CN102507911B - Method and device for detecting content of liquid ammonia in rubber latex - Google Patents
Method and device for detecting content of liquid ammonia in rubber latex Download PDFInfo
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- CN102507911B CN102507911B CN201110417755.8A CN201110417755A CN102507911B CN 102507911 B CN102507911 B CN 102507911B CN 201110417755 A CN201110417755 A CN 201110417755A CN 102507911 B CN102507911 B CN 102507911B
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Abstract
The invention discloses a method and device for detecting the content of liquid ammonia in rubber latex. The detection method comprises the following steps of: placing a latex liquid raw material with known aqueous ammonia content into a constant-temperature sealed agitation chamber; agitating the latex liquid to volatilize the liquid ammonia in the latex liquid into a gaseous ammonia and discharge the gaseous ammonia from the gas outlet of the constant-temperature sealed agitation chamber; connecting the gas outlet with a gas discharging pipe and arranging a flow sensor and a concentration sensor on the gas discharging pipe so as to detect the flow and concentration of ammonia gas in outflow air; obtaining the amount of the overflowed ammonia gas by virtue of the flow of the air and the concentration of the ammonia gas so as to further calculate the content of the liquid ammonia in the constant-temperature sealed agitation chamber. According to the invention, a liquid ammonia content detection system is combined with an execution system and the content of the liquid ammonia in the rubber latex raw material is continuously detected in an on-line manner and in real time, so that the industrial production efficiency is greatly improved and industrial production wastes are greatly reduced.
Description
technical field:
The present invention relates to the online real-time detection method of liquid ammonia content and device in a kind of elastomer latex.
background technology:
Preserve the method for latex and produce the chemical preservation method of upper extensively employing to extend the shelf life of latex.The most frequently used preservative agent is ammonia, is secondly formaldehyde, sodium sulphite and some compound preservative agents.
Ammonia plays versatile effect to the preservation of latex.(1) sterilization, press down enzyme and can remove or alleviate bacterium, the destabilization of enzyme to latex.(2) alkalescence can in and the acid that produces due to bacterial action in latex, increase the negative charge on micelle surface, improve the stability of latex.(3) metallic ion separant ammonia can react with magnesium ion, phosphate radical in latex, generates the minimum magnesium phosphate of solubleness hungry, removes the effect that magnesium ion destroys latex stability.(4) higher fatty acid that deflocculant ammonia discharges with lipides reacts, and generates higher fatty acid money soap, increases the negative charge of micelle.(5) make carbohydrate generate aldehyde ammonia or ketone ammino-complex is no longer decomposed and utilizes by bacterium, thereby suppress the generation of volatile fatty acid or reduce the generating rate of this acid.
Latex is preserved the ammonia of use in early days, is all ammoniacal liquor.Latex ammonia residual is moderate.Very little, do not reach the object of preserving latex; Too much, not only waste ammonia, but also can increase measuring with acid of coagulated latex thereafter.As produce rubber, ammonia consumption be generally latex heavy 0.05% ~ 0.08%; If produce centrifugal concentrating latex, ammonia consumption is controlled at 0.15% ~ 0.35 line that latex is heavy conventionally.With ammonia, as latex preservative, should also be noted that.(1) the ammonification time due to bacterium and enzyme to latex act on rubber tapping after just start immediately, therefore ammonification is more early, preservation effect is better.(2) ammonia concn is as adopted receipts glue bucket to add ammonia process, and ammonia concn is better with 10% left and right.Concentration is too low, means that to add the water of latex many, and this not only increases latex freight volume, as produced centrifugal concentrating latex, also can reduce centrifuging efficiency.Otherwise ammoniacal liquor is too dense, the volatilization loss of ammonia is large, and also unfavorable latex mixes with the even of ammonia.(3) ammonia of taking care has spread effect to eyes, and skin is corrosive, and during use, does not contact with human body.With before to process with the alkalization of sodium carbonate or NaOH and decolouring.
summary of the invention:
What the object of the invention is to detect for ammon amount in elastomer latex raw material in commercial production is non-non real-time online, provides a kind of and can detect online, detect in real time method and the device that in elastomer latex, ammonia content detects.
For solving the problems of the technologies described above, the technical solution used in the present invention is: liquefied ammonia detection method of content in a kind of elastomer latex, the known latex liquid raw material of ammoniacal liquor content is inserted in a constant-temperature enclosed teeter chamber, stir latex liquid, make the liquefied ammonia in latex liquid evaporate into gaseous state and discharge from the gas outlet of constant-temperature enclosed teeter chamber, in gas outlet, connect gas outlet, and flow sensor and concentration sensor are set on gas outlet for detection of ammonia, are flowing out airborne flow and concentration, the amount that obtains overflowing ammonia by the flow of air and the concentration of ammonia, and then extrapolate the content of the ammoniacal liquor in constant-temperature enclosed teeter chamber.
The pick-up unit of liquefied ammonia content in a kind of elastomer latex, comprise constant-temperature enclosed teeter chamber, ammonia flow concentration detecting unit and control module, in described constant-temperature enclosed teeter chamber, be provided with charging aperture, discharging opening and gas outlet, in described constant-temperature enclosed teeter chamber, be also provided with stirring apparatus and heating arrangement, the front end of described gas outlet is gas outlet, described ammonia concentration detecting unit is arranged in described gas outlet and is connected with described control module, and described ammonia concentration detecting unit comprises flow sensor and concentration sensor.
End at the import of described gas outlet, the centre of gas outlet and gas outlet is provided with described ammonia flow concentration detecting unit.
Principle of work: in Accurate Measurement raw material after liquefied ammonia content, raw material is put into constant-temperature enclosed teeter chamber from charging aperture and add thermal agitation, the ammonia that liquefied ammonia evaporates into gaseous state due to heating is along with air is discharged from gas outlet, two ends and middle-end at gas outlet detect concentration and the flow containing ammonia air, and send the Surveillance center of control module to, Surveillance center's storage data, calculate raffinate ammonia content in raw material, when liquefied ammonia content meets commercial production demand, control constant-temperature enclosed teeter chamber and open discharging opening, raw material is delivered to further work order.
Advantage of the present invention is: liquefied ammonia content detection system and executive system combined, and liquefied ammonia content in real-time online continuous detecting elastomer latex raw material, commercial production efficiency is improved greatly, commercial production waste material reduces many.
Accompanying drawing explanation
Fig. 1 elastomer latex content detection theory diagram.
embodiment:
Below in conjunction with accompanying drawing, the present invention is described further:
As shown in Figure 1, pick-up unit of the present invention, comprise constant-temperature enclosed teeter chamber 1, ammonia flow concentration detecting unit 6 and control module, in constant-temperature enclosed teeter chamber 1, be provided with charging aperture 2, discharging opening 3 and gas outlet, in constant-temperature enclosed teeter chamber 1, be also provided with stirring apparatus 5 and heating arrangement 4, the front end of gas outlet is gas outlet 7, ammonia concentration detecting unit is arranged in gas outlet and is connected with control module, control module ammonia concentration detecting unit comprises flow sensor and concentration sensor, flow sensor and concentration sensor are arranged on the import 9 of gas outlet, centre 10 and outlet 11, by ammonia flow concentration detecting unit 6 is set at gas outlet diverse location simultaneously, by to the analyzing and processing of three detecting unit data such as adopting mean value etc. to improve the detection to ammonia concentration.Ammonia detecting sensor is used the 3AM of Britain CITY, and gas flow sensor is used LUGB-N.
Principle of work: in Accurate Measurement raw material after liquefied ammonia content, raw material is put into constant-temperature enclosed teeter chamber from charging aperture and add thermal agitation, the ammonia that liquefied ammonia evaporates into gaseous state due to heating is along with air is discharged from gas outlet, two ends and middle-end at gas outlet detect concentration and the flow containing ammonia air, and send the Surveillance center 8 of control module to, Surveillance center's storage data, calculate raffinate ammonia content in raw material, when liquefied ammonia content meets commercial production demand, control constant-temperature enclosed teeter chamber and open discharging opening, raw material is delivered to further work order.
Advantage of the present invention is: liquefied ammonia content detection system and executive system combined, and liquefied ammonia content in real-time online continuous detecting elastomer latex raw material, commercial production efficiency is improved greatly, commercial production waste material reduces many.
Claims (3)
1. liquefied ammonia detection method of content in an elastomer latex, it is characterized in that: the known latex liquid raw material of ammoniacal liquor content is inserted in a constant-temperature enclosed teeter chamber, stir latex liquid, make the liquefied ammonia in latex liquid evaporate into gaseous state and discharge from the gas outlet of constant-temperature enclosed teeter chamber, in gas outlet, connect gas outlet, and flow sensor and concentration sensor are set on gas outlet for detection of ammonia, are flowing out airborne flow and concentration, the amount that obtains overflowing ammonia by the flow of air and the concentration of ammonia, and then extrapolate the content of the ammoniacal liquor in constant-temperature enclosed teeter chamber.
2. the pick-up unit for a kind of elastomer latex liquefied ammonia detection method of content described in claim 1, it is characterized in that: comprise constant-temperature enclosed teeter chamber (1), ammonia flow concentration detecting unit (6) and control module (8), in described constant-temperature enclosed teeter chamber (1), be provided with charging aperture (2), discharging opening (3) and gas outlet, in described constant-temperature enclosed teeter chamber (1), be also provided with stirring apparatus (5) and heating arrangement (4), the front end of described gas outlet is gas outlet (7), described ammonia flow concentration detecting unit (6) is arranged in described gas outlet and is connected with described control module (8), described ammonia flow concentration detecting unit (6) comprises flow sensor and concentration sensor.
3. pick-up unit according to claim 2, is characterized in that: the end (11) at the import (9) of described gas outlet, the centre (10) of gas outlet and gas outlet is provided with described ammonia flow concentration detecting unit (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110417755.8A CN102507911B (en) | 2011-12-14 | 2011-12-14 | Method and device for detecting content of liquid ammonia in rubber latex |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110417755.8A CN102507911B (en) | 2011-12-14 | 2011-12-14 | Method and device for detecting content of liquid ammonia in rubber latex |
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| Publication Number | Publication Date |
|---|---|
| CN102507911A CN102507911A (en) | 2012-06-20 |
| CN102507911B true CN102507911B (en) | 2014-11-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110417755.8A Expired - Fee Related CN102507911B (en) | 2011-12-14 | 2011-12-14 | Method and device for detecting content of liquid ammonia in rubber latex |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104729950B (en) * | 2015-02-27 | 2017-06-23 | 杭州市特种设备检测研究院 | A kind of ammoniacal liquor apparatus for measuring concentration |
| CN106990058B (en) * | 2017-05-31 | 2023-05-02 | 南京霍普斯科技有限公司 | On-site rapid high-efficiency full-automatic detection system for liquid ammonia residues |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| FI982570A (en) * | 1998-11-27 | 2000-05-28 | Neste Chemicals Oy | Method and apparatus for determining the viscoelastic properties of process fluids and its use |
| CN1382978A (en) * | 2002-05-28 | 2002-12-04 | 山东省恒大环保科技开发有限公司 | In-situ detection method for ammonia and nitrogen |
| CN100561211C (en) * | 2007-06-12 | 2009-11-18 | 北京大学 | A kind of ammonia test method and device |
| CN202362298U (en) * | 2011-12-14 | 2012-08-01 | 南京信息工程大学 | Device for detecting content of liquid ammonia in rubber emulsion |
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- 2011-12-14 CN CN201110417755.8A patent/CN102507911B/en not_active Expired - Fee Related
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