Ultra-low NOx emission submerged combustion type gasification system capable of deeply utilizing waste heat

Abstract

The invention relates to an ultra-low NOx emission submerged combustion type gasification system capable of deeply utilizing waste heat. The ultra-low NOx emission submerged combustion type gasification system capable of deeply utilizing the waste heat is characterized by comprising a main fan, a main combustor, a flue gas distributor, a water tank, a gasification tube bundle and the like, wherein the main fan (1) is connected with the main combustor (2) and an auxiliary combustor (8); the main combustor (2) is connected with the flue gas distributor (3); the main combustor (2), the gasification tube bundle (5) and the auxiliary combustor (8) are arranged in the water tank (4); the flue gas distributor (3) is arranged at the bottom of the water tank (4); a chimney (7) is connected with the top of the water tank (4); outlets of the chimney (7) and the auxiliary combustor (8) are connected with a gas mixer (9); the gas mixer (9), a denitration reactor (10), a heat exchanger (11), an induced draft fan (12) and a scrubber tower (13) are sequentially connected; and a reducing agent system is arranged in front of the gas mixer (9) or the denitration reactor (10). The ultra-low NOx emission submerged combustion type gasification system capable of deeply utilizing the waste heat provided by the invention is low in nitrogen oxide emission, energy-saving and environment-friendly.

Description

technical field [0001] The invention relates to a liquefied natural gas gasification technology, in particular to a gasifier technology, in particular to an ultra-low NOx emission submerged combustion gasification system for deep utilization of waste heat. Background technique [0002] In recent years, as the demand for natural gas energy has increased, the demand for liquefied natural gas (LNG) gasification has also increased. The submerged combustion gasifier is an important form of liquefied natural gas gasifier. It uses high-temperature flue gas generated by gas combustion to heat water, and then uses hot water to gasify LNG in the gasification tube bundle into natural gas (NG). The natural gas is then exported from the gasifier. [0003] Nitrogen oxides (NOx) are one of the main pollutants in the atmosphere, causing serious harm to human health, environmental ecology, and social production activities. The flue gas produced by industrial activities needs to be purified ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to design an ultra-low NOx emission submerged combustion gasification system with deep utilization of waste heat, aiming at the problem that a large amount of nitrogen oxides will be produced in the current liquefied natural gas gasification process and pollute the environment. By setting a flue gas denitrification device and The waste heat recovery device not only solves the problem of denitrification of flue gas, but also deeply utilizes the waste heat of flue gas after denitrification, achieving the purpose of energy saving and environmental protection

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