LNG air temperature type gasification device and method for generating electricity by using sun wall and temperature difference

Abstract

The invention relates to a LNG air temperature type gasification device and a method for generating electricity by using a sun wall and a temperature difference. A LNG air temperature type gasifier is positioned in the sun wall; air in an environment enters a sun wall cavity consisting of a sun wall inner plate and a sun wall heat collecting plate through small holes on the sun wall heat collecting plate and an air inlet in the bottom; the sun wall heat collecting plate absorbs solar radiation to heat the air; the air is heated to upwards flow, is gathered to an inlet of a fan through an air pipe, and is pressurized by the fan to send to the LNG air temperature type gasifier for gasifying LNG; when no solar radiation exists at night, the air is heated through self heat accumulating function of the sun wall for gasifying the LNG; and electric energy needed by the fan is supplied by a power supply formed by a temperature difference power generation chip. The device is simple in structure, uses a power generation technology of combining the solar radiation with the temperature difference, fully uses solar energy, air energy and LNG cold energy, is free of additional consumption of once energy, is environment-friendly and energy-saved, and is convenient for modularization and commercialization.

Description

technical field [0001] The invention belongs to the technical field of solar energy gasification of LNG, in particular to an LNG air-temperature gasification device and method for generating electricity by utilizing solar walls and temperature differences. Background technique [0002] Liquefied natural gas (LNG) is an important source of city gas in my country, which needs to be gasified from a liquid state to a gaseous state before being supplied to users. Since the temperature of LNG is -162°C, an air-temperature gasifier is often used to gasify LNG. The advantage of the LNG air-temperature gasifier is that it directly absorbs the heat of the air in the atmosphere to gasify LNG, does not consume water and electricity, and has low operating costs, but its gasification capacity (that is, gasification capacity) is greatly affected by the ambient temperature. When the temperature is low, especially in severe cold regions, the gasification capacity may not reach the rated val...

AI Technical Summary

Problems solved by technology

The advantage of the LNG air-temperature gasifier is that it directly absorbs the heat of the air in the atmosphere to gasify LNG, does not consume water and electricity, and has low operating costs, but its gasification capacity (that is, gasification capacity) is greatly affected by the ambient temperature. When the temperature is low, especially in severe cold areas, the gasification capacity may not reach the rated value, and the outer surface of the gasifier is prone to frost and ice

For this reason, the existing technologies mostly use water bath heating, electric heating, or dual-use and one-standby methods to solve the problems of low gasification capacity and easy frosting and freezing of LNG air-temperature vaporizers, but these methods not only consume energy many, and high investment

At the same time, during the gasification process of LNG, a large amount of cold energy stored in itself is not utilized, and is directly wasted to the environment

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