CN102507911A - 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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- CN102507911A CN102507911A CN2011104177558A CN201110417755A CN102507911A CN 102507911 A CN102507911 A CN 102507911A CN 2011104177558 A CN2011104177558 A CN 2011104177558A CN 201110417755 A CN201110417755 A CN 201110417755A CN 102507911 A CN102507911 A CN 102507911A
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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 liquid ammonia content online in real time detection method and device in a kind of elastomer latex.
Background technology:
Preserve the method for latex and produce the chemical preservation method of upward extensive employing to prolong effective storage life of latex.The most frequently used preservative agent is an ammonia, secondly is formaldehyde, sodium sulphite and some compound preservative agents.
Ammonia plays versatile effect to the preservation of latex.(1) sterilization, presses down enzyme and can remove or alleviate bacterium, enzyme destabilization latex.(2) alkalescence can in latex in because acid that bacterial action produced, increase the negative charge on micelle surface, improve the stability of latex.(3) metallic ion separant ammonia can react with magnesium ion, the phosphate radical in the latex, and it is hungry to generate the minimum magnesium phosphate of solubleness, removes the effect that magnesium ion destroys latex stability.(4) the higher fatty acid reaction that discharges of deflocculant ammonia and lipides generates higher fatty acid money soap, increases the negative charge of micelle.(5) make carbohydrate generate aldehyde ammonia or ketone ammino-complex, thereby suppress the generation of volatile fatty acid or reduce the generating rate of this acid no longer by the bacterial decomposition utilization.
Latex is preserved the ammonia of usefulness in early days, all is ammoniacal liquor.The latex ammonia residual is moderate.Very little, do not reach the purpose of preserving latex; Too much, not only waste ammonia, but also can increase measuring of coagulated latex thereafter with acid.As produce rubber, the ammonia consumption be generally latex heavy 0.05% ~ 0.08%; If produce centrifugal concentrated latex, then the ammonia consumption is controlled at 0.15% ~ 0.35 heavy line of latex usually.Should also be noted that as latex preservative with ammonia.(1) the ammonification time since bacterium and enzyme to latex act on rubber tapping after just begin immediately, so ammonification is more early, preservation effect is good more.(2) ammonia concn adds ammonia process as adopting receipts glue bucket, and ammonia concn with about 10% better.Concentration is too low, means that the water that adds latex is many, and this not only increases the latex freight volume, as produces centrifugal concentrated latex and also can reduce centrifuging efficient.Otherwise ammoniacal liquor is too dense, and the volatilization loss of ammonia is big, 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 does not contact with human body during use.With before to handle with alkalization of sodium carbonate or NaOH and decolouring.
Summary of the invention:
The objective of the invention is non-online non real-time, provide a kind of and can onlinely detect, detect in real time method and the device that ammonia content detects in the elastomer latex to ammon amount detection in the elastomer latex raw material in the commercial production.
For solving the problems of the technologies described above; The technical scheme that the present invention adopts is: liquefied ammonia detection method of content in a kind of elastomer latex; The latex liquid raw material that ammoniacal liquor content is known is inserted in the constant-temperature enclosed teeter chamber, stirs latex liquid, makes liquefied ammonia in the latex liquid evaporate into gaseous state and discharges from the gas outlet of constant-temperature enclosed teeter chamber; Connect gas outlet in the gas outlet; And flow sensor and concentration sensor are set on gas outlet are used to detect ammonia flowing out airborne flow and concentration, obtain overflowing the amount of ammonia by the flow of air and the concentration of ammonia, and then extrapolate the content of the ammoniacal liquor in the 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; Described constant-temperature enclosed teeter chamber is provided with charging aperture, discharging opening and gas outlet; In described constant-temperature enclosed teeter chamber, also be provided with stirring apparatus and heating arrangement; The front end of described gas outlet is the gas outlet, and described ammonia concentration detecting unit is arranged in the described gas outlet and with described control module and is connected, and described ammonia concentration detecting unit comprises flow sensor and concentration sensor.
Be provided with described ammonia flow concentration detecting unit at the import of described gas outlet, the centre of gas outlet and the end of gas outlet.
Principle of work: after liquefied ammonia content in the accurate mensuration raw material; Raw material is put into constant-temperature enclosed teeter chamber from charging aperture carries out heated and stirred, liquefied ammonia since the ammonia that heated volatile becomes gaseous state along with air is discharged from the gas outlet, at the two ends of gas outlet and middle-end detect concentration and the flow that contains the ammonia air; And send the Surveillance center of control module to; Surveillance center's storage data are calculated raffinate ammonia content in the raw material, when liquefied ammonia content satisfies the commercial production demand; Control constant-temperature enclosed teeter chamber and open discharging opening, raw material is delivered to the further work preface.
Advantage of the present invention is: liquefied ammonia content detection system and executive system combined, and liquefied ammonia content in the real-time online continuous detecting elastomer latex raw material, make commercial production efficient improve greatly, the commercial production waste material reduces many.
Description of drawings
Fig. 1 elastomer latex content detection theory diagram.
Embodiment:
Below in conjunction with accompanying drawing the present invention is done further explanation:
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, constant-temperature enclosed teeter chamber 1 is provided with charging aperture 2, discharging opening 3 and gas outlet, in constant-temperature enclosed teeter chamber 1, also is provided with stirring apparatus 5 and heating arrangement 4; The front end of gas outlet is gas outlet 7; The ammonia concentration detecting unit is arranged in the gas outlet and with control module and is connected, and control module ammonia concentration detecting unit comprises flow sensor and concentration sensor, and flow sensor and concentration sensor are arranged on import 9, the centre 10 of gas outlet and export 11; Through ammonia flow concentration detecting unit 6 is set at the gas outlet diverse location simultaneously, through to the analyzing and processing of three detecting unit data such as adopting mean value etc. to improve detection to ammonia concentration.The ammonia detecting sensor is used the 3AM of Britain CITY, and gas flow sensor uses LUGB-N.
Principle of work: after liquefied ammonia content in the accurate mensuration raw material; Raw material is put into constant-temperature enclosed teeter chamber from charging aperture carries out heated and stirred, liquefied ammonia since the ammonia that heated volatile becomes gaseous state along with air is discharged from the gas outlet, at the two ends of gas outlet and middle-end detect concentration and the flow that contains the ammonia air; And send the Surveillance center 8 of control module to; Surveillance center's storage data are calculated raffinate ammonia content in the raw material, when liquefied ammonia content satisfies the commercial production demand; Control constant-temperature enclosed teeter chamber and open discharging opening, raw material is delivered to the further work preface.
Advantage of the present invention is: liquefied ammonia content detection system and executive system combined, and liquefied ammonia content in the real-time online continuous detecting elastomer latex raw material, make commercial production efficient improve greatly, the commercial production waste material reduces many.
Claims (3)
1. liquefied ammonia detection method of content in the elastomer latex; It is characterized in that: the latex liquid raw material that ammoniacal liquor content is known is inserted in the constant-temperature enclosed teeter chamber; Stir latex liquid; Make liquefied ammonia in the latex liquid evaporate into gaseous state and discharge, connect gas outlet in the gas outlet, and flow sensor and concentration sensor are set on gas outlet are used to detect ammonia and are flowing out airborne flow and concentration from the gas outlet of constant-temperature enclosed teeter chamber; Obtain overflowing the amount of ammonia by the flow of air and the concentration of ammonia, and then extrapolate the content of the ammoniacal liquor in the constant-temperature enclosed teeter chamber.
2. pick-up unit that is used for the said a kind of elastomer latex liquefied ammonia detection method of content of claim 1; It is characterized in that: comprise constant-temperature enclosed teeter chamber (1), ammonia flow concentration detecting unit (6) and control module (8); Described constant-temperature enclosed teeter chamber (1) is provided with charging aperture (2), discharging opening (3) and gas outlet; In described constant-temperature enclosed teeter chamber (1), also be provided with stirring apparatus (5) and heating arrangement (4); The front end of described gas outlet is gas outlet (7); Described ammonia concentration detecting unit (6) is arranged in the described gas outlet and with described control module (8) and is connected, and described ammonia concentration detecting unit (6) comprises flow sensor and concentration sensor.
3. liquefied ammonia content detection device in a kind of elastomer latex according to claim 2 is characterized in that: be provided with described ammonia flow concentration detecting unit (6) at the import (9) of described gas outlet, the centre (10) of gas outlet and the end (11) of gas outlet.
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 |
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| 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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| CN102507911A true CN102507911A (en) | 2012-06-20 |
| CN102507911B CN102507911B (en) | 2014-11-19 |
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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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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104729950A (en) * | 2015-02-27 | 2015-06-24 | 杭州市特种设备检测研究院 | Ammonia liquid concentration measurement device |
| CN106990058A (en) * | 2017-05-31 | 2017-07-28 | 南京霍普斯科技有限公司 | The live rapidly and efficiently automatic detection system of liquefied ammonia residue |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000033051A1 (en) * | 1998-11-27 | 2000-06-08 | Neste Chemicals Oy | Method and apparatus for determining 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 |
| CN101059465A (en) * | 2007-06-12 | 2007-10-24 | 北京大学 | 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
- 2011-12-14 CN CN201110417755.8A patent/CN102507911B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000033051A1 (en) * | 1998-11-27 | 2000-06-08 | Neste Chemicals Oy | Method and apparatus for determining 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 |
| CN101059465A (en) * | 2007-06-12 | 2007-10-24 | 北京大学 | 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 |
Non-Patent Citations (2)
| Title |
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| （美）诺勃耳（R.J.NOBLE）著；顾之翰等译: "《胶乳工业>", 30 April 1958, article "胶乳工业", pages: 120 * |
| 陈运进等: "对硫化氢和氨气的在线监测实验研究", 《市政技术》, vol. 26, no. 6, 10 November 2008 (2008-11-10) * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104729950A (en) * | 2015-02-27 | 2015-06-24 | 杭州市特种设备检测研究院 | Ammonia liquid concentration measurement device |
| 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 |
| CN106990058A (en) * | 2017-05-31 | 2017-07-28 | 南京霍普斯科技有限公司 | The live rapidly and efficiently automatic detection system of liquefied ammonia residue |
| 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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| CN102507911B (en) | 2014-11-19 |
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Granted publication date: 20141119 Termination date: 20171214 |