A kind of ceramic base effluent filter
Technical field
The present invention relates to water-treatment technology field, more particularly, to a kind of ceramic base effluent filter.
Background technology
Ceramic filter is the filtering material commonly used in water process.General running is:Allow under pressure useless
Water is filtrated to get water purification by filter;After operation a period of time, be by backwash come polishing filter.Backwash is exactly right
Filter applies the pressure in opposite direction come with waste water, allows water purification back through filter, and will build up in the filter is miscellaneous
Matter is rinsed out.
Ceramic filter typically makes loose structure, so can more adsorb the impurity in waste water.But porous knot
The ceramics of structure are easier in adsorbing contaminant, more difficult when backwash is desorbed, and are not only because a large amount of holes and are difficult to entirely
Portion is uniformly subject to buffer brake to impact is desorbed impurity, but also because there is substantial amounts of work the hole inside of porous ceramics in itself
Property surface group, after being combined by hydrogen bond or Van der Waals force with impurity be difficult disengage.Want to disengage hole surface and impurity it
Between adhesion, it is necessary to increase buffer brake, the excessive easily direct internal structure of destruction porous ceramics of pressure makes its cracking collapse
Collapse, it is impossible to be continuing with.
The content of the invention
In view of the above-mentioned problems existing in the prior art, the applicant provides a kind of ceramic base effluent filter.The present invention
The ceramic filter for preparing has double-layer structural, both easily positive to adsorb waste water impurity, also easy backwash desorption, and desorption
Pressure is small, and desorption effect is good, substantially increases the efficiency of filter water.
Technical scheme is as follows:
A kind of ceramic base effluent filter, high temperature sintering is formed after being overlapped by filter layer and de- filtering layer, and the filter layer is
Towards one layer of unfiltered waste water direction, the de- filtering layer is a layer towards filtered water purification direction;
The filter layer is made up of the raw material of following parts by weight:
Activated alumina:30~40 parts;Calcined kaolin:20~30 parts;Anatase titanium dioxide:20~35 parts;Glass
Glass fiber:5~8 parts;Vermiculite:1~3 part;Each raw material average grain diameter of the filter layer is 300~500 microns;
The de- filtering layer is made up of the raw material of following parts by weight:
Common aluminum oxide:40~50 parts;Common kaolin:20~30 parts;Rutile titanium dioxide:10~15 parts;Stone
English:5~10 parts;Pretreated Graphene:3~5 parts;Each raw material average grain diameter of the de- filtering layer is 200~300 microns;
The method of the pretreating graphite alkene is:It is the ethoxy perhydro-s-triazine and graphite of Graphene 3~5% by quality
Alkene adds the acetone soln that concentration is 1~2wt% together, and ultrasonic disperse 40~60 minutes, then dry in the case of stirring
Into powder.
It is first each compressing after the filter layer and the respective raw material of de- filtering layer are well mixed respectively, then it is superimposed on one
Rise by hot binding together;Calcined with reference to after.
The pressure of the hot pressing is 3~5Mpa, and temperature is 120~150 DEG C, and hot pressing time is 3~5 minutes.
When the filter layer and the respective raw material of de- filtering layer mix respectively, surfactant, binding agent, pore creating material are added
And deionized water.
The surfactant is oleic acid, stearic acid, one kind of odium stearate.
The binding agent is methylcellulose or hydroxypropyl methyl cellulose.
The pore creating material is carbon dust, benzoic acid, phenolic resin ball or other conventional pore creating materials, and the particle diameter of the pore creating material is
10~20 microns.
With filter layer and the respective raw material weight of de- filtering layer and be an entirety, the surfactant is respectively the two
The 1~2.5% of total quality, binding agent is respectively the 4~6% of the two total qualities, and pore creating material is respectively the two entirety
The 10~25% of quality;Deionized water is respectively the 30~35% of the two total qualities.
The sintering temperature is 1250~1280 DEG C, and soaking time is 3~5 hours.
The present invention is beneficial to be had technical effect that:
Filter layer of the invention is the porous ceramic structure of conventional easy adsorbing contaminant, and de- filtering layer be then with filtering
Layer is kept on the basis of basically identical chemical composition, has carried out drop activity treatment.First feature of de- filtering layer is micropore chi
It is very little smaller than filter layer, can further prevent smaller size of impurity by filter, improve water purification ability.
Second feature is that activity is low, even if there is impurity to enter the micropore of de- filtering layer, cannot also produce hydrogen bond or model moral
The combination of Hua Li;Pretreated Graphene is particularly with the addition of, its activity, the impurity in backwash process is greatly reduced
Can be desorbed under the effect of small pressure, be backwashed water and be flushed in the micropore of filter layer;Swiftly flowing impurity impact filtration layer
Micropore, serves the effect that physics washes away, and the pressure with backwash water combines, and absorption is acted in mistake equivalent to two parts of strength
Impurity in the micropore of filtering layer, makes them faster, more thoroughly be backwashed away.
3rd feature be it is substantially similar to the crystal structure of filter layer, with the unified with nature of filter layer and it is tight, will not
Because crystal formation suddenly change causes to produce clogging in two-layer junction.
Specific embodiment
With reference to embodiment, the present invention is specifically described.
Embodiment 1
A kind of ceramic base effluent filter, high temperature sintering is formed after being overlapped by filter layer and de- filtering layer, and the filter layer is
Towards one layer of unfiltered waste water direction, the de- filtering layer is a layer towards filtered water purification direction;
The filter layer is made up of the raw material of following parts by weight:Activated alumina:30 parts;Calcined kaolin:20 parts;It is sharp
Titanium ore type titanium dioxide:20 parts;Glass fibre:5 parts;Vermiculite:1 part;Each raw material average grain diameter of the filter layer is 300 micro-
Rice;
The de- filtering layer is made up of the raw material of following parts by weight:Common aluminum oxide:40 parts;Common kaolin:20 parts;Gold
Red stone-type titanium dioxide:10 parts;Quartz:5 parts;Pretreated Graphene:3 parts;Each raw material average grain diameter of the de- filtering layer
It is 200 microns;
The method of the pretreating graphite alkene is:It is the ethoxy perhydro-s-triazine and Graphene of Graphene 3% by quality
It is the acetone soln of 1wt% to add concentration together, and ultrasonic disperse 40 minutes, are then dried to powder in the case of stirring.
Specifically preparation method is:
(1) each raw material of filter layer is mixed, is subsequently adding surfactant, binding agent, pore creating material and deionized water
It is well mixed;The surfactant is oleic acid, and the binding agent is methylcellulose, and the pore creating material is carbon dust, described to make
The particle diameter of hole agent is 10 microns;
With the raw material weight of filter layer and be an entirety, the surfactant is the 1% of this total quality, is bonded
Agent is the 4% of this total quality, and pore creating material is the 10% of this total quality;Deionized water is this total quality
30%.
(2) each raw material of de- filtering layer is mixed, is subsequently adding surfactant, binding agent, pore creating material and deionized water
It is well mixed;The surfactant is oleic acid, and the binding agent is methylcellulose, and the pore creating material is carbon dust, described to make
The particle diameter of hole agent is 10 microns;
To take off the raw material weight of filtering layer and be an entirety, the surfactant is the 1.5% of this total quality, is glued
Knot agent is the 4.3% of this total quality, and pore creating material is the 12% of this total quality;Deionized water is this total quality
31.5%.
(3) it is filter layer and de- filtering layer is each compressing, then be superimposed together by hot binding together;Hot pressing
Pressure is 3Mpa, and temperature is 150 DEG C, and hot pressing time is 5 minutes.Calcined with reference to after.
(4) it is put into calcining furnace through hot binding filter layer together and de- filtering layer and is sintered, sintering temperature is 1250 DEG C,
Soaking time is 5 hours.
Embodiment 2
A kind of ceramic base effluent filter, high temperature sintering is formed after being overlapped by filter layer and de- filtering layer, and the filter layer is
Towards one layer of unfiltered waste water direction, the de- filtering layer is a layer towards filtered water purification direction;
The filter layer is made up of the raw material of following parts by weight:Activated alumina:35 parts;Calcined kaolin:25 parts;It is sharp
Titanium ore type titanium dioxide:30 parts;Glass fibre:6 parts;Vermiculite:2 parts;Each raw material average grain diameter of the filter layer is 400 micro-
Rice;
The de- filtering layer is made up of the raw material of following parts by weight:Common aluminum oxide:45 parts;Common kaolin:25 parts;Gold
Red stone-type titanium dioxide:12 parts;Quartz:8 parts;Pretreated Graphene:4 parts;Each raw material average grain diameter of the de- filtering layer
It is 250 microns;
The method of the pretreating graphite alkene is:It is the ethoxy perhydro-s-triazine and Graphene of Graphene 4% by quality
It is the acetone soln of 1.5wt% to add concentration together, and ultrasonic disperse 50 minutes, are then dried to powder in the case of stirring.
Specifically preparation method is:
(1) each raw material of filter layer is mixed, is subsequently adding surfactant, binding agent, pore creating material and deionized water
It is well mixed;The surfactant is stearic acid, and the binding agent is hydroxypropyl methyl cellulose, and the pore creating material is benzene first
Acid, the particle diameter of the pore creating material is 12 microns;
With the raw material weight of filter layer and be an entirety, the surfactant is the 1.5% of this total quality, is glued
Knot agent is the 5% of this total quality, and pore creating material is the 18% of this total quality;Deionized water is this total quality
33%.
(2) each raw material of de- filtering layer is mixed, is subsequently adding surfactant, binding agent, pore creating material and deionized water
It is well mixed;The surfactant is one kind of odium stearate, and the binding agent is methylcellulose, and the pore creating material is phenol
Urea formaldehyde ball, the particle diameter of the pore creating material is 16 microns;
To take off the raw material weight of filtering layer and be an entirety, the surfactant is the 1.8% of this total quality, is glued
Knot agent is the 5% of this total quality, and pore creating material is the 20% of this total quality;Deionized water is this total quality
32%.
(3) it is filter layer and de- filtering layer is each compressing, then be superimposed together by hot binding together;Hot pressing
Pressure is 4Mpa, and temperature is 130 DEG C, and hot pressing time is 4 minutes.Calcined with reference to after.
(4) it is put into calcining furnace through hot binding filter layer together and de- filtering layer and is sintered, sintering temperature is 1260 DEG C,
Soaking time is 4 hours.
Embodiment 3
A kind of ceramic base effluent filter, high temperature sintering is formed after being overlapped by filter layer and de- filtering layer, and the filter layer is
Towards one layer of unfiltered waste water direction, the de- filtering layer is a layer towards filtered water purification direction;
The filter layer is made up of the raw material of following parts by weight:Activated alumina:40 parts;Calcined kaolin:30 parts;It is sharp
Titanium ore type titanium dioxide:35 parts;Glass fibre:8 parts;Vermiculite:3 parts;Each raw material average grain diameter of the filter layer is 500 micro-
Rice;
The de- filtering layer is made up of the raw material of following parts by weight:Common aluminum oxide:50 parts;Common kaolin:30 parts;Gold
Red stone-type titanium dioxide:5 parts;Quartz:10 parts;Pretreated Graphene:5 parts;Each raw material average grain diameter of the de- filtering layer
It is 300 microns;
The method of the pretreating graphite alkene is:It is the ethoxy perhydro-s-triazine and Graphene of Graphene 5% by quality
It is the acetone soln of 2wt% to add concentration together, and ultrasonic disperse 60 minutes, are then dried to powder in the case of stirring.
Specifically preparation method is:
(1) each raw material of filter layer is mixed, is subsequently adding surfactant, binding agent, pore creating material and deionized water
It is well mixed;The surfactant is odium stearate, and the binding agent is hydroxypropyl methyl cellulose, and the pore creating material is carbon
Powder, the particle diameter of the pore creating material is 20 microns;
With the raw material weight of filter layer and be an entirety, the surfactant is the 2.5% of this total quality, is glued
Knot agent is the 6% of this total quality, and pore creating material is the 25% of this total quality;Deionized water is this total quality
35%.
(2) each raw material of de- filtering layer is mixed, is subsequently adding surfactant, binding agent, pore creating material and deionized water
It is well mixed;The surfactant is odium stearate, and the binding agent is hydroxypropyl methyl cellulose, and the pore creating material is carbon
Powder, the particle diameter of the pore creating material is 20 microns;
To take off the raw material weight of filtering layer and be an entirety, the surfactant is the 2.2% of this total quality, is glued
Knot agent is the 4.7% of this total quality, and pore creating material is the 22% of this total quality;Deionized water is this total quality
35%.
(3) it is filter layer and de- filtering layer is each compressing, then be superimposed together by hot binding together;Hot pressing
Pressure is 5Mpa, and temperature is 120 DEG C, and hot pressing time is 3 minutes.Calcined with reference to after.
(4) it is put into calcining furnace through hot binding filter layer together and de- filtering layer and is sintered, sintering temperature is 1280 DEG C,
Soaking time is 3 hours.
Test case 1:Performance test, the test result such as institute of table 1 are carried out to the ceramic wastewater filter that embodiment 2 is prepared
Show.
Table 1
|
Filter layer |
De- filtering layer |
Porosity (%) |
68 |
75 |
Micro-pore diameter (micron) |
60~90 |
20~40 |
Compression strength (MPa) |
4.52 |
4.69 |
Test case 2:The effluent filter that the present invention is prepared, can as wastewater treatment equipment in intermediate filter ring
Section.Flocculation treatment and coarse filtration first are carried out to waste water, impurity therein is changed into cotton-shaped, and wherein granularity will be more than 100 microns
Contaminant filter fall, be left particle diameter less than 100 microns of impurity, cascade filtration is then carried out using this filter.
The filter prepared using embodiment 2 carries out cascade filtration to coating wastewater and sanitary sewage, before and after filtering
Water index it is as shown in table 2.
Table 2