After-treatment control unit for ammonia storage and ammonia supply in the form of exhaust pipe waste heat

Abstract

The invention relates to a post-processing control unit for ammonia storage and ammonia supply by active matter in the exhaust pipe waste heat mode. The sensing end of the pressure tank temperature sensor is inserted into the solid ammonia storage material and connected to the outer wall of the pressure tank. The nozzle end of the reductant conduit is inserted into the intake pipe. The intake pipe temperature sensor, the NOX sensor, and the pressure tank temperature sensor are connected with the electronic The signal input terminal of the control unit and the control terminal of the electronic control unit are connected to the precision proportional valve through the signal line, relying on the control unit and a group of solenoid valves or proportional valves to realize the dose delivery of ammonia and conveniently introduce it into the SCR post-processing system to realize the removal of NOX ; The system is simplified, the reliability is improved, the cost is also greatly reduced, and the obstacles to large-scale industrial promotion and application are eliminated.

Description

technical field [0001] The invention relates to a post-processing control unit for ammonia storage and supply of ammonia by active matter in the form of exhaust pipe waste heat, which is applied to the SCR post-processing industry of automobile exhaust, and is also suitable for FCEV energy storage systems of fuel cells. Background technique [0002] At present, the world is facing comprehensive challenges of energy and environment. In terms of the selection of technical means to meet the emission standards of traditional vehicles, people still face many difficulties, for example, how to choose the technical means of after-treatment and so on. [0003] SCR (SelectiveCatalyticReduction) catalytic conversion reduction technology is a traditional post-treatment technology. The essence of this traditional SCR technology using liquid urea is to use urea to decompose ammonia at high temperature, ammonia as a reducing agent and NOX in engine exhaust react under the combined action ...

AI Technical Summary

Problems solved by technology

[0016] Patent No. CN200680005886.2 for 'High Density Storage of Ammonia' contains solid ammonia storage and delivery materials for ammonia absorbing / desorbing solid materials that have been compacted to a density greater than 50% of the theoretical skeletal density The material provides a solid ammonia storage material. The metal salt solid material described in this patent is also directly molded. It is stated that a binder is used. It only states that a silica fiber binder may be used, and there is no dosage ratio. Without clearly stating the details of other ingredients used, it is almost impossible for skilled personnel in this field to implement

[0017] The search and analysis of the above-mentioned patents show that the use of active ammonia storage compounds to adsorb and decompose ammonia forms an aftertreatment system applied to vehicles, which has not been reported yet.

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