Cooling device for liquefied natural gas storage tank

Abstract

The utility model relates to the field of gas storage devices, and discloses a cooling device for a liquefied natural gas storage tank, which comprises a fixing frame and a storage tank arranged above the fixing frame, a cooling mechanism is arranged on the outer side of the storage tank, the cooling mechanism comprises a water tank arranged in the fixing frame, and the lower part of one end of the water tank is connected with a water pump. The output end of the water pump is connected with a temporary storage box through a water conveying pipe, the temporary storage box is installed above one end of the storage tank through a supporting frame, the lower portion of the side face of the temporary storage box is connected with two water outlet pipes through guide pipes, and a plurality of dripping nozzles are arranged at the bottoms of the water outlet pipes; the cooling mechanism further comprises moisturizing cotton cloth wound on the outer side of the storage tank. The outer side of the storage tank is in contact with cold water all the time through the moisturizing cotton cloth, the cooling effect is improved, the water pump does not need to work continuously, energy consumption is reduced, and the practicability of the device is improved.

Description

Technical Field

[0001] The utility model relates to the field of gas storage devices, in particular to a cooling device for a liquefied natural gas storage tank. Background Art

[0002] LNG, or liquefied natural gas, is produced by purifying natural gas produced in gas fields and then liquefying it through a series of ultra-low-temperature processes. It is recognized as the cleanest fossil energy source on Earth. LNG is typically at atmospheric pressure, but is liquefied by cooling it to approximately -163°C. LNG, primarily composed of methane, is colorless, odorless, non-toxic, and non-corrosive. Its volume is approximately 1 / 625 of the volume of the same amount of gaseous natural gas and its mass is only about 45% of the same volume of water. During use, the surface of the storage tank must be cooled.

[0003] A search revealed a utility model patent with publication number CN214275332U, which discloses a cooling device for a liquefied natural gas (LNG) storage tank. The device comprises a base plate, a storage tank, two sets of support plates, two sets of support rods, a top plate, a limit plate, an adjustable threaded rod, a slider, a motor assembly, a spray pipe, a water tank, a connecting pipe, a water pump assembly, a water extraction pipe, and a water delivery pipe. The tops of the two sets of support plates are connected to the front and rear sides of the bottom end of the storage tank, respectively. The bottoms of the two sets of support plates are connected to the front and rear sides of the top end of the base plate, respectively. A drainage trough is provided on the outer side of the top end of the base plate. The bottoms of the two sets of support rods are connected to the front and rear sides of the top end of the base plate, respectively. The tops of the two sets of support rods are connected to the front and rear sides of the bottom end of the top plate, respectively. The top of the limit plate is connected to the bottom end of the top plate. This device reduces the temperature difference between the inside and outside of the storage tank, reduces the failure rate of the storage tank, and stabilizes the storage state of LNG, improving the storage safety of LNG and increasing its practicality.

[0004] However, in actual application, the inventors found that the water sprayed from the spray pipe of the device would quickly flow down the outer wall of the storage tank, that is, the contact time between the water and the storage tank was short, and the cooling effect was poor. In addition, the device required the water pump and motor to work continuously, and the energy consumption was high, which urgently needed to be improved. Utility Model Content

[0005] The technical problem to be solved by the present invention is that the existing cooling devices have poor cooling effects and high energy consumption.

[0006] In order to solve the above problems, the technical solution of the present invention is: a cooling device for a liquefied natural gas storage tank, comprising a fixing frame and a storage tank installed above the fixing frame, a cooling mechanism is provided on the outside of the storage tank, the cooling mechanism comprises a water tank installed inside the fixing frame, a water pump is connected to the lower part of one end of the water tank, and a water supply pipe is provided at the upper part of the other end, the output end of the water pump is connected to a cache box through a water pipe, the cache box is installed above one end of the storage tank through a support frame, and two water outlet pipes are connected to the lower part of the side of the cache box through a conduit, and a plurality of drip nozzles are provided at the bottom of the water outlet pipe. The cooling mechanism also includes a moisturizing cotton cloth wrapped around the outside of the storage tank.

[0007] Furthermore, solenoid valves are installed on the water supply pipe and the conduit, and liquid level gauges are installed inside the water tank and the cache box.

[0008] Furthermore, two support frames are provided and are symmetrically installed at both ends of the fixing frame, and a PLC controller is installed on the side of one of the support frames.

[0009] Furthermore, a plurality of water receiving troughs are installed on the top of the fixing frame below the storage tank, and a filter screen is installed inside the water receiving troughs.

[0010] Furthermore, a drainage pipe is provided at the bottom of the water receiving trough, and the bottoms of the multiple drainage pipes are connected through a return pipe. One end of the return pipe is provided with a plug, and the other end is connected to the water tank.

[0011] Furthermore, the two water outlet pipes are respectively installed on the inner tops of the two support frames through positioning rings, and a connecting pipe is detachably connected between the two water outlet pipes.

[0012] The advantages of the present invention compared with the existing technology are: the water pump of the present invention transports the water in the water tank to the cache box through the water pipe, the water in the cache box flows into the water outlet pipe through the conduit, and then drips onto the moisturizing cotton cloth through the drip nozzle. The moisturizing cotton cloth ensures that the outside of the storage tank is always in contact with cold water, thereby improving the cooling effect, and the water pump does not need to work continuously, reducing energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a three-dimensional Figure 1 .

[0014] Figure 2 This is a three-dimensional Figure 2 .

[0015] Figure 3 It is a cross-sectional view of the present utility model.

[0016] Figure 4 It is a connection structure diagram of the water receiving trough of the utility model.

[0017] As shown in the figure: 1. Fixed bracket; 2. Storage tank; 3. Water tank; 4. Water pump; 5. Water supply pipe; 6. Water supply pipe; 7. Buffer box; 8. Support bracket; 9. Conduit; 10. Outlet pipe; 11. Drip nozzle; 12. Moisturizing cotton cloth; 13. PLC controller; 14. Water receiving trough; 15. Filter; 16. Drain pipe; 17. Return pipe; 18. Connecting pipe. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0019] like Figures 1 to 3 As shown, a cooling device for a liquefied natural gas storage tank includes a fixing frame 1 and a storage tank 2 installed above the fixing frame 1, and a cooling mechanism is provided on the outer side of the storage tank 2.

[0020] The cooling mechanism includes a water tank 3 installed inside the fixed frame 1, the lower part of one end of the water tank 3 is connected to a water pump 4, and the upper part of the other end is provided with a water supply pipe 5, and an electromagnetic valve is installed on the water supply pipe 5. The output end of the water pump 4 is connected to the cache box 7 through a water supply pipe 6, and liquid level gauges are installed inside the water tank 3 and the cache box 7. The cache box 7 is installed above one end of the storage tank 2 through a support frame 8, and the lower part of the side of the cache box 7 is connected to two water outlet pipes 10 through a conduit 9, and an electromagnetic valve is installed on the conduit 9. A plurality of drip nozzles 11 are provided at the bottom of the water outlet pipe 10, and there are two support frames 8, which are symmetrically installed at both ends of the fixed frame 1. A PLC controller 13 is installed on the side of one of the support frames 8. The cooling mechanism also includes a moisturizing cotton cloth 12 wrapped around the outside of the storage tank 2, and the two water outlet pipes 10 are respectively installed on the inner top of the two support frames 8 through positioning rings, and a connecting pipe 18 is detachably connected between the two water outlet pipes 10.

[0021] Connect the water supply pipe 10 to the water supply pipe, and the two liquid level gauges can monitor the water levels inside the water tank 3 and the cache box 7 respectively. When the water level in the water tank 3 is lower than the set value, the solenoid valve on the water supply pipe 5 opens to replenish water into the water tank 3. When the liquid level reaches the set value, the solenoid valve closes; when the water level in the cache box 7 is lower than the set value, the water pump 4 opens to replenish water into the cache box 7. When the liquid level reaches the set value, the water pump 4 closes. The speed at which water flows out of the cache box 7 can be adjusted by the solenoid valve on the conduit 9. The water flowing out of the cache box 7 flows into the outlet pipe 10 through the conduit 9, and then drips onto the moisturizing cotton cloth 12 through the drip nozzle 11. The moisturizing cotton cloth 12 allows the outside of the storage tank 2 to always be in contact with cold water, thereby improving the cooling effect, and the water pump 4 does not need to work continuously, thereby reducing energy consumption.

[0022] like Figure 3 and Figure 4 As shown, a plurality of water receiving troughs 14 are installed on the top of the fixing frame 1 below the storage tank 2, a filter screen 15 is installed inside the water receiving trough 14, a drain pipe 16 is provided at the bottom of the water receiving trough 14, and the bottoms of the plurality of drain pipes 16 are connected by a return pipe 17, one end of the return pipe 17 is provided with a plug, and the other end is connected to the water tank 3.

[0023] By setting up the water receiving trough 14, the water dripping from the bottom of the moisturizing cotton cloth 12 can be recovered. The recovered water is filtered by the filter 15 and then flows back into the water tank 3 through the drain pipe 16 and the return pipe 17, thereby realizing the recycling of water and saving water resources.

[0024] In specific use, the water pump 4 transports the water in the water tank 3 to the cache box 7 through the water pipe 6. The water in the cache box 7 flows into the water outlet pipe 10 through the conduit 9, and then drips onto the moisturizing cotton cloth 12 through the drip nozzle 11. The moisturizing cotton cloth 12 allows the outside of the storage tank 2 to always be in contact with cold water, thereby improving the cooling effect. The water pump 4 does not need to work continuously, reducing energy consumption.

[0025] The undisclosed parts in the present invention are all prior art, and their specific structures and working principles are not described in detail here.

[0026] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0027] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

[0028] The above description of the present invention and its embodiments is non-limiting. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by the above, and does not deviate from the purpose of the present invention, without inventive design, a structure and embodiment similar to the technical solution should fall within the scope of protection of the present invention.

Claims

1. A cooling device for a liquefied natural gas storage tank, comprising a fixing frame (1) and a storage tank (2) mounted above the fixing frame (1), wherein a cooling mechanism is provided on the outside of the storage tank (2), and characterized in that: The cooling mechanism comprises a water tank (3) installed inside a fixed frame (1), a water pump (4) is connected to the lower part of one end of the water tank (3), and a water supply pipe (5) is provided at the upper part of the other end, the output end of the water pump (4) is connected to a cache box (7) through a water pipe (6), the cache box (7) is installed above one end of the storage tank (2) through a support frame (8), and two water outlet pipes (10) are connected to the lower part of the side of the cache box (7) through a conduit (9), and a plurality of drip nozzles (11) are provided at the bottom of the water outlet pipe (10), and the cooling mechanism also comprises a moisturizing cotton cloth (12) wrapped around the outside of the storage tank (2).

2. The cooling device for a liquefied natural gas storage tank according to claim 1, characterized in that: The water supply pipe (5) and the conduit (9) are both equipped with electromagnetic valves, and the interiors of the water tank (3) and the cache box (7) are both equipped with liquid level gauges.

3. The cooling device for a liquefied natural gas storage tank according to claim 1, characterized in that: Two support frames (8) are provided and symmetrically mounted on both ends of the fixing frame (1); a PLC controller (13) is mounted on the side of one of the support frames (8).

4. The cooling device for a liquefied natural gas storage tank according to claim 1, characterized in that: A plurality of water receiving troughs (14) are installed on the top of the fixing frame (1) below the storage tank (2), and a filter screen (15) is installed inside the water receiving troughs (14).

5. The cooling device for a liquefied natural gas storage tank according to claim 4, characterized in that: A drainage pipe (16) is provided at the bottom of the water receiving trough (14), and the bottoms of the plurality of drainage pipes (16) are connected via a return pipe (17). One end of the return pipe (17) is provided with a plug, and the other end is connected to the water tank (3).

6. The cooling device for a liquefied natural gas storage tank according to claim 1, characterized in that: The two water outlet pipes (10) are respectively installed on the inner tops of the two support frames (8) through positioning rings, and a connecting pipe (18) is detachably connected between the two water outlet pipes (10).

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