Valve for coke tower

Abstract

The invention discloses a valve for a coke tower and belongs to the field of oil refining and chemical engineering devices. The valves are arranged on the top and at the bottom of the coke tower for a delayed coker. The valve comprises a valve body, a rear valve deck, a front valve deck, an upper valve seat, a lower valve seat, a valve plate, a support, a hydraulic oil cylinder, an unloading hydraulic ring and two sets of belleville springs. According to the structure, the valve has the advantages that after the valve is closed, the total seal specific pressure is quite large, and the sealing force can be adjusted, so that the sealing effect is greatly improved, and the steam consumption is low. In the process of action of the valve for the coke tower, the total seal specific pressure is relatively small after unloading, and therefore the abrasion of the valve plate, the upper valve seat and the lower valve seat is reduced. In the process of operation of the valve for the coke tower, steam is fed into the front valve deck and the rear valve deck, the pressure of the steam is 0.1 Mpa higher than the pressure of a medium, and therefore the auxiliary sealing function is achieved. In this way, through the measures, the valve for the coke tower has the advantages of being zero in medium leakage amount, high in sealing performance, and safe and reliable in overall structure.

Description

technical field [0001] The invention relates to the field of oil chemical equipment, in particular to a valve for a coking tower, which is arranged at the bottom and top of the coking tower of a delayed coking device. Background technique [0002] In the modern oil refining industry, the delayed coking unit is one of the important units in the refinery. There are currently more than 40 sets of delayed coking units in the country, and there are more than 20 sets of delayed coking units newly built or under construction in various places. In terms of production scale, there are one furnace and two towers (coke towers) process, two furnaces and four towers process, etc. Among them, the coke tower is the core static equipment in the delayed coking unit. [0003] Usually, the bottom of the coke drum is equipped with a bottom cover machine or blind cover, which is used to discharge chopped petroleum coke; the top of the coke drum is equipped with a top cover machine or blind cov...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the prior art adopts the bolted flange connection structure, it is difficult to disassemble the bolts, not only the labor intensity of the operators is high, a large amount of sealing gaskets are consumed, but also the auxiliary operation time of decoking is long, and the sealing effect of the flange of the tower top cover cannot be guaranteed. , and there are problems such as possible leakage of gas in the coke tower, the embodiment of the present invention provides a valve for coking tower

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