Pressure reduction assembly of LNG storage tank

Abstract

The utility model provides an LNG (Liquefied Natural Gas) storage tank depressurization assembly which comprises a sleeve arranged on the outer side of a storage tank, and the inner side of the sleeve abuts against the outer side of the storage tank and forms a cavity with the storage tank; the first chamber and the second chamber are respectively arranged at the top and the bottom in the sleeve, at least one communicating pipe is arranged between the first chamber and the second chamber, at least two air inlets and at least two air outlets are respectively and uniformly arranged outside the sleeve, and one-way valve structures with the same flow direction are respectively arranged in the air inlets; the water cooling mechanism is arranged inside the sleeve. According to the utility model, after the gas flows to the gas outlet through the gas inlet to form circulation, the heat of the storage tank is dissipated, the flow directions of the one-way valve structures arranged in the gas inlet are the same, so that the temperature in the storage tank can be reduced, and the outer wall of the storage tank wrapped by the sleeve is directly water-cooled by utilizing the water-cooling mechanism, so that the heat dissipation efficiency is improved. The storage tank is further cooled, and the process can be continuously carried out in the whole use state of the storage tank.

Description

Technical Field

[0001] The utility model relates to the technical field of LNG storage tanks, in particular to a pressure reduction component for an LNG storage tank. Background Art

[0002] The LNG (liquefied natural gas) tank pressure reduction component is a component used to reduce the pressure in the LNG tank, and is usually used to reduce the pressure of the gas to avoid excessive pressure. Usually, the LNG tank is usually insulated with insulation materials to reduce the cold loss of the liquefied natural gas. A Chinese patent (publication number CN213146073U) discloses a LNG tank pressure reduction device, which achieves the effect of reducing pressure by allowing the LNG with a lower temperature in the lower layer of the tank body to be sucked in from the inlet pipe, and flows out from the outlet pipe through the connecting pipe, enters the upper layer of the LNG, and absorbs the vaporized BOG gas. However, when the internal low-temperature liquid is led out through the connecting pipe, it will cause energy loss in the tank, which is not suitable for long-term use. Therefore, the utility model proposes an LNG tank pressure reduction component to improve the above-mentioned problems. Utility Model Content

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the LNG storage tank pressure reduction component in the prior art still causes the loss of cold energy inside the storage tank during the pressure reduction process, thereby providing an LNG storage tank pressure reduction component.

[0004] In order to solve the above problems, the utility model provides an LNG storage tank pressure reduction assembly, which includes:

[0005] A sleeve, wherein the sleeve is disposed outside the storage tank, and the inner side of the sleeve abuts against the outer side of the storage tank and forms a cavity between the sleeve and the storage tank;

[0006] The first chamber and the second chamber are respectively arranged at the top and the bottom of the sleeve, at least one connecting pipe is arranged between the first chamber and the second chamber to connect the first chamber and the second chamber, at least two air inlets and air outlets are evenly arranged outside the sleeve, the air inlet is connected to the first chamber, the air outlet is connected to the second chamber, and the air inlets are respectively provided with one-way valve structures with the same flow direction;

[0007] A water cooling mechanism is arranged inside the sleeve, and the water cooling mechanism performs water cooling on the outer wall of the storage tank wrapped by the sleeve.

[0008] Preferably, the vertical cross-section of the sleeve is M-shaped, the top and bottom of the inner side of the sleeve are respectively provided with support rings, the outer side of the support ring is connected to the inner side of the sleeve, and the inner side of the support ring abuts against the outer side of the storage tank.

[0009] Preferably, at least two of the air inlets and the air outlets are evenly and centrally symmetrically arranged with the center of the sleeve as the center;

[0010] The air inlet includes an air inlet pipe and a bell mouth, one end of the air inlet pipe horizontally extends into the first chamber, and the other end of the air inlet pipe is connected to the bell mouth;

[0011] The air outlet comprises an air outlet pipe, one end of which extends into the second chamber, and the other end of which is connected to a curved pipe with a downward pipe opening.

[0012] Preferably, the one-way valve structure is a Tesla one-way valve, and the flow direction of the one-way valve structure is from outside the cavity to inside the first cavity.

[0013] Preferably, the water cooling mechanism includes: an inner jacket, a water inlet pipe and a drain pipe, the inner jacket is arranged in the middle position of the inner side of the sleeve, a cavity is formed between the inner jacket and the sleeve, one end of the water inlet pipe and the drain pipe respectively penetrate the outer wall of the sleeve and extend into the cavity, at least two groups of atomizing nozzles are evenly arranged on the inner jacket, one end of the atomizing nozzle is connected to the cavity by a pipeline, and the other end of the atomizing nozzle extends vertically or obliquely toward the outer wall of the storage tank.

[0014] Preferably, at least three V-shaped tubes are evenly arranged on the top and / or bottom of the inner jacket, one end of the V-shaped tube penetrates into the cavity, and the other end of the V-shaped tube is connected to the atomizing nozzle and extends to the outer wall of the storage tank.

[0015] Preferably, a straight tube is provided in the middle of the inner jacket, one end of the straight tube penetrates into the cavity, and the other end of the straight tube is connected to the atomizing nozzle and extends vertically toward the outer wall of the storage tank.

[0016] Preferably, each group of atomizing nozzles is evenly and centrally symmetrically arranged with the center of the sleeve as the center.

[0017] Preferably, a collar is further provided in the cavity, the collar is provided above the second chamber, the inner side of the collar abuts against the outer wall of the storage tank, the outer side of the collar is provided with an arc surface, and the height dimension of the arc surface gradually decreases from the storage tank to the outside of the sleeve;

[0018] A lifting pump is also arranged on the sleeve ring close to the arc surface, and a lifting pipe is also arranged outside the sleeve, one end of the lifting pipe penetrates into the cavity to connect with the lifting pump, and the other end of the lifting pipe penetrates into the cavity.

[0019] The utility model provides an LNG storage tank pressure reduction assembly with the following beneficial effects:

[0020] 1. The utility model transfers the heat received by the part of the cavity and the storage tank close to the first chamber and the second chamber when the gas flows from the air inlet to the air outlet to form a cycle, takes away the heat in the continuous flow, and dissipates the heat of the storage tank. The one-way valve structure arranged in the air inlet has the same flow direction, which is conducive to the formation of gas flow circulation and avoids the existence of multiple outlets, which leads to unstable flow. When the external air forms a stable flow, it will continue to take away the heat, which is conducive to reducing the internal temperature of the storage tank. Among them, a water cooling mechanism is also used to directly water cool the outer wall of the storage tank covered by the sleeve to further cool the storage tank. This process can be continuously carried out during the entire use state of the storage tank.

[0021] 2. The utility model is also installed in the air intake pipe through a one-way valve structure, and the flow direction of the one-way valve structure is from the outside of the cavity to the inside of the first cavity, so that the gas flows in a single direction during the entire process, so that the atmosphere forms a cycle from the outside of the sleeve to the inside of the sleeve and finally returns to the outside of the sleeve, so as to promote heat dissipation in the sleeve;

[0022] 3. The utility model also forms a cavity between the inner jacket and the sleeve for storing water, so that the water can be atomized by at least two groups of atomizing nozzles evenly arranged on the inner jacket, and the atomized water is evenly distributed on the outer wall of the storage tank. In this process, the heat in the sleeve is absorbed. At the same time, the atomized water absorbs the heat of the storage tank while flowing on the outer wall of the storage tank, thereby further dissipating the heat. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the general assembly of the utility model;

[0024] Figure 2 This is a front view structural schematic diagram of the utility model;

[0025] Figure 3 It is a schematic diagram of the structural installation of the utility model;

[0026] Figure 4 It is a schematic diagram of the structural installation of the utility model;

[0027] Figure 5 It is a schematic diagram of the structural installation of the utility model.

[0028] The reference numerals are:

[0029] 1. Sleeve; 2. First chamber; 3. Second chamber; 4. Connecting pipe; 5. Support ring; 6. Air inlet pipe; 7. Bell mouth; 8. Air outlet pipe; 9. Elbow pipe; 10. Inner jacket; 11. Water inlet pipe; 12. Drain pipe; 13. Atomizing nozzle; 14. V-shaped pipe; 15. Straight pipe; 16. Ring; 17. Arc surface; 18. Lifting pump; 19. Lifting pipe. DETAILED DESCRIPTION

[0030] like Figure 1-5 As shown, the utility model provides an LNG storage tank pressure reduction assembly, which includes:

[0031] A sleeve 1, which is arranged on the outside of a storage tank, and the inner side of the sleeve 1 abuts against the outside of the storage tank and forms a cavity with the storage tank; a first chamber 2 and a second chamber 3 are respectively arranged at the top and the bottom of the sleeve 1, and at least one connecting pipe 4 is arranged between the first chamber 2 and the second chamber 3 to connect the first chamber 2 and the second chamber 3; at least two air inlets and air outlets are evenly arranged on the outside of the sleeve 1, and the air inlet is connected to the first chamber 2, and the air outlet is connected to the second chamber 3, and the air inlets are respectively provided with one-way valve structures with the same flow direction; a water cooling mechanism is arranged on the inside of the sleeve 1, and the water cooling mechanism performs water cooling on the outer wall of the storage tank wrapped by the sleeve 1. Figure 1-5 As shown, a LNG tank pressure reduction component is used, which, in order to avoid excessive internal pressure of the LNG tank, continuously cools the tank during use, wherein a sleeve 1 is sleeved on the outside of the tank, and the sleeve 1 can be a split design, or can be an integrated design with the tank, wherein the inner side of the sleeve 1 abuts against the outside of the tank to form a cavity, wherein, after the sleeve 1 and the tank form abutment, the bottom of the sleeve can be fixed by setting corresponding support rods to position the sleeve and the tank to maintain a relative position, or corresponding support points can be set near the abutment position to keep the sleeve fixed outside the tank, the first chamber 2 and the second chamber 3 are set at the top and bottom of the sleeve 1, and the first chamber 2 and the second chamber 3 are connected by at least one connecting pipe 4, and when the gas outside the tank passes When the gas enters the first chamber 2 through at least two air inlets, it flows to the second chamber 3 through the connecting pipe 4 and is finally discharged from at least two air outlets. When the gas flows from the air inlet to the air outlet to form a cycle, it drives the heat in the cavity and the part of the tank close to the first chamber 2 and the second chamber 3 to be transferred, and takes away the heat in its continuous flow to dissipate the heat of the tank. The one-way valve structure arranged in the air inlet has the same flow direction, which helps to form a gas flow cycle and avoids the existence of multiple outlets, which leads to unstable flow. After the external air forms a stable flow, it will continue to take away heat, which helps to reduce the internal temperature of the tank. A water cooling mechanism is also used to directly cool the outer wall of the tank covered by the sleeve 1 to further cool the tank. This process can be continued throughout the entire tank usage state.

[0032] In some embodiments, the vertical cross-section of the sleeve 1 is M-shaped, and the top and bottom of the inner side of the sleeve 1 are respectively provided with support rings 5, the outer side of the support ring 5 is connected to the inner side of the sleeve 1, and the inner side of the support ring 5 abuts against the outer side of the storage tank. Figure 1-5 As shown, the vertical cross-sectional shape of the sleeve 1 is M-shaped, which increases the area of ​​the outer surface of the sleeve 1. When the temperature in the cavity is high, part of the heat is directly transferred through the sleeve 1. When the outer surface of the sleeve 1 is increased, it is helpful to dissipate heat. The outer side of the support ring 5 is connected to the inner side of the sleeve 1, which can be bonded or bolted. The inner side of the support ring 5 abuts the outer side of the storage tank. The support ring 5 is made of rubber, which helps to improve the sealing effect on the cavity after abutment.

[0033] In some embodiments, at least two of the air inlets and the air outlets are uniformly symmetrical with the center of the sleeve 1 as the center of the circle; the air inlet includes an air inlet pipe 6 and a bell mouth 7, one end of the air inlet pipe 6 horizontally extends into the first chamber 2, and the other end of the air inlet pipe 6 is connected to the bell mouth 7; the air outlet includes: an air outlet pipe 8, one end of the air outlet pipe 8 extends into the second chamber 3, and the other end of the air outlet pipe 8 is connected to a curved pipe 9 with the pipe mouth downward. Figure 1-5 As shown, at least two air inlets and air outlets are evenly and symmetrically arranged relative to the sleeve 1, wherein the air inlet can be in the shape of a vortex radiating outward, which helps to collect the atmosphere, so that the atmosphere is collected through the bell mouth 7 and enters the air inlet pipe 6, and finally enters the first chamber 2, wherein the one-way valve structure is installed in the middle of the air inlet pipe 6; the end of the air outlet pipe 8 close to the outside is connected to the downward curved pipe 9, so that the gas coming out from the inside flows downward, avoiding the influence of strong winds, etc., and avoiding interference in the outward flow of the gas in the second chamber 3.

[0034] In some embodiments, the one-way valve structure is a Tesla one-way valve, and the flow direction of the one-way valve structure is from the cavity to the first chamber 2. Figure 1-5 As shown, the one-way valve structure is installed in the intake pipe 6. The Tesla one-way valve is commercially available. The flow direction of the one-way valve structure is from the outside of the cavity to the first chamber 2, so that a single flow direction is maintained during the entire gas flow process, so that a circulation of atmosphere is formed from the outside of the sleeve 1 to the inside of the sleeve 1 and finally back to the outside of the sleeve 1, so as to promote heat dissipation in the sleeve 1.

[0035] In some embodiments, the water cooling mechanism includes: an inner jacket 10, a water inlet pipe 11 and a drain pipe 12. The inner jacket 10 is arranged at the middle position of the inner side of the sleeve 1. A cavity is formed between the inner jacket 10 and the sleeve 1. One end of the water inlet pipe 11 and the drain pipe 12 respectively penetrate the outer wall of the sleeve 1 and extend into the cavity. At least two groups of atomizing nozzles 13 are evenly arranged on the inner jacket 10. One end of the atomizing nozzle 13 is connected to the cavity by a pipeline, and the other end of the atomizing nozzle 13 extends vertically or obliquely toward the outer wall of the storage tank. Figure 1-5 As shown, the inner jacket 10 of the water cooling mechanism is located in the cavity, and a cavity is formed between the inner jacket 10 and the sleeve 1 for storing water, so that the water can be atomized by at least two groups of atomizing nozzles 13 evenly arranged on the inner jacket 10, and the atomized water is evenly distributed on the outer wall of the storage tank and flows downward. In this process, the heat of the storage tank is absorbed and further dissipated. Corresponding stop valves are arranged on the water inlet pipe 11 and the drain pipe 12 to control their circulation, and they are opened or closed during use.

[0036] In some embodiments, at least three V-shaped tubes 14 are evenly arranged on the top and / or bottom of the inner jacket 10, one end of the V-shaped tube 14 penetrates into the cavity, and the other end of the V-shaped tube 14 is connected to the atomizing nozzle 13 and extends toward the outer wall of the storage tank. Figure 1-5 As shown, at least three V-shaped tubes 14 are evenly arranged on the top and / or bottom of the inner jacket 10, and the water in the cavity is discharged through the V-shaped tubes 14 and sent to the atomizing nozzle 13. At the same time, the V-shaped tubes 14 play a role in changing the angle. The V-shaped tubes 14 are commercially available, and the angle of the V-shaped tubes 14 can be adjusted according to the relative distance between the sleeve 1 and the storage tank, so that the spray range of the atomizing nozzle 13 on the storage tank is larger.

[0037] In some embodiments, a straight tube 15 is disposed in the middle of the inner jacket 10, one end of the straight tube 15 penetrates into the cavity, and the other end of the straight tube 15 is connected to the atomizing nozzle 13 and extends vertically toward the outer wall of the storage tank. Figure 1-5 As shown, the straight pipe 15 in the middle of the inner jacket 10 passes the water in the cavity out and is connected to the atomizing nozzle 13, so that the atomizing nozzle 13 at this location radiates upward and downward from the middle of the cavity to form a spray range of the atomizing nozzle 13.

[0038] In some embodiments, each group of the atomizing nozzles 13 is evenly and centrally symmetrically arranged with the center of the sleeve 1 as the center. Figure 1-5 As shown, each group of atomizing nozzles 13 is evenly and centrally symmetrically arranged with the center of the sleeve 1 as the center of the circle, so that after the sleeve 1 covers the storage tank, the atomizing nozzles 13 can evenly water-cool the exterior of the covered portion of the storage tank.

[0039] In some embodiments, a collar 16 is further provided in the cavity, and the collar 16 is provided above the second chamber 3, the inner side of the collar 16 abuts against the outer wall of the storage tank, and the outer side of the collar 16 is provided with an arc surface 17, the height of which gradually decreases from the storage tank to the outside of the sleeve 1; a lifting pump 18 is also provided on the collar 16 near the arc surface 17, and a lifting pipe 19 is also provided outside the sleeve 1, one end of the lifting pipe 19 penetrates into the cavity to connect to the lifting pump 18, and the other end of the lifting pipe 19 penetrates into the cavity. Figure 1-5 As shown, a collar 16 is arranged in the cavity, and the collar 16 is above the second cavity 3. The inner side of the collar 16 abuts against the outer wall of the storage tank. A rubber layer can be arranged on the inner side of the collar 16 to maintain the sealing effect on the cavity after the two abut. An arc surface 17 is formed on the outer side of the collar 16, and the height dimension of the axial cross section of the arc surface 17 gradually decreases from the inside of the storage tank to the outside of the sleeve 1, so that the water vapor sprayed from the atomizing nozzle 13 is collected by the area formed by the collar 16 and the sleeve 1 after returning, and is returned to the cavity through the lifting pipe 19 by the lifting pump 18 arranged therein, so that the water resources are recycled. The lifting pump 18 is commercially available, and a corresponding stop valve is arranged on the lifting pipe 19 to control the flow of the lifting pipe 19 when reflux is required.

[0040] The above is only a preferred embodiment of the utility model, and is not intended to limit the utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the utility model should be included in the protection scope of the utility model. The above is only a preferred implementation of the utility model. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the utility model, and these improvements and variations should also be regarded as the protection scope of the utility model.

Claims

1. An LNG storage tank pressure reduction assembly, characterized in that: include: A sleeve, wherein the sleeve is disposed outside the storage tank, and the inner side of the sleeve abuts against the outer side of the storage tank and forms a cavity between the sleeve and the storage tank; The first chamber and the second chamber are respectively arranged at the top and the bottom of the sleeve, at least one connecting pipe is arranged between the first chamber and the second chamber to connect the first chamber and the second chamber, at least two air inlets and air outlets are evenly arranged outside the sleeve, the air inlet is connected to the first chamber, the air outlet is connected to the second chamber, and the air inlets are respectively provided with one-way valve structures with the same flow direction; A water cooling mechanism is arranged inside the sleeve, and the water cooling mechanism performs water cooling on the outer wall of the storage tank wrapped by the sleeve.

2. The LNG storage tank pressure reduction assembly according to claim 1, characterized in that: The vertical cross-section of the sleeve is M-shaped, and support rings are respectively provided at the top and bottom of the inner side of the sleeve. The outer side of the support ring is connected to the inner side of the sleeve, and the inner side of the support ring abuts against the outer side of the storage tank.

3. The LNG storage tank pressure reduction assembly according to claim 1, characterized in that: At least two of the air inlets and the air outlets are evenly and centrally symmetrically arranged with the center of the sleeve as the center of the circle; The air inlet includes an air inlet pipe and a bell mouth, one end of the air inlet pipe horizontally extends into the first chamber, and the other end of the air inlet pipe is connected to the bell mouth; The air outlet comprises an air outlet pipe, one end of which extends into the second chamber, and the other end of which is connected to a bent pipe with its pipe opening downward.

4. The LNG storage tank pressure reduction assembly according to claim 1, characterized in that: The one-way valve structure is a Tesla one-way valve, and the flow direction of the one-way valve structure is from outside the cavity to inside the first cavity.

5. The LNG storage tank pressure reduction assembly according to claim 1, characterized in that: The water cooling mechanism includes: an inner jacket, a water inlet pipe and a drain pipe. The inner jacket is arranged in the middle position of the inner side of the sleeve. A cavity is formed between the inner jacket and the sleeve. One end of the water inlet pipe and one end of the drain pipe respectively penetrate the outer wall of the sleeve and extend into the cavity. At least two groups of atomizing nozzles are evenly arranged on the inner jacket. One end of the atomizing nozzle is connected to the cavity by a pipeline, and the other end of the atomizing nozzle extends vertically or obliquely toward the outer wall of the storage tank.

6. The LNG storage tank pressure reduction assembly according to claim 5, characterized in that: At least three V-shaped tubes are evenly arranged on the top and / or bottom of the inner jacket, one end of the V-shaped tube penetrates into the cavity, and the other end of the V-shaped tube is connected to the atomizing nozzle and extends to the outer wall of the storage tank.

7. The LNG storage tank pressure reduction assembly according to claim 5, characterized in that: A straight pipe is arranged in the middle of the inner jacket, one end of the straight pipe penetrates into the cavity, and the other end of the straight pipe is connected to the atomizing nozzle and extends vertically toward the outer wall of the storage tank.

8. The LNG storage tank pressure reduction assembly according to claim 5, characterized in that: Each group of atomizing nozzles is evenly and centrally symmetrically arranged with the center of the sleeve as the center of the circle.

9. The LNG storage tank pressure reduction assembly according to claim 5, characterized in that: A collar is also provided in the cavity, and the collar is provided above the second chamber, the inner side of the collar abuts against the outer wall of the storage tank, and the outer side of the collar is provided with an arc surface, and the height dimension of the arc surface gradually decreases from the storage tank to the outside of the sleeve; A lifting pump is also arranged on the sleeve ring close to the arc surface, and a lifting pipe is also arranged outside the sleeve. One end of the lifting pipe penetrates into the cavity to connect with the lifting pump, and the other end of the lifting pipe penetrates into the cavity.

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