Chemical gas exhaustion collection control detection system in the tank

Abstract

The invention discloses a system for exhausting, collecting, controlling and detecting chemical gases in a tank. A safety valve at the top of the tank is provided with a safety valve opening device. The safety valve opening device is electrically connected with an on-site safety valve opening / closing driving control device via a drive control signal line. The on-site safety valve opening / closing driving control device is connected with an antenna. The gas outlet of the safety valve opening device is connected with an atmosphere and gas storage tank. An overflow pipe is vertically arranged in the tank. The overflow pipe is connected with the gas storage tank. The bottom of the tank is provided with a water drainage port and a water filling port. The valve of each pipe, the sensor of each pipe and the safety valve opening device are connected with a comprehensive control detection device. According to the technical scheme of the invention, liquefied gases and other chemical gases in all tanks on a tank wagon can be fully exhausted, so that the non-artificial automated operation is realized. The occurrence of problems and troubles during the manual detection process of the tank wagon can be avoided. Meanwhile, gases can be stored in the gas storage tank of the system, so that the pollution and the waste of chemical gases are avoided. The working efficiency is improved.

Description

technical field [0001] The invention relates to a gas discharge and recovery system, in particular to a chemical gas discharge collection control detection system used for on-site explosion-proof opening of a tank safety valve. Background technique [0002] Tanks on tank trucks carrying chemical liquids and gases are pressure vessels. According to the "Pressure Vessel Safety Technical Supervision Regulations" issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, the "Liquefied Gas Vehicle Tank Car Safety Supervision Regulations" and GB150 "Steel Pressure Vessels", the special transport vehicles designed and manufactured with lightweight are used for Special vehicles for transporting liquefied gases such as propane, propylene, dimethyl ether, liquid ammonia, methylamine, and acetaldehyde. Tank trucks belong to the special equipment industry. The State Administration of Quality Supervision strictly stipulates...

AI Technical Summary

Problems solved by technology

[0003] At present, the existing detection methods require inspectors to enter the inside of the tank on the tank truck for inspection every time. Since the tank is used to transport various liquefied gases, if the gas is not completely exhausted, it will be harmful to the human body. There is a certain degree of injury or even life-threatening

The general exhaust method is to inject water into the tank, and the gas is discharged from the overflow pipe of the tank, and the overflow pipe of the tank is a U-shaped curved structure at the top of the tank, and the overflow pipe is separated from the tank at the mouth of the tank. The top is larger than 30cm, so the gas cannot be completely exhausted through the overflow pipe. After the exhaust is completed, the inspectors cannot directly enter the inspection, which will cause trouble for the inspection of the tank car. Usually, the method is to vacuumize first, and then use air repeatedly Purge and dilute the chemical gas in the tank to a safe state before personnel can enter the tank

This not only affects the detection progress, but also sweeps the unexhausted chemical gas into the atmosphere, causing pollution and waste

[0004] Therefore, the prior art lacks the automatic equipment that can exhaust the gas in the tank that is about 30 cm from the top of the tank and can collect and preserve this part of the gas.

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