CN103954519B - Measure the experimental technique of solvent replacement amount needed for polyvinyl acetate in cleaning equipment and pipeline - Google Patents
Measure the experimental technique of solvent replacement amount needed for polyvinyl acetate in cleaning equipment and pipeline Download PDFInfo
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- CN103954519B CN103954519B CN201410146250.6A CN201410146250A CN103954519B CN 103954519 B CN103954519 B CN 103954519B CN 201410146250 A CN201410146250 A CN 201410146250A CN 103954519 B CN103954519 B CN 103954519B
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Abstract
The present invention relates to a kind of experimental technique measuring solvent replacement amount needed for polyvinyl acetate in cleaning equipment and pipeline, mainly solve in prior art and cannot confirm the problem that in pipeline and equipment, whether polyvinyl acetate has cleaned up.The present invention, by adopting a kind of experimental technique measuring solvent replacement amount needed for polyvinyl acetate in cleaning equipment and pipeline, comprises the steps: that polyvinyl acetate loads in test steel pipe E by (1), calculates the amount (m1) of the polyvinyl acetate filled; (2) solvent is poured in test steel pipe E; (3) polyvinyl acetate tested in steel pipe E is constantly out replaced, when the material general assembly (TW) testing steel pipe E and Qi Nei remains unchanged, collect the weight (m2) of mixed liquor in waste liquid tank H, the technical scheme of then rinsing quantity of solvent m0=m2-m1 used solves the problems referred to above preferably, can be used for measuring in the experiment of solvent replacement amount needed for polyvinyl acetate in cleaning equipment and pipeline.
Description
Technical field
The present invention relates to a kind of experimental technique measuring solvent replacement amount needed for polyvinyl acetate in cleaning equipment and pipeline.
Background technology
Can homopolymerization be there is in vinyl acetate (Vinylacetate, VAc), also can with other monomer generation copolyreaction a lot, be one of 50 kinds of industrial chemicals that output is maximum in the world.The synthetic macromolecular compound that vinyl acetate polymerization or copolymerization obtain, vinyl acetate, by producing a series of derivants such as polyvinyl acetate, polyvinyl alcohol (PVA), acetal resin, obtains applying more and more widely in fields such as coating, synthon, leather processing, soil improvements.
The intermediate product polyvinyl acetate of vinyl acetate polymerization is a kind of high viscosity liquid, often can stick together at equipment and inner-walls of duct in process of production, cause equipment to block.Therefore, when workshop appliance overhauls, must use appropriate solvent (methyl alcohol) flushing pipe inwall, cleaning is attached to the polyvinyl acetate of equipment inner wall.
CN200710006958.1 provides a kind of laser gas replacement amount determinator, control device is when vacuumizing gas compartment or carrying out purge, the time interval that interval predetermines, carry out the first mensuration and second by air pressure analyzer to the pressure in gas compartment to measure, according to the first result measured and the second result measured, the laser gas replacement amount of unit interval when obtaining laser generation action.But the mensuration of gas and liquid exists different greatly, because methyl alcohol has certain toxicity, and in flushing process, whether equipment of cannot opening is observed polyvinyl acetate and cleaned up, design experimental provision is therefore needed to carry out simulation measuring and calculating to the quantity of methyl alcohol needed for cleaning equipment.
Summary of the invention
Technical matters to be solved by this invention to confirm the problem whether polyvinyl acetate has cleaned up in prior art, provides the experimental technique of solvent replacement amount needed for polyvinyl acetate in a kind of new measurement cleaning equipment and pipeline.The method, for measuring in the experiment of solvent replacement amount needed for polyvinyl acetate in cleaning equipment and pipeline, has and can calculate and confirm the advantage whether polyvinyl acetate has cleaned up.
For solving the problems of the technologies described above, the technical solution used in the present invention is as follows: a kind of experimental technique measuring solvent replacement amount needed for polyvinyl acetate in cleaning equipment and pipeline, comprises the steps:
(1) polyvinyl acetate of required cleaning is filled in test steel pipe E, and by the amount (m1) calculating the polyvinyl acetate filled of poor quality with test steel pipe E;
(2) open solvent feed pump B, poured in test steel pipe E through pipeline C by solvent, polyvinyl acetate and solvent mixed liquor enter in waste liquid tank H through pipeline G;
(3) constantly adding along with solvent, polyvinyl acetate in test steel pipe E is constantly out replaced, test steel pipe E is full of by solvent, when testing the material general assembly (TW) in steel pipe E and test steel pipe E and remaining unchanged, be the terminal of solvent replacement amount needed for polyvinyl acetate in cleaning equipment and pipeline, collect the mixed liquor of the polyvinyl acetate in waste liquid tank H and solvent, claim rinse the weight (m2) of mixed liquor afterwards, then rinse quantity of solvent m0=m2-m1 used.
In technique scheme, preferably, described solvent is methyl alcohol.
In technique scheme, preferably, the quality of described test steel pipe E and inside stuffing matter adopts on-line real-time measuremen.
In technique scheme, preferably, the amount (m1) of the polyvinyl acetate filled is for filling the amount needed for full test steel pipe E.
In the present invention, in described solvent replacement amount and equipment and pipeline polyvinyl acetate amount relationship experiments will on the polyvinyl acetate of different densities, different polymerization degree and unlike material, different size test steel pipe on carry out many experiments after improve guide data targetedly.
The present invention utilizes the experimental provision of different inner diameters and length to carry out experimental simulation to device context situation according to a certain percentage, thus be used for calculating the quantity of solvent in complete cleaning equipment required for polyvinyl acetate, effectively analog field device can scene can also calculate the minimum quantity of solvent needed for rinsing, for field apparatus maintenance clean-out operation regulates solvent use amount to provide foundation, thus reach the quantity of solvent of saving and using in cleaning process, the object saved production cost, achieves good technique effect.
Accompanying drawing explanation
Fig. 1 is the structural representation of device of the present invention.
A is solvent tank; B is solvent feed pump; C is feeding line; D is the joint flange of test steel pipe E and feeding line C; E is test steel pipe; F is the joint flange of test steel pipe E and discharging pipeline G; G discharging pipeline; H is waste liquid tank.
Below by embodiment, the invention will be further elaborated, but be not limited only to the present embodiment.
Embodiment
[embodiment 1]
On device as shown in Figure 1, solvent adopts methyl alcohol, and test steel pipe E is 304 stainless steels, long 1.5m, diameter 0.05m, is then 241.78kg/m by the density of required cleaning
3, low viscous polyvinyl acetate fills in steel pipe, fill up steel pipe, and by the amount m1 calculating the polyvinyl acetate of interpolation of poor quality with steel pipe, be 2.847kg.Then opening plunger feeder pump B, methyl alcohol in solvent tank A is poured in test steel pipe E, polyvinyl acetate and methyl alcohol mixed liquor enter in waste liquid tank H after pipeline G, along with constantly adding of methyl alcohol, in test steel pipe E, polyvinyl acetate is all out replaced, and test steel pipe E is full of (calculating by quality) by methyl alcohol, the polyvinyl acetate in collection waste liquid tank H and the mixed liquor of methyl alcohol, claim rinse after the weight m2 of potpourri, be 10.9589kg.
Rinse quantity of methyl alcohol m0=m2-m1=8.1119kg used.
The mass ratio of polyvinyl acetate in quantity of methyl alcohol used and device can be drawn thus, thus amplify reckoning in commercial plant.
Claims (4)
1. measure a method for solvent replacement amount needed for polyvinyl acetate in cleaning equipment and pipeline, comprise the steps:
(1) polyvinyl acetate of required cleaning is filled in test steel pipe E, and by the amount m1 calculating the polyvinyl acetate filled of poor quality with test steel pipe E;
(2) open solvent feed pump B, poured in test steel pipe E through pipeline C by solvent, polyvinyl acetate and solvent mixed liquor enter in waste liquid tank H through pipeline G;
(3) constantly adding along with solvent, polyvinyl acetate in test steel pipe E is constantly out replaced, test steel pipe E is full of by solvent, when testing the material general assembly (TW) in steel pipe E and test steel pipe E and remaining unchanged, be the terminal of solvent replacement amount needed for polyvinyl acetate in cleaning equipment and pipeline, collect the mixed liquor of the polyvinyl acetate in waste liquid tank H and solvent, claim rinse the weight m2 of mixed liquor afterwards, then rinse quantity of solvent m0=m2-m1 used.
2. measure the method for solvent replacement amount needed for polyvinyl acetate in cleaning equipment and pipeline according to claim 1, it is characterized in that described solvent is methyl alcohol.
3. measure the method for solvent replacement amount needed for polyvinyl acetate in cleaning equipment and pipeline according to claim 1, it is characterized in that the quality of described test steel pipe E and inside stuffing matter adopts on-line real-time measuremen.
4. measuring the method for solvent replacement amount needed for polyvinyl acetate in cleaning equipment and pipeline according to claim 1, it is characterized in that the amount m1 of the polyvinyl acetate filled is for filling the amount needed for full test steel pipe E.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410146250.6A CN103954519B (en) | 2014-04-11 | 2014-04-11 | Measure the experimental technique of solvent replacement amount needed for polyvinyl acetate in cleaning equipment and pipeline |
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| CN201410146250.6A CN103954519B (en) | 2014-04-11 | 2014-04-11 | Measure the experimental technique of solvent replacement amount needed for polyvinyl acetate in cleaning equipment and pipeline |
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| CN103954519A CN103954519A (en) | 2014-07-30 |
| CN103954519B true CN103954519B (en) | 2016-02-17 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1773247A (en) * | 2005-10-18 | 2006-05-17 | 河海大学 | Method for measuring material critical non-corrosion air concentration value |
| JP4038225B2 (en) * | 2006-02-02 | 2008-01-23 | ファナック株式会社 | Gas laser oscillator and method for measuring laser gas replacement amount |
| CN101246105A (en) * | 2008-01-16 | 2008-08-20 | 东北电力大学 | Method and device for measuring anti-dirty performance of material surface based on weight method |
| CN102645388B (en) * | 2012-03-27 | 2013-10-02 | 宜宾北方川安化工有限公司 | Method for measuring content of mixed ester in nitro paint cloth |
| CN103592201B (en) * | 2013-10-18 | 2015-12-02 | 中国农业大学 | Measure volume displacement method and the equipment of soil bulk density |
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