CN103453962A - Device and method for measuring flow and steam dryness of steam-water two-phase fluid in real time - Google Patents
Device and method for measuring flow and steam dryness of steam-water two-phase fluid in real time Download PDFInfo
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Abstract
The invention relates to a device and method for measuring flow and steam dryness of steam-water two-phase fluid in real time. The device comprises a measurement pipe section, a differential pressure transmitter, a constant-height container, a pressure transmitter, a temperature measurement component, a temperature transmitter, a signal conversion device, an IPC (Industrial Personal Computer) signal processing system and a display, wherein the measurement pipe section is formed by sequentially connecting four identical 90-degree bent pipes in the same vertical plane; the differential pressure transmitter, the constant-height container, the pressure transmitter, the temperature measurement component and the temperature transmitter are respectively connected to the measurement pipe section. On the premise of obtaining average flow of the vapor-water two-phase fluid in the measurement pipe section and apparent density of the fluid in the measurement pipe section by measurement, the volume dryness of the fluid in a pipe and mass flow of the vapor-water two-phase fluid are obtained; by calibration of assay dryness, the volume dryness can indicate mass dryness of a working medium at an outlet of a steam-injection boiler under different loads in real time, so that real-time measurement on the steam dryness and the mass flow of the saturated steam and saturated water two-phase fluid at the outlet of the steam-injection boiler is implemented.
Description
Technical field
The present invention relates to polyphasic flow detection technique field, particularly a kind of steam-water two-phase body flow and steam quality real-time measurement apparatus and measuring method thereof of uphole steam generator outlet.
Background technology
The viscous crude of containing in the oil field oil-containing stratum need add after oil displacement agent makes its mobility increase and can be plucked out of.Water vapour is one of oil displacement agent usually adopted.Injection boiler is heated into feedwater the steam water interface of state of saturation, is injected into oil-bearing strata, reaches the purpose of the displacement of reservoir oil.Because there is the latent heat of vaporization in vapour phase, with the liquid phase of equality of temperature, homogenous quantities, compare, the heat that the heat that vapour phase is carried carries far more than liquid phase, therefore in the outlet steam-water two-phase, the shared quality share of steam is larger, the injection boiler oil displacement efficiency is higher.For the purpose reduced costs, in the injection boiler feedwater, only removed [
ca 2+], [
mg 2+] plasma, and do not eliminate [
na +], [
k +] plasma, or will from oil well produced oil, gas, water, husky heterogeneous fluid through oil, gas, moisture from after the mining wastewater precipitation after, directly as the feedwater of injection boiler, so have salt in boiler feed water.With the solubleness in synthermal water, compare, the solubleness of salt in saturated vapor can be ignored, and enters into the salt of boiler water wall pipeline with feedwater, and main liquid phase saturation water in boiler export working medium sets out.If outlet of steam boiler steam-water two-phase steam quality is too high, stove water is violent because of the evaporation of heat exchange surface in water-cooling wall, and the salt in stove water is separated out, and adheres to the water-cooling wall inside surface and forms incrustation scale, and the heat-transfer surface thermal resistance is increased, and causes water-cooling wall because of metal overtemperature and booster; If outlet of steam boiler steam-water two-phase steam quality is too low, the heat carried except the working medium of unit mass less, also due to the radiation loss in the flow process to the oil reservoir pipeline, a part of saturated vapour wherein discharges the latent heat of vaporization in pipeline, become saturation water, it is too high that this just makes to arrive in oil reservoir oil displacement agent working medium Liquid water content, except oil displacement efficiency is poor, these aqueous waters also will absorb next round steam injection heat, cause cost for oil production to increase.Therefore the quality of steam mass dryness fraction of technological requirement outlet of steam boiler steam-water two-phase is 80%.As can be seen here, the detection of steam quality is directly related with performance driving economy with the injection boiler device security.
Outlet working medium mass dryness fraction detects and belongs to the gas-liquid two-phase flow parameter measurement in real time, owing to existing alternate power in flow process and at the phase interface of time and space random variation, make flowing of steam-water two-phase very complicated, can't reappear, be focus and the difficult point of engineering circles, academia's research recent decades always.
CN201327400 discloses " two phase flow of damp steam amount meter ", has put down in writing a kind of saturated vapor-saturation water two-phase fluid (i.e. this patent specification alleged " wet saturated steam two-phase flow ") flow-measuring method.Its device is comprised of vertical pipeline section, restricting element and the measurement of measuring total flow, the flow computer of demonstration use, on vertical pipeline section, differential pressure pick-up and pressure transducer are housed, differential pressure pickup is equipped with at two ends at throttling element, the data that three sensors record are delivered to flow computer, and the mathematical model of each phase flow rate of the measurement through storing in flow computer, total flow and steam quality and the parameter program of various materials show every measurement result after being calculated.There are the following problems for this technology: at first the density of the interior condensate water of pressure guiding pipe of its interior working medium of measurement vertical uplift pipeline upstream and downstream differential pressure is on the uncompensated measure of the impact of differential pressure measurement.Because condensate water density and temperature, pressure are relevant, especially variation with temperature is larger, and the additive error caused has a negative impact to measuring accuracy; Secondly, implement this technology and generally need 4 90 ° of elbows that bending radius is little, this has caused the very large pressure loss to the steam-water two-phase body, experiment shows, pipeline for Φ 69 * 3, when working pressure is 7MPa, the wet saturated steam of 80% mass dryness fraction is flowed through the said apparatus pressure loss higher than 1.5MPa, and in reality, this is unacceptable energy loss; The 3rd, its device adopts throttling element, make flow section that contraction occur, experiment shows, the pressure loss before and after throttling element is different from monophasic fluid, and the pressure loss of steam-water two-phase body before and after throttling element, under identical opening diameter ratio, be several times as much as monophasic fluid, be unfavorable for that injection boiler improves steam injection efficiency.
Summary of the invention
The object of the present invention is to provide a kind of steam-water two-phase body flow and steam quality real-time measurement apparatus and measuring method thereof, compared with prior art, reliability, the validity of measurement result obviously improve; When the working conditions change such as temperature, still can Measurement accuracy mass dryness fraction and flow; The working medium pressure loss that measurement mechanism produces of flowing through is far smaller than existing measurement mechanism.
Technical scheme of the present invention is: this steam-water two-phase body flow and steam quality real-time measurement apparatus, comprise the measurement pipeline section be connected between process pipe, the measuring element be connected with the measurement pipeline section, the signal converter part be connected with measuring element, receive signal that each signal converter part sends and to its analysis, the industrial computer signal processing system of calculating, the display be connected with the output terminal of industrial computer signal processing system, its special character is: described measurement pipeline section is connected to form in same vertical plane successively by 4 90 ° of identical bend pipes, be respectively the first bend pipe, the second bend pipe, the 3rd bend pipe and the 4th bend pipe, described the second bend pipe and the 3rd bend pipe form to 180 ° of recessed bend pipes, 45 ° to upper left of described the first bend pipes are recessed and be connected with the second bend pipe as entrance, 45 ° to upper right recessed connections with the 3rd bend pipe as outlet of described the 4th bend pipe,
Described measuring element is by the first differential pressure transmitter, the 3rd differential pressure transmitter, the second differential pressure transmitter that are connected on first, second and third bend pipe, the high container of perseverance be connected with described the second bend pipe, the pressure unit be connected with the bottom pressure guiding pipe of the high container of perseverance, be located at respectively the first temperature element, the second temperature element on permanent high container and its bottom pressure guiding pipe metal wall, and temperature transmitter forms.
The protruding side wall surface that described the second bend pipe top flows to back to intraductal working medium is offered the first pressure port and is utilized pressure guiding pipe to connect the high container of described perseverance, the protruding side wall surface that described the second bend pipe bottom flows to back to intraductal working medium is offered the second pressure port and is connected with the negative pressure chamber of the 3rd differential pressure transmitter by condensing coil, pressure guiding pipe, and the plemum of described the 3rd differential pressure transmitter is connected with the pressure guiding pipe of the high container bottom of described perseverance.
The first malleation pressure tappings and the first negative pressure pressure tappings are offered respectively in the outer rim of described the first bend pipe and inner edge corresponding section, described the first malleation pressure tappings is connected with the plemum of described the first differential pressure transmitter by pressure guiding pipe after connecting the first drainer, and described the first negative pressure pressure tappings is connected with the negative pressure chamber of described the first differential pressure transmitter by pressure guiding pipe after connecting the second drainer.
The second malleation pressure tappings and the second negative pressure pressure tappings are offered respectively in the outer rim of described the 3rd bend pipe and inner edge corresponding section, be connected with the plemum of described the second differential pressure transmitter by pressure guiding pipe after described the second malleation pressure tappings connects the 3rd drainer, be connected with the negative pressure chamber of described the second differential pressure transmitter by pressure guiding pipe after described the second negative pressure pressure tappings connects the 4th drainer.
Described signal converter part, by the current/voltage converter be connected with the pressure unit output terminal with described first, second and third differential pressure transmitter respectively, sends to the analog to digital converter of industrial computer signal processing system to form the switching signal of described temperature transmitter and current/voltage converter.
The described first positive and negative pressure tappings is located at respectively described the first vertical plane, bend pipe place along upper left--and lower right is to surface level, becoming counterclockwise outer rim and the inner edge position at 135 ° of angles, to reach the optimum detection effect.
Described the second positive and negative pressure pressure tappings is located at described the 3rd vertical plane, bend pipe place along upper right-lower left to the outer rim with the counterclockwise angle at 45 ° of surface level and inner edge position, to reach the optimum detection effect.
The measuring method of a kind of steam-water two-phase body flow as above and steam quality real-time measurement apparatus, its measuring process is as follows:
The first step, the first and the 3rd bend pipe that form to measure pipeline section is respectively as the differential pressure flow sensor of elbowmeter, when fluid is flowed through this sensor, flow section does not change, the flow velocity of intraductal working medium is converted to differential pressure, the first and the 3rd bend pipe output differential pressure is measured by the first differential pressure transmitter and the second differential pressure transmitter respectively, and the arithmetic mean value of above-mentioned two differential pressures characterizes measures steam-water two-phase body mean flow rate in pipeline section;
Second step, the protruding upper lateral part that the second bend pipe be connected with the first bend pipe as entrance flows to back to working medium, the first pressure port and the second pressure port are offered respectively in bottom, the first pressure port is received working medium the plemum of the 3rd differential pressure transmitter by the high container of perseverance by pressure guiding pipe, the second pressure port is received working medium the negative pressure chamber of the 3rd differential pressure transmitter by condensing coil by pressure guiding pipe, first, the second temperature element and temperature transmitter record permanent high container and neutralize the condensate temperature in its bottom pressure guiding pipe, pressure unit records the power pressure in process pipe, obtain thus condensate water density in permanent high container and bottom pressure guiding pipe thereof, the height of permanent high container is steady state value, thereby determine permanent high container output static pressure, the 3rd differential pressure transmitter has been measured static pressure poor of steam-water two-phase body formation on static pressure that condensate water post in permanent high container forms and the second bend pipe elevation, under the prerequisite of measuring carbonated drink two-phase working medium mean flow rate, tried to achieve the apparent density of measuring the pipeline section inner fluid by this differential pressure,
The 3rd step, try to achieve volume mass dryness fraction and the steam-water two-phase weight flow of tube fluid, the volume mass dryness fraction is demarcated through the chemical examination mass dryness fraction, can indicate in real time outlet of steam boiler working medium quality mass dryness fraction under different load, thereby realize the saturated vapor saturation water two-phase fluid steam quality of outlet of steam boiler and the real-time measurement of mass rate.
the invention has the beneficial effects as follows:
The present invention adopts Separating Flow Pattern to realize the real-time online of steam-water two-phase is detected, and mathematical model approaches the steam-water two-phase Real Flow Field state under operating condition more.The measurement pipeline section that the present invention adopts 4 90 ° of bend pipes in same vertical plane to be connected and to form, the first and the 3rd bend pipe is respectively as the differential pressure flow sensor of elbowmeter, when fluid is flowed through this sensor, flow section does not change, the flow velocity of intraductal working medium is converted to differential pressure, the first and the 3rd bend pipe output differential pressure is measured by the first differential pressure transmitter and the second differential pressure transmitter respectively, and the arithmetic mean value of above-mentioned two differential pressures characterizes measures steam-water two-phase body mean flow rate in pipeline section.Characterize flow with its arithmetic mean again after two differential pressures why utilizing two bend pipes to export, be because it has eliminated the formed static pressure of vapour-liquid two-phase flow scapus in the pipe presses and measure the impact caused the flow signal difference, improve reliability, the accuracy of measurement result.
First, the second temperature element and temperature transmitter record permanent high container and neutralize the condensate temperature in its bottom pressure guiding pipe, pressure unit records the power pressure in process pipe, obtain thus condensate water density in permanent high container and bottom pressure guiding pipe thereof, the height of permanent high container is steady state value, thereby determine permanent high container output static pressure, the 3rd differential pressure transmitter has been measured static pressure poor of steam-water two-phase body formation on static pressure that condensate water post in permanent high container forms and the second bend pipe elevation, under the prerequisite of measuring carbonated drink two-phase working medium mean flow rate, tried to achieve the apparent density of measuring the pipeline section inner fluid by this differential pressure, wherein bend pipe curvature of centre radius can choose reasonable, to guarantee the fluid apparent density, measure, the sensitivity of fluid-velocity survey and controlled pressure are lost in allowed band, compared with prior art, greatly reduce the pressure loss,
The volume mass dryness fraction is demarcated through the chemical examination mass dryness fraction, can indicate in real time outlet of steam boiler working medium quality mass dryness fraction under different load, thereby realize the saturated vapor saturation water two-phase fluid steam quality of outlet of steam boiler and the real-time measurement of mass rate.
In addition, flow sensor pipeline section involved in the present invention is without any mechanical movable member, thus there is high reliability and stability, thus extended the serviceable life of whole device.
The accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
In figure: the negative pressure tappings 102 of first bend pipe the 1, first positive pressure tappings 101, first; The second bend pipe 2, the first pressure port 201, the second pressure port 202; The negative pressure tappings 302 of the 3rd bend pipe the 3, second positive pressure tappings 301, second; The 4th bend pipe 4; The first drainer 5, the second drainer 6, the 3rd drainer 7; The 4th drainer 8; Permanent high container 9; Pressure unit 10; The first differential pressure transmitter 11, the 3rd differential pressure transmitter 12, the second differential pressure transmitter 13; Condensing coil 14; The first temperature element 15, the second temperature element 16; The first temperature transmitter 17, the second temperature transmitter 18; Industrial computer signal processing system 19; Display 20.
Embodiment
Referring to Fig. 1, this steam-water two-phase body flow and steam quality real-time measurement apparatus, comprise the measurement pipeline section be connected between the outlet of steam boiler process pipe, the measuring element be connected with the measurement pipeline section, the signal converter part be connected with measuring element, receive the signal of each signal converter part transmission the industrial computer signal processing system 19 that it is analyzed, calculates, the display 20 be connected with the output terminal of industrial computer signal processing system 19.
Wherein said measurement pipeline section is connected to form in same vertical plane successively by 4 90 ° of identical bend pipes, and the internal diameter that is respectively the first bend pipe 1, the second bend pipe 2, the 3rd bend pipe 3 and 4, four bend pipes of the 4th bend pipe is identical with the internal diameter of process pipe.Described the second bend pipe 2 and the 3rd bend pipe 3 form to 180 ° of recessed bend pipes, 45 ° to upper left of the first bend pipes 1 are recessed and be connected with the second bend pipe 2 as entrance, 45 ° to upper right recessed connections with the 3rd bend pipe 3 as outlet of described the 4th bend pipe 4, detected fluid flows into from the first bend pipe 1 openend, from the 4th bend pipe 4 openends, flows out.Described measuring element is by the first differential pressure transmitter (DP be connected on first, second and third bend pipe 1,2,3
1) the 11, the 3rd differential pressure transmitter (DP
3) the 13, second differential pressure transmitter (DP
2) 12, the high container 9 of perseverance be connected with described the second bend pipe 2, the pressure unit 10 be connected with the bottom pressure guiding pipe of the high container 9 of perseverance, be located at respectively the first temperature element 15, the second temperature element 16 on permanent high container 9 and its bottom pressure guiding pipe metal wall, and the first temperature transmitter (WB be connected with the first temperature element 15, the second temperature element 16 respectively
1) the 17 and second temperature transmitter (WB
2) 18 compositions.Described signal converter part is by the current/voltage converter (I/V) be connected with pressure unit 10 output terminals with described first, second and third differential pressure transmitter 11,12,13 respectively, by the first temperature transmitter (WB
1) 17
,the second temperature transmitter (WB
2) 18 and the switching signal of current/voltage converter (I/V) send to industrial computer signal processing system 19(IPC) modulus converter A/D form.
The protruding side wall surface that described the second bend pipe 2 tops flow to back to intraductal working medium is offered the first pressure port 201 and is utilized pressure guiding pipe to connect the high container of described perseverance 9 tops, the protruding side wall surface that described the second bend pipe 2 bottoms flow to back to intraductal working medium is offered the second pressure port 202 and is connected with the negative pressure chamber of the 3rd differential pressure transmitter 13 on a surface level with it by condensing coil 14, pressure guiding pipe, and the plemum of described the 3rd differential pressure transmitter 13 is connected with the pressure guiding pipe of the high container of described perseverance 9 bottoms.
Described the first bend pipe 1 is offered respectively the first positive and negative pressure tappings 101,102 in its outer rim and inner edge, in the present embodiment, the first positive and negative pressure tappings 101,102 is located to the first bend pipe 1 vertical plane, place along upper left--lower right is to becoming counterclockwise outer rim and the inner edge position at 135 ° of angles with surface level, and experiment shows best results herein.Be connected with the plemum of described the first differential pressure transmitter 11 by pressure guiding pipe after described the first malleation pressure tappings 101 connects the first drainer 5, be connected with the negative pressure chamber of described the first differential pressure transmitter 11 by pressure guiding pipe after described the first negative pressure pressure tappings 102 connects the second drainer 6.Described the 3rd bend pipe 3 is offered respectively the second positive and negative pressure pressure tappings 301,302 in its outer rim and inner edge corresponding section, in like manner, in the present embodiment, the second positive and negative pressure pressure tappings 301,302 is located to the 3rd bend pipe 3 vertical planes, place along upper right-lower left to the outer rim with the counterclockwise angle at 45 ° of surface level and inner edge position.Be connected with the plemum of described the second differential pressure transmitter 12 by pressure guiding pipe after described the second malleation pressure tappings 301 connects the 3rd drainer 7, be connected with the negative pressure chamber of described the second differential pressure transmitter 12 by pressure guiding pipe after described the second negative pressure pressure tappings 302 connects the 4th drainer 8.
Job step of the present invention:
1, the steam-water two-phase body differential pressure that the first bend pipe 1 forms in inside and outside both sides of flowing through
with the differential pressure of the 3rd bend pipe 3 in the formation of inside and outside both sides of flowing through
measured by the first differential pressure transmitter 11, the second differential pressure transmitter 12 respectively, according to industrial computer signal processing system 19, try to achieve average differential pressure:
According to the steam-water two-phase rate of flow of fluid
with the average differential pressure in both sides inside and outside bend pipe
between relation:
(2) in formula,
rfor bend pipe curvature of centre radius,
dfor the process pipe internal diameter,
for steam-water two-phase stereoscopic in density,
coefficient of flow for bend pipe.
Why utilize two differential pressures of the first bend pipe 1, the second bend pipe 3 outputs
,
after again with its arithmetic mean
characterizing flow, is because average differential pressure
having eliminated the formed static pressure of vapour-liquid two-phase flow scapus in the pipe presses and measures the impact caused the flow signal difference.
2, pressure unit 10 has been measured the working pressure P of steam-water two-phase, and the physical parameter table (known) that industrial computer signal processing system 19 is looked into water according to the value of P obtains corresponding with it saturated water density
, saturated vapor density
:
First and second temperature element 15,16 is by measured temperature simultaneously
,
change into available signal, first and second temperature transmitter 17,18 is converted into the 1-5VDC voltage signal pro rata by it, and industrial computer signal processing system 19 is tried to achieve the medial temperature of condensate water in permanent high container 9 and pressure guiding pipe accordingly
.
Industrial computer signal processing system 19 bases
p, 
, look into water physical parameter table and obtain the average density of condensate water in permanent high container 9 and pressure guiding pipe
:
According to fluid mechanics principle, the differential pressure that the 3rd differential pressure transmitter 13 measures
for:
（6）
(6) in formula
pressure drop coefficient for sensor, can be considered constant, by experiment, determined;
hfor measuring the elevation of intraductal working medium.
By (2), (6), solved
Measured
,
,
, industrial computer signal processing system 19 is tried to achieve outlet of steam boiler steam-water two-phase working medium apparent density according to (1), (5), (7) formula
.
3, stereoscopic in density according to steam-water two-phase
with saturated water density
, saturated vapor density
and the average void fraction of the interior steam-water two-phase body of measuring tube
βbetween relation, have
(8) formula characterizes process pipe xsect steam area occupied percentage under operating condition, that is the volume mass dryness fraction of saturated vapor, in steam-water two-phase is moving, establishes external phase saturated vapor flow velocity
, the saturation water flow velocity
, experiment shows
much larger than
, establish the quality mass dryness fraction and be
η, according to definition, steam-water two-phase water vapour quality mass dryness fraction
η:
And have
(10)
(9), in (10) formula:
afor the process pipe cross-sectional area,
a sfor the shared area of steam on the process pipe xsect, steam-water two-phase body vapor phase flow velocity in pipeline
with the saturation water liquid phase flow rate
ratio be called Slip Ratio, be designated as
s
By (9) formula, (10) formula, tried to achieve
(11), (12), (13) formula are for connecting outlet of steam boiler steam-water two-phase body volume mass dryness fraction
βwith the quality mass dryness fraction
ηrelational expression, (11), (12), (13) formula show, the quality mass dryness fraction of outlet of steam boiler steam-water two-phase body steam
ηwith the volume mass dryness fraction
βthere is corresponding funtcional relationship.Therefore, under the load constant duty, can use the quality mass dryness fraction
ηdemarcate the volume mass dryness fraction
β, can adopt artificial chemical examination mass dryness fraction as the quality mass dryness fraction, (12) formula to be demarcated.So-called " chemical examination mass dryness fraction " means and chemically examines by artificial means the concentration that boiler feed water and boiler export working medium steam-water two-phase liquid phase are certain metal ion species or acid group in saturation water
,
value, and think and compare not saliferous of vapour phase with liquid phase, the liquid phase that the salt in boiler feed water all is enriched in the outlet steam-water two-phase is in saturation water, therefore the quality mass dryness fraction of (saturated) vapour (saturated) water two-phase fluid saturated vapour
ηcan be expressed as
(14) in formula
for certain metal ion species in boiler feed water or acid group concentration,
for certain metal ion species or acid group concentration in outlet working medium liquid phase.
So, under Separating Flow Pattern, the steam-water two-phase body volume mass dryness fraction of setting up
βwith the quality mass dryness fraction
ηone-to-one relationship, meaned by (12) formula or (13) formula, measured
βvalue, tried to achieve by (12) formula
η.4, due to steam-water two-phase weight flow
:
（15）
(15) in formula
rfor bend pipe curvature of centre radius,
dfor process pipe internal diameter under duty,
for the coefficient of flow of bend pipe,
for the apparent density of steam-water two-phase body,
.
Measured
,
,
by (7) formula, tried to achieve
, substitution (15) formula can be tried to achieve mass rate
.
Claims (8)
1. a steam-water two-phase body flow and steam quality real-time measurement apparatus, comprise the measurement pipeline section be connected between process pipe, the measuring element be connected with the measurement pipeline section, the signal converter part be connected with measuring element, receive signal that each signal converter part sends and to its analysis, the industrial computer signal processing system of calculating, the display be connected with the output terminal of industrial computer signal processing system, it is characterized in that: described measurement pipeline section is connected to form in same vertical plane successively by 4 90 ° of identical bend pipes, be respectively the first bend pipe, the second bend pipe, the 3rd bend pipe and the 4th bend pipe, described the second bend pipe and the 3rd bend pipe form to 180 ° of recessed bend pipes, 45 ° to upper left of described the first bend pipes are recessed and be connected with the second bend pipe as entrance, 45 ° to upper right recessed connections with the 3rd bend pipe as outlet of described the 4th bend pipe,
Described measuring element is by the first differential pressure transmitter, the 3rd differential pressure transmitter, the second differential pressure transmitter that are connected on first, second and third bend pipe, the high container of perseverance be connected with the second bend pipe, the pressure unit be connected with the bottom pressure guiding pipe of the high container of perseverance, be located at respectively the first temperature element, the second temperature element on permanent high container and its bottom pressure guiding pipe metal wall, and temperature transmitter forms.
2. according to claims 1 described steam-water two-phase body flow and steam quality real-time measurement apparatus, it is characterized in that: the protruding side wall surface that described the second bend pipe top flows to back to intraductal working medium is offered the first pressure port and is utilized pressure guiding pipe to connect permanent high container, the protruding side wall surface that described the second bend pipe bottom flows to back to intraductal working medium is offered the second pressure port and is connected with the negative pressure chamber of the 3rd differential pressure transmitter by condensing coil, pressure guiding pipe, and the plemum of described the 3rd differential pressure transmitter is connected with the pressure guiding pipe of permanent high container bottom.
3. according to claims 1 described steam-water two-phase body flow and steam quality real-time measurement apparatus, it is characterized in that: the first malleation pressure tappings and the first negative pressure pressure tappings are offered respectively in the outer rim of described the first bend pipe and inner edge corresponding section, described the first malleation pressure tappings is connected with the plemum of the first differential pressure transmitter by pressure guiding pipe after connecting the first drainer, and described the first negative pressure pressure tappings is connected with the negative pressure chamber of the first differential pressure transmitter by pressure guiding pipe after connecting the second drainer.
4. according to claims 1 described steam-water two-phase body flow and steam quality real-time measurement apparatus, it is characterized in that: the second malleation pressure tappings and the second negative pressure pressure tappings are offered respectively in the outer rim of described the 3rd bend pipe and inner edge corresponding section, be connected with the plemum of the second differential pressure transmitter by pressure guiding pipe after described the second malleation pressure tappings connects the 3rd drainer, be connected with the negative pressure chamber of the second differential pressure transmitter by pressure guiding pipe after described the second negative pressure pressure tappings connects the 4th drainer.
5. according to claims 1 described steam-water two-phase body flow and steam quality real-time measurement apparatus, it is characterized in that: described signal converter part, by the current/voltage converter be connected with the pressure unit output terminal with first, second and third differential pressure transmitter respectively, sends to the analog to digital converter of industrial computer signal processing system to form the switching signal of temperature transmitter and current/voltage converter.
6. according to claims 3 described steam-water two-phase body flow and steam quality real-time measurement apparatus, it is characterized in that: the described first positive and negative pressure tappings is located at respectively described the first vertical plane, bend pipe place along upper left--and lower right is to surface level, becoming counterclockwise outer rim and the inner edge position at 135 ° of angles.
7. according to claims 4 described steam-water two-phase body flow and steam quality real-time measurement apparatus, it is characterized in that: described the second positive and negative pressure pressure tappings is located at described the 3rd vertical plane, bend pipe place along upper right-lower left to the outer rim with the counterclockwise angle at 45 ° of surface level and inner edge position.
8. the measuring method of a steam-water two-phase body flow as claimed in claim 1 and steam quality real-time measurement apparatus, its measuring process is as follows:
The first step, the first and the 3rd bend pipe that form to measure pipeline section is respectively as the differential pressure flow sensor of elbowmeter, when fluid is flowed through this sensor, flow section does not change, the flow velocity of intraductal working medium is converted to differential pressure, the first and the 3rd bend pipe output differential pressure is measured by the first differential pressure transmitter and the second differential pressure transmitter respectively, and the arithmetic mean value of above-mentioned two differential pressures characterizes measures steam-water two-phase body mean flow rate in pipeline section;
Second step, the protruding upper lateral part that the second bend pipe be connected with the first bend pipe as entrance flows to back to working medium, the first pressure port and the second pressure port are offered respectively in bottom, the first pressure port is received working medium the plemum of the 3rd differential pressure transmitter by the high container of perseverance by pressure guiding pipe, the second pressure port is received working medium the negative pressure chamber of the 3rd differential pressure transmitter by condensing coil by pressure guiding pipe, first, the second temperature element and temperature transmitter record permanent high container and neutralize the condensate temperature in its bottom pressure guiding pipe, pressure unit records the power pressure in process pipe, obtain thus condensate water density in permanent high container and bottom pressure guiding pipe thereof, the height of permanent high container is steady state value, thereby determine permanent high container output static pressure, the 3rd differential pressure transmitter has been measured static pressure poor of steam-water two-phase body formation on static pressure that condensate water post in permanent high container forms and the second bend pipe elevation, under the prerequisite of measuring carbonated drink two-phase working medium mean flow rate, tried to achieve the apparent density of measuring the pipeline section inner fluid by this differential pressure,
The 3rd step, try to achieve volume mass dryness fraction and the steam-water two-phase weight flow of tube fluid, the volume mass dryness fraction is demarcated through the chemical examination mass dryness fraction, can indicate in real time outlet of steam boiler working medium quality mass dryness fraction under different load, thereby realize the saturated vapor saturation water two-phase fluid steam quality of outlet of steam boiler and the real-time measurement of mass rate.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103674147A (en) * | 2013-12-20 | 2014-03-26 | 中国计量学院 | On-line measuring device and method for double-flowmeter crude oil water content |
| CN108844592A (en) * | 2018-04-11 | 2018-11-20 | 西安交通大学 | A kind of condensed fluid collection measuring device and method based on pressure difference measuring signal |
| CN110108331A (en) * | 2019-05-23 | 2019-08-09 | 西安电子科技大学 | Homogeneity gas-liquid mixed two-phase flow test method and system based on ERT |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10206412A (en) * | 1997-01-16 | 1998-08-07 | Okuaizu Chinetsu Kk | Apparatus and method for measuring dryness and flow rate of steam/hot water two-phase flow |
| CN1259658A (en) * | 1999-12-29 | 2000-07-12 | 西安交通大学 | Measuring method of vapour liquid two phase flow and its measuring equipment |
| CN101038188A (en) * | 2007-01-31 | 2007-09-19 | 长春锅炉仪表程控设备股份有限公司 | Combined device for measuring wet steam flow and dryness and measuring method thereof |
| CN101556234A (en) * | 2009-04-30 | 2009-10-14 | 浙江大学 | Gas-water two phase flow multiparameter measuring method and device |
| CN201327400Y (en) * | 2008-11-21 | 2009-10-14 | 天津瑞吉德科技有限公司 | Wet steam flowmeter with two-phase flow |
| CN203414126U (en) * | 2013-09-11 | 2014-01-29 | 盘锦辽河油田辽南集团有限公司 | Real-time measurement device for flow of steam-water two-phase fluid and steam dryness |
-
2013
- 2013-09-11 CN CN201310411831.3A patent/CN103453962B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10206412A (en) * | 1997-01-16 | 1998-08-07 | Okuaizu Chinetsu Kk | Apparatus and method for measuring dryness and flow rate of steam/hot water two-phase flow |
| CN1259658A (en) * | 1999-12-29 | 2000-07-12 | 西安交通大学 | Measuring method of vapour liquid two phase flow and its measuring equipment |
| CN101038188A (en) * | 2007-01-31 | 2007-09-19 | 长春锅炉仪表程控设备股份有限公司 | Combined device for measuring wet steam flow and dryness and measuring method thereof |
| CN201327400Y (en) * | 2008-11-21 | 2009-10-14 | 天津瑞吉德科技有限公司 | Wet steam flowmeter with two-phase flow |
| CN101556234A (en) * | 2009-04-30 | 2009-10-14 | 浙江大学 | Gas-water two phase flow multiparameter measuring method and device |
| CN203414126U (en) * | 2013-09-11 | 2014-01-29 | 盘锦辽河油田辽南集团有限公司 | Real-time measurement device for flow of steam-water two-phase fluid and steam dryness |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103674147A (en) * | 2013-12-20 | 2014-03-26 | 中国计量学院 | On-line measuring device and method for double-flowmeter crude oil water content |
| CN108844592A (en) * | 2018-04-11 | 2018-11-20 | 西安交通大学 | A kind of condensed fluid collection measuring device and method based on pressure difference measuring signal |
| CN110108331A (en) * | 2019-05-23 | 2019-08-09 | 西安电子科技大学 | Homogeneity gas-liquid mixed two-phase flow test method and system based on ERT |
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