Three direction guided valve tower tray

Abstract

A tower tray with 3-pilot valves features that its float valves or fixed valves are arranged on tower tray in such manner that the central linking line of each valve row is parallel to the inlet dam, the spray direction of the first valve row is parallel to the inlet dam, the spray direction of the second valve row is reverse to that of the first one, the spray direction of the third valve row points to the down-flow tube, and so on. Its advnatages are longer stay time of liquid on tower plate, enhanced mixing and exchange of liquid in vertical direction, and high efficiency and productivity.

Description

technical field [0001] The invention relates to a tray, an important equipment used in distillation and absorption processes in the fields of oil refining, petrochemical, chemical industry, etc., and in particular to a structural design of a tray with three guide valves. Background technique [0002] In oil refining, petrochemical, chemical and other industries, trays are important equipment for separating mixtures, and play an important role in the output, quality, energy consumption, and cost of their products. At present, the most widely used tray technology at home and abroad is the traditional F1 (V1) tray (such as figure 1 shown), but it can no longer meet the current requirements for increasing production, improving quality, and reducing consumption. The problems of this type of tray are as follows: ① When the load is increased, the airflow between the valve holes is sprayed upwards after being hedged, which increases the entrainment of liquid foam , the efficiency d...

AI Technical Summary

Problems solved by technology

At present, the most widely used tray technology at home and abroad is the traditional F1 (V1) tray (such as figure 1 shown), but it can no longer meet the current requirements for increasing production, improving quality, and reducing consumption. The problems of this type of tray are as follows: ① When the load is increased, the airflow between the valve holes is sprayed upwards after being hedged, which increases the entrainment of liquid foam , the efficiency drops; the increase of production capacity is controlled; ②The gas flow radiates around the valve, which increases the back-mixing of the liquid and reduces the efficiency; ③After the liquid flows into the tray from the bow-shaped downcomer, the distribution is very uneven, and the flow velocity in the middle is high. The side arc area forms reflux and stagnation areas, which reduces the efficiency of the tray; ④The liquid inlet area is prone to leakage, and the liquid level on the tray is uneven; ⑤The float valve is easy to rotate and fall off, which seriously affects the operation on the tray

All these will affect the throughput and efficiency of the tray, and have an adverse effect on the separation process

[0003] In recent years, in order to overcome the above shortcomings, the concept of guided float valve has been proposed in China. It uses the kinetic energy of the valve body to eject the air flow to push the liquid to move in the direction of the downcomer, thereby reducing the height of the liquid layer on the tray. Reducing back-mixing improves the performance of the tray to a certain extent, but excessive liquid pushing will cause a negative gradient on the liquid level on the tray, and even throw the liquid into the air at a high gas velocity, reducing the residence time of the liquid on the tray and improving the efficiency. In addition, the uniform liquid pushing effect does not greatly reduce the unevenness of the liquid flow on the tray, so the various guide valves in the prior art do not improve the flux and efficiency of the tray much.

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