CN106644817A - Nitrogen saturated steam pressure measuring device based on engineering thermodynamics - Google Patents
Nitrogen saturated steam pressure measuring device based on engineering thermodynamics Download PDFInfo
- Publication number
- CN106644817A CN106644817A CN201611189832.8A CN201611189832A CN106644817A CN 106644817 A CN106644817 A CN 106644817A CN 201611189832 A CN201611189832 A CN 201611189832A CN 106644817 A CN106644817 A CN 106644817A
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- China
- Prior art keywords
- nitrogen
- constant
- outlet
- heat
- drying system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 59
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 27
- 229920006395 saturated elastomer Polymers 0.000 title claims abstract description 22
- 239000007789 gas Substances 0.000 claims abstract description 24
- 238000001035 drying Methods 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 2
- 239000000779 smoke Substances 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims 1
- 229910001873 dinitrogen Inorganic materials 0.000 abstract 5
- 239000002274 desiccant Substances 0.000 abstract 1
- 229920001971 elastomer Polymers 0.000 abstract 1
- 239000003595 mist Substances 0.000 abstract 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000008246 gaseous mixture Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N7/00—Analysing materials by measuring the pressure or volume of a gas or vapour
Landscapes
- 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)
- Drying Of Solid Materials (AREA)
Abstract
The invention discloses a nitrogen saturated steam pressure measuring device based on engineering thermodynamics. The device comprises a gas supply system, a constant-temperature humidifying system and a drying system which are connected through valves and heat-preserving pipelines. The outlet pressure of a nitrogen gas cylinder is controlled by a pressure reduction valve to be constant, and outlet flow of the nitrogen gas cylinder is controlled by a mass flow controller to be constant. Nitrogen gas first enters a buffer tank to be mixed evenly and then enters the humidifying tank to be humidified, and water mist is removed by a demister at an outlet of the humidifying tank. The humidifying tank is heated with heat conductive oil, a PID regulator adjusts the openness of a heat conductive oil pump, and the temperature of mixed gas composed of the nitrogen gas and saturated steam at an outlet of the demister is controlled to be constant. By means of a Vaisala hygrometer, it is confirmed that the relative humidity of the mixed gas entering the drying system reaches 1 and the relative humidity of the nitrogen gas flowing out of the drying system is 0. The humidifying tank, a rubber ball drying agent and all connection pipelines are all provided with a heat-preserving layer. Measuring results prove that the device is easy to operate, the measuring results are accurate, and a certain thought is provided for measuring saturated steam pressure of other gases.
Description
Technical field
The present invention relates to pure gas saturated vapor pressure determines field, and in particular to a kind of measure dress of nitrogen saturated vapor pressure
Put.
Background technology
Within specified temperatures, portable water vapour amount is certain to gas, when the water vapour amount carried in gas reaches
During to the limit at this temperature, claim the water vapour in gas to reach saturation state, now in mixed gas water vapour partial pressure
Power is referred to as the saturated vapor pressure of the gas.The saturated vapor pressure of gas is the Important Property Parameters of gas, by determining gas
Saturated vapor pressure, it is possible to directly calculate the relative humidity in gas, such as the humidity in air.Relative humidity is to determine currently
The important parameter of ambient condition, in engineering, generally requires to know the safe phase that an equipment runs under specific gas environment
To humidity, if more than safe relative humidity will damage equipment, or even there is accident；In meteorological field, especially short-term
In forecast, relative humidity is the significant in value of a judgement precipitation probability.But at present the device of measure saturated vapor pressure is main
Neat liquid is both for, not a kind of good device can determine the saturated vapor pressure of pure gas.
The content of the invention
It is an object of the invention to provide a kind of nitrogen saturated vapor pressure based on Engineering Thermodynamics determines device, its feature exists
In：Nitrogen cylinder outlet pressure is controlled constant by pressure-reducing valve, and rate of discharge is controlled constant by mass flow controller；Nitrogen is introduced into
It is well mixed in surge tank, humidifies subsequently into humidifying pot, water smoke is removed by demister in humidifying pot outlet；By conduction oil
Warming and humidifying tank, PID regulator adjusts the aperture of Heat-transfer Oil Pump, controls nitrogen, the saturated vapor gaseous mixture of demister outlet
The temperature constant of body；Draw hygrometer to determine that the relative humidity into the mixed gas of drying system reaches 1 by Visa, flow out dry
The relative humidity of the nitrogen of drying system is 0；Humidifying pot, glueballs drier and all connecting pipes are all provided with heat-insulation layer.
Compared with prior art, the beneficial effects of the present invention is：A kind of nitrogen based on Engineering Thermodynamics of the present invention
Saturated vapor pressure determines device, can be rational in infrastructure with the nitrogen saturated vapor pressure under Accurate Determining different temperatures, simple to operate,
Measurement is accurate, and the saturated vapor pressure to determine other gases provides a kind of new approaches.
Description of the drawings
Fig. 1 is the structural representation that nitrogen saturated vapor pressure determines device.
Specific embodiment
The invention provides a kind of nitrogen saturated vapor pressure based on Engineering Thermodynamics determines device, below in conjunction with the accompanying drawings and
The present invention is described further for specific embodiment.
Fig. 1 show the structural representation that nitrogen saturated vapor pressure determines device.The device includes gas supply system, perseverance
Warm humidification system and drying system, the gas supply system, constant temperature humidification system and drying system are by valve and insulating tube
Road is coupled together.Gas supply system includes：Nitrogen cylinder 1, pressure-reducing valve 2 and pressure gauge 3；Constant temperature humidification system includes：Surge tank
4th, mass flow controller 5, humidifying pot 6, demister 7, heat-conducting oil heating case 11, condenser 12, PID regulator 13, electrical heating
Device 14 and Heat-transfer Oil Pump 15；Drying system includes：Thermometer 8, Visa draws hygrometer 9 and glueballs drier 10.
Specific implementation step：First, close valve A and open valve B, weigh three glueballs respectively with electronic balance and be dried
The initial mass of agent 10.Then, the valve of nitrogen cylinder 1 is opened, controlling nitrogen pressure through pressure-reducing valve 2 after nitrogen release is
1atm, after nitrogen is well mixed in surge tank 4, nitrogen flow is controlled for 6L/min by mass flow controller 5.Open heat conduction
The switch of oily electric heater 14, starts Heat-transfer Oil Pump 15,90 DEG C of sets target temperature in PID regulator 13.When thermometer 8
The number of degrees are stable between 89.5 DEG C -90.5 DEG C, when Visa draws the number of degrees of hygrometer 9 stable between 0.95-1, open valve
Door A simultaneously closes valve B, starts timing 5min.At the end of timing, valve B is opened immediately and valve A is closed, with electronic balance point
Another name takes the final mass of three glueballs drier 10.Can be in the hope of the saturation of nitrogen at 90 DEG C according to Engineering Thermodynamics formula
Vapour pressure.
By the target temperature for changing the setting of PID regulator 13, you can realize that the nitrogen saturation determined under different temperatures is steamed
Vapour pressure.
Claims (1)
1. a kind of nitrogen saturated vapor pressure based on Engineering Thermodynamics determines device, and the device is added by gas supply system, constant temperature
Wet system, drying system, and by valve, utilidor connection composition；It is characterized in that：Nitrogen cylinder outlet pressure is by pressure-reducing valve
Control is constant, and rate of discharge is controlled constant by mass flow controller；Nitrogen is introduced into surge tank and is well mixed, subsequently into
Humidify in humidifying pot, water smoke is removed by demister in humidifying pot outlet；By heat-conducting oil heating humidifying pot, PID regulator is adjusted
The aperture of Heat-transfer Oil Pump, controls nitrogen, the temperature constant of saturated vapor mixed gas of demister outlet；Draw wet by Visa
Degree meter determines that the relative humidity into the mixed gas of drying system reaches 1, and the relative humidity for flowing out the nitrogen of drying system is
0；Humidifying pot, glueballs drier and all connecting pipes are all provided with heat-insulation layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611189832.8A CN106644817A (en) | 2016-12-21 | 2016-12-21 | Nitrogen saturated steam pressure measuring device based on engineering thermodynamics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611189832.8A CN106644817A (en) | 2016-12-21 | 2016-12-21 | Nitrogen saturated steam pressure measuring device based on engineering thermodynamics |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106644817A true CN106644817A (en) | 2017-05-10 |
Family
ID=58834416
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611189832.8A Pending CN106644817A (en) | 2016-12-21 | 2016-12-21 | Nitrogen saturated steam pressure measuring device based on engineering thermodynamics |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106644817A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201607418U (en) * | 2009-12-11 | 2010-10-13 | 中国计量科学研究院 | Low frost-point humidity standard generation device |
| CN201622257U (en) * | 2010-04-08 | 2010-11-03 | 上海理工大学 | Easy testing device of relationship of saturation pressure and saturation temperature |
| CN202092924U (en) * | 2011-01-12 | 2011-12-28 | 北京硕人海泰能源科技有限公司 | Measuring device of water content of gas |
| CN102607993A (en) * | 2012-04-09 | 2012-07-25 | 上海化工研究院 | Modularized vacuum system of saturated vapor pressure and solid density of tested substance and applications |
| CN103537208A (en) * | 2013-10-31 | 2014-01-29 | 张守明 | Water saturated steam method relative humidity generation device and humidity algorithm thereof |
| CN104155415A (en) * | 2014-08-20 | 2014-11-19 | 国家电网公司 | Method for rapidly obtaining constant gas humidity |
| CN205301119U (en) * | 2015-12-29 | 2016-06-08 | 天津市长芦化工新材料有限公司 | Survey device of liquid saturated vapor pressure and temperature relation |
| CN206410958U (en) * | 2016-12-21 | 2017-08-15 | 华北电力大学 | A kind of nitrogen saturated vapor pressure based on Engineering Thermodynamics determines device |
-
2016
- 2016-12-21 CN CN201611189832.8A patent/CN106644817A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201607418U (en) * | 2009-12-11 | 2010-10-13 | 中国计量科学研究院 | Low frost-point humidity standard generation device |
| CN201622257U (en) * | 2010-04-08 | 2010-11-03 | 上海理工大学 | Easy testing device of relationship of saturation pressure and saturation temperature |
| CN202092924U (en) * | 2011-01-12 | 2011-12-28 | 北京硕人海泰能源科技有限公司 | Measuring device of water content of gas |
| CN102607993A (en) * | 2012-04-09 | 2012-07-25 | 上海化工研究院 | Modularized vacuum system of saturated vapor pressure and solid density of tested substance and applications |
| CN103537208A (en) * | 2013-10-31 | 2014-01-29 | 张守明 | Water saturated steam method relative humidity generation device and humidity algorithm thereof |
| CN104155415A (en) * | 2014-08-20 | 2014-11-19 | 国家电网公司 | Method for rapidly obtaining constant gas humidity |
| CN205301119U (en) * | 2015-12-29 | 2016-06-08 | 天津市长芦化工新材料有限公司 | Survey device of liquid saturated vapor pressure and temperature relation |
| CN206410958U (en) * | 2016-12-21 | 2017-08-15 | 华北电力大学 | A kind of nitrogen saturated vapor pressure based on Engineering Thermodynamics determines device |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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Application publication date: 20170510 |