CN102486445A - Bubble type slurry densimeter - Google Patents
Bubble type slurry densimeter Download PDFInfo
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- CN102486445A CN102486445A CN2010105719959A CN201010571995A CN102486445A CN 102486445 A CN102486445 A CN 102486445A CN 2010105719959 A CN2010105719959 A CN 2010105719959A CN 201010571995 A CN201010571995 A CN 201010571995A CN 102486445 A CN102486445 A CN 102486445A
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- wireway
- differential pressure
- flowmeter
- pressure pick
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Abstract
The invention provides a bubble type slurry densimeter which is used for continuous measurement of the proportion of a solution or a solid-liquid double-phase mixed slurry. According to the invention, two gas guide tubes are respectively inserted into the upper part and the lower part of a slurry storage tank or a vertical pipeline used for conveying slurry, vertical distance between gas outlets is known, air flow with a constant speed is allowed to enter into the two gas guide tubes, differential pressure in the two gas guide tubes is measured, and the concentration of slurry can be obtained through conversion of pressure difference; since a sensor and a medium to be detected do not contact directly, faults of measuring parts caused by corrosion, fouling and the like are avoided, and the service life an apparatus is prolonged. The densimeter provided in the invention has the advantages of a simple integral structure and low cost.
Description
Affiliated technical field
The present invention relates in a kind of continuous coverage container or pipeline in the aut.eq. of concentration of slurry.
Background technology
In process industry, adopt by the solution of solable matter preparation or mix the solid-liquid two that forms by solid fine particle and liquid mediums such as water or corrosive liquids, oil product slurries are common as the technological process ten minutes of raw materials for production or auxiliary material mutually.For rationally utilizing starting material, realizing energy-saving and emission-reduction, need measure and control solution or concentration of slurry.For example, in the technological process that adopts biochemical process to dispose of sewage, sludge concentration is important technology controlling and process index; In the smoke-gas wet desulfurization set of equipments, desulfurizer slurry preparation and conveying are important procedures wherein, and the control of desulfurizer slurry concentration is to ensureing that desulfuration efficiency plays decisive role; The coal slime concentration measurement directly influences productive capacity and operating cost with control in the coal floatation process; Or the like.Deposition is deposited, drawbacks such as dirt adheres to, chemical corrosion, line clogging because this type medium is easy to; Measurement of concetration instrument structure ten minutes complicacy and failure rate based on radioactive ray, optics, electromagnetics, the design of acoustics prior aries such as (ultrasound waves) are high; Cost an arm and a leg, thereby be difficult to popularize and promote.Therefore, be badly in need of seeking a kind of new technology principle of measuring concentration, in the hope of solving the engineering survey problem of extraordinary solution or concentration of slurry.
Summary of the invention
The present invention provides a kind of know-why of utilizing bubble method to measure liquid internal pressure to measure the aut.eq. of concentration of slurry.
Know-why of the present invention is based on utilizing bubble method to measure the law of physics of liquid internal pressure: the air-flow of constant flow rate is fed the wireway that injects in the liquid; Air-flow overcomes liquid resistance and discharges from wireway is terminal; Form the bubble liquid surface of overflowing continuously, the pressure P in this moment wireway is positioned at the following degree of depth h in liquid free face with the wireway end has following relation:
P＝hgρ+υR (1)
In the formula, the terminal degree of depth of inserting liquid of h-wireway, m; The g-constant; ρ-liquid severe or concentration, kg/m
3υ-gas velocity; The resistance of R-wireway.Second the υ R in formula (1) right side is the pressure loss in the pipeline, and be certain when wireway length, when gas velocity is constant, and pressure loss υ R can be considered constant C, thus:
P=Hg ρ+C, or
H＝P/gρ-C (2)
Formula (2) shows: when the severe of fluid to be measured medium was stable constant value, air guide intraductal pressure P was promptly corresponding to the degree of depth of tracheae end-to-end distance from liquid free surface, that is corresponding liquid level H.If the fluid to be measured medium is water, promptly proportion is 1, after deducting as instrument constant through unit conversion and with constant term g ρ and C, can directly represent water surface elevation H with the pressure P in the wireway.
Can measure the concentration of liquid medium based on this know-why: in the liquid in container medium, insert two wireways, the vertical range between two wireway gas outlets is known number L, and its occurrence is selected according to the variation range of fluid to be measured concentration of medium; Feed the air-flow that flow velocity equates simultaneously to two wireways, then the gas outlet below wireway in pressure be:
P
Down=Hg ρ+C
Pressure in the wireway up of gas outlet is:
P
On=(H-L) g ρ+C
Pressure reduction in two wireways:
Δ P=P
Down-P
On=Lg ρ (3)
Or
ρ＝ΔP/Lg (4)
Formula (4) shows, measures two wireway internal pressure difference Δ P and can obtain solution or concentration of slurry ρ.Given data Lg in the formula is decided to be instrument constant 1/k, then
ρ＝kΔP (5)
Formula (5) is design considerations of the present invention.
The pressure measurement parts that adopt one of beneficial effect of the present invention to be based on the present invention's design and the liquid level gauge of making directly do not contact with the fluid to be measured medium; But through the gas transfer acting force; So can avoid causing existing pilot formula and the normal fault that occurs of called putting-into-type liquid level meter because of the fluid to be measured medium produces deposition, obstruction, corrosion, fouling etc.; Improve reliability, prolonged serviceable life; It is simple in structure that two of beneficial effect is based on the liquid level gauge that the present invention designs and produces, and is easy to make, and cheap, working service is easy.
Description of drawings
The present invention is further specified with first and second embodiment below in conjunction with accompanying drawing.
Fig. 1 is the gas circuit and the circuit theory diagrams of first embodiment of the invention, is used for measuring the concentration of slurry of arbitrary shape container.Fig. 1 (a) inserts liquid medium for wireway from the top, figure (b) inserts liquid medium from the side for wireway.
Fig. 2 is the gas circuit and the circuit theory diagrams of second embodiment of the invention, is used for the concentration of slurry that measuring channel is flowing.
Among Fig. 1,1-source of the gas, 2, the 3-barometric damper, 4, the 5-flowmeter, 6, the 7-wireway, 8-differential pressure pick-up, 9-indicator.
Among Fig. 2,1-source of the gas, 2, the 3-barometric damper, 4, the 5-flowmeter, 6, the 7-wireway, 8-differential pressure pick-up, 9-indicator, the vertical pipeline section of 10-.
Embodiment
In Fig. 1, the air-flow that draws from source of the gas (1) is divided into two-way: the one tunnel connects through tee pipe fitting through barometric damper (2) and flowmeter (4) and the air intake opening of the wireway (6) that inserts container top and the low-pressure chamber of differential pressure pick-up (8); Another road is connected through tee pipe fitting with the air intake opening of the wireway (7) that inserts the container bottom and the hyperbaric chamber of differential pressure pick-up (8) through barometric damper (3) and flowmeter (5); The terminal gas outlet of said wireway (6) is positioned at the top of the terminal gas outlet of wireway (7), and the vertical range between the two is known number L, and concrete numerical value is looked measured medium measurement of concetration scope and decided.Measuring process: the aperture of regulating barometric damper (2) and (3) equates the indicated value of flowmeter (4) and (5), and concrete flow speed value has bubble effusion liquid level degree of being in rapid succession with the gas outlet of two wireways.The output of differential pressure pick-up (8) is directly proportional with concentration of slurry, that is: ρ=k Δ P is indicated by indicator (9).
Technical scheme for concentration of slurry in the measuring channel shown in Figure 2: the air-flow that draws from source of the gas (1) is divided into two-way, and one the tunnel connects through tee pipe fitting with the air intake opening of vertical pipeline section (10) upper airway (6) and the low-pressure chamber of differential pressure pick-up (7) with flowmeter (4) through barometric damper (2); Another road is connected through tee pipe fitting with the air intake opening of vertical pipeline section (9) lower guide tracheae (7) and the hyperbaric chamber of differential pressure pick-up (8) with flowmeter (5) through barometric damper (3); Vertical range between said wireway (6) and (7) gas outlet is known number L, and concrete numerical value is looked measured medium measurement of concetration scope and decided.Measuring process: the aperture of regulating barometric damper (2) and (3) equates flowmeter (4) and (5) indicated value, and concrete flow speed value has bubble effusion liquid level degree of being in rapid succession with the gas outlet of two wireways.The output of differential pressure pick-up (8) is directly proportional with concentration of slurry, that is: ρ=k Δ P is indicated by indicator (9).
Source of the gas (1) can draw from compressed-air line, also can provide micro air pump for oneself by instrument, and its power should be enough to make bubble to overcome resistance that liquid pressure forms and surface tension and the liquid level of constantly overflowing; Special liquid slurries for can not ingress of air can be used inert gas steel cylinder air feed.
Parts specification and technical data that the first embodiment of the present invention is selected for use are following: the measurement range of differential pressure pick-up: ± 630Pa, resolution: 2Pa; The material of two wireways is a teflon, and tracheal diameter is 4mm, the vertical range L=100mm of the port of giving vent to anger of two measuring tubes; Having the float type flow meter (4) of barometric damper (2) and (3) and the meter full scale of (5) is 0-1L/min, regulates gas velocity and is 200ml/min and make bubble from the port of giving vent to anger of the two wireways liquid level of overflowing in rapid succession.
Parts specification and technical data that the second embodiment of the present invention is selected for use are following: the measurement range of differential pressure pick-up: 0-5kpa, precision 0.2%; Vertical pipeline section (9) is selected the transparent organic glass pipe of internal diameter 50mm, long 600mm for use, and the vertical range between lower guide tracheae (7) and the upper airway (6) is L=300mm; Having the float type flow meter (4) of barometric damper (2) and (3) and the meter full scale of (5) is 0-1L/min, and the adjusting gas velocity is 200ml/min, makes bubble from the port of giving vent to anger of the two wireways liquid level of overflowing in rapid succession.
The source of the gas of two embodiment of the present invention (1) adopts commercially available micro air pump, flow range: 0～5L/min, single-phase AC 220V/50Hz power supply.
When the fluid to be measured medium must not contact with air, source of the gas can adopt nitrogen or other inert gas.
Claims (6)
1. aut.eq. of utilizing slurry specific gravity in the know-why measuring vessel that bubble method measures liquid internal pressure; Form by source of the gas (1), barometric damper (2) and (3), flowmeter (4) and (5), the wireway (6) and (7), differential pressure pick-up (8), the indicating instrument (9) that insert in the fluid to be measured; It is characterized in that: the air-flow of source of the gas (1) is divided into two-way, and one the tunnel connects through tee pipe fitting through barometric damper (2) and flowmeter (4) and the air intake opening of the wireway (6) that inserts container top and the low-pressure chamber of differential pressure pick-up (8); Another road is connected through tee pipe fitting with the air intake opening of the wireway (7) that inserts the container bottom and the hyperbaric chamber of differential pressure pick-up (8) through barometric damper (3) and flowmeter (5); The terminal gas outlet of said wireway (6) is positioned at the top of the terminal gas outlet of wireway (7), and the vertical range between the two is known number L; The aperture of regulating barometric damper (2) and (3) equates flowmeter (4) and (5) indicated value; The output of differential pressure pick-up (8) is directly proportional with slurry specific gravity, is indicated by indicator (9).
2. aut.eq. of utilizing slurry specific gravity in the know-why measuring channel that bubble method measures liquid internal pressure; Wireway (6) by in source of the gas (1), barometric damper (2) and (3), flowmeter (4) and (5), the insertion fluid to be measured is formed with (7), differential pressure pick-up (8), indicating instrument (9) and vertical pipeline section (10); It is characterized in that: the air-flow of source of the gas (1) is divided into two-way, and one the tunnel connects through tee pipe fitting with the air intake opening of vertical pipeline section (10) upper airway (6) and the low-pressure chamber of differential pressure pick-up (8) with flowmeter (4) through barometric damper (2); Another road is connected through tee pipe fitting with the air intake opening of vertical pipeline section (10) lower guide tracheae (7) and the hyperbaric chamber of differential pressure pick-up (8) with flowmeter (5) through barometric damper (3); Vertical range between said wireway (6) and (7) is known number L; The aperture of regulating barometric damper (2) and (3) equates flowmeter (4) and (5) indicated value; The output of differential pressure pick-up (8) is directly proportional with slurry specific gravity, is indicated by indicator (9).
3. according to claim 1 and 2 said devices, it is characterized in that: the concrete numerical value of the vertical range L between said wireway (6) and the wireway (7) is looked the measurement range of measured medium proportion and is decided.
4. according to claim 1 and 2 said devices, it is characterized in that: it is identical with the gas velocity of wireway (7) to feed wireway (6), and specifically numerical value is with the bubble liquid level degree of being of overflowing in rapid succession from the gas outlet of said wireway (6) and (7).
5. according to claim 1 and 2 said devices, it is characterized in that: the output of differential pressure pick-up (8) connects indicator (9), is used to indicate rate of specific gravity.
6. according to claim 1 and 2 said devices, it is characterized in that: the hyperbaric chamber of differential pressure pick-up (8) and low-pressure chamber can be replaced by two pressure transducers respectively, and the difference of the output signal of pressure transducer is identical with differential pressure pick-up output signal effect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105719959A CN102486445A (en) | 2010-12-03 | 2010-12-03 | Bubble type slurry densimeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105719959A CN102486445A (en) | 2010-12-03 | 2010-12-03 | Bubble type slurry densimeter |
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| Publication Number | Publication Date |
|---|---|
| CN102486445A true CN102486445A (en) | 2012-06-06 |
Family
ID=46151964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105719959A Pending CN102486445A (en) | 2010-12-03 | 2010-12-03 | Bubble type slurry densimeter |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104697709A (en) * | 2014-12-05 | 2015-06-10 | 泽尼特泵业（苏州）有限公司 | Sewage pressure data acquisition system |
| CN105865975A (en) * | 2016-06-15 | 2016-08-17 | 上海隧道工程有限公司 | Slurry proportion detection device and method for slurry shield |
| CN112710583A (en) * | 2020-12-28 | 2021-04-27 | 中国人民解放军92493部队计量测试研究所 | Electrolyte density measuring device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2094741U (en) * | 1991-06-27 | 1992-01-29 | 辽河石油学校 | Pressure difference slurry density test instrument |
| CN1527030A (en) * | 2003-09-19 | 2004-09-08 | 桂林电子工业学院 | Multiple parameter measurement device and method for small caliber and small flow fluid |
| CN2656994Y (en) * | 2003-12-02 | 2004-11-17 | 冯长周 | Liquid level-concentration measuring device |
| CN1963449A (en) * | 2006-11-20 | 2007-05-16 | 江苏苏源环保工程股份有限公司 | Testing method for serum density of serum pot or fume desulfurating absorption tower |
| US7669473B2 (en) * | 2005-05-11 | 2010-03-02 | Innovative Solutions & Support, Inc. | Pressure-based aircraft fuel capacity monitoring system and method |
-
2010
- 2010-12-03 CN CN2010105719959A patent/CN102486445A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2094741U (en) * | 1991-06-27 | 1992-01-29 | 辽河石油学校 | Pressure difference slurry density test instrument |
| CN1527030A (en) * | 2003-09-19 | 2004-09-08 | 桂林电子工业学院 | Multiple parameter measurement device and method for small caliber and small flow fluid |
| CN2656994Y (en) * | 2003-12-02 | 2004-11-17 | 冯长周 | Liquid level-concentration measuring device |
| US7669473B2 (en) * | 2005-05-11 | 2010-03-02 | Innovative Solutions & Support, Inc. | Pressure-based aircraft fuel capacity monitoring system and method |
| CN1963449A (en) * | 2006-11-20 | 2007-05-16 | 江苏苏源环保工程股份有限公司 | Testing method for serum density of serum pot or fume desulfurating absorption tower |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104697709A (en) * | 2014-12-05 | 2015-06-10 | 泽尼特泵业（苏州）有限公司 | Sewage pressure data acquisition system |
| CN105865975A (en) * | 2016-06-15 | 2016-08-17 | 上海隧道工程有限公司 | Slurry proportion detection device and method for slurry shield |
| CN112710583A (en) * | 2020-12-28 | 2021-04-27 | 中国人民解放军92493部队计量测试研究所 | Electrolyte density measuring device |
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Application publication date: 20120606 |