Low-carbon low-nitrogen emission power device and exhaust method

Abstract

The invention discloses a low-carbon and low-nitrogen emission power device and an exhaust method. The low-carbon and low-nitrogen emission power device comprises an LNG liquid storage tank, an evaporator, an engine and an NH3 liquid storage tank, wherein the LNG liquid storage tank, the evaporator and the engine are sequentially connected and communicated; and the NH3 liquid storage tank is communicated with the engine. According to the device and the method, NH3, as a carbon-free fuel, does not bring in new carbon elements after being mixed with LNG, does not increase carbon emission while generating combustion heat, and is reliable in emission; and in addition, the mode that liquid NH3 is directly input into the engine instead of being gasified and then combusted is adopted, so that at least one set of gasified gas and a control system thereof can be saved, the system structure is simpler, meanwhile, the liquid NH3 is directly gasified in the engine and then combusted, gasification before combustion can absorb a large amount of heat, the combustion temperature of a combustion chamber of the engine is reduced, generation of NOx is reduced, and double effects are achieved.

Description

technical field [0001] The invention relates to the technical field of power devices, in particular to a low-carbon and low-nitrogen emission power device and an exhaust method. Background technique [0002] With the rapid development of the national economy, the energy field is facing new challenges. The goal of carbon peaking and carbon neutrality is a specific and important challenge in my country's energy field. Clean fuels such as LNG have been widely used in power systems, which have the advantages of low emissions in universities. At the same time, some researchers have added ammonia to LNG and other fuels to achieve further emission reduction, mainly because ammonia fuel has the following advantages: (1 ) carbon-free, colorless gas / liquid, with pungent odor, relative density of 0.82, boiling point of -33.5°C, high octane number, suitable for use as fuel; (2) Compared with LNG, it has a pressure of 8 atmospheres at room temperature It can be liquefied without BOG rec...

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Problems solved by technology

[0003] However, in the existing ammonia-doped combustion power plant, the liquid ammonia and LNG (or liquid hydrogen, liquid synthesis gas and other liquid gases) transported from a long distance are often vaporized separately and then premixed according to a certain ratio. , and then burn, which will make the system must arrange an evaporator and its corresponding control system, making the system and its control system more complicated; at the same time, after the mixed fuel is burned in the engine, it will be directly discharged , which will cause the flue gas to be released with a large amount of heat, resulting in a waste of energy, and at the same time, the higher flue gas discharge temperature will also increase the risk of NOx formation

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