Pump delivery issues for acrylic acid
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This post was last edited by Xuexin on 2010-3-15 at 15:56. I am currently working on a project involving the production of water-absorbing resins from acrylic materials. The manufacturer uses bulk acrylic acid; when adding this acid to the neutralization tank, negative pressure is created by using a vacuum pump. However, due to the low flash point of acrylic acid, the optimal storage temperature is 15°C to 25°C. However, the temperature drops during negative pressure transport. Especially in winter, without insulation measures, acrylic itself will freeze. So now, is insulation also needed when using vacuum negative pressure along with acrylic? If insulation measures are to be used, what kind should be adopted? Can a thermal insulation companion pipe be used?
As long as the storage, transportation, and delivery temperatures are below 15 degrees Celsius, acrylic acid must be provided with insulation and heating; unless it is ensured that the acrylic acid remains in a state of flow and that there is not a large temperature difference between the outside environment and the acrylic acid, so that no accumulation of the material occurs, in which case only insulation is sufficient. Otherwise, both insulation and heating are necessary. Rock wool can be used as the insulation material; the thickness of the insulation should be chosen based on the pipe diameter and the ambient temperature. Heating can be provided using hot water; the temperature of this hot water should not be too high, ranging from 35 to 50 degrees. If the temperature is too high, it can cause the local temperature of the acrylic acid to rise excessively, leading to polymerization. Electric heating can also be used. Currently, many acrylic production facilities use electric heating in acrylic pipelines with low flow rates; this method maintains a constant temperature and provides good heating effects. However, using electric heating in large-diameter pipelines is costly.
As long as the storage, transportation, and delivery temperatures are below 15 degrees Celsius, acrylic acid must be provided with insulation and heating; unless it is ensured that the acrylic acid remains in a state of flow and that there is not a large temperature difference between the outside environment and the acrylic acid, so that no accumulation of the material occurs, in which case only insulation is sufficient. Otherwise, both insulation and heating are necessary. Rock wool can be used as the insulation material; the thickness of the insulation should be chosen based on the pipe diameter and the ambient temperature. Heating can be provided using hot water, but the temperature of this water should not be too high – it should range between 35 and 50 degrees. If the temperature is too high, it can cause the local temperature of the acrylic acid to rise to such an extent that polymerization occurs. Electric heating can also be used. Currently, many acrylic production facilities use electric heating in acrylic pipelines with low flow rates; this method maintains a constant temperature and provides good heating effects. However, using electric heating in large-diameter pipelines is costly.