Semi-passing honeycomb ceramic grain filter and preparation method thereof

A particulate filter and honeycomb ceramic technology, applied in the field of material science, can solve the problems such as the semi-pass type honeycomb ceramic particulate filter that has not been reported, and achieve the effect of large removal rate, uniform distribution of micropores, and energy saving.

Inactive Publication Date: 2016-08-10
NANJING KERUI SPECIAL CERAMICS
View PDF5 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the filters related to POC technology are usually in the form of metal mesh, metal f

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Semi-passing honeycomb ceramic grain filter and preparation method thereof
  • Semi-passing honeycomb ceramic grain filter and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0023] Example 1:

[0024] First prepare 27 parts of kaolin with an average particle size of 3 μm (parts by mass, the same below), 39 parts of flaky talc with an average particle size of 13 μm, 16 parts of alumina with an average particle size of 4 μm, and 8 parts of fused silica powder with an average particle size of 8 μm , 12 parts of methyl methacrylate pore-forming agent particles with an average particle size of 35 μm, and 6 parts of hydroxypropyl methylcellulose, 32 parts of water and other raw materials as the water-soluble binder used.

[0025] Then the prepared raw materials are fully mechanically mixed and kneaded to make them uniform, and then degassed and refined for 3 times under the vacuum degree of 95KPa, and aged for 24 hours to obtain plastic mud.

[0026] The plastic mud is made into a cylindrical wet body through a die mechanical extruder. The cross section of the die is circular, the outer diameter is 267mm, and the hole density is 300 holes / square inch; t...

Example Embodiment

[0031] Example 2:

[0032] The addition amount of the pore-forming agent particle methyl methacrylate in Example 1 was reduced from 12 parts to 6 parts, and the addition amount of other raw materials and the preparation process were the same as in Example 1, and the obtained sample detection results were:

[0033] The appearance size, wall thickness, etc. are the same as those of the sample in Example 1, but the porosity is 45%, the average pore diameter of the micropores is 9 μm, the wall thickness is 0.3 mm, the compressive strength is greater than 19 MPa, and the thermal expansion coefficient is 1.0 × 10 -6 / ℃, thermal shock resistance 550℃, removal rate of particulate matter in flue gas is 50%. It shows that reducing the addition amount of methyl methacrylate has a certain decrease in the porosity and average pore diameter of the sample, and also causes a decrease in the particle filtration rate.

Example Embodiment

[0034] Example 3:

[0035] The pore-forming agent in Example 1 is replaced by starch with methyl methacrylate, and its add-on, other raw materials and add-ons, and preparation techniques are the same as in Example 1, and the obtained sample detection results are:

[0036] The appearance size and wall thickness are the same as those of the sample in Example 1, but the porosity is 50%, the average pore diameter of micropores is 11 μm, the wall thickness is 0.3 mm, the compressive strength is 19 MPa, and the thermal expansion coefficient is 1.0×10 -6 / ℃, thermal shock resistance 560℃, removal rate of particulate matter in flue gas 55%. Compared with the measurement results of the sample in Example 1, it is shown that the effect of using starch as a pore-forming agent is not as good as that of methyl methacrylate.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Outer diameteraaaaaaaaaa
Micropore average pore sizeaaaaaaaaaa
Wall thicknessaaaaaaaaaa
Login to view more

Abstract

The invention provides a semi-passing honeycomb ceramic grain filter and a preparation method thereof. A filter is made of honeycomb ceramic with blocking holes alternately crossed at one end and no block hole at the other end. The raw material comprises the following components in parts by weight: 25-30 parts of flake kaolin, 15-20 parts of alumina powder, 37-40 parts of flake talcum, 6-10 parts of fused quartz powder, 8-20 parts of pore forming materials, 3-10 parts of water-solubility binder and a defined amount of water. The preparation method comprises the following steps: mechanically mixing and uniformly kneading the raw materials; performing vacuum processing on the mixture for 2-3 times at the vacuum degree of 90-95KPa and then ageing for 20-40h, thereby acquiring plastic slurry; extruding a honeycomb ceramic wet green body in a certain size through a mold; performing microwave drying for 2h at 8-12Kw, cutting and trimming, thereby acquiring a dry green body; increasing the temperature according to the procedure and sintering into a semi-finished product at high temperature; and mechanically stripping the irregular outer wall of the green body, performing skin-grafting again, performing microwave drying, crossing the blocking holes at single end at intervals and then performing microwave drying, thereby acquiring a finished product.

Description

technical field [0001] The invention relates to a half-through honeycomb ceramic particle filter and a preparation method thereof, belonging to the field of material science. Background technique [0002] The combination of DOC (Diesel Oxidation Catalyst) and DPF (Diesel Particulate Filter) technology is currently the most effective and mature method to remove particulate matter in the exhaust of heavy-duty diesel vehicles. However, due to the easy clogging of DPF and poor passive regeneration, it makes it application is limited. [0003] The POC (Particulate Oxidation Catalyst) developed in recent years is a method that combines DOC technology with a unique filter technology. This type of filter has a lower back pressure than the traditional DPF. Due to the partial filter effect and passive regeneration (on the wall The C particulate matter can pass through the NO in the exhaust gas 2 Oxidized to CO 2 , to regenerate the filter), which can reduce the particulate matter i...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B01D46/24B01D46/00C04B38/00C04B35/16
CPCB01D46/2455C04B38/00C04B2111/00793C04B2111/42B01D46/80C04B35/16
Inventor 孔秋明陈明祥孔德双谷昌军孔亮明孔令仁
Owner NANJING KERUI SPECIAL CERAMICS
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap