Exhaust gas pretreatment system for diesel engine
A pretreatment and diesel engine technology, which is applied in the direction of charging system, exhaust gas recirculation, mechanical equipment, etc., can solve the problems of increased complexity of the pretreatment system after exhaust gas, unfavorable application and promotion of marine diesel engine products, etc., and achieve the effect of cyclone separation Good, improve the effect of cyclone separation and realize the effect of timely discharge
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[0035] Such as figure 1 As shown, in one embodiment, an exhaust gas pretreatment system for a diesel engine is provided with a humidification device 1, a cyclone separator 2, a Laval nozzle 3, and a diffuser 4 in sequence along the flow direction of the exhaust gas. The cyclone separator 2, the Laval nozzle 3 and the diffuser tube 4 are coaxial; the cyclone separator 2, the Laval nozzle 3 and the diffuser tube 4 are provided with a central body 5 inside. The central body 5 includes a semi-ellipsoid section, a contraction section, a straight section, a first expansion section and a second expansion section in sequence along the flow direction of the exhaust gas.
[0036] Wherein, the arrow direction in the figure indicates the flow direction of exhaust gas in the exhaust gas pretreatment system for diesel engine of this embodiment.
[0037] The humidification device 1 and the cyclone separator 2 are in communication with each other through a pipe 6. The humidification device 1 ado...
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