CN113864635B - Small storage tank gas supply method and system - Google Patents

Small storage tank gas supply method and system Download PDF

Info

Publication number
CN113864635B
CN113864635B CN202111034906.1A CN202111034906A CN113864635B CN 113864635 B CN113864635 B CN 113864635B CN 202111034906 A CN202111034906 A CN 202111034906A CN 113864635 B CN113864635 B CN 113864635B
Authority
CN
China
Prior art keywords
storage tank
value
gas
pressure
preset value
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202111034906.1A
Other languages
Chinese (zh)
Other versions
CN113864635A (en
Inventor
熊伟
严超雄
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Hongzhi Intelligent Equipment Co Ltd
Original Assignee
Shenzhen Hongzhi Intelligent Equipment Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenzhen Hongzhi Intelligent Equipment Co Ltd filed Critical Shenzhen Hongzhi Intelligent Equipment Co Ltd
Priority to CN202111034906.1A priority Critical patent/CN113864635B/en
Publication of CN113864635A publication Critical patent/CN113864635A/en
Application granted granted Critical
Publication of CN113864635B publication Critical patent/CN113864635B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • F17C9/00—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure
    • F17C9/02—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure with change of state, e.g. vaporisation
    • 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
    • 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
    • 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
    • F17C13/12—Arrangements or mounting of devices for preventing or minimising the effect of explosion ; Other safety measures
    • 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
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • 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
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/032—Hydrocarbons
    • F17C2221/035—Propane butane, e.g. LPG, GPL
    • 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
    • F17C2223/0146—Two-phase
    • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
    • 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
    • F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
    • F17C2223/033—Small pressure, e.g. for liquefied gas
    • 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
    • F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
    • F17C2225/01—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the phase
    • F17C2225/0146—Two-phase
    • F17C2225/0153—Liquefied gas, e.g. LPG, GPL
    • 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
    • F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
    • F17C2225/03—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the pressure level
    • F17C2225/033—Small pressure, e.g. for liquefied gas
    • 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
    • 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
    • F17C2250/0447—Composition; Humidity
    • F17C2250/0452—Concentration of a product
    • 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
    • F17C2250/07—Actions triggered by measured parameters
    • F17C2250/072—Action when predefined value is reached
    • 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
    • F17C2260/00—Purposes of gas storage and gas handling
    • F17C2260/03—Dealing with losses
    • F17C2260/035—Dealing with losses of fluid
    • F17C2260/038—Detecting leaked fluid
    • 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
    • F17C2270/00—Applications
    • F17C2270/07—Applications for household use
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/32—Hydrogen storage

Landscapes

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

Abstract

The application relates to a method and a system for supplying gas to a small storage tank, wherein the method comprises the following steps: acquiring a pressure value of a storage tank storing liquid LPG; controlling the working states of the storage tank and the gasifier based on the comparison result of the pressure value and the first pressure preset value and the second pressure preset value; wherein the second pressure preset value is greater than the first pressure preset value; if the pressure value is smaller than the first pressure preset value, controlling the storage tank to be switched to a liquid phase output state, and controlling the gasifier to be switched to an open state; and if the pressure value is greater than the second pressure preset value, controlling the storage tank to be switched to a gas phase output state, and controlling the gasifier to be switched to a closed state. The temperature is high in summer, the liquid LPG in the LPG steel cylinder is heated and gasified, and when the pressure of the storage tank is higher than a second pressure preset value (0.6 MPa), the downstream gas supply requirement can be effectively met; the storage tank is controlled to be switched to a gas phase output state, and the gasifier is controlled to be switched to a closed state, so that resources are saved.

Description

Small storage tank gas supply method and system
Technical Field
The application relates to the field of liquefied petroleum gas supply, in particular to a method and a system for supplying gas to a small storage tank.
Background
There are two supply modes for household gas: a gas cylinder or a gas pipeline.
The gas pipeline is widely popularized in newly built communities with the advantages of convenience and the like. When fuel gas is supplied for a fuel gas pipeline, LPG cylinder group gas supply equipment is generally adopted in the industry, a mode of adding a pipeline to an LPG cylinder group gas supply device is adopted for supplying gas to a user, LPG steel cylinders can be divided into 3 specifications such as 15kg, 50kg, 200 kg and the like, wherein 50kg steel cylinders are commonly used.
A plurality of LPG steel cylinders are all connected to a pipeline through high-pressure rubber pipes, liquid LPG in the steel cylinders enters a gasification furnace to be forcedly (heated) and gasified into gaseous LPG, and then the gaseous LPG is supplied to a low-pressure gas pipeline after pressure regulation.
With respect to the related art among the above, the inventors consider that the following drawbacks exist: in summer, the temperature is high, the liquid LPG in the LPG steel cylinder is heated and gasified, and at the moment, the gasifier is still utilized to forcedly gasify the liquid LPG into a gaseous state, so that resource waste is caused.
Disclosure of Invention
In order to realize that when natural gasification meets the use requirement, forced gasification is automatically closed to save resources, the application provides a method and a system for supplying gas to a small storage tank.
In a first aspect, the application provides a method for supplying gas to a small storage tank, which adopts the following technical scheme:
a small storage tank air supply method comprises the following steps:
acquiring a pressure value of a storage tank storing liquid LPG;
controlling the working states of the storage tank and the gasifier based on the comparison result of the pressure value and the first pressure preset value and the second pressure preset value; wherein the second pressure preset value is greater than the first pressure preset value;
if the pressure value is smaller than the first pressure preset value, controlling the storage tank to be switched to a liquid phase output state, and controlling the gasifier to be switched to an open state; and if the pressure value is greater than the second pressure preset value, controlling the storage tank to be switched to a gas phase output state, and controlling the gasifier to be switched to a closed state.
By adopting the technical scheme, the temperature is high in summer, the liquid LPG in the LPG steel cylinder is heated and gasified, and when the pressure of the storage tank is higher than a second pressure preset value (0.6 MPa), the downstream gas supply requirement can be effectively met; controlling the storage tank to be switched to a gas phase output state and controlling the gasifier to be switched to a closed state so as to save resources;
the natural gasification capacity of the liquefied petroleum gas is weaker due to low air temperature in winter, and when the pressure of the storage tank is lower than a first pressure preset value (0.42 MPa), a forced gasification mode needs to be started to ensure stable downstream gas supply; the storage tank is controlled to be switched to a liquid phase output state, and the gasifier is controlled to be switched to an open state, so that the stability of downstream gas supply is guaranteed.
Preferably, the method further comprises the following steps:
controlling the storage tank to be switched to a normal working state or a pressure releasing state based on a comparison result of the pressure value and a third pressure preset value; wherein the third pressure preset value is greater than the second pressure preset value.
Through adopting above-mentioned technical scheme, because of unexpected reason (like unusual weather or fire) lead to the too high pressure in the storage tank, then control storage tank release pressure to make the storage tank not receive the destruction.
Preferably, the method further comprises the following steps:
acquiring a gas concentration value outside the storage tank;
and controlling the storage tank to be switched to a normal working state or a gas supply cut-off state based on a comparison result of the gas concentration value and the gas concentration preset value.
Through adopting above-mentioned technical scheme, when the pipeline of storage tank takes place to leak, the gas that overflows is detected to control the storage tank and cut off the air feed, prevent to leak and enlarge.
Preferably, the method further comprises the following steps:
acquiring the current time and the current output flow value of the storage tank;
acquiring an output flow value of the storage tank within a preset number of days before the current date, generating a flow-time actual curve, and fitting a flow-time prediction curve;
comparing the current output flow value with a predicted output flow value obtained from a flow-time prediction curve based on the current time;
and if the ratio of the current output flow value to the predicted output flow value is greater than the threshold value, controlling the storage tank to be switched from the normal working state to the emergency gas cut-off state.
By adopting the technical scheme, if the ratio of the current output flow value to the predicted output flow value is greater than the threshold value, large-area leakage possibly occurring at the downstream is judged, and further the emergency gas cut-off of the storage tank is controlled, so that leakage expansion is prevented.
Preferably, after the step of controlling the storage tank to switch from the normal operation state to the emergency gas-off state, the method further comprises:
acquiring current consumption flow values of all user sides, and matching the current consumption flow values with current output flow values;
and if the matching is successful, controlling the storage tank to be switched from the emergency gas-cut-off state to the normal working state.
By adopting the technical scheme, if the ratio of the current output flow value to the predicted output flow value is greater than the threshold value, large-area leakage possibly occurring at the downstream is judged, and then the emergency gas cut-off of the storage tank is controlled firstly to prevent the leakage from expanding; then, acquiring current consumption flow values of all the user sides, matching the current consumption flow values with current output flow values, and realizing secondary calibration to determine whether large-area leakage exists;
whether large-area leakage occurs at the downstream is predicted locally, and measures are taken in time to prevent leakage expansion as much as possible; and then remotely acquiring data, transmitting and matching to perform secondary calibration and confirm whether large-area leakage exists.
Preferably, the method further comprises the following steps:
acquiring and displaying a liquid level value in a storage tank storing liquid LPG;
and marking the displayed liquid level value based on the comparison result of the liquid level value and the liquid level preset value.
Through adopting above-mentioned technical scheme, the staff of being convenient for in time knows the storage tank quantity to arrange the distribution of liquid LPG.
In a second aspect, the present application provides a small storage tank gas supply system, which adopts the following technical scheme:
a small-sized storage tank gas supply system comprises a storage tank, a gas taking valve, a gas phase pipeline, a gas outlet pipeline, a liquid taking valve, a liquid phase pipeline, a gasification furnace, a pressure sensor and a local computer;
the storage tank is used for storing liquid LPG; one end of the gas taking valve is communicated with the storage tank, the other end of the gas taking valve is communicated with the gas outlet pipeline through the gas phase pipeline, and the gas taking valve is used for gaseous LPG to pass through; one end of the liquid taking valve is communicated with the storage tank, the other end of the liquid taking valve is communicated with an inlet of the gasification furnace through the liquid phase pipeline, and the liquid taking valve is used for allowing liquid LPG to pass through; the outlet of the gasification furnace is communicated with an air outlet pipeline;
the pressure sensor is connected with the storage tank and used for detecting the pressure in the storage tank and outputting a pressure value to the local computer;
and the control controls the working states of the gas preparation valve, the liquid taking valve and the gasifier based on the comparison result of the pressure value and the first pressure preset value.
By adopting the technical scheme, the switching between the automatic control natural gasification mode and the forced gasification mode is realized, so that the resources are saved and the stability of downstream gas supply is ensured.
Preferably, the device also comprises a flow sensor and an emergency cut-off valve;
the flow sensor is connected to the gas outlet pipeline and used for detecting the gas flow in the gas outlet pipeline and outputting the current output flow value to the local computer;
the emergency cut-off valve is arranged between the storage tank and the air outlet pipeline;
the local computer acquires the current time and the current output flow value of the storage tank;
the local computer acquires the output flow value of the storage tank within a preset number of days before the current date, generates a flow-time actual curve and fits a flow-time prediction curve;
the local computer comparing the current output flow value to a predicted output flow value obtained from a flow-time prediction curve based on the current time; and the local computer controls the opening or closing of the emergency cutoff valve based on the comparison result.
By adopting the technical scheme, whether large-area leakage occurs at the downstream is locally predicted, and if the large-area leakage occurs at the downstream, measures are quickly taken to prevent the leakage expansion as much as possible.
Preferably, the gas detection device further comprises a gas detection sensor; the gas detection sensor is arranged outside the storage tank and used for detecting the gas concentration in the air and sending the gas concentration value to the local computer;
and the local computer controls the opening or closing of the emergency cut-off valve based on the comparison result of the gas concentration value and the gas concentration preset value.
By adopting the technical scheme, when the pipeline of the storage tank leaks, overflowed gas is detected by the gas detection sensor, and the local computer controls the emergency cut-off valve to be closed to cut off gas supply, so that leakage expansion is prevented.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the temperature is high in summer, the liquid LPG in the LPG steel cylinder is heated and gasified, and when the pressure of the storage tank is higher than a second pressure preset value (0.6 MPa), the downstream gas supply requirement can be effectively met; the storage tank is controlled to be switched to a gas phase output state, and the gasifier is controlled to be switched to a closed state, so that resources are saved;
2. the temperature is low in winter, the natural gasification capacity of the liquefied petroleum gas is weak, and when the pressure of the storage tank is lower than a first pressure preset value (0.42 MPa), a forced gasification mode needs to be started to ensure stable downstream gas supply; controlling the storage tank to be switched to a liquid phase output state and controlling the gasifier to be switched to an open state so as to ensure stable downstream gas supply;
3. whether large-area leakage occurs at the downstream is predicted locally so as to take measures in time and prevent leakage expansion as much as possible; and then remotely acquiring data, transmitting and matching to perform secondary calibration and confirm whether large-area leakage exists.
Drawings
FIG. 1 is a schematic diagram of the operation of a gas supply system for a small storage tank in a gas phase output state.
FIG. 2 is a schematic diagram of the operation of the gas supply system for the small storage tank in the liquid phase output state.
FIG. 3 is a block diagram of a small tank air supply system.
FIG. 4 is a flow chart showing the control of switching between the gas phase output state and the liquid phase output state in the method for supplying gas to a small-sized storage tank.
FIG. 5 is a flow chart of a method for supplying gas to a small storage tank, which is used for judging large-area gas leakage of a downstream pipeline.
Description of reference numerals: 1. a storage tank; 2. taking an air valve; 3. a gas phase conduit; 4. an air outlet pipe; 5. a liquid taking valve; 6. a liquid phase conduit; 7. a gasification furnace; 8. a liquid level sensor; 9. a pressure sensor; 10. a gas detection sensor; 11. a flow sensor; 12. a local computer; 13. an emergency shut-off valve; 131. a gas phase cut-off valve; 132. a liquid phase cut-off valve; 14 safety valve.
Detailed Description
The present application is described in further detail below with reference to figures 1-5.
The gas pipeline is widely popularized in a newly-built community with the advantages of convenience and the like, and a gas remote meter reading system is usually configured on the gas pipeline so as to remotely acquire gas meter data of each user.
When the gas remote meter reading system works, the server sequentially sends meter reading instructions to the intelligent gas meters of all users; and after the intelligent gas meter receives the meter reading instruction and confirms that the meter reading instruction is correct, the intelligent gas meter transmits the meter data to the server. The server and the intelligent gas meter can be communicated in a bus interface mode.
Referring to fig. 1, the embodiment of the application discloses a small-size storage tank 1 gas supply system, including storage tank 1, get pneumatic valve 2, gaseous pipeline 3, pipeline 4 of giving vent to anger, get liquid valve 5, liquid phase pipeline 6 and gasifier 7.
The tank 1 is used for storing liquid LPG. One end of the gas taking valve 2 is communicated with the storage tank 1 and is used for gaseous LPG to pass through; the other end of the gas taking valve 2 is communicated with a gas outlet pipeline 4 through a gas phase pipeline 3. The air outlet pipeline 4 is communicated to a user pipeline.
In summer, the temperature is high, the liquid LPG in the storage tank 1 is naturally gasified into gaseous LPG under the influence of the temperature, and the gaseous LPG is output through the gas taking valve 2 and the gas phase pipeline 3 and flows to a user through the gas outlet pipeline 4. Namely, at this time, the tank 1 is in a gas phase output state.
Referring to fig. 2, one end of the liquid taking valve 5 is communicated with the storage tank 1 for the liquid LPG to pass through; the other end of the liquid taking valve 5 is communicated with an inlet of a gasification furnace 7 through a liquid phase pipeline 6. The outlet of the gasification furnace 7 is communicated with the gas outlet pipeline 4.
The air temperature is low in winter, and natural gasification is not enough to meet the use requirements of users; therefore, the liquid LPG flows into the gasification furnace 7 through the liquid taking valve 5 and the liquid phase pipeline 6, the gasification furnace 7 heats the liquid LPG to force the liquid LPG to become the gaseous LPG, and the gaseous LPG is output from the outlet of the gasification furnace 7 and flows to the user through the gas outlet pipeline 4 to guarantee the gas supply to the user. Namely, at this time, the tank 1 is in a liquid phase output state.
Referring to fig. 2 and 3, the air supply system of the small storage tank 1 further includes a liquid level sensor 8, a pressure sensor 9, a gas detection sensor 10, a flow sensor 11, a local computer 12, an emergency cut-off valve 13 and a safety valve 14.
The liquid level sensor 8 is disposed on the storage tank 1, and is configured to detect a liquid level of the liquid LPG in the storage tank 1 and output a liquid level value to the local computer 12. The pressure sensor 9 is provided on the storage tank 1, and is configured to detect a pressure in the storage tank 1 and output the pressure value to the local computer 12. The gas detection sensor 10 is disposed outside the storage tank 1, and is configured to detect a gas concentration in air around the storage tank 1, and send the gas concentration to the local computer 12. The flow sensor 11 is connected to the outlet pipe 4, and is configured to detect a gas flow in the outlet pipe 4 and output a current output flow value to the local computer 12.
Meanwhile, the local computer 12 is also coupled with a gas remote meter reading system; the local computer 12 controls the opening or closing of the gas taking valve 2, the liquid taking valve 5, the gasification furnace 7, the emergency cut-off valve 13 and the safety valve 14 based on the pressure value, the gas concentration value, the current output flow value and the gas consumption data in the gas remote meter reading system.
The quick disconnect valve 13 includes a gas phase cut-off valve 131 and a liquid phase cut-off valve 132. The gas phase cut-off valve 131 is connected to the gas phase pipeline 3; the liquid phase cut-off valve 132 is connected to the liquid phase pipe 6. One end of the safety valve 14 is communicated with the storage tank 1, and the other end of the safety valve 14 is communicated to other storage containers through a pipeline.
Referring to fig. 4, the embodiment of the present application further discloses a method for supplying gas to the small storage tank 1, which includes the following steps:
s11, acquiring the pressure value of the storage tank 1 storing the liquid LPG.
The pressure sensor 9 is disposed on the storage tank 1, and is configured to detect a pressure in the storage tank 1 and output the pressure value to the local computer 12.
S12, controlling the working states of the storage tank 1 and the gasifier based on the comparison result of the pressure value, the first pressure preset value and the second pressure preset value; wherein the second pressure preset value is greater than the first pressure preset value.
In one embodiment, the first pressure preset is set to 0.42MPa and the second pressure preset is set to 0.6MPa. The local computer 12 receives the pressure value sent by the pressure sensor 9 and compares the pressure value with the first pressure preset value and the second preset value, and the local computer 12 controls the opening or closing of the gas preparation valve 2, the liquid taking valve 5 and the gasification furnace 7 based on the comparison result.
And S13, if the pressure value is smaller than the first pressure preset value, controlling the storage tank 1 to be switched to a liquid phase output state, and controlling the vaporizer to be switched to an open state.
If the pressure value is smaller than the first pressure preset value, it represents that the natural gasification of the liquid LPG in the storage tank 1 is insufficient to meet the gas supply demand of the user, the local computer 12 controls the liquid preparation valve 2 to be closed, the liquid preparation valve 5 to be opened, and the gasification furnace 7 to be opened, so that the liquid LPG in the storage tank 1 flows into the gasification furnace 7 through the liquid preparation valve 5 and the liquid phase pipeline 6, the gasification furnace 7 heats the liquid LPG to force the liquid LPG to be changed into the gaseous LPG, and the gaseous LPG is output from the outlet of the gasification furnace 7 and flows to the user through the gas outlet pipeline 4 to ensure the gas supply to the user.
And S14, if the pressure value is greater than the second pressure preset value, controlling the storage tank 1 to be switched to a gas phase output state, and controlling the gasifier to be switched to a closed state.
If the pressure value is greater than the second pressure preset value, the natural gasification of the liquid LPG in the storage tank 1 can meet the gas supply requirement of the user, the local computer 12 controls the gas preparation valve 2 to be opened, the liquid taking valve 5 to be opened and closed and the gasification furnace 7 to be closed, and the gaseous LPG is output through the gas taking valve 2 and the gas phase pipeline 3 and flows to the user through the gas outlet pipeline 4.
S15, controlling the storage tank 1 to be switched to a normal working state or a pressure releasing state based on a comparison result of the pressure value and a third pressure preset value; wherein the third pressure preset value is greater than the second pressure preset value.
When the liquid LPG in the storage tank 1 is gasified in a large amount due to an unexpected reason (such as abnormal weather or fire), and the pressure in the storage tank 1 is too high, the local computer 12 controls the safety valve 14 to open, the gas valve 2 to close, and the liquid valve 5 to close, so as to release the pressure in the storage tank 1, so that the storage tank 1 is not damaged. Meanwhile, in one embodiment, the other end of the safety valve 14 is connected to other storage containers in a vacuum state through a pipe to prevent gas from leaking to the atmosphere; and there is a safe distance between the reserve storage container and the tank 1.
And S21, acquiring and displaying a liquid level value in the storage tank 1 storing the liquid LPG.
The liquid level of the liquid LPG in the storage tank 1 is measured through the liquid level sensor 8 arranged on the storage tank 1, the liquid level value is output to the local computer 12, and the local computer 12 sends the liquid level value to the display for being checked by workers.
And S22, marking the displayed liquid level value based on the comparison result of the liquid level value and the liquid level preset value.
In one embodiment, the displayed level values are marked with different color pairs. The liquid level preset values comprise a first liquid level preset value and a second liquid level preset value, and the first liquid level preset value is larger than the second liquid level preset value. The local computer 12 receives the liquid level value and compares the liquid level value with a liquid level preset value; if the liquid level value is greater than the first liquid level preset value, the local computer 12 controls the liquid level value displayed by the display to be green; if the liquid level value is smaller than the first liquid level preset value and larger than the second liquid level preset value, the local computer 12 controls the liquid level value displayed by the display to be yellow; if the level value is less than the second level preset value, the local computer 12 controls the level value displayed by the display to be red.
The staff can be based on the colour of the level value and schedule replenishment of liquid LPG into the tank 1.
And S31, acquiring a gas concentration value outside the storage tank 1.
And S32, controlling the storage tank 1 to be switched to a normal working state or a gas supply cut-off state based on a comparison result of the gas concentration value and the gas concentration preset value.
When the pipeline of the storage tank 1 leaks, the fuel gas overflows, so that the concentration of the fuel gas in the air is increased; the gas detection sensor 10 arranged outside the storage tank 1 detects the gas concentration in the air in real time and outputs the gas concentration value to the local computer 12, if the gas concentration value is larger than the preset gas concentration value, the local computer 12 judges that the pipeline of the storage tank 1 leaks, and immediately the local computer 12 controls the gas preparation valve 2 to be closed and the liquid taking valve 5 to be closed so as to prevent leakage from expanding. Meanwhile, in one embodiment, when the gas concentration value is greater than the gas concentration preset value, the local computer 12 further sends a fault message to the display for displaying, so as to remind personnel to perform fault processing.
Referring to fig. 5, S41, the current time and the current output flow value of the tank 1 are acquired.
A flow sensor 11 connected to the gas outlet pipe 4 detects the gas flow in the gas outlet pipe 4 in real time and sends an output flow value to a local computer 12; at the same time, the local computer 12 acquires the current time through the network.
S42, obtaining the output flow value of the storage tank 1 within the preset number of days before the current date, generating a flow-time actual curve, and fitting a flow-time prediction curve.
Specifically, the local computer 12 records the output flow value once every preset time (for example, every 5 minutes, 10 minutes, or 15 minutes); and, the local computer 12 deletes data more than a preset number of days (e.g., 7 days, 14 days, 21 days, etc.) before the current date. For example: if the preset number of days is 7 days and the current date is 7/8/month, the local computer 12 deletes the data recorded in 31/6/month; the date of the next day is 7/month 9, the data recorded in 7/month 1 is deleted by the local computer 12.
Meanwhile, the local computer 12 calculates an average output flow value at the same time as a predicted value based on a plurality of output flow values at the same time in preset days. For example, no. 7/month No. 1 08; 08 # 7/month 2, the output flow value is A2; … …; 08 # 00 on 7 th month, when the output flow rate value is A7, the predicted value a8= (A1 + A2+ … … + A7)/7 is calculated, and a flow rate-time prediction curve is generated by fitting based on the predicted values at a plurality of times.
S43, comparing the current output flow value with a predicted output flow value obtained from the flow-time prediction curve based on the current time.
And S44, if the ratio of the current output flow value to the predicted output flow value is greater than the threshold value, controlling the storage tank 1 to be switched from the normal working state to the emergency gas cut-off state.
Specifically, there is a deviation between the current output flow value and the predicted output flow value, and if the deviation is smaller than the threshold, the local computer 12 determines that the downstream is in a normal use state, that is, the user uses the gas normally; if the deviation is greater than the threshold value, the local computer 12 determines that a large area of leakage may occur downstream, and immediately the local computer 12 controls the gas phase cutoff valve 131 and the liquid phase cutoff valve 132 to close synchronously to cut off the gas supply urgently to prevent the leakage from expanding.
And S45, acquiring the current consumption flow values of all the user sides, and matching the current consumption flow values with the current output flow values. If the matching is successful, the storage tank 1 is controlled to be switched to a normal working state from an emergency gas-cut-off state.
The local computer 12 controls the gas phase cut-off valve 131 and the liquid phase cut-off valve 132 to close synchronously so that after the gas supply is cut off urgently, the gas still remains in the pipeline for the user to use in a short time.
The local computer 12 is further coupled to the gas remote meter reading system, when the local computer 12 determines that a large area of downstream leakage may occur, the local computer 12 sends an instruction to a server of the gas remote meter reading system, and the server of the gas remote meter reading system responds to the instruction of the local computer 12 and sends a meter reading instruction to the intelligent gas meters of each user twice at preset time intervals.
Based on the two meter reading values, the current consumption flow value of each user can be calculated, the total gas consumption amount of each user is obtained by accumulating the gas consumption amount of each user, if the deviation between the total gas consumption amount and the current output flow value is an allowable error (namely, the matching is successful), the local computer 12 judges that large-area leakage does not occur at the downstream, and the local computer 12 controls the gas phase cut-off valve 131 and the liquid phase cut-off valve 132 to be synchronously opened so as to supplement gas into the pipeline and meet the use requirements of the users; if the deviation between the total gas consumption and the current output flow value exceeds the allowable error (namely, the matching fails), the local computer 12 confirms that the large-area leakage occurs downstream, and sends fault information to the display for displaying so as to remind the staff of timely processing.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (7)

1. A method for supplying gas to a small storage tank (1) is characterized by comprising the following steps:
acquiring a pressure value of a storage tank (1) storing liquid LPG;
controlling the working state of the storage tank (1) and the gasifier based on the comparison result of the pressure value with the first pressure preset value and the second pressure preset value; wherein the second pressure preset value is greater than the first pressure preset value;
if the pressure value is smaller than the first pressure preset value, controlling the storage tank (1) to be switched to a liquid phase output state, and controlling the vaporizer to be switched to an open state; if the pressure value is larger than the second pressure preset value, controlling the storage tank (1) to be switched to a gas phase output state, and controlling the gasifier to be switched to a closed state;
acquiring the current time and the current output flow value of the storage tank (1);
acquiring an output flow value of the storage tank (1) within a preset number of days before the current date, generating a flow-time actual curve, and fitting a flow-time prediction curve;
comparing the current output flow value with a predicted output flow value obtained from a flow-time prediction curve based on the current time;
if the ratio of the current output flow value to the predicted output flow value is larger than the threshold value, controlling the storage tank (1) to be switched from the normal working state to the emergency gas cut-off state;
acquiring current consumption flow values of all the user sides, and matching the current consumption flow values with current output flow values;
if the matching is successful, the storage tank (1) is controlled to be switched to a normal working state from an emergency gas-off state.
2. Method for supplying gas to a compact tank (1) according to claim 1, characterized in that it comprises the following steps:
controlling the storage tank (1) to be switched to a normal working state or a pressure releasing state based on the comparison result of the pressure value and a third pressure preset value; wherein the third pressure preset value is greater than the second pressure preset value.
3. Method for supplying gas to a compact tank (1) according to claim 1, characterized in that it comprises the following steps:
acquiring a gas concentration value outside the storage tank (1);
and controlling the storage tank (1) to be switched to a normal working state or a gas supply cut-off state based on a comparison result of the gas concentration value and the gas concentration preset value.
4. Method for supplying gas to a compact tank (1) according to claim 1, characterized in that it comprises the following further steps:
acquiring and displaying a liquid level value in a storage tank (1) storing liquid LPG;
and marking the displayed liquid level value based on the comparison result of the liquid level value and the liquid level preset value.
5. A gas supply system for a small-sized storage tank (1), which applies the gas supply method for a small-sized storage tank (1) as claimed in claim 1, characterized in that: comprises a storage tank (1), a gas taking valve (2), a gas phase pipeline (3), a gas outlet pipeline (4), a liquid taking valve (5), a liquid phase pipeline (6), a gasification furnace (7), a pressure sensor (9) and a local computer (12);
the storage tank (1) is used for storing liquid LPG; one end of the gas taking valve (2) is communicated with the storage tank (1), the other end of the gas taking valve (2) is communicated with the gas outlet pipeline (4) through the gas phase pipeline (3), and the gas taking valve (2) is used for allowing gaseous LPG to pass through; one end of the liquid taking valve (5) is communicated with the storage tank (1), the other end of the liquid taking valve (5) is communicated with an inlet of the gasification furnace (7) through the liquid phase pipeline (6), and the liquid taking valve (5) is used for allowing liquid LPG to pass through; an outlet of the gasification furnace (7) is communicated with an air outlet pipeline (4);
the pressure sensor (9) is connected to the storage tank (1) and is used for detecting the pressure in the storage tank (1) and outputting the pressure value to the local computer (12);
and the control controls the working states of the gas taking valve (2), the liquid taking valve (5) and the gasifier based on the comparison result of the pressure value and the first pressure preset value.
6. The small-sized storage tank (1) air supply system according to claim 5, characterized in that: the device also comprises a flow sensor (11) and an emergency shut-off valve (13);
the flow sensor (11) is connected to the gas outlet pipeline (4) and is used for detecting the gas flow in the gas outlet pipeline (4) and outputting the current output flow value to the local computer (12);
the emergency cut-off valve (13) is arranged between the storage tank (1) and the air outlet pipeline (4);
the local computer (12) acquires the current time and the current output flow value of the storage tank (1);
the local computer (12) acquires the output flow value of the storage tank (1) within a preset number of days before the current date, generates a flow-time actual curve, and fits a flow-time prediction curve;
the local computer (12) comparing the current output flow value to a predicted output flow value obtained from a flow-time prediction curve based on the current time; and the local computer (12) controls the opening or closing of the quick action emergency valve (13) based on the comparison result.
7. The small-sized storage tank (1) air supply system according to claim 6, characterized in that: also comprises a gas detection sensor (10); the gas detection sensor (10) is arranged outside the storage tank (1) and used for detecting the gas concentration in the air and sending the gas concentration value to the local computer (12);
the local computer (12) controls the opening or closing of the emergency cut-off valve (13) based on the comparison result of the gas concentration value and the gas concentration preset value.
CN202111034906.1A 2021-09-04 2021-09-04 Small storage tank gas supply method and system Active CN113864635B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111034906.1A CN113864635B (en) 2021-09-04 2021-09-04 Small storage tank gas supply method and system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111034906.1A CN113864635B (en) 2021-09-04 2021-09-04 Small storage tank gas supply method and system

Publications (2)

Publication Number Publication Date
CN113864635A CN113864635A (en) 2021-12-31
CN113864635B true CN113864635B (en) 2023-03-21

Family

ID=78989643

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111034906.1A Active CN113864635B (en) 2021-09-04 2021-09-04 Small storage tank gas supply method and system

Country Status (1)

Country Link
CN (1) CN113864635B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116293423A (en) * 2023-03-10 2023-06-23 深圳高发气体股份有限公司 Air supply control method, device and equipment for air storage tank and storage medium

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4935334B2 (en) * 2006-12-11 2012-05-23 パナソニック株式会社 Flow rate measuring device and gas supply system using this device
EP2477020A1 (en) * 2011-01-17 2012-07-18 Clevergas Holding S.A. System for detecting a fluid leak
CN103307447B (en) * 2013-06-03 2015-06-10 清华大学 Technical failure information monitoring and early warning system for urban gas pipe network
CN113048402A (en) * 2019-12-27 2021-06-29 柯思科技股份有限公司 Medium-low pressure pipeline monitoring system and method thereof
CN112253995A (en) * 2020-07-24 2021-01-22 深圳市中燃科技有限公司 Safety monitoring system and method for small gas storage tank and intelligent terminal
CN112178455A (en) * 2020-09-28 2021-01-05 富地红华动力（武汉）有限责任公司 LPG (liquefied petroleum gas) small storage tank gasification control system and gasification control method thereof

Also Published As

Publication number Publication date
CN113864635A (en) 2021-12-31

Similar Documents

Publication Publication Date Title
US8539972B2 (en) Low consumption and intelligent safe gas-supply system using gas tanks
CN113864635B (en) Small storage tank gas supply method and system
US20010047621A1 (en) Injection system and method for odorizing natural gas
CN210462448U (en) Control metering device for filling hydrogen fuel vehicle
CN111429700A (en) Real-time data acquisition and processing system for natural gas transmission station
CN106032871A (en) Cryogenic liquid automatic filling system and method
CN113124313A (en) Sequential control disk set process of hydrogen filling station
US11603965B2 (en) Gaseous fueling system
AU2018344229B2 (en) Fuel cell system
CN207112356U (en) LNG feeders and LNG air supply systems
CN111120875B (en) System and method for processing monitoring data of gas meter
CN209744058U (en) Pressure protection system for large-drop liquefied petroleum gas pipeline
CN107883185A (en) LNG feeders and its workflow, LNG air supply systems
MXPA05013809A (en) Hydrogen storage and supply method.
CN201944547U (en) System for compressed natural gas supply station
CN213810053U (en) Gas pipeline pressure regulating device
CN213930425U (en) Intelligent safety control system for gas pipe network
CN114279651A (en) Airtightness testing system using diaphragm compressor and operation method
CN216591045U (en) LNG vaporization station central gas supply system
KR200494171Y1 (en) a valve position indicator of natural gas Pressure Control Valve
CN217714561U (en) Single metering 35Mpa, 70Mpa double-gun hydrogenation machine
CN113899507B (en) Pipeline assembly testing method for intelligent micro-pipe network ecological chain
CN217032924U (en) Utilize airtight test system of diaphragm compressor
CN204756436U (en) Quick gasification equipment of liquid nitrogen
CN219692949U (en) Information linkage type air supply system for intelligent microtubule network ecological chain

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant