LNG (Liquefied Natural Gas) cold energy recovery system

Abstract

The utility model discloses an LNG cold energy recovery system relates to LNG cold energy recovery technical field, including LNG cold energy circulation storage pry and LNG cooler, the LNG cooler is provided on the one side of LNG cold energy circulation storage pry, the one side of the interior of LNG cold energy circulation storage pry is provided with PLC control cabinet, one side of PLC control cabinet is provided with ethylene glycol storage box, the other side of PLC control cabinet is provided with the LNG cold energy circulation storage pry, the LNG cold energy circulation storage pry is provided with the LNG cold energy circulation storage pry, and the LNG cold energy circulation storage pry is provided with the LNG cold energy circulation storage pry. A compressed air system is arranged on one side of the ethylene glycol storage box, a small electric hoist is fixedly arranged at the upper end of the interior of the ethylene glycol storage box, and an ice making frame is hung on the lower side of the small electric hoist; one side of the PLC control cabinet is electrically connected with a control room fan, and one side of the PLC control cabinet is further electrically connected with a control room environment temperature detection module. According to the LNG cooler, the cooling function can be achieved on the basis that an original LNG pipeline of a gasification station is not changed, in addition, the cooler can achieve module block design, and the number of the LNG coolers can be selected according to the cooling capacity needed on site.

Description

Technical Field

[0001] The utility model relates to the technical field of LNG cold energy recovery, in particular to an LNG cold energy recovery system. Background Art

[0002] Although LNG application technology is already very mature, LNG cold energy recovery is not widely used in my country, and LNG cold energy recovery has become more important. Utility Model Content

[0003] In view of the above-mentioned problems, the present utility model is proposed.

[0004] Therefore, the purpose of the utility model is to provide an LNG cold energy recovery system to achieve LNG cold energy recovery.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] An LNG cold energy recovery system comprises an LNG cold energy circulation storage skid and an LNG cooler, wherein the LNG cooler is arranged on one side of the LNG cold energy circulation storage skid, a PLC control cabinet is arranged on one side of the interior of the LNG cold energy circulation storage skid, an ethylene glycol storage box is arranged on one side of the PLC control cabinet, a compressed air system is arranged on one side of the ethylene glycol storage box, a small electric hoist is fixedly arranged on the upper end of the interior of the ethylene glycol storage box, and an ice-making rack is suspended on the lower side of the small electric hoist;

[0007] One side of the PLC control cabinet is electrically connected to a control room fan, and one side of the PLC control cabinet is also electrically connected to a control room environment temperature detection module.

[0008] Preferably, the PLC control cabinet is integrated with a single ice-making mode button, a dual-mode button, a power-on button, a power-off button, an alarm reset button and an ESD button.

[0009] Preferably, one side of the PLC control cabinet is electrically connected to a main power line.

[0010] Preferably, a control room lighting lamp is provided on the upper side of the compressed air system, and the control room lighting lamp is electrically connected to the PLC control cabinet.

[0011] Preferably, an ice-making room lighting lamp is provided on the upper side of the ethylene glycol storage box, and the ice-making room lighting lamp is electrically connected to the PLC control cabinet.

[0012] Preferably, a first lighting switch is provided between the control room lighting and the PLC control cabinet.

[0013] Preferably, a second lighting switch is provided between the ice-making chamber lighting and the PLC control cabinet.

[0014] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0015] 1. The utility model, when the ice making mode is selected, two ethylene glycol pumps are one on and one on standby, and a temperature transmitter TT01 is arranged on the ethylene glycol. When the temperature of the ethylene glycol box is higher than -20°C, the ethylene glycol circulation pump is automatically turned on to realize cooling.

[0016] 2. The utility model starts the dual mode, in which one of the ethylene glycol pumps realizes the cold cycle, and the other pump realizes the external circulation. The cold ethylene glycol in the external circulation can be used for factory cooling or cold storage. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0018] Figure 1 This is a structural schematic diagram of an LNG cold energy recovery system proposed by the utility model.

[0019] Description of reference numerals:

[0020] 1. LNG cold energy circulation storage skid; 2. LNG cooler; 3. PLC control cabinet; 4. Main power cord; 5. Ethylene glycol storage box; 6. Compressed air system; 7. Control room fan; 8. Control room ambient temperature detection module; 9. Control room lighting; 10. Ice-making room lighting; 11. First lighting switch; 12. Second lighting switch; 13. Small electric hoist; 14. Ice-making rack. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0022] The utility model embodiment discloses an LNG cold energy recovery system.

[0023] Reference Figure 1, an LNG cold energy recovery system, comprising an LNG cold energy circulation storage skid 1 and an LNG cooler 2, the LNG cooler 2 being arranged at one side of the LNG cold energy circulation storage skid 1, a PLC control cabinet 3 being arranged at one side of the interior of the LNG cold energy circulation storage skid 1, a single ice-making mode button, a dual-mode button, a power-on button, a shutdown button, an alarm reset button and an ESD button being integrated on the PLC control cabinet 3, a main power line 4 being electrically connected to one side of the PLC control cabinet 3, capable of supplying power to the PLC control cabinet 3, an ethylene glycol storage box 5 being arranged at one side of the PLC control cabinet 3, a compressed air system 6 being arranged at one side of the ethylene glycol storage box 5, a small electric hoist 13 being fixedly arranged at the upper end of the interior of the ethylene glycol storage box 5, an ice-making rack 14 being suspended at the lower side of the small electric hoist 13;

[0024] One side of the PLC control cabinet 3 is electrically connected to a control room fan 7 , and one side of the PLC control cabinet 3 is also electrically connected to a control room environment temperature detection module 8 .

[0025] Reference Figure 1 A control room lighting lamp 9 is arranged on the upper side of the compressed air system 6, and the control room lighting lamp 9 is electrically connected to the PLC control cabinet 3, so as to illuminate the compressed air system 6. A first lighting switch 11 is arranged between the control room lighting lamp 9 and the PLC control cabinet 3, so as to conveniently control the control room lighting lamp 9. An ice-making room lighting lamp 10 is arranged on the upper side of the ethylene glycol storage box 5, and the ice-making room lighting lamp 10 is electrically connected to the PLC control cabinet 3, so as to illuminate the ice-making room 10. A second lighting switch 12 is arranged between the ice-making room lighting lamp 10 and the PLC control cabinet 3, so as to conveniently control the ice-making room lighting lamp 10.

[0026] In the utility model, when in use, 1 minute after startup in the cooling state, when TTO2-TTO3 is less than 5 degrees, it is judged that LNG has no flow rate or the cooling is saturated, and the cooling is stopped; 1 minute after startup, when TTO3 is less than -45 degrees, it is judged that the cooling is saturated, and the cooling is stopped; 1 minute after startup, when TT01 is greater than -20 degrees, it is judged that the cooling capacity is insufficient, and the cooling is started; when HTT is greater than 25 degrees, it is judged that the control room temperature is too high, and air cooling is executed; 1 minute before stopping the cooling, after closing the preceding pneumatic valve for 5S, open the solenoid valve to execute purging for 15S; 5S after startup, if PTO1 or 02 is less than 0.1MPa, it is judged that the pump working state is abnormal, the cooling is stopped, and an alarm signal is issued; ESD is photographed, the power supply of the two water pumps is stopped, and air purging is executed for 15S.

[0027] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An LNG cold energy recovery system, comprising an LNG cold energy circulation storage skid (1) and an LNG cold extractor (2), characterized in that: The LNG cooler (2) is arranged on one side of the LNG cold energy circulation storage skid (1); a PLC control cabinet (3) is arranged on one side of the interior of the LNG cold energy circulation storage skid (1); an ethylene glycol storage box (5) is arranged on one side of the PLC control cabinet (3); a compressed air system (6) is arranged on one side of the ethylene glycol storage box (5); a small electric hoist (13) is fixedly arranged on the upper end of the interior of the ethylene glycol storage box (5); an ice-making rack (14) is suspended on the lower side of the small electric hoist (13); One side of the PLC control cabinet (3) is electrically connected to a control room fan (7), and one side of the PLC control cabinet (3) is also electrically connected to a control room ambient temperature detection module (8).

2. The LNG cold energy recovery system according to claim 1, characterized in that: The PLC control cabinet (3) is integrated with a single ice-making mode button, a dual-mode button, a start button, a stop button, an alarm reset button and an ESD button.

3. The LNG cold energy recovery system according to claim 1, characterized in that: One side of the PLC control cabinet (3) is electrically connected to a main power line (4).

4. The LNG cold energy recovery system according to claim 1, characterized in that: A control room lighting lamp (9) is arranged on the upper side of the compressed air system (6), and the control room lighting lamp (9) is electrically connected to the PLC control cabinet (3).

5. The LNG cold energy recovery system according to claim 1, characterized in that: An ice-making room lighting lamp (10) is arranged on the upper side of the ethylene glycol storage box (5), and the ice-making room lighting lamp (10) is electrically connected to the PLC control cabinet (3).

6. The LNG cold energy recovery system according to claim 4, characterized in that: A first lighting switch (11) is provided between the control room lighting lamp (9) and the PLC control cabinet (3).

7. The LNG cold energy recovery system according to claim 1, characterized in that: A second lighting switch (12) is provided between the ice-making chamber lighting lamp (10) and the PLC control cabinet (3).

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