] In another technical solution, the container is also provided with an unloading port, at which a purge gun is installed. If the vaporizer freezes, it can be directly treated using the purge gun at the unloading port.

[0032] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A skid-mounted LNG plant piping layout system, characterized by, This includes a pump skid, a booster vaporizer, an LNG storage tank, and a container; among which, The pump skid, the booster vaporizer, and the LNG storage tank are all housed within the container. The pump skid is connected to the booster vaporizer via a pipeline, and the booster vaporizer is connected to the LNG storage tank via a pipeline. The pump skid and the booster vaporizer are located on one side of the LNG storage tank. The booster vaporizer is U-shaped or U-shaped, encircling the pump skid, and its opening faces the LNG storage tank. The booster vaporizer rests on the bottom plate of the container.

2. The skid-mounted box LNG plant piping layout system of claim 1, wherein, The booster vaporizer is equipped with a walking platform on top for workers to move around and operate.

3. The skid-mounted box LNG plant piping layout system of claim 1, wherein, It also includes an EAG vaporizer, which is mounted on top of the housing.

4. The skid-mounted box LNG plant piping layout system of claim 1, wherein, It also includes an explosion-proof junction box and an instrument cabinet, which are located between the booster vaporizer and the box wall.

5. The skid-mounted box LNG plant piping layout system of claim 1, wherein, It also includes a pump pool, which is connected to an LNG storage tank via a return gas pipeline. The return gas pipeline is inclined, with the end connected to the LNG storage tank higher than the end connected to the pump pool. The return gas pipeline is straight and has no bends.

6. The skid-mounted box LNG plant piping layout system of claim 1, wherein, The height of an LNG storage tank is greater than its transverse cross-sectional length and width.

7. The skid-mounted box LNG plant piping layout system of claim 1, wherein, The container is also equipped with an unloading port, and a blower is installed at the unloading port.

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