Steam isokinetic sampling device

Abstract

The invention provides a steam isokinetic sampling device, characterized by comprising a transition pipe base fixedly connected with the outer wall of a steam pipeline, wherein a sampling device is fixedly connected with the transition pipe base, and the lower end of the sampling device is arranged in the steam pipeline; the upper end of the sampling device is provided with an opening, and the lower end of the sampling device is closed; the side wall of the sampling device positioned in the steam pipeline is provided with a hole facing the flow direction of a working substance, and the hole iscommunicated with the opening in the upper end of the sampling device through a pipeline arranged inside the sampling device. The steam isokinetic sampling device provided by the invention overcomesthe defects of the prior art, and the structure of the sampling device is improved, so that the rigidity of the sampling device is improved, the technical requirements for isokinetic sampling are met,the safety and accuracy of the sampling device during operation are enhanced, the sampling device is convenient to manufacture and assemble, and is widely applied.

Description

technical field [0001] The invention relates to a steam isokinetic sampling device, which is used for strictly supervising and guaranteeing the steam quality. Background technique [0002] During the operation of the boiler, the steam-water medium is polluted and will carry a certain amount of impurities such as salt. When the steam contains excessive impurities, it will precipitate in the boiler and steam turbine, forming deposits such as salt scale. Excessive sediment will increase the resistance of the medium flow, affect the heat transfer efficiency of the boiler, and may cause safety accidents such as tube explosion. Therefore, in the operation of the boiler, the steam quality must be strictly supervised and guaranteed. Using a suitable sampling device, after real-time sampling and analysis, the steam-water medium can be adjusted in time according to the quality of the sample to ensure the normal operation of the boiler and steam turbine. [0003] Such as figure 1 S...

AI Technical Summary

Problems solved by technology

Due to manufacturing and installation errors, the steel plate 8 may deviate from the plane where the elbow is located, thereby increasing the area of ​​steam scouring, which in turn aggravates the risk of elbow fracture; due to the drastic changes in the parameters of the sample in the sampling system, in order to ensure the strength, the sampling bend The pipe 7 and the socket 9 are generally made of austenitic stainless steel or super alloy steel. When welding with the steam pipe 4, the welding of dissimilar steels will affect the welding quality and reduce the welding strength; in addition, in order to ensure the accuracy of sampling, the working medium needs to be When entering the sampling elbow at the same speed, the medium under different parameters will produce holes of different sizes, and it is difficult for the general optional hot-pressed elbow to meet the requirements of different inner diameters.

Therefore, the traditional sampling device structure has certain limitations

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