The application of the gas flow detection technology

Abstract: the application of the gas flow detection technology information produced by excellent flow meter, flow meter manufacturer to offer you the quotation. Abstract: start from the status quo of hot blast stove gas pipe flow are analyzed, from the existing problems, the cause of the problem and solving measures three aspects detailed analysis, combined with the actual, through to the stove with the gas pipe flowmeter HuanXing renovation, to improve the gas. More flow meter manufacturers choose model price quote you are welcome to inquire, here is the application of the gas flow detection technology for details. Start from the status quo of hot blast stove gas pipe flow are analyzed, from the existing problems and the cause of the problem and solving measures from three aspects, analyzes in detail, combined with the actual, through to the stove with the gas pipe flowmeter HuanXing renovation, to improve the precision rate of the gas flow measurement test. 1, iron status quo overview shares 5 #, 6 # top combustion hot blast stove system respectively in July 2005 to November H2005 completed and put into operation, the Russian hopper technology design, each have 3 blast furnace. 5 #, 6 # hot blast stove system gas manifold V cone flowmeter, and the power flow meter were used respectively to measure the gas flow rate. Since 2009, as a result of V cone flowmeter, and the power flow meter appear different degree of congestion, the two stove with the gas pipe flow can't accurate detection, the hot blast stove, and blast furnace brought adverse effect on normal production. 2 shares, the existence question and the reason analysis of ironmaking in building 5 #, 6 # blast V cone flowmeter, and the power flow meter were used respectively to measure stove with the gas pipe flow, as shown in figure 1. Two blast furnace put into production for nearly six years, because of the large gas branch pipe gas moisture, impurities, very easy to form a sticky, often appear flowmeter block fault, makes the gas flow measurement is not accurate, hot blast stove post worker can't accurate control of gas and air flow rate, unable to effectively improve the supply air temperature. 5 # blast V cone flowmeter, by upper and lower flange connection on the gas pipes, unable to remove the cleaning; Adopted by the power of 6 # blast flowmeter flowmeter congestion problems, need to clean out from gas pipe flowmeter, the process gas pipe gas leakage is serious, easy to cause the gas poisoning accidents, to maintenance staff has brought the very big security hidden danger. 3, gas flow optimization support technology in view of the above problems existing in the coal gas flow measuring, we carried out reform, use the opportunity of blast furnace repair and overhaul, the two blast furnace hot blast stove system of gas detection HuanXing flowmeter, installation using pitot flowmeter. 1 pitot working principle of the flowmeter. Pitot flowmeter were extracted using pitot principle of fluid velocity ( A static pressure = dynamic pressure) Again and converted to the fluid volume flow to mass flow of differential pressure type flowmeter. Pitot flowmeter will probe is inserted into the pipe, the total pressure hole for fluid to flow direction, the static pressure hole for fluid to flow direction, through high precision transducer made the difference between the total pressure and static pressure that we have to differential pressure, fluid flow is calculated according to differential pressure. Pitot and flow sensor can realize each probe are on high precision standard wind tunnel from Om to 150 m/s/s wind speed calibration, measuring point in the center pipe, and the calibration data obtained through a complex arithmetic probe correction coefficient, the revised so that the center of the probe to extract the velocity and the average of each point in the pipeline flow form corresponding relation. Mean value of each point in the pipeline flow velocity, and the relationship between the probe to extract the center flow is based on decades of blowing data, tsinghua university. 3. 2 pitot flowmeter its unique advantages. Pitot and flow sensor fundamentally solves the problem such as wind speed measuring volatility, creeping, wear-resisting; Through online dredge, hang dirty easily solved the medium flow rate measurement, the measurement accuracy is higher. Such as measuring range: flow, medium resistance to high temperature and high pressure; Energy saving, high accuracy and high reliability; Installation is simple, easy to maintain, and so on. 4, the gas flow metering detection technology retrofit scheme in determining the good use of new type pitot after the flowmeter, we consult factory, installation and debugging of the flowmeter. 1 determine the pitot probe flowmeter's installation position. 3 meters, because v cone flowmeter affect the air flow within a certain distance below, even produce eddy current, so we can not in hot blast stove l4 m platform near the v-shaped cone under the flange installation pitot probe flowmeter. So make sure the hot blast stove of seven meters platform with a straight pipe gas pipe installation, welding and the pitot flowmeter installation platform. And 6 # hot blast stove in before the power meter, because the power of the flowmeter is external vertically inserted into the gas pipe from the pipe, so in the demolition of the power flow meter and close a valve, the 14 m platform gas stove straight pipe are installed at pitot flowmeter. 4. 2 install the pitot probe flowmeter. Prevent type pitot and installation used in vertical pipe runs from the external vertical plug-in installation, installation has a threaded connection and a variety of ways such as flange connection. Mounted with flange connection, only need the measurement line in around 50 ram of drill a hole, then connect flange positioning welding on the pipe, zui, insert the pitot and duct in accordance with the requirements, through the bolt and the flange fastening. Pitot type probes are simple structure, the flowmeter can plug online.

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