Natural gas spherical tank replacement device and replacement method

Abstract

The invention discloses a natural gas spherical tank replacement device and replacement method. The natural gas spherical tank replacement device comprises a natural gas spherical tank, a gas inlet pipe, a gas outlet pipe and a diffusion pipe. Each of the gas inlet pipe, the gas outlet pipe and the diffusion pipe is connected with the natural gas spherical tank, and is provided with an on-off control valve, and a blow-down valve, a bottom inlet and a bottom sealing cover plate for opening or closing the bottom inlet are arranged at the bottom of the natural gas spherical tank. A top inlet and a top sealing cover plate for opening or closing the top inlet are arranged on the top of the natural gas spherical tank. The natural gas spherical tank replacement device further comprises a water mist spraying component which can stretch into the natural gas spherical tank from the top opening and spray water mist to the interior of the natural gas spherical tank. The replacement method comprises the steps that the pressure in the natural gas spherical tank is reduced to ambient pressure, the natural gas spherical tank is opened, the water mist is sprayed to the interior of the natural gas spherical tank so as to wash the natural gas spherical tank, air convection is formed, and replacement is completed. The replacement device and replacement method have the advantages of being safe and reliable in replacement, easy to operate, easy to control, economical, practical, high in efficiency and the like.

Description

technical field [0001] The invention relates to the technical field of natural gas supply, in particular to a natural gas spherical tank replacement device and a replacement method thereof. Background technique [0002] Enterprises in the gas industry generally need to build several or even a dozen gas storage balloon tanks for peak shaving or short-term gas storage during peak gas consumption. The sub-high pressure natural gas storage balloon tanks used for gas storage and peak shaving are pressure vessels. , according to the "Pressure Vessel Safety Technology Supervision Regulations" and "Pressure Vessel Periodic Inspection Rules", it is necessary to conduct regular tank inspections, and the stopped spherical tank is filled with natural gas. Natural gas is a flammable and explosive gas. Filled with natural gas The spherical tank is also in a flammable and explosive state. [0003] Before the inspection of the spherical tank, the spherical tank needs to be replaced to ens...

AI Technical Summary

Problems solved by technology

This method has the following disadvantages: 1. The replacement cost is high, and it is necessary to purchase liquid nitrogen, purchase (or rent) a vaporizer, and metal hoses for filling, etc.; 2. The operation is more complicated; 3. It takes a long time (about 5-6 Hour)

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