CN108267479A - A kind of online steam wetness measurement system - Google Patents
A kind of online steam wetness measurement system Download PDFInfo
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- CN108267479A CN108267479A CN201611264938.XA CN201611264938A CN108267479A CN 108267479 A CN108267479 A CN 108267479A CN 201611264938 A CN201611264938 A CN 201611264938A CN 108267479 A CN108267479 A CN 108267479A
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- 238000005259 measurement Methods 0.000 title claims abstract description 37
- 238000010438 heat treatment Methods 0.000 claims abstract description 45
- 238000005070 sampling Methods 0.000 claims abstract description 39
- 230000001105 regulatory effect Effects 0.000 claims abstract description 13
- 238000010079 rubber tapping Methods 0.000 claims description 16
- 238000005485 electric heating Methods 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 230000003068 static effect Effects 0.000 claims description 8
- 238000009413 insulation Methods 0.000 claims description 7
- 239000012774 insulation material Substances 0.000 claims description 3
- 230000013011 mating Effects 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims 1
- 238000010025 steaming Methods 0.000 claims 1
- 238000000034 method Methods 0.000 description 15
- 238000005452 bending Methods 0.000 description 3
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000700 radioactive tracer Substances 0.000 description 3
- 235000014171 carbonated beverage Nutrition 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000008236 heating water Substances 0.000 description 1
- 230000003189 isokinetic effect Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/56—Investigating or analyzing materials by the use of thermal means by investigating moisture content
- G01N25/62—Investigating or analyzing materials by the use of thermal means by investigating moisture content by psychrometric means, e.g. wet-and-dry bulb thermometers
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The present invention is a kind of online steam wetness measurement system, is related to steam wetness measurement technical field.The present invention includes sampler, measuring device and its backstage TT＆C system, sampler and is connected with measuring device, and measuring device is controlled by backstage TT＆C system；Measuring device includes constant volume heating unit, regulating valve, pressure reducing valve, condensing unit, flowmeter, it is sequentially connected in series by pipeline, one group of solenoid valve, shut-off valve, sensor are respectively arranged in constant volume heating unit front-end and back-end, one group of sensor is respectively arranged in constant volume heating unit front end and end.The invention also includes caliberating device, for calibrating measuring device.Basic principle of the present invention according to thermodynamics constant volume heating, can realize online moisture measurement, improve the real-time and accuracy of steam wetness measurement；Design is using multifunction sampling head, it can be ensured that sampling head is in meets stream mode always, and can pass through dynamic pressure difference and calculate flow velocity.
Description
Technical field
The present invention relates to steam wetness measurement technical fields, and in particular to a kind of online steam wetness measurement system and side
Method.
Background technology
From the sixties in last century, diversification is presented in the research of steam wetness measurement method, but major part is all limited to
Under theoretical research or laboratory condition, the wider optical measuring method of opposite application, capacitance method, supercritical ultrasonics technology and microwave are humorous
Cell method of shaking etc. has use condition many requirements, is not suitable for the online steam of the internal structure complexity under high-temperature and high-pressure conditions
Moisture measurement.The classical thermodynamics method scope of application is wider, but measurement accuracy is poor.The widely used tracer of current nuclear power field
Method needs to be sampled Off-line calibration, could obtain humidity as a result, can not achieve on-line measurement.
Invention content
The present invention provides a kind of online steam wetness measurement system and method, is particularly suitable under high-temperature and high-pressure conditions
Steam wetness measurement.The present invention in complicated measuring environment, can effectively improve steam moisture under high-temperature and high-pressure conditions
The real-time and accuracy of measurement.
The technical scheme is that：
A kind of online steam wetness measurement system, including sampler, measuring device and its backstage TT＆C system；Sampling
Device is connected with measuring device, and measuring device is controlled by backstage TT＆C system；
Measuring device includes constant volume heating unit, regulating valve, pressure reducing valve, condensing unit, flowmeter and mating cut-off
Valve, solenoid valve, pressure sensor, temperature sensor；Constant volume heating unit, regulating valve, pressure reducing valve, condensing unit, flowmeter lead to
Piping is sequentially connected in series, and one group of solenoid valve, shut-off valve, sensor are respectively arranged in constant volume heating unit front-end and back-end；
Backstage TT＆C system control solenoid valve, regulating valve, receive the data of flowmeter, sensor, it is wet to calculate tested steam
Degree.
The sampler is mounted on tested pipeline boundary, including adjusting screw, cylinder body, piston, draw bar, flexible bending
Head, steam fairlead, sampling head；
Sampling head is connected by flexible elbow with steam fairlead, and sampling head can be swung, and steam fairlead will take
The tested steam obtained sends measuring device to；
Tested pipeline border outer, which is provided with, is connected with inside cylinder body, and the end of cylinder body is equipped with adjusting screw, adjusts
The end of screw is fixedly connected with the piston in cylinder body, and piston is connected by draw bar with sampling head；Adjusting screw is rotated, is affected
Or piston being pushed to be moved in a straight line in cylinder body, and then drive draw bar, draw bar pulls or sampling head is pushed to rotate.
Sampling head generally heavy wall tubular structure, central through hole are total head pressure tappings, are symmetrically opened on tube wall there are four axis
It is static pressure tapping to through-hole, the dynamic pressure difference formed by total head pressure tappings and static pressure tapping can calculate flow velocity, and total head takes
Pressure mouth and static pressure tapping also are able to feedback flow velocity angle information, control to adjust the angle of screw adjustment sampling head so that sampling
Head is in and meets stream mode.
The constant volume heating unit is by the way of electric heating tube in drier element or outer wall winds the mode or two of electric heating wire
The mode of person's combined heat.
The constant volume heating unit includes cartridge heater, heating element, heat insulation module, and heating element is mounted on cartridge heater
Inside, heat insulation module are mounted on outside cartridge heater；Tested steam flows at the top of cartridge heater, bottom outflow, heating element
It is placed vertically in cartridge heater, the tested steam in cartridge heater is heated；Add in the outer layer winding electricity of cartridge heater
Heated filament coats thermal insulation material outside electric heating wire.
The sensor includes pressure sensor and temperature sensor.
Caliberating device is further included, caliberating device includes steam generation facility, the carbonated drink point on steam generation facility
The sampling groove connected from device, with steam generation facility；Measuring device is accessed, the steam that steam generation facility generates passes through carbonated drink
Separator enters measuring device.
The water separator is detachable structure.
The water separator selects screen type or Spiralism type.
Beneficial effects of the present invention are：
The present invention is suitable for the moisture measurement place of structure complexity in high temperature and pressure, can realize online moisture measurement, effectively
Improve the real-time and accuracy of steam wetness measurement.Present invention design is using multifunction sampling head, it can be ensured that sampling head
Always it is in and meets stream mode, and dynamic pressure difference can be passed through and calculate flow velocity.
Description of the drawings
Fig. 1 is sampler structure diagram.
Fig. 2 is measuring device system schematic.
Fig. 3 is backstage TT＆C system schematic diagram.
Fig. 4 is caliberating device schematic diagram.
In figure, 11- adjusting screws, 12- cylinder bodies, 13- pistons, 14- tested pipelines boundary, 15- draw bars, 16- flexible bendings
Head, 17- steam fairleads, 18- sampling heads, 2- measuring devices, 21- shut-off valves, 22- solenoid valves, 23- constant volume heating units, 24-
Regulating valve, 25- pressure reducing valves, 26- condensing units, 27- flowmeters, 41- steam generation facilities, 42- water separators, 43- take
Sample slot.
Specific embodiment
The present invention is described further with reference to the accompanying drawings and examples.
The design considerations of the present invention is the basic principle of thermodynamics constant volume method, i.e., under the conditions of a constant volume, passes through steam
The end-state that is heated obtains the humidity parameter of inlet steam, and it is less that this method is related to influence factor, influences traditional heating method
And the key factor of condensation method precision --- heat exchange amount does not influence this method, can effectively improve measurement accuracy.
The present invention is a kind of online steam wetness measurement system, including sampler, caliberating device, measuring device 2 and
Its backstage TT＆C system；When measuring, sampler, measuring device 2 and its backstage TT＆C system are selected, it is wet to tested steam
Degree measures；When being demarcated, caliberating device, measuring device 2 and its backstage TT＆C system are selected, to measuring device into rower
Surely carry out corrected parameter.
As shown in Figure 1, sampler design is had external adjust and is turned to and measured flow velocity arrow using multifunction sampling head 18
The function of amount can cope with the change in flow of complex flowfield.Sampler is mounted on tested pipeline boundary 14, including adjusting screw
11st, cylinder body 12, piston 13, draw bar 15, flexible elbow 16, steam fairlead 17, sampling head 18.Sampling head 18 passes through flexible bending
First 16 are connected with steam fairlead 17, and sampling head 18 can carry out a certain range of swing, and steam fairlead 17 is by acquirement
Tested steam sends measuring device 2 to.
It is provided with outside tested pipeline boundary 14 and is connected with inside cylinder body 12, the end of cylinder body 12 is equipped with adjusting screw
11, the end of adjusting screw 11 is fixedly connected with the piston 13 in cylinder body 12, and piston 13 passes through draw bar 15 and 18 phase of sampling head
Even；Adjusting screw 11 is rotated, the convert rotational motion of screw thread is the linear motion on screw axial, affects or push piston 13 to exist
Straight-line displacement is done in cylinder body 12, the linear motion of piston 13 drives draw bar 15, and draw bar 15 pulls or push sampling head 18 to do
Rotary motion.
The generally heavy wall tubular structure of sampling head 18, is made of metal, and central through hole is total head pressure tappings, on tube wall
Symmetrical open there are four axially extending bore is static pressure tapping, and the dynamic pressure difference formed by total head pressure tappings with static pressure tapping can be used
Flow velocity is calculated, adjusting input is provided for follow-up measuring device stabilised quality flow, to realize isokinetic sampling, it is ensured that measurement result
Accuracy；The pressure tappings being arranged on sampling head 18 can also feed back flow velocity angle information, control to adjust screw 11 accordingly and adjust
The angle of whole sampling head 18, it is ensured that sampling head 18 is in and meets stream mode.
As shown in Fig. 2, measuring device 2 includes constant volume heating unit 23, regulating valve 24, pressure reducing valve 25, condensing unit 26, stream
Gauge 27 and mating shut-off valve 21, solenoid valve 22, pressure sensor, temperature sensor；Constant volume heating unit 23, regulating valve
24th, pressure reducing valve 25, condensing unit 26, flowmeter 27 are sequentially connected in series by pipeline, in 23 front-end and back-end of constant volume heating unit point
It is not provided with one group of solenoid valve 22, shut-off valve 21, sensor, sensor includes pressure sensor and temperature sensor；It is tested to steam
Vapour enters constant volume heating unit 23 by shut-off valve 21, solenoid valve 22 successively, passes through successively after the outflow of constant volume heating unit 23
Solenoid valve 22, shut-off valve 21, regulating valve 24, pressure reducing valve 25 enter condensing unit 26, pass through flowmeter after flowing out condensing unit 26
27, finally discharge or recycle through shut-off valve 21.
Constant volume heating unit 23 generates steam by heat exchange, and the mode of electric heating tube in drier element, which both may be used, to adopt
With the mode of outer wall winding electric heating wire or using other heat source ways.In the present embodiment, constant volume heating unit 23 includes
Cartridge heater, heating element, heat insulation module, heating element are mounted on inside cartridge heater, and heat insulation module is mounted on cartridge heater
It is external.Tested steam flows at the top of cartridge heater, bottom outflow, and heating element in cartridge heater is placed and avoids water droplet vertically
Accumulation, heats the tested steam in cartridge heater；Although the heating power and system radiating of constant volume heating unit 23
Amount does not influence, but in order to promote measurement efficiency measurement result, and thermal loss is reduced to carry out heat preservation using heat insulation module,
Electric heating wire is wound in the outer layer of cartridge heater, coats thermal insulation material again outside electric heating wire.
Condensing unit 26 use tube coil type heat exchanger form, for will warm up the steam of overheat condensation after discharge or
Flow back to recycling.
Flowmeter 27 is mass flowmenter.
Regulating valve 24 is used to adjust sample flow.
Pressure reducing valve 25 is installed on 26 front end of condensing unit, for limiting tested steam pressure, is ensureing condensing unit 26 just
Often work, meanwhile, preventing the unstability of condensing unit 26 influences anterior device.
Solenoid valve 22 selects high temperature and pressure isolation solenoid valve, and the shut-off valve 21 before and after solenoid valve 22 is for providing redundancy guarantor
Barrier, when solenoid valve 22 fails, still manually controllable shut-off valve 21 realizes identical function.
Pressure sensor and temperature sensor are used to monitor steam condition.Sensor is provided with two groups altogether, and one group is mounted on
23 front end of constant volume heating unit is close proximity to sampling source, and one group is mounted on 23 end of constant volume heating unit, according to the two of acquisition groups
Parameter, by the way that specific volumes is waited to calculate steam moisture.
As shown in figure 3, backstage TT＆C system can receive the data of pressure sensor, temperature sensor, flowmeter 27 etc.,
Also the valves such as solenoid valve 22, regulating valve 24 can be controlled, backstage TT＆C system controls the measuring process of package unit, according to sensing
The data of device acquisition calculate tested steam moisture.Backstage TT＆C system realize control valve opening and closing, collecting sensor information,
Calculate measurements and the control functions such as steam moisture.
Before sampling and measuring, backstage TT＆C system adjusts sample flow by regulating valve 24, makes according to 27 value of feedback of flowmeter
Uniform flow sampling requirement must be met, reach setting flow and automatic stabilisation for a period of time after, begin to warm up.When beginning to warm up, after
Platform TT＆C system simultaneously closes off the solenoid valve 22 of the inlet and outlet of constant volume heating unit 23, and TT＆C system record sensor in backstage measures
Primary data, so as to form confined space between the valves, constant volume heating unit 23 steams two 22 synchronizing closes of solenoid valve to tested
Vapour is sealed heating, tested steam condition parameter is monitored in real time by the sensor of 23 end of constant volume heating unit, until quilt
Survey be steam heated to it is hot, backstage TT＆C system record current data simultaneously stop heating, backstage TT＆C system can be according to discipline
The overheat state value of record is tested steam moisture before calculating heating.After stopping heating, backstage TT＆C system opens constant volume heating unit
The solenoid valve 22 of 23 rear ends, pressure differential cause tested steam discharge, enter condensing unit 26 by pressure reducing valve 25, then it is condensed after
Discharge or flow back to circulator.It can carry out repeatedly calculating to improve computational accuracy by multi collect multi-group data.
As shown in figure 4, caliberating device uses tracer method to be measured for standard surveying methods to steam moisture, measurement
Device 2 accesses caliberating device, and 2 measurement result of measuring device and caliberating device tracer measurement result are compared, to measuring
Device 2 is demarcated, to correct 2 parameter of measuring device.Caliberating device includes steam generation facility 41, is filled mounted on steam generation
Put the water separator 42 on 41, the sampling groove 43 connected with steam generation facility 41；After accessing measuring device 2, steam hair
The steam that generating apparatus 41 generates enters measuring device 2 by water separator 42.Steam generation facility 41 can be by electrical heating pressure
Force container realizes that after electric-heating water generates the steam under different operating modes, by water separator 42, some vapor passes through measurement
Using high potential difference natural back flow to steam generation facility 41 after condenser condensation in device 2, filled with this to stablize steam generation
Put the steam moisture in 41.Water separator 42 is detachable structure, silk screen or vane etc. can be selected, in similary work
Different humidity is generated under condition parameter to obtain multiple calibration.
The embodiment of the present invention is explained in detail above, the above embodiment is only most highly preferred embodiment of the invention,
It, within the knowledge of a person skilled in the art, can also be but the present invention is not limited to above-described embodiment
It is made a variety of changes under the premise of not departing from present inventive concept.
Claims (9)
1. a kind of online steam wetness measurement system, it is characterised in that：Including sampler, measuring device (2) and its backstage
TT＆C system；Sampler is connected with measuring device (2), and measuring device (2) is controlled by backstage TT＆C system；
Measuring device (2) includes constant volume heating unit (23), regulating valve (24), pressure reducing valve (25), condensing unit (26), flowmeter
(27) and mating shut-off valve (21), solenoid valve (22), pressure sensor, temperature sensor；Constant volume heating unit (23) is adjusted
Section valve (24), pressure reducing valve (25), condensing unit (26), flowmeter (27) are sequentially connected in series by pipeline, in constant volume heating unit
(23) front-end and back-end are respectively arranged with one group of solenoid valve (22), shut-off valve (21), sensor；
Backstage TT＆C system control solenoid valve (22), regulating valve (24) receive the data of flowmeter (27), sensor, calculate quilt
Survey steam moisture.
2. a kind of online steam wetness measurement system as described in claim 1, it is characterised in that：The sampler installation
On tested pipeline boundary (14), including adjusting screw (11), cylinder body (12), piston (13), draw bar (15), flexible elbow
(16), steam fairlead (17), sampling head (18)；
Sampling head (18) is connected by flexible elbow (16) with steam fairlead (17), and sampling head (18) can be swung, and is steamed
Vapour fairlead (17) sends the tested steam of acquirement to measuring device (2)；
It is provided with outside tested pipeline boundary (14) and is connected with inside cylinder body (12), the end of cylinder body (12) is equipped with adjusting spiral shell
It follows closely (11), the end of adjusting screw (11) is fixedly connected with the piston (13) in cylinder body (12), and piston (13) passes through draw bar
(15) it is connected with sampling head (18)；Adjusting screw (11) is rotated, affects or push piston (13) to do straight line fortune in cylinder body (12)
It is dynamic, and then draw bar (15) is driven, draw bar (15) pulls or sampling head (18) is pushed to rotate.
3. a kind of online steam wetness measurement system as claimed in claim 2, it is characterised in that：Sampling head (18) is generally
Heavy wall tubular structure, central through hole are total head pressure tappings, and it is static pressure tapping symmetrically to be opened on tube wall there are four axially extending bore, is led to
Flow velocity can be calculated by crossing the dynamic pressure difference that total head pressure tappings are formed with static pressure tapping, and total head pressure tappings and static pressure tapping also are able to
Feed back flow velocity angle information, control to adjust screw (11) adjust sampling head (18) angle so that sampling head (18) in meet stream
State.
4. a kind of online steam wetness measurement system as described in claim 1, it is characterised in that：The constant volume heating unit
(23) by the way of electric heating tube in drier element or outer wall winding electric heating wire mode or the two combined heat mode.
5. a kind of online steam wetness measurement system as described in claim 1, it is characterised in that：The constant volume heating unit
(23) including cartridge heater, heating element, heat insulation module, heating element is mounted on inside cartridge heater, and heat insulation module is mounted on
Outside cartridge heater；Tested steam flows at the top of cartridge heater, bottom outflow, and heating element is put vertically in cartridge heater
It puts, the tested steam in cartridge heater is heated；Electric heating wire is wound in the outer layer of cartridge heater, outside electric heating wire
Coat thermal insulation material.
6. a kind of online steam wetness measurement system as described in claim 1, it is characterised in that：The sensor includes pressure
Force snesor and temperature sensor.
7. a kind of online steam wetness measurement system as described in claim 1, it is characterised in that：Further include caliberating device,
Caliberating device includes steam generation facility (41), the water separator (42) on steam generation facility (41), with steaming
The sampling groove (43) of vapour generating means (41) connection；Measuring device (2) is accessed, the steam that steam generation facility (41) generates passes through
Water separator (42) is into measuring device (2).
8. a kind of online steam wetness measurement system as claimed in claim 7, it is characterised in that：The water separator
(42) it is detachable structure.
9. a kind of online steam wetness measurement system as claimed in claim 7, it is characterised in that：The water separator
(42) screen type or Spiralism type are selected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611264938.XA CN108267479A (en) | 2016-12-30 | 2016-12-30 | A kind of online steam wetness measurement system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611264938.XA CN108267479A (en) | 2016-12-30 | 2016-12-30 | A kind of online steam wetness measurement system |
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| Publication Number | Publication Date |
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| CN108267479A true CN108267479A (en) | 2018-07-10 |
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ID=62770142
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| CN201611264938.XA Pending CN108267479A (en) | 2016-12-30 | 2016-12-30 | A kind of online steam wetness measurement system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111007112A (en) * | 2019-10-24 | 2020-04-14 | 上海交通大学 | System and method for online measurement of steam humidity based on conductivity method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205317539U (en) * | 2015-12-10 | 2016-06-15 | 核动力运行研究所 | Mobile steam sample structure of direction adjustable |
| CN205449849U (en) * | 2015-12-31 | 2016-08-10 | 核动力运行研究所 | Online moisture in steam measures and calibration system |
| CN206420806U (en) * | 2016-12-30 | 2017-08-18 | 核动力运行研究所 | A kind of online steam wetness measurement system |
-
2016
- 2016-12-30 CN CN201611264938.XA patent/CN108267479A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205317539U (en) * | 2015-12-10 | 2016-06-15 | 核动力运行研究所 | Mobile steam sample structure of direction adjustable |
| CN205449849U (en) * | 2015-12-31 | 2016-08-10 | 核动力运行研究所 | Online moisture in steam measures and calibration system |
| CN206420806U (en) * | 2016-12-30 | 2017-08-18 | 核动力运行研究所 | A kind of online steam wetness measurement system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111007112A (en) * | 2019-10-24 | 2020-04-14 | 上海交通大学 | System and method for online measurement of steam humidity based on conductivity method |
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Application publication date: 20180710 |