11-04-2023 дата публикации
Номер: CN115949488A
Автор:
WANG XINYANG,
YAN YAN,
ZHANG LIAN,
SONG YANHAI,
ZHANG CHENG,
SUN GUANGJIE,
WANG FENGCAI,
LU SHENKE,
ZHANG CHUNLI,
LI SHIMIN,
GUO YU
Принадлежит:
The invention provides a pipeline for prolonging the service life of a passive nitrogen oxide adsorption material and a control method. The pipeline comprises a gas inlet port, a gas outlet port, a left tee joint, a right tee joint, a side pipeline, a main pipeline, a temperature sensor, a PNA packaging box, an SCR catalytic device, a urea pump, a mixer, a flow control valve, a differential pressure sensor and a pressure sensor. According to the control method, the opening and closing scheme of the flow control valve is controlled according to the working state of the PNA packaging box. The working state comprises a PNA adsorption state, a PNA desorption state and a PNA storage state. The control method is combined with pipeline design, so that on the premise of reducing NOx emission under the cold start condition, the service life of the PNA material is greatly prolonged, and the maintenance cost of an after-treatment system is reduced.
Подробнее