What is the performance of thermal flowmeters in the measurement of coke oven gas?
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Recently, I’ve been facing a challenging task in selecting a metering device for coke oven gas with a large diameter but low flow rate. I was wondering if any of my colleagues have used thermal flow meters to measure coke oven gas and what the results were like. Any help would be greatly appreciated. The pipe diameter is DN1200, the pressure is 8 KPa, and the temperature is at room temperature. The required measurement range is from 3000 Nm3/h to 15000 Nm3/h. Installation must be done online without interrupting production, so only insert-type flow meters are an option; ultimately, a thermal flow meter was chosen. Do any of my colleagues have any better options? What is the effect of using a thermal type?
Thermal mass flow meters can be used in such operating conditions, but it is crucial to ensure that the gas is clean and dry; if it contains moisture, the measurement errors will be significant.
1. For blast furnace gas, the levels of moisture, ash, and tar are inevitably very high; how much effort is required to ensure that the gas is clean and dry? Regardless of costs, it might be possible, haha. 2. Moisture is a non-thermal energy component; determining the level of moisture content cannot be done by a flow meter. Relying on rough temperature and pressure compensation also doesn’t work. 3. When it comes to measuring volumetric flow rate, that method is more accurate and reliable; the value indicated by P has no real meaning. Consider ways to avoid issues caused by tar clogging the probe, and think about what kind of flow meter to choose. 4. Haha
First, you need to control the impurity content in your gas, and also it needs to be installed online? So it means installation during use, right? That seems not to work. If it’s too dirty or if online installation is necessary, then an ultrasonic flow meter could be considered