CN1789968A - Method and apparatus for online detecting density of alumina slurry - Google Patents
Method and apparatus for online detecting density of alumina slurry Download PDFInfo
- Publication number
- CN1789968A CN1789968A CN 200510003326 CN200510003326A CN1789968A CN 1789968 A CN1789968 A CN 1789968A CN 200510003326 CN200510003326 CN 200510003326 CN 200510003326 A CN200510003326 A CN 200510003326A CN 1789968 A CN1789968 A CN 1789968A
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- Prior art keywords
- pneumatic
- valve
- density
- flowmeter
- plc
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- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 title claims abstract description 10
- 238000000034 method Methods 0.000 title claims abstract description 7
- 239000002002 slurry Substances 0.000 title claims description 13
- 238000001514 detection method Methods 0.000 claims description 17
- 238000010998 test method Methods 0.000 claims description 6
- 238000011010 flushing procedure Methods 0.000 abstract description 2
- 238000005299 abrasion Methods 0.000 abstract 1
- 238000005259 measurement Methods 0.000 abstract 1
- 230000000737 periodic effect Effects 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 230000005855 radiation Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 206010039509 Scab Diseases 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Landscapes
- Sampling And Sample Adjustment (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention discloses an on-line measuring method and device of alumina slip density, which comprises the following parts: two pneumatic switch valves, pneumatic adjustment valve, quality flowmeter, a case of electromagnetic flowmeter, pressure transmitter, centrifugal pump, a case of PLC. The invention solves the scaling and abrasion problem of quality flowmeter due to periodic flushing of quality flowmeter in the measuring pipe, which possesses accurate reliable measurement and long utility lifetime.
Description
Technical field:
The present invention relates to a kind of density of alumina slurry online test method and device.
Technical background:
Pulp density in the aluminum oxide production process is a key parameter, and a lot of control system need pulp density to control such as important process processes such as batching, grog strippings, and is significant to improving technic index increase economic benefit.
Because tested slip complicated component easily scabs, is corrosive, and can only select contactless nuclear radiation densimeter for use in present stage.
But use nuclear radiation densimeter that following problem is arranged:
1, the source of penetrating of nuclear radiation is a dangerous substance, complex management (it is all controlled to examine, buy, transport, install, move, scrap, deposit each link), and not environmental protection has limited large-area promoting the use of.
2, the nominal accuracy of nuclear radiation densimeter manufacturer is all than higher, but that the actual field accuracy of detection is far from is so high.Since must with the density value that draws of assay nuclear radiation densimeter is demarcated, this just needs density of detected material at timing signal bigger variation to be arranged, and the produced on-site condition does not often reach; Add the influence of the error that produces when material component changes, so actual detected precision sighting target stable condition and material component and instrument maintenance levels and decide, it is bigger to fluctuate.
Summary of the invention:
The objective of the invention is to: a kind of density of alumina slurry on-line measuring device is provided,, prolongs its serviceable life, and the accuracy of detection is guaranteed to solve the fouling and the wear problem of mass flowmeter.
The present invention is achieved in that slip shunted by pipeline (8) from trunk line (9), through pressure unit (2), pneumatic on-off valve (1), by electromagnetic flowmeter (5) and pneumatic control valve (7) control slip flow, carry out Density Detection by mass flowmeter (6); Said process is controlled by PLC.
Electromagnetic flowmeter (5) and pneumatic control valve (7) control slip flow are at 2.0～3.0m
3/ h.
Can be 10 minutes at interval detection time～5 hours.
The used device of method is made up of shunt conduit (8), trunk line (9), pneumatic on-off valve (1), pneumatic control valve (7), mass flowmeter (6), electromagnetic flowmeter (5), pressure unit (2) and PLC, is connected with pneumatic on-off valve (1), pressure unit (2) between trunk line (9) and the shunt conduit (8); Shunt conduit (8) also is connected with electromagnetic flowmeter (5), mass flowmeter (6), pneumatic control valve (7); PLC is connected with said elements by cable.
Between last pneumatic on-off valve (1) of shunt conduit (8) and electromagnetic flowmeter (5), be connected with pipeline (10); Pipeline (10) is connected with centrifugal pump (3), pneumatic on-off valve (4), and centrifugal pump (3), pneumatic on-off valve (4) are connected with PLC by cable.
Regularly carry out Density Detection by PLC control, can set detection time at interval.Between last pneumatic on-off valve (1) of shunt conduit (8) and electromagnetic flowmeter (5), be connected with pipeline (10) by pressure unit; Pipeline (10) is connected with centrifugal pump (3), pneumatic on-off valve (4).Automatically open, slip through shunt conduit (8), by electromagnetic flowmeter (5) and pneumatic control valve (7), is controlled at 2.0～3.0m to the slip flow from trunk line (9)
3/ h carries out Density Detection by mass flowmeter (6).After detection is finished, pneumatic on-off valve (4) is opened automatically, wash-down water is squeezed into by pipeline (10) with centrifugal pump (3), as closes pneumatic control valve (7), and then wash-down water enters shunt conduit (8) pneumatic on-off valve (1) and pressure unit (2) are washed automatically; As close pneumatic on-off valve (1), then wash-down water enters in the pipeline (8) mass flowmeter (6), electromagnetic flowmeter (5) and pneumatic control valve (7) is washed automatically, solved wearing and tearing and the scale problems of slip to mass flowmeter (6) and electromagnetic flowmeter (5), prolong its serviceable life, the accuracy of detection is guaranteed.
The present invention compared with prior art has the following advantages:
1, adopt mass flowmeter that the aluminum oxide production process slurries are carried out Density Detection;
2,, in measuring pipeline, introduce wash-down water and carry out the timing flushing measuring pipeline for preventing the mass flowmeter fouling;
3, in order to reduce the wearing and tearing of slurry during, find the shortest Measuring Time that can guarantee measuring accuracy by experiment, so both prolonged the serviceable life of mass flowmeter, can guarantee the accuracy of testing result again mass flowmeter;
4, whole detection system is designed as an instrument, contour structures is compact as far as possible, is easy to install, dismantle;
5, control system adopts PLC, can realize automatic control.
Accompanying drawing 1 is a synoptic diagram of the present invention.
Embodiment:
Embodiments of the invention:
PLC is connected respectively with pneumatic on-off valve 1, pneumatic on-off valve 4, pneumatic control valve 7, mass flowmeter 6, electromagnetic flowmeter 5, pressure unit 2, centrifugal pump 3 by cable, to realize automatic control.
Regularly carry out the red mud pulp density by PLC control and detect, be set at 1 hour detection time at interval.There is red mud to flow in the pipeline as can be known by pressure unit 2.The red mud pulp density detects beginning, and pneumatic on-off valve 1 is opened automatically, and the red mud slurry through shunt conduit 8, by electromagnetic flowmeter 5 and pneumatic control valve 7, is starched flow control to red mud at 2.0～3.0m from trunk line 9
3/ h carries out Density Detection by mass flowmeter 6.After detection was finished, pneumatic on-off valve 4 was opened automatically, and wash-down water is squeezed into by pipeline 10 with centrifugal pump 3, at first closed pneumatic control valve 7, and then wash-down water washes automatically to pneumatic on-off valve 1 and pressure unit 2.Close pneumatic on-off valve 1 again, then wash-down water washes automatically to mass flowmeter 6, electromagnetic flowmeter 5 and pneumatic control valve 7, solved wearing and tearing and the scale problems of red mud slurry, prolonged its serviceable life, the accuracy of detection is guaranteed mass flowmeter 6 and electromagnetic flowmeter 5.
Claims (5)
1, a kind of density of alumina slurry online test method, it is characterized in that: slip is shunted by pipeline (8) from trunk line (9), through pressure unit (2), pneumatic on-off valve (1), by electromagnetic flowmeter (5) and pneumatic control valve (7) control slip flow, carry out Density Detection by mass flowmeter (6); Said process is controlled by PLC.
2, density of alumina slurry online test method according to claim 1 is characterized in that: electromagnetic flowmeter (5) and pneumatic control valve (7) control slip flow are at 2.0～3.0m
3/ h.
3, density of alumina slurry online test method according to claim 1 is characterized in that: can be 10 minutes at interval detection time～5 hours.
4, the used device of a kind of density of alumina slurry online test method as claimed in claim 1, it is made up of shunt conduit (8), trunk line (9), pneumatic on-off valve (1), pneumatic control valve (7), mass flowmeter (6), electromagnetic flowmeter (5), pressure unit (2) and PLC, it is characterized in that: be connected with pneumatic on-off valve (1), pressure unit (2) between trunk line (9) and the shunt conduit (8); Shunt conduit (8) also is connected with electromagnetic flowmeter (5), mass flowmeter (6), pneumatic control valve (7); PLC is connected with said elements by cable.
5, density of alumina slurry on-line measuring device according to claim 4 is characterized in that: go up between pneumatic on-off valve (1) and the electromagnetic flowmeter (5) in shunt conduit (8) and be connected with pipeline (10); Pipeline (10) is connected with centrifugal pump (3), pneumatic on-off valve (4), and centrifugal pump (3), pneumatic on-off valve (4) are connected with PLC by cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100033260A CN100494969C (en) | 2005-12-16 | 2005-12-16 | Method and apparatus for online detecting density of alumina slurry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100033260A CN100494969C (en) | 2005-12-16 | 2005-12-16 | Method and apparatus for online detecting density of alumina slurry |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1789968A true CN1789968A (en) | 2006-06-21 |
| CN100494969C CN100494969C (en) | 2009-06-03 |
Family
ID=36787976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100033260A Active CN100494969C (en) | 2005-12-16 | 2005-12-16 | Method and apparatus for online detecting density of alumina slurry |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100494969C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101881377A (en) * | 2010-06-29 | 2010-11-10 | 云南大红山管道有限公司 | Iron concentrate pipeline transport online pulp magnetism testing device and control method thereof |
| CN102384884A (en) * | 2010-09-03 | 2012-03-21 | 杨玉娟 | Sampling type size density measuring method |
| CN103185685A (en) * | 2011-12-27 | 2013-07-03 | 贵阳铝镁设计研究院有限公司 | Method and structure for improving measurement accuracy of nuclear radiation densimeter in dissolution working section |
| CN115900861A (en) * | 2023-03-13 | 2023-04-04 | 西安成立航空制造有限公司 | Aero-engine nozzle flow testing device and method |
-
2005
- 2005-12-16 CN CNB2005100033260A patent/CN100494969C/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101881377A (en) * | 2010-06-29 | 2010-11-10 | 云南大红山管道有限公司 | Iron concentrate pipeline transport online pulp magnetism testing device and control method thereof |
| CN102384884A (en) * | 2010-09-03 | 2012-03-21 | 杨玉娟 | Sampling type size density measuring method |
| CN103185685A (en) * | 2011-12-27 | 2013-07-03 | 贵阳铝镁设计研究院有限公司 | Method and structure for improving measurement accuracy of nuclear radiation densimeter in dissolution working section |
| CN115900861A (en) * | 2023-03-13 | 2023-04-04 | 西安成立航空制造有限公司 | Aero-engine nozzle flow testing device and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100494969C (en) | 2009-06-03 |
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