Abstract: the precession vortex gas meter scale application in the cement industry information produced by excellent
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In chemical, petrochemical, steel, electricity, heating and water treatment industries various flowmeter has been widely applied, is used to measure the flow of various liquid and gas.
As the industry for the requirement of increasing the flow measurement, all kinds of new type flowmeter has been in the market.
More flow meter manufacturers choose model price quote you are welcome to inquire, here is the precession vortex gas meter scale application in the cement industry article details.
In chemical, petrochemical, steel, electricity, heating and water treatment industries various flowmeter has been widely applied, is used to measure the flow of various liquid and gas.
As the industry for the requirement of increasing the flow measurement, all kinds of new flow meter in the market is not very fresh.
Them according to the measuring mechanism under different term, such as the coriolis, ultrasonic, electromagnetic, vortex flowmeter, compared with the traditional volumetric, venturi tube, mechanical orifice plate flowmeter, new type of flowmeter has the characteristics of the novel, in terms of accuracy, reliability, repeatability and maintainability has significant difference compared with the old flowmeter.
In these devices, easy to wear of moving parts with little or no;
Most of the flowmeter are invasive component, with smaller pressure drop and better security;
Many instrument equipped with microprocessor, can perform self-diagnosis and other functions, which can provide users with real-time feedback and historical data collection.
Precession vortex flow gas flowmeter applied in cement industry relative to other industries, all kinds of flowmeter applied in cement industry is less, this is because the production process is the main medium in the process of material flow and air flow, is given priority to with powder and particles in the material flow, material flow in the main process of liquid little, still contain a certain amount of dust and air, and in large pipe through, it brings the flow measurement great difficulty.
Although in some of the process point such as cooling machine room air volume, as a result of measurement is high pressure air flow rate, pipe diameter is not big, generally with the traditional venturi tube, through the differential pressure can be measured, but because of the low measuring accuracy, flow value can only be used as a reference, and use it to adjust the opening of the throttle, the constant air volume is more difficult, at present, some 5000 t/d is not measure the rate of flow of high pressure air, but by measuring the electrical roots blower high voltage output to estimate traffic.
So the flow measurement in the past in the cement industry is almost a blank, automation technology personnel often only, such as temperature, pressure, material level measurement sensors.
As the cement production scale, technological process, constantly updated, the flow measurement and new type flowmeter and application in cement industry, on the performance in the following respects: 1.
Early introduction of some of the large pipe gas flow measurement dry process cement production line, the preheater exit and exhaust gas treatment of foreign companies in the detection of gas flow in pipeline and the corresponding regulating valves, had chosen orifice plate flowmeter, flute velocity-equalizing tube flowmeter, etc. , but the difficulty is too great, in use process due to the flow measurement does not affect the production of cement, after has not been used.
Along with the continuous renewal of cement technology and scale, large vertical mill has been widely used, in the process of vertical mill, import and export volume requirements determine grinding machine and maintain a constant air volume, such as China's exports of Oman 3300 t/d cement production line, adopt the special company of vertical mill, there is this requirement in the measuring point list, 3000 t/d cement production line, the export of raw meal grinding duct diameter is in commonly 800 mm or so.
In flow measurement in the specification, pipe diameter greater than 200 mm is belong to the big flow measurement, such as using traditional orifice plate flowmeter, in operation, as a result of the orifice throttling Kong Rui edge wear, surface contamination, pipe accumulated condensation grey, need to be replaced after wear and tear;
Orifice flowmeter and range than the small, low precision, irreversible loss of pressure big shortcomings, such as;
For large diameter pipeline needs a big flange, its price, installation and maintenance cost is also a concern.
Additional gas flow measurement change by the change of temperature, pressure, gas flow measurement by it will cause serious influence, mainly displays in terms of accuracy and repeatability.
In the cement industry in the process of being tested most of gas containing dust, measuring sensor generally with holes, dust will cause congestion measurement sensor, in cement industry big pipe gas flow measurement is difficult, there are many problems to be solved.
With the emergence of new type differential pressure type velocity-equalizing tube flowmeter, solves the problem of large pipe gas flow measurement, and its range than the big, the characteristics of high precision, small pressure loss of the unrecoverable, also can through various measures to prevent blockage in the gas dust measurement sensors.
This article focuses on the working principle of new type differential pressure type velocity-equalizing tube flowmeter, basic structure, characteristics and application and so on.
2.
Precession vortex flow gas flowmeter measurement process mechanism is used for materials of cement raw materials, intermediate products and end products zui are all solid, and given priority to with granular and powdered materials, the material flow measurement in cement plant is by an electronic belt scale, and all kinds of solid flowmeter is both a process equipment and automation equipment, but do not belong to the flow meter.
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