Principle and characteristics and advantages of flue gas flow meter

Abstract: The principle, characteristics and advantages of flue gas flow meter are provided by excellent flow meter and flow meter manufacturers. The working conditions of flue gas flow measurement are complex, including muddy water, corrosion, and large pipe diameter. The traditional measurement method is easy to block, and based on the principle of differential pressure, when the pressure is low, there is a measurement blind spot. Flue gas flowmeter, measured by constant power method, is effective. For more flowmeter manufacturers to select models and price quotations, you are welcome to inquire. The following is the details of the principle, characteristics and advantages of the flue gas flowmeter. The working conditions of flue gas flow measurement are complex, including muddy water, corrosion, and large pipe diameter. The traditional measurement method is easy to block, and based on the principle of differential pressure, when the pressure is low, there is a measurement blind spot. The flue gas flowmeter is measured by the constant power method, which effectively solves the key problems of high temperature/high humidity, while the gas mass flowmeter measures large pipe diameter and low flow rate, which are inherent characteristics, and realizes high-precision measurement of large pipes. The special material and anti-corrosion coating can effectively solve the problem of anti-corrosion and ensure long-term high-precision measurement. The sensor has only two smooth probes, so there is no problem of blocking. If the probe is stuck with mud and water, an automatic cleaning device can be added. The WT-98 flue gas flowmeter does not require pressure and temperature correction, and directly measures the mass flow of the gas. Wide turndown ratio. The principle is that the rate at which the fluid absorbs heat is directly related to the mass flow rate. 1. Product introduction of flue gas flowmeter ■ Leader of gas quality measurement ■ Original German imported sensor ■ Constant power method measurement 2. Features of flue gas flow meter:•Platinum RTD sensor, high stability•Achieve high linearity, high stability and high precision•The range ratio is 100:1 (up to 1000:1), which can be expanded according to user requirements•The minimum flow can be measured as low as zero, with a resolution of 0.001m/s•Realize high-precision measurement of large diameter and small flow (pipe size can be up to 15m)•Vibration effects are negligible•Straight pipe section requirements are not high•The pressure loss is small and can be ignored•Independent of medium temperature and pressure, medium temperature self-compensation•Proprietary high temperature software, the medium temperature can reach 500 ℃,•High-humidity software is used to achieve high-precision measurement of high-humidity gas•Enter on-line dynamic correction for flow signal•Liquid crystal display, simultaneous display of instantaneous flow and cumulative flow•Insensitive to small particles such as dust•Online continuous flow maintenance 3. Product principle of flue gas flowmeter: The flue gas flowmeter is a flow meter based on the principle of thermal diffusion. That is, when the fluid flows through the heating object, the heat dissipation of the heating object is proportional to the flow rate of the fluid. That is, the sensor of the flowmeter has two standard-grade RTDs, one is used as a heat source, and the other is used to measure the fluid temperature. When the fluid flows, the temperature difference between the two has a nonlinear relationship with the flow rate. The meter can then convert this relationship into a linear output of the measured flow signal. There are two design methods for flow meters manufactured by the principle of thermal diffusion: one is based on the principle of constant temperature difference; the other is based on the principle of constant power. Based on a common data model: P/△T=A+B(Q)N---1. Here: P---dissipated power, △T---temperature difference between two sensors, A, B are coefficients related to the thermal properties of the gas. The principle of constant temperature difference: △T remains unchanged, and the dissipated power P and the flow rate Q of the fluid increase exponentially. The principle of constant power: the dissipated power remains unchanged, and the temperature difference ΔT and the flow rate Q of the fluid decrease exponentially. Four, flue gas flow meter performance indicators:•Measuring range: 0--120m/s (20℃, 101.33KPa)•Accuracy:±1% of reading±0.5% of full scale•Repeatability:±0.15%FS•Ambient temperature range: -40℃－80℃ Humidity less than 90%RH•Medium temperature range: -40-500℃•Output: Flow: 4-20mADC; Temperature: 4-20mADC•Nonlinear correction•Communication: RS232/RS485•Power supply:; 24VDC220V•Output upper and lower limit relays•Instantaneous flow/cumulative flow display•Clear function•LCD display•Process pressure:<1.6Mpa (expanded upon request)•Protection class: IP65•Explosion-proof grade: ExdⅡCT4 5. Flowmeter product application:•n Factory compressed air measurement•nGas measurement•Gas and air supply air measurement for boilers•n sewage treatment waterfall gas measurement•n flare gas measurement•nLiquid gas and biogas measurement•nHydrogen measurement•n Steel plant gas measurement•n Ammonia measurement in fertilizer plant•n Measurement of coke oven gas in coking plant•Measurement of blast furnace gas in ironworks•n Measurement of primary air and secondary air of blast furnace in power plant•pulverized coal combustion process powder/gas ratio control•n chimney flue exhaust monitoring SO2 and NOX emissions•n Fuel cell factory various gas flow measurement•n Cement industry vertical mill discharge hot air flow control•Control of hydrogen, oxygen, nitrogen and other gases in heat treatment and quenching furnaces•n Measurement and control of heating furnace gas (blast furnace gas, coking gas, natural gas, etc.) in rolling mills The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'The principle and characteristics and advantages of flue gas flow meter'

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