CN113586292A - Gas pressure stabilizing and adjusting system and adjusting method thereof - Google Patents
Gas pressure stabilizing and adjusting system and adjusting method thereof Download PDFInfo
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- CN113586292A CN113586292A CN202110768247.8A CN202110768247A CN113586292A CN 113586292 A CN113586292 A CN 113586292A CN 202110768247 A CN202110768247 A CN 202110768247A CN 113586292 A CN113586292 A CN 113586292A
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- 238000000034 method Methods 0.000 title claims abstract description 12
- 230000000087 stabilizing effect Effects 0.000 title claims abstract description 9
- 239000006200 vaporizer Substances 0.000 claims abstract description 45
- 238000010438 heat treatment Methods 0.000 claims abstract description 43
- 238000002309 gasification Methods 0.000 claims abstract description 28
- 230000001105 regulatory effect Effects 0.000 claims description 20
- 230000033228 biological regulation Effects 0.000 claims description 17
- 230000008016 vaporization Effects 0.000 claims description 9
- 238000012544 monitoring process Methods 0.000 claims description 6
- 238000009834 vaporization Methods 0.000 claims description 5
- 239000007788 liquid Substances 0.000 abstract description 17
- 239000007789 gas Substances 0.000 description 137
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 10
- 230000001276 controlling effect Effects 0.000 description 7
- 239000003949 liquefied natural gas Substances 0.000 description 7
- 239000003921 oil Substances 0.000 description 5
- 239000000110 cooling liquid Substances 0.000 description 4
- 239000010720 hydraulic oil Substances 0.000 description 4
- 239000003345 natural gas Substances 0.000 description 4
- 230000002528 anti-freeze Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- -1 methane Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0203—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels characterised by the type of gaseous fuel
- F02M21/0215—Mixtures of gaseous fuels; Natural gas; Biogas; Mine gas; Landfill gas
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/0221—Fuel storage reservoirs, e.g. cryogenic tanks
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/023—Valves; Pressure or flow regulators in the fuel supply or return system
- F02M21/0239—Pressure or flow regulators therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/0287—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers characterised by the transition from liquid to gaseous phase ; Injection in liquid phase; Cooling and low temperature storage
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention provides a gas pressure stabilizing and adjusting system and an adjusting method thereof, wherein a hydraulic station of a hydraulic system is communicated with a gas cylinder, a heating gasification system is communicated with a vaporizer, the gas cylinder is communicated with the vaporizer through a low-temperature pump, the vaporizer is communicated with an engine through a first high-pressure pipeline, a buffer tank is arranged on the first high-pressure pipeline, a second electromagnetic valve is arranged between the buffer tank and the engine, a second high-pressure pipeline is also arranged, two ends of the second high-pressure pipeline are connected in parallel with two ends of the second electromagnetic valve, a fourth electromagnetic valve and a high-frequency electromagnetic valve are sequentially arranged on the second high-pressure pipeline, the fourth electromagnetic valve and the high-frequency electromagnetic valve are communicated with an emptying pipe through a fifth electromagnetic valve, the vaporizer is communicated with the emptying pipe through a third safety valve, the gas cylinder and the vaporizer are arranged in a gas cylinder room, and the gas cylinder is communicated with the emptying pipe through the first safety valve. The liquid gas is pumped out and gasified, the stability of the gas pressure in the pipeline is controlled by controlling the quantity of the pumped liquid gas and the gasification quantity of the gas, and the gas is delivered to an end user.
Description
Technical Field
The invention relates to the field of gas pressure stabilization, in particular to a gas pressure stabilization regulating system and a regulating method thereof.
Background
Liquefied Natural Gas (LNG) is mainly composed of hydrocarbons such as methane, has good emission performance after combustion, is a high-efficiency, high-quality, clean energy, has abundant reserves and low cost, is widely concerned, and can be used as a fuel for gas engines. During transportation and storage, natural gas is stored in cryogenic liquid form in storage tanks. In the actual use process, the vaporizer in the supply system heats and vaporizes the liquefied natural gas stored at low temperature, converts the liquefied natural gas into a state meeting the requirement of an engine, and transmits the liquefied natural gas into a cylinder for combustion. The pressure in the gas pitcher mainly relies on parts such as manual regulation pressure boost governing valve, economic governing valve to maintain in certain within range, but in normal use, because ambient temperature's difference, need frequently stop the manual regulation above-mentioned pressure boost governing valve of manual regulation and economic governing valve and accomplish the adjustment of gas pitcher pressure, handle untimely or when the operation cooperation is unreasonable, can appear the gas pitcher pressure too high or the condition of crossing excessively, lead to engine gas consumption height, power not enough scheduling problem.
Chinese patent CN112145301A, a pressure regulation and control method for an LNG tank, the LNG tank and an engine, wherein the method comprises the following steps: s1, acquiring the ambient temperature by the ECU; s2, setting a target value of the gas tank pressure according to the environment temperature; s3, setting the driving duty ratio of the pressurization regulating valve according to the difference value between the air tank pressure target value and the current air tank pressure value; s4, judging whether the driving duty ratio of the pressurization regulating valve is not larger than a lower limit threshold value or not, or judging whether the driving duty ratio of the pressurization regulating valve is not smaller than an upper limit threshold value or not, and if not, regulating the pressure of the gas tank by the pressurization regulating valve according to the driving duty ratio; otherwise, the driving duty ratio of the economic regulating valve is set and the gas tank pressure is regulated according to the current gas tank pressure value and the gas tank pressure target value. This kind of regulation mode is comparatively complicated, and the effect of adjusting pressure is poor.
Disclosure of Invention
The invention mainly aims to provide a gas pressure stabilizing and adjusting system and a gas pressure stabilizing and adjusting method, which solve the problems that the gas tank pressure is adjusted by manually adjusting the pressure increasing adjusting valve and the economic adjusting valve when frequent parking, and the gas tank pressure is too high or too low when the treatment is not timely or the operation and the matching are unreasonable, so that the gas consumption of an engine is high, the power is insufficient and the like.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a gas pressure stabilizing and adjusting system comprises a hydraulic system and a heating gasification system, wherein a hydraulic station of the hydraulic system is communicated with a gas cylinder, the heating gasification system is communicated with a vaporizer, the gas cylinder is communicated with the vaporizer through a low-temperature pump, the vaporizer is communicated with an engine through a first high-pressure pipeline, a buffer tank is arranged on the first high-pressure pipeline, a second electromagnetic valve is arranged between the buffer tank and the engine, a second high-pressure pipeline is further arranged, two ends of the second high-pressure pipeline are connected in parallel with two ends of the second electromagnetic valve, a fourth electromagnetic valve and a high-frequency electromagnetic valve are sequentially arranged on the second high-pressure pipeline, and the fourth electromagnetic valve and the high-frequency electromagnetic valve are communicated with an emptying pipe through a fifth electromagnetic valve;
the vaporizer is communicated with the emptying pipe through a third safety valve;
the gas cylinder and the vaporizer are arranged in the gas cylinder room, and the gas cylinder is communicated with the emptying pipe through a first safety valve.
In the preferred scheme, the gas cylinder is communicated with the carburetor through a second safety valve, the second safety valve is communicated with the emptying pipe, and a first needle valve is further arranged on one side of the second safety valve.
In the preferred scheme, the vaporizer communicates with the buffer tank through a first solenoid valve, and a fifth ball valve is arranged on one side of the first solenoid valve, and a first pressure gauge is arranged on one side of the fifth ball valve.
In the preferred scheme, a pressure sensor and a temperature sensor are arranged between the first electromagnetic valve and the buffer tank, the pressure sensor and the temperature sensor are electrically connected with a collection card, and the collection card is electrically connected with a monitoring computer.
In the preferred scheme, a gas consumption instrument is arranged between the buffer tank and the second electromagnetic valve and electrically connected with the acquisition card, a sixth ball valve is arranged between the second electromagnetic valve and the engine, and a second pressure gauge is arranged on one side of the sixth ball valve.
In the preferred scheme, a ninth ball valve and a tenth ball valve are arranged on the second high-pressure pipeline, the ninth ball valve is arranged on one side of the fourth electromagnetic valve, and the tenth ball valve is arranged on one side of the high-frequency electromagnetic valve.
In the preferred scheme, a fifth electromagnetic valve is communicated with an emptying pipe through a second needle valve, and a third one-way valve is arranged between the second needle valve and the fifth electromagnetic valve.
In the preferred scheme, the first electromagnetic valve is communicated with the buffer tank through a plurality of branches and an emptying pipe, the first branch is communicated with the emptying pipe through a fourth safety valve, and the second branch is communicated with the emptying pipe through a third electromagnetic valve, a seventh ball valve and a first one-way valve in sequence;
the third branch is communicated with the emptying pipe through an eighth ball valve and a second one-way valve in sequence.
In a preferred scheme, the heating gasification system comprises a heater, and the heater is communicated with the vaporizer to form a circulating pipeline.
The method comprises the following steps:
s1, the liquefied gas in the gas cylinder is pumped into a vaporizer in a heating and vaporizing system by a cryogenic pump to be vaporized, and the liquefied gas is completely vaporized by a heater and the vaporizer and then is sent into a first high-pressure pipeline;
s2, monitoring the internal pressure of the first high-pressure pipeline constantly by the pressure sensor, and if the pressure of the first high-pressure pipeline does not reach a set pressure value, feeding back the pressure to the control system to control the hydraulic system and the heating gasification system to continue working until the pressure reaches a preset value;
s3, if the pressure of the pressure sensor reaches a preset value, feeding back the pressure to the control system, stopping the work of the hydraulic system and the heating gasification system, and maintaining the stable pressure in the first high-pressure pipeline;
s4, when the system selects to use the first high-pressure pipeline, the fourth electromagnetic valve and the high-frequency electromagnetic valve on the second high-pressure pipeline are closed, the pressure in the pipeline is kept stable in a constant pressure range, and because the system does not have a secondary regulation function, if the pressure is required to be changed, the internal pressure of the system needs to be changed by matching with the exhaust of an engine, and the working conditions of the hydraulic system and the heating system are regulated and controlled in real time according to the pressure sensor;
s5, when the system selects to use the second high-pressure pipeline, the second electromagnetic valve on the first high-pressure pipeline is closed, after the pressure value is set, if the pressure is reduced, the control system controls the opening and closing of the fifth electromagnetic valve to discharge the redundant gas;
if the pressure in the second high-pressure pipeline is higher than the set pressure, the hydraulic system and the heating system are controlled to work according to the feedback condition of the pressure sensor.
The invention provides a gas pressure stabilizing and adjusting system and an adjusting method thereof, wherein liquid gas is pumped and gasified, the stability of the gas pressure in a pipeline is controlled by controlling the quantity of pumped liquid gas and the gasification quantity of gas, and the gas pressure is conveyed to a terminal user. The pressure sensor detects the gas pressure in the buffer tank in real time, feeds back and adjusts the working states of the hydraulic system and the heating gasification system, and maintains the stability of the pressure of the gas internal system.
Drawings
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
FIG. 1 is a block diagram of the overall system of the present invention;
FIG. 2 is a block diagram of the first and second high pressure piping systems of the present invention;
FIG. 3 is a bottom view of the overall appearance of the present invention;
FIG. 4 is a flow chart of a first high pressure branch pressure control of the present invention;
FIG. 5 is a flow chart of a second high-pressure line pressure control of the present invention;
in the figure: a hydraulic station 1; a gas cylinder 2; a first safety valve 3; a first check valve 4; a second check valve 5; a second needle valve 6; a third check valve 7; a fifth electromagnetic valve 8; an engine 9; a heater 10; a first ball valve 11; a second ball valve 12; a sixth electromagnetic valve 13; a vaporizer 14; a third ball valve 15; a fourth ball valve 16; a second relief valve 17; a first needle valve 18; a third relief valve 19; a fourth relief valve 20; a seventh ball valve 21; an eighth ball valve 22; a third electromagnetic valve 23; a ninth ball valve 24; a fourth electromagnetic valve 25; a high-frequency electromagnetic valve 26; a tenth ball valve 27; a second high-pressure line 28; a first natural gas sensor 29; a first pressure gauge 30; a fifth ball valve 31; a first solenoid valve 32; a second natural gas sensor 33; a pressure sensor 34; a temperature sensor 35; an acquisition card 36; a monitoring computer 37; a buffer tank 38; a gas consumption meter 39; a second solenoid valve 40; a sixth ball valve 41; a second pressure gauge 42; a third natural gas sensor 43; a first high-pressure line 44.
Detailed Description
Example 1
As shown in fig. 1 to 5, a gas pressure stabilizing and regulating system comprises a hydraulic system and a heating and gasifying system, wherein a hydraulic station 1 of the hydraulic system is communicated with a gas cylinder 2, the heating and gasifying system is communicated with a vaporizer 14, the gas cylinder 2 is communicated with the vaporizer 14 through a cryogenic pump, the vaporizer 14 is communicated with an engine 9 through a first high-pressure pipeline 44, a buffer tank 38 is arranged on the first high-pressure pipeline 44, a second electromagnetic valve 40 is arranged between the buffer tank 38 and the engine 9, a second high-pressure pipeline 28 is also arranged, two ends of the second high-pressure pipeline 28 are connected in parallel with two ends of the second electromagnetic valve 40, a fourth electromagnetic valve 25 and a high-frequency electromagnetic valve 26 are sequentially arranged on the second high-pressure pipeline 28, the fourth electromagnetic valve 25 and the high-frequency electromagnetic valve 26 are communicated with an emptying pipe through a fifth electromagnetic valve 8, the vaporizer 14 is communicated with the emptying pipe through a third safety valve 19, the gas cylinder 2 and the vaporizer 14 are arranged inside a gas cylinder room, the gas cylinders 2 are communicated with an emptying pipe through a first safety valve 3, and emptying and pressure reduction are carried out between the gas cylinders 2.
The hydraulic system, namely the power supply system, provides a power source for the whole system. The hydraulic station applies hydraulic power to the cryogenic pump to pump out liquefied gas in the gas cylinder 2 and pump the liquefied gas into the whole gas system.
The gas cylinder 2 is communicated with the carburetor 14 through a second safety valve 17, the second safety valve 17 is communicated with an emptying pipe, and a first needle valve 18 is further arranged on one side of the second safety valve 17. The carburetor 14 is communicated with the buffer tank 38 through a first electromagnetic valve 32, a fifth ball valve 31 is arranged on one side of the first electromagnetic valve 32, and a first pressure gauge 30 is arranged on one side of the fifth ball valve 31. A pressure sensor 34 and a temperature sensor 35 are arranged between the first electromagnetic valve 32 and the buffer tank 38, the pressure sensor 34 and the temperature sensor 35 are electrically connected with an acquisition card 36, and the acquisition card 36 is electrically connected with a monitoring computer 37. A gas consumption instrument 39 is arranged between the buffer tank 38 and the second electromagnetic valve 40, the gas consumption instrument 39 is electrically connected with the acquisition card 36, a sixth ball valve 41 is arranged between the second electromagnetic valve 40 and the engine 9, and a second pressure gauge 42 is arranged on one side of the sixth ball valve 41.
The gas cylinder 2 low-temperature pump, the second safety valve 17, the first needle valve 18, the vaporizer 14, the safety valve 3, the first pressure gauge 30, the fifth ball valve 31, the first electromagnetic valve 32, the buffer tank, the vaporizer, the pressure sensor, the 'temperature sensor', the second electromagnetic valve 40, the sixth ball valve 41 and the second pressure gauge 42 jointly form a first high-pressure pipeline 44. The pressure sensor detects the gas pressure in the buffer tank in real time, feeds back and adjusts the working states of the hydraulic system and the heating gasification system, and maintains the stability of the pressure of the gas internal system.
In a preferred embodiment, a ninth ball valve 24 and a tenth ball valve 27 are disposed on the second high-pressure pipeline 28, the ninth ball valve 24 is disposed on one side of the fourth solenoid valve 25, and the tenth ball valve 27 is disposed on one side of the high-frequency solenoid valve 26.
The gas cylinder, the low-temperature pump, the second safety valve 17, the first needle valve 18, the vaporizer, the safety valve 3, the first pressure gauge 30, the fifth ball valve 31, the first electromagnetic valve 32, the buffer tank 38, the gas consumption meter 39, the pressure sensor 34, the temperature sensor 35, the ninth ball valve 24, the fourth electromagnetic valve 25, the high-frequency electromagnetic valve 26, the tenth ball valve 27, the second pressure gauge 42, the fifth electromagnetic valve 8, the third check valve 7 and the second needle valve 6 jointly form a second high-pressure pipeline 28. The internal pressure of the pressure pipeline can be changed and changed at any time and a stable state can be maintained according to the requirement of required pressure, and the internal gas pressure of the engine can be controlled more accurately. The pressure sensor detects the gas pressure in the buffer tank in real time, feeds back and adjusts the working states of the hydraulic system and the heating gasification system, and maintains the stability of the pressure of the gas internal system.
In a preferable scheme, the fifth electromagnetic valve 8 is communicated with an emptying pipe through a second needle valve 6, and a third one-way valve 7 is arranged between the second needle valve 6 and the fifth electromagnetic valve 8.
In a preferable scheme, the first electromagnetic valve 32 is communicated with the buffer tank 38 through a plurality of branches, the first branch is communicated with the emptying pipe through a fourth safety valve 20, the second branch is communicated with the emptying pipe through a third electromagnetic valve 23, a seventh ball valve 21 and a first one-way valve 4 in sequence, the third branch is communicated with the emptying pipe through an eighth ball valve 22 and a second one-way valve 5 in sequence, as shown in the structure shown in fig. 2, the first branch, the second branch and the third branch are sequentially arranged from left to right, the seventh ball valve 21 is a standby valve which can not close the pipeline in order to prevent the electromagnetic valve from being in failure, and the valve is in a normally open state in the system. The first check valve 4 is used for preventing gas inside the emptying pipeline from flowing back into the high-pressure gas pipeline.
The eighth ball valve 22 is used for manually exhausting the internal gas pressure of the high-pressure pipeline. The second check valve 5 is used for avoiding the gas inside the emptying pipeline from flowing back into the high-pressure gas pipeline.
In a preferred embodiment, the heating and gasifying system comprises a heater 10, and the heater 10 is communicated with a vaporizer 14 through a circulation pipeline. As shown in fig. 3, the heating and gasifying system can sufficiently and completely gasify the liquefied gas and raise the temperature of the low-temperature gas to normal temperature to ensure the normal operation of the subsequent components.
The heating gasification system comprises: and the cooling liquid tank provides a container for heating and containing low-temperature antifreeze liquid for the whole heating and gasifying system. The water pump is a pipeline connecting device for connecting the cooling liquid tank and the heating gasification system. The regulating valve is used for regulating the liquid flow in the heating gasification system pipeline, so that the gasification amount of the liquefied gas can be better controlled. The flowmeter detects the flow of liquid in the pipeline and takes over the flow of the pipeline from the feedback strip. The vaporizer is a container for exchanging the temperature of low-temperature gas and high-temperature liquid, and is also a device for controlling the gas vaporization amount. The components, the ball valve and the electromagnetic valve form a liquid circulation loop together, and the gasification and the pressure of the positive gas circuit are controlled together.
Example 2
As described further with reference to embodiment 1, as shown in fig. 1 to 5, the cryopump pumps the liquefied gas in the gas cylinder 2 into the vaporizer 14 in the heating and vaporizing system to prepare for vaporization, and the heater 10 and the vaporizer 14 completely vaporize the liquefied gas and feed it into the first high-pressure line 44.
The pressure inside the first high-pressure pipeline 44 monitored by the pressure sensor 34 at any moment is fed back to the control system to control the hydraulic system and the heating and gasifying system to continue working until the pressure reaches a preset value if the pressure in the first high-pressure pipeline 44 does not reach a set pressure value.
When the pressure of the pressure sensor 34 reaches a predetermined value, the pressure is fed back to the control system, and the operation of the hydraulic system and the heating and vaporizing system is stopped, so that the internal pressure of the first high-pressure line 44 is maintained stable.
When the system selects to use the first high-pressure pipeline 44, the fourth electromagnetic valve 25 and the high-frequency electromagnetic valve 26 on the second high-pressure pipeline 28 are closed, the pressure in the pipeline is kept stable in a constant pressure range, and because the system does not have a secondary regulation function, if the pressure is required to be changed, the internal pressure of the system needs to be changed in cooperation with engine exhaust, and the working conditions of the hydraulic system and the heating system are regulated and controlled in real time according to the pressure sensor.
When the system selects to use the second high-pressure pipeline 28, the second electromagnetic valve 40 on the first high-pressure pipeline 44 is closed, and after the pressure value is set, if the pressure is reduced, the control system controls the opening and closing of the fifth electromagnetic valve 8 to discharge the redundant gas.
If the pressure in the second high-pressure pipeline 28 is higher than the set pressure, the hydraulic system and the heating system are controlled to work according to the feedback condition of the pressure sensor 34.
Example 3
As further described in connection with embodiments 1-2, the hydraulic system, i.e., the power supply system, as shown in fig. 1-5, provides a source of power for the overall system. The hydraulic station 1 applies hydraulic power to the cryogenic pump to pump out liquefied gas in the gas cylinder 2 and pump the liquefied gas into the whole gas system.
The main components of the hydraulic system are as follows:
an oil tank for storing a reservoir of hydraulic oil;
the hydraulic pump is a connecting device of an oil tank and an oil way; the hydraulic oil in the oil tank can be pumped into the oil circuit system, so that the power of the whole system is established.
The motor provides power for the hydraulic pump to drive the hydraulic pump to rotate.
The valve bank comprises a bypass valve and a reversing valve, pressure and flow inside the hydraulic system are adjusted, and the hydraulic system is stabilized.
The air-cooled radiator reduces the temperature rise of hydraulic oil caused by long-term work of a hydraulic system, and improves the working efficiency of the hydraulic oil.
The components, the flowmeter and the filter form a hydraulic loop together, and the internal pressure of the system is regulated and controlled together by regulating the rotating speed of the motor and the flowing direction of the valve.
The heating gasification system can fully and completely gasify the liquefied gas, and the low-temperature gas is heated to normal temperature, so that the normal work of subsequent parts is guaranteed.
The heating gasification system comprises:
and the cooling liquid tank provides a container for heating and containing low-temperature antifreeze liquid for the whole heating and gasifying system.
And the water pump is a pipeline connecting device for connecting the cooling liquid tank and the heating gasification system.
And the regulating valve is used for regulating the liquid flow in the heating and gasifying system pipeline, so that the gasifying amount of the liquefied gas can be better controlled.
The flowmeter is used for detecting the flow of the liquid in the pipeline and takes over the flow of the pipeline from the feedback strip.
The vaporizer is a container for exchanging the temperature of low-temperature gas and high-temperature liquid, and is also a device for controlling the vaporization amount of the gas.
The components, the ball valve and the electromagnetic valve form a liquid circulation loop together, and the gasification and the pressure of the positive gas circuit are controlled together.
And the gas regulation and control system is used for controlling the stability of the internal pressure of the system and controlling the working states of the hydraulic system and the heating gasification system in a feedback manner according to the pressure condition. Thereby maintaining the pressure inside the whole system stable.
A gas cylinder, which is a container storing cryogenic liquefied gas.
The cryogenic pump is arranged in the gas cylinder, can pump out cryogenic liquid in the gas cylinder and is driven into an inlet pipeline of the vaporizer.
And the first safety valve 3 is a gas cylinder safety valve, and the internal pressure of the gas cylinder is maintained not to be too high, so that the safety of the gas cylinder is ensured.
And a second safety valve 17, wherein the second safety valve 17 is a gas pipeline outlet safety valve and ensures the pressure safety of an outlet. Meanwhile, the potential safety hazard caused by the fact that the valve is not opened at the rear end is avoided.
The first needle valve 18, which first needle valve 18 is a control valve for the gas conduit inlet, controls whether there is other access to the positive gas system.
And a vaporizer 14, wherein the vaporizer 14 is a place where heat exchange between the low-temperature gas and the high-temperature liquid is performed, and the vaporization amount of the gas is controlled by the same worker to maintain the rear end pressure of the gas system to be stable.
And a first pressure gauge 30, wherein the first pressure gauge 30 displays the actual pressure condition of the gas at the end of the vaporizer.
And a third ball valve 15, wherein the third ball valve 15 controls the gas in the vaporizer to enter a rear-end gas system, and meanwhile, the front-end gas system can be conveniently disassembled and maintained. This valve is normally open in the system.
And the sixth electromagnetic valve 13 controls the inlet and outlet of the rear-end gas pressure, and is matched with the third ball valve 15 for use, so that the failure rate of manual operation is reduced.
The buffer tank 38 reduces the fluctuation of the internal pressure of the pipeline, and ensures that the gas pressure in the pipeline is more stable.
And a gas consumption meter 39, wherein the gas consumption meter 39 is used for detecting the gas consumption of the rear-end engine.
A second solenoid valve 40, said second solenoid valve 40 controlling the admission of gas to the engine.
And a sixth ball valve 41, wherein the sixth ball valve 41 is matched with the second electromagnetic valve 40 to control the gas to enter and exit, and is in a normally open state in the system.
And a second pressure gauge 42, wherein the second pressure gauge 42 is used for displaying the gas pressure in the engine.
And a fourth safety valve 20, wherein the fourth safety valve 20 ensures the safety of the gas pressure in the pipeline.
And a pressure sensor 34, wherein the pressure sensor 34 detects the gas pressure condition in the buffer tank 38.
A ninth ball valve 24 for controlling the gas in and out of branch two. Is in a normally open state in the system.
A fourth electromagnetic valve 25, wherein the fourth electromagnetic valve 25 is used for reducing the safety problem caused by manual operation.
The high-frequency electromagnetic valve 26 controls the pressure of gas entering the engine 9, and ensures that the pressure inside the engine 9 is always in a stable state.
And a fifth electromagnetic valve 8, which regulates the gas pressure in the high-pressure gas pipe according to the actual requirement.
And a third one-way valve 7, wherein the third one-way valve 7 is used for preventing the gas in the exhaust pipeline from reversely flowing into the high-pressure gas pipe.
And a second needle valve 6, wherein the second needle valve 6 is used for adjusting the opening degree of the pipeline and the gas discharge speed.
And a third electromagnetic valve 23, wherein the third electromagnetic valve 23 is used for exhausting gas in the pipeline.
A seventh ball valve 21, wherein the seventh ball valve 21 is a backup valve for preventing the electromagnetic valve from failing to close the pipeline, and the valve is normally open in the system.
A first one-way valve 4, wherein the first one-way valve 4 is used for preventing gas inside the emptying pipeline from flowing back into the high-pressure gas pipeline.
And an eighth ball valve 22, wherein the eighth ball valve 22 is used for manually exhausting the internal gas pressure of the high-pressure pipeline.
And a second check valve 5, wherein the second check valve 5 is used for preventing gas inside the emptying pipeline from flowing back into the high-pressure gas pipeline.
The gas cylinder 2 low-temperature pump, the second safety valve 17, the first needle valve 18, the vaporizer 14, the safety valve 3, the first pressure gauge 30, the fifth ball valve 31, the first electromagnetic valve 32, the buffer tank, the vaporizer, the pressure sensor, the 'temperature sensor', the second electromagnetic valve 40, the sixth ball valve 41 and the second pressure gauge 42 jointly form a first high-pressure pipeline 44. The pressure sensor detects the gas pressure in the buffer tank in real time, feeds back and adjusts the working states of the hydraulic system and the heating gasification system, and maintains the stability of the pressure of the gas internal system.
The gas cylinder, the low-temperature pump, the second safety valve 17, the first needle valve 18, the vaporizer, the safety valve 3, the first pressure gauge 30, the fifth ball valve 31, the first electromagnetic valve 32, the buffer tank 38, the gas consumption meter 39, the pressure sensor 34, the temperature sensor 35, the ninth ball valve 24, the fourth electromagnetic valve 25, the high-frequency electromagnetic valve 26, the tenth ball valve 27, the second pressure gauge 42, the fifth electromagnetic valve 8, the third check valve 7 and the second needle valve 6 jointly form a second high-pressure pipeline 28. The internal pressure of the pressure pipeline can be changed and changed at any time and a stable state can be maintained according to the requirement of required pressure, and the internal gas pressure of the engine can be controlled more accurately. The pressure sensor detects the gas pressure in the buffer tank in real time, feeds back and adjusts the working states of the hydraulic system and the heating gasification system, and maintains the stability of the pressure of the gas internal system.
The third electromagnetic valve 23, the seventh ball valve 21 and the first one-way valve 4 jointly form an electric control exhaust branch, manual operation is reduced,
the eighth ball valve 22 and the second one-way valve 5 jointly form a manual exhaust branch, so that the problem that gas cannot be exhausted due to failure of electric control exhaust is solved.
The above-described embodiments are merely preferred embodiments of the present invention, and should not be construed as limiting the present invention, and the scope of the present invention is defined by the claims, and equivalents including technical features described in the claims. I.e., equivalent alterations and modifications within the scope hereof, are also intended to be within the scope of the invention.
Claims (10)
1. A gas pressure stabilizing and adjusting system is characterized in that: the device comprises a hydraulic system and a heating gasification system, wherein a hydraulic station (1) of the hydraulic system is communicated with a gas cylinder (2), the heating gasification system is communicated with a vaporizer (14), the gas cylinder (2) is communicated with the vaporizer (14) through a cryogenic pump, the vaporizer (14) is communicated with an engine (9) through a first high-pressure pipeline (44), a buffer tank (38) is arranged on the first high-pressure pipeline (44), a second electromagnetic valve (40) is arranged between the buffer tank (38) and the engine (9), a second high-pressure pipeline (28) is also arranged, two ends of the second high-pressure pipeline (28) are connected in parallel with two ends of the second electromagnetic valve (40), a fourth electromagnetic valve (25) and a high-frequency electromagnetic valve (26) are sequentially arranged on the second high-pressure pipeline (28), and the fourth electromagnetic valve (25) and the high-frequency electromagnetic valve (26) are communicated with an emptying pipe through a fifth electromagnetic valve (8);
the carburetor (14) is communicated with the emptying pipe through a third safety valve (19);
the gas cylinder (2) and the vaporizer (14) are arranged in the gas cylinder room, and the gas cylinder (2) is communicated with the emptying pipe through the first safety valve (3).
2. The gas pressure regulation system of claim 1, wherein: the gas cylinder (2) is communicated with the carburetor (14) through a second safety valve (17), the second safety valve (17) is communicated with the emptying pipe, and a first needle valve (18) is further arranged on one side of the second safety valve (17).
3. The gas pressure regulation system of claim 1, wherein: the vaporizer (14) is communicated with the buffer tank (38) through a first electromagnetic valve (32), a fifth ball valve (31) is arranged on one side of the first electromagnetic valve (32), and a first pressure gauge (30) is arranged on one side of the fifth ball valve (31).
4. A gas pressure regulation system according to claim 3, wherein: a pressure sensor (34) and a temperature sensor (35) are arranged between the first electromagnetic valve (32) and the buffer tank (38), the pressure sensor (34) and the temperature sensor (35) are electrically connected with an acquisition card (36), and the acquisition card (36) is electrically connected with a monitoring computer (37).
5. The gas pressure regulation system of claim 4, wherein: a gas consumption instrument (39) is arranged between the buffer tank (38) and the second electromagnetic valve (40), the gas consumption instrument (39) is electrically connected with the acquisition card (36), a sixth ball valve (41) is arranged between the second electromagnetic valve (40) and the engine (9), and a second pressure gauge (42) is arranged on one side of the sixth ball valve (41).
6. The gas pressure regulation system of claim 1, wherein: a ninth ball valve (24) and a tenth ball valve (27) are arranged on the second high-pressure pipeline (28), the ninth ball valve (24) is arranged on one side of the fourth electromagnetic valve (25), and the tenth ball valve (27) is arranged on one side of the high-frequency electromagnetic valve (26).
7. The gas pressure regulation system of claim 1, wherein: the fifth electromagnetic valve (8) is communicated with the emptying pipe through a second needle valve (6), and a third one-way valve (7) is arranged between the second needle valve (6) and the fifth electromagnetic valve (8).
8. The gas pressure regulation system of claim 1, wherein: the first electromagnetic valve (32) is communicated with the buffer tank (38) through a plurality of branches and an emptying pipe, the first branch is communicated with the emptying pipe through a fourth safety valve (20), and the second branch is communicated with the emptying pipe through a third electromagnetic valve (23), a seventh ball valve (21) and a first one-way valve (4) in sequence;
the third branch is communicated with the emptying pipe through an eighth ball valve (22) and a second one-way valve (5) in sequence.
9. The gas pressure regulation system of claim 1, wherein: the heating gasification system comprises a heater (10), and the heater (10) is communicated with a vaporizer (14) through a circulation pipeline.
10. A method of regulating a gas regulator system according to any one of claims 1 to 9, characterized by:
the method comprises the following steps:
s1, the liquefied gas in the gas cylinder (2) is pumped into a vaporizer (14) in a heating and vaporizing system by a cryogenic pump to be ready for vaporization, the liquefied gas is completely vaporized by a heater (10) and the vaporizer (14), and then the liquefied gas is sent into a first high-pressure pipeline (44);
s2, monitoring the internal pressure of the first high-pressure pipeline (44) by the pressure sensor (34), and if the pressure of the first high-pressure pipeline (44) does not reach a set pressure value, feeding back the pressure to the control system to control the hydraulic system and the heating gasification system to continue working until the pressure reaches a preset value;
s3, if the pressure of the pressure sensor (34) reaches a preset value, the pressure is fed back to the control system, the work of the hydraulic system and the heating gasification system is stopped, and the internal pressure of the first high-pressure pipeline (44) is maintained to be stable;
s4, when the system selects to use the first high-pressure pipeline (44), the fourth electromagnetic valve (25) and the high-frequency electromagnetic valve (26) on the second high-pressure pipeline (28) are closed, the pressure in the pipeline is kept stable in a constant pressure range, and because the system has no secondary regulation function, if the pressure is required to be changed, the internal pressure of the system needs to be changed by matching with the exhaust of an engine, and the working conditions of the hydraulic system and the heating system are regulated and controlled in real time according to the pressure sensor;
s5, when the system selects to use the second high-pressure pipeline (28), the second electromagnetic valve (40) on the first high-pressure pipeline (44) is closed, and after the pressure value is set, if the pressure is reduced, the control system controls the opening and closing of the fifth electromagnetic valve (8) to discharge the redundant gas;
if the pressure in the second high-pressure pipeline (28) is higher than the set pressure, the hydraulic system and the heating system are controlled to work according to the feedback condition of the pressure sensor (34).
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| CN202110768247.8A CN113586292A (en) | 2021-07-07 | 2021-07-07 | Gas pressure stabilizing and adjusting system and adjusting method thereof |
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