A method and device for measuring the dryness of saturated steam by water jet extraction
A technology of measuring device and measuring method, which is applied in the field of saturated steam dryness measurement, can solve the problems of poor measurement accuracy, cleanliness, inability to use negative pressure system, complex system composition, etc., and achieve low cost, simple device composition, and mature technology Effect
Active Publication Date: 2017-01-18
BENGANG STEEL PLATES
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Problems solved by technology
[0003] The technical problem to be solved by the present invention is to provide a method and device for measuring the dryness of saturated steam by water jet pumping, which aims to solve the problem that the measurement accuracy of the dryness of saturated steam in the prior art is affected by the difference of the end difference of the heat exchange surface and the degree of cleanliness. Used in negative pressure systems, the system composition is complicated and the cost is high
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[0034] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0035] A method for measuring the dryness of saturated steam by water jet pumping. In this method, a water outlet pipe is set under the water level in the container, and the water outlet pipe is connected to the inlet of the water jet pump. The water is pressurized by the water jet pump to form a high-speed water flow, which is introduced into the steam outlet installed above the container. Device—water jet extractor, forming a negative pressure in the water jet extractor to draw out the saturated steam to be measured and bring it into the water in the container for mixing and heat exchange. The ste...
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The invention belongs to the field of the measurement of the saturated steam dryness, and in particular relates to a condensed saturated steam dryness measuring method and device capable of introducing to-be-detected saturated steam into a container with a given amount of cooling water from a negative pressure system to exchange heat in a mixing manner. The jetting-water steam extraction device is used for introducing the to-be-detected saturated steam into the container with the given amount of water to exchange the heat in the mixing manner, the steam is condensed into the water in the container so as to release the heat, the water level and temperature in the container are necessarily increased, and the total mass of the to-be-detected saturated steam can be calculated through the increment of the water volume; the heat released by the steam can be calculated by virtue of the variation of the water temperature, the dryness of the saturated steam can be calculated by measuring the pressure, the water level and the water temperature of the saturated steam, and transmitting detected numerical values to a principal computer by utilizing a heat balance equation, and the dryness of the saturated steam can be measured and displayed in real time.
Description
technical field [0001] The invention belongs to the field of dryness measurement of saturated steam, in particular to a condensing saturated steam dryness measurement method and a device thereof capable of introducing saturated steam to be measured from a negative pressure system into a container with a certain amount of cooling water for mixed heat exchange. Background technique [0002] At present, the known methods for measuring the dryness of saturated steam include: (1) The test method determines the dryness of saturated steam by sampling the saturated steam to be tested and testing the salt content in the water. The assay method is a laboratory detection method, which is not suitable for online real-time measurement in engineering. (2) Non-thermodynamic methods include optical detection method, conductivity probe method, capacitance method, hot wire and γ-ray method, etc. At present, the non-thermodynamic method still has great limitations and shortcomings in engineer...
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IPC IPC(8): G01N25/60
Inventor 朱洪波王长友
Owner BENGANG STEEL PLATES