CN102297819A - On-line measuring meter for density of solid-liquid two-phase fluid and measuring method thereof - Google Patents
On-line measuring meter for density of solid-liquid two-phase fluid and measuring method thereof Download PDFInfo
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- CN102297819A CN102297819A CN2010102051993A CN201010205199A CN102297819A CN 102297819 A CN102297819 A CN 102297819A CN 2010102051993 A CN2010102051993 A CN 2010102051993A CN 201010205199 A CN201010205199 A CN 201010205199A CN 102297819 A CN102297819 A CN 102297819A
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Abstract
The invention discloses an on-line measuring meter for density of solid-liquid two-phase fluid and a measuring method thereof. The on-line measuring meter comprises a measuring jar and a draft tube, wherein the draft tube is placed in the measuring jar and a floater lifter which floats up and down following the change of the density of the fluid in the measuring jar is arranged in the draft tube. The measuring method comprises the following steps: introducing the solid-liquid two-phase fluid with a density to be measured into the measuring jar; soaking a ball in serous fluid; and accurately measuring the density of the serous fluid by detecting a floating value of a lifting rod, because the mass of the floater lifter is fixed and the soaking depth of the lifting rod of the floater lifter is changed when the density of the serous fluid is changed. The on-line measuring meter provided by the invention has the advantages of simple structure, convenience in operation, strong anti-interference, high measuring accuracy, safety and practicability.
Description
Technical field
The present invention relates to a kind of Density Detection field, relate in particular to a kind of two-phase solid-liquid fluid density on-line measurement instrument and measuring method thereof.
Background technology
Two-phase solid-liquid fluid (slurries) measuring density uses very general in commercial production, use more in the lime stone that developed rapidly in recent years-gypsum wet flue gas desulfurizing engineering, measurement data is the foundation that industrial processes are regulated, and two-phase solid-liquid fluid density measure correctness seems particularly important.In lime stone-gypsum wet flue gas desulfurizing engineering, according to reactant metering in the absorption tower with generate the gypsum quality requirements, enter that gypsum slurries density value and desulfuration efficiency have direct relation in the lime stone slurry density on absorption tower and the absorption tower.Gypsum slurries densitometer in the slurries extraction pump outlet conduit of absorption tower is being controlled the quality of gypsum in the absorption tower, when concentration of slurry is lower than certain certain value, need send absorption tower recycle back to, if concentration is higher than certain certain value, then delivers to the one-level dehydration or mends filtrate water.So two densitometers that use in the system are indispensable crucial checkout equipments in lime stone-gypsum wet desulfurization control system, necessary long-term online use and requirement are measured accurately.Because the abrasiveness of desulphurization system lime stone slurry and gypsum slurries makes densitometric selection have bigger difficulty.
When measuring serum density, the most frequently used instrument is a gamma-rays radiation absorption measuring instrument.This measuring instrument is installed in the outside of the slurries conveying or the shape conveyance conduit that looses, and belongs to untouchable continuous coverage.Yet there is following shortcoming in this gamma-rays radiation absorption measuring instrument: radioactivity is bigger to personal injury, needs strict protective device and handles the radioactivity usage license; In addition, this method can not be distinguished suspended solid and dissolved solid.
Another kind of density measure is to use reed vibrates formula instrument (Ke Liao), and the principle of reed vibrates formula instrument is by the vibration of concentration of slurry variable effect to motor coil, by electronic circuit this vibration is converted into density measurement.Yet this measuring instrument is vulnerable to the interference of piping vibration, and its contact probe (reed) is vulnerable to washing away of slurries and corrode, and serviceable life is short, and performance is unreliable, therefore few employing.
The third penetron is a mass flowmeter, its density measure principle is: measuring tube vibrates with certain resonant frequency continuously, vibration frequency changes with the variable density of fluid, therefore resonant frequency is the function of fluid density, can get corresponding density output signal thus, its precision can reach 0.002g/cc.Its shortcoming is a contact type measurement, and slurries have wearing and tearing to measuring tube, influences measuring accuracy; Its generating means is the very little corrugated tube of latus rectum, owing to be with solid particle in lime stone slurry and the gypsum slurries fluid, corrugated tube stops up easily, fluctuation of service.
Summary of the invention
Radioactive contamination at existing serosity density measurement technology gamma-rays radiation absorption measuring instrument existence, reed is subject to vibration interference and causes measuring inaccurate during reed vibrates formula instrument measurement, mass flow meter measurement wearing and tearing and seriously corroded, stop up easily, change defectives such as frequent, the quality of utilization levitated object in slurries should equal the principle that it arranges the slurries quality, the present invention aims to provide a kind of two-phase solid-liquid fluid (slurries) density on-line measurement instrument, this measuring instrument is simple in structure, easy and simple to handle, anti-interference strong, measuring accuracy height, safe and applicable.
To achieve these goals, the technical solution adopted in the present invention is: described two-phase solid-liquid fluid density on-line measurement instrument, its design feature is, comprise and measure jar, place and measure a jar interior guide shell, in described guide shell, be provided with one with measuring the ball float lifter that the pot liquid variable density fluctuates.
Further, the structure of described ball float lifter is, is provided with a ball float in guide shell, and this ball float top is connected with an elevating lever, and the other end of elevating lever and is contained in the range finding reflector plate of measuring in jar elevating lever guide cylinder of upper end and links to each other; Described elevating lever guide cylinder top is provided with the stadimeter that can measure range finding reflector plate displacement.
In addition, described measurement jar and guide shell concentric have a plurality of slurry hole on the described guide shell wall.
Described measurement jar lower end one side is provided with tangential slurries inlet and inlet valve, measures pot bottom one side and establishes leakage fluid dram and underflow valve, measures tank top one side and is provided with overflow vent, measures the tank top and is provided with the cleansing solution inlet.
Discharge receiver and discharge return port are equipped with in the described overflow vent below of measuring jar.
Described measurement jar, guide shell, elevating lever guide cylinder and elevating lever all adopt wear-resisting, corrosion resistant titanium alloy or high nickelio alloy or two-way stainless steel manufacturing.
By the two-phase solid-liquid fluid (slurries) of density to be measured is introduced in the measurement jar, in measuring jar, place a ball float lifter of forming by ball float, an elevating lever and the reflector plate of finding range, ball float is immersed in the slurries, and elevating lever exposes to outside the slurries.Because ball float lifter quality is certain, when serum density changes, the elevating lever submersible depth will change, and can correspondence record serum density value accurately by the value that detects the elevating lever rising, descend.
Further purpose of the present invention aims to provide a kind of method of utilizing above-mentioned measuring instrument on-line measurement solid-liquid two-phase flow volume density, comprises the steps:
At first, two-phase solid-liquid fluid is entered the measurement jar from the slurries inlet, wherein the ball float radius is r, and the guide pole diameter is d, utilizes stadimeter to record two-phase solid-liquid fluid liquid level to the reflector plate distance of finding range and is H
1, the ball float top is H to the reflector plate distance of finding range, the quality of ball float, guide pole and range finding reflector plate and be M;
After the solid-liquid two-phase flow volume density changes, utilize stadimeter to record ball float, guide pole and range finding reflector plate and moved H together
2
Equal the principle that it arranges the slurries quality according to suspension quality in the slurries, by 1/ ρ={ 4/3 π * r
3+ 1/4 π * d
2* (H-H
1)/M-1/4 π * d
2/ M * H
2, can draw the density p that changes back two-phase solid-liquid fluid to be measured;
After measurement finishes, open the underflow valve, inject cleansing solution from the cleansing solution inlet then, clean and measure jar.
Description of drawings
Fig. 1 is the structure principle chart of an embodiment of the present invention.
In the drawings:
1-measures jar; The 2-inlet valve; The 3-ball float;
The 4-elevating lever; The 5-reflector plate of finding range; 6-elevating lever guide cylinder;
The 7-stadimeter; The 8-overflow vent; 9-discharge receiver;
10-discharge return port; 11-underflow valve; The 12-guide shell;
The 13-flange.
Specific embodiments
Below introduce the present invention in detail by specific embodiments:
A kind of two-phase solid-liquid fluid density on-line measurement instrument as shown in Figure 1, comprises and measures jar 1, places the guide shell of measuring in the jar 1 12, is provided with one with measuring the ball float lifter that liquid density variation fluctuates in the jar 1 in described guide shell 12.
Further, the structure of described ball float lifter is, in guide shell 12, be provided with a ball float 3, these ball float 3 tops are connected with an elevating lever 4, the range finding reflector plate 5 that the other end of elevating lever 4 and is contained in the elevating lever guide cylinder 6 of measuring jar 1 upper end links to each other, and these elevating lever guide cylinder 6 tops are provided with the stadimeter 7 that can measure range finding reflector plate 5 displacements.
In addition, described measurement jar 1 and guide shell 12 concentrics have a plurality of slurry hole on described guide shell 12 walls.
Described measurement jar 1 lower end, one side is provided with tangential slurries inlet and inlet valve 2, measures jar 1 bottom, one side and establishes leakage fluid dram and underflow valve 11, measures jar 1 top, one side and is provided with overflow vent 8, measures jar 1 top and is provided with the cleansing solution inlet.
Discharge receiver 9 and discharge return port 10 are equipped with in described overflow vent 8 belows of measuring jar 1.
Described measurement jar 1, guide shell 12, elevating lever guide cylinder 6 and elevating lever 4 all adopt wear-resisting, corrosion resistant titanium alloy or high nickelio alloy or two-way stainless steel manufacturing.
The slurries of measured density are tangentially entered measurement jar 1 from inlet valve 2, measure the guide shell 12 that jar 1 center has hollow out, ball float 3 is in guide shell 12, slurries flow outside guide shell 12 from bottom to top, can form convection current by slurries in slurry hole on the guide shell 12 and the guide shell 12 again, both prevented of the influence of eddy flow slurries, made slurries and guide shell 12 outer slurries convection current in the guide shell 12 again ball float 3.When the slurries face was higher than overflow vent 8, slurries were from overflow vent 8 outflows, thereby the maintenance slurries are in flow state, and slurries are kept from disturbance in measurement jar 1, and are even up and down, and liquid level is constant in the maintenance measurement jar 1.Ball float 3 is immersed in the slurries, the quality of ball float 3, elevating lever 4, range finding reflector plate 5 should equal the quality that ball float 3 and elevating lever 4 are immersed in the slurries that volume arranges in the slurries, when serum density changes, the length that elevating lever 4 is immersed in the liquid will change, because liquid level is constant, so elevating lever 4 will move up and down, the distance that moves is measured by stadimeter 7 and is changed electric signal into, utilizes this distance value that records can calculate corresponding fluid density value.
Describe with an instantiation below, selected ball float 3 radiuses are r=30mm, and the guide pole diameter is d=15mm, utilize stadimeter 7 to record two-phase solid-liquid fluid liquid level to reflector plate 5 distances of finding range and are H
1=50mm, ball float 3 tops are H=350mm to reflector plate 5 distance of finding range, the quality of ball float 3, guide pole 4 and range finding reflector plate 5 and be M=150g;
After the solid-liquid two-phase flow volume density changes, utilize stadimeter 7 to record ball float 3, guide pole 4 and range finding reflector plate 5 and moved H together
2
Equal the principle that it arranges the slurries quality according to suspension quality in the slurries, by 1/ ρ={ 4/3 π * r
3+ 1/4 π * d
2* (H-H
1)/M-1/4 π * d
2/ M * H
2, can draw the density p that changes the back two-phase solid-liquid fluid;
After measurement finishes, open the underflow valve, inject cleansing solution from the cleansing solution inlet then, clean and measure jar 1.
The H that specifically records
2Value and density p such as the following table calculated by formula:
| Sequence number | H 2Value mm | Fluid density g/l | Sequence number | H 2Value mm | Fluid density g/l |
| 1 | 0 | 963.7 | 17 | 160 | 1088.8 |
| 2 | 10 | 913.2 | 18 | 170 | 1102.9 |
| 3 | 20 | 923.1 | 19 | 180 | 1117.4 |
| 4 | 30 | 933.2 | 20 | 190 | 1132.3 |
| 5 | 40 | 943.6 | 21 | 200 | 1147.6 |
| 6 | 50 | 954.2 | 22 | 210 | 1163.4 |
| 7 | 60 | 965.1 | 23 | 220 | 1179.5 |
| 8 | 70 | 976.2 | 24 | 230 | 1196.1 |
| 9 | 80 | 987.5 | 25 | 240 | 1213.2 |
| 10 | 90 | 999.1 | 26 | 250 | 1230.8 |
| 11 | 100 | 1011.0 | 27 | 260 | 1248.9 |
| 12 | 110 | 1023.2 | 28 | 270 | 1267.5 |
| 13 | 120 | 1035.7 | 29 | 280 | 1286.8 |
| 14 | 130 | 1048.5 | 30 | 290 | 1306.5 |
| 15 | 140 | 1061.6 | 31 | 300 | 1327.0 |
| 16 | 150 | 1075.0 | ? | ? | ? |
From the table data as can be seen, along with H
2Data increase, the corresponding increase of corresponding density value.H
2Be worth every variation 10mm, density value changes 15g/l approximately.H
2Accuracy value generally can reach 1mm, and therefore, this densitometer theoretical precision can be up to 2g/l, and promptly about 0.2%.
Claims (7)
1. two-phase solid-liquid fluid density on-line measurement instrument, it is characterized in that, comprise and measure jar (1), place the guide shell of measuring in jar (1) (12), in described guide shell (12), be provided with one with measuring the ball float lifter that liquid density variation fluctuates in jar (1).
2. two-phase solid-liquid fluid density on-line measurement instrument according to claim 1, it is characterized in that, the structure of described ball float lifter is, in guide shell (12), be provided with a ball float (3), this ball float (3) top is connected with an elevating lever (4), and the other end and of elevating lever (4) is contained in the range finding reflector plate of measuring in jar elevating lever guide cylinder (6) of (1) upper end (5) and links to each other; Described elevating lever guide cylinder (6) top is provided with the stadimeter (7) that can measure range finding reflector plate (5) displacement.
3. two-phase solid-liquid fluid density on-line measurement instrument according to claim 1 and 2 is characterized in that, described measurement jar (1) and guide shell (12) concentric have a plurality of slurry hole on described guide shell (12) wall.
4. two-phase solid-liquid fluid density on-line measurement instrument according to claim 1 and 2, it is characterized in that, described measurement jar (1) lower end one side is provided with tangential slurries inlet and inlet valve (2), measure jar (1) bottom one side and establish leakage fluid dram and underflow valve (11), measure jar (1) top one side and be provided with overflow vent (8), measure jar (a 1) top and be provided with the cleansing solution inlet.
5. two-phase solid-liquid fluid density on-line measurement instrument according to claim 1 and 2 is characterized in that, discharge receiver (9) and discharge return port (10) are equipped with in described overflow vent (8) below of measuring jar (1).
6. two-phase solid-liquid fluid density on-line measurement instrument according to claim 1 and 2, it is characterized in that described measurement jar (1), guide shell (12), elevating lever guide cylinder (6) and elevating lever (4) all adopt wear-resisting, corrosion resistant titanium alloy or high nickelio alloy or two-way stainless steel manufacturing.
7. a method of utilizing the described measuring instrument on-line measurement of one of claim 1-6 solid-liquid two-phase flow volume density is characterized in that, comprises the steps:
At first, two-phase solid-liquid fluid is entered measurement jar (1) from the slurries inlet, wherein ball float (3) radius is r, and the guide pole diameter is d, utilizes stadimeter (7) to record two-phase solid-liquid fluid liquid level to the reflector plate of finding range (5) distance and is H
1, ball float (3) top is H to the reflector plate of finding range (5) distance, the quality of ball float (3), guide pole (4) and the reflector plate (5) of finding range and be M;
After the solid-liquid two-phase flow volume density changes, utilize stadimeter (7) to record ball float (3), guide pole (4) and range finding reflector plate (5) and moved H together
2
Equal the principle that it arranges the slurries quality according to suspension quality in the slurries, by 1/ ρ={ 4/3 π * r
3+ 1/4 π * d
2* (H-H
1)/M-1/4 π * d
2/ M * H
2, can draw the density p that changes back two-phase solid-liquid fluid to be measured;
After measurement finishes, open underflow valve (11), inject cleansing solution from the cleansing solution inlet then, clean and measure jar (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102051993A CN102297819A (en) | 2010-06-22 | 2010-06-22 | On-line measuring meter for density of solid-liquid two-phase fluid and measuring method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102051993A CN102297819A (en) | 2010-06-22 | 2010-06-22 | On-line measuring meter for density of solid-liquid two-phase fluid and measuring method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN102297819A true CN102297819A (en) | 2011-12-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112284969A (en) * | 2020-10-22 | 2021-01-29 | 东来涂料技术（上海）股份有限公司 | Method for measuring density of coating |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3619418A1 (en) * | 1986-06-10 | 1987-12-17 | Siemens Ag | Method and device for measuring the density of a liquid |
| CN2308092Y (en) * | 1997-07-31 | 1999-02-17 | 丰守身 | Determining meter for liquid density |
| CN200948413Y (en) * | 2006-07-07 | 2007-09-19 | 南京理工大学 | Cyclone film separator |
| CN201732044U (en) * | 2010-06-22 | 2011-02-02 | 湖南永清环保股份有限公司 | Density online measuring instrument of solid-liquid two-phase fluid |
-
2010
- 2010-06-22 CN CN2010102051993A patent/CN102297819A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3619418A1 (en) * | 1986-06-10 | 1987-12-17 | Siemens Ag | Method and device for measuring the density of a liquid |
| CN2308092Y (en) * | 1997-07-31 | 1999-02-17 | 丰守身 | Determining meter for liquid density |
| CN200948413Y (en) * | 2006-07-07 | 2007-09-19 | 南京理工大学 | Cyclone film separator |
| CN201732044U (en) * | 2010-06-22 | 2011-02-02 | 湖南永清环保股份有限公司 | Density online measuring instrument of solid-liquid two-phase fluid |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112284969A (en) * | 2020-10-22 | 2021-01-29 | 东来涂料技术（上海）股份有限公司 | Method for measuring density of coating |
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Application publication date: 20111228 |