Abstract: the temperature factors affecting crude oil flow meter
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Crude oil flowmeter
metering error reasons there are a lot of literature for crude oil flow meter error causes made its own analysis, the main reason is due to the measurement of properties of the oil and crude oil flow meter calibration used liquid properties vary greatly, with.
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Crude oil flowmeter metering error reasons there are a lot of literature for crude oil flow meter error causes made its own analysis, the main reason is due to the measurement of properties of the oil and crude oil flow meter calibration used liquid properties vary greatly, at the same time, the temperature of the external environment affects the measurement precision of flowmeter.
Jing tang oil space transmission and measurement of product variety, product physical properties especially the viscosity varies widely, viscosity have more influence on measurement accuracy.
And the heavy oil in the oil task, oil switch is frequent, too late for calibration every kind of product.
Therefore, the current two times after the measurement of oil properties vary widely, or a larger ambient temperature changes, appeared a lot of crude oil flowmeter measurement error.
Because the oil flowmeter is only in the product conversion and environment temperature change is big, will appear a lot of measurement error, therefore, in such a short time period, inside is never to appear similar wax crude oil flowmeter that need long time to conclude adhesion in the case of the lining.
Through the experiment, this paper selected typical oil, oil viscosity and temperature, two factors are two kinds of factors on the influence of crude oil flow meter measuring accuracy.
1, experiment method.
1 experiment content to establish a set of indoor ring, simulated field flowmeter metering of crude oil product process.
Control the oil temperature and environmental temperature of crude oil flowmeter, flowmeter metering of crude oil in the oil flow under different oil moderate temperature, and compared with the standard flow meter readings.
Adopt the method of multi-factor analysis of variance in statistical, the oil viscosity and temperature two factor analysis of variance, and the oil viscosity and the effect of environmental temperature for crude oil flowmeter measurement error.
Zui after in the oil metering of main factors affecting the measurement results, and gives countermeasures.
Product 2 to choose this transport has a variety of crude oil, oil space properties vary widely, mainly has the following kinds: jeno's, prue Tony, cabinda, ace sid, black lion, Mr Ji, bohai sea south, mans, Oman, the sand, the urals, honor more gently, and so on.
Laboratory experiments, through the comparison of properties of crude oil, choose appropriate experiment, representative of the crude oil.
After the above each kind of product, five kinds of oil (
Mans are light, Oman, sand, the urals, honor card)
The related points between 15 ~ 20 ℃, solidifying point in -
Below 5 ℃, low condensation point;
Black lion, mann, bohai sea south, the three kinds of oil solidifying point between 15 ~ 30 ℃, high solidifying point, generally easy to condensate pipe accidents;
Jeno's, prue Tony, cabinda, ace sid, the analysis of four types of crude oil wax point between 25 ~ 30 ℃, solidifying point are around 10 ℃.
To meet the requirements of the experiment, have sufficient comparative to different properties of crude oil, with a greater difference between two properties prue Tony light crude oil and sand as experimental oil experiment.
The experiment of the oil used some physical parameters such as table 1.
Viscosity of oil solidifying point ℃ / 5 ℃ / Pa·
S related point light < / ℃ sand - 200.
013 < 10 prue Tony 100.
Three experimental device and test method for (
Experiment device is shown in figure 1 is the ring of the flow diagram, each part of the device is shown in figure 1.
To simulate the process of oil, with thermal resistance and heat exchange tube cooling oil temperature adjustment, through the constant temperature control device for regulating temperature experiment of crude oil flow meter.
Through the booster pump speed, the circuit and the valve 1, 2, and 3 control valve valve pipe flow speed.
Experiment process control oil flow rate and temperature, record and contrast experiments of crude oil flowmeter standard meter readings.
Test method first USES the experiment selected prue Tony a representative product, through the temperature control, compared to oil temperature and flow meter of the influence of environment temperature on the measurement.
Experimental method is as follows: will be plenty of prue Tony oil in oil tank, oil pump and open make it full of the whole ring.
Open the heating resistance and agitator, by thermocouple temperature control system, such as relays or keep using standard flow meter of oil temperature above the wax precipitation point and constant temperature.
By maintaining a standard room temperature control, flow meter of ambient temperature to maintain high temperature constant.
Open cooling device, by cooling high temperature heat exchange tube of crude oil fell to the experiment temperature, then through the experiment of crude oil flow meter.
Open the constant temperature water bath at the same time, control temperature experiment of crude oil flow meter.
, through the control of standard flowmeter by oil moderate temperature constant, moderate temperature experiment of crude oil flow meter by oil can be adjusted according to the requirements.
After a period of steady operation, record the accumulated flow, according to two meter and two meter by moderate oil temperature environment.
Will experiment light crude oil replacement for sand, sand in the same way to measure light crude oil in different environment temperature moderate oil flowmeter measurement error, the experimental method.
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