CN101504136B - Steam-filling quality monitoring instrument for steam-filling boiler - Google Patents
Steam-filling quality monitoring instrument for steam-filling boiler Download PDFInfo
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- CN101504136B CN101504136B CN2009100196745A CN200910019674A CN101504136B CN 101504136 B CN101504136 B CN 101504136B CN 2009100196745 A CN2009100196745 A CN 2009100196745A CN 200910019674 A CN200910019674 A CN 200910019674A CN 101504136 B CN101504136 B CN 101504136B
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Abstract
The invention relates to an oilfield on-line automatic monitoring system, in particular to a steam injection quality monitor of a steam injection boiler. The monitor adopts the following technical proposal that: the monitor mainly comprises a dryness monitoring unit, a flow monitoring unit, a pressure monitoring unit and a data processing and displaying unit; the steam-injection boiler is provided with a dryness monitor, a flow monitor and a pressure monitor respectively; and the dryness monitor, the flow monitor and the pressure monitor are connected with the data processing and displaying unit respectively to display related parameters, such as the dryness for operating the boiler, stream injection flow, pressure, water supplying electric conductivity, boiler water electric conductivity, standard steam volume of the boiler and the like. The monitor has the advantages of ing on-line monitoring records of steam injection velocity, steam injection pressure, and the steam injection dryness, accumulatively recording the steam injection volume at the same time, being convenient for the relative analysis during exploitation of thick oil, providing real data for the design of the thick oil process, replacing the prior method for accumulating the flow by the manual interval record, and improving the work efficiency.
Description
One, technical field:
The present invention relates to a kind of oil field on-line monitoring system, particularly a kind of steam-filling quality monitoring instrument for steam-filling boiler.
Two, background technology:
In the oil-field thick-oil recovery process, annotating the vapour quality is the key of decision thickened oil recovery effect.Annotating the vapour quality mainly comprises steam injection rate, adds up to annotate vapour amount, steam injection pressure, notes vapour mass dryness fraction, steam injection pressure in service is by annotating the decision of vapour well, steam injection rate is annotated the vapour mass dryness fraction by the situation decision of injection boiler own by steam injection pressure and the decision of injection boiler metered flow.In parameter monitoring, steam injection rate is obtained by the orifice flowmeter signal, and steam injection pressure is obtained by the artificial reading of pressure meter, annotates the vapour mass dryness fraction by manual application extensive use of chemical fedtilizers and other farm chemical test.Numerically there is not continuity.Simultaneously because the difference of pressure, mass dryness fraction, annotating parameter that the vapour well annotates injection boiler in the vapour for every mouthful also can't comparative analysis, has influence on the effect analysis of heavy oil production.
Three, summary of the invention:
Purpose of the present invention is exactly the above-mentioned defective that exists at prior art, a kind of steam-filling quality monitoring instrument for steam-filling boiler is provided, focus vapour speed, steam injection pressure, notes vapour mass dryness fraction on-line monitoring record, be convenient to the comparative analysis in the thickened oil recovery, for the design of viscous crude technology provides real data.
Its technical scheme is: mainly be made up of mass dryness fraction monitoring, flow monitoring, pressure monitoring and data processes and displays unit, mass dryness fraction monitoring, flow monitoring and pressure monitoring instrument are installed respectively on injection boiler, described mass dryness fraction monitoring, flow monitoring and pressure monitoring instrument are connected data processes and displays unit respectively, show the mass dryness fraction of boiler operatiopn, notes steam flow amount, pressure, feedwater conductivity, stove water conductivity and the standard vapour amount relevant parameter of boiler.
Above-mentioned mass dryness fraction monitoring instrument is in outlet of steam boiler the high pressure orifice plate to be installed, and the upper end outlet of high pressure orifice plate is communicated with high-pressure conduit, and high-pressure conduit is communicated with differential pressure pick-up, and the PLC circuit carries out data and handles to calculate and annotate the vapour mass dryness fraction obtaining before and after the orifice plate pressure reduction.
Above-mentioned mass dryness fraction monitoring instrument is in outlet of steam boiler steam-water separator to be installed, steam-water separator is communicated with condensing heat exchanger by reducing valve, one end of electrical conductivity sampler connects condensing heat exchanger, the other end connects the inlet of injection boiler, draws the dryness of wet steam of boiler reality by the electrical conductivity of monitoring condensation electrical conductivity of water and feedwater.
Above-mentioned flow monitoring instrument is to connect boiler plunger displacement pump, differential pressure transmitter and pneumatic flowmeter outside injection boiler, connects pneumatic-to-current converter between differential pressure transmitter and pneumatic flowmeter, and the gas signal is converted into the feedwater flow value that the signal of telecommunication draws boiler.
At the flow meter of giving the transmission of the water end (W.E.) mounting strap signal of telecommunication of injection boiler, flow meter connects boiler plunger displacement pump and differential pressure transmitter successively, the monitoring feedwater flow.
Above-mentioned flow monitoring instrument is to connect boiler plunger displacement pump and differential pressure transmitter outside injection boiler, connects frequency converter on plunger displacement pump, can enroll frequency conversion electricity hertz signal monitoring feedwater flow.
Above-mentioned pressure monitoring instrument is a setting pressure sensor admission steam injection pressure signal on the outlet line of injection boiler, and the outlet pressure of injection boiler is monitored.
The invention has the beneficial effects as follows: focus vapour speed, steam injection pressure, notes vapour mass dryness fraction on-line monitoring record, annotate the record of vapour amount accumulative total simultaneously, be convenient to the comparative analysis in the thickened oil recovery, for the design of viscous crude technology provides real data, replace the former method that only writes down integrated flow, improved operating efficiency with artificial interval.
Four, description of drawings:
Accompanying drawing 1 is the structural representation of a kind of embodiment of the present invention;
Accompanying drawing 2 is schematic diagrames of a kind of embodiment of mass dryness fraction monitoring;
Accompanying drawing 3 is schematic diagrames of the another kind of embodiment of mass dryness fraction monitoring;
Accompanying drawing 4 is schematic diagrames of a kind of embodiment of flow monitoring;
Accompanying drawing 5 is schematic diagrames of second kind of embodiment of flow monitoring;
Accompanying drawing 6 is schematic diagrames of the third embodiment of flow monitoring;
Accompanying drawing 7 is schematic diagrames of a kind of embodiment of pressure monitoring;
Accompanying drawing 8 is circuit theory diagrams of the present invention;
Among the last figure: high pressure orifice plate 1, high-pressure conduit 2, differential pressure pick-up 3, injection boiler 4, steam-water separator 5, reducing valve 6, condensing heat exchanger 7, electrical conductivity sampler 8, boiler plunger displacement pump 9, differential pressure transmitter 10 and pneumatic flowmeter 11, pneumatic-to-current converter 12, flow meter 13, frequency converter 14, pressure sensor 15, data processing display 16.
Five, the specific embodiment:
The present invention mainly is made up of mass dryness fraction monitoring, flow monitoring, pressure monitoring and data processing display 16, mass dryness fraction monitoring, flow monitoring and pressure monitoring instrument are installed respectively on injection boiler, described mass dryness fraction monitoring, flow monitoring and pressure monitoring instrument are connected data processes and displays unit respectively, relevant parameters such as the mass dryness fraction of demonstration boiler operatiopn, the notes steam flow amount of boiler, pressure, feedwater conductivity, stove water conductivity, standard vapour amount.
With reference to accompanying drawing 2: the mass dryness fraction monitoring instrument can adopt in the outlet of injection boiler 4 high pressure orifice plate 1 is installed, the upper end outlet of high pressure orifice plate is communicated with high-pressure conduit 2, high-pressure conduit is communicated with differential pressure pick-up 3, and the PLC circuit carries out data and handles to calculate and annotate the vapour mass dryness fraction obtaining before and after the orifice plate pressure reduction.
With reference to accompanying drawing 3: the mass dryness fraction monitoring instrument also can adopt in injection boiler 4 outlets steam-water separators 5 are installed, steam-water separator is communicated with condensing heat exchanger 7 by reducing valve 6, one end of electrical conductivity sampler 8 connects condensing heat exchanger, the other end connects the inlet of injection boiler, draws the dryness of wet steam of boiler reality by the electrical conductivity of monitoring condensation electrical conductivity of water and feedwater.
The moist steam of certain mass dryness fraction of boiler export, behind the outlet steam-water separator, saturation water flows out by reducing valve decompression (not vaporizing) cooling back, by the electrical conductivity of monitoring condensation electrical conductivity of water and feedwater, just can calculate the wet whole vapour mass dryness fraction of boiler reality.Wherein, controller adopts OMRONCJ1G not have floor type modularization PLC as controller, CPU, power supply, analog module only are installed as required just can be realized data acquisition, in PLC inside, the electrical conductivity of gathering is carried out the engineering quantity conversion, calculate by the algorithm of mass dryness fraction, just can calculate the steam quality of boiler, built-in thermodynamic data table is gathered the feedwater flow of boiler simultaneously, calculates boiler operatiopn calorific value flow by algorithm.
In addition, the mode that the flow monitoring instrument can also adopt is with reference to accompanying drawing 4: connect boiler plunger displacement pump 9, differential pressure transmitter 10 and pneumatic flowmeter 11 outside injection boiler, between differential pressure transmitter 10 and pneumatic flowmeter 11, connect pneumatic-to-current converter 12, the gas signal is converted into the feedwater flow value that the signal of telecommunication draws boiler.
With reference to accompanying drawing 5: the flow monitoring instrument is the flow meter 13 of giving the transmission of the water end (W.E.) mounting strap signal of telecommunication at injection boiler, and flow meter 13 connects boiler plunger displacement pump 9 and differential pressure transmitter 10 successively, the monitoring feedwater flow.
With reference to accompanying drawing 6: the flow monitoring instrument is to connect boiler plunger displacement pump 9 and differential pressure transmitter 10 outside injection boiler, connects frequency converter 14 on plunger displacement pump, can enroll frequency conversion electricity hertz signal monitoring feedwater flow.
Discharge=operation hertz * plunger displacement pump metered flow ÷ 50
With reference to accompanying drawing 7: above-mentioned pressure monitoring instrument is setting pressure sensor 15 admission steam injection pressure signals on the outlet line of injection boiler, and the outlet pressure of injection boiler is monitored.
The conversion of standard vapour: being converted to 17.2MPa, mass dryness fraction according to the mass dryness fraction of the notes steam flow amount of boiler, pressure, boiler operatiopn is 80% standard vapour amount.Storage 17.2MPa, mass dryness fraction are the heat enthalpy value of 80% standard moist steam, by the steam injection pressure that monitors, notes vapour mass dryness fraction calculates actual moist steam in holder heat enthalpy value, by monitoring to such an extent that discharge is come basis of calculation vapour amount.
Standard vapour amount=(heat enthalpy value of the heat enthalpy value ÷ standard moist steam of actual moist steam) * discharge.
In addition, data show to adopt the Kunlun on-state 7 " liquid crystal touch screen; show the relevant parameters such as mass dryness fraction, feedwater conductivity, stove water conductivity, standard vapour amount of notes steam flow amount, pressure, the boiler operatiopn of boiler, and have curve demonstration, cumulative amount, zero clearing such as adds up again at function.Write down a secondary data in per 5 minutes, and can write down the capacity of 10 day data.
There is not floor type modularization PLC as controller with OMRONCJ1G, CPU only is installed as required, power supply, analog module just can be realized data acquisition, in PLC inside, the electrical conductivity of gathering is carried out the engineering quantity conversion, dryness of wet steam is obtained in calculating, latest edition IAPWS-97 thermodynamic data table is arranged in the data field (D district) of PLC, call the linear interpolation instruction APR of PLC, according to the steam pressure value that monitors, calculate the saturated vapour under this pressure and the heat enthalpy value of saturation water, and, press public affairs and calculate boiler operatiopn standard vapour amount with the boiler feedwater flow of gathering, instantaneous calorific value flow.
With reference to accompanying drawing 8: the present invention is PLC power supply and direct current 24V power supply distribution by double-pole switch, and the PLC power supply provides power supply for modular PLC, and direct current 24V power supply is for isolation mode, touch-screen provide the operation power supply.
The nuclear core that adopts the strong OMRON CJ1G PLC of industrial usability to handle as variable monitoring, data, expansion analog quantity modules A D081, realize the acquisition process of variable, be connected by the touch-screen of RS232 electric interfaces with the Kunlun on-state of 7 cun, on touch-screen, show variable and mark steam flow amount, satisfy the produced on-site needs.
In order to improve the analog signals antijamming capability, guarantee the reliability of collection, analog quantity enters analog module AD081 by isolation module and gathers.
Claims (7)
1. steam-filling quality monitoring instrument for steam-filling boiler, it is characterized in that: mainly form by mass dryness fraction monitoring, flow monitoring, pressure monitoring and data processes and displays unit, mass dryness fraction monitoring, flow monitoring and pressure monitoring instrument are installed respectively on injection boiler, described mass dryness fraction monitoring, flow monitoring and pressure monitoring instrument are connected data processes and displays unit respectively, show the mass dryness fraction of boiler operatiopn, notes steam flow amount, pressure, feedwater conductivity, stove water conductivity and the standard vapour amount relevant parameter of boiler.
2. steam-filling quality monitoring instrument for steam-filling boiler according to claim 1, it is characterized in that: described mass dryness fraction monitoring instrument is in outlet of steam boiler the high pressure orifice plate to be installed, the upper end outlet of high pressure orifice plate is communicated with high-pressure conduit, high-pressure conduit is communicated with differential pressure pick-up, and the PLC circuit carries out data and handles to calculate and annotate the vapour mass dryness fraction obtaining before and after the orifice plate pressure reduction.
3. steam-filling quality monitoring instrument for steam-filling boiler according to claim 1, it is characterized in that: described mass dryness fraction monitoring instrument is in outlet of steam boiler steam-water separator to be installed, steam-water separator is communicated with condensing heat exchanger by reducing valve, one end of electrical conductivity sampler connects condensing heat exchanger, the other end connects the inlet of injection boiler, draws the dryness of wet steam of boiler reality by the electrical conductivity of monitoring condensation electrical conductivity of water and feedwater.
4. steam-filling quality monitoring instrument for steam-filling boiler according to claim 1, it is characterized in that: described flow monitoring instrument is to connect boiler plunger displacement pump, differential pressure transmitter and pneumatic flowmeter outside injection boiler, between differential pressure transmitter and pneumatic flowmeter, connect pneumatic-to-current converter, the gas signal is converted into the feedwater flow value that the signal of telecommunication draws boiler.
5. steam-filling quality monitoring instrument for steam-filling boiler according to claim 1, it is characterized in that: described flow monitoring instrument is the flow meter of giving the transmission of the water end (W.E.) mounting strap signal of telecommunication at injection boiler, flow meter connects boiler plunger displacement pump and differential pressure transmitter successively, the monitoring feedwater flow.
6. steam-filling quality monitoring instrument for steam-filling boiler according to claim 1, it is characterized in that: described flow monitoring instrument is to connect boiler plunger displacement pump and differential pressure transmitter outside injection boiler, on plunger displacement pump, connect frequency converter, can enroll frequency conversion electricity hertz signal monitoring feedwater flow.
7. steam-filling quality monitoring instrument for steam-filling boiler according to claim 1 is characterized in that: described pressure monitoring instrument is a setting pressure sensor admission steam injection pressure signal on the outlet line of injection boiler, and the outlet pressure of injection boiler is monitored.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100196745A CN101504136B (en) | 2009-03-10 | 2009-03-10 | Steam-filling quality monitoring instrument for steam-filling boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100196745A CN101504136B (en) | 2009-03-10 | 2009-03-10 | Steam-filling quality monitoring instrument for steam-filling boiler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101504136A CN101504136A (en) | 2009-08-12 |
| CN101504136B true CN101504136B (en) | 2011-02-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009100196745A Expired - Fee Related CN101504136B (en) | 2009-03-10 | 2009-03-10 | Steam-filling quality monitoring instrument for steam-filling boiler |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102735577A (en) * | 2011-04-11 | 2012-10-17 | 辽宁石油化工大学 | Volume-changing type oil field steam-injection boiler wet steam dryness detection method and detection device |
| CN102353412B (en) * | 2011-07-08 | 2013-04-03 | 中国计量科学研究院 | Wet saturated vapor dryness and flow integral measurement device and measurement method |
| CN112229877A (en) * | 2020-10-26 | 2021-01-15 | 新奥数能科技有限公司 | Conductivity monitoring method, device and system for boiler front end side feed water |
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2009
- 2009-03-10 CN CN2009100196745A patent/CN101504136B/en not_active Expired - Fee Related
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Granted publication date: 20110216 Termination date: 20160310 |