Scale contrast velocity-equalizing tube flowmeter and its application in power plant

Abstract: the scale contrast velocity-equalizing tube flowmeter and its application in power plant information produced by excellent flow meter, flow meter manufacturer to offer you the quotation. With the rapid development of power industry, all kinds of efficient new technology, new technology has been put into use. Advanced technology need to match the high precision control and measurement. For boiler and steam turbine of wind, water, smoke, all kinds of medium flow accurately in an all-round way. More flow meter manufacturers choose model price quote you are welcome to inquire, here is a scale contrast velocity-equalizing tube flowmeter and its application in power plant article details. With the rapid development of power industry, all kinds of efficient new technology, new technology has been put into use. Advanced technology need to match the high precision control and measurement. For boiler and steam turbine of wind, water, smoke, all kinds of medium flow comprehensive accurate measurement, is to ensure its safe and economic operation of one of the necessary conditions. A differential pressure type flow measurement orifice plate with uniform velocity tube type of differential pressure type flow measuring devices currently, zui widely used in industrial measurement or differential pressure type flow measurement, differential pressure type of mainstream products for the throttle type ( Orifice plate and venturi tube, etc. ) And the dynamic pressure head type ( Velocity-equalizing tube) 。 Using the principle of differential pressure flow rate measurement is the engineering zui classic reliable flow measurement methods, differential pressure flowmeter is according to the installation in pipe flow test of differential pressure, the fluid known conditions and geometry size of test pieces and pipeline to calculate the flow. By a differential pressure type flowmeter device ( Detection) And the second device ( The differential transformation and flow display instrument) Composition. Usually in the form of test pieces classification of differential pressure flowmeter, such as orifice meter, venturi meter, velocity-equalizing tube flowmeter, etc. The pipe flow test pieces of the differential pressure, the greater the cost for differential pressure transmitter type selection and the more benefits, also good for the accuracy of measurement. But because of the flow measurement device is usually choose according to flow volume shrinkage ratio ( Orifice, nozzle) And therefore improve the pressure loss of the differential pressure at the same time also can produce increases. * in the pipeline pressure loss increase need to increase the pipe, it need high power fan and water pump, such as increased energy consumption, increase the operation cost of the whole system. Differential pressure on behalf of the product for the orifice flowmeter, because its installation, use and maintenance are very familiar with, and the orifice plate is easy to copy, simple, firm, stable and reliable performance, long service life, low price, so for a long time to apply widely. But orifice plate using a long time, precision will fell sharply, the need for periodic inspection and cleaning velocity-equalizing tube flowmeter measurement principle velocity-equalizing tube flowmeter is measured by a replacing orifice diameter on the velocity of cross section of flow velocity, with velocity-equalizing tube section of the continuous development of technology and opening, the measuring precision is improved. Systec - Germany Controls the company and the delta of German famous Erlangen university jointly launched velocity-equalizing tube flowmeter adopted streamlined tube design, traffic detection is by inserting medium pipeline velocity-equalizing tube on the two rows of uneven distribution of selecting pressure hole to detect produced by fluid differential pressure, draw a mean difference of pressure caused by the average flow velocity, and the differential pressure through the interface to the transmitter. Through multiple uneven pressure hole, can truly reflect the average flow velocity in pipe as far as possible. Makes it not only stay in the flow measurement precision, high strength and large span ratio, also greatly reduce the pressure loss of the pipeline. Using plug flow probe compared with using orifice plate, due to the pressure loss of the pipeline is reduced, the economic benefit is very obvious. At the same time characteristic of the probe design can also meet the requirements of small loss of pressure and differential pressure big, easy selection of transmitter. Take the single point of the signal's plug-in flow sensor ( Such as insert turbine, vortex street, electromagnetic, etc. ) Detection of the pipeline flow velocity of one point, and then through the analysis of the velocity profile to experience on the diagram the testing point, deduce the average flow velocity. Pipe, fluid, such as comprehensive situation is complicated, mostly is to finalize the design velocity profile, with a measured value instead of average flow velocity is not accurate, as a direct result of measurement precision is poor, low repeatability. 1. 3 the delta and flow probe advantages ( 1) Can measure a variety of media, the application range is wide, affected by the physical properties and pipeline characteristics of tiny. Diameter can range from 3 mm to 15 m; High temperature and high pressure sensor can work at 650 ℃, 28 mpa steam conditions, such as option 1. 4828年,X15CrNiSi20 - 12 type probe, its working temperature can be as high as 1040 ℃; Also can choose 1. 4539 ( A904 alloy, X1NiCrMoCu25 - 20 - 5) And HC4 type probe, work with SO, SO2 flue gas or acid alkali medium. Delta the flow sensor can be used to: (1) all kinds of gas measurement, including air, wet gas, purification before and after purification, the high temperature flue gas, flue gas, compressed air, primary air and secondary air, etc. ; (2) all kinds of steam measurement, including steam and saturated steam and superheated steam; (3) all kinds of liquid measurement, including water, fuel and benzene class, etc.

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