Marine gas turbine low-nitrogen combustion system based on low-temperature multi-effect distillation method

Abstract

The invention discloses a marine gas turbine low-nitrogen combustion system based on a low-temperature multi-effect distillation method. The marine gas turbine low-nitrogen combustion system based onthe low-temperature multi-effect distillation method comprises a power output subsystem, a flue gas waste heat recovery subsystem, a sea water desalination subsystem and a steam generation subsystem,wherein the power output subsystem and the flue gas waste heat recovery subsystem are connected through a gas turbine; the flue gas waste heat recovery subsystem and the sea water desalination subsystem are connected through a condensation water evaporator; the sea water desalination subsystem and the steam generation subsystem are connected through a first fresh water pump; and the flue gas wasteheat recovery subsystem and the steam generation subsystem are connected through a steam superheater and a steam generator. According to the marine gas turbine low-nitrogen combustion system based onthe low-temperature multi-effect distillation method provided by the invention, sea water desalination is carried out through the low-temperature multi-effect distillation method so as to prepare fresh water, so that the problem of a fresh water source of gas turbine injected steam is solved, water steam is prepared, the nitrogen oxide emission of the gas turbine is reduced, and the marine gas turbine low-nitrogen combustion system based on the low-temperature multi-effect distillation method has huge economic benefit and ecological benefit.

Description

technical field [0001] The invention relates to a gas turbine low-nitrogen combustion system, in particular to a marine gas turbine low-nitrogen combustion system based on a low-temperature multi-effect distillation method. Background technique [0002] A gas turbine is a rotating impeller heat engine. It uses continuous flowing gas as its working medium and drives the impeller to rotate at high speed. It is an internal combustion power machine that converts the energy of fuel into useful work. When the gas turbine works, the compressor continuously inhales air from the atmosphere and compresses it. The compressed air enters the combustion chamber, mixes with the injected fuel and burns to become high-temperature gas, which then flows into the gas turbine to expand and do work, driving the turbine wheel to rotate. External power output. Compared with conventional power plants such as steam engines and diesel engines, gas turbines have the advantages of high power density an...

AI Technical Summary

Problems solved by technology

[0003] Since the air contains a large amount of nitrogen, the flue gas emitted by the gas turbine contains a large amount of nitrogen oxides. In addition, due to the high combustion temperature of the gas turbine, the flue gas after doing work still has a high temperature. The gas turbine exhaust temperature Usually it can reach above 500°C. If the flue gas is discharged directly without treatment, it will not only pollute the atmosphere but also waste a lot of heat energy.

[0004] The reinjection steam gas turbine cycle can greatly improve the working characteristics of the gas turbine. The application of this technology in industrial power generation gas turbines has been mature, but this technology has not been applied to marine gas turbines, because reinjection steam needs to consume a lot of fresh water. The key The technical bottleneck is that the water source for steam injection has not been properly resolved

Images