Ammonia storage and ammonia measurement injection system utilizing engine exhaust and cooling water heating

Abstract

The invention discloses an ammonia storage and ammonia measurement injection system utilizing engine exhaust and cooling water heating. The system comprises an engine (1), an ammonia tank (2), a controller (3), a turbocharger (8) and a heat exchanger (4), wherein an ammonia tank heating pipe (9) is arranged inside the ammonia tank (2), an air inlet of the heat exchanger (4) communicates with an exhaust pipe of the engine (1) in front of the turbocharger (8), and an air outlet of the heat exchanger (4) communicates with another exhaust pipe behind the turbocharger (8); and a liquid inlet of theheat exchanger (4) communicates with a cooling water outlet of the engine (1), and a liquid outlet of the heat exchanger (4) communicates with the ammonia tank heating pipe (9). According to the ammonia storage and ammonia measurement injection system, the temperature of cooling water of the engine can be accurately controlled, so that the ammonia generation amount of the ammonia tank (2) is accurately controlled; and meanwhile, the heating temperature is relatively stable, so that a relatively stable amount of ammonia is generated, and stability and metering precision of the system are improved.

Description

technical field [0001] The invention relates to an ammonia storage and ammonia metering injection system, and more specifically relates to an ammonia storage and ammonia metering injection system that utilizes engine exhaust and cooling water to heat the system, and belongs to the technical field of engine tail gas purification. Background technique [0002] At present, existing automobiles usually use engine cooling water or waste heat to heat the ammonia generator to generate ammonia. Chinese patent authorization announcement number: CN202832726U, authorization announcement date: March 27, 2013, and a utility model patent named "A system for storing ammonia and supplying ammonia in a single-stage waste heat mode", which discloses a system that uses engine cooling water to heat The ammonia gas generator produces ammonia gas and the ammonia gas metering injection system; its structure is simple, the cost is low, and it has great practical value. China patent authorization a...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of poor ammonia metering precision existing in existing ammonia gas generators that use engine cooling water or waste heat to heat ammonia gas, or consume more electric energy, or cause larger solid ammonia production in ammonia gas generators Defects such as damage due to stress, provide a system that uses engine exhaust and cooling water to heat ammonia storage and ammonia metering injection system

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