It is necessary to know that the industrial economy has stabilized and rebounded, and what are the effects and solutions of the gas and fouling of the Coriolis mass flowmeter?

  From the hot words, we can see that the domestic economy has stabilized and rebounded, and the digital economy has developed steadily, which has a good trend for the industrialization of our production factories. The instrumentation industry does not know what trends will continue in the future, and what are the thoughts on the gas and fouling of Coriolis mass flow meters? How is the solution solved? Let's take a look at the details below.

  Oil containing gas, sand and vibrating tube scaling have a great impact on the Coriolis mass flowmeter, which will change the damping ratio and drive gain of the vibrating tube, causing the water content to deviate from the true value, resulting in gas increase oil, sand scale oil reduction Phenomenon.

  1. The influence of gas on Coriolis mass flowmeter and its elimination method

  If the gas content of the mixed liquid is greater than 15%, it can be controlled by installing a gas-liquid separator and a buffer tank. This phenomenon gradually decreases in the old oil area with the increase of comprehensive water cut and the decrease of gas-liquid ratio.

  2. Sensor scaling problems and solutions

  Scaling is a difficult point in crude oil production, storage and transportation. The mixing of oil in flow with two or more incompatible water quality, and changes in thermodynamic and pressure conditions will lead to scaling. Compared with the transfer station with continuous transportation and stable water type, the loading and unloading station is likely to cause scaling of the Coriolis mass flowmeter sensor due to the complex oil water type, the poor viscosity reduction and descaling effect of dosing and other factors.

  (1) Hard scales such as calcium carbonate and magnesium can be solved by soaking in hydrochloric acid. First, use steam or hot water to rinse the oil stains in the double vibrating tube, and then use a soft wire to check whether there is any hard object jamming on the inner wall, and then peel off and collect a small amount of scale samples; configure the corresponding concentration of hydrochloric acid in the laboratory, and observe the reaction effect with the scale samples to determine the concentration of hydrochloric acid , and then block one end of the flange, pour the prepared solution from the other end and add a small amount of scale inhibitor hydrochloric acid. At this time, the reaction is violent and CO2 gas is ejected. Safety protection must be taken during the operation. The MVD junction box is wrapped in a plastic bag. Avoid water. During the period, the consumed hydrochloric acid should be replenished, and the remaining hydrochloric acid should be recovered after observing no reaction, and then rinsed with clean water. The easy way to verify the effect of pickling is to fill the Coriolis mass flowmeter sensor with clean water and connect it to a transmitter such as 3700. It is qualified to show that the instantaneous moisture content is about 100%, and an error of about 0.025% is allowed due to the influence of the ambient temperature.

  (2) If the scale cannot be removed by soaking in hydrochloric acid solution, the content of barium sulfate and strontium sulfate in the scale is determined by X-ray diffractometer > 70%. This sulfate type scaling has a very low solubility product constant, which not only affects the normal use of the Coriolis mass flowmeter, but also affects storage and transportation facilities such as pipes and valves. It must be solved by a professional cleaning company, and only water can be used. Type compatibility and drug screening, rational drug addition and other measures to prevent.

  Now I don’t know if the above editor’s summary is useful to everyone. You must know that problems with the use of flowmeters should be solved as soon as possible. In order to avoid problems that may arise in the future, you are welcome to call Weihai Kunke Flow Meter Co., Ltd. at any time to inquire more For flow meter knowledge, you can also log in to ww.kunkeandao.com/en for details.