CN111828835A - Method for setting automatic pressure increasing valve of low-temperature liquefied gas storage tank - Google Patents

Method for setting automatic pressure increasing valve of low-temperature liquefied gas storage tank Download PDF

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Publication number
CN111828835A
CN111828835A CN202010570244.9A CN202010570244A CN111828835A CN 111828835 A CN111828835 A CN 111828835A CN 202010570244 A CN202010570244 A CN 202010570244A CN 111828835 A CN111828835 A CN 111828835A
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CN
China
Prior art keywords
valve
storage tank
automatic
filling
pressure increasing
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Pending
Application number
CN202010570244.9A
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Chinese (zh)
Inventor
王宝贵
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Individual
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Individual
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Priority to CN202010570244.9A priority Critical patent/CN111828835A/en
Publication of CN111828835A publication Critical patent/CN111828835A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/04—Arrangement or mounting of valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
    • F17C13/025—Special adaptations of indicating, measuring, or monitoring equipment having the pressure as the parameter
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C3/00—Vessels not under pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0107—Single phase
    • F17C2223/013—Single phase liquid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04—Indicating or measuring of parameters as input values
    • F17C2250/0404—Parameters indicated or measured
    • F17C2250/043—Pressure

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

The invention discloses a method for setting an automatic booster valve of a low-temperature liquefied gas storage tank, and belongs to the technical field of low-temperature gas production. A pressure gauge is additionally arranged at a proper position on a pipeline between the automatic pressure increasing valve of the storage tank and the filling and discharging valve, and the automatic pressure increasing valve is arranged by operating the corresponding valve on the storage tank and according to the indication value of the pressure gauge. The invention mainly solves the defects that the time consumption is long when the tank body is pressurized and decompressed for many times, gas is wasted and a large amount of noise is generated during decompression, the setting value of the automatic pressure boosting valve is relatively inaccurate and the like in the process of setting the automatic pressure boosting valve in the conventional low-temperature liquefied gas storage tank. The automatic pressure increasing valve is arranged without a method of increasing and releasing pressure of the tank body for multiple times, and has the characteristics of short setting time, almost no waste of gas, no noise, relatively more accurate setting of the automatic pressure increasing valve and the like.

Description

Method for setting automatic pressure increasing valve of low-temperature liquefied gas storage tank
Technical Field
The invention relates to a setting method of an automatic booster valve of a low-temperature liquefied gas storage tank, belonging to the technical field of low-temperature gas production.
Background
When a new liquefied gas storage tank is put into use for gas supply or after the automatic pressure increasing valve of the storage tank is maintained, the automatic pressure increasing valve needs to be set or calibrated according to the working pressure of the storage tank, so that when the pressure in the storage tank is lower than the set pressure of the automatic pressure increasing valve, the automatic pressure increasing valve is opened to increase the pressure of the storage tank, and when the pressure in the storage tank is higher than the set pressure of the automatic pressure increasing valve, the automatic pressure increasing valve is gradually closed, and the storage tank is ensured to maintain the required working pressure during operation.
Under the present condition, the automatic pressure increasing valve of the low-temperature liquefied gas storage tank is mainly set by performing pressure increasing operation and pressure releasing operation on the storage tank for many times and according to the indication value of a pressure gauge of the storage tank. According to the existing setting method, the storage tank needs to be pressurized and decompressed for multiple times, and due to the influences of the storage tank volume, the working pressure of the storage tank, the liquid level in the storage tank, the operation proficiency of an operator and other factors, a large amount of time is consumed in the process of repeatedly pressurizing and decompressing the storage tank, and a large amount of gas and a large amount of noise are wasted when the storage tank is decompressed.
Under the current situation, most operators record the indication value of a pressure gauge on a storage tank as a set value of the pressure increasing valve when a pipeline at the front end of the automatic pressure increasing valve is frosted, and the set value of the pressure increasing valve of the storage tank obtained by the method is relatively inaccurate due to the size of the volume of the storage tank, the working pressure of the storage tank and the experience of the operators.
When the automatic pressure increasing valve of the storage tank is arranged by the existing method, the problems that the time of the arrangement process is long, the gas is wasted due to the repeated pressure relief of the storage tank, a large amount of noise is generated during the pressure relief of the storage tank, the setting value of the automatic pressure increasing valve is relatively inaccurate, and the like can be caused.
Disclosure of Invention
The invention mainly solves the defects of long time of the setting process, waste of gas during pressure relief, generation of a large amount of noise during pressure relief, relatively inaccurate setting of the automatic pressure increasing valve and the like of the traditional low-temperature liquefied gas storage tank in the setting process of the automatic pressure increasing valve, and provides a method for setting the automatic pressure increasing valve of the storage tank without increasing and relieving the pressure of the tank body for multiple times.
The technical problem of the invention is mainly solved by the following technical scheme:
the invention relates to a method for setting an automatic booster valve of a low-temperature liquefied gas storage tank, which comprises a gas phase root valve 1, a liquid phase root valve 2, an automatic booster valve 3, a booster 4, a top filling valve 5, a filling one-way valve 6, a bottom filling valve 7, a filling and discharging valve 8, a pipeline safety valve 9, a filling joint 10, a storage tank vent valve 11, a storage tank liquid lifting valve 12, a storage tank safety valve 13, a storage tank pressure gauge 14, a low-temperature liquefied gas storage tank 15, an additional pressure gauge 16 and the like. Firstly, the indication value of the pressure gauge 14 of the storage tank is confirmed to be higher than the target setting value of the automatic pressurization valve 3, and if the indication value is low, the storage tank can be pressurized in a tank car filling or manual mode. Close storage tank gaseous phase root valve 1 and bottom filling valve 7, pressurize through operation storage tank liquid phase root valve 2, operation fills 8 pressure reliefs of discharge valve, so that 3 rear end pressure of automatic pressure increasing valve, it is very little for storage tank 15 volume to fill between discharge valve 8 to consider the pipeline volume of automatic pressure increasing valve 3 rear end, be convenient for quick step-up or step-down, observe additional manometer 16 indicating value at the pressure rising and falling in-process, can set up fast and verify automatic pressure increasing valve 3's value, consider that the pipeline volume is little, additional manometer 16 can respond to the change of pressure in the pipeline rapidly, therefore obtain 3 setting values of relatively accurate automatic pressure increasing valve.
The invention can achieve the following effects: compared with the prior art, the setting method of the automatic booster valve of the low-temperature liquefied gas storage tank has the advantages that the setting process time is short, gas is hardly wasted, noise is not generated, and the setting value of the automatic booster valve is relatively accurate.
Drawings
FIG. 1 is a schematic diagram of a typical cryogenic tank.
FIG. 2 is a schematic diagram of an embodiment of the present invention.
FIG. 3 is a schematic flow diagram of an embodiment of the present invention.
In the figure, 1, a gas phase root valve, 2, a liquid phase root valve, 3, an automatic booster valve, 4, a booster, 5, a top filling valve, 6, a filling single-phase valve, 7, a bottom filling valve, 8, a filling discharge valve, 9, a pipeline safety valve, 10, a filling joint, 11, a storage tank vent valve, 12, a storage tank liquid lifting valve, 13, a storage tank safety valve, 14, a storage tank pressure gauge, 15, a low-temperature storage tank and 16, additional pressure gauges are arranged.
Detailed Description
Hereinafter, embodiments of the present invention will be described in detail. However, the present invention may be practiced by installing multiple types of pressure indicating devices at different locations in the conduit at the back end of the auto booster valve to monitor the pressure in the conduit and to regulate different valves, and should not be construed as limited to the specific embodiments set forth herein. Rather, the embodiments are provided to explain the principles of the invention and its practical application to thereby enable others skilled in the art to understand the invention.
The invention provides a method for setting an automatic pressurization valve of a low-temperature storage tank, which comprises the following steps.
Step A: confirming that the indication of the tank pressure gauge 14 is above the target setting for the auto-pressurizing valve 3, if low, the following adjustment may be made.
1. When the product tank car fills the storage tank with liquid, the pressure of the storage tank can be adjusted by operating the filling valves at the top and the bottom of the storage tank.
2. The starting pressure value of the automatic pressurization valve 3 can be adjusted to be the maximum on site, and the gas phase root valve 1 and the liquid phase root valve 2 are manually operated to carry out pressurization.
And B: an additional pressure gauge 16 is added at the inlet line of the safety valve K.
And C: closing the gas phase root valve 1, the liquid phase root valve 2, the bottom filling valve 7, opening the top filling valve 5, the filling and discharging valve 8, and emptying the pressure of the pipeline at the rear end of the automatic pressurization valve 3.
And D, slightly opening the liquid phase root valve 2 and slowly closing the charging and discharging valve 8, and closing the liquid phase root valve 2 and the charging and discharging valve 8 when the two valves are adjusted to ensure that the indication value of the additional pressure gauge 16 is the same as the target setting value of the automatic pressure increasing valve 3.
Step E, slightly opening the liquid phase root valve 2 and observing whether the value indicated by the additional pressure gauge 16 is increased or unchanged.
1. When the additional pressure gauge 16 shows a rise: at the moment, the current setting value of the automatic pressure increasing valve 3 is larger than the target setting value of the pressure increasing valve, the filling and discharging valve 8 is slightly opened at the moment, the opening degrees of the liquid phase root valve 2 and the filling and discharging valve 8 are adjusted, the indication value of the additional pressure gauge 16 tends to be stable, the setting value rod of the automatic pressure increasing valve 3 is slowly adjusted, the setting value of the automatic pressure increasing valve 3 is reduced, and the indication value of the additional pressure gauge 16 is equal to the target setting value of the automatic pressure increasing valve.
2. When the value of the additional pressure gauge 16 is kept unchanged: at the moment, the setting value of the automatic pressure increasing valve 3 is smaller than or equal to the target starting pressure value of the automatic pressure increasing valve, the filling and discharging valve 8 is slightly opened at the moment, and the opening degrees of the liquid phase root valve 2 and the filling and discharging valve 8 are adjusted, so that the indication value of the additional pressure gauge 16 tends to be stable, if the indication value of the additional pressure gauge 16 is smaller than the target setting value of the automatic pressure increasing valve 3, the setting rod of the automatic pressure increasing valve 3 is slowly adjusted, the current setting value of the automatic pressure increasing valve 3 is increased, and the indication value of the additional pressure gauge.
And F, verifying the starting value of the automatic pressurization valve 3.
And (3) adjusting the opening degrees of the liquid phase root valve 2 and the filling and discharging valve 8 so that the indication value of the additional pressure gauge 16 is equal to the target setting value of the pressure increasing valve 3, closing the liquid phase root valve 2, slightly adjusting the filling and discharging valve 8, and closing the filling and discharging valve 8 after the indication value of the additional pressure gauge 16 is kept constant. Slightly open the liquid phase root valve 2 and observe that the additional pressure gauge 16 should be unchanged, otherwise repeat step E.

Claims (3)

1. The invention relates to a method for setting an automatic booster valve of a low-temperature liquefied gas storage tank, which comprises a gas phase root valve (1), a liquid phase root valve (2), an automatic booster valve (3), a booster (4), a top filling valve (5), a bottom filling valve (7), a storage tank pressure gauge (14) and a low-temperature liquefied gas storage tank (15), and is characterized in that: an additional pressure gauge (16) is additionally arranged at a proper position of a pipeline between the automatic pressure increasing valve (3) and the filling and discharging valve (8) for displaying the pressure change between the automatic pressure increasing valve (3) and the filling and discharging valve (8), the bottom filling valve (7) is closed by the gas phase root valve (1), and the low-temperature liquefied gas storage tank (15) forms a pressure increasing valve setting channel through the liquid phase root valve (2), the automatic pressure increasing valve (3), the pressure increasing device (4), the top filling valve (5), the filling and discharging valve (6) and the additional pressure gauge (16).
2. The setting method of the automatic booster valve of the cryogenic liquefied gas storage tank according to claim 1, characterized in that: an additional pressure gauge (16) is arranged on the inlet pipeline of the safety valve of the pipeline between the automatic pressure increasing valve (3) and the charging and discharging valve (8), and can also be arranged on the charging joint (10) when the pipeline is not provided with the independent charging check valve (6).
3. The setting method of the automatic booster valve of the cryogenic liquefied gas storage tank according to claim 1, characterized in that: the low-temperature liquefied gas storage tank (15) forms a booster valve setting channel through the liquid phase root valve (2), the automatic booster valve (3), the booster (4), the top filling valve (5), the filling discharge valve (6) and the additional pressure gauge (16), the pressure in the pipeline between the two valves is adjusted by operating the liquid phase root valve (2) and the filling discharge valve (6), the pressure is displayed through the additional pressure gauge (16), the automatic booster valve is set according to the indication value of the additional pressure gauge (16), and the gas in the pipeline is finally discharged to the outside through the filling discharge valve (6).
CN202010570244.9A 2020-06-22 2020-06-22 Method for setting automatic pressure increasing valve of low-temperature liquefied gas storage tank Pending CN111828835A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010570244.9A CN111828835A (en) 2020-06-22 2020-06-22 Method for setting automatic pressure increasing valve of low-temperature liquefied gas storage tank

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Application Number Priority Date Filing Date Title
CN202010570244.9A CN111828835A (en) 2020-06-22 2020-06-22 Method for setting automatic pressure increasing valve of low-temperature liquefied gas storage tank

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CN111828835A true CN111828835A (en) 2020-10-27

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1752507A (en) * 2005-09-23 2006-03-29 河南中原绿能高科有限责任公司 Pressure control device for liquefied natural gas storage tank
EP2762715A1 (en) * 2011-09-28 2014-08-06 Mitsubishi Heavy Industries, Ltd. Direct fuel injection diesel engine apparatus
CN105118536A (en) * 2015-08-18 2015-12-02 中国人民解放军陆军军官学院 Adjustable charge-discharge type high temperature and high pressure helium gas experimental system and method
CN105927852A (en) * 2016-07-15 2016-09-07 程同刚 Natural gas unloading method
CN207349787U (en) * 2017-09-26 2018-05-11 黎明化工研究设计院有限责任公司 A kind of automatic filling system for high-purity tungsten hexafluoride production
CN110307369A (en) * 2019-07-09 2019-10-08 福建福清核电有限公司 A kind of operated micropressure adjusting valve off-line setting calculation device and method

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1752507A (en) * 2005-09-23 2006-03-29 河南中原绿能高科有限责任公司 Pressure control device for liquefied natural gas storage tank
EP2762715A1 (en) * 2011-09-28 2014-08-06 Mitsubishi Heavy Industries, Ltd. Direct fuel injection diesel engine apparatus
CN105118536A (en) * 2015-08-18 2015-12-02 中国人民解放军陆军军官学院 Adjustable charge-discharge type high temperature and high pressure helium gas experimental system and method
CN105927852A (en) * 2016-07-15 2016-09-07 程同刚 Natural gas unloading method
CN207349787U (en) * 2017-09-26 2018-05-11 黎明化工研究设计院有限责任公司 A kind of automatic filling system for high-purity tungsten hexafluoride production
CN110307369A (en) * 2019-07-09 2019-10-08 福建福清核电有限公司 A kind of operated micropressure adjusting valve off-line setting calculation device and method

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Application publication date: 20201027