Automatic pipe-cleaning water-cutting oil-returning method and system for multiple storage tanks

Abstract

The invention relates to an automatic pipe-cleaning water-cutting oil-returning method and system for multiple storage tanks, in order to solve the problem of medium residue and carrying in a draining pipeline and a water cutter. Direct discharging type or siphoning type draining pipes of a plurality of storage tanks for storing same media are respectively equipped with manual valves and are respectively connected with the water cutters with medium detectors; the water cutters are connected with water-cutting pipes equipped with water-cutting control valves; the tops of the water cutters are jointly connected with a front return oil converging pipe through front return oil branches equipped with front return oil control valves; the front return oil branches of any two water cutters at the upstream sides of the return oil control valves thereof are respectively connected with rear return oil branches equipped with rear return oil control valves; two rear return oil branches are jointly connected with a rear return oil converging pipe; a return oil pump is connected between the front return oil converging pipe and the rear return oil converging pipe; and the medium detectors, the control valves and the return oil pump are electrically connected with an automatic controller. The invention has the advantages that the oily medium carried by the cut water is eliminated, the environmental pollution is avoided, water can be timely, centrally and efficiently cut, and the smoothness of the water-cutting oil return pipeline is benefited.

Description

technical field [0001] The invention relates to a water cutting method for storage tanks, in particular to an automatic pigging method and system for water cutting and oil return of multi-storage tanks. Background technique [0002] The medium storage tanks in the petrochemical industry are mostly multi-tank integrated configurations due to the need for economies of scale. In order to prevent the oil-water interface from being disturbed during drainage, most of them are equipped with siphon drainage pipelines, that is, the inner ports of the drainage pipelines in the storage tanks face downward. During the water cutting process, the medium entering the siphon drainage pipeline and the water cutter cannot return to the oil by itself through the storage tank drainage pipeline due to the gravity difference of waterlogging; and although some drainage pipelines are straight drainage pipes, due to the viscosity coefficient of the oily medium and the drainage pipeline For reasons s...

AI Technical Summary

Problems solved by technology

[0002] The medium storage tanks in the petrochemical industry are mostly multi-tank integrated configurations due to the need for economies of scale. In order to prevent the oil-water interface from being disturbed during drainage, most of them are equipped with siphon drainage pipelines, that is, the inner ports of the drainage pipelines in the storage tanks face downward. During the water cutting process, the medium entering the siphon drainage pipeline and the water cutter cannot return to the oil by itself through the storage tank drainage pipeline due to the gravity difference of waterlogging; and although some drainage pipelines are straight drainage pipes, due to the viscosity coefficient of the oily medium and the drainage pipeline For reasons such as fineness, it is impossible to return the oil through the drainage pipeline by relying on the gravity difference of oil and water.

Therefore, when the water is cut, the water from the storage tank must pass through the drainage pipeline and the medium in the water cutter. In this way, when the water passes through the drainage pipeline and the medium in the water cutter, the medium must be entrained, resulting in unnecessary medium loss and Environmental pollution after the medium is lost to the water body

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