A Diesel Engine SCR Atomizer Used in Air-Assisted Mode

Abstract

The utility model relates to an SCR atomizer for a diesel engine in an air-assisted mode, which belongs to the technical field of diesel engine atomization devices. It includes a hollow pipeline, the top of the pipeline is connected with a pipe joint for connecting with an external device, the tail end of the pipeline is connected with a nozzle with a spray hole, and the pipe body of the pipeline is sleeved with a heat insulation shell for heat insulation. The above-mentioned SCR atomizer for diesel engine in the air-assisted mode has a simple structure and a reasonable design. It changes the structure of the electromagnetic nozzle in the atomizer in the prior art, and realizes the efficient atomization of the urea aqueous solution through the combination of a simple mechanical structure. Improve NOx conversion efficiency. Compared with the existing electromagnetic nozzle, the cost of the invention is reduced by more than 50%, the conversion efficiency of NOx is increased by more than 10%, high temperature resistance and high reliability.

Description

technical field [0001] The invention belongs to the technical field of atomization devices for diesel engines, and in particular relates to an SCR atomizer for diesel engines in an air-assisted manner. Background technique [0002] At present, SCR technology has become a heavy-duty diesel engine that meets the National IV emission standards and reduces NO x A mainstream technology for emissions. Diesel engine SCR technology uses urea aqueous solution as a reducing agent to inject into the exhaust of diesel engines. Under the action of exhaust gas temperature and air flow, urea releases ammonia (NH 3 ), and at a certain temperature and under the action of a catalyst, the NO x reduced to nitrogen (N 2 ) and water (H 2 O), in order to reduce NO x purpose of discharge. [0003] In order to inject the urea aqueous solution into the exhaust of the diesel engine, the direct injection method is often used, that is, the urea electromagnetic nozzle is directly installed on the e...

AI Technical Summary

Problems solved by technology

[0003] In order to inject the urea aqueous solution into the exhaust of the diesel engine, the direct injection method is often used, that is, the urea electromagnetic nozzle is directly installed on the exhaust pipe for injection. Since the electromagnetic nozzle is an electronic component, the high exhaust temperature of the engine will cause the urea electromagnetic nozzle to break down. damaged, the urea solenoid nozzle must be cooled

In addition, the current atomization effect of urea aqueous solution using this method is not ideal, which affects the NO x conversion efficiency

Images