Cleaning device for carrier in engine exhaust aftertreatment system and control method thereof

Abstract

The invention relates to a cleaning device for a carrier in an engine exhaust gas after-treatment system. The cleaning device comprises a cleaning medium (1), a pressurization pump (2), a heater (3), a temperature sensor (4), a sound wave emitter (5), an after-treatment fixing device (6), a sealing gasket (7), a filter device (10), a reactor (11) and a storage tank (12). The cleaning device is characterized in that the pressurization pump (2), the heater (3), the sound wave emitter (5), the after-treatment device (8), the filter device (10), the cleaning medium (11) and the storage tank (12) are connected through pipelines to form a closed circulating cleaning system; and the device can complete cleaning in two steps, ash removal is conducted firstly, the cleaning medium is then replaced, device parameters are adjusted, the catalyst activity reduction is conducted, and therefore the cleaning device for the engine exhaust gas after-treatment system has the beneficial effect of being wide in application range.

Description

technical field [0001] The invention belongs to the technical field of engine exhaust emission control, and in particular relates to a carrier cleaning device in an engine exhaust aftertreatment system and a control method thereof. Background technique [0002] With the advancement of engine technology and the improvement of the public's environmental protection requirements, my country's engine emission regulations are becoming more and more stringent. With the increasingly stringent engine emission requirements, it is becoming more and more difficult to improve the engine's working process by using in-cylinder purification technology. Engines that can balance power, economy and emission performance will become more and more complex, and their costs will also rise sharply. Therefore, all countries in the world have successively carried out research on engine exhaust after-treatment technology. On the basis of not affecting engine performance, various after-treatment purifica...

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Problems solved by technology

[0008] The purpose of the present invention is to provide a cleaning device for the engine exhaust aftertreatment system, to solve the problems of ash clogging and noble metal catalyst deactivation that often occur during the long-term use of the carrier of the engine aftertreatment system, and to prevent ash clogging The carrier channel of the aftertreatment system will lead to the deterioration of the purification effect of the aftertreatment device and the performance of the engine, and avoid the reduction of the activity of the precious metal catalyst, resulting in the reduction of the purification efficiency of the aftertreatment device

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