A closed collection system for the overflow sewage of the torch water-sealed tank

Abstract

The invention relates to a closed sewage collection system for torch water-sealed tank overflow. The U-shaped overflow pipes of the water-sealed tanks of each discharge system are respectively connected to buried sewage tanks, and the vacuum-breaking pipes arranged on the high points of the U-shaped overflow pipes are respectively connected to To the outlet pipe of the respective water seal tank, the gas phase balance pipe of the sewage tank is connected to the outlet pipe of the water seal tank of the designated discharge system or to the water seal tank. When the combustible gas is discharged into the discharge system, the back pressure generated by the gas flow is transmitted to the sewage tank through the gas phase balance pipe, and the sewage in the tank is pressed into the overflow pipe of other water-sealed tanks. Since each water-sealed tank is U-shaped The height difference between the inner surface of the lower part of the pipe at the high point of the overflow pipe and the highest liquid level of the sewage tank is greater than the height of the liquid column corresponding to the back pressure of the discharge system under the design discharge volume, so it does not affect the overflow of the water-sealed tank of other discharge systems. flow. The U-shaped overflow pipe of the present invention has no requirement for the height of the water seal, does not need to be provided with a water seal well, and realizes the closed collection of overflow sewage without adding a VOC treatment device.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and relates to a torch waste liquid collection device, in particular to a closed collection system for the overflow sewage of a torch water-sealing tank. Background technique [0002] The torch system is an important safety and environmental protection facility for petrochemical enterprises. It is used to deal with the flammable gas emitted during the start-up and shutdown of various process devices and auxiliary facilities, and during accidents. It is converted into non-toxic and harmless through timely, safe and reliable venting and combustion. of non-combustible substances, meeting the relevant environmental protection requirements. [0003] The water sealing tank is a liquid (usually water) isolation facility that is used to prevent air infiltration into the combustible gas discharge system to cause explosion, or to divert flow, or to establish back pressure for the discharge...

AI Technical Summary

Problems solved by technology

However, the system still requires the height of the water seal, resulting in the need to set up a water seal well, which increases the project cost and increases the difficulty of operation and maintenance of the water seal pipe

In addition, the system is an open collection system, which does not meet the requirements of the existing environmental protection regulations on VOC fugitive emissions

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