Filter core for microparticle capture device, preparation method of filter core and microparticle capture device

Abstract

The invention provides a filter core for a microparticle capture device, a preparation method of the filter core and the microparticle capture device. The filter core is prepared from the following raw material ingredients in parts by weight: 70 to 95 parts of high silica fiber, 5 to 20 parts of silica sol, 0 to 10 parts of organic glue, 0 to 10 parts of zeolite molecular sieves and 0 to 3 parts of coupling agents. The microparticle capture device comprises the filter core. The raw material ingredients of the filter core are reasonably designed; the high silica fiber is used as major ingredients, so that the contact area of the filter core is large; the adsorption load quantity is great; the filtering efficiency is improved; meanwhile, the high-temperature tolerance level of the high silica fiber can reach 1000 DEG C or higher; the requirement on the high temperature during the regeneration can be met; the dispersion performance is good, so that the regeneration is easier. In addition,the high silica fiber does not have the radial and transverse expansion coefficient differences; the heating in the regeneration process is uniform; the filter core cannot be damaged through heat stress; the service life of the filter core is prolonged.

Description

technical field [0001] The invention belongs to the technical field of tail gas treatment, and in particular relates to a filter element used for a particulate trap, a preparation method thereof, and particulate capture. Background technique [0002] At present, controlling the emission of harmful substances from engines is an effective measure to protect the environment. For diesel engines, particulate emissions are one of the two major difficulties in diesel engine control. As environmental protection regulations become increasingly stringent, the particle emission limit value is getting lower and lower. In order to reduce the particle emission of the engine, a particle filter can be used. [0003] A Diesel Particulate Filter (DPF) is a filter installed in the exhaust system of a diesel engine that captures particulate emissions before they enter the atmosphere. The currently used particle traps will block the filter screen with carbon deposits after a period of use and n...

AI Technical Summary

Problems solved by technology

Ceramic material is used as a filter, although it has good high temperature resistance and high mechanical strength, but because of the two times difference in its radial and lateral expansion coefficients, there is uneven heating during the regeneration process, which is prone to thermal stress damage, and the particles are easy to agglomerate. Disadvantages that are conducive to combustion and regeneration

And because of its special pore structure, honeycomb ceramics have high filtration efficiency but high cost

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