Portable detection device and monitoring method of liquid impurity content in lng tank truck

Abstract

The invention relates to an LNG (liquefied natural gas) tank car liquid state impurity content portable detection device, which comprises an LNG tank, wherein a liquid storage chamber is arranged in the LNG tank. The LNG tank car liquid state impurity content portable detection device is characterized in that a telescopic sampling pipe is arranged in the liquid storage chamber; first pulleys driven to rotate by an explosion-proof motor are arranged at two sides of the telescopic sampling pipe; second pulleys are arranged at the bottom of the LNG tank; one end of a steel wire rope is fixed at connecting holes in the two sides of the telescopic sampling pipe; the other end of the steel wire rope sequentially bypasses the second pulley and the first pulley to be fixed onto the connecting hole again; a control conducting wire is connected between a PLC controller and the motor. The LNG tank car liquid state impurity content portable detection device has the beneficial effects that by extracting liquid nitrogen in transportation, an instrument is used for analysis and detection to obtain data; the recording is well done; the device is portably carried, so that a plurality of LNG tank cars can be detected; the cost is low; the detection device is suitable for being popularized and used.

Description

technical field [0001] The invention relates to a portable detection device for liquid impurity content of an LNG tank truck and a monitoring method thereof, belonging to the technical field of chemical monitoring. Background technique [0002] Liquid Nitrogen: Nitrogen gas in liquid form. It is inert, colorless, odorless, non-corrosive, non-flammable, and has an extremely low temperature. Nitrogen makes up the majority of the atmosphere (78.03% by volume, 75.5% by weight). Nitrogen is inert and does not support combustion. A large number of endothermic contacts during vaporization can cause frostbite. Under normal pressure, the temperature of liquid nitrogen is -196°C; 1 cubic meter of liquid nitrogen can expand to 696 cubic meters of pure gaseous nitrogen at 21°C. Liquid nitrogen is a colorless, odorless, low-temperature liquid and gas under high pressure. [0003] For example, an application number of CN203147811U discloses a flame detection device for a regenerative...

AI Technical Summary

Problems solved by technology

With 1000 tank cars per year, there is no multi-parameter monitoring technology for the liquid impurity content of LNG tank cars, so it is urgent to develop such equipment to meet market demand

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