Guide float valve tray

Abstract

The present invention relates to a guide float valve plate which comprises a guide float valve which is a symmetrical quadrangular guide float valve, its valve cover is a quadrangular from with symmetrical diagonal liens, the included angle of long edges is directed against overflow weir, under the valve cover more than three valve legs are mouthed, front valve leg length is longer than rear valve leg length, so that when the float value is completely opened, between valve cover and valve hole plate an included angle toward overflow weir is opened, said included angle is 2-10 deg, and on the valve cover can be mounted the guide hole and guide plate. Said invention can effectively reduce liquid level gradient on the plate, raise plate flux, raise mass transfer efficiency and reduce resistance of plate.

Description

1. Technical field [0001] The invention relates to a fractionation tower, in particular to a valve tower. 2. Background technology [0002] The valve tray has the advantages of large production capacity, large operating flexibility, and high tray efficiency, and is one of the most widely used plate types. At present, the F1 type float valve is commonly used in industrial float valve trays. One disadvantage of the float valve is that it has no guiding effect on the liquid flow on the tray, resulting in a large gradient of the liquid level on the tray, severe back-mixing of the liquid, and impaired mass transfer efficiency. In addition, due to its structural characteristics, the contact area between the gas phase and the liquid phase rising from the valve plate is relatively small, which also limits its separation efficiency. For this reason, people have made various improvements to it, and have developed guide float valves, trapezoidal float valves, combined float valves, a...

AI Technical Summary

Problems solved by technology

One disadvantage of the float valve is that it has no guiding effect on the liquid flow on the tray, resulting in a large gradient of the liquid level on the tray, serious back-mixing of the liquid, and impaired mass transfer efficiency.

This float valve is one of the best guided float valves at present, but it also has disadvantages, that is, the front end of the valve plate is a plate-shaped valve leg, which is like a baffle, so that the gas cannot flow from the front end of the valve plate to the liquid. The flow is ejected in the same direction, the driving effect of the gas under the valve plate is not fully exerted, and the outlet area through which the gas passes is reduced, resulting in a large pressure drop on the plate

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