CN101187660B - Double-slot type porous plate type mixed transportation metering device - Google Patents
Double-slot type porous plate type mixed transportation metering device Download PDFInfo
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- CN101187660B CN101187660B CN2006100990647A CN200610099064A CN101187660B CN 101187660 B CN101187660 B CN 101187660B CN 2006100990647 A CN2006100990647 A CN 2006100990647A CN 200610099064 A CN200610099064 A CN 200610099064A CN 101187660 B CN101187660 B CN 101187660B
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Abstract
The invention relates to a mixed transportation measuring device with a double-slot type and a perforated plate shape, which belongs to an on-line measuring instrument for high gas and condensate gas. A multiphase measuring meter has big errors when condensate natural gas is measured. The mixed transportation measuring device with the double-slot type and the perforated plate shape of the invention is formed through connecting an upper steam connecting flange, a measuring strait tube, an upper stream pressure taking device, a pressure stabilizing strait tube, a lower stream pressure taking device, a lower stream strait tube and a lower stream connecting flange in turn. A pressure transmitter is arranged on the lower stream strait tube, two pieces of slot-type perforated plates are arranged respectively in the upper stream pressure taking device and the lower stream pressure taking device, a temperature transmitter is arranged on the lower stream strait tube, and each transmitter is connected with a computer. Flowing processing software of the mixed transportation measuring device with the double-slot type and the perforated plate shape which is worked out according to a Murdock measuring model formula and artificial neural network technology transforms collected signals of pressures, pressure differences and temperatures into gas liquid flow quantity data, the flow quantity which is calculated is corrected through adopting the artificial neural network technology, and a final gas liquid measuring value is obtained.
Description
Technical field
The present invention relates to a kind of double-slot type porous plate type mixed transportation metering device, be mainly used in the heterogeneous metering of the CONDENSATE OIL AND GAS of high gassiness, belong to the on-line metering instrument that the oil-gas gathering and transportation pipeline is used in the petroleum industry.
Background technology
From 80 year-to-date; Multiphase Fluid Measurement Technology has obtained impressive progress both at home and abroad; Up to now; Internationally recognizedly reach commercialized degree and obtain comparatively that the multi-phase flowmeter product of extensive experimentation and application comprises: the Agar-301/401 of U.S. Agar company in industry spot; The MFM2000 of the silent company of China sea, the VEGA flowmeter of the PECO flowmeter of the V-Cone flowmeter of the Framo multi-phase flowmeter of Fluenta 1900 VI of Norway Roxor company and RFM flowmeter, Norway Framo company, the MEGRA flowmeter of U.S. Daniel company, McCrometer company, the DualStream flowmeter of Britain Solartron company and U.S. PECO company, Italian TEA company etc.These multiphase flow rate meters can reach 10% with 90% fiducial probability with interior gas-liquid phase measuring accuracy limiting under the operating mode.But because influences such as the variation of service condition and propagation of error, under some operating mode, the limit that profit phase uncertainty of measurement maybe be head and shoulders above ± 10%.Existing multi-phase flowmeter is that 10% ~ 90% oil-gas-water three-phase flow is measured to liquid holdup mostly, if directly be used for measuring liquid holdup less than 10% condensation rock gas, because the liquid phase content exceeds its scope of application, error is inevitable very big.The multi-phase flowmeter that can directly be used for the condensation gas metering only has Dual Stream II, V-Cone, PECO and four kinds of products of VEGA at present; Wherein DualStream II flowmeter has been applied to the production scene, and all the other products still are in laboratory research and development and site test stage.
Summary of the invention
The objective of the invention is to develop the multi-phase mixed delivering flow apparatus of the oil gas field that is applicable to high gassiness, realize not separating the on-line metering of condensation rock gas.
In the practice; In line with reducing cost, improve the requirement of measuring accuracy, selected the model of Murdock relational expression for use as the heterogeneous oil gas metering device of development of new; The Murdock relational expression is based on orifice flowmeter; Through AND DEWATERING FOR ORIFICE STRUCTURE is improved and various emulation experiment, reach measuring the correction of result of calculation, develop the heterogeneous WT-MSR of price comparison economy.
Double-slot type porous plate type mixed transportation metering device of the present invention has selected for use slotted orifice plate as a throttling sensing element; Slotted orifice plate is by having constituting with the tangent circular slab of inner-walls of duct of slotted eye; Slotted eye on the circular slab by at least one circle concentric and radially equally distributed slot type aperture form, circular slab outer rim and inner-walls of duct are tangent.In the practice, the slot type aperture of slotted orifice plate is designed to three circles around the circular slab axle center, and radially is evenly distributed on the circular slab of slotted orifice plate.
It adopts following technical scheme double-slot type porous plate type mixed transportation metering device of the present invention; Be that a kind of double-slot type porous plate type mixed transportation metering device is connected in sequence by upper reaches joint flange, measurement straight tube, upper reaches pressure obtaning device, voltage stabilizing straight tube, downstream pressure obtaning device, downstream straight tube and downstream joint flange; It is characterized in that measuring straight tube and be provided with pressure unit; Be equipped with a slice slotted orifice plate in upper reaches pressure obtaning device and the downstream pressure obtaning device; On the straight tube of downstream, be provided with temperature transmitter, each transmitter is connected with computing machine.
Upper reaches pressure obtaning device is identical with downstream pressure obtaning device structure, but the aperture ratio of the slotted orifice plate that the upper reaches and downstream are selected for use can be identical, also can be different.
Use A
SlotExpression institute grooved hole area summation, A represent that pipeline section is long-pending, and D is that pipe diameter, d are the standard orifice plate apertures, and the aperture ratio of slotted orifice plate is defined as:
Pressure obtaning device be by pressure obtaning device housing and the slotted orifice plate that places the housing inner chamber be placed in the forward and backward pressure arm that communicates with pressure obtaning device housing inner chamber of slotted orifice plate both sides, and pressure flange and the kapillary impulse pipeline and the pressure difference transmitter that are connected on the forward and backward pressure arm connect and compose.
Be provided with spring diaphragm at pressure flange and kapillary impulse pipeline junction.End at the pressure arm is equipped with valve.
When double-slot type porous plate type mixed transportation metering device uses; Level is installed in the pipeline, and in pressure drop, temperature and pressure were measured, pressure detection was selected the ROSEMOUNT table for use; Differential pressure detects selects differential pressure transmitter for use, and temperature is measured by temperature sensor (temperature transmitter) in real time.
For preventing that the impurity in the line fluid from stopping up the slotted orifice plate of throttling, filtrator need be installed at the double-slot type porous plate type mixed transportation metering device inlet.
In the practice, gas-liquid two-phase is flowed through behind the slotted orifice plate, and the voltage stabilizing straight length about 3 times of pipe diameter length has returned to the flow state at the upper reaches; Pressure obtaning device before and after explaining; When being dual grooved orifice plate Combination application, middle voltage stabilizing flow development length can suitably shorten, and gets 5 to 6 times of pipe diameter length; Can make flowmeter structure compact; In addition, the small-bore is more responsive to the variation of liquid phase content than restricting element (slotted orifice plate), selects for use the small-bore to help improving the condensation natural gas liquids phase flow rate measuring accuracy of low liquid holdup than restricting element.
Technical scheme according to double-slot type porous plate type mixed transportation metering device; Its measuring principle is to utilize Murdock metering model relational expression and artificial neural network technology to work out double-slot type porous plate type mixed transportation metering device flow process software---intelligent software system; Set SF through software processes; Pressure, pressure reduction and the temperature signal gathered are converted into the gas-liquid data on flows, utilize the artificial neural network system that flow is revised again, draw final gas-liquid variable.
In practice, utilize the heterogeneous gas discharge Survey Software of Murdock relational expression, with two slotted orifice plate differential pressure Δ P that record
1, Δ P
2With inlet pressure P, outlet temperature T totally 4 measured values; Handle back output gas-liquid separate phase flow rate, phase-splitting integrated flux, fluid temperature (F.T.), pressure and other parameters through certain calculation; Calculate gained flow value and actual error this moment in 20%; Through the artificial neural network system data are revised again, the error calculated rate is reached in 10%.
In practice, utilize between gas-liquid flow value that above-mentioned intelligent software systematic survey obtains and the actual value and coincide better, under 90% fiducial probability, gas liquid ratio is at 200～650Nm
3/ m
3In the scope, the gas flow measurement error is less than ± 5%, and liquid has reached the measuring accuracy requirement less than ± 10%.
Description of drawings
Fig. 1, the double-slot type porous plate type mixed transportation metering device structural representation
Among Fig. 1, pressure unit 1, upper reaches differential pressure transmitter 2, downstream differential pressure transmitter 3, temperature transmitter 4, upper reaches slotted orifice plate 5, downstream slotted orifice plate 6, computing machine 20.
Fig. 2, double-slot type porous plate type mixed transportation metering device line construction and signal measurement synoptic diagram
Among Fig. 2, pressure unit 1, upper reaches differential pressure transmitter 2, downstream differential pressure transmitter 3, temperature transmitter 4; Upper reaches slotted orifice plate 5, downstream slotted orifice plate 6, upper reaches joint flange 7 is measured straight tube 8, upper reaches pressure obtaning device 9; Voltage stabilizing straight tube 10, downstream pressure obtaning device 11, downstream straight tube 12, preceding pressure arm 13, back pressure arm 14; Pressure flange 15, spring diaphragm 16, kapillary impulse pipeline 17, valve 18, downstream joint flange 19.
Embodiment
Below in conjunction with accompanying drawing and embodiment double-slot type porous plate type mixed transportation metering device of the present invention is further specified; Double-slot type porous plate type mixed transportation metering device is installed on the oil-gas pipeline of horizontal arrangement of diameter D=50mm; Be connected in sequence by upper reaches joint flange 7, measurement straight tube 8, upper reaches pressure obtaning device 9, voltage stabilizing straight tube 10, downstream pressure obtaning device 11, downstream straight tube 12 and downstream joint flange 19; On measurement straight tube 8, be provided with pressure unit 1; Respectively be provided with a slice slotted orifice plate in upper reaches pressure obtaning device 9 and the downstream pressure obtaning device 11, on downstream straight tube 12, be provided with temperature transmitter 4, each transmitter is connected with computing machine 20.
Upper reaches pressure obtaning device 9 is identical with downstream pressure obtaning device 11 structures, and the slotted orifice plate aperture ratio that upper reaches pressure obtaning device is selected for use is 0.75, and the slotted orifice plate aperture ratio that the downstream pressure obtaning device is selected for use is 0.5.Wherein, Upper reaches pressure obtaning device 9 is by the housing of pressure obtaning device 9 and the preceding pressure arm 13 that communicates with pressure obtaning device housing inner chamber, the back pressure arm 14 of the slotted orifice plate that places the housing inner chamber 5 and the slotted orifice plate both sides that are placed in, and the pressure flange 15 that is connected on the forward and backward pressure arm connects and composes with kapillary impulse pipeline 17 and upper reaches pressure difference transmitter 2.Be provided with spring diaphragm 16 in pressure flange 15 and kapillary impulse pipeline 17 junctions.End at pressure arm 13 is equipped with valve 18.
Middle voltage stabilizing flow development length is taken as 5 times of pipe diameter length, i.e. 250mm.
Claims (2)
1. a double-slot type porous plate type mixed transportation metering device is connected in sequence by upper reaches joint flange (7), measurement straight tube (8), upper reaches pressure obtaning device (9), voltage stabilizing straight tube (10), downstream pressure obtaning device (11), downstream straight tube (12) and downstream joint flange (19); It is characterized in that measuring straight tube (8) and be provided with pressure unit (1); Respectively be provided with a slice slotted orifice plate in upper reaches pressure obtaning device (9) and the downstream pressure obtaning device (11); On downstream straight tube (12), be provided with temperature transmitter (4), each transmitter is connected with computing machine (20).
2. double-slot type porous plate type mixed transportation metering device as claimed in claim 1 is characterized in that upper reaches pressure obtaning device (9) is identical with downstream pressure obtaning device (11) structure.
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| CN2006100990647A CN101187660B (en) | 2006-07-18 | 2006-07-18 | Double-slot type porous plate type mixed transportation metering device |
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| CN2006100990647A CN101187660B (en) | 2006-07-18 | 2006-07-18 | Double-slot type porous plate type mixed transportation metering device |
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| CN101187660B true CN101187660B (en) | 2012-01-11 |
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| CN102435249A (en) * | 2011-10-19 | 2012-05-02 | 南京钢铁股份有限公司 | Connection method of pore plate and pipeline |
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| CN111721370B (en) * | 2020-05-19 | 2022-08-26 | 中国石油大学(北京) | Double-nozzle natural gas flow measuring device and system based on differential pressure |
| CN114184241A (en) * | 2020-09-14 | 2022-03-15 | 中核核电运行管理有限公司 | Method for improving measurement stability of differential pressure flow of bubble-containing liquid of pressurized water reactor |
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Effective date of registration: 20170222 Address after: 100007 Beijing, Dongzhimen, North Street, No. 9, No. Patentee after: China National Petroleum Corporation Patentee after: China Petroleum Pipeline Bureau Engineering Co., Ltd. Patentee after: China University of Petroleum Address before: 100724 Beijing, Xicheng District, shop No. 6 Kang Street, No. six Patentee before: China National Petroleum Corporation Patentee before: China Petroleum and Natural Gas Pipeline Bureau Patentee before: China University of Petroleum |