Error solving method in natural gas measurement

Abstract: The information on error solutions in natural gas measurement is provided by excellent flowmeter and flowmeter manufacturers and quotation manufacturers. Weinan and Shunda manufacturers technical professional introduction Orifice flowmeter is a commonly used measurement method for natural gas flow measurement. In actual production, there will be certain errors in orifice metering due to various factors, but the large error of the measuring instrument will lead to the natural gas orifice meter. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following is the details of the article on error solutions in natural gas measurement. Manufacturer's technical professional introduction orifice flowmeter is a commonly used measurement method for natural gas flow measurement. In actual production, there will be certain errors in orifice metering due to various factors. However, the large error of the metering instrument is the main reason for the high measurement error of the natural gas orifice plate; in the measurement work, the error of the metering instrument has seriously affected the natural gas flow measurement. accuracy. The method of reducing the measurement error of natural gas flow For the orifice plate measurement method, the key to reducing the error of natural gas flow meter is to reduce the error of the metering instrument, and the main reasons for the large error of the metering instrument include the error of the differential pressure transmitter, the temperature sensing difference, Natural gas has four aspects: high water content and low temperature in winter. 1.1 The solution to the error of the differential pressure transmitter (1) Take measures to calibrate the differential pressure transmitter every month by the instrument worker. (2) Take measures to check the differential pressure transmitter every week. The key points of the inspection are: whether the pressure guiding pipe is blocked, corroded, frozen and leaked, and whether the connection between the pressure guiding pipe and the pipeline and the transmitter is not There is a loose seal and there is air leakage. (3) The measure of co-insulating the pressure guiding pipes is taken, so that the two pressure guiding pipes are in the same temperature environment. The purpose is to ensure that the density difference between the two pressure guiding pipes will not be caused by the temperature difference, which will lead to the pressure head error. . The temperature in spring and winter is low, and the pressure guiding tube leaking in the air will cause temperature difference due to factors such as location, wind direction, whether it is facing the sun, and uneven winding of the electric belt, which will lead to the pressure head error and eventually cause the measurement error. After co-insulating the pressure guiding pipes, the two pressure guiding pipes are kept at the same ambient temperature, which reduces the measurement error caused by the temperature difference. 1.2 The solution to the error of the temperature sensor Measures to perform calibration. Because the division value of the thermocouple will change with the time of use and the conditions of use. Therefore, errors caused by instability can be reduced if supervised calibration is performed frequently or periodic calibration is arranged according to actual usage. (2) Measures are taken to separate the thermocouple from the power cable. The thermocouple and the power cable are installed in the same protective tube. Due to the large current of the power cable, a strong electric field will be formed, and a strong magnetic field will also be formed in the bending place. The strong electric field and strong magnetic field will weaken the differential pressure transmitter and temperature sensor. The current signal has an impact, resulting in inaccurate signals and measurement errors. (3) Take measures to regularly clean up the straight pipe section. It not only avoids the interference caused by the loss of thermoelectric potential caused by the poor insulation between the thermoelectric dipole and the tube wall due to excessive impurities in the natural gas, but also avoids the error caused by impurities attached to the thermal resistance and hindering the conduction of heat. . Therefore, the tube wall and the outside of the thermocouple protection tube should be kept clean to reduce temperature sensing differences. 1.3 Solutions for high water content of natural gas (1) Ensure that the water content of the natural gas entering the natural gas pipeline meets the standard from the source, and the incoming gas first enters the separator for dehydration, thereby reducing the water content of the natural gas; Install a venting device at the location (such as the low point of the pipeline), and carry out regular drainage and venting measures; (3) Take measures to add an electric heating belt to the differential pressure flowmeter to increase the temperature of the natural gas, ensure that the gas temperature is above the water dew point, and destroy the natural gas. The formation conditions of the hydrate make the hydrate decompose and not adhere to the orifice plate and the inlet of the impulse pipe, thereby reducing the measurement error and improving the accuracy of natural gas flow measurement. 1.4 The solution to the error caused by low ambient temperature The main reasons for the error caused by the low temperature in winter are: the temperature of the two pressure guiding pipes is different and more natural gas hydrates are formed. Therefore, at the same time when the temperature is low in winter, heating the differential pressure flow meter and using the method common in the natural gas industry can be used to suppress the formation of hydrate with the chemical preparation methanol. Through the above measures, the error of the natural gas flow meter can be effectively reduced, the accuracy of the measurement is ensured, the production management level is improved, and a meaningful exploration and attempt has been made for natural gas management. Flowmeter manufacturers are full of vision for the future, consolidate the foundation, keep pace with the times, operate with integrity, dedicate to the society with first-class products and first-class services, and make contributions to the revitalization of my country's automation instrument industry, our future We will work with you to develop together! We will actively participate in market competition with high-quality products, preferential prices and excellent services,Our company is willing to cooperate sincerely with users from all walks of life at home and abroad, and provide enthusiastic, high-quality and efficient services! The above is the entire content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'Error Solutions in Natural Gas Measurement'

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