CN204648828U - Natural gas liquefaction methane refrigeration systems associated - Google Patents
Natural gas liquefaction methane refrigeration systems associated Download PDFInfo
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- CN204648828U CN204648828U CN201520186850.5U CN201520186850U CN204648828U CN 204648828 U CN204648828 U CN 204648828U CN 201520186850 U CN201520186850 U CN 201520186850U CN 204648828 U CN204648828 U CN 204648828U
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Abstract
The utility model relates to natural gas processing technical field, disclose a kind of natural gas liquefaction methane refrigeration systems associated, comprise the methane heat exchanger, methane compressor suction tank, methane compressor, methane cooler, propylene refrigeration system, ethylene refrigeration system and the methane storage tank that connect successively, wherein, described methane compressor suction tank is connected with the one-level entrance of methane compressor, and described methane storage tank is also communicated with methane heat exchanger.After employing natural gas liquefaction methane refrigeration systems associated of the present utility model, its entirety has simple, the stable advantage of structure.
Description
Technical field
The utility model relates to natural gas processing technical field, more particularly, and particularly a kind of natural gas liquefaction methane refrigeration systems associated.
Background technology
In natural gas processing process, first gas need through carbonization treatment, and then by liquefaction precooling treatment, finally enter heavy hydrocarbon scrubbing tower again and carry out de-heavy hydrocarbon process.De-heavy hydrocarbon is generally by the process of heavy hydrocarbon scrubbing tower, and the methane gas produced in de-heavy hydrocarbon processing procedure needs further to be processed by methane refrigeration systems associated.And how to design simple, the stable natural gas liquefaction methane refrigeration systems associated of a kind of structure be one of direction of studying of those skilled in the art.
Utility model content
The purpose of this utility model is the natural gas liquefaction methane refrigeration systems associated providing a kind of structure simple, stable.
In order to achieve the above object, the technical solution adopted in the utility model is as follows:
A kind of natural gas liquefaction methane refrigeration systems associated, comprise the methane heat exchanger, methane compressor suction tank, methane compressor, methane cooler, propylene refrigeration system, ethylene refrigeration system and the methane storage tank that connect successively, wherein, described methane compressor suction tank is connected with the one-level entrance of methane compressor, and described methane storage tank is also communicated with methane heat exchanger.
Preferably, also comprise methane interstage cooler, described methane interstage cooler is connected between the output of methane compressor and its input secondary inlet.
Preferably, the rotational speed regulation module be connected with the motor of methane compressor is also comprised.
Preferably, the bottom of described methane compressor suction tank is also furnished with multiple hot blow pipeline.
Compared with prior art, the utility model has the advantage of: the utility model in use, first enter methane compressor suction tank carry out gas-liquid separation from methane heat exchanger out-100 DEG C, 0.12MPa.g low-pressure gaseous cryogen, enter methane compressor to prevent the liquid that may occur.Low-pressure gaseous cryogen after separatory enters the one-level entrance of methane compressor, be compressed to about 0.745MPa.g, first be as cold as 40 DEG C through methane interstage cooler, then the secondary inlet of methane compressor is entered, methane cryogen is compressed to 4.4MPa.g, 40 DEG C are cooled to through methane cooler, enter the propylene refrigeration system and ethylene refrigeration system that are made up of the evaporimeter of 7 different evaporation potential temperatures more successively, high-pressure gaseous cryogen is cooled, condensation, cross after being chilled to-96 DEG C and enter liquid methane storage tank, liquid methane enters methane heat exchanger, cross in methane heat exchanger after being chilled to-155 DEG C and extract out from methane heat exchanger again, through the throttling of J-T valve to 140KPa.g, after-158.9 DEG C, return in methane heat exchanger, for LNG, methane cryogen self provides cold, realize the refrigerant cycle of methane refrigeration systems associated.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the frame diagram of natural gas liquefaction methane refrigeration systems associated described in the utility model.
Fig. 2 is the structural representation of natural gas liquefaction methane refrigeration systems associated described in the utility model.
Description of reference numerals: 100, methane heat exchanger, 200, methane compressor suction tank, 300, methane compressor, 400, methane interstage cooler, 500, methane cooler, 600, propylene refrigeration system, 700, ethylene refrigeration system, 800, methane storage tank, 900, rotational speed regulation module.
Detailed description of the invention
Below in conjunction with accompanying drawing, preferred embodiment of the present utility model is described in detail, to make advantage of the present utility model and feature can be easier to be readily appreciated by one skilled in the art, thus more explicit defining is made to protection domain of the present utility model.
Consult shown in Fig. 1 and Fig. 2, the utility model provides a kind of natural gas liquefaction methane refrigeration systems associated, comprise the methane heat exchanger 100, methane compressor suction tank 200, methane compressor 300, methane cooler 500, propylene refrigeration system 600, ethylene refrigeration system 700 and the methane storage tank 800 that connect successively, wherein, described methane compressor suction tank 200 is connected with the one-level entrance of methane compressor 300, and described methane storage tank 800 is also communicated with methane heat exchanger 100.
This practicality newly also comprises methane interstage cooler 400, and described methane interstage cooler 400 is connected between the output of methane compressor 300 and its input secondary inlet.
As preferably, for the ease of regulating the operating efficiency of methane compressor 300, the utility model also comprises the rotational speed regulation module 900 be connected with the motor of methane compressor 300.
As preferably, the utility model is also furnished with multiple hot blow pipeline in the bottom of described methane compressor suction tank 200.This be due to: from methane heat exchanger 100, re-heat is to the low-pressure methane refrigerant temperature of-100 DEG C more than dew point, and normal do not exist liquid when running.And when after device longtime running, methane refrigerant components supplements will bring the heavy constituents such as a small amount of ethane, propane into, meeting condensation in methane compressor suction tank 200, the hot blow pipeline now can opened bottom methane compressor suction tank 200 carries out hot blow to pot liquid, is impelled that liquid refrigerant is vaporized, cryogen reenters systemic circulation by heating.
Principle of the present utility model is: in use, first enter methane compressor suction tank 200 carry out gas-liquid separation from methane heat exchanger 100 out-100 DEG C, 0.12MPa.g low-pressure gaseous cryogen, enter methane compressor 300 to prevent the liquid that may occur.Low-pressure gaseous cryogen after separatory enters the one-level entrance of methane compressor 300, be compressed to about 0.745MPa.g, first be as cold as 40 DEG C through methane interstage cooler 400, then the secondary inlet of methane compressor 300 is entered, methane cryogen is compressed to 4.4MPa.g, 40 DEG C are cooled to through methane cooler 500, enter the propylene refrigeration system and ethylene refrigeration system that are made up of the evaporimeter of 7 different evaporation potential temperatures more successively, high-pressure gaseous cryogen is cooled, condensation, cross after being chilled to-96 DEG C and enter liquid methane storage tank 800, liquid methane enters methane heat exchanger 100, cross in methane heat exchanger 100 after being chilled to-155 DEG C and extract out from methane heat exchanger 100 again, through the throttling of J-T valve to 140KPa.g, after-158.9 DEG C, return in methane heat exchanger 100, for LNG, methane cryogen self provides cold, realize the refrigerant cycle of methane refrigeration systems associated.And after employing natural gas liquefaction methane refrigeration systems associated of the present utility model, its entirety has simple, the stable advantage of structure.
Although describe embodiment of the present utility model by reference to the accompanying drawings; but patent owner can make various distortion or amendment within the scope of the appended claims; as long as be no more than the protection domain described by claim of the present utility model, all should within protection domain of the present utility model.
Claims (4)
1. a natural gas liquefaction methane refrigeration systems associated, it is characterized in that: comprise the methane heat exchanger (100), methane compressor suction tank (200), methane compressor (300), methane cooler (500), propylene refrigeration system (600), ethylene refrigeration system (700) and the methane storage tank (800) that connect successively, wherein, described methane compressor suction tank (200) is connected with the one-level entrance of methane compressor (300), and described methane storage tank (800) is also communicated with methane heat exchanger (100).
2. natural gas liquefaction methane refrigeration systems associated according to claim 1, it is characterized in that: also comprise methane interstage cooler (400), described methane interstage cooler (400) is connected between the output of methane compressor (300) and its input secondary inlet.
3. natural gas liquefaction methane refrigeration systems associated according to claim 1, is characterized in that: also comprise the rotational speed regulation module (900) be connected with the motor of methane compressor (300).
4. natural gas liquefaction methane refrigeration systems associated according to claim 1, is characterized in that: the bottom of described methane compressor suction tank (200) is also furnished with multiple hot blow pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520186850.5U CN204648828U (en) | 2015-03-31 | 2015-03-31 | Natural gas liquefaction methane refrigeration systems associated |
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| CN201520186850.5U CN204648828U (en) | 2015-03-31 | 2015-03-31 | Natural gas liquefaction methane refrigeration systems associated |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110173960A (en) * | 2019-06-28 | 2019-08-27 | 正和集团股份有限公司 | A kind of recycle device and technique of hydrogen-rich gas |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110173960A (en) * | 2019-06-28 | 2019-08-27 | 正和集团股份有限公司 | A kind of recycle device and technique of hydrogen-rich gas |
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