Application of Double Flange Differential Pressure Transmitter in Oil-Water Interface Measurement

In petrochemical production, the oil-water interface control is very difficult, and the inability to reasonably control the oil-water interface will affect the smooth running of petrochemical production. The double flange differential pressure transducer can greatly improve the accuracy of the oil-water interface measurement and ensure that petrochemical production operating normally.

The double flange level transmitter is composed of the flange, capillary tube measuring meter head, etc. The flange is the component that implements the connection between the diaphragm level transmitter and the pipeline, connecting the instrument and the process equipment. The diaphragm box part of the flange can implement the pressure measurement.

1. The double flange level transmitter structure and role.

The Double flange diaphragm seal pressure transmitter can installed at any height and position.  Differential pressure level transmitters with double flanges test the pressure difference between the two ends by using a capillary tube to connect the high and low level positions. The measuring head of the differential pressure level transmitter with double flange is an important part of the instrument, and there are several different types, such as electrical connection, circuit board, and LCD head. In the field to display the real-time measurement value is the liquid crystal display dp level transmitter, the level of the data at a glance, and convenient production management.

2. Installation of double-flange capillary level transmitter.

The flange pressure type level meter is designed to prevent the measured fluid corrosion and double flange structure, the application of two flanges for connection, to prevent the medium corrosion or clogging of the measurement line, and improve the measurement accuracy.

The pressure take-off port of the high-pressure chamber of the dp level transmitter needs to be at the same height as the starting liquid level of the container, and there should be no condensed liquid in the pressure guide tube of the low-pressure chamber, only in this way can the accuracy of the measurement be guaranteed. The density of the measured medium must remain constant to achieve the desired measurement effect. The installation location of the double flange differential pressure transducer must be convenient for maintenance management and data observation. Installation must take into account the capillary tube length limitations, not allowed to exceed the use of the length limit. The bending radius of the capillary tube should be more than 50mm, and there should be no extrusion between the flange gasket and the membrane box to avoid affecting the normal measurement and transmission of pressure. Take protective measures for the capillary tube to achieve an adiabatic state, to prevent the deformation of the capillary tube caused by external factors, which will affect the measurement results of the differential pressure. After installation, it is necessary to carry out the commissioning of the double-flange differential pressure transducer before applying it to the measurement.

In addition, if the ambient temperature and humidity can not meet the needs of double flange differential pressure transducer use, it will affect the measurement effect. The intelligent double-flange diaphragm level transmitter has an internal adjustment device, which can compensate for the error. It also can adjust the measuring range to meet the situation of petrochemical production with large changes.

3. Selection and use of double flange dp transmitter.

Select the double flange dp transmitter according to the different places of petrochemical production and determine the model of the diaphragm level transmitter. Determine the type and specification of diaphragm seals need to be based on the environmental conditions of the production site, to avoid excessive temperature and humidity, which affects the use of the instrument.  

In the use of a double flange dp transmitter , if the data of the level meter is big or small, we should analyze the reason in time to ensure the normal use of the dp level transmitter. If there is a zero drift phenomenon, it will also lead to the test data being big or small. It is necessary to check whether there is any blockage in the pressure-guiding system, clean up each pressure-guiding pipeline in time, and ensure that the double flange dp transmitter is in normal use.

Application of double flange dp transmitter  for oil-water interface measurement, the correct choice of the diaphragm level transmitter, its components for inspection and acceptance, and strict implementation of the technical standards for the installation, the correct installation of instrumentation equipment, in the process of practical application, to avoid human error and affect the performance of the instrument. Frequent maintenance of the instrument to ensure that the double flange level transmitter normally works, to achieve the desired measurement effect.

The double flange level transmitter can measure corrosive media and has high sensitivity and stable signal processing functions. It has outstanding use value in the petrochemical industry.