LNG vaporizer with fuel heating function and heating control method thereof

Abstract

The invention discloses an LNG vaporizer with a fuel heating function. The LNG vaporizer comprises n LNG steel bottles (1), an emergency cut-off valve (2), an air-heated vaporizer body (3), a three-way valve (5), a fuel heating device (6) and a pressure regulating system, wherein n is larger than or equal to 1. The pressure regulating system is used for decompressing gasified medium-pressure natural gas to the pressure required by a user and comprises a first-stage pressure regulating device (7), a second-stage pressure regulating device (8), a metering device (9) and an odorizing device (10). The invention further discloses a heating control method of the LNG vaporizer with the fuel heating function. Through the safe, efficient and energy-saving auxiliary heating structure, efficiency is high, the requirement for different gas use loads can be met, the amount of fuel gas for combustion can be adjusted according to the gas use loads, and the requirements for gas use in different regions in different seasons can be met, and the better gasification effect is achieved.

Description

Technical field [0001] The invention relates to a LNG gasification and gas supply device. Specifically, the invention adopts an air-heated gasifier combined with a gasifier that uses gas combustion and heating, and is assembled on a skid with a gas combustion and heating device. Skid-mounted LNG vaporizer and heating control method thereof. Background technique [0002] At present, most of the gasification of LNG uses air-heated vaporizers, but the outlet temperature of the air-heated vaporizers is greatly affected by the ambient temperature. In colder regions in winter, the outlet temperature of the vaporizer is relatively low. Need to use auxiliary heating method to increase temperature. For auxiliary heating, most gasification stations currently use water-bath electric heating methods. Electric heating generally has a small heating load, which cannot meet the needs when the gasification power is large. At the same time, since the electricity cost per unit heat consumption is...

AI Technical Summary

Problems solved by technology

Electric heating generally has a small heating load, which cannot meet the needs of large gasification power. At the same time, because the electricity cost per unit heat consumption is higher than the gas cost, its operating cost is higher than that of gas heating.

Air-temperature vaporizers are mostly used for LNG gasification in small and medium-sized areas. When the ambient temperature is lower than 0°C, the air-temperature vaporizers cannot meet the gas transmission requirements of general pipelines.

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