LNG gas station cold, heat and electricity triple supply system

Abstract

The invention relates to an LNG gas station cold, heat and electricity triple supply system. The LNG gas station cold, heat and electricity triple supply system comprises an LNG storage tank, an exhaust fan, an LNG-refrigerant heat exchanger, an air temperature type vaporizer, a waste heat heater, a pressure reducing valve, a flow detection device and a generator set, all of which are sequentially connected through a pipeline. The LNG passes through the shell pass of the LNG-refrigerant heat exchanger, a refrigerant circulates in the tube pass of the LNG-refrigerant heat exchanger, and a refrigerant storage tank and a refrigerant-refrigerating agent heat exchanger are sequentially connected between an outlet and an inlet of the tube pass of the LNG-refrigerant heat exchanger through a pipeline. A refrigerating agent circulates in the refrigerant-refrigerating agent heat exchanger. The output end of the LNG storage tank communicates with the input end of the air temperature type vaporizer through a pipeline. An exhaust port of the generator set is connected with a waste heat recycling device through a pipeline, and the output end of the waste heat recycling device is connected with the input end of the waste heat heater through a pipeline. The LNG gas station cold, heat and electricity triple supply system has the beneficial effects that LNG cold energy recycling is achieved, and cold pollution to the environment is avoided; collected heat preheats natural gas at the inlet end of a combustion chamber, the power generating efficiency is improved, and meanwhile LNG is heated and converted into natural gas.

Description

Technical field [0001] The invention relates to a cold, heat and power triple supply system for an LNG gasification station. Background technique [0002] Natural gas, coal and oil are the three major energy sources in the world. Compared with coal and oil, natural gas is not only cleaner, has high calorific value, high economic benefits, and huge reserves. LNG (liquefied natural gas) contains a large amount of high-quality cold energy. LNG is a process of dehydration, desulfurization and purification of gaseous natural gas, and liquefies it into liquid natural gas at -162°C under normal pressure. The volume is about 1 / 600 of the equivalent amount of gaseous natural gas, so it is easy to transport. Not only can it be used as a combustion material for heating energy, but it also carries a lot of cold energy. It takes about 850kWh of power to produce one ton of LNG. The LNG is heated and vaporized to normal temperature before being supplied to users. The process of LNG vaporizati...

AI Technical Summary

Problems solved by technology

These cold energies are not only wasted in vain, but also directly discharged into the surrounding environment will have a certain impact on the surrounding ecology

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