Ship tail gas denitrification process and system, desulfurization and denitrification integrated process and system

Abstract

The invention belongs to the field of ship tail gas treatment, energy conservation and environment protection, and particularly relates to a ship tail gas denitration technology and system and a desulfurization and denitration integrated technology and system. When low sulfur oil is used for a ship, the ship tail gas denitration technology and system can achieve high denitration efficiency and reduce energy consumption; when high sulfur content is used for the ship, desulfurization and denitration are combined together, high desulfurization and denitration efficiency is achieved, meanwhile, the cost is greatly saved, and the tail gas exhaust standards are met. The ship tail gas denitration technology comprises the steps of 1, tail gas cooling, 2, NOX adsorption, 3, desorption of NOX adsorbed on an adsorbent, 4, low-temperature plasma decomposition and 5, absorption and reduction. The ship tail desulfurization and denitration integrated technology comprises the steps of 1, tail gas cooling, 2, washing performed through washing water, 3, soda absorption, 4, NOX adsorption, 5, desorption of adsorption water adsorbed on an adsorbent, 6, desorption of NOX adsorbed on an adsorbent, 7, low-temperature plasma decomposition and 8, absorption and reduction.

Description

technical field [0001] The invention belongs to the field of ship tail gas treatment and energy saving and environmental protection, and specifically relates to a ship tail gas denitrification process and system, and a desulfurization and denitrification integrated process and system. Background technique [0002] One of the most serious challenges facing our country in the 21st century is the environmental problem, among which air pollution has been paid more and more attention by people because it seriously damages the health of the earth's ecosystem and threatens the health and safety of human beings. With the rapid development of the global shipping industry, the pollution caused by the tail gas emitted by ships to the atmosphere is becoming more and more serious. Exhaust gases emitted by ships are mainly sulfur oxides (SO x ) and nitrogen oxides (NO x ), they can cause adverse effects such as environmental acidification, destruction of tropospheric ozone, nutrient enr...

AI Technical Summary

Problems solved by technology

The main idea of ​​the existing desulfurization and denitrification integrated technology is to use the above-mentioned separate desulfurization or denitrification technologies in an organic combination. However, whether it is desulfurization first or denitrification first, the desulfurization and denitrification efficiency is not high, the investment and operation costs are high, and the solid matter on board Difficult storage, high energy consumption, difficulty in effectively connecting desulfurization and denitrification technologies, etc.

Due to the limitation of ship exhaust gas treatment technology by ship type, ship space, energy consumption and other factors, the desulfurization and denitrification technology used on land cannot be applied on ships

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