Tight coupling SCR postprocessor

The utility model provides a tight coupling SCR postprocessor. The tight coupling SCR postprocessor is characterized by comprising an air inlet end cover assembly, a mixer assembly, an SCR air outlet assembly and a throttle valve which are sequentially connected in series, the air inlet end cover assembly, the mixer assembly and the SCR air outlet assembly are connected through a V-shaped hoop, and the SCR air outlet assembly is connected with the throttle valve through a bolt; the mixer assembly comprises a mixer barrel, a mixing cavity and a urea nozzle. The postprocessor is compact in structure, exhaust high temperature and turbine turbulent flow gas can be fully utilized, and the problem of low-temperature Nox emission is solved. 本实用新型提供一种紧耦合SCR后处理器，其特征在于：包括依次串联的进气端盖总成、混合器总成、SCR出气总成、节流阀；进气端盖总成、混合器总成、SCR出气总成间通过V型卡箍连接，SCR出气总成与节流阀通过螺栓连接；所述混合器总成包括混合器筒体、混合腔、尿素喷嘴。本实用新型提供结构紧凑、可充分利用排气高温及涡轮扰流气体、解决低温Nox排放问题的后处理器。