System and method for collecting dirty oil

Abstract

The invention discloses a dirty oil collection system and method. The dirty oil collection system is divided into several collection units, and each collection unit includes a first collection station (8) and a second collection station (9). In a collection unit, the first collection station includes several collection pipes (3) and a steam purge pipe (2), and the outlets of the collection pipes and the steam purge pipe are connected to a secondary collection pipe (5). The second collection station includes several collection pipes and a steam purge pipe, and the outlets of the collection pipes, steam purge pipes and sub-collection pipes are connected to the collection pipe (6). The collection pipe is provided with a collection pipe cut-off valve (4), the steam purge pipe is provided with a steam cut-off valve, the sub-collection pipe is provided with a sub-collection pipe cut-off valve (50), and the collection pipe is provided with a collection pipe section cut-off valve (61) and manifold boundary shut-off valve (62). The invention discloses a method for collecting dirty oil by using the above system. The invention is mainly used for collecting waste oil in petrochemical plants.

Description

technical field [0001] The invention relates to a dirty oil collection system and method in the petrochemical industry. Background technique [0002] In the petrochemical industry, the heavy dirty oil (such as catalytic oil slurry, re-refined oil, residual oil, etc.) discharged from the bottom of some equipment containing heavy oil or the low point of the pipeline needs to be collected and discharged into the dirty oil recovery system. The usual method is to use After the branch pipes collecting dirty oil are collected into the collecting pipe, they are sent out of the device and discharged into the heavy dirty oil recovery system. Since heavy dirty oil is viscous and easy to solidify, and it is easy to freeze and crack pipelines in cold regions, steam (referring to water vapor) heat tracing or electric heat tracing is generally used in engineering design to prevent freezing and condensation. Steam heat tracing or electric heat tracing needs to be carried out continuously f...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a dirty oil collection system and method to solve the problem of large steam consumption or electricity consumption and complicated design and construction of the existing dirty oil collection system and method due to the use of steam or electric heat tracing , The effect of antifreeze and anticondensation is sometimes unsatisfactory, etc.

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