A storage device for reducing volatilization and odor of mixed aromatics

Abstract

The invention discloses a storage device for reducing volatilization and odor of mixed aromatic hydrocarbons. A detection device is arranged in a storage bin. A storage tank comprises a tank body, a tank opening and a tank lid. A valve is arranged at the lower end of the interior of the tank opening. A groove is formed in the periphery of the tank opening. The tank opening is covered with the tank lid in a screwed mode, and the tank lid stretches into the groove. The storage bin is filled with nitrogen. A nitrogen exhaust pipeline is arranged at the top end of the storage bin. The tail end of the nitrogen exhaust pipeline is connected with a nitrogen back-feed pipeline through a fan, and the nitrogen back-feed pipeline is connected with the bottom of the storage bin. The middle portion of the nitrogen exhaust pipeline is further sleeved with a condensing device. The bottom of the portion, sleeved with the condensing device, of the pipeline is provided with a concave storage area. A feedback pipeline is arranged at the bottom of the storage area. The tail end of the feedback pipeline is fixed to the interior of the storage bin and provided with an electromagnetic valve. The detection device, the condensing device and the electromagnetic valve are all connected with a control panel. The tail end of the feedback pipeline is connected with a hose. The tail end of the hose serves as a connector. A separation blade and a screw cap are arranged on the outer wall of the connector. A sealing pad is arranged at the top end of the interior of the screw cap. By the adoption of the storage device, the volatilized light aromatic hydrocarbons are completely recycled, cyclic utilization of nitrogen is achieved, and zero emission is achieved.

Description

technical field [0001] The invention belongs to the field of chemical storage, in particular to a storage device for reducing volatilization and odor of mixed aromatic hydrocarbons. Background technique [0002] Mixed aromatics is a colorless transparent liquid with a special smell. It is a mixture of aromatics obtained from the extraction of narrow fraction reformed aromatics, which contains benzene, toluene, and xylene. It can be used as raw material for petroleum resin, gasoline and solvent. It can separate benzene, toluene and xylene from it through separation, and it is mainly used in rubber industry, adhesives, shoemaking industry, etc. It is also the main raw material for the production of p-xylene (PX). [0003] Mixed aromatics are extremely volatile during storage and pollute the environment. In addition, aromatics storage tanks are often in an explosive atmosphere. In order to prevent aromatics storage tanks from exploding, the most effective way is to use nitroge...

AI Technical Summary

Problems solved by technology

[0003] Mixed aromatics are extremely volatile during storage and pollute the environment. In addition, aromatics storage tanks are often in an explosive atmosphere. In order to prevent aromatics storage tanks from exploding, the most effective way is to use nitrogen protection. The traditional method is to replenish the air from the breathing valve of the storage tank Nitrogen, which is constantly replenished and exhaled as the tank operates

For the operation of the entire tank farm, this mode of operation requires a huge amount of nitrogen, and the exhaled nitrogen contains saturated organic volatiles, which will cause a lot of waste of nitrogen and increase the operating cost of the enterprise. At the same time, the tail gas containing organic volatiles will pollute surroundings

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