CN103382126B - Porous ceramic filter core and preparation method thereof - Google Patents

Abstract

The invention provides a porous ceramic filter core and a preparation method thereof. The invention is characterized in that the porous ceramic filter core is prepared from the following raw materials by weight: 22 to 24 parts of quartz powder, 15 to 17 parts of Chinese medical stone flour, 3 to 5 parts of alum powder, 8 to 10 parts of sodium bicarbonate, 4 to 6 parts of mullite powder, 7 to 9 parts of charcoal dust, 10 to 12 parts of polyvinyl alcohol, 2 to 3 parts of propylene glycol, 3 to 4 parts of carboxymethyl cellulose, 25 to 35 parts of modified bentonite and a proper amount of water. The porous ceramic filter core provided by the invention can be used for air filtration of an air-conditioning system, water filtration and inhalation filtration of an automobile filter and is applicable to a variety of places with a severe environment.

Description

A kind of porous ceramic filter element and preparation method thereof

Technical field

The invention belongs to filtering material technical field, specifically a kind of porous ceramic filter element and preparation method thereof.

Background technology

Filtering material purposes is very extensive, is widely used in the industry such as chemical industry, electric power, metallurgy, oil, electronic apparatus, machinery; Modal have air filter for automobile, for filtering the air entering engine, being stopped by the mechanical admixture compositions such as the particle in air, particulate, preventing these compositions from entering in gasoline, diesel oil or machine oil, ensure engine work.A large amount of filtering materials is also had to be used for air handling system, present ambient air pollutes very serious, high risks health, air filting material can by the various deleterious particle thing absorption of air, prevent the life or the working environment that enter people, reduce human lung to the suction of the harmful substances such as particle, improve the quality of life of people, reduce the generation of disease.Some is for water filtration and sewage disposal, for separating of the heavy metal in water or harmful components.Existing filtering material mainly contains ceramic honey comb, filter paper, steel wire etc.Existing honeycomb ceramic filter material feedstock joins function singleness, can not meet the requirement of technology development.

Summary of the invention

The object of this invention is to provide a kind of porous ceramic filter element and preparation method thereof, the present invention has the outstanding advantages such as purification efficiency is high, high temperature resistant, corrosion-resistant, long service life.

The technical solution adopted in the present invention is:

A kind of porous ceramic filter element, is characterized in that being made up of the raw material of following weight portion:

Silica flour 22-24, medical stone powder 15-17, alum powder 3-5, sodium acid carbonate 8-10, mullite powder 4-6, charcoal powder 7-9, polyvinyl alcohol 10-12, propane diols 2-3, carboxymethyl cellulose 3-4, modified alta-mud 25-35, water are appropriate.

Described modified alta-mud is obtained by following methods:

Bentonite is put into 520-540 DEG C of calcining 3-4 hour, take out, cooling, puts into 10-12% hydrochloric acid solution and soaks 2-3 hour, then puts into 10-12% sodium hydroxide solution and soak 1-2 hour, takes out, and cleans with pure water, dries pulverize; Add the aluminium nitride, the Dogbane Leaf of 16-18%, the alum powder of 2-3%, the zeolite powder of 2-3%, the brown powdered sugar of 3-4% that are equivalent to bentonite weight 35-40% again, mix and blend 30-40 minute, and then spray into and be equivalent to bentonite weight 5-7%'s crosslinking agent TAC, under 12000-15000 rev/min, stir 40-50 minute, to obtain final product.

The preparation method of described porous ceramic filter element, is characterized in that comprising the following steps:

Polyvinyl alcohol, propane diols, carboxymethyl cellulose are joined in appropriate hot water and dissolve, then with other mixing of materials, vacuum pugging, be pressed into blank, after oven dry, send in roaster and sinter, first at 210-230 DEG C, sinter 2-3 hour, then, with 6-8 DEG C/min of ramp to 730-760 DEG C, then, with 10-12 DEG C/min of ramp to 1120-1150 DEG C, sintering 3-4 hour, to obtain final product.

Medical stone of the present invention contains the element of a large amount of useful human body, useful to human body, have that purification efficiency is high, high temperature resistant, the pressure loss is little, the outstanding advantages such as corrosion-resistant, long service life, the present invention may be used for air handling system air filtration, also may be used for water filtration, automobile filter inhale filter can also be used for, be applicable to the place of various bad environments.

Detailed description of the invention

A kind of porous ceramic filter element, be made up of the raw material of following weight portion (kilogram):

Silica flour 22, medical stone powder 17, alum powder 3, sodium acid carbonate 10, mullite powder 6, charcoal powder 7, polyvinyl alcohol 12, propane diols 2, carboxymethyl cellulose 4, modified alta-mud 35, water are appropriate.

Described modified alta-mud is obtained by following methods:

Bentonite is put into 520-540 DEG C of calcining 3-4 hour, take out, cooling, puts into 10-12% hydrochloric acid solution and soaks 2-3 hour, then puts into 10-12% sodium hydroxide solution and soak 1-2 hour, takes out, and cleans with pure water, dries pulverize; Add the aluminium nitride, the Dogbane Leaf of 18%, alum powder, the zeolite powder of 3%, the brown powdered sugar of 4% of 3% that are equivalent to bentonite weight 40% again, mix and blend 30-40 minute, and then spray into and be equivalent to bentonite weight 7% crosslinking agent TAC, under 12000-15000 rev/min, stir 40-50 minute, to obtain final product.

The preparation method of porous ceramic filter element, comprises the following steps:

Polyvinyl alcohol, propane diols, carboxymethyl cellulose are joined in appropriate hot water and dissolve, then with other mixing of materials, vacuum pugging, be pressed into blank, after oven dry, send in roaster and sinter, first at 210-230 DEG C, sinter 2-3 hour, then, with 6-8 DEG C/min of ramp to 730-760 DEG C, then, with 10-12 DEG C/min of ramp to 1120-1150 DEG C, sintering 3-4 hour, to obtain final product.

Inventive samples important technological parameters is: heat shock resistance: 950 DEG C-20 DEG C air-cooled does not once split; Maximum operation (service) temperature 1250 DEG C.The technical indicator of exhaust gas purification and treatment device is: process maximum gas temperature 550 DEG C; Trapping micronic dust efficiency >=99%; Outlet drain soot dust granule substrate concentration≤30mg/m3; The dust granules minimum grain size scope 1-10 μm caught.

Claims (1)

1. a porous ceramic filter element, is characterized in that being made up of the raw material of following weight portion:

Silica flour 22-24, medical stone powder 15-17, alum powder 3-5, sodium acid carbonate 8-10, mullite powder 4-6, charcoal powder 7-9, polyvinyl alcohol 10-12, propane diols 2-3, carboxymethyl cellulose 3-4, modified alta-mud 25-35, water are appropriate;

Described modified alta-mud is obtained by following methods:

Bentonite is put into 520-540 DEG C of calcining 3-4 hour, take out, cooling, puts into 10-12% hydrochloric acid solution and soaks 2-3 hour, then puts into 10-12% sodium hydroxide solution and soak 1-2 hour, takes out, and cleans with pure water, dries pulverize; Add the aluminium nitride, the Dogbane Leaf of 16-18%, the alum powder of 2-3%, the zeolite powder of 2-3%, the brown powdered sugar of 3-4% that are equivalent to bentonite weight 35-40% again, mix and blend 30-40 minute, and then spray into and be equivalent to bentonite weight 5-7%'s crosslinking agent TAC, under 12000-15000 rev/min, stir 40-50 minute, to obtain final product;

The preparation method of described porous ceramic filter element, comprises the following steps:

Polyvinyl alcohol, propane diols, carboxymethyl cellulose are joined in appropriate hot water and dissolve, then with other mixing of materials, vacuum pugging, be pressed into blank, after oven dry, send in roaster and sinter, first at 210-230 DEG C, sinter 2-3 hour, then, with 6-8 DEG C/min of ramp to 730-760 DEG C, then, with 10-12 DEG C/min of ramp to 1120-1150 DEG C, sintering 3-4 hour, to obtain final product.