Abstract: discuss how to use scale vortex flowmeter measurement information of coke oven gas produced by excellent flow meter, flow meter manufacturer to offer you the quotation.

Vortex flowmeter can be widely used in large, medium and small various water supply and drainage pipe, industrial circulation, sewage treatment, oil and chemical reagents and compressed air, saturation and superheated steam, gas and all kinds of medium flow rate measurement and can be applied as a flow transmitter.

More flow meter manufacturers choose model price quote you are welcome to inquire, here is a discussion on how to use scale vortex flowmeter measurement of coke oven gas article details.

Vortex flowmeter can be widely used in large, medium and small various water supply and drainage pipe, industrial circulation, sewage treatment, oil and chemical reagents and compressed air, saturation and superheated steam, gas and all kinds of medium flow rate measurement and can be used as flow transducer is applied to automatic control system, the block using EEPROM to power-fail protection of cumulative flow, protection for more than 10 years.

Vortex flowmeter is an extremely versatile flow meter, can be used in almost all gas, liquid and steam flowmeter measurement and control, my company's digital intelligent vortex flowmeter, it breaks through the traditional analog approach to the limits of the vortex signal, through the modern digital signal processing method of vortex sensor signal identification, screening, to get the normal traffic signals, greatly improve the seismic behavior of the vortex street, fundamentally solves the problems surrounding the vortex for decades is not the earthquake, it is widely used in petroleum chemical industry, light industry, thermal power, the papermaking industries such as water supply, to salt, to the wind flow.

Vortex flow meter in the measurement of application on coke oven gas or more, but there are some problems, say the reasons of these problems and the solution: the cause of the field measurement system malfunction can be summarized as two reasons, one is the result of the flow meter or its associated equipment.

Second is a flow meter reasons, namely the flow meter is normal, or fault caused by the system and environment, it is difficult to find this kind of reason.

In addition to the requirements and technical personnel must be familiar with the instrument performance, still need to have a wide range of knowledge and rich experience in the field of analysis, reasoning, various test, in order to confirm.

Some failure or due to some unexpected events.

The fault of the flow meter is often characterized by the output signal is not stable.

According to the practical experience, the vortex street flowmeter measurement of coke oven gas, the output signal is not stable for the following reasons: 1)

Vortex flowmeter is not suitable for installation in strong vibration occasions is widely known as carriers, but in the case of magnetic field changes frequently, vortex flow sensor can measure the signal output of higher than normal.

Practice has proved that in the absence of the gas flow field, when the vortex flow sensor in the change of magnetic field at the instant of the magnetic field changes, vortex flow sensor can sense if a wrong signal and output, when change over, instrument in a steady magnetic field, the instrument will output a normal signal.
2)

Coke oven gas as the factory when the temperature is high, the humidity is big, so the water in the process of gas transmission will exist.

Gas flow reciprocating drive moisture fluctuations, thus forming a pulsating flow.

Vortex flow sensor output data in this fluid state large and small, cannot reflect the status of production.
3)

Due to the impurities of coke oven gas, easy to crystallization, condensation of impurities in the sensing head, causing metering phrase.

At higher temperatures, volatile impurities, increased sensitivity, signal enhancement;
Opposite to reduce.
Resulting in the data is not stable.
4)

Instrument line pressing false wiring process, resulting in intermittent transmission in the process of signal.
5)

Instrument grounding line do not conform to the requirements of the specification, so that the high voltage of 50 hz interference, when the normal signals is higher than the normal output at 50 hz, the opposite will output error signals.
Solution: 1)

In the process of instrument installation, connection, shall ensure the accuracy and correctness of each link, including before installation on the investigation to the scene, the installation process instrumentation wiring, system grounding line, etc. , to ensure that the real data and be able to accurately detected output.
2)

For operation of the measuring system can be used & other;
Dual track measurement, compared to confirm & throughout;
Methods, as well as & other;
Alternative method & throughout;

To identify and eliminate running measuring instrument malfunction.
3)

Regular to overall instrument cleaning, if necessary, can be to purge of sensing head part of the instrument, avoid impurities in the condensation on the top of the sensor.

Cold season in the straight section of measurement and instrument parts and heating device is beneficial to alleviate the impurities in the measuring instrument of condensate.
4)

Straight pipe drainage pipe on a regular basis, especially in front of the water, according to the specific circumstances set specialist emissions on a regular basis, as far as possible reduce the moisture in the metering section, zui big limit ruled out of the fluid pulsation.
5)

Strengthen the management of metering system data, set the timing print function, according to the print data combined with the operation of the production situation of instrument analysis.

Above is all there is in this article, you are welcome to inquire me manufacturer flowmeter selection, quotation, etc.
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Abstract: the scale gas orifice flowmeter calibration and flow control information produced by excellent flow meter, flow meter manufacturer to offer you the quotation.

Mobile car online calibration gas orifice meter 1 to ensure the electric force between two calibration mouth sealing ball valve in the closed state.

2 open the calibration on the blind flange plate of small ball valve, to ensure that the blind flange plate internal pressure.
Then remove the blind flange plate.

More flow meter manufacturers choose model price quote you are welcome to inquire, here is a scale gas orifice flowmeter calibration and flow control article details.

Mobile car online calibration gas orifice meter 1 to ensure the electric force between two calibration mouth sealing ball valve in the closed state.

2 open the calibration on the blind flange plate of small ball valve, to ensure that the blind flange plate internal pressure.
Then remove the blind flange plate.
3 connect the mobile car and calibration mouth good.
4 according to & other;
1 each throughout the use of all the way &;
In step 1.
2, 1.
3, 1.
4, give the main pressurized.

5 closed work road export electric forced sealing ball valves, slowly open the ratio on line forced sealing ball valves, slowly open the main road two calibration forced sealing ball valves.
Do the four work zui is good at the same time.

6 at this point, the gas flows through the skiing in turn within a movement and two gas orifice flowmeter calibration.

After completing online calibration, the calibration of the two Orbit ball valve, slowly open the ratio on line forced sealing ball valves, slowly open the export of electric work road forced sealing ball valves.
Do the four work zui is good at the same time.

8 the blind flange plate back, don't forget to close the blind flange plate of small ball valve.
9 then work way back to work.

Standard before and after the orifice flowmeter has the hand valve, if you want to reduce the flow of flowmeter, flow from 80 to 40, if accurate control flow, is correlation flowmeter flowmeter before hand valve or valve for the cause, is there a difference?

Make the Numbers on the meter is less than the actual flow are two different things, you have to say on the basis of the actual flow meter display value can modify the parameters such as coefficient of value of the flow meter to change, but to reduce the actual flow, of course, is to change the flow meter turn down in front of the valve, regulating valve is mainly based on the straight pipe before and after the case may be, but not necessarily must be after the adjustment, to ensure that there is more than 15 d in front, behind more than 10 d with diameter straight pipe, then made after valve as well and is meaningful.

Flow meter and the flow rate is controlled by valves, of course, is not false, but also not use before and after the flowmeter cut-off valve to control, easy to disrupt the flowmeter flow place to have an impact on measurement accuracy, should use the pump or container export control valve to control, these valves are usually arranged in far from traffic object, so as not to affect each other.

If you have any other questions need to consult, can be directly and my company, the company will have professional staff to answer for you.

Above is all there is in this article, you are welcome to inquire me manufacturer flowmeter selection, quotation, etc.
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Abstract: The information on the causes of signal distortion of differential pressure flowmeters is provided by excellent flowmeter and flowmeter manufacturers. In the installation standard specification of the differential pressure flowmeter, the laying of the impulse pipe and the installation of the instrument are generally only briefly mentioned, that is, the differential pressure signal should not have transmission distortion. In fact, it is very difficult to truly achieve undistorted transmission of differential pressure signals. Have. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following is the details of the article on the causes of signal distortion of differential pressure flowmeters. In the installation standard specification of the differential pressure flowmeter, the laying of the impulse pipe and the installation of the instrument are generally only briefly mentioned, that is, the differential pressure signal should not have transmission distortion. In fact, it is very difficult to truly achieve undistorted transmission of differential pressure signals. Facts prove that: when the differential pressure flowmeter has just stopped, or the valve on the pipeline equipped with the primary device of the differential pressure flowmeter is closed, and confirm that the flow through the flowmeter has dropped to zero, from the specific flow From the reading point of view, there are not many real indications of zero. Among them, the main cause of zero point drift is mostly the distortion in the process of differential pressure transmission. The transmission distortion of the differential pressure signal makes the differential pressure signal received on the differential pressure transmitter not equal to the differential pressure signal generated by the differential pressure flowmeter, thereby causing additional errors. Differential pressure signal transmission distortion includes steady-state value distortion and dynamic distortion. Under the condition of steady flow, there is only steady-state value distortion. Under the condition of pulsating flow, there may be both steady-state value distortion and dynamic distortion. The possible positions and reasons for the distortion of the steady state value are: unreasonable direction of the pressure guiding pipe; improper setting of the shut-off valve; unequal height of the condenser; unequal height of the isolation liquid; The density of the medium is not equal; the three-valve group accumulates fluid, etc. (1) The error caused by the unreasonable direction of the pressure guiding pipe and the improper setting of the shut-off valve is the most easily caused in the differential pressure steam flowmeter, and should be installed in strict accordance with the installation standard specifications. When the equalizing tube differential pressure flowmeter is used to measure the low-pressure gas flow that may precipitate condensate, the needle-shaped shut-off valve set horizontally may cause the condensate to accumulate in the valve and block the gas path, resulting in the distortion of the differential pressure signal. (2) For the error caused by the unequal height of the condensers, the structures of the two condensers on the positive and negative pressure pipes should be symmetrical, and the installation heights should be equal, so that it is possible to make the liquid levels in the two condensers equal, because the difference in liquid level heights is 1mm. A differential pressure distortion of 10Pa will be introduced. However, it is common that the installation heights of the two condensers are not equal at the use site, and some even turn the condenser upside down, which does not function as a condenser at all. One of the positive and negative pressure taking ports of the elbow flowmeter is opened in the outer ring of the elbow, and the other is opened in the inner circle of the elbow. When the diameter of the pipe is large, it is easy to cause the height to be unequal. The signal is inherently small, so the differential pressure signal transmission distortion is not too large in terms of the absolute value of the differential pressure, but the relative error of the flow measurement caused is considerable. (3) The error caused by the unequal height of the isolating liquid level, the isolator in the pressure-improving pipeline is to use the isolating liquid to isolate the corrosive medium from the differential pressure transmitter. When the isolation liquid is just filling the tank, the isolation liquid level of the two isolation containers can be made the same through the balance valve of the three-valve group. However, after a period of operation, due to the leakage of spacer fluid or the wrong opening of the balancing valve during operation, the height of the spacer liquid may be unequal, thereby introducing additional differential pressure and causing distortion of the differential pressure signal. The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'The Cause of Signal Distortion of Differential Pressure Flow Meter'
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Ultrasonic Gas Flow Meters for Natural Gas Custody Transfer

Introduction

The efficient and accurate measurement of natural gas flow is crucial in the energy industry, especially during custody transfer. Traditionally, turbine meters have been used for this purpose, but they are not without limitations. Many industries are now turning to ultrasonic gas flow meters, which offer several advantages over their predecessors. This article explores the use of ultrasonic gas flow meters in natural gas custody transfer, highlighting their benefits, functionality, installation process, calibration procedures, and market availability.

Advantages of Ultrasonic Gas Flow Meters

1. High Accuracy and Precision

Ultrasonic gas flow meters are known for their exceptional accuracy and precision. They employ advanced technology that measures the velocity of gas flow using ultrasonic waves. This ensures reliable and accurate measurements, reducing the risk of errors during custody transfer. With tighter regulations and increased scrutiny on measurement accuracy, ultrasonic gas flow meters provide the necessary reliability sought by energy companies.

2. Non-Intrusive Measurement

Unlike turbine meters, ultrasonic gas flow meters do not require physical contact or intrusions into the gas flow. This non-intrusive measurement method prevents pressure drops, flow disturbances, and potential leaks. It also minimizes maintenance requirements and associated costs. The non-intrusive nature of ultrasonic gas flow meters makes them particularly appealing for custody transfer applications, where uninterrupted flow is essential.

3. Wide Measuring Range

Ultrasonic gas flow meters have a wider measuring range compared to traditional turbine meters. They can accurately measure both low and high flow rates without compromising accuracy or performance. This versatility makes them suitable for a range of natural gas custody transfer scenarios, where the flow rates can vary significantly.

4. Reduced Pressure Drop and Energy Loss

Traditional flow meters, such as turbine meters, often suffer from a significant pressure drop. This can affect the overall efficiency of the system and result in energy loss. Ultrasonic gas flow meters, on the other hand, offer minimal pressure drop, thereby preserving the energy in the gas flow. This advantage can translate into substantial cost savings over time, making ultrasonic gas flow meters an attractive investment for energy companies.

5. Multi-Path Configurations

Ultrasonic gas flow meters come in various configurations, including single path and multi-path designs. Multi-path meters use multiple pairs of transducers to measure gas flow from different directions, resulting in improved accuracy and redundancy. This design allows for efficient custody transfer measurement, ensuring the reliability and consistency of readings from multiple paths.

Functionality of Ultrasonic Gas Flow Meters

Ultrasonic gas flow meters operate based on the principle of time-of-flight measurement. They utilize pairs of transducers strategically placed on the pipe to emit and receive ultrasonic waves. The transit time of these waves is measured to determine the gas flow velocity. By knowing the inner diameter of the pipe, the meter can calculate the volumetric flow rate and provide accurate custody transfer measurements.

Installation Process

The installation of ultrasonic gas flow meters typically involves a few essential steps:

1. Site Survey: Before installation, a thorough site survey is conducted to ensure the suitability and compatibility of the meter for the specific application. Factors such as pipe diameter, material, wall thickness, and available straight pipe runs are assessed.

2. Transducer Mounting: The transducers need to be mounted on the pipe according to the manufacturer's guidelines. Proper alignment and coupling of the transducers are crucial for accurate readings.

3. Signal Wiring: The wiring connections between transducers and the flow meter electronics are established. It is essential to follow the recommended wiring practices for optimal performance.

4. Calibration and Configuration: Once installed, the flow meter requires calibration and configuration to match the specific flow characteristics of the installation site. This step guarantees accuracy and reliability throughout the custody transfer process.

Calibration Procedures

Calibration is a critical aspect of maintaining accurate measurements with ultrasonic gas flow meters. The calibration process includes the following steps:

1. Reference Flow Calibration: The flow meter is calibrated using a reference flow standard, typically a master meter with traceable calibration. The measurements are compared against the reference, and any discrepancies are corrected.

2. Temperature and Pressure Compensation: Ultrasonic gas flow meters should account for changes in both temperature and pressure to obtain accurate readings. Calibration involves determining the necessary adjustments for temperature and pressure compensation.

3. Flow Profile Calibration: Different flow profiles may exist within the pipe, and the meter needs to be calibrated accordingly. By mapping the flow profile within the pipe, the meter can provide accurate measurements for any flow condition.

Market Availability

Ultrasonic gas flow meters for natural gas custody transfer are readily available in the market. Several reputable manufacturers offer a range of models to suit different applications. When selecting a meter, it is essential to consider factors such as accuracy requirements, pipe size compatibility, installation conditions, and compliance with industry standards.

Conclusion

Ultrasonic gas flow meters have gained prominence in the energy industry, particularly for custody transfer applications. Their high accuracy, non-intrusive measurement, wide measuring range, reduced pressure drop, and multi-path configurations make them an optimal choice for ensuring reliable and precise natural gas flow measurement. Through proper installation, calibration, and adherence to industry standards, ultrasonic gas flow meters can significantly enhance custody transfer processes, resulting in improved efficiency and cost savings for energy companies.

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