The thermal gas mass flowmeter is an instrument that measures the flow of fluid using the principle of heat conduction. The instrument uses constant temperature difference method to accurately measure the mass flow of gas. The thermal gas mass flowmeter has the advantages of small volume, high digitization, easy installation and accurate measurement.

1. Technical advantages of thermal gas mass flowmeter products:

1. Unique traffic data model algorithm; Fuzzy theory control temperature and humidity algorithm;

2, high performance intelligent microprocessor and ADC, ADC conversion chip;

3, wide range ratio 1000:1; Large diameter, low flow rate, pressure loss can be ignored;

4, direct measurement of mass flow, without temperature and pressure compensation;

5, low velocity measurement is very sensitive;

6. Convenient design, selection, installation and use;

7, suitable for all kinds of single or mixed gas flow measurement.

Two, hot gas mass flowmeter product features:

1, the use of high stability platinum RTD sensor technology

2, the use of "balanced structure packaging" technology, medium temperature self-compensation

3, unique algorithm, can achieve high linearity, high repeatability, high precision

4, range width 1000:1, can be expanded according to user requirements

5, can achieve large diameter small flow measurement, the minimum flow can be measured as low as zero, resolution 0.001m/s

6, no moving parts, vibration effect can be ignored

7, straight pipe section requirements are not high 1-2D

8, has nothing to do with the temperature and pressure of the medium

9, special high temperature algorithm, medium temperature can reach +400℃,

10. High humidity algorithm is adopted to achieve high precision measurement

11. Type 12-point dynamic correction to the flow signal, with built-in 10-point correction

12. On-line dynamic correction of current/voltage output

13, not sensitive to dust and other small particles

14, online loading and unloading without interruption, easy maintenance

Three, hot gas mass flowmeter application:

1, public works -- electricity, gas, water treatment monitoring

Gas in the pipeline; Universal system; Methane gas; Gas; Natural gas; Liquefied natural gas; Boiler preheating air

2. Oil and Gas industry

Energy exchange; Filling gas recovery; Gas metering; Gas quality analysis; Leakage gas test; Natural gas survey; Monitoring of flare gas

3. Power industry

Gas measurement during gas distribution in a fuel system; Measurement of various gases in boilers and auxiliary systems; Gas measurement in gas furnace; Hydrogen gas measurement; Measurement of primary air and secondary air of blast furnace in power plant

4. Chemical industry

Flue gas circulation monitoring; Gas flow measurement in sampling system; Gas flow measurement of induced draft fan; Ammonia measurement in fertilizer plant; Battery factory all kinds of gas flow measurement

5. Metallurgical industry

Gas filling measurement of steel works; Measurement of blast furnace gas in ironworks; Measurement of coke oven gas in coke plant; Measurement and control of heating furnace gas (blast furnace gas, coking gas, natural gas, etc.) in rolling mill; Control of hydrogen, oxygen, nitrogen and other gases in heat treatment quenching furnaces

6. Pulp and paper industry

Measurement of gases in wastewater treatment systems; Flue flow monitoring; Boiler recovery of secondary/tertiary air; Boiler gas and air supply air measurement

7. Food and pharmaceutical industries

The addition of fresh air during processing operations; Carbon dioxide treatment in breweries; The flow of hot air in the bottle sterilizer; Gas flow measurement in the process of thermal oxidation; Ventilation system; Boiler intake, waste gas, process control

8. Environmental Protection

Gas measurement in biogas utilization process; Chlorine gas measurement in the process of chlorine gas treatment; Gas measurement in aeration tank during sewage treatment; The SO2 and NOX discharge rates are monitored in the chimney flue exhaust

9. Other industries

Factory compressed air measurement; Pulverized coal combustion process powder/gas ratio control fuel; Control of hot gas discharge from vertical mill in cement industry

Four, thermal gas mass flowmeter performance indicators:

1, measurement range: 0.5-100Nm/s (20℃, 101.33KPa)

2, accuracy: ±1.5% reading ±1.5% full scale

3, range ratio: usually 100:1 (depending on the range of calibrated flow)

4, pipe diameter range :15mm ~ 6000mm

5, application range: suitable for all kinds of single or mixed gas. Containing dust, sand, moisture, all kinds of corrosive gases. (except acetylene gas)

6, ambient temperature range: -40℃ ~ +85℃(no display); -30℃ ~ +70℃(display); The humidity is less than 90%RH

7, medium temperature range: -40℃ ~ +100℃; -40℃ ~ +200℃; -40℃ ~ +450℃; -40 ° C to +510 ° C

8, the sensor diameter: Phi 3, Phi 2.5

9, the insertion sensor diameter on the rod: 19 (standard), Phi 16, Phi 12

10, sensor material: 316 stainless steel, Hastelloy, titanium

11. Probe rod material (protective sleeve) : 316 stainless steel (standard), Hastelloy

12, two-way measurement of medium flow

13, analog output: flow: 4-20mADC, temperature: 4-20mADC, maximum load :1000Ω

14. Cumulative pulse output

15. Type in 12 paragraphs of nonlinear correction, and build in 10 paragraphs of nonlinear correction

16, communication: serial port output RS232/RS485

17. Power supply: 24VDC/600mA; 220VAC/2W; 110VAC/3W

18, alarm: 1-2 relay output, 5A/220V, 5A/30VDC, input setting

19, large screen LCD display: seven instantaneous flow, eight cumulative flow

20, process pressure :1.6Mpa (maximum 20MPa)

21, installation process form: insert type (sleeve, sleeve + ball valve, flange connection) is suitable for DN80 or more pipeline installation, pipe type (flange, thread connection) is suitable for DN15 or more pipeline installation.

22, explosion-proof grade: intrinsic safety type (iaⅡCT5), flameproof type (ExdⅡCT4)