Wall flow exhaust particle filtering and electricalloy heating post-regeneration treating device for diesel engine

Abstract

The wall flow type exhaust particle filtering and electrically heating post-regeneration treating device for diesel engine includes mainly lower casing, upper casing, wall flow type honeycombed ceramic, metal filament, heating wire, connecting sheet, canal, power source, pressure sensor, electric controller and warning lamp. The wall flow type honeycombed ceramic is installed inside the post-treating unit casing with one metal wire layer in between. The U-shaped heating wire is inserted into the filtering holes along the wall flow type honeycombed ceramic and connected via the connecting sheet to the wall flow type honeycombed ceramic, with the heating wires in different areas are connected parallelly. Pressure sensors are installed on two ends of the lower casing, and when pressure difference reaches some value, the particle is regenerated. The device has high filtering efficiency, complete regeneration, long ceramic life, high reliability and low cost.

Description

technical field [0001] The invention relates to a diesel engine exhaust particle aftertreatment device, in particular to an electrothermal regeneration aftertreatment device for diesel engine exhaust particle wall flow filtration, and belongs to the technical field of diesel engine exhaust purification treatment. Background technique [0002] Diesel engine is a kind of power machinery with wide application, high demand and high thermal efficiency. However, the harmful emission particles it emits are much higher than gasoline engines, especially the particles with a diameter of 0.01-10 microns are carcinogenic. These particles It often floats at the height of people's breathing, and it is easy to be inhaled into the lungs, which greatly threatens human health. In the case that the pre-treatment and internal treatment of the diesel engine have little effect, the post-treatment of diesel exhaust particulates is often an effective and economical method. There are many after-tre...

AI Technical Summary

Problems solved by technology

[0003] Among these devices, electrostatic trapping and cyclone separation are used to trap diesel engine particles, and then through forced regeneration, fuel injection (gas) combustion-supporting regeneration, microwave heating regeneration and reverse jet regeneration, the structure is complex, the work is unreliable, and the cost is high. , it is difficult to promote the use of

The catalyst of the device that continuously regenerates through oxidation catalysis is prone to poisoning, has high requirements on fuel quality, and has a short service life.

In the existing technology, the utility model patent with the patent number ZL00243080.0-diesel engine exhaust particulate filter microwave regeneration device is composed of a filter body, a microwave source, a microwave power supply, a transmission waveguide and a secondary air device that can supply air to the filter body , the microwave source communicates with the filter regeneration cavity through the transmission waveguide. The transmission waveguide is connected with the exhaust pipe of the diesel engine, and the air is drawn from the original air device of the diesel engine to form a secondary air device. It communicates with the filter regeneration cavity. The structure of the device is complex and requires a relatively high cost High microwave and secondary air devices, high cost, difficult to popularize and apply

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