Petroleum product condensation point metering device

Abstract

A metering system of petroleum products solidification point, it is made up of control device, pressure device, oil bottle, measurement transducer, solenoid valve, pressure transducer, temperature transducer and refrigerating plant, of which pressure transducer, oil bottle, measurement transducer and solenoid valve are connected with pipeline compliably, temperature transducer is set in the measurement transducer, control device is connected apart with pressure device, refrigerating plant, solenoid valve, pressure transducer and temperature transducer, in term of the testing process of cooling curve under national standard defined experiment condition. The invention is under anticipative temperature spot of experiment, compressing to oil bottle by pressure device, driving the flow of sample in the pipeline, and confirming the freezing point of sample by testing the change of line pressure, providing the new method of testing petroleum products' freezing point.

Description

technical field [0001] The invention belongs to the field of automatic analysis instruments, in particular to a testing device for the freezing point of petroleum products. Background technique [0002] The current Chinese national standard GB / T510-83 "Petroleum Products Freezing Point Test Method" stipulates the measuring device used and the corresponding measurement operation method. The basic principle is to install the sample in the specified test tube and cool it to the expected temperature. When the temperature is above 100°C, tilt the test tube at 45 degrees and keep it for 1 minute, then vertical the test tube to observe whether the liquid level moves. The test process is briefly described as follows: the test tube containing the sample is fixed in a glass sleeve with a cork, and then placed vertically in a cooling bath. Test the temperature of the sample with a thermometer at any time. When the sample cools to the expected temperature, tilt the test tube at 45 degr...

AI Technical Summary

Problems solved by technology

Due to the large size of the test tube and glass sleeve specified in the standard, the size of the cold bath used is too large, and the required cooling power is also large

At the same time, the prescribed method of determining the freezing point by observing the flow of the liquid surface is not easy to realize the automatic test of the instrument.

[0004] In the actual test operation, we found that the measured freezing point is greatly affected by the cooling conditions during the test, and this test method has high requirements on the operating level of the test personnel, it is troublesome to take and place repeatedly manually, and the human factors of the test personnel are also The precision and accuracy of the test results are affected

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