storage tank vocs safe collection zero discharge device

Abstract

The invention relates to the technical field of atmospheric pressure and low pressure storage tank VOCs collection and emission, in particular to a storage tank VOCs safety collection and zero emission device. The storage tank VOCs safety collection and zero emission device comprises a storage tank group for a plurality of materials, a pressurized oil gas recovery device, a gas extraction device and a nitrogen peak shaving tank, wherein a storage tank pressure monitor and an oil gas branch pipe are correspondingly arranged at the top of each storage tank in the storage tank group, the oil gasbranch pipes at the tops of the plurality of storage tanks for storing the same or similar materials are correspondingly connected with tank group oil gas gathering pipes of the same or similar oil gas, the tank group oil gas gathering pipes of the same or similar oil gas are correspondingly connected to an oil gas main pipe, the oil gas main pipe is sequentially connected with the gas extractiondevice, the pressurized oil gas recovery device and the nitrogen peak shaving tank, wherein each storage tank in the storage tank group is connected with the nitrogen peak shaving tank through a nitrogen sealing valve, and opening and closing of the nitrogen sealing valve are controlled through monitoring signals of the storage tank pressure monitors. According to the storage tank VOCs safety collection zero emission device, the safe collection, zero emission and nitrogen recycling of the VOCs can be realized, so that the increasingly strict environmental protection standards are met.

Description

technical field [0001] The invention relates to the technical field of VOCs collection and discharge in normal pressure and low pressure storage tanks, in particular to a zero discharge device for safe collection of VOCs in storage tanks. Background technique [0002] Odor gas emissions caused by the breathing of storage tanks, the volatilization of residual oil, the shutdown of cleaning lines, and the volatilization of solvents carried in oil have become a major source of air pollution in petroleum, petrochemical, and chemical companies. They are volatile organic compounds (VOCs ) is one of the main sources. As the country pays more and more attention to environmental protection, relevant regulations and standards are becoming increasingly strict. In order to meet the requirements of national laws and regulations, various refining and chemical companies have begun to implement large-scale VOCs collection and treatment projects in oil storage systems. [0003] At present, t...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a zero-emission device for safe collection of VOCs in storage tanks to overcome the problems of difficult discharge standards, high energy consumption, and significant group tank fire risks in the prior art storage tank VOCs treatment

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