How to calibrate the flue gas ultrasonic flow meter?

Zero calibration 2, span calibration 3, full-scale calibration.

2. Description of three calibration points.

Zero calibration refers to the calibration of the instrument working at the zero point.

Span calibration refers to the calibration of the instrument between 50 and 100% of the range.

Full-scale calibration refers to calibration at 100% of the range.

3. The operation method of calibration.

There are some differences in equipment calibration operation methods of different manufacturers, taking UF200 flue gas ultrasonic flow meter as an example.

Zero point calibration, select the calibration in the operation interface, enter the zero point calibration, start the automatic zero point calibration state, and end the zero point process in 150 seconds.

Span calibration, select the calibration in the operation interface, enter the span calibration, start the automatic span calibration state, and end the span process in 150 seconds.

Full-scale calibration, select calibration in the operation interface, enter full-scale calibration, start automatic full-scale calibration, and end the full-scale process in 150 seconds.

There are some differences in the calibration methods of different models, taking UF200 as an example

3. Factory calibration and real flow calibration.

What is a flue gas ultrasonic flow rate monitor? Flue gas ultrasonic velocity meter is an instrument used to measure the flow rate of chimney or flue gas. In general, in the case of mu source, flue gas ultrasonic flow meter is a special equipment for gas ultrasonic flow meter.

The gas ultrasonic flowmeter or flowmeter we often refer to the pipeline ultrasonic flowmeter used to measure the flow rate of natural gas pipelines. The ultrasonic velocity meter also includes a way to refer to the flow rate of rivers and water pipes, which is specifically for measuring liquids and is very different from measuring gases. The ultrasonic velocity meter of flue gas Li Hall is a new generation of flue gas velocity meter, and the measurement principle of flue gas ultrasonic velocity meter is the time difference method, because the measurement of flue gas ultrasonic velocity meter has good accuracy, high reliability, and minimal maintenance, it can basically achieve maintenance-free, and there is no throttling parts.

At present, there are more and more applications in the market.

Flue gas ultrasonic velocity meter is an instrument for measuring flue gas flow or flue gas velocity, which is generally used in CEMS systems.

It can also be used to measure flue gas flow in a dry desulfurization process.

Ultrasonic flue gas flowmeter is an instrument used to measure the flue gas flow rate of large diameter and large cross-section.

The principle is generally jet-of-flight ultrasound. The general installation method is a cross-wearing type.

The specific structure is composed of ultrasonic host, upstream transducer, downstream transducer and auxiliary cable.

Ultrasonic flue gas flowmeter is different from ultrasonic flowmeter in the general sense, usually referred to as ultrasonic flowmeter refers to an instrument that measures liquid, sewage, water and other liquid media.

If the flue gas flow is to be measured, an ultrasonic flue gas flow meter is required.

Ultrasonic flue gas flowmeter is a differential pressure flowmeter that uses the pitot tube principle to extract the fluid flow rate (full pressure-hydrostatic pressure) and then convert it into fluid volume flow rate and mass flow rate.

The ultrasonic flow meter can be used to measure the flue gas flow rate in the flue, but it cannot be used to measure the liquid ultrasonic flow meter, nor can it be used to measure the pipeline natural gas, and it is necessary to use a special flue gas ultrasonic flow meter, and the installation method is oblique through installation, such as UF200 flue gas ultrasonic flow meter.

Measurement of gas flow rate by measuring the time difference of ultrasonic transmission; The transmitter and receiver are installed on both sides of the flue and at an angle to the direction of the gas flow. The transmitter and receiver device includes a piezoelectric ultrasonic generator and a receiver. The greater the difference in the ultrasonic transmission time, the faster the gas flows.

Founded in December 2014, Xinghong Solid Waste Treatment and Disposal of Huzhou City, Zhejiang Province is an environmental protection company that disposes of medical waste and hazardous waste.

Huzhou Xinghong Company is equipped with 3 waste disposal production lines, of which 1 production line is a medical waste disposal production line, and the main body of waste disposal is medical waste, animal carcasses, etc.

The production process is a rotary kiln incinerator, the tail flue gas treatment process is alkali desulfurization and denitrification process, and the particulate matter treatment is a bag filter. Its flue gas components include SO2, NOX, particulate matter, HCl, H2S, dioxin, NH3 and other gases. Its flue gas discharge temperature is 100 degrees, and it is characterized by high temperature, high humidity, high viscosity, high corrosiveness, and low flow rate gas.

Its CEMS system is installed on a 20-metre-high platform at the exhaust port.

For a long time, due to the characteristics of high temperature, high humidity, high corrosion, strong viscous gas and low flow rate of this production process, the flue gas flow rate is about 2 4 meters per second for a long time. The flowmeter in the CEMS system originally used the pitot tube differential pressure meter and the thermal flowmeter, which could not operate normally, which had a certain impact on the production of the enterprise.

After many investigations, in July 2018, the company installed the UF200 ultrasonic velocity meter of Nanjing Juli Automation Technology, the principle of which is the ultrasonic principle of time difference method. Installed on an existing CEMS platform to replace other principle flow rate meters.

After more than half a year of actual operation, the flue gas ultrasonic flow meter is in good running condition, the measurement data is stable and reliable, and the maintenance is small. Due to the special anti-corrosion measures, the end face of the sensor is clean and good, free of pollutants and corrosion, which solves a major problem in the flow rate measurement of the CEMS system.

Ultrasonic flue gas flow monitor generally refers to ultrasonic flue gas flow meter, also called flue gas ultrasonic flow meter.

It is an ultrasonic flowmeter specially used to measure flue gas flow, and the measurement principle is time-difference ultrasonic. The installation method is diagonal and cross-sectional.

The ultrasonic flue gas flow monitor uses ultrasonic technology to measure the flow rate, and the flow rate is measured according to the reflection of sound waves.