CN221036941U - Precooling device for coalbed methane cold box - Google Patents
Precooling device for coalbed methane cold box Download PDFInfo
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- CN221036941U CN221036941U CN202322560896.6U CN202322560896U CN221036941U CN 221036941 U CN221036941 U CN 221036941U CN 202322560896 U CN202322560896 U CN 202322560896U CN 221036941 U CN221036941 U CN 221036941U
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- cavity
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- air inlet
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 70
- 239000007788 liquid Substances 0.000 claims abstract description 27
- 239000003507 refrigerant Substances 0.000 claims abstract description 23
- 239000003245 coal Substances 0.000 claims abstract description 10
- 239000000110 cooling liquid Substances 0.000 claims description 3
- 239000007789 gas Substances 0.000 abstract description 16
- 230000005494 condensation Effects 0.000 abstract description 6
- 238000009833 condensation Methods 0.000 abstract description 6
- 239000003949 liquefied natural gas Substances 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000001816 cooling Methods 0.000 description 12
- 239000003345 natural gas Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000035 biogenic effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
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- Separation By Low-Temperature Treatments (AREA)
Abstract
The utility model discloses a precooling device of a coalbed methane cold box, which belongs to the technical field of liquefied natural gas production, and comprises a shell, wherein an air inlet cavity, a condensing cavity and an air outlet cavity which are independently arranged are sequentially arranged in the shell; the coalbed methane input pipe is arranged on one side of the shell and is communicated with the air inlet cavity; the coal bed gas discharge pipe is arranged on the other side of the shell and is communicated with the gas outlet cavity; the condensing tube is arranged in the condensing cavity, the air inlet end of the condensing tube is communicated with the air inlet cavity, and the air outlet end of the condensing tube is communicated with the air outlet cavity; the refrigerant liquid inlet pipe is arranged at the lower side of the shell and is communicated with the condensation cavity; the refrigerant drain pipe is arranged at one side of the shell far away from the refrigerant liquid inlet pipe and is communicated with the condensation cavity. According to the utility model, the communicating pipe is arranged between the air inlet cavity and the air outlet cavity, so that when the temperature cannot meet the set temperature, the air can enter the communicating pipe to be cooled again, and the precooling efficiency is improved.
Description
Technical Field
The utility model belongs to the technical field of liquefied natural gas production, and particularly relates to a precooling device of a coal bed methane cold box.
Background
Natural gas is deposited in underground porous formations, including oilfield gas, gas field gas, coalbed gas, mudguard gas, and biogenic gas, to name a few.
At present, in the liquefaction process of natural gas, raw natural gas is required to be pretreated, enters a liquefaction system at a certain flow, and then is subjected to cooling processes such as precooling, liquefaction, supercooling and the like in the liquefaction system.
For the precooling operation of natural gas, for example, the application number is 202220321609.9, and the patent name is Chinese patent utility model 'a liquefied natural gas cold box precooling device', which discloses that 'a baffle divides the box body into an air cooling cavity and a water cooling cavity from left to right in sequence, the air cooling cavity is internally provided with the air cooling precooling device, the water cooling cavity is internally provided with the water cooling precooling device', the precooling effect is improved by firstly air cooling and then water cooling, meanwhile, the gradual cooling of the liquefied natural gas is realized, and the phenomenon that when the precooling liquid temperature is too low and the precooling is directly performed, the temperature difference of the outer surface of a liquefied gas output pipe is too large to crack is avoided.
However, the residence time of the liquefied gas in the equipment is short, resulting in low final heat exchange efficiency, so that a precooling device for a coalbed methane cold box for improving the precooling efficiency is urgently needed.
Disclosure of utility model
The utility model mainly aims to provide a precooling device for a coalbed methane cold box, which aims to solve the problem of low heat exchange efficiency in the prior art.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
a coalbed methane cold box precooling apparatus, comprising:
The shell is internally provided with an air inlet cavity, a condensing cavity and an air outlet cavity which are independently arranged in sequence;
The coalbed methane input pipe is arranged on one side of the shell and is communicated with the air inlet cavity;
The coal bed gas discharge pipe is arranged at one side of the shell, which is far away from the coal bed gas input pipe, and is communicated with the gas outlet cavity;
The condensing tube is arranged in the condensing cavity, the air inlet end of the condensing tube is communicated with the air inlet cavity, and the air outlet end of the condensing tube is communicated with the air outlet cavity;
the refrigerant liquid inlet pipe and the refrigerant liquid outlet pipe are respectively arranged on the shell and are positioned on two opposite sides of the shell;
the first end of the communicating pipe is communicated with the air outlet cavity, the second end of the communicating pipe is communicated with the air inlet cavity, and a circulating pump is arranged on the communicating pipe;
The temperature sensor is arranged in the air outlet cavity, a first electromagnetic valve is arranged on the communicating pipe, and a second electromagnetic valve is arranged on the coal bed gas discharge pipe.
Further, the outer surface of the condensation pipe is provided with radiating fins.
Further, the condensing tube is a coiled tube.
Further, the air inlet of the condensing tube is positioned at the upper end of the air outlet of the condensing tube, the refrigerant liquid inlet tube is arranged at the lower end of the shell, and the refrigerant liquid outlet tube is arranged at the upper end of the shell.
Further, an input pump is arranged on the coalbed methane input pipe, and a precooling liquid pump is arranged on the refrigerant liquid inlet pipe.
Further, a control panel is arranged on the shell, and the first electromagnetic valve, the second electromagnetic valve, the input pump, the circulating pump and the precooling liquid pump are all electrically connected with the control panel.
The utility model has the beneficial effects that:
According to the utility model, the communicating pipe is arranged between the air inlet cavity and the air outlet cavity, so that when the temperature cannot meet the set temperature, the air can enter the communicating pipe to be cooled again, and the precooling efficiency is improved.
Drawings
Fig. 1 is a schematic structural diagram of a precooling apparatus for a coalbed methane cold box.
In the figure: 1. a housing; 2. a coalbed methane input pipe; 3. an input pump; 4. an air inlet cavity; 5. a condensing chamber; 6. a condensing tube; 7. a fin; 8. a refrigerant liquid inlet pipe; 9. a precooling liquid pump; 10. a refrigerant liquid outlet pipe; 11. an air outlet cavity; 12. a coal bed gas discharge pipe; 13. a communicating pipe; 14. a first electromagnetic valve; 15. a temperature sensor; 16. a second electromagnetic valve; 17. and a circulation pump.
Detailed Description
It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.
Example 1
Referring to fig. 1, a pre-cooling device for a coalbed methane cold box includes:
the device comprises a shell 1, wherein an air inlet cavity 4, a condensation cavity 5 and an air outlet cavity 11 which are independently arranged are sequentially arranged in the shell 1;
the coalbed methane input pipe 2 is arranged on one side of the shell 1 and is communicated with the air inlet cavity 4;
A coalbed methane discharge pipe 12, wherein the coalbed methane discharge pipe 12 is arranged at one side of the shell 1 far away from the coalbed methane input pipe 2 and is communicated with the air outlet cavity 11;
The condensing tube 6 is arranged in the condensing cavity 5, the air inlet end of the condensing tube 6 is communicated with the air inlet cavity 4, and the air outlet end of the condensing tube 6 is communicated with the air outlet cavity 11;
A refrigerant liquid inlet pipe 8 and a refrigerant liquid outlet pipe 10 which are communicated with the condensation cavity 5, wherein the refrigerant liquid inlet pipe 8 and the refrigerant liquid outlet pipe 10 are respectively arranged on the shell 1 and are positioned on two opposite sides of the shell 1;
A communicating pipe 13, a first end of the communicating pipe 13 is communicated with the air outlet cavity 11, a second end of the communicating pipe 13 is communicated with the air inlet cavity 4, and a circulating pump 17 is arranged on the communicating pipe 13;
The temperature sensor 15, temperature sensor 15 sets up in the air-out chamber 11, is provided with first solenoid valve 14 on communicating pipe 13, is provided with second solenoid valve 16 on the coal bed gas discharge pipe 12.
In the present embodiment, the outer surface of the condensation duct 6 is provided with heat radiating fins 7.
In this embodiment, the condenser tube 6 is a serpentine tube.
By adopting the coiled pipe for the condensing pipe 6, the contact area with air can be increased, and the condensing effect can be improved.
In this embodiment, the air inlet of the condenser tube 6 is located at the upper end of the air outlet of the condenser tube 6, the refrigerant liquid inlet tube 8 is disposed at the lower end of the housing 1, and the refrigerant liquid outlet tube 10 is disposed at the upper end of the housing 1.
In this embodiment, an input pump 3 is disposed on the coalbed methane input pipe 2, and a precooling liquid pump 9 is disposed on the refrigerant liquid inlet pipe 8.
In this embodiment, a control panel is provided on the housing 1, and the first solenoid valve 14, the second solenoid valve 16, the input pump 3, the circulation pump 17, and the pre-cooling liquid pump 9 are all electrically connected to the control panel.
During specific implementation, the input pump 3 and the pre-cooling liquid pump 9 are manually opened, so that the coalbed methane is input through the coalbed methane input pipe 2, the coalbed methane is output into the output cavity along the condensing pipe 6, the refrigerant is input into the condensing cavity 5, when the temperature sensor 15 detects that the temperature is higher than a set value, the first electromagnetic valve 14 and the circulating pump 17 on the communicating pipe 13 are simultaneously opened, the second electromagnetic valve 16 and the input pump 3 on the coalbed methane discharge pipe 12 are closed, the coalbed methane enters the condensing pipe 6 again for cooling, when the temperature is lower than the set value, the second electromagnetic valve 16 and the input pump 3 on the coalbed methane discharge pipe 12 are simultaneously opened, the first electromagnetic valve 14 and the circulating pump 17 on the communicating pipe 13 are closed, and the coalbed methane is discharged.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model are included in the protection scope of the present utility model.
Claims (6)
1. A coalbed methane cold box precooling apparatus, comprising:
The shell is internally provided with an air inlet cavity, a condensing cavity and an air outlet cavity which are independently arranged in sequence;
The coalbed methane input pipe is arranged on one side of the shell and is communicated with the air inlet cavity;
The coal bed gas discharge pipe is arranged at one side of the shell, which is far away from the coal bed gas input pipe, and is communicated with the gas outlet cavity;
The condensing tube is arranged in the condensing cavity, the air inlet end of the condensing tube is communicated with the air inlet cavity, and the air outlet end of the condensing tube is communicated with the air outlet cavity;
the refrigerant liquid inlet pipe and the refrigerant liquid outlet pipe are respectively arranged on the shell and are positioned on two opposite sides of the shell;
the first end of the communicating pipe is communicated with the air outlet cavity, the second end of the communicating pipe is communicated with the air inlet cavity, and a circulating pump is arranged on the communicating pipe;
The temperature sensor is arranged in the air outlet cavity, a first electromagnetic valve is arranged on the communicating pipe, and a second electromagnetic valve is arranged on the coal bed gas discharge pipe.
2. The coalbed methane cooler bin precooling apparatus as claimed in claim 1, wherein the outer surface of the condenser tube is provided with radiating fins.
3. A coalbed methane cold box precooling apparatus as claimed in claim 2 wherein the condensing tube is a serpentine tube.
4. A coalbed methane cold box precooling device as claimed in claim 3 wherein the air inlet of the condenser tube is located at the upper end of the air outlet of the condenser tube, the refrigerant liquid inlet tube is arranged at the lower end of the shell, and the refrigerant liquid outlet tube is arranged at the upper end of the shell.
5. The apparatus of claim 1, wherein the coalbed methane input pipe is provided with an input pump, and the refrigerant liquid inlet pipe is provided with a precooling liquid pump.
6. The apparatus of claim 5, wherein a control panel is disposed on the housing, and the first solenoid valve, the second solenoid valve, the input pump, the circulation pump, and the pre-cooling liquid pump are all electrically connected to the control panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322560896.6U CN221036941U (en) | 2023-09-20 | 2023-09-20 | Precooling device for coalbed methane cold box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322560896.6U CN221036941U (en) | 2023-09-20 | 2023-09-20 | Precooling device for coalbed methane cold box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221036941U true CN221036941U (en) | 2024-05-28 |
Family
ID=91187507
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322560896.6U Active CN221036941U (en) | 2023-09-20 | 2023-09-20 | Precooling device for coalbed methane cold box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221036941U (en) |
-
2023
- 2023-09-20 CN CN202322560896.6U patent/CN221036941U/en active Active
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