What is the reason for inaccurate measurement of gas turbine flowmeter?
2024-05-22
What is the reason for inaccurate measurement of gas turbine flow meter?
(1) The liquid in the gas turbine flowmeter tube is not filled, because the back pressure is insufficient or the flow through the sensor can be installed in a position to produce bad, so that it can measure the liquid management in the tube can not develop full, and the fault phenomenon has different student performance due to the lack of full education and the status of current assets. MY type is an analog liquid level transmitter, which is composed of two parts: liquid level sensor and signal converter. The liquid level sensor is composed of a number of reed tubes and a number of resistors installed in a φ20 stainless steel sheath, which is fastened to the outer side of the measuring tube (main tube); The signal converter is composed of an electronic module, which is placed in the explosion-proof junction box at the top or bottom of the sensor. 2, error: ±10mm; 3, output signal: 4 ~ 20mA.DC (two-wire system); 4, load resistance: ≤550Ω; 5, power supply voltage: 24V.DC; 6. Outlet: M20×1.5 (inside); 7, ambient temperature: -40 ~ +60℃; 8, explosion-proof grade: dⅡBT1-4; 9, shell protection grade: IP65. Flowmeter defines it as an instrument that indicates the measured flow rate and/or the total amount of fluid at a selected time interval. Simply put, it is an instrument used to measure the flow of fluid in a pipe or open channel. Vortex flowmeter A volumetric flowmeter designed to measure the volume flow rate of gas, steam or liquid, volume flow rate of a standard condition or mass flow rate. It is mainly used for the flow measurement of industrial pipeline medium fluids, such as gas, liquid, steam and other media. If a small amount of gas is stratified flow or wave flow in the water pipe, the fault analysis phenomenon shows that a certain error is increasing, that is, the measured flow value is inconsistent with the actual value. If the flow is bubble flow or plug flow, the fault phenomenon not only does not match the measured value with the actual value, but also causes the information output to shake because the gas phase covers the surface of the electrode material instantaneously. If the level of the pipeline is raised and the gas phase part of the flow cross-sectional area is increased, that is, the degree of liquid filling pipe is gradually increased, the data output will also wobble. If the situation of liquid filling pipe is more serious, so that the liquid level is below the electrode, the output overfull phenomenon will occur.
(2) The liquid contains a solid phase, the liquid contains solids such as powder, particles or fibers, which may cause faults; ① slurry noise; ② The electrode surface is contaminated; (3) The electrode or lining is covered by a conductive or insulating deposit layer; ④ The lining is worn or covered by sediment, and the circulation cross-sectional area is reduced.
(3) Liquid crystal may, in the gas turbine flowmeter should be used with caution, crystallization is usually measured in the case of normal temperature of certain chemical materials, because the fluid delivery conduit has good heating insulation, insulation does not work when crystallization, but measurement and insulation is difficult electromagnetic flow sensor tube implementation, and therefore, fluid flow through the measuring tube is easy, A solid layer on the inner wall of the junction caused by the cooling. Since the flow meter uses other principles that also have crystallization problems, it is better in no other method to "ring" the measuring tube to a very short length (or gate) of the electromagnetic flow sensor, the choice of the flow meter and upstream pipe with insulation is enhanced. In the connection method of the tube, it is considered to disassemble and facilitate the flow sensor, which can be easily removed for maintenance in the case of crystallization.
(4) The selection of electrode and ground ring material caused by improper use of problems caused by network failure caused by the mismatch between the material and the measured medium, the gas turbine flowmeter has electrodes and ground rings in direct contact with the medium, and the mismatch is in addition to corrosion resistance problems, as long as it is through the surface structure effect of the electrode material. The surface treatment effect is due to: ① chemical substance reaction (the surface can form blunt film, etc.); ② Electrochemistry and polarization (generating potential); ③ Catalytic action (electrode surface information to generate aerosol, etc.). Grounding rings also have our economic effects, but the impact is much smaller.
If you want to know more about the flow meter or flow meter selection, please consult the Aister flow meter manufacturer email: sales@aistermeter.com for help.
(1) The liquid in the gas turbine flowmeter tube is not filled, because the back pressure is insufficient or the flow through the sensor can be installed in a position to produce bad, so that it can measure the liquid management in the tube can not develop full, and the fault phenomenon has different student performance due to the lack of full education and the status of current assets. MY type is an analog liquid level transmitter, which is composed of two parts: liquid level sensor and signal converter. The liquid level sensor is composed of a number of reed tubes and a number of resistors installed in a φ20 stainless steel sheath, which is fastened to the outer side of the measuring tube (main tube); The signal converter is composed of an electronic module, which is placed in the explosion-proof junction box at the top or bottom of the sensor. 2, error: ±10mm; 3, output signal: 4 ~ 20mA.DC (two-wire system); 4, load resistance: ≤550Ω; 5, power supply voltage: 24V.DC; 6. Outlet: M20×1.5 (inside); 7, ambient temperature: -40 ~ +60℃; 8, explosion-proof grade: dⅡBT1-4; 9, shell protection grade: IP65. Flowmeter defines it as an instrument that indicates the measured flow rate and/or the total amount of fluid at a selected time interval. Simply put, it is an instrument used to measure the flow of fluid in a pipe or open channel. Vortex flowmeter A volumetric flowmeter designed to measure the volume flow rate of gas, steam or liquid, volume flow rate of a standard condition or mass flow rate. It is mainly used for the flow measurement of industrial pipeline medium fluids, such as gas, liquid, steam and other media. If a small amount of gas is stratified flow or wave flow in the water pipe, the fault analysis phenomenon shows that a certain error is increasing, that is, the measured flow value is inconsistent with the actual value. If the flow is bubble flow or plug flow, the fault phenomenon not only does not match the measured value with the actual value, but also causes the information output to shake because the gas phase covers the surface of the electrode material instantaneously. If the level of the pipeline is raised and the gas phase part of the flow cross-sectional area is increased, that is, the degree of liquid filling pipe is gradually increased, the data output will also wobble. If the situation of liquid filling pipe is more serious, so that the liquid level is below the electrode, the output overfull phenomenon will occur.
(2) The liquid contains a solid phase, the liquid contains solids such as powder, particles or fibers, which may cause faults; ① slurry noise; ② The electrode surface is contaminated; (3) The electrode or lining is covered by a conductive or insulating deposit layer; ④ The lining is worn or covered by sediment, and the circulation cross-sectional area is reduced.
(3) Liquid crystal may, in the gas turbine flowmeter should be used with caution, crystallization is usually measured in the case of normal temperature of certain chemical materials, because the fluid delivery conduit has good heating insulation, insulation does not work when crystallization, but measurement and insulation is difficult electromagnetic flow sensor tube implementation, and therefore, fluid flow through the measuring tube is easy, A solid layer on the inner wall of the junction caused by the cooling. Since the flow meter uses other principles that also have crystallization problems, it is better in no other method to "ring" the measuring tube to a very short length (or gate) of the electromagnetic flow sensor, the choice of the flow meter and upstream pipe with insulation is enhanced. In the connection method of the tube, it is considered to disassemble and facilitate the flow sensor, which can be easily removed for maintenance in the case of crystallization.
(4) The selection of electrode and ground ring material caused by improper use of problems caused by network failure caused by the mismatch between the material and the measured medium, the gas turbine flowmeter has electrodes and ground rings in direct contact with the medium, and the mismatch is in addition to corrosion resistance problems, as long as it is through the surface structure effect of the electrode material. The surface treatment effect is due to: ① chemical substance reaction (the surface can form blunt film, etc.); ② Electrochemistry and polarization (generating potential); ③ Catalytic action (electrode surface information to generate aerosol, etc.). Grounding rings also have our economic effects, but the impact is much smaller.
If you want to know more about the flow meter or flow meter selection, please consult the Aister flow meter manufacturer email: sales@aistermeter.com for help.
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