CN109018746B - The method and system of liquid medium discharge in high-pressure bottle are realized using surge tank - Google Patents
The method and system of liquid medium discharge in high-pressure bottle are realized using surge tank Download PDFInfo
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- CN109018746B CN109018746B CN201810966300.3A CN201810966300A CN109018746B CN 109018746 B CN109018746 B CN 109018746B CN 201810966300 A CN201810966300 A CN 201810966300A CN 109018746 B CN109018746 B CN 109018746B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D90/00—Component parts, details or accessories for large containers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D90/00—Component parts, details or accessories for large containers
- B65D90/48—Arrangements of indicating or measuring devices
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- Mechanical Engineering (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The low pressure of liquid medium in high-pressure bottle, quantitative, intermittent discharge method and system are realized using closed surge tank the present invention relates to a kind of, Tube vibration problems when to solve discharge, the closed buffering pot bottom of install medium detection probe by tee tube and the delivery pipe connection for being equipped with discharge control valve and with the feed pipe connection that is equipped with inlet control valve, upper even elevated pressures container bottom, pressure transmitter and with the nitrogen injection pipe of nitrogen injection valve is installed at the top of closed surge tank；Discharge is that automatic controller opens inlet control valve, liquid medium to closed buffer tank pressure value is pressed into the closed surge tank for prestoring nitrogen from elevated pressures container to rise to the stopping feed pressure value of setting or when supreme liquid medium detection probe detects medium, close inlet control valve；Exhaust-control valve is opened, so that closed surge tank is pressed to discharge pipe line discharge liquid medium to closed buffer tank pressure value and is dropped to setting and stops discharge pressure value or when can't detect liquid medium to lower liquid medium detection probe, close exhaust-control valve.Have the advantages that flow at high speed and pipeline vibration will not be caused when discharge.
Description
Technical field
The present invention relates to a kind of tapping equipments of liquid medium in high-pressure bottle, utilize closed buffering more particularly to a kind of
Tank realizes the low pressure of liquid medium in high-pressure bottle, quantitative, intermittent discharge method and system.
Background technique
In petrochemical industry, due to the needs of production technology, the pressure in part producing device or storage tank is very high.When need
When being transported to low pressure vessel by the liquid medium in these process units or storage tank or be discharged into atmosphere, due in big pressure difference
Effect, liquid medium is by in-line flow at high speed.And swiftly flowing liquid medium will cause pipeline vibration, so that pipeline
Safety reduces, and therefore, relevant design specification is limited and provided to the maximum fluidity speed of liquid medium in-line.
Meanwhile swiftly flowing liquid medium becomes difficult relevant measurement and control, increases Safety Risk in Production.
Summary of the invention
Present invention aims to overcome that the drawbacks described above of the prior art, flow at high speed and will not be caused when a kind of discharge is provided
Pipeline vibration, is easy to measurement and control, security reliability it is strong utilize closed surge tank to realize liquid medium in high-pressure bottle
Low pressure, quantitative, intermittent discharge method, the invention further relates to system for carrying out the process.
To achieve the above object, the present invention using closed surge tank realize the low pressure of liquid medium in high-pressure bottle, it is quantitative,
Intermittent discharge method is that closed buffering pot bottom passes through a downward tee tube and the discharge pipe line for being equipped with discharge control valve
Connection and be equipped with inlet control valve, it is upper even elevated pressures container bottom feeding line connection, in closed surge tank side
Lower part and top be separately installed with upper and lower liquid medium detection probe, one pressure is installed respectively at the top of closed surge tank
The nitrogen of power transmitter and an installation nitrogen injection valve injects pipeline, pressure transmitter, inlet control valve and discharge control valve
And electricity connects controller to liquid medium detection probe automatically respectively；Or pressure transmitter, inlet control valve and discharge control valve and
Liquid medium detection probe and nitrogen injection valve are electrically connected automatic controller respectively.
Inlet control valve is opened when discharge, is pressed into liquid medium from elevated pressures container to the closed surge tank for prestoring nitrogen
The stopping feed pressure value of setting is risen to closed buffer tank pressure value or supreme liquid medium detection probe detects medium
When, close inlet control valve；Exhaust-control valve is opened, so that closed surge tank is pressed to discharge pipe line discharge liquid medium and delays to closed
It rushes pressure tank value and drops to setting and stop discharge pressure value or when can't detect liquid medium to lower liquid medium detection probe, close
Close exhaust-control valve.Downstream connection lower pressure vessel or evacuated tube, the low pressure vessel are that band top is arranged to discharge pipe line
The collecting tank of blank pipe or pressure limiting valve.The nitrogen of connection installation nitrogen relief valve discharges pipe at the top of closed surge tank.When with discharge
Flow at high speed and pipeline vibration will not be caused, be easy to measurement and control, the strong advantage of security reliability.
As optimization, according to the pressure value in elevated pressures container when discharge, manually or controller automatically opens nitrogen note
Enter valve and the nitrogen of relevant pressure is injected into closed surge tank, then nitrogen injection valve is automatically closed in manual or controller.
Operating mode has: A, according to the variation of the pressure value in closed surge tank, system sets a stopping charging first
Pressure value and stopping blowdown pressure value, open inlet control valve, set when detecting that the pressure value rising in closed surge tank reaches
When fixed stopping feed pressure value, inlet control valve is closed, starts discharge；When detecting that pressure value drops in closed surge tank
When the stopping blowdown pressure value of setting, discharge control valve is closed, stops discharge；B, according to be mounted on closed surge tank top and under
The detection probe in portion realizes the discharge of medium conveying: system is first turned on inlet control valve, when system detection to closed surge tank
When the upper liquid medium detection probe present position of side surface upper part is medium, system closes inlet control valve, stops charging；Then
System opens discharge control valve, starts discharge, when the lower liquid medium detection probe institute of system detection to closed surge tank lower part
Locate position be no medium when, system close discharge control valve stopping discharge.
As optimization, discharge pipe line, feeding line and nitrogen injection pipeline at least nitrogen injection pipeline on be equipped with only
Inverse valve.Discharge pipe line, feeding line and nitrogen injection pipeline at least feeding line and nitrogen injection pipeline on be equipped with it is non-return
Valve.Check (non-return) valve is fitted on discharge pipe line, feeding line and nitrogen injection pipeline.Check (non-return) valve is separately mounted to discharge pipe line
Discharge control valve tract, the inlet control valve Upstream section of feeding line, nitrogen inject the nitrogen injection valve Upstream section of pipeline.
As optimization, the feed pipe line segment in inlet control valve downstream is horizontal with the tee tube of feeding line downstream cascade
Interface section, and downlink is successively tilted with the discharge pipe line of tee tube horizontal interface section downstream cascade.From fed upstream pipeline, warp
Middle reaches tee tube horizontal interface section, until downstream drain pipeline successively tilts downlink.
As optimization, closed surge tank connects downwards lower semisphere by tubular body portion by upper hemispherical shell tank cap portion
Shell tank bottom part is constituted, and upper and lower liquid medium detection probe is separately mounted to the top of tubular body portion the same side under
Portion；Discharge pipe line end connection blow-down pipe or lower pressure vessel.Upper and lower liquid medium detection probe is separately mounted to tubular
Top and bottom in the middle part of body portion the same side, or upper and lower liquid medium detection probe are separately mounted to tubular can body
Below the upper end of part the same side and above lower end.
As optimization, elevated pressures container is equipped with the pressure transmitter or closed surge tank for the automatic controller that is electrically connected
Top and elevated pressures container are separately installed with pressure gauge of the pressure value display end configuration near nitrogen injection valve.Higher pressure
Force container installs the pressure transmitter and pressure gauge in its bottom.
The equipment of the method for the present invention forms as follows substantially: closed surge tank, inlet control valve, control feeding valve, pressure inspection
Survey sensor or pressure transmitter, upper and lower liquid medium detection probe or high liquid level, low liquid level detection sensor, nitrogen injection
Pipeline and manually or automatically control nitrogen injection valve.
The course of work of the method for the present invention: 1. close inlet control valve, the exhaust-control valve of surge tank, to closed surge tank
The nitrogen of interior injection certain pressure.2. the inlet control valve of surge tank is opened, the liquid medium in elevated pressures container is slow
It injects in closed surge tank, until liquid level reaches identified low level in advance, between closing surge tank and elevated pressures container
Inlet control valve.At this moment the pressure difference of surge tank and elevated pressures container is the maximum differential pressure of surge tank and elevated pressures container, is delayed
The pressure difference for rushing tank and the discharge pipe line downstream lower pressure vessel of connection is minimum differntial pressure.Downstream connection is lower for discharge pipe line
Pressure vessel.3. as needed, by injecting or discharging nitrogen, adjusting gas pressure in closed surge tank.Closed buffering tank deck
The nitrogen that portion's connection installs nitrogen relief valve discharges pipe, and release nitrogen is realized by operation nitrogen relief valve.4. opening buffering
The inlet control valve of tank, liquid medium enter in surge tank.When the pressure of gas in surge tank reaches predetermined value or surge tank
When interior liquid level rises to predetermined altitude, the inlet control valve of surge tank is closed；The pressure of surge tank and elevated pressures container at this time
Difference is minimum differntial pressure, and the pressure difference of surge tank and lower pressure vessel is maximum differential pressure.5. opening the discharge control of closed surge tank
Closed surge tank is discharged in valve, liquid medium.6. high and low liquid level can both be controlled by pressure parameter in closed surge tank,
Control can also be realized with the signal of medium detection probe or medium detection sensor.
Liquid medium in elevated pressures container can be effectively reduced in this way to lower pressure vessel conveying or Xiang great Qi
Flow velocity when discharge improves production security.
It is to preset gas in closed vessel pressure according to identified pressure difference needs in advance, will be in elevated pressures container
Liquid medium be transferred in closed surge tank, liquid medium again from closed surge tank to lower pressure vessel convey or Xiang great Qi
Discharge.
System for realizing the method for the present invention is that closed buffering pot bottom passes through a downward tee tube and is equipped with
The discharge pipe line connection of discharge control valve and be equipped with inlet control valve, it is upper even elevated pressures container bottom feeding line join
It is logical, it is separately installed with upper and lower liquid medium detection probe in the lower part of closed surge tank side and top, in closed surge tank
Top is installed by the nitrogen injection pipeline of one pressure transmitter and an installation nitrogen injection valve, pressure transmitter, charging respectively
Control valve and discharge control valve and liquid medium detection probe are electrically connected automatic controller respectively；Or pressure transmitter, charging control
Valve and discharge control valve processed and liquid medium detection probe and nitrogen injection valve are electrically connected automatic controller respectively.
Inlet control valve is opened when discharge, is pressed into liquid medium from elevated pressures container to the closed surge tank for prestoring nitrogen
The stopping feed pressure value of setting is risen to closed buffer tank pressure value or supreme liquid medium detection probe detects medium
When, close inlet control valve；Exhaust-control valve is opened, so that closed surge tank is pressed to discharge pipe line discharge liquid medium and delays to closed
It rushes pressure tank value and drops to setting and stop discharge pressure value or when can't detect liquid medium to lower liquid medium detection probe, close
Close exhaust-control valve.Downstream connection lower pressure vessel or evacuated tube, the low pressure vessel are that band top is arranged to discharge pipe line
The collecting tank of blank pipe or pressure limiting valve.The nitrogen of connection installation nitrogen relief valve discharges pipe at the top of closed surge tank.When with discharge
Flow at high speed and pipeline vibration will not be caused, be easy to measurement and control, the strong advantage of security reliability.
As optimization, according to the pressure value in elevated pressures container when discharge, manually or controller automatically opens nitrogen note
Enter valve and the nitrogen of relevant pressure is injected into closed surge tank, then nitrogen injection valve is automatically closed in manual or controller.
Operating mode has: A, according to the variation of the pressure value in closed surge tank, system sets a stopping charging first
Pressure value and stopping blowdown pressure value, open inlet control valve, set when detecting that the pressure value rising in closed surge tank reaches
When fixed stopping feed pressure value, inlet control valve is closed, starts discharge；When detecting that pressure value drops in closed surge tank
When the stopping blowdown pressure value of setting, discharge control valve is closed, stops discharge；B, according to be mounted on closed surge tank top and under
The detection probe in portion realizes the discharge of medium conveying: system is first turned on inlet control valve, when system detection to closed surge tank
When the upper liquid medium detection probe present position of side surface upper part is medium, system closes inlet control valve, stops charging；Then
System opens discharge control valve, starts discharge, when the lower liquid medium detection probe institute of system detection to closed surge tank lower part
Locate position be no medium when, system close discharge control valve stopping discharge.
As optimization, discharge pipe line, feeding line and nitrogen injection pipeline at least nitrogen injection pipeline on be equipped with only
Inverse valve.Discharge pipe line, feeding line and nitrogen injection pipeline at least feeding line and nitrogen injection pipeline on be equipped with it is non-return
Valve.Check (non-return) valve is fitted on discharge pipe line, feeding line and nitrogen injection pipeline.Check (non-return) valve is separately mounted to discharge pipe line
Discharge control valve tract, the inlet control valve Upstream section of feeding line, nitrogen inject the nitrogen injection valve Upstream section of pipeline.
As optimization, the feed pipe line segment in inlet control valve downstream is horizontal with the tee tube of feeding line downstream cascade
Interface section, and downlink is successively tilted with the discharge pipe line of tee tube horizontal interface section downstream cascade.From fed upstream pipeline, warp
Middle reaches tee tube horizontal interface section, until downstream drain pipeline successively tilts downlink.
As optimization, closed surge tank connects downwards lower semisphere by tubular body portion by upper hemispherical shell tank cap portion
Shell tank bottom part is constituted, and upper and lower liquid medium detection probe is separately mounted to the top of tubular body portion the same side under
Portion；Discharge pipe line end connection blow-down pipe or lower pressure vessel.Upper and lower liquid medium detection probe is separately mounted to tubular
Top and bottom in the middle part of body portion the same side, or upper and lower liquid medium detection probe are separately mounted to tubular can body
Below the upper end of part the same side and above lower end.
As optimization, elevated pressures container is equipped with the pressure transmitter or closed surge tank for the automatic controller that is electrically connected
Top and elevated pressures container are separately installed with pressure gauge of the pressure value display end configuration near nitrogen injection valve.Higher pressure
Force container installs the pressure transmitter and pressure gauge in its bottom.
The basic composition of present system is as follows: closed surge tank, inlet control valve, control feeding valve, pressure detecting pass
Sensor or pressure transmitter, upper and lower liquid medium detection probe or high liquid level, low liquid level detection sensor, nitrogen inject pipeline
And manually or automatically control nitrogen injection valve.
The course of work of present system: 1. close inlet control valve, the exhaust-control valve of surge tank, to closed surge tank
The nitrogen of interior injection certain pressure.2. the inlet control valve of surge tank is opened, the liquid medium in elevated pressures container is slow
It injects in closed surge tank, until liquid level reaches identified low level in advance, between closing surge tank and elevated pressures container
Inlet control valve.At this moment the pressure difference of surge tank and elevated pressures container is the maximum differential pressure of surge tank and elevated pressures container, is delayed
The pressure difference for rushing tank and the discharge pipe line downstream lower pressure vessel of connection is minimum differntial pressure.Downstream connection is lower for discharge pipe line
Pressure vessel.3. as needed, by injecting or discharging nitrogen, adjusting gas pressure in closed surge tank.Closed buffering tank deck
The nitrogen that portion's connection installs nitrogen relief valve discharges pipe, and release nitrogen is realized by operation nitrogen relief valve.4. opening buffering
The inlet control valve of tank, liquid medium enter in surge tank.When the pressure of gas in surge tank reaches predetermined value or surge tank
When interior liquid level rises to predetermined altitude, the inlet control valve of surge tank is closed；The pressure of surge tank and elevated pressures container at this time
Difference is minimum differntial pressure, and the pressure difference of surge tank and lower pressure vessel is maximum differential pressure.5. opening the discharge control of closed surge tank
Closed surge tank is discharged in valve, liquid medium.6. high and low liquid level can both be controlled by pressure parameter in closed surge tank,
Control can also be realized with the signal of medium detection probe or medium detection sensor.
Liquid medium in elevated pressures container can be effectively reduced in this way to lower pressure vessel conveying or Xiang great Qi
Flow velocity when discharge improves production security.
It is to preset gas in closed vessel pressure according to identified pressure difference needs in advance, will be in elevated pressures container
Liquid medium be transferred in closed surge tank, liquid medium again from closed surge tank to lower pressure vessel convey or Xiang great Qi
Discharge.
After adopting the above technical scheme, the present invention using closed surge tank realize high-pressure bottle in liquid medium low pressure,
Quantitative, intermittent discharge method and system have when discharge and flow at high speed and will not cause pipeline vibration, are easy to measurement and control, pacify
Complete highly reliable advantage.
Detailed description of the invention
Fig. 1 is that the present invention utilizes the low pressure of liquid medium, quantitative, intermittent discharge side in closed surge tank realization high-pressure bottle
The structural schematic diagram of method and system.
Specific embodiment
As shown, the present invention realizes that the low pressure of liquid medium in high-pressure bottle, quantitative, interval are arranged using closed surge tank
The method of putting is that closed 1 bottom of surge tank passes through a downward tee tube and the discharge pipe line 11 for being equipped with discharge control valve 21
It is logical and with 12 connection of feeding line that is equipped with inlet control valve 22, upper even 2 bottom of elevated pressures container, in closed surge tank 1
The lower part and top of side are separately installed with medium detection probe 31, lower medium detection probe 32, on the top of closed surge tank 1
Portion install respectively a pressure transmitter 4 and one installation nitrogen injection valve 23 nitrogen injection pipeline 13, pressure transmitter 4,
Inlet control valve 22 and discharge control valve 21 and upper medium detection probe 31, lower medium detection probe 32 are electrically connected automatic control respectively
Device 5；Or pressure transmitter 4, inlet control valve 22 and discharge control valve 21 and medium detection probe 31, upper medium detection probe
32 and nitrogen injection valve 23 be electrically connected respectively automatic controller 5.Inlet control valve is opened when discharge, from elevated pressures container to prestoring
The closed surge tank of nitrogen is pressed into the stopping feed pressure value or extremely that liquid medium to closed buffer tank pressure value rises to setting
When upper liquid medium detection probe detects medium, inlet control valve is closed；Exhaust-control valve is opened, closed surge tank is pressed to
Discharge pipe line discharge liquid medium to closed buffer tank pressure value drops to setting and stops discharge pressure value or to lower liquid medium
When detection probe can't detect liquid medium, exhaust-control valve is closed.Discharge pipe line downstream connection lower pressure vessel or is put
Blank pipe.Downstream connection lower pressure vessel or evacuated tube, the low pressure vessel are band top evacuated tube or limits to discharge pipe line
The collecting tank of pressure valve.Flow at high speed and pipeline vibration will not be caused when with discharge, be easy to measurement and control, security reliability is strong
The advantages of.
According to the pressure value in elevated pressures container when specific discharge, manual or controller automatically opens nitrogen injection valve will
The nitrogen of relevant pressure injects closed surge tank, and then nitrogen injection valve is automatically closed in manual or controller.
Operating mode has: 1. according to the variation of the pressure value in closed surge tank, system sets a stopping charging first
Pressure value and stopping blowdown pressure value, open inlet control valve, set when detecting that the pressure value rising in closed surge tank reaches
When fixed stopping feed pressure value, inlet control valve is closed, starts discharge；When detecting that pressure value drops in closed surge tank
When the stopping blowdown pressure value of setting, discharge control valve is closed, stops discharge；2. according to closed surge tank top is mounted on under
The detection probe in portion realizes the discharge of medium conveying: system is first turned on inlet control valve, when system detection to closed surge tank
When the medium detection probe present position of side surface upper part is medium, system closes inlet control valve, stops charging；Then system is beaten
It begins to rehearse and expects control valve, start discharge, when system detection to closed surge tank lower part medium detection probe present position is no medium
When, system closes discharge control valve and stops discharge.
Discharge pipe line 11, feeding line 12 and nitrogen injection pipeline 13 at least nitrogen injection pipeline 13 on be equipped with it is non-return
Valve.Discharge pipe line 11, feeding line 12 and nitrogen injection pipeline 13 at least feeding line 12 and nitrogen injection pipeline 13 on pacify
Equipped with check (non-return) valve.Check (non-return) valve is fitted on discharge pipe line 11, feeding line 12 and nitrogen injection pipeline 13.Check (non-return) valve is pacified respectively
Mounted in 21 tract of discharge control valve of discharge pipe line 11,22 Upstream section of inlet control valve, the nitrogen injection pipe of feeding line 12
23 Upstream section of nitrogen injection valve of line 13.
The feed pipe line segment in 22 downstream of inlet control valve, the tee tube horizontal interface with 12 downstream cascade of feeding line
Section, and downlink is successively tilted with the discharge pipe line of tee tube horizontal interface section downstream cascade.From fed upstream pipeline 12, in
Tee tube horizontal interface section is swum, until downstream drain pipeline 11 successively tilts downlink.
Closed surge tank 1 connects downwards lower hemisphere shell pot bottom by tubular body portion by upper hemispherical shell tank cap portion
Divide and constitute, upper medium detection probe 31, lower medium detection probe 32 are separately mounted to the top of tubular body portion the same side
The lower part and；Discharge pipe line end connection blow-down pipe or lower pressure vessel.Upper medium detection probe 31, lower medium detection probe 32
The top and bottom being separately mounted in the middle part of tubular body portion the same side or upper medium detection probe 31, the inspection of lower medium
Probing head 32 is separately mounted to below the upper end of tubular body portion the same side and above lower end.
Elevated pressures container is equipped at the top of the pressure transmitter or closed surge tank of the automatic controller that is electrically connected and higher
Pressure vessel is separately installed with pressure gauge of the pressure value display end configuration near nitrogen injection valve.Elevated pressures container is at it
Bottom is installed by the pressure transmitter and pressure gauge.
The equipment of the method for the present invention forms as follows substantially: closed surge tank, inlet control valve, control feeding valve, pressure inspection
Sensor or pressure transmitter, upper and lower medium detection probe or high liquid level, low liquid level detection sensor are surveyed, nitrogen injects pipeline
And manually or automatically control nitrogen injection valve.
The course of work of the method for the present invention: 1. close inlet control valve, the exhaust-control valve of surge tank, to closed surge tank
The nitrogen of interior injection certain pressure.2. the inlet control valve of surge tank is opened, the liquid medium in elevated pressures container is slow
It injects in closed surge tank, until liquid level reaches identified low level in advance, between closing surge tank and elevated pressures container
Inlet control valve.At this moment the pressure difference of surge tank and elevated pressures container is the maximum differential pressure of surge tank and elevated pressures container, is delayed
The pressure difference for rushing tank and the discharge pipe line downstream lower pressure vessel of connection is minimum differntial pressure.Downstream connection is lower for discharge pipe line
Pressure vessel.3. as needed, by injecting or discharging nitrogen, adjusting gas pressure in closed surge tank.Closed buffering tank deck
The nitrogen that portion's connection installs nitrogen relief valve discharges pipe, and release nitrogen is realized by operation nitrogen relief valve.4. opening buffering
The inlet control valve of tank, liquid medium enter in surge tank.When the pressure of gas in surge tank reaches predetermined value or surge tank
When interior liquid level rises to predetermined altitude, the inlet control valve of surge tank is closed；The pressure of surge tank and elevated pressures container at this time
Difference is minimum differntial pressure, and the pressure difference of surge tank and lower pressure vessel is maximum differential pressure.5. opening the discharge control of closed surge tank
Closed surge tank is discharged in valve, liquid medium.6. high and low liquid level can both be controlled by pressure parameter in closed surge tank,
Control can also be realized with the signal of medium detection probe or medium detection sensor.
Liquid medium in elevated pressures container can be effectively reduced in this way to lower pressure vessel conveying or Xiang great Qi
Flow velocity when discharge improves production security.It is to preset gas in closed vessel pressure according to identified pressure difference needs in advance
Liquid medium in elevated pressures container is transferred in closed surge tank by power, and liquid medium is again from closed surge tank to lower
Pressure vessel conveying is discharged to atmosphere.
As shown, the system for realizing the method for the present invention is that closed 1 bottom of surge tank passes through a downward threeway
Manage and be equipped with discharge control valve 21 11 connection of discharge pipe line and be equipped with inlet control valve 22, it is upper even elevated pressures container
12 connection of feeding line of 2 bottoms is separately installed with upper medium detection probe in the lower part of closed 1 side of surge tank and top
31, lower medium detection probe 32 installs a pressure transmitter 4 and an installation nitrogen at the top of closed surge tank 1 respectively
The nitrogen of injection valve 23 injects pipeline 13, and pressure transmitter 4, inlet control valve 22 and discharge control valve 21 and the detection of upper medium are visited
First 31, upper medium detection probe 32 is electrically connected automatic controller 5 respectively；Or pressure transmitter 4, inlet control valve 22 and discharge control
Valve 21 processed and medium detection probe 31, upper medium detection probe 32 and nitrogen injection valve 23 are electrically connected automatic controller 5 respectively.Discharge
When open inlet control valve, be pressed into liquid medium to closed surge tank from elevated pressures container to the closed surge tank for prestoring nitrogen
Pressure value rises to the stopping feed pressure value of setting or when supreme liquid medium detection probe detects medium, closes charging control
Valve processed；Exhaust-control valve is opened, presses to closed surge tank under discharge pipe line discharge liquid medium to closed buffer tank pressure value
When dropping to setting stopping discharge pressure value or can't detect liquid medium to lower liquid medium detection probe, emission control is closed
Valve.Downstream connection lower pressure vessel or evacuated tube, the low pressure vessel are band top evacuated tube or pressure limitings to discharge pipe line
The collecting tank of valve.The nitrogen of connection installation nitrogen relief valve discharges pipe at the top of closed surge tank.It will not high velocity stream when with discharge
It moves and causes pipeline vibration, be easy to measurement and control, the strong advantage of security reliability.
According to the pressure value in elevated pressures container when specific discharge, manual or controller automatically opens nitrogen injection valve will
The nitrogen of relevant pressure injects closed surge tank, and then nitrogen injection valve is automatically closed in manual or controller.
Operating mode has: 1. according to the variation of the pressure value in closed surge tank, system sets a stopping charging first
Pressure value and stopping blowdown pressure value, open inlet control valve, set when detecting that the pressure value rising in closed surge tank reaches
When fixed stopping feed pressure value, inlet control valve is closed, starts discharge；When detecting that pressure value drops in closed surge tank
When the stopping blowdown pressure value of setting, discharge control valve is closed, stops discharge；2. according to closed surge tank top is mounted on under
The detection probe in portion realizes the discharge of medium conveying: system is first turned on inlet control valve, when system detection to closed surge tank
When the medium detection probe present position of side surface upper part is medium, system closes inlet control valve, stops charging；Then system is beaten
It begins to rehearse and expects control valve, start discharge, when system detection to closed surge tank lower part medium detection probe present position is no medium
When, system closes discharge control valve and stops discharge.
Discharge pipe line 11, feeding line 12 and nitrogen injection pipeline 13 at least nitrogen injection pipeline 13 on be equipped with it is non-return
Valve.Discharge pipe line 11, feeding line 12 and nitrogen injection pipeline 13 at least feeding line 12 and nitrogen injection pipeline 13 on pacify
Equipped with check (non-return) valve.Check (non-return) valve is fitted on discharge pipe line 11, feeding line 12 and nitrogen injection pipeline 13.Check (non-return) valve is pacified respectively
Mounted in 21 tract of discharge control valve of discharge pipe line 11,22 Upstream section of inlet control valve, the nitrogen injection pipe of feeding line 12
23 Upstream section of nitrogen injection valve of line 13.
The feed pipe line segment in 22 downstream of inlet control valve, the tee tube horizontal interface with 12 downstream cascade of feeding line
Section, and downlink is successively tilted with the discharge pipe line of tee tube horizontal interface section downstream cascade.From fed upstream pipeline 12, in
Tee tube horizontal interface section is swum, until downstream drain pipeline 11 successively tilts downlink.
Closed surge tank 1 connects downwards lower hemisphere shell pot bottom by tubular body portion by upper hemispherical shell tank cap portion
Divide and constitute, upper medium detection probe 31, lower medium detection probe 32 are separately mounted to the top of tubular body portion the same side
The lower part and；Discharge pipe line end connection blow-down pipe or lower pressure vessel.Upper medium detection probe 31, lower medium detection probe 32
The top and bottom being separately mounted in the middle part of tubular body portion the same side or upper medium detection probe 31, the inspection of lower medium
Probing head 32 is separately mounted to below the upper end of tubular body portion the same side and above lower end.
Elevated pressures container is equipped at the top of the pressure transmitter or closed surge tank of the automatic controller that is electrically connected and higher
Pressure vessel is separately installed with pressure gauge of the pressure value display end configuration near nitrogen injection valve.Elevated pressures container is at it
Bottom is installed by the pressure transmitter and pressure gauge.
The basic composition of present system is as follows: closed surge tank, inlet control valve, control feeding valve, pressure detecting pass
Sensor or pressure transmitter, upper and lower medium detection probe or high liquid level, low liquid level detection sensor, nitrogen inject pipeline and hand
Dynamic or automatic control nitrogen injection valve.
The course of work of present system: 1. close inlet control valve, the exhaust-control valve of surge tank, to closed surge tank
The nitrogen of interior injection certain pressure.2. the inlet control valve of surge tank is opened, the liquid medium in elevated pressures container is slow
It injects in closed surge tank, until liquid level reaches identified low level in advance, between closing surge tank and elevated pressures container
Inlet control valve.At this moment the pressure difference of surge tank and elevated pressures container is the maximum differential pressure of surge tank and elevated pressures container, is delayed
The pressure difference for rushing tank and the discharge pipe line downstream lower pressure vessel of connection is minimum differntial pressure.Downstream connection is lower for discharge pipe line
Pressure vessel.3. as needed, by injecting or discharging nitrogen, adjusting gas pressure in closed surge tank.Closed buffering tank deck
The nitrogen that portion's connection installs nitrogen relief valve discharges pipe, and release nitrogen is realized by operation nitrogen relief valve.4. opening buffering
The inlet control valve of tank, liquid medium enter in surge tank.When the pressure of gas in surge tank reaches predetermined value or surge tank
When interior liquid level rises to predetermined altitude, the inlet control valve of surge tank is closed；The pressure of surge tank and elevated pressures container at this time
Difference is minimum differntial pressure, and the pressure difference of surge tank and lower pressure vessel is maximum differential pressure.5. opening the discharge control of closed surge tank
Closed surge tank is discharged in valve, liquid medium.6. high and low liquid level can both be controlled by pressure parameter in closed surge tank,
Control can also be realized with the signal of medium detection probe or medium detection sensor.
Liquid medium in elevated pressures container can be effectively reduced in this way to lower pressure vessel conveying or Xiang great Qi
Flow velocity when discharge improves production security.It is to preset gas in closed vessel pressure according to identified pressure difference needs in advance
Liquid medium in elevated pressures container is transferred in closed surge tank by power, and liquid medium is again from closed surge tank to lower
Pressure vessel conveying is discharged to atmosphere.
After adopting the above technical scheme, the present invention using closed surge tank realize high-pressure bottle in liquid medium low pressure,
Quantitative, intermittent discharge method and system have when discharge and flow at high speed and will not cause pipeline vibration, are easy to measurement and control, pacify
Complete highly reliable advantage.
Claims (10)
1. a kind of realize the low pressure of liquid medium in high-pressure bottle, quantitative, intermittent discharge method, feature using closed surge tank
Be closed buffering pot bottom by downward tee tube and the discharge pipe line connection for being equipped with discharge control valve and with peace
Feeding line connection equipped with inlet control valve, upper even elevated pressures container bottom, in the lower part of closed surge tank side and upper
Portion is separately installed with upper and lower liquid medium detection probe, the top of closed surge tank install respectively a pressure transmitter and
The nitrogen of one installation nitrogen injection valve injects pipeline, pressure transmitter, inlet control valve and discharge control valve and liquid medium
Detection probe is electrically connected automatic controller respectively；Or pressure transmitter, inlet control valve and discharge control valve and liquid medium are examined
Probing head and nitrogen injection valve are electrically connected automatic controller respectively；
Inlet control valve is opened when discharge, is pressed into liquid medium to close from elevated pressures container to the closed surge tank for prestoring nitrogen
Buffer tank pressure value is closed to rise to the stopping feed pressure value of setting or when supreme liquid medium detection probe detects medium, close
Close inlet control valve；Exhaust-control valve is opened, so that closed surge tank is pressed to discharge pipe line and discharges liquid medium to closed surge tank
When pressure value drops to setting stopping discharge pressure value or can't detect liquid medium to lower liquid medium detection probe, the row of closing
Put control valve.
2. method according to claim 1, it is characterised in that according to the pressure value in elevated pressures container when discharge, manually or
Controller, which automatically opens nitrogen injection valve, will be less than the closed surge tank of nitrogen injection of elevated pressures container inner pressure value, then hand
Nitrogen injection valve is automatically closed in dynamic or controller；
Operating mode has: A, according to the variation of the pressure value in closed surge tank, system sets a stopping feed pressure first
Value and stopping blowdown pressure value, open inlet control valve, reach setting when detecting that the pressure value in closed surge tank rises
When stopping feed pressure value, inlet control valve is closed, starts discharge；When detecting that pressure value drops to setting in closed surge tank
Stopping blowdown pressure value when, close discharge control valve, stop discharge；B, basis is mounted on closed surge tank upper and lower part
Detection probe realizes the discharge of medium conveying: system is first turned on inlet control valve, when system detection to closed surge tank side
When the upper liquid medium detection probe present position on top is medium, system closes inlet control valve, stops charging；Then system
Discharge control valve is opened, discharge is started, the position locating for lower liquid medium detection probe of the system detection to closed surge tank lower part
When being set to no medium, system closes discharge control valve and stops discharge.
3. method according to claim 1, it is characterised in that at least nitrogen in discharge pipe line, feeding line and nitrogen injection pipeline
Check (non-return) valve is installed on gas injection pipeline.
4. method according to claim 1, it is characterised in that the feed pipe line segment in inlet control valve downstream, under feeding line
The tee tube horizontal interface section of end cascade is swum, and under successively tilting with the discharge pipe line of tee tube horizontal interface section downstream cascade
Row.
5. method according to claim 1, it is characterised in that closed surge tank passes through tubular by upper hemispherical shell tank cap portion
Body portion connects downwards lower hemisphere shell tank bottom part composition, and upper and lower liquid medium detection probe is separately mounted to tubular tank
The upper and lower part of body part the same side；Discharge pipe line end connection blow-down pipe or lower pressure vessel.
6. a kind of system for realizing claim 1 the method, it is characterised in that closed buffering pot bottom by one to
Under tee tube be equipped with discharge control valve discharge pipe line connection and be equipped with inlet control valve, it is upper even elevated pressures hold
The feeding line connection of device bottom is separately installed with upper and lower liquid medium detection in the lower part of closed surge tank side and top
Probe installs the nitrogen injection pipe an of pressure transmitter and an installation nitrogen injection valve at the top of closed surge tank respectively
Line, pressure transmitter, inlet control valve and discharge control valve and liquid medium detection probe are electrically connected automatic controller respectively；Or
Pressure transmitter, inlet control valve and discharge control valve and liquid medium detection probe and nitrogen injection valve are electrically connected automatic control respectively
Device processed；
Inlet control valve is opened when discharge, is pressed into liquid medium to close from elevated pressures container to the closed surge tank for prestoring nitrogen
Buffer tank pressure value is closed to rise to the stopping feed pressure value of setting or when supreme liquid medium detection probe detects medium, close
Close inlet control valve；Exhaust-control valve is opened, so that closed surge tank is pressed to discharge pipe line and discharges liquid medium to closed surge tank
When pressure value drops to setting stopping discharge pressure value or can't detect liquid medium to lower liquid medium detection probe, the row of closing
Put control valve.
7. system according to claim 6, it is characterised in that according to the pressure value in elevated pressures container when discharge, manually or
Controller, which automatically opens nitrogen injection valve, will be less than the closed surge tank of nitrogen injection of elevated pressures container inner pressure value, then hand
Nitrogen injection valve is automatically closed in dynamic or controller；
Operating mode has: A, according to the variation of the pressure value in closed surge tank, system sets a stopping feed pressure first
Value and stopping blowdown pressure value, open inlet control valve, reach setting when detecting that the pressure value in closed surge tank rises
When stopping feed pressure value, inlet control valve is closed, starts discharge；When detecting that pressure value drops to setting in closed surge tank
Stopping blowdown pressure value when, close discharge control valve, stop discharge；B, basis is mounted on closed surge tank upper and lower part
Detection probe realizes the discharge of medium conveying: system is first turned on inlet control valve, when system detection to closed surge tank side
When the upper liquid medium detection probe present position on top is medium, system closes inlet control valve, stops charging；Then system
Discharge control valve is opened, discharge is started, the position locating for lower liquid medium detection probe of the system detection to closed surge tank lower part
When being set to no medium, system closes discharge control valve and stops discharge.
8. system according to claim 6, it is characterised in that at least nitrogen in discharge pipe line, feeding line and nitrogen injection pipeline
Check (non-return) valve is installed on gas injection pipeline.
9. system according to claim 6, it is characterised in that the feed pipe line segment in inlet control valve downstream, under feeding line
The tee tube horizontal interface section of end cascade is swum, and under successively tilting with the discharge pipe line of tee tube horizontal interface section downstream cascade
Row.
10. system according to claim 6, it is characterised in that closed surge tank passes through tubular by upper hemispherical shell tank cap portion
Body portion connects downwards lower hemisphere shell tank bottom part composition, and upper and lower liquid medium detection probe is separately mounted to tubular tank
The upper and lower part of body part the same side；Discharge pipe line end connection blow-down pipe or lower pressure vessel.
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| CN113946167B (en) * | 2021-09-07 | 2023-06-30 | 洛阳双瑞万基钛业有限公司 | Liquid level control device and control method for titanium sponge reactor |
| CN114484276B (en) * | 2022-04-14 | 2022-06-24 | 山东神驰化工集团有限公司 | Leakage-proof water injection system for liquefied hydrocarbon and water injection method thereof |
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