Tail gas desulfurization and denitrification system and tail gas desulfurization and denitrification treatment process

Abstract

The invention discloses a tail gas desulfurization and denitrification system and a tail gas desulfurization and denitrification treatment process. The tail gas desulfurization and denitrification system is used for treating tail gas of a marine diesel engine, and the tail gas desulfurization and denitrification system comprises a supply unit, a reaction liquid circulation unit, a reactor and a control unit. The supply unit is in fluid connection with the reaction liquid circulation unit and is used for providing medicaments for the reaction liquid circulation unit; the reaction liquid circulation unit is in fluid connection with the reactor and is used for accommodating reaction liquid, providing the reaction liquid to the reactor and receiving reaction recovery liquid discharged from the reactor; the reactor is used for enabling the reaction liquid and the tail gas to be in full contact reaction so as to remove NOx and SO2 in the tail gas and discharge gas and reaction recovery liquid; and the control unit is respectively in signal connection with the reactor, the reaction liquid circulation unit and the supply unit so as to control the supply of the medicament according to the detection value of the reaction liquid contained in the reaction liquid circulation unit and the detection value of the discharged gas discharged by the reactor.

Description

technical field [0001] The invention relates to the technical field of tail gas treatment of marine diesel engines, in particular to a tail gas desulfurization and denitrification system and a treatment process for tail gas desulfurization and denitrification. Background technique [0002] When the marine diesel engine is running, it will emit nitrogen oxides and sulfur oxides, which will cause serious pollution to the global environment. The International Maritime Organization and many countries and regions have targeted the NOx of ships X and SO 2 Strict restrictions were imposed. [0003] Currently for marine diesel engine NO X and SO 2 The main way to reduce emissions is to install a selective catalytic reduction system (SCR) and an exhaust gas cleaning system (EGC) respectively behind the exhaust pipe of the diesel engine. When the selective catalytic reduction system is used for denitrification, the SO in the flue gas 2 It is easy to produce sulfate attached to th...

AI Technical Summary

Problems solved by technology

Therefore, the technical route of joint desulfurization and denitrification of marine diesel engines by using a selective catalytic reduction system and an exhaust gas scrubbing system not only has the problems of high technical difficulty and increased investment, but also increases the volume and equipment of the exhaust gas treatment system, resulting in difficulties in ship space layout. , increasing ship operating costs

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