CN1057903A - On-line gasoline vapor pressure analyzer - Google Patents
On-line gasoline vapor pressure analyzer Download PDFInfo
- Publication number
- CN1057903A CN1057903A CN 91106702 CN91106702A CN1057903A CN 1057903 A CN1057903 A CN 1057903A CN 91106702 CN91106702 CN 91106702 CN 91106702 A CN91106702 A CN 91106702A CN 1057903 A CN1057903 A CN 1057903A
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- CN
- China
- Prior art keywords
- solenoid valve
- vapor pressure
- sensing chamber
- sample
- microsystem
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 5
- 238000005070 sampling Methods 0.000 claims description 16
- 238000004458 analytical method Methods 0.000 claims description 7
- 238000000605 extraction Methods 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 238000012937 correction Methods 0.000 claims description 2
- 230000007704 transition Effects 0.000 claims description 2
- 229920006395 saturated elastomer Polymers 0.000 abstract description 5
- 238000001514 detection method Methods 0.000 abstract description 4
- 239000007788 liquid Substances 0.000 abstract description 4
- 238000002156 mixing Methods 0.000 abstract description 2
- 238000002347 injection Methods 0.000 abstract 1
- 239000007924 injection Substances 0.000 abstract 1
- 238000007670 refining Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 230000003749 cleanliness Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000009347 mechanical transmission Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 238000004092 self-diagnosis Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
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- Sampling And Sample Adjustment (AREA)
Abstract
The invention relates to an online gasoline vapor pressure analyzer. It is used in the situations of refining gasoline or light oil components and continuously detecting and controlling the saturated vapor pressure of a gasoline pipeline blending system, and can also detect the saturated vapor pressure of oil products in a light oil storage tank. The method is characterized in that the method is suspended in a detection chamber in an oil bath groove under constant temperature, an ejector utilizing water as kinetic energy is vacuumized, then a sample is injected into the detection chamber through a throttling nozzle, and when the gas-liquid ratio in the detection chamber reaches a set value, the sample injection is stopped. The absolute vapor pressure in the chamber is then measured. Then, the vapor pressure is corrected by a microcomputer system according to a specific coefficient to obtain the Reid vapor pressure value.
Description
The present invention system relates to a kind of online analyzer for vapour pressure of gasoline.It is to be used to refine the continuous detecting of gasoline or lightweight oil component and gasoline pipeline blending system and the occasion of its saturated vapor pressure of control; Also can detect the saturated vapor pressure of the oil product in the lightweight oil storage tank.
General online analyzer for vapour pressure of gasoline has the absolute analyzer for vapour pressure of PSD Randt monitor and PSG all kinds of at present both at home and abroad.The former is based upon on the basis of complicated mechanical system and volume pump, simulates partially that the manual analysis method detects.It saturated indoor, in order to keep the gas liquid ratio condition that enters with drain sample is 4: 1 strict proportionate relationship, need an accurate proportioning pump and corresponding machine driven system to realize, and controlled in this indoor float-ball type regulating system of still needing the accurate control of cover liquid level, the pressure that records indoor bottom by pressure unit is finished then.The latter be the temperature of tested sample keep constant down, sample is just realized at its its sample strain of nozzle exit continuous coverage when accurately controlling the nozzle type spraying system that its pressure falls by two ends at a high speed.But these analysers also exist following deficiency: the one, and the former is owing to be provided with the complicated mechanical transmission and accurate float-ball type regulating system, thus cost height not only, and difficult in maintenance.Simultaneously in long-term operational process, cannot say for sure to demonstrate,prove its not Vent leak and do not influence measurement data, when especially the sample cleanliness factor being had any carelessness, what all can cause measuring is inaccurate.The 2nd, the latter is because the pressure governor of this analyser requires control accurately, and to different samples, corresponding adjustment need be done in its position of regulating pressure and sample flow rate and nozzle, thereby demarcates uneconomically, and is subject to the variable effect of sample character.
The object of the present invention is to provide a kind of simple in structure, need not sampling pump or any mechanical sampling device, be not subjected to the variable effect of sample inlet pressure and require low sample itself and its disposal system, adjustment is simple, measurement data is accurate, and can reach reliable and stable online analyzer for vapour pressure of gasoline in long-time running.
The present invention finishes by following method, its principle is to be the thrower of kinetic energy with the light water, to vacuumize in the airtight sensing chamber, then by differential pressure transmitter after microsystem is handled, when making the air-flow that sample produced that enters sensing chamber through throttle nozzle, realize detecting by absolute pressure transducer than the condition that reaches four to one.Its concrete structure is described below: it has an airtight sensing chamber, is outstanding being loaded in the oil bath that is held under the constant temperature.Sensing chamber is one and is the spherical or square shape of tubular or its underpart and is conical, the tubular closed container in top.On the end face of sensing chamber or a certain side, be equipped with one with its indoor communicate draw adapter, this adapter all is connected with differential pressure transmitter that links to each other with microsystem and absolute pressure transducer with air inlet pipeline by the air inlet solenoid control.Above-mentioned three also can distinguish each and be communicated with sensing chamber, thereby may not need that this is set and draw adapter.One side of sensing chamber or any side are equipped with a through hole type throttle nozzle, and this throttle nozzle diminishes at the internal diameter that leads to its indoor ejiction opening place, and the transition face at the place that diminishes is circular arc type or pyramid type or hole Sheet type or nozzle type or Wen Qiuli formula type.The outer end of throttle nozzle then is connected with the sample introduction pipeline of being controlled by solenoid valve for sampling.On the sample introduction pipeline between this solenoid valve for sampling and the throttle nozzle, also be connected it with differential pressure transmitter.On before feeding solenoid valve for sampling in addition and one section sample introduction pipeline that place oil bath, installed the sample preheat coil additional.Any position of on the cone bottom surface of sensing chamber bottom or sensing chamber bottom also is equipped with one from its indoor adapter of drawing, it respectively with by the stock layout pipeline connection of the gas exhaust piping of exhaust solenoid valve control and stock layout solenoid control it.The other end pipeline of exhaust solenoid valve is that the thrower or the gas swab of kinetic energy is connected with one with common domestic water or process water again.Aforementioned each solenoid valve links to each other with microsystem respectively.Like this, according to the above structure, when open air inlet solenoid valve and stock layout solenoid valve by microcomputer after, gas with certain pressure enters sensing chamber by air inlet pipeline, therefore the tested sample of previous cycle in the sensing chamber is discharged it by the stock layout pipeline under the effect of gaseous tension, and to arranged carry out the purging of certain hour in the sensing chamber behind the sample after, be about to air inlet and stock layout closed electromagnetic valve, thereby cut off this two pipelines.And then by microsystem exhaust solenoid valve is opened, sensing chamber and thrower pipeline are got through.Because thrower constantly produces negative pressure under the effect of current, thereby just can constantly be drawn out of gas in the sensing chamber and become vacuum.When this is indoor reach the certain vacuum degree after, exhaust solenoid valve is closed, and solenoid valve for sampling is opened by microsystem, thus sample to be tested is injected in the sensing chamber by throttle nozzle by the sample introduction pipeline under the suction function of sensing chamber.So the two ends at throttle nozzle have just produced differential pressure, because differential pressure transmitter links to each other with this place, two ends, therefore make differential pressure signal constantly be sent to microsystem by this differential pressure transmitter, then after microsystem changes digital quantity into to this differential pressure signal, carry out the comparison operation of sqrt, extraction of square root root accumulation and accumulated value and setting value, its operation result whether see with sensing chamber in gas-liquid volume ratio be that 4: 1 setting value conforms to, in case after accumulated value has reached setting value, be about to solenoid valve for sampling and close.At this moment, the absolute pressure transducer that links to each other with sensing chamber is the absolute steam pressure value of sample at this indoor measured pressure.Said process is opened air inlet and stock layout solenoid valve once more by microcomputer after finishing, thereby realizes next process circulation.Repeat the above-mentioned course of work in this way again and again, just can make this analysis instrument periodically record the absolute steam pressure value of sample.If will realize the detection of Reid vapour pressure value, can be with this absolute pressure value through corresponding microsystem, homing method according to prior employing, from the Reid vapour pressure value of one group of one group of sample that obtains by ASTM-D-323 manual analysis method and the absolute steam pressure value of the same group of sample that this analysis instrument records, the correction factor that calculates is between the two revised in real time, just can realize the measurement of Reid vapour pressure.In order to make the temperature in the oil bath keep constant and even, micro-processor controlled temperature sensor and well heater are housed in this groove; Cooling coil and oil bath stirrer also are housed in addition.
Advantage of the present invention is, and is simple in structure, need not mechanical moving element, thereby cost is low.And possesses the dual-use function of measuring Reid vapour pressure and absolute vapour pressure.Adjustment is easy, and accuracy, repeatability and good stability are not subjected to the influence of fluctuations of sample inlet pressure simultaneously.Possess the fault self-diagnosis processing capacity in addition, also can carry out data communication by microsystem and computing machine.
The invention will be further described below in conjunction with accompanying drawing.
Accompanying drawing 1 is of the present inventionly vertically to analyse and observe and connection layout.
Wherein:
1-air inlet solenoid valve 2-stock layout solenoid valve
3-exhaust solenoid valve 4-thrower
5-oil bath stirrer 6-oil bath
7-solenoid valve for sampling 8-sample introduction preheat coil
9-oil bath cooling coil 10-oil bath heater
11-sqrt operation program
The comparison operation program of 12-accumulated value and setting value
13-extraction of square root root accumulation operation program
14-closes the signal procedure of solenoid valve for sampling
15-absolute pressure written-out program
16-oil bath temperature control unit
The 17-microsystem
18-absolute pressure value conversion Reid vapour pressure program
The 19-absolute pressure transducer
20-differential pressure transmitter 21-throttle nozzle
22-temperature sensor 23-sensing chamber
With reference to accompanying drawing: in oil bath (6), the outstanding sensing chamber (23) of being equipped with.The end face of sensing chamber (23) is drawn adapter, and it is connected with air inlet pipeline, differential pressure transmitter (20) and the absolute pressure transducer (19) controlled by air inlet solenoid valve (1) respectively.The output of differential pressure transmitter (20) needs the comparison operation program (12) of the sqrt operation program (11) through microsystem (17), the root that extracts square root accumulation operation program (13), accumulated value and setting value and sends the signal procedure (14) of closing solenoid valve for sampling (7) and carry out calculation process.Wherein comparison operation program (12) backspace is again accumulated operation program (13) in the evolution root.Differential pressure transmitter (20) also with by solenoid valve for sampling (7) and the sample introduction pipeline that is contained between the throttle nozzle (21) in the sensing chamber (23) is connected.The output of absolute pressure transducer (19) is converted into Reid vapour pressure program (18) through the absolute pressure written-out program (15) of microsystem (17) and absolute pressure respectively and handles.The bottom of sensing chamber (23) is connected by taking over respectively with by the stock layout pipeline of stock layout solenoid valve (2) control and the gas exhaust piping of exhaust solenoid valve (3) control.Gas exhaust piping is connected on the thrower (4) before at the pneumoelectric magnet valve (3) that do not run in.Preheat coil (8), cooling water coil (9), temperature sensor (22) and oil bath heater (10) on stirrer (5), the sample introduction pipeline also are housed in the oil bath (6).Wherein (22) are with (10) and link to each other with the temperature control unit (16) of microsystem (17) respectively.It is interior or outer that above-mentioned solenoid valve for sampling (7), absolute pressure transmitter (19) and differential pressure transmitter (20) can be loaded on oil bath (6).
Claims (2)
1, the present invention relates to a kind of online analyzer for vapour pressure of gasoline, it is characterized in that:
In the outstanding oil bath [6] that is loaded under the constant temperature of a, a sensing chamber [23], it is one, and can be the spherical or square shape of tubular or its underpart be that coniform, top is the closed container of tubular,
One side of b, sensing chamber [23] or any side are equipped with a through hole type throttle nozzle [21], this throttle nozzle [21] diminishes at the internal diameter that leads to its indoor spout place, this transition face that diminishes the place is circular arc type or pyramid type or hole Sheet type or nozzle type or Wen Qiuli formula type, the outer end of throttle nozzle [21] is connected with the sample introduction pipeline of being controlled by solenoid valve for sampling [7], be connected it with differential pressure transmitter [20] on the sample introduction pipeline between solenoid valve for sampling [7] and the throttle nozzle [21]
On the cone bottom surface of c, sensing chamber [23] bottom or any position of sensing chamber bottom has the adapter of drawing to be connected with the gas exhaust piping of being controlled by exhaust solenoid valve [3] with the stock layout pipeline of being controlled by stock layout solenoid valve [2] respectively, the other end pipeline of exhaust solenoid valve [3] then is connected with the thrower or the gas swab [4] that with water are kinetic energy
D, there is the adapter of drawing to be connected with differential pressure transmitter [20] that links to each other with microsystem [17] and absolute pressure transducer [19] with the air inlet pipeline of air inlet solenoid valve [1] control respectively on the end face of sensing chamber [23] or a certain side, differential pressure transmitter [20] output needs through sqrt operation program [11] and root accumulated value operation program [13] and the accumulated value and the setting value comparison operation program [12] of microsystem [17] and sends the signal procedure [14] of closing solenoid valve for sampling [7] and carry out calculation process, wherein comparison operation program [12] backspace is again accumulated operation program [13] in the extraction of square root root, the output of absolute pressure transducer [19], need to handle above-mentioned solenoid valve for sampling [7] through the absolute pressure written-out program [15] of microsystem [17], it is interior or outer that absolute pressure transmitter [19] and differential pressure transmitter [20] can be loaded on oil bath [6].
2, online analyzer for vapour pressure of gasoline according to claim 1, the output of its absolute pressure transducer (19) also need be converted into Reid vapour pressure program (18) through the absolute pressure value of microsystem (17) and handle, these (18) are the homing method by prior employing, from the Reid vapour pressure value of one group of one group of sample that obtains by ASTM-D-323 manual analysis method and the absolute steam pressure value of the same group of sample that this analysis instrument records, the correction factor between the two that calculates is revised the back conversion in real time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91106702 CN1022864C (en) | 1991-05-20 | 1991-05-20 | On-line gasoline vapor pressure analyzer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91106702 CN1022864C (en) | 1991-05-20 | 1991-05-20 | On-line gasoline vapor pressure analyzer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1057903A true CN1057903A (en) | 1992-01-15 |
| CN1022864C CN1022864C (en) | 1993-11-24 |
Family
ID=4908086
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91106702 Expired - Fee Related CN1022864C (en) | 1991-05-20 | 1991-05-20 | On-line gasoline vapor pressure analyzer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1022864C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110756121A (en) * | 2019-10-24 | 2020-02-07 | 上海理工大学 | Device and method for promoting generation of carbon dioxide hydrate |
-
1991
- 1991-05-20 CN CN 91106702 patent/CN1022864C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110756121A (en) * | 2019-10-24 | 2020-02-07 | 上海理工大学 | Device and method for promoting generation of carbon dioxide hydrate |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1022864C (en) | 1993-11-24 |
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