CN208283037U - A kind of tank leak Flash tank behavioral trait experiment test device - Google Patents
A kind of tank leak Flash tank behavioral trait experiment test device Download PDFInfo
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- CN208283037U CN208283037U CN201820893407.5U CN201820893407U CN208283037U CN 208283037 U CN208283037 U CN 208283037U CN 201820893407 U CN201820893407 U CN 201820893407U CN 208283037 U CN208283037 U CN 208283037U
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Abstract
The utility model relates to a kind of tank leak Flash tank behavioral trait experiment test devices, including testing main system, nitrogen compression system, water charging system, control and five parts of display system and measurement and data collection system etc., the wherein experiment main system, nitrogen compression system, water charging system passes through data line respectively and connect with control and display system, the nitrogen compression system, water charging system is connect with the experiment main system top compression hole and fill hole respectively by pipeline, the measurement and data collection system are set to the downstream of nozzle in the experiment main system.The utility model has the following beneficial effects: simple and convenient, security performance is high, and measurement means are advanced, research factor multiplicity, can be used for studying a variety of leakage environment, it is different store and leak condition under tank leak Flash tank behavioral trait problem.
Description
Technical field
The utility model relates to chemical industry safety, and in particular to a kind of tank leak Flash tank behavioral trait experiment test dress
It sets.
Background technique
At present in chemical company, production, storage and transportational process of oil product etc. are in high pressure superheater shape mostly
State, the key to its management are to prevent accidental release.Overheat (supercooling) liquid of storage tank storage is in thermodynamics injustice
Weighing apparatus state, belongs to metastable state, if slightly disturbed, it will the energy balance that violent phase transformation is maintained itself occurs.Storage
Higher than the pressure vessel storage tank of the superheated liquid of room temperature boiling point, tank skin surface may occur due to various possible causes crack or
Aperture, so that the abrupt pressure reduction at the interface of crack or aperture, will dash forward under metastable condition superheated liquid
Become, violent boiling occurs immediately, flash evapn forms gas, releases big energy, that is, flash, and formation contains drop
With the two-phase Flash tank of steam mixture, it will lead to the Accidents Disasters such as fire, explosion and poisoning.
Currently, the research about two-phase Flash tank focuses primarily upon the fields such as automotive fuel flash distillation and sea water desalination,
The spray characteristics of main research fuel or seawater, to improve engine efficiency or sea water desalination efficiency, it is therefore an objective to which how more research
It is strong phase-state change present in good utilisation two-phase Flash tank to promote the development of relevant art, is limited in that it grinds
Study carefully and is only limitted to Flash tank in internal combustion engine fuel chamber or the indoor atomization process of flash distillation and atomizing effect.
Currently, a large amount of experimental study is not yet carried out in terms of superheated liquid storage tank two-phase release in chemical industry security fields,
Flow behavior and rule and evolution mechanism for Flash tank diffusion not yet form unified theoretical system, and difference research is learned
For the model that person is established there are biggish difference, specific aim is stronger, thus there is significant limitation in use, theoretical developments
It is not perfect, lack corresponding technical solution.Chinese invention patent (application number 201310523173.7, publication number
CN103527934A a kind of pipe leakage experimental provision and experimental method and the utility model) announced on technological layer more
It is close.The invention is suitable for research pipeline or storage tank air-liquid and gas-liquid mixed phase stable state under a variety of different leakage working conditions
With the feature and rule of dynamic leakage, technology path are as follows:
1) under the experiment condition that initial pressure is P, the leak cross-sectional area of temperature T, leakage unit is S, pass through
Gas steady state leakage rate equation calculates gas in the mass leakage rate Q of the leak of leakage unit.
2) under the experiment condition that initial pressure is P, the leak cross-sectional area of temperature T, leakage unit is S, mould
Quasi- scene leakage process, metering obtain the mass leakage rate Q of leakIt is real。
3) reset initial pressure, temperature, leakage unit leak cross-sectional area value, repeat the above steps 1),
2) calculated value and actual value of multiple groups leak mass leakage rate, are obtained；
The calculated value and actual value of comparison gas or liquid quality leak rate, quantitative description discharge coefficient and initial pressure
Power, temperature, the relationship of leak sectional area obtain the correction model of leak rate formula.
There are following major defects for the technical solution of above-mentioned patent:
1) Flash tank behavioral trait is not considered
Leakage process in the invention under different leakage working conditions is not related to phase-state change, and wherein gas-liquid mixed phase is let out
Leakage is only limitted under stable state, and the gas-liquid two-phase coexisted leaks under different working conditions, is not suitable for storage in metastable
Determine the two-phase release that the superheated liquid of state occurs under different leakage working conditions；Flash tank flowing diffusion row can not be carried out
It is regular for characteristic and dynamic evolution, such as: speed and change of size rule, the temperature of drop in shape of plasma jet changing rule, jet stream
Distribution and coverage prediction etc..
2) research factor is single
The invention is confined to the leak rate at research leakage process leakage hole, is only applicable to study different leakage operating condition items
The mass leakage rate of air-liquid and gas-liquid mixed phase stable state and dynamic leakage, does not consider other factors pair in leakage process under part
The influence of leakage process, such as: pressure change, temperature change, phase-state change, medium spread dispersal behavior factor, thus can not
Accurately, comprehensively understand accident impact range caused by dynamic leakage process and leakage, so that research factor is single, it cannot
Comprehensive support data are provided for the prevention, control and reply of leakage accident.
3) leakage hole pattern is very little
The shape of leakage hole is only bar shaped and circle in the invention, and size is single, is let out without reference to other different types
Influence of the leak to leakage process, it is impossible to be used in (leakage mouth-shaped, size) leakage under a variety of different leakage working conditions of research
The dynamic change of process.
4) complicated for operation
In the operating process entirely tested, the equipment such as manual operation valve are both needed to simulate tank leak, are not controlled automatically
System processed increases the complexity of operation, and increases human factor to a certain extent and produce on experimental data measures
Raw influence；And there are certain time delays for manual operation, cannot reflect the instantaneity of practical storage tank rupture and leakage.
5) lack safety attachment
Entire experimental provision is without the safety devices such as safety valve, emergency stop push button and attachment, if occurring in experimentation prominent
Hair event cannot ensure the safety of operator.
Summary of the invention
For design defect existing for current patent of invention and research fail consider Flash tank behavioral trait, research because
Element is single and leakage working condition (leakage mouth-shaped, size) is very few etc. problem, the utility model are intended to provide a kind of behaviour
Make simple, highly-safe, applied widely, the comprehensive tank leak Flash tank behavioral trait experiment test experiments of research contents
Analog platform can be used in studying (leakage under a variety of environment, different conditions of storage (storage temperature, pressure), different leak conditions
Mouth-shaped, size) tank leak Flash tank behavioral trait (Flash tank Variation Regularity of Morphological Characteristics, Flash tank dynamic evolution rule
Rule etc.) simulation experiment platform.
To solve the above problems, the utility model provides a kind of tank leak Flash tank behavioral trait experiment test dress
It sets, which is characterized in that including experiment main system, nitrogen compression system, water charging system, control and display system and measurement and data
Acquisition system, the experiment main system, nitrogen compression system, water charging system pass through data line and control respectively and display system connects
It connects, the nitrogen compression system, water charging system pass through pipeline respectively and connect with input terminal at the top of the experiment main system, the survey
Amount and data collection system are located at the output end of experiment main system lower part and are connect by data line with experiment main system.
Preferably, the experiment main system includes storage tank, high pressure magnetic double level gauge, leakage pipe and bracket, the storage
Tank is located above the bracket, and the high pressure magnetic double level gauge is located on the lateral wall of the storage tank and by data line and institute
Control and display system connection are stated, the tank top is equipped with drain hole, pressure transmitter hole, fill hole and pressurization hole, above-mentioned
Four holes add with emptying pneumatic control valve, pressure transmitter, the water charging system and the nitrogen being located on the outside of the storage tank respectively
Pressure system is correspondingly connected with；The tank bottom be equipped with mudhole, thermocouple hole, leak and bottoming hole, the thermocouple hole and
The bottoming hole respectively be located at the tank inside tank in temperature thermocouple and heating rod be correspondingly connected with, the mudhole and
The leak is correspondingly connected with the blowdown pneumatic control valve and leakage pipe being located at outside the storage tank respectively；The blow-by tube
The outlet end in road is equipped with nozzle, exports extreme direction to it on the leakage pipe and is successively arranged pipeline temperature thermocouple, injection gas
Dynamic control valve and nozzle.
Wherein, the heating rod, emptying pneumatic control valve, blowdown pneumatic control valve and injection pneumatic control valve pass through data
Line is connected with control and display system, and temperature thermocouple, pipeline temperature thermocouple, pressure transmitter pass through number respectively in the tank
It is connect according to line with the control and display system, measurement and data collection system.When experiment, if tank internal pressure is more than
20bar, then emptying pneumatic control would automatically turn on carry out pressure release, ensure experiment safety.
The bracket is used to support experiment storage tank and leakage pipe, idler wheel is equipped with below the bracket, idler wheel is with locked
Any one idler wheel with locking function in the prior art can be used in function；After choosing the position of placement, idler wheel is locked
It is fixed, it flexibly moves and can fix at any time convenient for experiment main system；Each attachment is all made of stainless steel material, and heatproof is not less than
200 DEG C, pressure resistance is not less than 2.4MPa；The junction of each attachment and storage tank aperture all has good heatproof, pressure resistance and sealing.
On leakage pipe, pipeline temperature thermocouple, injection pneumatic control valve, nozzle etc. junction all have good heat resisting and pressure resisting and
Sealing.
Preferably, the lateral wall of the storage tank is equipped with insulating layer, and heat insulating mattress is equipped between the bottom and the bracket；
The heat insulating mattress is installed between tank bottom and bracket, and for reducing the heat dissipation between tank bottom and bracket, it is exhausted to play heat preservation
Heat effect.
Preferably, the nitrogen compression system includes nitrogen cylinder, pressure reducing valve, control valve, check valve and the pneumatic control of pressurization
Valve processed, the nitrogen cylinder are connect by high-pressure hose with the experiment main system, on the high-pressure hose from nitrogen cylinder to
Input extreme direction is successively arranged pressure reducing valve, control valve, pressurization check valve and pressurization pneumatic control valve at the top of experiment main system.
Wherein pressurization pneumatic control valve is connected by data line with control and display system.Nitrogen cylinder need to be solid with frame
Fixed, equipment and pipeline are supported by bracket, and supporting structure is similar to experiment main system structure, are also included lockable idler wheel, are made nitrogen
Gas cylinder flexibly can be moved and can be fixed at any time.
Preferably, the water charging system includes water tank and high pressure small pump, is equipped with moisturizing activity below the water tank
Bracket, top, centre and the bottom of the water tank are successively arranged water filling port, water outlet and discharge outlet, the water filling port and row
The mouth of a river is corresponding to be equipped with water inlet control valve and draining control valve, and the water outlet and experiment main system input terminal pass through moisturizing pipeline
It connects, input extreme direction is successively arranged replenishment check valve I, high pressure at the top of from water outlet to experiment main system in the moisturizing pipeline
Small pump, replenishment check valve II and moisturizing pneumatic control valve；The water tank lateral wall be equipped with liquidometer, the liquidometer,
Moisturizing pneumatic control valve passes through data line respectively and connect with control and display system.
The moisturizing movable support is used to support water tank and pipeline above it, the structure of moisturizing movable support with it is described
The supporting structure for testing main system is similar, and idler wheel is equipped with below moisturizing movable support, and idler wheel has locking function, can be used existing
Any one in technology has the idler wheel of locking function；After choosing the position of placement, locked idler wheel can be fixed, and be convenient for moisturizing system
System is flexibly mobile and can fix at any time.
Preferably, the measurement and data collection system include Particle dynamic analyzer, high-speed camera, Flash tank survey
Galvanic couple, data acquisition module and computer are warmed, the downstream of the experiment main system output end is equipped with several Flash tank temperature
Degree measurement thermocouple, high-speed camera and Particle dynamic analyzer, several Flash tank temperature thermocouples are separately connected
The data acquisition module, the data acquisition module, high-speed camera and Particle dynamic analyzer pass through respectively data line with
The computer connection.
Preferably, it is described control and display system include control cabinet, the control cabinet be equipped with PLC host, control module,
Liquid crystal operation screen, power supply knob, emergency stop push button and power supply indicator；The PLC host and control module are fixed on control
Mutually it is connected inside cabinet and by data line；The liquid crystal operation screen, power supply knob, emergency stop push button and power supply indicator are embedding
It is located on the control cabinet operating surface and is connect respectively by data line with the control module.
Tank leak Flash tank behavioral trait experimental method is carried out by using above-mentioned test device, the steps include:
1) power supply and air circuit connection: experimental provision is connected to by the electric wiring between connection each system of experimental provision
On 380V three-phase alternating current；It connects nitrogen compression system and tests between gas circuit and each pneumatic control valve between main system
Gas circuit；
2) water charging system fills the water: closing the water outlet and discharge outlet of water charging system, fills the water into water charging system；When water plus
To water charging system volume 80 ~ 90% when, close water filling port valve, stop water filling；
3) it tests main system moisturizing: first ensuring that each valve is in pass in experiment main system before carrying out water-refilling operation
Closed state, then the setting experiment main system liquid level in control and display system, then carry out moisturizing；When experiment main system liquid
When position reaches setting value, control and display system will automatically control and stop moisturizing；
4) experiment main system pressurization: carrying out pressurized operation to it after experiment main system moisturizing, is controlling and showing system
Pressure value needed for setting experiment main system is tested in system, when pressure reaches setting value in experiment main system, control and display system
System, which will automatically control, stops pressurization；
5) it heats: after the completion of testing main system moisturizing, pressurization, the setting experiment required temperature in control and display system
Value heats experiment main system internal water, the water tested in main system is made to reach superheat state；When temperature in experiment main system
When degree reaches preset value, control and display system control stop heating；After the completion of heating, if water temperature reduces by 5 in experiment main system
DEG C, then control and display system start heating automatically, are heated to set temperature value；
6) bursting: after experiment setting liquid level, pressure and temperature are adjusted, clicking " injection " in liquid crystal operation screen,
The control valve of experiment main system output end is opened, two-phase release experiment is carried out；
7) Flash tank parameter measurement: by Particle dynamic analyzer in measurement and data collection system, high-speed camera and
Several thermocouples are set in nozzle downstream along jet path, measure the partial size and three-dimensional velocity of drop in Flash tank respectively
The regularity of distribution, Variation Regularity of Morphological Characteristics and temperature changing regularity；
8) cleaning and blowdown cleaning and blowdown: are carried out to water charging system and experiment main system
A kind of tank leak Flash tank behavioral trait experiment test device described in the utility model, its advantages
Are as follows:
1) whole experiment process is simple and convenient, high degree of automation, reduces the fault of personnel's operation.It only needs to pass through liquid
Brilliant operator control panel operation, sets in control software systems and tests the parameters such as required liquid level, pressure and temperature in storage tank, work as storage
After parameters reach setting value in tank, system will be automatically stopped corresponding operation, can carry out two-phase release experiment later, directly
Superheated liquid all leaks in storage tank.
2) measurement means are advanced.Using Three-Dimensional Dynamic particle analyzer, two-phase particle speed in Flash tank after capture leakage
The distributed in three dimensions feature of degree, partial size, so as to realize that the stream of two-phase release Flash tank is grasped and understood to more comprehensive, system
Dynamic feature；
When measuring two-phase release Flash tank parameter, only each survey set on software need to be controlled in Particle dynamic analyzer
It the position of point, the number of samples of each measuring point and sampling time, can measure automatically, whole process does not need any outside
Manual operation, therefore the error that human factor generates in experimental data measurement can be reduced, improve the precision of data.
3) research factor multiplicity.The utility model can study a variety of conditions of storage (different storage mediums, filling weight, temperature,
Pressure etc.), leak condition (different spray nozzles shape, size etc.) and leakage environment under two-phase release problem.
4) security performance is improved.The utility model is equipped with maltilevel security safeguard, equipped with safe emptying, stops in emergency
Equal safety devices can effectively avoid and the burst fortuitous events such as personal injury, equipment is impaired occur in experimental implementation process.
Detailed description of the invention
In order to make the content of the utility model be easier to be clearly understood, below according to specific embodiment and combine attached
Figure, is described in further detail the utility model.
Fig. 1 is the utility model schematic view of the front view.
Fig. 2 is operating process schematic diagram.
Fig. 3 is the storage tank the schematic diagram of the section structure.
Wherein: 1- is controlled and display system, 2- experiment main system, 20- insulating layer, 21- storage tank, thermometric thermoelectricity in 210- tank
It is even, 211- pressurization hole, 212- drain hole, 213- pressure transmitter hole, 214- fill hole, 215- thermocouple hole, 216- mudhole,
217- leak, 218- bottoming hole, 219- heating rod, 22- high pressure magnetic double level gauge, 23- leakage pipe, 231- pipeline thermometric
Thermocouple, 232- spray pneumatic control valve, 233- nozzle, 24- bracket, 25- heat insulating mattress, 26- emptying pneumatic control valve, 27- pressure
Power transmitter, 28- blowdown pneumatic control valve, 3- nitrogen compression system, 31- nitrogen cylinder, 32- pressure reducing valve, 33- control valve,
34- check valve, 35- pressurization pneumatic control valve, 36- high-pressure hose, 4- water charging system, 41- water tank, 411- water inlet control valve,
412- blowdown control valve, 42- high pressure small pump, 43- replenishment check valve, 44- moisturizing pneumatic control valve, 45- moisturizing pipeline, 46-
Moisturizing liquidometer, 47- moisturizing movable support, 5- measurement and data collection system, 51- Particle dynamic analyzer, 52- high-speed photography
Instrument, 53- Flash tank temperature thermocouple, 54- data acquisition module, 55- computer.
Specific embodiment
As shown in Figure 1-3, a kind of tank leak Flash tank behavioral trait experiment test device, including control and show and be
System 1, and pass through experiment main system 2, nitrogen compression system 3, moisturizing system that data line is connect with control and display system 1 respectively
System 4, measurement and data collection system 5；Wherein the water charging system 4, nitrogen compression system 3 respectively with the experiment main system 2
The input terminal at top connects, and the measurement and data collection system 5 are located at the output end of experiment 2 lower part of main system and pass through data
Line is connect with the experimental system 2.
As shown in Figures 1 and 3, the experiment main system 2 includes storage tank 21, high pressure magnetic double level gauge 22, leakage pipe
23 and bracket 24；21 diameter of storage tank is 261mm, is highly 300mm, volume 20L, maximum operating temperature >=200 DEG C,
Maximum working pressure >=2.4MPa, the lower section that the bracket 24 is located at storage tank 21 are used to support storage tank and leakage pipe；The storage
Heat insulating mattress 25 is additionally provided between tank 21 and the bracket 23, the hole of 21 top center of storage tank is spare hole, it is blocked with loose joint,
It is respectively the pressurization hole 211 of 10mm, 20mm, 20mm, 25mm, drain hole 212, pressure transmitter that diameter is equipped with around spare hole
Hole 213 and fill hole 214, aforementioned four hole respectively be located at outside the storage tank 21 nitrogen compression system 3, the pneumatic control of emptying
Valve 26 processed, pressure transmitter 27, the water charging system 4 are correspondingly connected with；The bottom of the storage tank 21 be equipped with diameter be respectively 10mm,
Thermocouple hole 215, mudhole 216, leak 217 and the bottoming hole 218 of 20mm, 25mm, 15mm, wherein the bottoming hole 218
Be 4, other holes are 1, thermocouple hole 215 and 4 bottoming hole 218 respectively be located inside the storage tank 21
Tank in temperature thermocouple 210 and 4 heating rods 219 be correspondingly connected with, the mudhole 216 be located at outside the storage tank 21
Blowdown pneumatic control valve 28 connects, and the leakage pipe 29 connects bend pipe by leak and draws, and the leakage pipe 29 is not using
Steel material of becoming rusty and heatproof are not less than 200 DEG C, are pressure-resistant not less than 2.4MPa, are fixed on bracket.
23 length of leakage pipe is 500mm, is arranged on leakage pipe 23 away from aperture at bend pipe horizontal distance 200mm
One temperature point is inserted into the pipeline temperature thermocouple model Omega used in pipeline temperature thermocouple 231(the present embodiment
TC-K-1/8NPT-U-72) measurement leakage temperature；This reality of pneumatic control valve 232(is sprayed away from being equipped at bend pipe horizontal distance 500mm
Apply the model YV-3H-1000-DN25 used in example), the end of leakage pipe 29 is equipped with nozzle 233, the nozzle 233 away from
Vertical height from the ground is 700mm；The nozzle 233 can be used for simulating tank leak hole, replaceable difference size or shape
Nozzle simulate different leak conditions, injection pneumatic control valve is for quickly controlling the switch of nozzle, simulation storage tank rupture.
The high pressure magnetic double level gauge 22(model BI-DS15-2.5M-300) pass through flanged joint in the storage tank
It is connect on 21 lateral wall and by data line with the control and display system 1；The lateral wall of the storage tank 21, which is equipped with, to be protected
Warm layer 20, the insulating layer 20 is outer to be wrapped up by stainless steel sheet|, and storage tank temperature drop in 2-3 hours can be made to be no more than 5 DEG C.
The nitrogen compression system 3 includes that nitrogen cylinder 31, pressure reducing valve 32, control valve 33, check valve 34 and pressurization are pneumatic
Control valve 35, the nitrogen cylinder 31 is connect by high-pressure hose 36 with the pressurization hole 211 of the storage tank, on the high-pressure hose
Pressure reducing valve 32, control valve 33, pressurization check valve 34 and pressurization pneumatic control valve are successively arranged from nitrogen cylinder to the pressurization hole
35。
The main purpose of nitrogen compression system is the pressure size in control experiment main system storage tank, when experiment, starts nitrogen
Gas compression system observes the pressure in storage tank by pressure transmitter, when reaching experimental pressure, stops gas supply, to reach
Control the purpose of pressure in storage tank.
Pipeline and other attachmentes in nitrogen compression system are all made of pressure high-temp resistant and anti-corrosion material, and heatproof is not less than
200 DEG C, pressure resistance is not less than 2.4MPa；In the junction of compression system pipeline and storage tank, it is ensured that have good pressure-resistant and close
Envelope, while the connection between each attachment in other positions will also guarantee pressure resistance and sealing.
The water charging system 4 includes water tank 41 and high pressure small pump 42, the high pressure moisturizing used in the present embodiment
The model CDLF2-220 of pump；Water tank 41 is made of 314 stainless steels, volume 300L, having a size of 600mm × 1500mm,
For storing test medium, effect is water tank 41: after the experiment of storage tank two-phase release, quickly supplementing experiment for storage tank
Medium carries out next group of experiment；Top, centre and the bottom of the water tank 41 are successively arranged the water filling that diameter is 25mm
Mouth, water outlet and discharge outlet；The water filling port and discharge outlet are separately installed with water inlet control valve 411 and blowdown control valve 412, institute
It states water outlet to connect by moisturizing pipeline 45 with the fill hole of storage tank 21, is successively arranged replenishment check valve in the moisturizing pipeline 45
43, high pressure small pump 42 and moisturizing pneumatic control valve 44；The junction at moisturizing pipeline both ends and storage tank and water tank, it is ensured that tool
There are good pressure resistance and sealing, while the connection between each attachment in other positions will also guarantee pressure resistance and sealing；The water tank
41 lateral wall is equipped with moisturizing liquidometer 46, and the moisturizing liquidometer 46 is connect by data line with control and display system；
Entire water charging system equipment and pipeline have the support of moisturizing movable support 47.
The measurement and data collection system 5 include Particle dynamic analyzer 51, high-speed camera 52, Flash tank thermometric
Thermocouple 53, data acquisition module 54 and computer 55, the Particle dynamic analyzer 51, high-speed camera 52 and data acquisition module
Block 54 is connect with computer 55 by data line respectively；The downstream of the nozzle is equipped with several Flash tank temperature thermocouples
53；Several Flash tank temperature thermocouples 53 are separately connected data acquisition module 54, are used to measure the sudden strain of a muscle that leakage is formed
Steam the temperature distributing rule at the different location of jet stream downstream.
High-speed camera, Particle dynamic analyzer and Flash tank temperature thermocouple can be solid by mobilizable bracket
It is fixed；The bracket can also refer to the bracket of experiment main system, can flexibly move and can be by locking device locked and fixed；The high speed
Photographic apparatus 52 is located at nozzle exit, measures the jet path of camera lens perpendicular alignmnet Flash tank, is used to record and entirely let out
Flash tank metamorphosis during leakage；The Particle dynamic analyzer 51 is located at nozzle downstream, and 2 measuring probes are fixed on
On bracket and it is directed at Flash tank jet path, when two-phase release occurs for measuring storage tank, drop in the Flash tank of formation
Three-dimensional velocity and partial size the regularity of distribution.
The control and display system 1 include control cabinet 11, and the control cabinet 11 is equipped with PLC host, control module, liquid
Brilliant operator control panel, power supply knob, emergency stop push button and power supply indicator；The PLC host and control module are fixed on control cabinet
It is internal and mutually connected by data line；The liquid crystal operation screen, power supply knob, emergency stop push button and power supply indicator are embedded
It is connect on the control cabinet operating surface and respectively through data line with the control module.Two are equipped on the PLC host
Phase leakage experiment controls software systems, and storage tank moisturizing, heating, pressurization, bursting and safety can be carried out by liquid crystal display and is arranged
The operation such as sky, real-time display and situations such as record tank internal pressure, temperature, liquid level and water tank liquid level.
Wherein, test that the pressure transmitter in main system, temperature thermocouple and pipeline temperature thermocouple pass through respectively in pipe
Data line and data acquisition module connection and control are connect with display system；Temperature thermocouple is used in pressure transmitter and pipe
Real-time monitoring tank internal pressure and temperature condition, heating rod is connect by data line and control with display system, for heating
Tank inside water makes it reach superheat state in the case where setting experimental pressure；Moisturizing pneumatic control valve, pressurization pneumatic control valve, row
Dirty pneumatic control valve, emptying pneumatic control valve, injection pneumatic control valve pass through respectively in data line and control and display system
Control module connection.
Tank leak Flash tank behavioral trait experimental method, simulation tank leak flash distillation are carried out using above-mentioned test device
Jet behavior characteristic test, the steps include:
1) power supply and air circuit connection: experimental provision is connected to by the electric wiring between connection each system of experimental provision
On 380V three-phase alternating current；Connect in nitrogen compression system gas circuit between nitrogen cylinder and storage tank and each pneumatic control valve it
Between gas circuit；
2) water charging system moisturizing: the water outlet and discharge outlet of water tank in water charging system are closed, is filled the water into water charging system；
When water adds to the 80 ~ 90% of water tank volume, water filling port valve is closed, stops water filling；
4) it tests main system moisturizing: first ensuring that each valve is in pass in experiment main system before carrying out water-refilling operation
Closed state, then liquid level required in storage tank in setting experiment main system in control and display system, then carry out moisturizing；
When liquid level reaches setting value in storage tank, control and display system will automatically control and stop moisturizing；
5) experiment main system pressurization: carrying out pressurized operation to it after experiment main system moisturizing, is controlling and showing system
Pressure value needed for being tested in storage tank in setting experiment main system in system, when tank inner pressure reaches setting value, control and display
System, which will automatically control, stops pressurization；
6) it heats: after the completion of testing main system moisturizing, pressurization, the set temperature value in control and display system, to storage
Tank internal water is heated, and the water in storage tank is made to reach superheat state；When temperature reaches preset value in storage tank, control and display
System control stops heating；After the completion of heating, if water temperature reduces by 5 DEG C in storage tank, control and display system start heating automatically, add
Heat is to set temperature value；
7) bursting: after experiment setting liquid level, pressure and temperature are adjusted, confirm in liquid crystal operation screen point and carry out
" injection " operation, opens the injection pneumatic control valve on leakage pipe, carries out two-phase release experiment；
8) Flash tank parameter measurement: by Particle dynamic analyzer in measurement and data collection system, high-speed camera and
Several Flash tank warm galvanic couples are set in nozzle downstream along jet path, measure the partial size of drop in Flash tank respectively
With three dimensional velocity distribution rule, Variation Regularity of Morphological Characteristics and temperature changing regularity, flowed for superheated liquid two-phase release Flash tank
Behavior is special and Evolution provides important references；
The data that this experimental platform system need to acquire are mainly that tank inside liquid level, temperature and pressure and two-phase release dodge
Steam jet stream downstream temperature, metamorphosis, drop three-dimensional velocity and droplets size distribution；Data acquisition module model Keysight
U2331, sampling rate be 1 MSa/s, possessing has 16 channels, can 16 channel of high speed acquisition temperature data.High-speed camera can
Flash tank Variation Regularity of Morphological Characteristics in record leakage process in real time；Particle dynamic analyzer ((Phase Doppler
Anemometry, abbreviation PDA), can systematic survey spheroidal particle size, three-dimensional velocity and concentration；
9) cleaning and blowdown: the cleaning and blowdown of water tank: opening water tank water filling port valve, and injection suitable quantity of water carries out clear
It washes, then opens drain valve, blowdown terminates, and closes water discharging valve；The cleaning and blowdown of storage tank: first will inject suitable quantity of water in storage tank,
Storage tank blowdown pneumatic control valve is opened, blowdown operation is carried out.Blowdown terminates, and closes sewage draining valve.
The control of this experimental platform system and display system are mainly made of control cabinet, and control cabinet is based on PLC programmable control
(sea is H16S0T), DO module (H16DOR), AI/DI module (S04XA), liquid crystal operation screen, monolithic processor controlled number to host processed
The attachmentes such as regulation instrument and operation button form a small-sized DCS system, and simple to operate, experimental data can be with
Record saves.It is realized specifically, experiment at present is main: on liquid crystal operation screen, setting liquid level in storage tank, pressure and temperature
Degree, then successively clicks " moisturizing ", " pressurization ", " heating " and " injection " button, and control system will be grasped accordingly automatically
Make, the change of later experiments condition may need other control operations.It during the experiment, can be immediately if there are emergency situations
Pinning emergency stop push button makes system stalls.
When tank inner pressure or temperature reduce 1bar or 5 DEG C, system will be pressurizeed or be heated automatically, until storage
Pressure inside the tank or temperature are restored to experiment setting value；During the experiment, if tank inner pressure is more than 20bar, system will
It automatically controls and opens exhaust-valve progress pressure discharge operations, ensure experiment safety；When heating, if actual liquid level is lower than in storage tank
When setting liquid level 2cm, the automatic priming level of control system and heating interlocking to prevent heating rod dry combustion method, will be unable to carry out at this time
Heating operation can carry out heating operation until liquid level adds to experiment setting value in storage tank.
The foregoing is merely the preferred embodiment of the utility model, it is not intended as further limiting the utility model, it is all
Be various equivalence changes made based on the specification and figures of the utility model the protection scope of the utility model it
It is interior.
Claims (7)
1. a kind of tank leak Flash tank behavioral trait experiment test device, which is characterized in that including testing main system, nitrogen
Gas compression system, water charging system, control and display system and measurement and data collection system, the experiment main system, nitrogen add
Pressure system, water charging system pass through data line respectively and connect with control and display system, the nitrogen compression system, water charging system point
Not Tong Guo pipeline connect with input terminal at the top of the experiment main system, the measurement and data collection system, which are located at, tests main system
The output end of lower part is simultaneously connect by data line with experiment main system.
2. a kind of tank leak Flash tank behavioral trait experiment test device according to claim 1, which is characterized in that
The experiment main system includes storage tank, high pressure magnetic double level gauge, leakage pipe and bracket, and the storage tank is set on the bracket
Side, the high pressure magnetic double level gauge are located on the lateral wall of the storage tank and by data line and the control and display systems
Connection, the tank top be equipped with drain hole, pressure transmitter hole, fill hole and pressurization hole, aforementioned four hole respectively be located at
Emptying pneumatic control valve, pressure transmitter, water charging system and nitrogen compression system on the outside of the storage tank are correspondingly connected with；The storage
Pot bottom is equipped with mudhole, thermocouple hole, leak and bottoming hole, the thermocouple hole and bottoming hole respectively be located in storage tank
Temperature thermocouple and heating rod are correspondingly connected in the tank in portion, the mudhole and leak respectively with the blowdown that is located at outside storage tank
Pneumatic control valve and leakage pipe are correspondingly connected with；The outlet end of the leakage pipe is equipped with nozzle, to it on the leakage pipe
Outlet extreme direction is successively arranged pipeline temperature thermocouple, injection pneumatic control valve and nozzle.
3. a kind of tank leak Flash tank behavioral trait experiment test device according to claim 2, which is characterized in that
It is equipped with insulating layer outside the storage tank, heat insulating mattress is equipped between the tank bottom and the bracket.
4. a kind of tank leak Flash tank behavioral trait experiment test device according to claim 1, which is characterized in that
The nitrogen compression system includes nitrogen cylinder, pressure reducing valve, control valve, check valve and pressurization pneumatic control valve, the nitrogen steel
Bottle is connect by high-pressure hose with the experiment main system, defeated at the top of from nitrogen cylinder to experiment main system on the high-pressure hose
Enter extreme direction and is successively arranged pressure reducing valve, control valve, pressurization check valve and pressurization pneumatic control valve.
5. a kind of tank leak Flash tank behavioral trait experiment test device according to claim 1, which is characterized in that
The water charging system includes water tank and high pressure small pump, is equipped with moisturizing movable support, the water tank below the water tank
Top, centre and bottom be successively arranged water filling port, water outlet and discharge outlet, the water filling port and discharge outlet it is corresponding be equipped with into
Water control valve and draining control valve, the water outlet connect experiment main system input terminal, the moisturizing pipeline by moisturizing pipeline
On from water outlet to experiment main system at the top of input extreme direction be successively arranged replenishment check valve I, high pressure small pump, replenishment check valve
II and moisturizing pneumatic control valve；The water tank lateral wall be equipped with liquidometer, the liquidometer by data line and control and
Display system connection.
6. a kind of tank leak Flash tank behavioral trait experiment test device according to claim 1, which is characterized in that
The measurement and data collection system include that Particle dynamic analyzer, high-speed camera, Flash tank temperature thermocouple, data are adopted
Collect module and computer, the downstream of the experiment main system output end is equipped with several Flash tank temperature measuring thermocouples, height
Fast photographic apparatus and Particle dynamic analyzer, several Flash tank temperature thermocouples are separately connected the data acquisition module
Block, the data acquisition module, high-speed camera and Particle dynamic analyzer pass through data line respectively and connect with the computer.
7. a kind of tank leak Flash tank behavioral trait experiment test device according to claim 1, which is characterized in that
The control and display system include control cabinet, and the control cabinet is equipped with PLC host, control module, liquid crystal operation screen, power supply
Knob, emergency stop push button and power supply indicator；The PLC host and control module are fixed on inside control cabinet and pass through data
Line is mutually connected；The liquid crystal operation screen, power supply knob, emergency stop push button and power supply indicator are embedded to be grasped in the control cabinet
Make to connect on face and respectively by data line with the control module.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108956089A (en) * | 2018-06-11 | 2018-12-07 | 南京工业大学 | A kind of tank leak Flash tank behavioral trait experiment test device and method |
| CN109781176A (en) * | 2018-12-27 | 2019-05-21 | 西安交通大学 | Danger medium flash boiling spray two phase flow and mist generating device and test method |
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2018
- 2018-06-11 CN CN201820893407.5U patent/CN208283037U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108956089A (en) * | 2018-06-11 | 2018-12-07 | 南京工业大学 | A kind of tank leak Flash tank behavioral trait experiment test device and method |
| CN108956089B (en) * | 2018-06-11 | 2023-11-17 | 南京工业大学 | Storage tank leakage flash evaporation jet flow behavior characteristic experimental test device and method |
| CN109781176A (en) * | 2018-12-27 | 2019-05-21 | 西安交通大学 | Danger medium flash boiling spray two phase flow and mist generating device and test method |
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