CN105372099A - Sampler and method for measuring multi-phase-flow phase holdup distribution - Google Patents
Sampler and method for measuring multi-phase-flow phase holdup distribution Download PDFInfo
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- CN105372099A CN105372099A CN201510931458.3A CN201510931458A CN105372099A CN 105372099 A CN105372099 A CN 105372099A CN 201510931458 A CN201510931458 A CN 201510931458A CN 105372099 A CN105372099 A CN 105372099A
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- stopple coupon
- sampler
- adjustment sheet
- end stopple
- pipe
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/20—Devices for withdrawing samples in the liquid or fluent state for flowing or falling materials
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- Hydrology & Water Resources (AREA)
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
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- Sampling And Sample Adjustment (AREA)
Abstract
The invention provides a sampler and method for measuring multi-phase-flow phase holdup distribution. The sampler comprises a front end sampling pipe, a connecting pipe capable of conducting free steering, a rear end sampling pipe, and an adjustor for adjusting the direction of a pipe opening of the front end sampling pipe. The front end sampling pipe is connected with the rear end sampling pipe through the connecting pipe. The adjustor comprises an adjusting rod and an adjusting piece installed at one end of the adjusting rod. The other end of the adjusting rod is connected with the front end sampling pipe. When the adjusting piece bears unbalanced force in the multi-phase-flow fluid, the adjusting piece drives the front end sampling pipe to rotate through the adjusting rod under the effect of unbalanced force till the adjusting piece bears balanced force; at the moment, the pipe opening of the front end sampling pipe just faces the multi-phase-flow incoming direction. By means of the sampler, the self-adaption can be achieved in the flowing direction of fluid at the measurement point, the flowing direction of fluid at the sampling point can be automatically sensed, the pipe opening can be automatically adjusted to just face the incoming direction, and therefore the sampling and measuring accuracy is improved.
Description
Technical field
The invention belongs to physical measuring device technical field, particularly relate to a kind of sampler and the method for measuring the distribution of polyphasic flow phase content.
Background technology
In industrial multiphase chemical reactor, often there is the processes such as the flowing of different phase, mixing, dispersion, transfer reaction.Dispersion particle (bubble, drop or solid particle) CONCENTRATION DISTRIBUTION be reflection inside reactor characteristic the most directly, one of the most effective parameter, be the important evidence of heterophase reactor analysis, type selecting and Design enlargement.
Mensuration at present to bubble, drop and solid particulate distributions in polyphasic flow, the most frequently used means are optical fiber probe method based on light reflection and conductance (electric capacity) sonde method based on conductance, and said method obtains a lot of successful Application in the measurement of gas-liquid and liquid-solid two-phase system.But when to there is multiple disperse phase simultaneously, such as, there is the disperse phase of bubble and solid particle two kinds of high phase contents in gas liquid particle three phase system, particularly often phase content is higher for industrial system, during actual measurement bubble " squeeze " with the sampled signal of solid particle together be difficult to differentiate, thus have a strong impact on the accuracy of measurement result.In addition, also have ultrasonic tomogram imaging, gamma ray fault imaging, electron tomography imaging technique etc., their maximum advantages are Noninvasives, but expensive and space-time resolution factor still needs to improve.Sampling method is the more original and traditional detection method of heterogeneous system, because it is simple, directly and result is comparatively reliable and be applied widely in Local effect modificat8 detects.The key of sampling method be isokinetic sampling or etc. momentum sampling (isokineticsampling), the flow condition namely inside and outside stopple coupon is identical.Accomplishing isokinetic sampling, first needing sample tap just to carrying out flow path direction, if depart to come flow path direction, there will be larger error.So-called " the tangential sampling method " that adopt at present is extensively only applicable to better simplyly can prejudge the flowing roughly flowed to, and often complex flow in heterophase reactor, the flow direction of sampling spot cannot be predicted, therefore can have a strong impact on the accuracy of sampling result.
Summary of the invention
For the deficiencies in the prior art, the object of the present invention is to provide a kind of sampler and the method for measuring the distribution of polyphasic flow phase content, described sampler can automatic sensing sampling spot fluid flow direction, and the adjustment mouth of pipe towards to just to incoming flow, thus improves the accuracy of sampling and measuring automatically.
For reaching this object, the present invention by the following technical solutions:
An object of the present invention is to provide a kind of sampler measuring the distribution of polyphasic flow phase content, described sampler comprises front end stopple coupon, the connecting pipe that can freely turn to, rear end stopple coupon and for regulating the regulator in stopple coupon mouth of pipe direction, front end, described front end stopple coupon is connected with rear end stopple coupon by connecting pipe, described regulator comprises adjuster bar and is arranged on the adjustment sheet of adjuster bar one end, and the other end of described adjuster bar is connected with front end stopple coupon; When in the fluid of described adjustment sheet at polyphasic flow by force unbalance time, described adjustment sheet drives front end stopple coupon to rotate by adjuster bar under the effect of out-of-balance force, until adjustment sheet stress balance, now the mouth of pipe of front end stopple coupon just carrys out flow path direction to polyphasic flow.
Described connecting pipe comprises flexible pipe and spring, and the internal diameter of described spring is greater than the external diameter of flexible pipe, and described spring is placed on flexible pipe outside.
Preferably, the material of described flexible pipe is rubber.
The number of described adjustment sheet is the multiple of 4, and is not 0, and the spacing between described adjustment sheet is identical.
Preferably, the adjustment sheet shape be arranged on described on adjuster bar is identical.
Preferably, the material of described adjuster bar is metal or organic glass.
The shape of described adjustment sheet is triangle or trapezoidal.
Described adjustment sheet is being just 0.8-1.2 to the ratio of the long edge lengths of incoming flow and the internal diameter size of front end stopple coupon.
Described front end stopple coupon and rear end stopple coupon are cylindrical tube.
Preferably, the material of described front end stopple coupon and rear end stopple coupon is metal or organic glass.
The length-diameter ratio of described cylindrical forward stopple coupon is 1-2.
Described front end stopple coupon is identical with the internal diameter of rear end stopple coupon.
Angle between described front end stopple coupon and rear end stopple coupon is 60-120 °.
Two of object of the present invention is to provide a kind of method utilizing sampler as above to measure the distribution of polyphasic flow phase content, described measuring method is: the front end stopple coupon of sampler and regulator are put into polyphasic flow reactor, and be dipped in below polyphasic flow liquid level, keep rear end stopple coupon vertical, when front end stopple coupon no longer rotates, sampling, measures phase content.
Compared with prior art, beneficial effect of the present invention is:
The sampler of measurement polyphasic flow phase content provided by the invention, can realize self-adaptation to the flow direction of measurement point fluid, automatic sensing sampling spot fluid flow direction, and automatically adjusts the mouth of pipe towards extremely just to incoming flow, thus improves the accuracy of sampling and measuring.
The method that utilization provided by the invention sampler as above measures the distribution of polyphasic flow phase content is simple, easy to operate.
Accompanying drawing explanation
Fig. 1 is the structural representation of the sampler of the measurement polyphasic flow phase content distribution that embodiment 1 provides.
Wherein: 1, front end stopple coupon; 2, adjustment sheet; 3, spring; 4, flexible pipe; 5, rear end stopple coupon; 6, adjuster bar.
Fig. 2 is the liquid-solid tank diameter interior local solid holdup distribution that embodiment 2 obtains.
Wherein: a is PC-6a solid concentration measuring instrument measurement result; B is common stopple coupon measurement result (mouth of pipe level); C is sampler measurement result described in embodiment 1.
Fig. 3 be embodiment 3 obtain gas-liquid agitation groove in gas holdup distribution.
Wherein: a is conducting probe measurement result; B is common stopple coupon measurement result (mouth of pipe level); C is sampler measurement result described in embodiment 1.
Fig. 4 be embodiment 4 obtain gas-liquid-solid tank diameter in solid holdup distribution plan.
Fig. 5 be embodiment 4 obtain gas-liquid-solid tank diameter in gas holdup distribution plan.
Embodiment
Technical scheme of the present invention is further illustrated by embodiment below in conjunction with accompanying drawing.
A kind of sampler measuring the distribution of polyphasic flow phase content, described sampler comprises front end stopple coupon 1, the connecting pipe that can freely turn to, rear end stopple coupon 5 and for regulating the regulator in front end stopple coupon 1 mouth of pipe direction, described front end stopple coupon 1 is connected with rear end stopple coupon 5 by connecting pipe, described regulator comprises adjuster bar 6 and is arranged on the adjustment sheet 2 of adjuster bar 6 one end, and the other end of described adjuster bar 6 is connected with front end stopple coupon 1; When in the fluid of described adjustment sheet 2 at polyphasic flow by force unbalance time, described adjustment sheet 2 drives front end stopple coupon 1 to rotate by adjuster bar 6 under the effect of out-of-balance force, until adjustment sheet 2 stress balance, now the mouth of pipe of front end stopple coupon 1 just carrys out flow path direction to polyphasic flow.
Sampler provided by the invention, when fluid to during with front end stopple coupon 1 one-tenth a certain angle of cut, the adjustment sheet 2 of fluid to regulator produces pressure, because the pressure experienced everywhere of adjustment sheet 2 is unequal, pressure perpendicular to adjustment sheet 2 produces pressure square, and front end stopple coupon 1 is rotated, until the mouth of pipe of front end stopple coupon 1 just in time facing to fluid come to, due to adjustment sheet 2 all directions stress balance, front end stopple coupon 1 is just stabilized in this orientation.
Described connecting pipe comprises flexible pipe 4 and spring 3, and the internal diameter of described spring 3 is greater than the external diameter of flexible pipe 4, and it is outside that described spring 3 is placed on flexible pipe 4.Described connecting pipe can rotate according to the rotation of front end stopple coupon 1.
Preferably, the material of described flexible pipe 4 is rubber.
The number of described adjustment sheet 2 is multiples of 4, and is not 0, and the number as adjustment sheet 2 is 8,12,14 or 20 etc., and the spacing between described adjustment sheet 2 is identical.
Preferably, the adjustment sheet shape be arranged on described on adjuster bar is identical.
Preferably, the material of described adjuster bar 6 is metal or organic glass.
The shape of described adjustment sheet 2 is triangle or trapezoidal.
Described adjustment sheet 2 is being just 0.8-1.2 to the ratio of the length on the long limit of incoming flow and the internal diameter size of front end stopple coupon 1, as 0.9,1.0,1.1 or 1.2 etc.
Described front end stopple coupon 1 and rear end stopple coupon 5 are cylindrical tube.
Preferably, the material of described front end stopple coupon 1 and rear end stopple coupon 5 is metal or organic glass.
The length-diameter ratio of described cylindrical forward stopple coupon 1 is 1-2, as 1.1,1.2,1.3,1.5,1.8 or 1.9 etc.
Described front end stopple coupon 1 is identical with the internal diameter of rear end stopple coupon 5.
Angle between described front end stopple coupon 1 and rear end stopple coupon 5 is 60-120 °, as 65 °, 70 °, 75 °, 80 °, 85 °, 90 °, 100 °, 105 ° or 115 ° etc.
Sampler as above is utilized to measure the method for polyphasic flow phase content distribution, described measuring method is: the front end stopple coupon 1 of sampler and regulator are put into polyphasic flow reactor, and be dipped in below polyphasic flow liquid level, keep rear end stopple coupon 5 vertical, when front end stopple coupon 1 no longer rotates, sampling, measures phase content.
Embodiment 1
Measure a sampler for polyphasic flow phase content distribution, as shown in Figure 1.Described sampler comprises front end stopple coupon 1, the connecting pipe that can freely turn to, rear end stopple coupon 5 and for regulating the regulator in front end stopple coupon 1 mouth of pipe direction, described front end stopple coupon 1 is connected with rear end stopple coupon 5 by connecting pipe, described regulator comprises adjuster bar 6 and is arranged on the adjustment sheet 2 of adjuster bar 6 one end, the other end of described adjuster bar 6 is connected with front end stopple coupon 1, the number of described adjustment sheet 2 is four, spacing between adjustment sheet 2 is identical, the shape of described adjustment sheet 2 is trapezoidal, described trapezoidal be just two parallel edges to the limit of incoming flow.
The front end stopple coupon 1 of described sampler is plexi-glass tubular material, and its internal diameter is 6mm, and wall thickness is 1mm, and length of tube is 16mm; The long 8mm of described adjuster bar 6; Connecting pipe comprises rubber hose 4 and stainless steel spring 3, and the internal diameter of rubber hose 4 is 6mm, and wall thickness is 1mm, internal diameter 9mm, and connecting pipe length is 10mm; Rear end stopple coupon 5 is internal diameters is 6mm, wall thickness is the stainless-steel tube of 1mm, and the pipe range of rear end stopple coupon 5 is 300mm.
Adopt peristaltic pump to control sample rate, solid holdup adopts pycnometer method to obtain solid masses number percent, and gas holdup is then direct reads volume containing rate from sampling jar scale.
Embodiment 2
The sampler described in embodiment 1 is utilized to measure local solid phase content in liquid-solid stirred tank reactor.
Experiment carries out in the organic glass tank diameter of diameter T=380mm, and experimental system is silica sand (200 order) and deionized water, and average solid holdup is 5wt% (mass ratio), standby fluid level height H=T, liquidus temperature 22 DEG C, paddle is 45 ° of down-push type six hinged joint open turbine oars, oar diameter D=T/3, and oar is from end height C=T/3, and at the bottom of elliptical slot, the ratio of major axis and minor axis is 2:1, with tank diameter oval end center minimum point for true origin, adopt the sampler described in embodiment 1, measure (r/R, z/H)=(0.8, 0.34) solid holdup on position, wherein, r/R and z/H represents with tank diameter bottom centre respectively for initial point, radial and axial position, R is the radius bottom tank diameter, r is the distance of place, sample position place to tank diameter axis, z is the liquid level at place, sample position place, and compare with traditional sampler measurement result of solid concentration measuring instrument PC-6a and sampling nozzle horizontal positioned, result as shown in Figure 2, sampler of the present invention obtains the measurement result closer to PC-6a.
Embodiment 3
Utilize the local gas phase content in the sampler mensuration gas-liquid agitation groove reactor described in embodiment 1.
Experiment carries out in the flat organic glass tank diameter of diameter T=380mm, and experimental system is air and deionized water; Standby fluid level height H=T, liquidus temperature 22 DEG C; Paddle is standard Rushton oar, oar diameter D=T/3, and oar is from end height C=T/3; With tank diameter oval end center minimum point for true origin, the sampler described in embodiment 1 is adopted to measure (r/R in gas-liquid agitation groove, z/H)=(0.8,0.34) gas holdup on position, and compare with traditional sampler measurement result of conducting probe and sampling nozzle horizontal positioned, as shown in Figure 3, sampler of the present invention all obtains the measurement result closer to conducting probe to result.
Embodiment 4
Utilize the local gas phase in the sampler mensuration gas-liquid-solid stirred tank reactor described in embodiment 1 and solid phase content.
Experiment carries out in the organic glass tank diameter of diameter T=380mm, and experimental system is air, silica sand (200 order) and deionized water, and average solid holdup is 5wt% (mass ratio); Standby fluid level height H=T, liquidus temperature 22 DEG C; Paddle is 45 ° of down-push type six hinged joint open turbine oars, oar diameter D=T/3, and oar is from end height C=T/3, and at the bottom of elliptical slot, the ratio of major axis and minor axis is 2:1; With tank diameter oval end center minimum point for true origin, adopt the sampler described in embodiment 1, measure solid holdup and gas holdup distribution radially on 4 axial heights respectively, result as shown in Figures 4 and 5, as can be seen from the figure, adopt this sampler successfully to measure gas holdup in three-phase stirring groove and solid holdup distribution, measurement result conforms to the qualitative understanding of gas-liquid-solid tank diameter.
Applicant states; the foregoing is only the specific embodiment of the present invention; but protection scope of the present invention is not limited thereto; person of ordinary skill in the field should understand; anyly belong to those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all drop within protection scope of the present invention and open scope.
Claims (10)
1. measure the sampler of polyphasic flow phase content distribution for one kind, it is characterized in that, described sampler comprises front end stopple coupon (1), the connecting pipe that can freely turn to, rear end stopple coupon (5) and for regulating the regulator in front end stopple coupon (1) mouth of pipe direction, described front end stopple coupon (1) is connected with rear end stopple coupon (5) by connecting pipe, described regulator comprises adjuster bar (6) and is arranged on the adjustment sheet (2) of adjuster bar (6) one end, and the other end of described adjuster bar (6) is connected with front end stopple coupon (1); When in the fluid of described adjustment sheet (2) at polyphasic flow by force unbalance time, described adjustment sheet (2) drives front end stopple coupon (1) to rotate by adjuster bar (6) under the effect of out-of-balance force, until adjustment sheet (2) stress balance, now the mouth of pipe of front end stopple coupon (1) just carrys out flow path direction to polyphasic flow.
2. sampler according to claim 1, it is characterized in that, described connecting pipe comprises flexible pipe (4) and spring (3), the internal diameter of described spring (3) is greater than the external diameter of flexible pipe (4), and it is outside that described spring (3) is placed on flexible pipe (4);
Preferably, the material of described flexible pipe (4) is rubber.
3. sampler according to claim 1 and 2, is characterized in that, the number of described adjustment sheet (2) is the multiple of 4, and is not 0, and the spacing between described adjustment sheet (2) is identical;
Preferably, adjustment sheet (2) shape be arranged on described on adjuster bar (6) is identical;
Preferably, the material of described adjuster bar (6) is metal or organic glass.
4. according to the sampler one of claim 1-3 Suo Shu, it is characterized in that, the shape of described adjustment sheet (2) is triangle or trapezoidal.
5. according to the sampler one of claim 1-4 Suo Shu, it is characterized in that, described adjustment sheet (2) is being just 0.8-1.2 to the ratio of the long edge lengths of incoming flow and the internal diameter size of front end stopple coupon (1).
6. according to the sampler one of claim 1-5 Suo Shu, it is characterized in that, described front end stopple coupon (1) and rear end stopple coupon (5) are cylindrical tube;
Preferably, the material of described front end stopple coupon (1) and rear end stopple coupon (5) is metal or organic glass.
7. sampler according to claim 6, is characterized in that, the length-diameter ratio of described cylindrical forward stopple coupon (1) is 1-2.
8. according to the sampler one of claim 1-7 Suo Shu, it is characterized in that, described front end stopple coupon (1) is identical with the internal diameter of rear end stopple coupon (5).
9. according to the sampler one of claim 1-8 Suo Shu, it is characterized in that, the angle between described front end stopple coupon (1) and rear end stopple coupon (5) is 60-120 °.
10. the sampler utilizing one of claim 1-9 described measures the method for polyphasic flow phase content distribution, it is characterized in that, described measuring method is: the front end stopple coupon (1) of sampler and regulator are put into polyphasic flow reactor, and be dipped in determinand, keep rear end stopple coupon (5) vertical, when front end stopple coupon (1) no longer rotates, sampling, measures phase content distribution.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510931458.3A CN105372099B (en) | 2015-12-15 | 2015-12-15 | A kind of sampler and method measuring the distribution of multiphase flow containing rate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510931458.3A CN105372099B (en) | 2015-12-15 | 2015-12-15 | A kind of sampler and method measuring the distribution of multiphase flow containing rate |
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| CN105372099A true CN105372099A (en) | 2016-03-02 |
| CN105372099B CN105372099B (en) | 2018-09-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112461605A (en) * | 2020-09-27 | 2021-03-09 | 山东大学 | Universal time sequence vector submarine sediment catcher and catching method |
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| US20140260694A1 (en) * | 2013-03-15 | 2014-09-18 | Chevron U.S.A. Inc. | Automated Tracer Sampling and Measurement System |
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| US5154087A (en) * | 1990-01-29 | 1992-10-13 | Intersystems, Inc. | Sampler apparatus |
| CN2087338U (en) * | 1991-04-05 | 1991-10-23 | 荀建国 | Static-pressure-balance constant-speed smoke-sampling tube |
| CN201615848U (en) * | 2010-02-09 | 2010-10-27 | 中国气象局乌鲁木齐沙漠气象研究所 | Full-automatic and high-precision sand-dust collector |
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| CN112461605A (en) * | 2020-09-27 | 2021-03-09 | 山东大学 | Universal time sequence vector submarine sediment catcher and catching method |
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