Particle filtering device and regenerating method thereof

Abstract

The invention discloses a particle filtering device for a bus and a regenerating method thereof. The particle filtering device has a simple structure, a small size and low manufacturing cost, and is convenient to mount. The device comprises a shell made of a stainless steel material, and a ceramic filter used for filtering particles in tail gas discharged from the bus; the front end of the shell is provided with a gas inlet pipe connected with a gas exhausting port of an engine; the rear end of the shell is provided with a gas exhausting pipe; the shell is provided with a bypass pipe for discharging the particles; and the bypass pipe is provided with a butterfly valve, a pneumatic component, an electromagnetic valve and a controller for controlling the electromagnetic valve. After the bus is stopped at a fixed place, a joint at the end part of the gas exhausting pipe is connected with a compressed air source for regenerating outside the bus; compressed air is spurted, so that the particles fall off from the filter; the particles falling off enter a particle collecting device outside the bus through the bypass pipe; the size of the particle filtering device is equivalent with that of a silencer on the bus; and the remodeling is convenient.

Description

technical field [0001] A particulate filtering device and a regeneration method thereof are used for filtering particulates in diesel engine bus tail gas and regenerating the filtering device. Background technique [0002] "Automotive Environmental Protection Technology" published by Beijing University of Aeronautics and Astronautics Press in February, 2004, a kind of particle filter device with reverse jet purifier is introduced in the page 302-304, and this particle filter device comprises two groups of filter cores, each group The filter elements have a purified exhaust pipe respectively, and a butterfly valve is installed on the pipe, and a compressed air pipeline is installed on the purified exhaust pipeline between the butterfly valve and the filter element. There is an electric heater inside, and its working method is that when filtering, the butterfly valve on the purified exhaust pipe of each filter element is in the open position, and the particles in the exhaust g...

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Problems solved by technology

[0004] Since the particulate filter device with reverse jet purifier is designed considering the factors affecting the engine operation, it will result in large volume, complex structure, high manufacturing cost, and large gas consumption during reverse jet injection, which will cause the pressure drop of the gas storage tank. Inadequacies such as the normal operation of other pneumatic devices on the bus, the above-mentioned literature also mentions that this device can be used in city buses, but there are not many buses using this device in cities in our country, and the above-mentioned inadequacies are also one of the reasons for the impact one

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