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A technology of wet steam and measuring instrument, which is applied in the direction of material moisture content, etc., can solve the problems of only offline measurement and can not display the dryness value of wet steam in real time, and achieve the effect of convenient tracking control, simple structure and high measurement accuracy
Active Publication Date: 2013-07-17
NUCLEAR POWER INSTITUTE OF CHINA
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[0004] In order to overcome the technical defect that the existing technology can only measure offline and cannot display the dryness value of wet steam in real time, the present invention provides an online measuring instrument for dryness of wet steam
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[0043] The sampler is connected with the steam pipe 6 and the steam is sampled from the steam pipe, and the sampled steam is input into the heat exchanger 2 .
[0044] The first enthalpy measuring device includes the first temperature measuring device 13 installed at the outlet 44 of the heat exchanger medium, the first pressure measuring device 17 and the second temperature measuring device 14 installed at the second sampling branch 32 .
[0045] The second enthalpy measuring device includes a third temperature measuring device 12 installed at the cooling water inlet 43 of the heat exchanger, a second pressure measuring device 16 and a fourth temperature measuring device 15 installed at the cooling water outlet 41 of the heat exchanger.
[0046] Each temperature measuring device is a platinum resistor arranged upstream, the pressure measuring device is a pressure transmitter, and the first flow measuring device 8 and the second flow measuring device 9 are electromagnetic flowm...
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Abstract
An online wet steam dryness gauge comprises a sampler, a heat exchanger, a water tank, a centrifuge, a cooler, a first sampling branch, a second sampling branch, a first cooling branch, a second cooling branch and a third cooling branch. The sampler, the heat exchanger, the water tank, the centrifuge and the cooler are connected by the first sampling branch, the second sampling branch, the first cooling branch, the second cooling branch and the third cooling branch. The online wet steam dryness gauge further comprises a first enthalpy measuring device, a second enthalpy measuring device, a first flow measuring device, a second flow measuring device and a data processing module, wherein the first enthalpy measuring device is used for measuring enthalpy at a medium outlet of the heat exchanger, the second enthalpy measuring device is used for measuring enthalpy a cooling water inlet and a cooling water outlet, the first flow measuring device is mounted on the second sampling branch, the second flow measuring device is mounted on a second secondary branch, and the data processing module is connected with the first enthalpy measuring device, the second enthalpy measuring device, the first flow measuring device and the second flow measuring device. By the gauge, pressure on a sampling side and a cooling side can be measured and calculated in real time, and real-time wet steam dryness can be provided.
Description
technical field [0001] The invention belongs to the field of thermal measuring instruments, and relates to an online measuring instrument for wet steam dryness. Background technique [0002] Wet steam is a gas-liquid two-phase mixture in which the vapor phase is a continuous phase, the liquid phase is a dispersed phase, and has a stable flow structure. The ratio of the mass of the vapor phase to the total mass of wet steam is defined as the dryness of wet steam. The dryness of wet steam is an important parameter for thermal experimental research and equipment operation; for example, the dryness has a great influence on the operation safety of the heating reactor with low temperature and low dryness natural circulation; It directly affects the blade life of the steam turbine and the efficiency of the steam turbine; in chemical, food processing, pharmaceutical and other industries, the control of steam dryness has an important relationship with the quality of products; The de...
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