Energy-saving LNG receiving station cold energy utilization device

Abstract

The utility model relates to the field of cold energy utilization devices, in particular to an energy-saving cold energy utilization device for an LNG receiving station. The technical problem is that an existing cold energy utilization device of the LNG receiving station is generally lack of a cold-heat exchange mechanism, and cold energy is difficult to efficiently recover from the LNG regasification process without being directly discharged into seawater or atmosphere. According to the technical scheme, the energy-saving LNG receiving station cold energy utilization device comprises a cold and heat exchange assembly; the device further comprises a first liquid pumping assembly, a first cold storage assembly, a mounting assembly, a second liquid pumping assembly and a second cold storage assembly. Cold water is pumped into the second cold storage assembly to be stored by starting the second liquid pumping assembly, when a cooling salt solution is injected into the cold and heat exchange assembly through the installation assembly, the first liquid pumping assembly is started to pump the cooling salt solution into the first cold storage assembly to be stored, and therefore the technical problem is solved.

Description

Technical Field

[0001] The utility model belongs to the field of cold energy utilization devices, and in particular relates to an energy-saving cold energy utilization device for an LNG receiving station. Background Art

[0002] The cold energy utilization device of the LNG receiving station is a device for improving the energy efficiency of the decompression and gasification process of liquefied natural gas at the receiving station. LNG is stored and transported in the form of a low-temperature liquid below atmospheric pressure at room temperature. At the receiving station, LNG needs to be re-gasified into natural gas in order to enter the natural gas pipeline network or be used for other purposes. This process contains a large amount of cold energy, which is usually wasted. The existing cold energy utilization device of the LNG receiving station usually lacks a mechanism for cold and heat exchange, and it is difficult to efficiently recover cold energy from the LNG regasification process without directly discharging it into the seawater or the atmosphere. Further improvement is needed. Utility Model Content

[0003] In order to overcome the problem that the existing cold energy utilization devices of LNG receiving stations usually lack a mechanism for heat exchange, it is difficult to efficiently recover cold energy from the LNG regasification process without directly discharging it into the seawater or the atmosphere.

[0004] The technical solution of the utility model is: an energy-saving cold energy utilization device for an LNG receiving station, comprising a heat-cold exchange component; further comprising a first liquid pumping component, a first cold storage component, an installation component, a second liquid pumping component and a second cold storage component; the heat-cold exchange component is provided with a first liquid pumping component and a second liquid pumping component for pumping liquid; the heat-cold exchange component is provided with a first cold storage component and a second cold storage component for storing cold; the heat-cold exchange component is also provided with an installation component for installation.

[0005] Preferably, when in use, the installation component is first installed on the heat exchange component, the external water or cooling salt solution is placed into the heat exchange component through the installation component, and then the LNG of the receiving station is connected to the heat exchange component. Since the main component of LNG is liquid methane, its temperature is very low, so it will continuously release cold air, which will refrigerate the heat exchange component, and the water body will become cold through heat exchange. Then, the second pumping component is turned on to pump cold water into the second cold storage component for storage. When the cooling salt solution is injected into the heat exchange component through the installation component, the first pumping component is turned on to pump the cooling salt solution into the first cold storage component for storage. This solves the problem that the existing cold energy utilization device of the LNG receiving station usually lacks a heat exchange mechanism, making it difficult to efficiently recover cold energy from the LNG regasification process without directly discharging it into the seawater or the atmosphere.

[0006] Preferably, the heat exchange component includes a bearing plate, a support, an ultra-thin copper cylinder, a connecting column, an insulation cylinder and a first fixed tube; two supports are fixedly connected to the upper end of the bearing plate; the ultra-thin copper cylinder is fixedly connected to the two supports; a plurality of connecting columns are fixedly connected to the outer wall of the ultra-thin copper cylinder; the other end of the connecting column is fixedly connected to the insulation cylinder; the front and rear ends of the insulation cylinder are both closed structures; the front and rear inner walls of the insulation cylinder are fixedly connected to the outer wall of the ultra-thin copper cylinder; the front and rear ends of the ultra-thin copper cylinder are fixedly connected to the first fixed tube in a through-type manner. When in use, the LNG of the receiving station is connected to the heat exchange component. Since the main component of LNG is liquid methane, its temperature is very low, so it will continuously release cold air, which will cool the inside of the insulation cylinder.

[0007] Preferably, the first liquid extraction component includes a first liquid extraction pump, a first liquid extraction tube and a first liquid outlet tube; the first liquid extraction pump is fixedly connected to the upper end of the supporting plate; the first liquid extraction tube is fixedly connected to the liquid extraction port of the first liquid extraction pump; the first liquid outlet tube is fixedly connected to the liquid outlet port of the first liquid extraction pump; the other end of the first liquid extraction tube passes through the outer wall of the insulation tube and extends to the inner wall of the insulation tube. When it is necessary to extract the liquid from the inner wall of the insulation tube, the first liquid extraction pump can be turned on to quickly extract the liquid in the insulation tube.

[0008] Preferably, the first cold storage assembly includes a first box body, an insulation tank, an insulation block, a screw hole, a cover body, a handle and a first threaded column; the upper end of the bearing plate is fixedly connected to the first box body; the lower end surface of the inner wall of the first box body is fixedly connected to the insulation tank; a plurality of insulation blocks are movably provided on the outer wall of the insulation tank; a screw hole is provided on the upper end of the insulation block; a cover body is movably provided on the upper ends of the plurality of insulation blocks; the outer wall of the cover body is fitted with the inner wall of the first box body; a handle is fixedly connected to the upper end of the cover body; the first threaded column is threadedly installed at the four corners of the upper and lower ends of the cover body; the lower end of the first threaded column is threadedly installed on the inner wall of the screw hole; the inner and outer walls of the insulation tank are fixedly connected with the second fixed pipe in a through-type manner ; The other end of the second fixed tube passes through the first box body and extends to the outside of the first box body; a second solenoid valve is arranged on the second fixed tube; the other end of the first liquid outlet pipe passes through the first box body and the outer wall of the insulation tank and extends to the inner wall of the insulation tank, and the insulation block is placed inside the first box body, so that multiple insulation blocks are placed around the outer wall of the insulation tank, which can improve the insulation of the insulation tank, and then the cover body is placed on the upper end of the multiple insulation blocks, and then the first threaded column is passed through the cover body from top to bottom and installed on the inner wall of the screw hole, so that the cover body can be quickly installed and placed, and when the insulation block needs to be taken out, the multiple insulation blocks can be taken out by holding the handle.

[0009] Preferably, the installation assembly includes a third fixed tube, a fixed tank, a first inner tube, a second inner tube, a mounting cover, an injection tube and a first solenoid valve; the third fixed tube is fixedly connected to the upper end of the insulation tube in a through-type manner; the upper end of the third fixed tube is fixedly connected to the fixed tank; the first inner tube and the second inner tube are fixedly connected to the lower end surface of the inner wall of the fixed tank; the mounting cover is threadedly mounted on the inner wall of the upper end of the fixed tank; the injection tube is fixedly connected to the center of the upper and lower ends of the mounting cover in a through-type manner; the first solenoid valve is fixedly arranged on the injection tube, and the mounting cover is threadedly mounted on the inner wall of the fixed tank, so that water or cooling salt solution can be easily injected into the inner wall of the fixed tank through the injection tube.

[0010] Preferably, the second liquid pumping assembly includes a second liquid pump, a second liquid pumping tube and a second liquid outlet tube; the second liquid pump is fixedly connected to the upper end of the supporting plate; the second liquid pumping tube is fixedly connected to the liquid pumping port of the second liquid pump; the other end of the second liquid pumping tube passes through the outer wall of the insulation tube and extends to the inner wall of the insulation tube; the second liquid outlet tube is fixedly connected to the liquid outlet port of the second liquid pump, and turning on the second liquid pump can facilitate the extraction of liquid from the insulation tube.

[0011] Preferably, the second cold storage assembly includes a second box body, a supporting frame, a movable cover and a second threaded column; the upper end of the supporting plate is fixedly connected to the second box body; the supporting frame is fixedly connected to the upper part of the inner wall of the second box body; a movable cover is movably provided on the upper end of the supporting frame; second threaded columns are installed with through-threads at the four corner edges of the upper and lower ends of the movable cover; the lower end of the second threaded column passes through the movable cover and is threadedly installed in the wall layer of the supporting frame; the other end of the second liquid outlet pipe passes through the outer wall of the second box body and extends to the inner wall of the second box body, the movable cover is placed on the upper end of the supporting frame, and the second threaded column is passed through the movable cover and threadedly installed in the wall layer of the supporting frame, so that the upper end of the second box body can be sealed.

[0012] Beneficial effects of the utility model:

[0013] 1. By installing the installation component on the cold and heat exchange component, the external water or cooling salt solution is placed into the cold and heat exchange component through the installation component, and then the LNG of the receiving station is connected to the cold and heat exchange component. Since the main component of LNG is liquid methane, its temperature is very low, so it will continuously release cold air, which will refrigerate the cold and heat exchange component. The water body will become cold through heat exchange, and then the second pumping component is turned on to pump cold water into the second cold storage component for storage. When the cooling salt solution is injected into the cold and heat exchange component through the installation component, the first pumping component is turned on to pump the cooling salt solution into the first cold storage component for storage, thereby solving the problem that the existing cold energy utilization device of the LNG receiving station usually lacks a cold and heat exchange mechanism, and it is difficult to efficiently recover cold energy from the LNG regasification process without directly discharging it into the seawater or the atmosphere;

[0014] 2. When it is necessary to extract the liquid on the inner wall of the insulation cylinder, the first liquid extraction pump can be turned on to quickly extract the liquid in the insulation cylinder, and the insulation block is placed inside the first box body, so that multiple insulation blocks are placed around the outer wall of the insulation tank, which can improve the insulation of the insulation tank, and then the cover body is placed on the upper end of the multiple insulation blocks, and then the first threaded column is passed through the cover body from top to bottom and installed on the inner wall of the screw hole, so that the cover body can be quickly installed and placed. When it is necessary to take out the insulation block, the multiple insulation blocks can be taken out by holding the handle. The setting of the insulation block can slow down the speed of cold air loss;

[0015] 3. By threading the mounting cover on the inner wall of the fixed tank, water or cooling salt solution can be easily injected into the inner wall of the fixed tank through the injection pipe. The movable cover is placed on the upper end of the bearing frame, and the second threaded column is passed through the movable cover thread and installed in the wall layer of the bearing frame. The upper end of the second box body can be sealed, which is convenient for the inspection and maintenance of the second box body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 What is shown is a three-dimensional structural schematic diagram of an energy-saving cold energy utilization device for an LNG receiving station of the utility model;

[0017] Figure 2 The present invention shows a schematic diagram of the three-dimensional split structure of a heat exchange component and a mounting component of an energy-saving LNG receiving station cold energy utilization device;

[0018] Figure 3 The schematic diagram of the three-dimensional split structure of a heat exchange component, a first liquid extraction component, a first cold storage component and a second liquid extraction component of an energy-saving LNG receiving station cold energy utilization device of the utility model is shown;

[0019] Figure 4 What is shown is a three-dimensional split structure schematic diagram of the second cold storage component of an energy-saving LNG receiving station cold energy utilization device of the utility model.

[0020] The marks in the attached drawings are: 1. cold and heat exchange component; 101. bearing plate; 102. support; 103. ultra-thin copper cylinder; 104. connecting column; 105. insulation cylinder; 106. first fixed pipe; 2. first liquid extraction component; 201. first liquid extraction pump; 202. first liquid extraction pipe; 203. first liquid outlet pipe; 3. first cold storage component; 301. first box; 302. insulation tank; 303. insulation block; 304. screw hole; 305. cover; 306. handle; 307. first threaded column; 308, second fixed tube; 309, second solenoid valve; 4, installation assembly; 401, third fixed tube; 402, fixed tank; 403, first inner tube; 404, second inner tube; 405, installation cover; 406, injection tube; 407, first solenoid valve; 5, second liquid extraction assembly; 501, second liquid extraction pump; 502, second liquid extraction tube; 503, second liquid outlet tube; 6, second cold storage assembly; 601, second box body; 602, support frame; 603, movable cover; 604, second threaded column. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0022] See also Figure 1-Figure 4 The utility model provides an embodiment: an energy-saving cold energy utilization device for an LNG receiving station, comprising a heat exchange component 1; further comprising a first liquid pumping component 2, a first cold storage component 3, an installation component 4, a second liquid pumping component 5 and a second cold storage component 6; the heat exchange component 1 is provided with a first liquid pumping component 2 and a second liquid pumping component 5 for pumping liquid; the heat exchange component 1 is provided with a first cold storage component 3 and a second cold storage component 6 for storing cold; the heat exchange component 1 is also provided with an installation component 4 for installation.

[0023] See also Figure 2 In this embodiment, the heat exchange component 1 includes a bearing plate 101, a support 102, an ultra-thin copper tube 103, a connecting column 104, an insulation tube 105 and a first fixed tube 106; two supports 102 are fixedly connected to the upper end of the bearing plate 101; the ultra-thin copper tube 103 is fixedly connected to the two supports 102; a plurality of connecting columns 104 are fixedly connected to the outer wall of the ultra-thin copper tube 103; the other end of the connecting column 104 is fixedly connected to the insulation tube 105; the front and rear ends of the insulation tube 105 are both closed structures; the inner walls of the front and rear ends of the insulation tube 105 are fixedly connected to the outer wall of the ultra-thin copper tube 103; the front and rear ends of the ultra-thin copper tube 103 are both fixedly connected with the first fixed tube 106 in a through-type manner.

[0024] See also Figure 3In the present embodiment, the first liquid pumping component 2 includes a first liquid pumping pump 201, a first liquid pumping pipe 202 and a first liquid outlet pipe 203; the first liquid pumping pump 201 is fixedly connected to the upper end of the carrying plate 101; the first liquid pumping pipe 202 is fixedly connected to the liquid pumping port of the first liquid pump 201; the first liquid outlet pipe 203 is fixedly connected to the liquid outlet port of the first liquid pump 201; the other end of the first liquid pumping pipe 202 passes through the outer wall of the insulation cylinder 105 and extends to the inner wall of the insulation cylinder 105; the first cold storage component 3 includes a first box body 301, an insulation tank 302, an insulation block 303, a screw hole 304, a cover body 305, a handle 306 and a first threaded column 307; the first box body 301 is fixedly connected to the upper end of the carrying plate 101; the insulation tank 302 is fixedly connected to the lower end surface of the inner wall of the first box body 301; the outer wall of the insulation tank 302 is movably provided There are multiple insulation blocks 303; a screw hole 304 is opened at the upper end of the insulation block 303; a cover body 305 is movably provided at the upper end of the multiple insulation blocks 303; the outer wall of the cover body 305 is in contact with the inner wall of the first box body 301; a handle 306 is fixedly connected to the upper end of the cover body 305; first threaded columns 307 are threadedly installed at the four corners of the upper and lower ends of the cover body 305; the lower end of the first threaded column 307 is threadedly installed on the inner wall of the screw hole 304; the inner and outer walls of the insulation tank 302 are fixedly connected with a second fixed pipe 308; the other end of the second fixed pipe 308 penetrates the first box body 301 and extends to the outside of the first box body 301; a second solenoid valve 309 is arranged on the second fixed pipe 308; the other end of the first liquid outlet pipe 203 penetrates the outer wall of the first box body 301 and the insulation tank 302 and extends to the inner wall of the insulation tank 302.

[0025] See also Figure 2 In this embodiment, the installation component 4 includes a third fixed tube 401, a fixed tank 402, a first inner tube 403, a second inner tube 404, a mounting cover 405, a liquid injection tube 406 and a first solenoid valve 407; the upper end of the insulation tube 105 is fixedly connected with the third fixed tube 401 in a through-type manner; the upper end of the third fixed tube 401 is fixedly connected with the fixed tank 402; the lower end surface of the inner wall of the fixed tank 402 is fixedly connected with the first inner tube 403 and the second inner tube 404; the mounting cover 405 is threadedly installed on the inner wall of the upper end of the fixed tank 402; the liquid injection tube 406 is fixedly connected to the center of the upper and lower ends of the mounting cover 405 in a through-type manner; the first solenoid valve 407 is fixedly arranged on the liquid injection tube 406.

[0026] See also Figure 3 and 4In this embodiment, the second liquid pumping component 5 includes a second liquid pump 501, a second liquid pumping pipe 502 and a second liquid outlet pipe 503; the upper end of the carrier plate 101 is fixedly connected to the second liquid pump 501; the second liquid pumping pipe 502 is fixedly connected to the liquid pumping port of the second liquid pump 501; the other end of the second liquid pumping pipe 502 passes through the outer wall of the insulation tube 105 and extends to the inner wall of the insulation tube 105; the second liquid outlet pipe 503 is fixedly connected to the liquid outlet port of the second liquid pump 501; the second cold storage component 6 includes a second box body 601, a carrier frame 602, and a movable cover 603 and a second threaded column 604; the upper end of the supporting plate 101 is fixedly connected to the second box body 601; the upper part of the inner wall of the second box body 601 is fixedly connected to the supporting frame 602; a movable cover 603 is movably provided on the upper end of the supporting frame 602; the second threaded column 604 is threadedly installed at the four corner edges of the upper and lower ends of the movable cover 603; the lower end of the second threaded column 604 passes through the movable cover 603 and is threadedly installed in the wall layer of the supporting frame 602; the other end of the second liquid outlet pipe 503 passes through the outer wall of the second box body 601 and extends to the inner wall of the second box body 601.

[0027] When working, firstly, the heat preservation block 303 is placed inside the first box body 301, so that the multiple heat preservation blocks 303 are placed around the outer wall of the heat preservation tank 302, so as to improve the heat preservation of the heat preservation tank 302, and then the cover body 305 is placed on the upper end of the multiple heat preservation blocks 303, and then the first threaded column 307 is passed through the cover body 305 from top to bottom and is threadedly installed on the inner wall of the screw hole 304, so that the cover body 305 can be quickly installed and placed, and when the heat preservation blocks 303 need to be taken out, the multiple heat preservation blocks 303 can be taken out by holding the handle 306;

[0028] When the cold source needs to be recovered, the LNG at the receiving station is connected to the first fixed pipe 106 on the cold-heat exchange assembly 1. Since the main component of LNG is liquid methane, its temperature is very low, so it will continuously release cold air, which will refrigerate the insulation cylinder 105;

[0029] The mounting cover 405 is threadedly mounted on the inner wall of the fixed tank 402, so that water or cooling salt solution can be conveniently injected into the inner wall of the fixed tank 402 through the injection pipe 406. The solution will flow into the inner wall of the heat preservation tube 105 through the fixed tank 402 and the third fixed pipe 401. The liquid contacts the outer wall of the ultra-thin copper tube 103 to absorb the cold source.

[0030] When it is necessary to extract the liquid from the inner wall of the heat preservation tube 105, the first liquid extraction pump 201 can be turned on to quickly extract the liquid from the heat preservation tube 105 and place it in the heat preservation tank 302 for temporary storage, and the second liquid extraction pump 501 can be turned on to conveniently extract the liquid from the heat preservation tube 105 to the second box 601 for temporary storage;

[0031] Place the movable cover 603 on the upper end of the carrying frame 602, and then pass the second threaded column 604 through the movable cover 603 and threadably install it in the wall layer of the carrying frame 602, so that the upper end of the second box body 601 can be sealed, which is convenient for maintenance inside the second box body 601.

[0032] Through the above steps, when in use, first install the installation component 4 on the heat exchange component 1, place the external water or cooling salt solution into the heat exchange component 1 through the installation component 4, and then connect the LNG of the receiving station to the heat exchange component 1. Since the main component of LNG is liquid methane, its temperature is very low, so it will continuously release cold air, which will refrigerate the heat exchange component 1, and the water body will become cold through heat exchange. Then, open the second pumping component 5 to pump cold water into the second cold storage component 6 for storage. When the cooling salt solution is injected into the heat exchange component 1 through the installation component 4, open the first pumping component 2 to pump the cooling salt solution into the first cold storage component 3 for storage, thereby solving the problem that the existing cold energy utilization device of the LNG receiving station usually lacks a heat exchange mechanism, and it is difficult to efficiently recover cold energy from the LNG regasification process without directly discharging it into the seawater or the atmosphere.

[0033] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the purpose of the present invention.

Claims

1. An energy-saving cold energy utilization device for an LNG receiving station, comprising a cold and heat exchange component (1); characterized in that: The heat exchange assembly (1) further comprises a first liquid extraction assembly (2), a first cold storage assembly (3), a mounting assembly (4), a second liquid extraction assembly (5) and a second cold storage assembly (6); the heat exchange assembly (1) is provided with a first liquid extraction assembly (2) and a second liquid extraction assembly (5) for extracting liquid; the heat exchange assembly (1) is provided with a first cold storage assembly (3) and a second cold storage assembly (6) for storing cold; the heat exchange assembly (1) is also provided with a mounting assembly (4) for installation; the heat exchange assembly (1) comprises a bearing plate (101), a support (102), an ultra-thin copper cylinder (103), and a connecting column (104). , a heat-insulating tube (105) and a first fixed tube (106); the upper end of the bearing plate (101) is fixedly connected to two supports (102); an ultra-thin copper tube (103) is fixedly connected to the two supports (102); a plurality of connecting columns (104) are fixedly connected to the outer wall of the ultra-thin copper tube (103); the other end of the connecting column (104) is fixedly connected to the heat-insulating tube (105); the front and rear ends of the heat-insulating tube (105) are both closed structures; the front and rear inner walls of the heat-insulating tube (105) are fixedly connected to the outer wall of the ultra-thin copper tube (103); the front and rear ends of the ultra-thin copper tube (103) are both fixedly connected to the first fixed tube (106) in a through-type manner.

2. The energy-saving cold energy utilization device of the LNG receiving station according to claim 1 is characterized in that: The first liquid extraction component (2) comprises a first liquid extraction pump (201), a first liquid extraction pipe (202) and a first liquid outlet pipe (203); the first liquid extraction pump (201) is fixedly connected to the upper end of the carrier plate (101); the first liquid extraction pipe (202) is fixedly connected to the liquid extraction port of the first liquid extraction pump (201); the first liquid outlet pipe (203) is fixedly connected to the liquid outlet port of the first liquid extraction pump (201); the other end of the first liquid extraction pipe (202) passes through the outer wall of the heat preservation tube (105) and extends to the inner wall of the heat preservation tube (105).

3. The energy-saving cold energy utilization device of the LNG receiving station according to claim 2 is characterized in that: The first cold storage assembly (3) comprises a first box (301), a heat preservation tank (302), a heat preservation block (303), a screw hole (304), a cover (305), a handle (306) and a first threaded column (307); the upper end of the bearing plate (101) is fixedly connected to the first box (301); the lower end surface of the inner wall of the first box (301) is fixedly connected to the heat preservation tank (302); a plurality of heat preservation blocks (303) are movably provided on the outer wall of the heat preservation tank (302); a screw hole (304) is provided on the upper end of the heat preservation block (303); a cover (305) is movably provided on the upper ends of the plurality of heat preservation blocks (303); the outer wall of the cover (305) is in contact with the inner wall of the first box (301); the cover A handle (306) is fixedly connected to the upper end of the cover (305); first threaded columns (307) are threadedly installed at the four corners of the upper and lower ends of the cover (305); the lower end of the first threaded column (307) is threadedly installed on the inner wall of the screw hole (304); a second fixed pipe (308) is threadedly fixedly connected to the inner and outer walls of the insulation tank (302); the other end of the second fixed pipe (308) passes through the first box (301) and extends to the outside of the first box (301); a second solenoid valve (309) is arranged on the second fixed pipe (308); the other end of the first liquid outlet pipe (203) passes through the outer wall of the first box (301) and the insulation tank (302) and extends to the inner wall of the insulation tank (302).

4. The energy-saving cold energy utilization device of the LNG receiving station according to claim 1 is characterized in that: The mounting assembly (4) comprises a third fixed tube (401), a fixed tank (402), a first inner tube (403), a second inner tube (404), a mounting cover (405), a liquid injection tube (406) and a first solenoid valve (407); the third fixed tube (401) is fixedly connected to the upper end of the heat preservation tube (105); the fixed tank (402) is fixedly connected to the upper end of the third fixed tube (401); the first inner tube (403) and the second inner tube (404) are fixedly connected to the lower end surface of the inner wall of the fixed tank (402); the mounting cover (405) is threadedly mounted on the inner wall of the upper end of the fixed tank (402); the liquid injection tube (406) is fixedly connected to the center of the upper and lower ends of the mounting cover (405); A first electromagnetic valve (407) is fixedly arranged on the liquid injection pipe (406).

5. The energy-saving cold energy utilization device of the LNG receiving station according to claim 1 is characterized in that: The second liquid extraction component (5) comprises a second liquid extraction pump (501), a second liquid extraction pipe (502) and a second liquid outlet pipe (503); the second liquid extraction pump (501) is fixedly connected to the upper end of the carrier plate (101); the second liquid extraction pipe (502) is fixedly connected to the liquid extraction port of the second liquid extraction pump (501); the other end of the second liquid extraction pipe (502) passes through the outer wall of the heat preservation tube (105) and extends to the inner wall of the heat preservation tube (105); the second liquid outlet pipe (503) is fixedly connected to the liquid outlet port of the second liquid extraction pump (501).

6. The energy-saving cold energy utilization device of the LNG receiving station according to claim 5 is characterized in that: The second cold storage assembly (6) comprises a second box body (601), a bearing frame (602), a movable cover (603) and a second threaded column (604); the upper end of the bearing plate (101) is fixedly connected to the second box body (601); the upper part of the inner wall of the second box body (601) is fixedly connected to the bearing frame (602); the upper end of the bearing frame (602) is movably provided with a movable cover (603); the second threaded column (604) is threadedly installed at the four corners of the upper and lower ends of the movable cover (603); the lower end of the second threaded column (604) passes through the movable cover (603) and is threadedly installed in the wall layer of the bearing frame (602); the other end of the second liquid outlet pipe (503) passes through the outer wall of the second box body (601) and extends to the inner wall of the second box body (601).

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