Photoelectric detection method for remaining ammonia amount of solid ammonia storage system

Abstract

The invention relates to a photoelectric detection method for remaining ammonia amount of a solid ammonia storage system. A system used in the photoelectric detection method is composed of a pressure sensor, a temperature sensor, a solid ammonia storage material, an anti-freezing solution guide pipe, an ammonia fullness sensor, an ammonia amount warning sensor, a zero ammonia amount sensor, an ammonia delivery pipe, an ammonia storage tank and a display controller. The anti-freezing solution guide pipe is arranged in the solid ammonia storage material at the bottom of the ammonia storage tank, the pressure sensor and the ammonia delivery pipe are arranged at the top of the ammonia storage tank, and the temperature sensor is arranged on a tank body of the ammonia storage tank. One photoelectric sensor system is disposed in the system in advance, when the system has sufficient ammonia, the photoelectric system is not switched on by dependence of resistance of active materials, when the ammonia amount of the system is smaller than a certain number, the active materials are reduced in volume, and the photoelectric system is switched on to indicate that the ammonia stock is close to limit and notice that ammonia filling is needed. The method has the advantages of ingenious concept, simple technology, easiness in control and maintenance, low cost, safety, reliability and the like.

Description

technical field [0001] The invention relates to a photoelectric detection method for residual ammonia gas in a solid ammonia storage system, which is applied to an SCR post-treatment system of automobile exhaust and an FCEV fuel cell system. Background technique [0002] At present, the world is facing comprehensive challenges of energy and environment. People are still facing many problems in the selection of technical means to meet the emission standards of traditional vehicles, and in the fuel supply technology of new energy vehicles. [0003] The SCR post-treatment system relies on the accurate supply of urea reducing agent and decomposes it into ammonia gas at the front end of the catalyst to remove NOX hazards, so as to purify the exhaust gas and achieve the vehicle's National 4 or above standards. However, in actual use Among them, there are many deficiencies and difficulties in the metered injection of liquid urea that relies on urea decomposed into ammonia gas. For...

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Problems solved by technology

[0011] After CaCl2 adsorbs NH3, it is closely connected with the surrounding particles, forming an agglomeration with almost no pores, and it is difficult for the rest of NH3 to enter this area, resulting in a greatly reduced NH3 adsorption and hindering the formation of ammoniacal calcium chloride complexes; phase Compared with the loose adsorbent powder, the adsorbent solid block formed by direct mechanical pressing has fewer ammonia gas transmission channels, and the adsorption and desorption efficiency is low; in addition, the volume of CaCl2 adsorbs NH3 expands, and the solid block is easy to powder. Fragmentation, affect the use effect

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