CN102589934A - Oxygen concentration measurement sampling flow compensation device of air flow conveying system - Google Patents
Oxygen concentration measurement sampling flow compensation device of air flow conveying system Download PDFInfo
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- CN102589934A CN102589934A CN201110338270XA CN201110338270A CN102589934A CN 102589934 A CN102589934 A CN 102589934A CN 201110338270X A CN201110338270X A CN 201110338270XA CN 201110338270 A CN201110338270 A CN 201110338270A CN 102589934 A CN102589934 A CN 102589934A
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Abstract
An oxygen concentration measurement sampling flow compensation device of an air flow conveying system comprises an oxygen content analyzer, a nitrogen machine and a centrifugal machine. A valve (5), a valve (6), a valve (7), an adjusting and pressure reducing valve (V8) and a linear vacuum generator are arranged in a sampling channel of the oxygen content analyzer and are in linkage with a valve (2), the valve (5), the valve (6) and the valve (7). According to the oxygen concentration measurement sampling flow compensation device of the air flow conveying system, the linear vacuum generator is used for effectively compensating pressure for sampling air flow of the oxygen content analyzer of an air flow conveying device, a relatively stable sampling flow is established in the system to maintain the real time monitoring and the signal conversion of the analyzer, influences of various interference factors in the system are overcome, the analyzer is enabled to promptly track the change of oxygen content in the system, nitrogen consumption is decreased, and continuous production of the system is guaranteed.
Description
Technical field
The present invention relates to a kind of flow delivery systems oxygen concentration and measure the sampling flow compensation system.
Background technology
In the powdered medication production run, in order to reduce contacting of human error/avoid human body and material, the air-flow conveying equipment is widely used in drug and food production.The positive negative pressure mixing conveying device of dilute phase during related flow delivery systems is produced among this paper; Be used for transmitting the crystal powder, air-flow recycles, and material takes off the entering system of getting rid of through hydro-extractor; Still have residual solvent gas to exist; In order to prevent burning or explosive incident, set up GE oxygen analyzer/nitrogen bucking-out system in the system, oxygen concentration in the system is controlled between the 4-6%.
Shown in accompanying drawing one, air-flow power is provided by roots blower in the system, material through hydro-extractor take off get rid of after; Get into material bin and temporarily deposit, feed bin has been installed three level-sensing devices, be respectively among HW height/MW/LW is low, and material level detects; When oxygen content in the system less than 6% and feed bin in when having high charge level or middle material level; Valve V2 opens, and system begins feeding, and material gets into cyclone separator and separates; Send downstream dryer equipment to through valve V4, the air-flow that gets into cyclone separator is recycled by the roots blower suction through catching the dirt bag.
When oxygen content in the system surpassed 6%, system will stop to converge expected to mend nitrogen.Air compressor machine provides pressurized air, and the entering storage tank stores is subsequent use after nitrogen making machine generates nitrogen.Oxygen content detector is installed before and after the roots blower--the XM02 type oxygen concentration analyser that-GE company produces, XM02 type oxygen concentration analyser utilize blower fan front and back pressure reduction, and air-flow sampling in the system is detected, and pass to PLC through electrical signal conversion then.During normal mass transport, material is arranged in the pipeline, have the pressure reduction about 150mbar before and after the blower fan, sample flow is conditioned and is controlled at 200cc/min, and when stopping feeding or additional nitrogen, the pressure reduction before and after the blower fan will become very little.System is when replenishing nitrogen, and valve V2 closes, and stops mass transport; Valve V3, V1 open, and nitrogen gets into system, and pressure reduction reduces before and after the blower fan; Sampling detects flow and reduces, though the XM02 that GE company produces can overcome the influence that sample flow fluctuates in 0.1-2.0SCFH (50-1000cc/min) value range, when flow value is reduced to a trace value; Even when being zero, oxygen content detects will present hysteresis phenomenon.Nitrogen gas generating system adopts carbonaceous molecular sieve transformation absorption principle to produce nitrogen, nitrogen gas purity and pressure correlation, and when nitrogen pressure is on the low side, nitrogen gas purity will descend to some extent.When nitrogen is mended by system; Lag behind when making nitrogen storage tank pressure drop to a low value if detect, and PLC can't stop to replenish the nitrogen instruction again when oxygen concentration is below standard; Nitrogen gas purity will be in low state always in the airflow pipeline, therefore stagnation of system program.
The phenomenon that said system is stagnated seldom occurs in daily production, and this system belongs to automatic producing device, and nobody operates, in case occur, though alerting signal is arranged, waits operating personnel to find to last for a long time.The analysis of failure phenomenon, sample flow sharply reduces when mending nitrogen, and cause oxygen analyzer to appear detecting hysteresis is basic reason.Air compressor machine adds/and suitable between unload zone, cause air compressor machine pressure to change too greatly, or pressure set points is too small, will directly influence system nitrogen purity; The variation of filter bag air penetrability in the material conveying process, the leakage of system pipeline etc. all will produce the factor of further disturbing than measurement of oxygen content value under the low discharge to sampling, thereby the instability of the not timing/system of fault occur.
Summary of the invention:
The object of the invention will provide a kind of flow delivery systems oxygen concentration to measure the sampling flow compensation system exactly, and it can overcome the existing above problem of existing equipment.The objective of the invention is to realize like this; A kind of flow delivery systems oxygen concentration is measured the sampling flow compensation system; Comprise that oxygen analysis appearance, nitrogen machine, hydro-extractor form; It is characterized in that: in oxygen analysis appearance sampling passage, set up valve V5, valve V6, valve V7, regulate reduction valve V8 and linear vacuum generator, and link with valve V2, valve V5, valve V6, valve V7.The present invention has adopted the linear vacuum generator; Air-flow conveying equipment oxygen content analyser sampling air flow flow is carried out the efficient pressure compensation, in system, set up a metastable sample streams, in order to keep the real-time monitoring and the conversion of signals of analyser; Overcome the influence of each disturbing factor in the system; Make the variation of oxygen content in the timely tracker of analyser, reduce the consumption of nitrogen, guarantee system's continuity production.
Description of drawings:
Fig. 1 is the legacy equipment structural representation;
Fig. 2 is a structural representation of the present invention;
1. air compressor machine, 2. nitrogen machine, 3. nitrogen storage tank, 4. valve V1,5. valve V3,6. hydro-extractor; 7. feed bin, 8. discharging spiral, 9. valve V2,10. roots blower, 11. oxygen analysis appearance; 12. cyclone separator, 13. valve V4,14. middle hoppers, 15. valve V9,16. dryers; 17. valve V6,18. valve V5,19. linear vacuum generators, 20. valve V7,21. regulate reduction valve V8.
Embodiment: the present invention is described further below in conjunction with accompanying drawing;
A kind of flow delivery systems oxygen concentration is measured the sampling flow compensation system; Comprise that oxygen analysis appearance, nitrogen machine, hydro-extractor form; It is characterized in that: in oxygen analysis appearance sampling passage, set up valve V5, valve V6, valve V7, regulate reduction valve V8 and linear vacuum generator, and link with valve V2, valve V5, valve V6, valve V7.During practical implementation, valve V2, V6 open during feeding, and valve V5, V7 close, and the linear vacuum generator is not worked, and oxygen analyzer sampling this moment stream obtains through pressure reduction before and after the blower fan; When valve V2 closes, stop feeding, valve V5, valve V7 open, and reduction valve V8 is regulated in the work of linear vacuum generator, makes oxygen analysis appearance sampling stream constant in 200 cc/min; When replenishing nitrogen, valve V1, valve V3, valve V5, valve V7 open, the sampling stream that the oxygen analysis appearance will keep relative stability, and oxygen content instantaneous value in the timely transmission system of PLC is saved a large amount of nitrogen, has safeguarded the continuity of producing.
Claims (1)
1. a flow delivery systems oxygen concentration is measured the sampling flow compensation system; Comprise that oxygen analysis appearance, nitrogen machine, hydro-extractor form; It is characterized in that: in oxygen analysis appearance sampling passage, set up valve V5, valve V6, valve V7, regulate reduction valve V8 and linear vacuum generator, and link with valve V2, valve V5, valve V6, valve V7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201110338270XA CN102589934A (en) | 2011-11-01 | 2011-11-01 | Oxygen concentration measurement sampling flow compensation device of air flow conveying system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110338270XA CN102589934A (en) | 2011-11-01 | 2011-11-01 | Oxygen concentration measurement sampling flow compensation device of air flow conveying system |
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| CN102589934A true CN102589934A (en) | 2012-07-18 |
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| CN201110338270XA Pending CN102589934A (en) | 2011-11-01 | 2011-11-01 | Oxygen concentration measurement sampling flow compensation device of air flow conveying system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106153408A (en) * | 2016-08-30 | 2016-11-23 | 宜昌市得心实用气体有限公司 | Oxygen purity on-line detecting system |
| CN110207090A (en) * | 2019-04-30 | 2019-09-06 | 浙江江山大众锅炉有限公司 | A kind of intelligent high-efficiency rate gas-steam boiler |
| CN113804518A (en) * | 2021-09-28 | 2021-12-17 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | High-purity and ultra-pure gas high-fidelity sampling device and method |
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| CN1721824A (en) * | 1998-09-11 | 2006-01-18 | 松下电器产业株式会社 | Flow measurer |
| CN1868843A (en) * | 2005-05-27 | 2006-11-29 | 上海金申德粉体工程有限公司 | Air-flow conveying device for both powder and granular material |
| CN101432613A (en) * | 2006-05-09 | 2009-05-13 | 住友精化株式会社 | Sample introduction system |
| WO2011013676A1 (en) * | 2009-07-31 | 2011-02-03 | 株式会社堀場製作所 | Exhaust gas sampling and analysis system |
| CN202351098U (en) * | 2011-11-01 | 2012-07-25 | 江苏江山制药有限公司 | Oxygen concentration measuring and sampling flow compensating device of gas flow conveying system |
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2011
- 2011-11-01 CN CN201110338270XA patent/CN102589934A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1721824A (en) * | 1998-09-11 | 2006-01-18 | 松下电器产业株式会社 | Flow measurer |
| CN1868843A (en) * | 2005-05-27 | 2006-11-29 | 上海金申德粉体工程有限公司 | Air-flow conveying device for both powder and granular material |
| CN101432613A (en) * | 2006-05-09 | 2009-05-13 | 住友精化株式会社 | Sample introduction system |
| WO2011013676A1 (en) * | 2009-07-31 | 2011-02-03 | 株式会社堀場製作所 | Exhaust gas sampling and analysis system |
| CN202351098U (en) * | 2011-11-01 | 2012-07-25 | 江苏江山制药有限公司 | Oxygen concentration measuring and sampling flow compensating device of gas flow conveying system |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106153408A (en) * | 2016-08-30 | 2016-11-23 | 宜昌市得心实用气体有限公司 | Oxygen purity on-line detecting system |
| CN106153408B (en) * | 2016-08-30 | 2018-08-28 | 宜昌市得心实用气体有限公司 | Oxygen purity on-line detecting system |
| CN110207090A (en) * | 2019-04-30 | 2019-09-06 | 浙江江山大众锅炉有限公司 | A kind of intelligent high-efficiency rate gas-steam boiler |
| CN113804518A (en) * | 2021-09-28 | 2021-12-17 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | High-purity and ultra-pure gas high-fidelity sampling device and method |
| CN113804518B (en) * | 2021-09-28 | 2024-04-16 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | High-purity and ultra-purity gas high-fidelity sampling device and method |
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Application publication date: 20120718 |