Structure and method for self-flushing oil collecting tank

Abstract

The invention discloses a structure and a method for self-flushing an oil collecting tank. The structure and the method are used for flushing the oil collecting tank in a tower device containing a large number of solid particle systems and materials prone to coking under the special conditions of high-temperature operation and the like. An extraction flushing process is added outside the tower, and a special flushing structure is arranged in the tower to realize continuous or intermittent online flushing of a liquid collecting ring, a bottom plate and coking or deposited solids in a liquid collecting channel in a specially designed structure in the oil collecting tank during normal operation, so the coking and depositing phenomena in the oil collecting tank can be eliminated or relieved tothe maximum extent, thereby long-period operation of the device and stable operation of the device are guaranteed. The method makes the actual production of industrial devices of needle coke become possible.

Description

technical field [0001] The invention relates to a tower equipment operation process and internal components in the field of petroleum engineering, in particular to a self-flushing structure of an oil collection tank and a flushing method based on the structure. Background technique [0002] The oil collection tank is an internal component of tower equipment widely used in oil refining, chemical, and coal chemical industrial installations. It is a collection device for liquid materials such as the upper part of the tower that flows to the lower part or feed. The main types of oil collection tanks include disc liquid collectors, grooved plate liquid collectors, finned liquid collectors, etc. Among them, the disc type and grooved plate oil collection tanks are mainly composed of extraction buckets, liquid collection channels, and liquid collection rings. It is composed of a bottom plate, a riser pipe, and a riser cap. Generally, the liquid collection ring around the air riser ...

AI Technical Summary

Problems solved by technology

[0005] For oil collection tanks that generate a large amount of coking or solid deposits during operation, they can only be shut down for removal or replacement in actual operation, which not only causes great economic losses, but also brings huge safety hazards to safe production

[0006] Especially for the production equipment of high-quality needle coke using catalytic oil slurry as raw material, because the catalytic oil slurry contains a large amount of catalyst dust, and has a large specificity, high viscosity, low heat and mass transfer coefficient and easy coalescence and coking at high temperature and other characteristics, which bring great difficulties to the vacuum distillation of extracting needle coke raw materials

If there is no means of online removal of coking and solid particle deposition in the engineering design, the actual operation will continue to cause the fractionation tower and the entire device to be shut down for maintenance, and it is impossible to achieve continuous operation in the true sense. The good economic benefits of the device are also out of the question

Images