Ammonia Flow Meter
2024-07-23
1. Fluid characteristics analysis
Ammonia is a corrosive liquid, so its adaptability to the material needs to be considered in the selection of flow timing. In addition, the temperature, pressure, viscosity and other characteristics of ammonia should also be analyzed to ensure that the selected flowmeter can accurately measure the flow rate of ammonia and run stably for a long time.
2. Type of flow meter
Ammonia flowmeter is mainly divided into the following types:
1) Differential pressure flow meter: such as orifice flowmeter, venturi flowmeter, etc., by measuring the differential pressure generated by the fluid through the throttling device to calculate the flow.
2) Rotameter: The principle of balancing the buoyancy of the rotor in the fluid and the resistance of the fluid to the rotor is used to measure flow.
3) Electromagnetic flow meter: Based on Faraday's law of electromagnetic induction to measure the flow of conductive liquid.
4) Vortex flow meter: Use the vortex signal generated by the fluid on both sides of the vortex generator to measure the flow rate.
5) Mass flow meter: The instrument that directly measures the mass flow rate of the fluid, which is not affected by changes in fluid temperature, pressure and density.
3. Instrument material selection
Because ammonia is corrosive, the material selection should consider the corrosion of ammonia, temperature, pressure and other factors. Usually choose corrosion resistant, temperature resistant, pressure resistant materials, such as stainless steel, polytetrafluoroethylene (PTFE) and so on. When selecting materials, it is also necessary to consider factors such as strength and wear resistance.
4. Determine the traffic range
When selecting the ammonia flow meter, you first need to determine the expected flow range. This will help to select the right flowmeter model and specification to ensure that the flowmeter can accurately measure the flow of ammonia water within the normal operating range.
5. Instrument accuracy requirements
According to the actual needs, determine the accuracy requirements of the flowmeter. The measurement accuracy of ammonia flow is of great significance for process control and economic accounting, so it is necessary to select flowmeters that can meet the accuracy requirements.
6. Signal output requirements
According to the need to choose the appropriate signal output mode, such as analog signal or digital signal. In addition, factors such as the distance and stability of the signal transmission should also be considered to ensure the accuracy and reliability of the measurement results.
7. Pipeline condition assessment
When selecting the ammonia flow meter, it is necessary to evaluate the conditions of the pipeline, including pipe diameter, flow rate, flow direction and other factors. This will help to select the right flowmeter type and installation position to ensure the accuracy of the measurement results.
8. Environmental considerations
Environmental factors such as temperature, humidity, electromagnetic interference, etc., may affect the performance of the flowmeter. When choosing an ammonia flow meter, you need to consider these factors and choose a flowmeter that can adapt to harsh environments.
9. Installation requirements
The installation position of the flowmeter should meet the following requirements:
1) The installation position should be straight pipe section to avoid the impact of local resistance parts such as elbows and valves on flow measurement.
2) When installing, it should be ensured that the upstream and downstream of the flowmeter have sufficient straight pipe length to reduce fluid disturbance.
3) The flow meter should be installed horizontally to reduce the impact of the fluid on the measuring element.
10. Calibration method
There are two main calibration methods: real flow calibration and dry calibration. The real flow calibration is to calibrate the flowmeter in the actual fluid environment, and the result is more accurate. Dry calibration is the calibration of the flow meter in the absence of fluid and is suitable for the calibration of the flow meter before disassembly or initial installation.
11. Use and maintenance
Usage and maintenance mainly include the following aspects:
1) Check the working status of the flowmeter regularly to ensure its normal operation.
2) Clean the flow meter regularly to avoid impurities and scale in the fluid affecting the measurement.
3) Periodically calibrate the flowmeter to ensure its measurement accuracy.
4) Regularly check the tightness of the flow meter and whether the connector is tight to avoid leakage.
12. Safety regulations
Safety specifications mainly include the following aspects:
1) In the process of operation and maintenance, the relevant safety operation procedures should be observed to avoid safety accidents.
2) When handling corrosive liquids such as ammonia, wear protective glasses, gloves and other protective equipment to avoid direct contact.
3) During the installation and disassembly flow timing, it should be ensured that there is no pressure and appropriate temperature in the pipeline to avoid accidents.
4) When dealing with the fault or maintenance, the corresponding valve should be closed first to cut off the fluid to ensure safety.
To sum up, in the selection of ammonia flow timing, it is necessary to consider the flow range, fluid characteristics, pipeline conditions, instrument accuracy, environmental factors, instrument material, signal output, maintenance and calibration. Through reasonable selection and considerations, it can be ensured that the selected ammonia flow meter can meet the actual needs, and achieve long-term stable operation and accurate measurement.
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.
Ammonia is a corrosive liquid, so its adaptability to the material needs to be considered in the selection of flow timing. In addition, the temperature, pressure, viscosity and other characteristics of ammonia should also be analyzed to ensure that the selected flowmeter can accurately measure the flow rate of ammonia and run stably for a long time.
2. Type of flow meter
Ammonia flowmeter is mainly divided into the following types:
1) Differential pressure flow meter: such as orifice flowmeter, venturi flowmeter, etc., by measuring the differential pressure generated by the fluid through the throttling device to calculate the flow.
2) Rotameter: The principle of balancing the buoyancy of the rotor in the fluid and the resistance of the fluid to the rotor is used to measure flow.
3) Electromagnetic flow meter: Based on Faraday's law of electromagnetic induction to measure the flow of conductive liquid.
4) Vortex flow meter: Use the vortex signal generated by the fluid on both sides of the vortex generator to measure the flow rate.
5) Mass flow meter: The instrument that directly measures the mass flow rate of the fluid, which is not affected by changes in fluid temperature, pressure and density.
3. Instrument material selection
Because ammonia is corrosive, the material selection should consider the corrosion of ammonia, temperature, pressure and other factors. Usually choose corrosion resistant, temperature resistant, pressure resistant materials, such as stainless steel, polytetrafluoroethylene (PTFE) and so on. When selecting materials, it is also necessary to consider factors such as strength and wear resistance.
4. Determine the traffic range
When selecting the ammonia flow meter, you first need to determine the expected flow range. This will help to select the right flowmeter model and specification to ensure that the flowmeter can accurately measure the flow of ammonia water within the normal operating range.
5. Instrument accuracy requirements
According to the actual needs, determine the accuracy requirements of the flowmeter. The measurement accuracy of ammonia flow is of great significance for process control and economic accounting, so it is necessary to select flowmeters that can meet the accuracy requirements.
6. Signal output requirements
According to the need to choose the appropriate signal output mode, such as analog signal or digital signal. In addition, factors such as the distance and stability of the signal transmission should also be considered to ensure the accuracy and reliability of the measurement results.
7. Pipeline condition assessment
When selecting the ammonia flow meter, it is necessary to evaluate the conditions of the pipeline, including pipe diameter, flow rate, flow direction and other factors. This will help to select the right flowmeter type and installation position to ensure the accuracy of the measurement results.
8. Environmental considerations
Environmental factors such as temperature, humidity, electromagnetic interference, etc., may affect the performance of the flowmeter. When choosing an ammonia flow meter, you need to consider these factors and choose a flowmeter that can adapt to harsh environments.
9. Installation requirements
The installation position of the flowmeter should meet the following requirements:
1) The installation position should be straight pipe section to avoid the impact of local resistance parts such as elbows and valves on flow measurement.
2) When installing, it should be ensured that the upstream and downstream of the flowmeter have sufficient straight pipe length to reduce fluid disturbance.
3) The flow meter should be installed horizontally to reduce the impact of the fluid on the measuring element.
10. Calibration method
There are two main calibration methods: real flow calibration and dry calibration. The real flow calibration is to calibrate the flowmeter in the actual fluid environment, and the result is more accurate. Dry calibration is the calibration of the flow meter in the absence of fluid and is suitable for the calibration of the flow meter before disassembly or initial installation.
11. Use and maintenance
Usage and maintenance mainly include the following aspects:
1) Check the working status of the flowmeter regularly to ensure its normal operation.
2) Clean the flow meter regularly to avoid impurities and scale in the fluid affecting the measurement.
3) Periodically calibrate the flowmeter to ensure its measurement accuracy.
4) Regularly check the tightness of the flow meter and whether the connector is tight to avoid leakage.
12. Safety regulations
Safety specifications mainly include the following aspects:
1) In the process of operation and maintenance, the relevant safety operation procedures should be observed to avoid safety accidents.
2) When handling corrosive liquids such as ammonia, wear protective glasses, gloves and other protective equipment to avoid direct contact.
3) During the installation and disassembly flow timing, it should be ensured that there is no pressure and appropriate temperature in the pipeline to avoid accidents.
4) When dealing with the fault or maintenance, the corresponding valve should be closed first to cut off the fluid to ensure safety.
To sum up, in the selection of ammonia flow timing, it is necessary to consider the flow range, fluid characteristics, pipeline conditions, instrument accuracy, environmental factors, instrument material, signal output, maintenance and calibration. Through reasonable selection and considerations, it can be ensured that the selected ammonia flow meter can meet the actual needs, and achieve long-term stable operation and accurate measurement.
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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