The cause of the failure of the bar-type flowmeter in the differential pressure transmitter is the analysis solution

How much do you know about the eight types of flowmeters? Xiaobian here to introduce you to this product - eight types of flowmeters. At the same time, let's take a look at the common faults that occur when there are differential pressure transmitters in the use of eight types of flowmeters, including what are their solutions? Let me take you to analyze it together.

Eight types of flowmeters belong to differential pressure flowmeters, and their design concept conforms to the principle of Bernoulli's equation. It mainly adopts the differential pressure measurement principle of high and low pressure to measure the pressure difference formed between the upstream dynamic pressure and the downstream static pressure of the fluid, so as to achieve the purpose of measuring flow. The advantages of the eight types of flowmeters are: easy installation, small pressure loss, high strength, and are ideal products that can be used as an alternative to orifice flowmeters.

1. Cause analysis and solution

  1.1 Human Factors

  (1) The production operator misoperated the three-valve group of the differential pressure transmitter, and the balance valve and the positive and negative pressure measuring and taking valve were not properly put into use, resulting in deviations in the measurement. Through the skill training of operators, improve the cognition of the working principle of instruments and meters, and master the operation specifications.

  (2) The auxiliary pressure transmitter of the measuring equipment is closed or there is an air leakage phenomenon, which cannot provide an effective measuring pressure for the integrator, resulting in a deviation in the output.

  1.2 Process factors

  (1) There is a lot of water in the gas well, which causes liquid accumulation at the positive and negative pressure taking end of the transmitter, which affects the actual measurement of the differential pressure transmitter of the average velocity tube flowmeter. The actual operation of a single well is monitored by performing bubble discharge operations on a single well and increasing the number of operations. At the same time, by dealing with the liquid accumulation inside the pressure-taking end of the differential pressure transmitter, it can be correctly put into use again to reduce the influencing factors.

  (2) Serious sand production in gas wells. Under long-term production conditions, the sealing diaphragm of the differential pressure transmitter and the sensor are damaged, the measurement is unstable, and the reliable measurement value cannot be output. Through technical analysis, according to the actual situation of sand production, the original Y-type filter of the process pipeline was transformed into a sand remover, so as to control sand in a single well, and at the same time effectively protect the downstream measurement equipment, and the actual effect of measurement tends to be stability.

  1.3 Equipment Factors

  (1) The differential pressure transmitter is faulty, the sealing diaphragm of the differential pressure transmitter is damaged and the sensor is damaged, and the differential pressure of the equipment cannot be measured normally.

  (2) The gas volume of the gas well is large, and the range value of the differential pressure transmitter is too small, which exceeds the normal detection range, so the measurement remains at the maximum output value of the equipment, which cannot be accurately measured, and is used as a reference monitoring for the actual measurement value.

  (3) Due to the defects of equipment design and poor sealing, water accumulated in the control box of the totalizer, resulting in the failure of the extended output short-circuit module and unable to output normal values.

  (4) The calculation method of the integrator is not suitable for the actual operation of the gas well. The calculation method of the integrator is measured by natural gas components in the factory setting, so there is a large deviation. By comparing the outgoing gas volume of the downstream gas gathering station, after calculation, the measuring medium of the totalizer provided by the original factory for the first phase of the project is changed to general gas, and the deviation will be greatly reduced. The actual metering of the upstream gas well and the outgoing gas volume of the downstream gas gathering station are within the deviation range of the integrator, and the normal flow fluctuation is within 5%.

The above is the analysis solution of the failure cause of the Baclass flowmeter in the differential pressure transmitter. I hope it can help you. Don’t panic when you encounter something. Try the editor’s method first. We have a 24-hour customer service online who can communicate with you and help you solve all your questions.