CN112303769A

CN112303769A - LNG cold energy recycling and storing device

Info

Publication number: CN112303769A
Application number: CN202011277696.4A
Authority: CN
Inventors: 岳伟; 沈卫兵; 徐海; 白文超; 王辉
Original assignee: Enric Bengbu Compressor Co ltd
Current assignee: Enric Bengbu Compressor Co ltd
Priority date: 2020-11-16
Filing date: 2020-11-16
Publication date: 2021-02-02

Abstract

The invention provides an LNG cold energy recycling and storing device, which comprises a box body (1) and a cooler (5), and is characterized in that: a first space (6) and a second space (7) are arranged in the box body (1), a refrigeration assembly (2) and a cold taking device (5) are arranged in the first space (6) and are connected and matched, and a control cabinet (3) correspondingly matched with the refrigeration assembly (2) is arranged in the second space (7). The invention utilizes the glycol solution to recover the cold energy in the LNG through the heat exchange with the LNG cold energy and utilizes the cold energy to make ice, and the made ice blocks are convenient to move, so that the ice blocks can be suitable for more occasions and the cold energy of the ice blocks is utilized to the maximum extent; the double modes of ice making and refrigeration can be realized, and the temperature of a factory building and industrial equipment can be reduced while ice making is realized; compared with the direct discharge of LNG cold energy, the method realizes energy conservation and emission reduction and reduces refrigeration cost.

Description

LNG cold energy recycling and storing device

The technical field is as follows:

the invention relates to LNG cold energy recovery, in particular to an LNG cold energy recycling and storing device.

Background art:

in nearly ten years, the LNG application technology is rapidly developed in China, and the LNG industry with Chinese characteristics is established and becomes an important component of the energy field in China; although the LNG application technology is mature, LNG cold energy recovery is not widely applied in China; with the national emphasis on resources and environmental problems, the recovery of LNG cold energy becomes more important; if the waste heat is not recycled, a great deal of energy waste is caused.

The invention content is as follows:

the invention aims to overcome the defects in the prior art and provides an LNG cold energy recycling and storing device.

The application provides the following technical scheme:

the utility model provides a LNG cold energy circulation recovery storage device, it includes the box and gets cold ware, its characterized in that: the refrigerator is characterized in that a first space and a second space are arranged in the box body, a refrigeration assembly is arranged in the first space, a control cabinet correspondingly matched with the refrigeration assembly is arranged in the second space, and the refrigeration assembly is connected with a cold taking device on the outer side of the box body through a pipeline in a matched mode.

On the basis of the technical scheme, the following further technical scheme can be provided:

and an air compressor correspondingly matched with the refrigerating assembly is arranged in the second space.

The refrigeration assembly comprises a glycol storage box, an ice making frame is arranged in the glycol storage box, a group of ice making boxes are arranged on the ice making frame, a first conveying pipe penetrates through the glycol storage box, and the other end of the first conveying pipe extends out of the box body after penetrating through a second space and is communicated with a liquid outlet of the cold taking device; a group of first spray pipes, a group of second spray pipes and a group of third spray pipes are communicated with the first conveying pipe in the ethylene glycol storage tank respectively;

still wear to be equipped with second conveyer pipe and third conveyer pipe on the ethylene glycol storage box, be equipped with on second conveyer pipe in the second space and the third conveyer pipe and correspond complex second pump body and third pump body, the intercommunication has the parallel connection pipe on second conveyer pipe and third conveyer pipe, the intercommunication has back the liquid pipe on parallel connection pipe, back liquid pipe and get cold ware inlet intercommunication.

The parallel connection pipe is also communicated with an external circulation assembly, the external circulation assembly comprises a return pipe communicated with a liquid return pipe, one end of the return pipe extends out of the box body to be communicated with the heat exchange device, a first valve body matched correspondingly is arranged on the return pipe outside the box body, a second return pipe is further communicated between the heat exchange device and the ethylene glycol storage box, and a second valve body matched correspondingly is arranged on the second return pipe.

The invention has the advantages that:

the invention utilizes the glycol solution to recover the cold energy in the LNG through the heat exchange with the LNG cold energy and utilizes the cold energy to make ice, and the made ice blocks are convenient to move, so that the ice blocks can be suitable for more occasions and the cold energy of the ice blocks is utilized to the maximum extent; the double modes of ice making and refrigeration can be realized, and the temperature of a factory building and industrial equipment can be reduced while ice making is realized; compared with the direct discharge of LNG cold energy, the method realizes energy conservation and emission reduction and reduces refrigeration cost.

Description of the drawings:

FIG. 1 is a perspective view of the housing of the present invention;

FIG. 2 is a schematic overall perspective view of the present invention;

FIG. 3 is a flow chart of the present invention.

The specific implementation mode is as follows:

as shown in fig. 1-3, the LNG cold energy recycling storage device includes a tank 1, and a cold extractor 5 is installed on an LNG pipeline 8 on one side outside the tank 1. The box body 1 is a container.

A partition board 1a is arranged in the box body 1, the box body 1 is divided into a first space 6 and a second space 7 through the partition board 1a, and a ventilation fan 1b communicating the first space 6 and the second space 7 is arranged at the upper part of the partition board 1 a. The area of the first space 6 is larger than the area of the second space 7.

A second opening door 1e is arranged on the box body 1 at one side of the second space 7, and a ventilation grid plate 1d is also arranged on the box body 1 above the second opening door 1 e. A first door 6a is provided on the case 1 on one side of the first space 6. The first opening door 6a and the second opening door 1e allow the worker to enter the corresponding first space 6 and second space 7, respectively. Lamps for illumination are installed in both the first space 6 and the second space 7.

The first space 6 is internally provided with a refrigeration assembly 2, the refrigeration assembly 2 comprises an ethylene glycol storage box 2h, the ethylene glycol storage box 2h is of a rectangular groove structure, an ice making frame 2a is erected at the groove opening, a group of symmetrically distributed ice making boxes 2d are erected on the ice making frame 2a, the ice making boxes 2d are of a rectangular structure, and the bottom faces of the boxes downwards extend into the ethylene glycol storage box.

The bottom of the ethylene glycol storage box 2h below the ice making box 2d is provided with a first conveying pipe 2c in a penetrating mode, one end of the first conveying pipe 2c is provided with a first spray pipe 2b in an inserting mode through a tee joint, and the first spray pipe 2b and the first conveying pipe 2c form a T-shaped structural distribution.

The other end of the first conveying pipe 2c penetrates through the second space 7 and then extends out of the box body 1 to be communicated with a liquid outlet of the cooler 5. A flow rate detector, not shown in the drawing, is further provided on the first delivery pipe 2c in the glycol storage tank 2 h.

The pipe body of the first conveying pipe 2c between the first spray pipe 2b and the partition plate 1a is also communicated with a group of second spray pipes 2e and a group of third spray pipes 2k, the second spray pipes 2e and the third spray pipes 2k are respectively distributed on two sides of the first conveying pipe 2c, and the second spray pipes 2e and the third spray pipes 2k are mutually distributed in a staggered mode. And a group of spray holes with upward openings are formed in the pipe walls of the first spray pipe 2b, the second spray pipe 2e and the third spray pipe 2 k.

A second delivery pipe 2f and a third delivery pipe 2m are further perforated on the glycol storage tank 2h at one side of the first delivery pipe 2c, and one ends of the second delivery pipe 2f and the third delivery pipe 2m extend into the second space 7 through the partition plate 1 a. And a second pump body 2n and a third pump body 2j which are correspondingly matched are arranged on the second delivery pipe 2f and the third delivery pipe 2m in the second space 7.

The outlet ends of the second conveying pipe 2f and the third conveying pipe 2m are communicated with a parallel connecting pipe 2z, a liquid return pipe 2t is communicated with the parallel connecting pipe 2z, and one end of the liquid return pipe 2t extends to the outside of the box body 1 after penetrating through the second space 7 to be communicated with a liquid inlet of the cold taking device 5. One end of the parallel connection pipe is communicated with an external circulation component.

The external circulation component comprises a return pipe 2p, one end of the return pipe is communicated with the parallel connection pipe 2z, one end of the return pipe 2p extends out of the box body 1 to be communicated with a cold quantity inlet of the heat exchange device 9 positioned on other working sections, and a first valve body 9c which is correspondingly matched with the return pipe 2p between the box body 1 and the heat exchange device 9 is arranged on the return pipe. A second return pipe 9a is communicated between the heat exchange device 9 and the glycol storage tank 2h, and a second valve body 9b which is correspondingly matched with the second return pipe 9a is arranged on the second return pipe 9 a. The first valve body 9c and the second valve body 9b are electromagnetic valves.

Be equipped with switch board 4, room temperature sensor 1c and air compressor machine 3 in second space 7, the intercommunication has trachea 3a on the gas outlet of air compression 3, and the one end of trachea 3a communicates with the liquid return pipe 2t that is close to get cold ware 5, is equipped with corresponding complex valve 3b on trachea 3 a. The valve 3b is also an electromagnetic valve, and the air tube 3a is located in the second space 7.

The control cabinet 3 forms electric signal connection cooperation with the ventilating fan 1b, the room temperature sensor 1c, the air compressor 3, the valve 3b, the second pump body 2n, the third pump body 2j, the first valve body 9c, the second valve body 9b and the flow detector through cables.

The working process is as follows:

the glycol solution displaces the LNG pipeline 8 from the extracted cold energy through the cold extractor 5, then flows into the first conveying pipe 2c through a liquid outlet of the cold extractor 5, then enters the glycol storage box 2h and is upwards sprayed out from the first spray pipe 2b, the second spray pipe 2e and the third spray pipe 2k, the cold energy is released to freeze water in the ice making box 2d, and the glycol solution after the cold energy is released flows back into the cold extractor 5 through the second conveying pipe 2f and the return pipe 2p and the return pipe 2t to be subjected to cold energy displacement. The circulation of the glycol solution can be realized only by controlling the second pump body 2n to be opened by the control cabinet. The worker may enter the first space through the first opening door 6a to collect ice in the ice making housing 2d or add water to the ice making housing 2 d.

When room temperature sensor 1c detects that the temperature in second space 7 exceeds 25 degrees centigrade, send a signal to the switch board, at this moment switch board control ventilating fan 1b opens, carry out taking a breath between first space 6 and the second space 7, reduce the temperature in the second space 7, wait when the temperature in the second space 7 is less than 20 degrees centigrade, the switch board sends a signal again, and switch board control ventilating fan 1b closes.

When the heat exchange devices 9 at other working sections need to work, a worker enters the second space 7 to operate the control cabinet, then the third pump body 2j, the first valve body 9c and the second valve body 9b are opened, a part of glycol solution is conveyed to the heat exchange devices 9 through the return pipe 2p to release cold, and the glycol solution after releasing the cold flows back to the glycol storage tank 2h through the second return pipe 9 a.

When the cold taking device 5 does not work, a worker enters the second space 7 to operate the control cabinet to close the second pump body 2n, the third pump body 2j, the first valve body 9c and the second valve body 9 b. Then start air compressor machine 3, open valve 3b through the switch board for the air current gets into through liquid return pipe 2t and gets remaining ethylene glycol solution ejecting in the cooler 5, in the first conveyer pipe 2c inflow ethylene glycol storage box 2h, when the fluid that the flow detector does not detect flows, sends the signal to the switch board, and switch board control air compressor machine 3 and valve 3b close.

Claims

1. The utility model provides a LNG cold energy circulation recovery storage device, it includes box (1) and gets cold ware (5), its characterized in that: be equipped with first space (6) and second space (7) in box (1), be equipped with refrigeration subassembly (2) in first space (6), be equipped with in second space (7) and correspond complex switch board (3) with refrigeration subassembly (2), refrigeration subassembly (2) are connected the complex through pipeline and refrigerator (5) in the box (1) outside.

2. An LNG cold energy recycling storage device according to claim 1, wherein: an air compressor (3) correspondingly matched with the refrigerating assembly (2) is arranged in the second space (7).

3. An LNG cold energy recycling storage device according to claim 1, wherein: the refrigeration assembly (2) comprises a glycol storage box (2 h), an ice making frame (2 a) is arranged in the glycol storage box (2 h), a group of ice making boxes (2 d) are arranged on the ice making frame (2 a), a first conveying pipe (2 c) penetrates through the glycol storage box (2 h), and the other end of the first conveying pipe (2 c) penetrates through a second space (7) and then extends out of the box body (1) to be communicated with a liquid outlet of the refrigerator (5); a group of first spray pipes (2 b), a group of second spray pipes (2 e) and a group of third spray pipes (2 k) are communicated with the first conveying pipe (2 c) in the ethylene glycol storage box (2 h);

still wear to be equipped with second conveyer pipe (2 f) and third conveyer pipe (2 m) on ethylene glycol storage box (2 h), be equipped with on second conveyer pipe (2 f) and third conveyer pipe (2 m) in second space (7) and correspond complex second pump body (2 n) and third pump body (2 j), the intercommunication has parallel connection pipe on second conveyer pipe (2 f) and third conveyer pipe (2 m), the intercommunication has liquid return pipe (2 t) on parallel connection pipe, liquid return pipe (2 t) and cold extractor (5) inlet intercommunication.

4. An LNG cold energy recycling, recovering and storing device as claimed in claim 3, characterized in that: the parallel pipe on still communicate and have the extrinsic cycle subassembly, the extrinsic cycle subassembly include back flow (2 p) with liquid return pipe (2 t) intercommunication, the one end of back flow (2 p) stretches out box (1) and heat transfer device (9) intercommunication, is equipped with on back flow (2 p) in the box (1) outside and corresponds first valve body (9 c) of complex, still communicates between heat transfer device (9) and ethylene glycol storage box (2 h) has second back flow (9 a), is equipped with on second back flow (9 a) and corresponds complex second valve body (9 b).