CN104998466B - A kind of water process lightweight filter medium and its preparation method and application - Google Patents
A kind of water process lightweight filter medium and its preparation method and application Download PDFInfo
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- CN104998466B CN104998466B CN201510514379.2A CN201510514379A CN104998466B CN 104998466 B CN104998466 B CN 104998466B CN 201510514379 A CN201510514379 A CN 201510514379A CN 104998466 B CN104998466 B CN 104998466B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 69
- 238000000034 method Methods 0.000 title claims abstract description 53
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- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 239000011494 foam glass Substances 0.000 claims abstract description 67
- 239000011521 glass Substances 0.000 claims abstract description 51
- 238000001914 filtration Methods 0.000 claims abstract description 50
- 239000000463 material Substances 0.000 claims abstract description 44
- 238000005187 foaming Methods 0.000 claims abstract description 33
- 239000000843 powder Substances 0.000 claims abstract description 22
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 18
- 239000004088 foaming agent Substances 0.000 claims abstract description 17
- 238000001816 cooling Methods 0.000 claims abstract description 15
- 239000004604 Blowing Agent Substances 0.000 claims abstract description 14
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- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 8
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 8
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 claims description 6
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 claims description 6
- MPPQGYCZBNURDG-UHFFFAOYSA-N 2-propionyl-6-dimethylaminonaphthalene Chemical compound C1=C(N(C)C)C=CC2=CC(C(=O)CC)=CC=C21 MPPQGYCZBNURDG-UHFFFAOYSA-N 0.000 claims description 4
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 4
- 229910000410 antimony oxide Inorganic materials 0.000 claims description 4
- 229910021538 borax Inorganic materials 0.000 claims description 4
- VTRUBDSFZJNXHI-UHFFFAOYSA-N oxoantimony Chemical group [Sb]=O VTRUBDSFZJNXHI-UHFFFAOYSA-N 0.000 claims description 4
- 238000012856 packing Methods 0.000 claims description 4
- FQENQNTWSFEDLI-UHFFFAOYSA-J sodium diphosphate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-]P([O-])(=O)OP([O-])([O-])=O FQENQNTWSFEDLI-UHFFFAOYSA-J 0.000 claims description 4
- 229940048086 sodium pyrophosphate Drugs 0.000 claims description 4
- 239000004328 sodium tetraborate Substances 0.000 claims description 4
- 235000010339 sodium tetraborate Nutrition 0.000 claims description 4
- 235000019818 tetrasodium diphosphate Nutrition 0.000 claims description 4
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 claims description 4
- 239000006229 carbon black Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 229910052628 phlogopite Inorganic materials 0.000 claims description 3
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 3
- 239000004317 sodium nitrate Substances 0.000 claims description 3
- 235000010344 sodium nitrate Nutrition 0.000 claims description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical class N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 2
- 239000010459 dolomite Substances 0.000 claims description 2
- 229910000514 dolomite Inorganic materials 0.000 claims description 2
- 239000010439 graphite Substances 0.000 claims description 2
- 229910002804 graphite Inorganic materials 0.000 claims description 2
- 239000000155 melt Substances 0.000 claims description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 2
- 238000005189 flocculation Methods 0.000 abstract description 5
- 230000016615 flocculation Effects 0.000 abstract description 5
- 239000000706 filtrate Substances 0.000 description 47
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 19
- 239000006004 Quartz sand Substances 0.000 description 13
- 238000005516 engineering process Methods 0.000 description 8
- 230000003311 flocculating effect Effects 0.000 description 6
- 239000004576 sand Substances 0.000 description 6
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- 238000011001 backwashing Methods 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 4
- 239000003344 environmental pollutant Substances 0.000 description 4
- 239000008187 granular material Substances 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 231100000719 pollutant Toxicity 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 239000007859 condensation product Substances 0.000 description 3
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- 239000000047 product Substances 0.000 description 3
- 238000010008 shearing Methods 0.000 description 3
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- 238000005411 Van der Waals force Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
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- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
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- 239000012752 auxiliary agent Substances 0.000 description 1
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- -1 influent quality Substances 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
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- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Landscapes
- Filtering Materials (AREA)
Abstract
The invention provides a kind of water process lightweight filter medium and its preparation method and application, belongs to water treatment field.The water process lightweight filter medium is granular foam glass, and its preparation method includes：Mixed after foaming agent, blowing agent promotor and modifying agent are added in fine glass powder, obtained mixed material；Cooling will be carried out after mixed material melt foaming successively and crushed again, obtaining can be used as the foam glass of water process lightweight filter medium.The foam glass has the properties such as high-voidage, bigger serface, porous, lightweight, during use, not only the rate of filtration is fast, effluent quality is excellent, and filter material layer during backwash easily expands (highest expansion rate 200%), being especially advantageous for backwash is quickly effectively carried out, and provides guarantee directly to carry out tiny flocculation fast filtering；And the foam glass filter media surface is rough and uneven in surface, multi-angular, high voidage, high-specific surface area, with very outstanding float cutoff performance.
Description
Technical field
The present invention relates to water treatment field, in particular to a kind of water process lightweight filter medium and its preparation side
Method and application.
Background technology
Filtration is a kind of Technology being most widely used in water treatment field, at present, almost all of water purification work
Industry must all adopt filtering technique.And, with the increasingly reinforcing of environmental law, most of municipal sewage plant will reach
《Urban wastewater treatment firm pollutant emission standard GB18918-2002》In one-level A standard.Therefore, filtering technique also becomes city
Sewage treatment plant of city reaches one of requisite processing means of one-level A standard.
In correlation technique, it is contemplated that the factor such as the economy of process, maturity and practicality, in existing filtering technique
In, still with traditional sand filtration technology with normal sands, sea sand and quartz sand etc. as filtrate as main flow.
However, in existing sand filtration technology, as sand filtrate is than great (more than 2.60), accordingly, it is difficult to realize more
Sufficiently backwash, and the water yield of backwash is big；Secondly, because quartz sand filter media voidage low (less than 50%), surface area are little
(0.04m2/ g), therefore its retaining power is poor, also there is filtrate easily hardened (dead band), backwash and frequently (is filled due to relatively difficult to achieve
Point backwash, therefore often increase the number of times of backwash) etc. present situation, drastically influence the water quality and production efficiency of water factory's water outlet.
So, existing sand filtration technology selects improper due to filter medium, thus exists that high energy consumption, filter cycle be short, efficiency is low
Problems.
Additionally, existing sewage treatment plant is to reach the purpose for removing TP (total phosphorus) in bio-chemical effluent, it is necessary to set up flocculation work
Skill.However, when carrying out direct micro flocculating filter after flocculation, increasing due to filtering suspension content in water body, it is easier to cause filter
Layer blocking and hardened (dead band), so as to cause the hardened problem of filtrate more to project.So, can only be using " flocculation-sedimentation-filter "
Technique, so as to adds additional the process of a sedimentation, consequently, it is possible to not only considerably increase construction fund, finally makes sewage
Handling process is long, facility floor space is big, production management's difficulty and operating cost increase etc..
In view of this, it is special to propose the present invention.
The content of the invention
The first object of the present invention is to provide a kind of water process lightweight filter medium, and described filter medium is granule
The foam glass of shape, which has the property of lightweight, and in backwash process, which is easily achieved filter material layer expansion (highest expansion rate
200%), being especially advantageous for backwash is quickly effectively carried out, and provides guarantee directly to carry out micro flocculating filter；And the foam glass
Its surface relief of glass filter medium is uneven, and has multi-angular, high-voidage and porous and bigger serface, with very high
Filtration retention float performance.
The second object of the present invention is to provide a kind of preparation method of described water process lightweight filter medium, the party
Method is simple to operate, and condition is easily controllable, is highly convenient for the preparation of foam glass powder.
The third object of the present invention is to steep made by the preparation method for providing described water process lightweight filter medium
The purposes of foam glass, to realize its using value in water treatment field.
In order to realize the above-mentioned purpose of the present invention, spy employs the following technical solutions：
The invention provides a kind of water process lightweight filter medium, the water process lightweight filter medium is graininess
Foam glass.
This water process lightweight filter medium that the present invention is provided is foam glass, when foam glass is as filtrate, its
Light specific gravity, during backwash, it is easy to make filter material layer expand (highest expansion rate 200%), in the presence of water body turbulent flow and shearing force,
Easily peel away the condensation product being attached on filter material surface, therefore, quick backwash is not only realized, and greatly reduces recoil
Scouring water amount, provides guarantee to carry out direct micro flocculating filter, heavy in conventional " flocculation-sedimentation-filter " so as to simplify
Drop technique.
Further, since foam glass filter material surface is rough and uneven in surface, and there is irregular, multi-angular, high voidage, Gao Bibiao
Area and porous, greatly enhance the ability of foam glass media filtration retention float, under equal conditions, using foam
During glass filtrate, stronger than adopting retaining power during common sand filtering material (surface smooth, non-porous), effective guarantee effluent quality is needed
Ask.
Furthermore, due to the voidage height of foam glass filtrate, so that filtering layer can accommodate the ability of suspension pollutant
Also greatly improve.Therefore, it is greatly improved the rate of filtration and efficiency, and then the volume of filtration facility can be substantially reduced, so as to can
Reduce the floor space for the treatment of facility.Further, due to foam glass as filtering layer when, due to light specific gravity, with less dynamic
Power is capable of achieving quick backwash, and so as to save backwashing time and power consumption, and filtration treatment ability is big, water quality
It is good, the effect with efficient, energy-conservation and environmental protection.
In sum, the new lightweight filter medium, which can overcome the energy consumption of sand coarse aggregate ratio technology presence in prior art
It is high, filter cycle is short, efficiency is low, waste water processes are long, facility is huge, floor space increases, production management's difficulty and
Run a series of defect such as big.
Optionally, the proportion of the foam glass filtrate is 1.2～1.7kg/L.
Filtration is adsorbing result between particle and filtering material particle in water, adsorption depend mainly on filtrate and
The Surface Physical Chemistry property of granule in water, when in water, particle migration is on filter material surface, draws in Van der Waals force and electrostatic
Under power and some chemical bonds and special chemisorption, they are adsorbed onto on the surface of filtering material particle.Additionally, some waddings
The bridging action of particulates is also present simultaneously.Jing researchs show that the main still particle of filtration is with filtering material particle through migrating
Complete to remove the process of impurities in water with two processes of absorption.
With the increase of filtration time, filtering layer impurity trapped increases, and the loss of flood peak of filtering layer also increases therewith, its growth
, with filtering velocity size, the size and shape of filtering material particle, in filtered water inlet, suspension content and impurity trapped are in vertical direction for speed
Distribution depending on.When the water of certain property is processed, filtering velocity, the size of filtering material particle, influent quality, filtrate and thickness are correctly determined
Relation between degree, with important technical meaning and economic implications.Therefore, for filtration, selection of filtering material and physics
Form, property have vital impact to filter effect, and in prior art, (2.65kg/L is left than great for quartz sand filter media
It is right), expansion rate low (less than 50%), porosity low (less than 50%)；Therefore, more sufficiently backwash is not only difficult to,
And the power consumption backwash water yield that is high and producing is larger；It is especially in the presence of the defect in filtrate hardened (dead band).
In this application, 1.2～1.7kg/L is preferably limited to the proportion of foam glass filtrate, the bubble with the proportion
Foam glass filtrate, the specific surface area of foam glass filtrate is 25-35m2/ g, which is capable of achieving about 200% expansion rate, in water body
In the presence of turbulent flow and shearing force, easily peel away the condensation product being attached on filter material surface, be capable of achieving with less energy consumption
The effect of quick backwash, reduction backwashing time and water consumption.
Optionally, the natural packing unit weight of the foam glass filtrate is 0.5～1.0kg/L.
Optionally, the voidage of the foam glass filtrate is 60～78%.
Optionally, the specific surface area of the foam glass filtrate is 25-35m2/g。
Based on it is above-mentioned same the reasons why, the natural packing unit weight to foam glass filtrate, or to its voidage and Bi Biao
Area has carried out further restriction, on the one hand meets expansion rate requirement, on the other hand also improves the receiving suspension of filtering layer
The ability of pollutant, greatly improves its interception capacity and the filtration treatment in the unit interval to filtration Suspended Matter in Water
Amount.
A kind of described water process preparation method of lightweight filter medium, comprises the following steps：
1) mixed after, foaming agent, blowing agent promotor and modifying agent being added in fine glass powder, mixed
Raw material；
2), will carry out successively cooling down after the mixed material melt foaming, crush again and screen, obtain can be as water at
Foam glass of the reason with lightweight filter medium.
In the forwarding method, with discarded glass as initial feed, Jing is broken, crush (obtaining fine glass powder) and mixing etc.
Operation, then through inorganic non-metallic foam glass material made by melt foaming, cooling etc..After most Jing further crush,
The processing of the techniques such as screening is obtained novel light, random, multi-angular, high-specific surface area, high porosity, the new water process of porous
Artificial foam glass filtrate.Whole preparation method is easily achieved, and process conditions are easily controllable, and raw material is also easy to obtain.Tool
There is extraordinary practicality.
Optionally, in step 1) before, also include：
Discarded glass is crushed, obtain the glass fragment of 3-5mm, and the glass fragment be crushed to into particle diameter be
100-400 μm of fine glass powder.
For waste and old glass, by the way of first crushing and crushing afterwards, so as to realize the acquisition of fine glass powder, it is easy to
Mix homogeneously with other auxiliary agents, and efficiently utilize discarded glass.
Optionally, in step 1) in：
In terms of parts by weight, the fine glass powder is 93-97 parts, the foaming agent is 2-4 parts, foaming agent rush
It is 1-3 parts to enter agent and modifying agent.
In fine glass powder, foaming agent, blowing agent promotor and the modifying agent of specified weight number are added；Foaming agent
Accelerator has effect of fluxing (reduce the softening temperature of glass dust, viscosity declines and is conducive to foaming), can also increase glass
Surface tension, is conducive to stable and controls bubble, improve foam structure, makes uniform foam cell, tiny, is conducive to improving product strong
Degree.Appropriate modifying agent can improve the performance of foam glass, increase foaming temperature range, reduce intercommunicating pore, improve machinery strong
Degree, improves yield rate.
Optionally, the foaming agent includes carbon black, carborundum, Calcium Carbonate, dolomite dusts, phlogopite, graphite, manganese dioxide
In one or more；
The blowing agent promotor includes sodium nitrate, soda, Borax, prodan, sodium carbonate, the one kind in two ammonia salt of second
Or it is various；
The modifying agent is antimony oxide, sodium pyrophosphate, one or more in barium sulfate.
Several foaming agent of above-mentioned preferred restriction, promoter for blowing agent and modifying agent, the hole of the foam glass made by which
Footpath, the thickness of hole wall, foam structure and mechanical strength etc. can be met well as performance requirement during filtrate.Which is made
Foam glass filtering material particle proportion and unit weight it is little, and specific surface area is big, cutting with good expansion character and float
Stay ability.
Optionally, in step 3) in, the process of the melt foaming is specifically included：
Melt foaming equipment is risen to into 600-1100 DEG C with 10 DEG C/min of programming rate, and the 2-4 hours that foam；
And/or；
The granularity crushed again is 0.5-1.0 millimeters.
During melt foaming, for the in-furnace temperature of melt foaming equipment (melt foaming stove), preferably with 10 DEG C/
The programming rate of minute rises to 600-1100 DEG C, and the heating rate and terminal blowing temperature can ensure that mixed material has foamed
Entirely.And foamed time is controlled in 2-4 hours, it is however generally that, when melt foaming temperature is relatively low, foamed time is longer；Instead
It, when melt foaming temperature is relatively high, the time of foaming is slightly long.
In addition, during cooling, in order to ensure the performance of foam glass, preferably by natural cooling, the cooling
Mode is slow, flexible, can prevent from being quenched and causing properties of product to change.Finally, crushed after the completion of cooling again
During, the crushing material obtained after foaming, cooling (can be screened according to actual needs into the granule of 0.5-1.0 millimeters
Go out the filtrate of different-grain diameter), to meet which as the application demand of filtrate.
Described water process foam glass made by the preparation method of lightweight filter medium is in as water filtration media
Application.
Compared with prior art, beneficial effects of the present invention are：
(1), the present invention provide this water process with lightweight filter medium because of foam glass filtrate light specific gravity, backwash
When, it is easy to make filter material layer expand (highest expansion rate 200%), in the presence of water body turbulent flow and shearing force, easily make to be attached to
Condensation product on filter material surface is peeled away, and is capable of achieving quick backwash, so as to reduce significantly backwashing time and water consumption.
(2), at present, the conventional sand filtering device in scale water chemical treatment, as the quartz sand as filtrate is than great, instead
During flushing, filter material layer expansion rate can only be also made to reach 50% (quartz sand is difficult to be stirred) with larger power, so backwash
Power consumption is high, effect is poor.And when adding flocculant (or coagulant) and carrying out micro flocculating filter, suspend due to filtering in water body
The increase of thing content so that filtering layer is more difficult to expand, easily produces hardened (dead band) of filtering layer blocking and filtrate.Therefore, exist
In the large-scale sand filtering device of scale water chemical treatment, it is virtually impossible to adopt " direct micro flocculating filter " technology.To improve effluent quality
During tiny flocculation technique to be increased, " coagulation-sedimentation-filtration " technique can only be adopted, Sedimentation tank so need to be just set up, so not only be increased
Handling process is grown, and increased the floor space of one-time investment and treatment facility.
And when using the present invention provide this foam glass as filtrate when, due to the proportion of filtrate it is little, during backwash,
The expansion rate of filter material layer is up to 200%, and suspension pollutant is peeled off from filter material surface, can carry out direct tiny flocculation mistake
Filter, so as to by, makes handling process become simply (to eliminate settling operation and realize the relevant device of the operation), and can carry
High effluent quality.
(3) impurity suspended in referring to filtrate trap water, is filtered, so that water obtains the technical process clarified.Filter
Process is adsorbing result between particle and filtering material particle in water, and adsorption depends mainly on granule in filtrate and water
Surface Physical Chemistry property, when in water, particle migration is on filter material surface, Van der Waals force and electrostatic attraction and certain
Under a little chemical bonds and special chemisorption, they are adsorbed onto on the surface of filtering material particle.This bubble that the present invention is provided
Foam glass filter material surface is rough and uneven in surface, and there is multi-angular, bigger serface (to be 35m to the maximum2/ g), porous so as to filter
The ability of retention float is greatly enhanced.When under equal conditions, using foam glass filtrate, than adopting quartz sand filter media
Retaining power when (surface relative smooth) is strong, more can ensure its effluent quality requirement.
(4), this foam glass filtrate that the present invention is provided, its voidage height (60～78%) and porous, are made
For filtrate when, its rate of filtration can reach 20-30m/hr (under equal conditions, conventional sand filtration filtering velocity be 6-10m/hr), be conventional
3 times of sand filtration filtering velocity, therefore, the volume of filtration facility can be not only greatly reduced, the floor space of facility can be also saved.
(5), the present invention in, using foam glass as filtrate after, quick backwash can be realized with less energy consumption, save
Saved backwashing time, simultaneously because filtration treatment ability is big, cycle length, water quality are good, can reach efficiently, the purpose of energy-conservation.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
Accompanying drawing to be used needed for having technology description is briefly described.
Microscopy figures of the Fig. 1 for water process lightweight filter medium (foam glass) for providing of the invention under the microscope；
Fig. 2 is existing quartz sand microscopy figure under the microscope.
Specific embodiment
Embodiment of the present invention is described in detail below in conjunction with embodiment, but those skilled in the art will
Understand, the following example is merely to illustrate the present invention, and is not construed as limiting the scope of the present invention.It is unreceipted concrete in embodiment
Condition person, the condition advised according to normal condition or manufacturer are carried out.Agents useful for same or the unreceipted production firm person of instrument, are
The conventional products that commercially available purchase is obtained can be passed through.
The invention provides a kind of water process lightweight filter medium, the filter medium is foam glass, and the foam glass
Proportion under glass filtrate wet condition is 1.2～1.7kg/L.
In the scheme being more highly preferred to, in order to further improve filter medium expansion rate in use, or,
Improve its interception capacity and the rate of filtration to float in water simultaneously, the natural packing unit weight of preferred foam glass filtrate is
0.5～0.9kg/L, porosity are 60～78%, and specific surface area is 25-35m2/g。
Next, enumerating embodiment in detail below to the preparation method of the water process lightweight filter medium of the present invention.
Embodiment 1
Add in fine glass powder (directly buying, about 400 μm of particle diameter) foaming agent (magnesium carbonate or sodium bicarbonate),
Mixed after blowing agent promotor (Borax) and modifying agent (barium sulfate), obtained mixed material；
Cooling will be carried out after mixed material melt foaming (being not less than 600 DEG C) successively and crushed again, screened, obtain making
For the foam glass of water process lightweight filter medium.
Embodiment 2
Discarded glass is crushed, obtain the glass fragment of 3-5mm, and the glass fragment be crushed to into particle diameter be
100-400 μm of fine glass powder；
Add in the fine glass powder of 97 weight portions foaming agent 2 parts of (carbon black), blowing agent promotor (sodium nitrate) and
Modifying agent (sodium pyrophosphate) is mixed after 1 part totally, obtains mixed material；
Cooling will be carried out after mixed material melt foaming successively and crushed again, obtain foam glass；Wherein, melt foaming
During, melt foaming stove is risen to into 600 DEG C with 10 DEG C/min of programming rate, and the 3-4 hours that foam.
Embodiment 3
Discarded glass is crushed, the glass fragment of 3-5mm is obtained, and the glass fragment is crushed using pulverizer
To the fine glass powder that particle diameter is 100-400 μm；
3 parts of foaming agent (carborundum), blowing agent promotor (hexafluosilicic acid are added in the fine glass powder of 95 weight portions
Sodium) and modifying agent (antimony oxide) mixed after totally 2 parts (equal proportions), obtain mixed material；
By natural cooling and again crushing (granularity is 0.5-1.0 millimeters) successively after mixed material melt foaming, steeped
Foam glass；Wherein, during melt foaming, melt foaming stove is risen to into 1000 DEG C with 10 DEG C/min of programming rate, concurrently
Bubble 2-3 hours.
Embodiment 4
Discarded glass is crushed, obtain the glass fragment of 3-5mm, and the glass fragment be crushed to into particle diameter be
100-400 μm of fine glass powder；
4 parts of foaming agent (phlogopite), blowing agent promotor (second diamino are added in the fine glass powder of 93 weight portions
Salt) and modifying agent (barium sulfate) mixed after totally 3 parts (equal proportions), obtain mixed material；
Natural cooling will be carried out after mixed material melt foaming successively and (grinding particle size is with embodiment 3) is crushed again, obtained
To foam glass；Wherein, during melt foaming, melt foaming stove is risen to into 900 DEG C with 10 DEG C/min of programming rate,
And the 2-3 hours that foam.
Embodiment 5
Discarded glass is crushed, obtain the glass fragment of 3-5mm, and the glass fragment be crushed to into particle diameter be
100-400 μm of fine glass powder；
3 parts of foaming agent (manganese dioxide), blowing agent promotor (soda) are added in the fine glass powder of 95 weight portions
With mixed after modifying agent (sodium pyrophosphate) totally 2 parts (equal proportions), obtain mixed material；
Natural cooling and will be crushed again after mixed material melt foaming successively, obtain foam glass；Wherein, melt foaming
During, melt foaming stove is risen to into 800 DEG C with 10 DEG C/min of programming rate, and the 3-4 hours that foam.
Embodiment 6
Discarded glass is crushed, the glass fragment of 3-5mm is obtained, and the glass fragment is crushed using pulverizer
To the fine glass powder that particle diameter is 100-400 μm；
Foaming agent (soda, Borax, the mixing of prodan equal proportion) 3 is added in the fine glass powder of 96 weight portions
Part, blowing agent promotor (prodan) and modifying agent (antimony oxide) mixed after totally 1 part (equal proportion), mixed
Raw material；
By natural cooling and again crushing (granularity is 0.5-1.0 millimeters) successively after mixed material melt foaming, obtaining can
As the water process foam glass filtrate of lightweight filter medium；Wherein, during melt foaming, by melt foaming stove with 10
DEG C/min programming rate rise to 1000 DEG C, and foam 2 hours.
It should be noted that in the present invention, for the preparation of foam glass, can also adopt with existing foam glass
The defect ware and tailing that production of construction materials corporate earning is arrived is raw material, through crushing and screening, obtains the bubble of required particle diameter
Foam glass filtrate.
In addition, physicochemical property measure is carried out to the foam glass that various embodiments of the present invention are obtained, its result reference table 1：
1 various embodiments of the present invention of table provide foam glass filtrate performance and its compare
| Project | Proportion (kg/L) | Unit weight (kg/L) | Porosity | Expansion rate | Wear rate (%) | Acid resistance (%) |
| Embodiment 1 | 1.7 | 0.8 | 65～78% | It is close to 200% | Less than 0.03 | More than 99 |
| Embodiment 2 | 1.2 | 0.5 | 70～75% | It is close to 200% | Less than 0.03 | More than 99 |
| Embodiment 3 | 1.3 | 0.6 | 75～78% | It is close to 200% | Less than 0.03 | More than 99 |
| Embodiment 4 | 1.5 | 0.7 | 70～78% | It is close to 200% | Less than 0.03 | More than 99 |
| Embodiment 5 | 1.4 | 0.8 | 60～75% | It is close to 200% | Less than 0.03 | More than 99 |
| Embodiment 6 | 1.3 | 0.8 | 68～75% | It is close to 200% | Less than 0.03 | More than 99 |
| Quartz sand | 2.65 | 1.95 | Less than 50% | 50% | 0.03 | 98 |
In addition, with the biochemical treatment water outlet of Jilin Chemical Industry Company sewage treatment plant as object, with the embodiment of the present invention 3
Foam glass and the quartz sand of routine be filtrate, carrying out using direct micro flocculating filter and same time, with the conditions of
Contrast, the results detailed in table 2 below.
The filtrate that 2 present invention of table is provided is contrasted with the filter result of traditional filter material
Additionally, the foam glass filtrate for providing the embodiment of the present invention 3 and quartz sand (comparative example) are used as filtrate, identical
Under conditions of carry out water filtration contrast experiment, through experiment find, during using foam glass as filtrate, there is no filtrate plate in which
The phenomenon of knot, and backwash is easily, can greatly save backwash water consumption and gas consumption (concrete outcome refers to table 2)；
And quartz sand filter media is present, and filtrate is hardened, clogging, need frequently to carry out backwash, water consumption is serious (several times), and process phase
It is long with the time used by the water yield.And, by micro- sem observation, the surface structure of foam glass and quartz sand is observed,
It was found that foam glass filtrate prepared by the embodiment has irregular, multi-angular, high-specific surface area, high porosity and porous,
Which is huge with the surface structure difference of quartz sand, specifically refer to Fig. 1 and Fig. 2.
It can be seen from Table 1 that, its proportion of foam glass made by each embodiment and unit weight that the present invention is provided is little, empty
Gap rate is big, and specific surface area is big, and during application, the rate of filtration is fast, backwash is easy, retaining power is strong, therefore, tool
There is extraordinary using value, be that one kind has at irregular, multi-angular, bigger serface, high voidage, porous new type water
The reason artificial foam glass filtrate of lightweight, can reach the efficient, purpose of energy-conservation.
Although with specific embodiment illustrate and describing the present invention, but it will be appreciated that without departing substantially from the present invention's
Many other changes and modification can be made in the case of spirit and scope.It is, therefore, intended that in the following claims
Including all such changes and modifications belonged in the scope of the invention.
Claims (3)
1. application of a kind of lightweight filter medium in water process, it is characterised in that the water process lightweight filter medium is
Granular foam glass：
The voidage of the foam glass is 60～78%；
The proportion of the foam glass is 1.2～1.7kg/L；
The rate of filtration of the foam glass is 20-30m/hr；
The expansion rate of the foam glass is 200%；
The granularity of the foam glass is 0.5-1.0 millimeters；
The preparation method of the lightweight filter medium, comprises the following steps：
1) mixed after, foaming agent, blowing agent promotor and modifying agent being added in fine glass powder, obtained mixing former
Material；
2), will carry out successively cooling down after the mixed material melt foaming, crush again and screen, obtain to use as water process
The foam glass of lightweight filter medium；
In step 1) before, also include：
Discarded glass is crushed, the glass fragment of 3-5mm is obtained, and the glass fragment is crushed to into particle diameter for 100-
400 μm of fine glass powder；
In step 1) in：
In terms of parts by weight, the fine glass powder is 93-97 parts, the foaming agent is 2-4 parts, the blowing agent promotor
It is 1-3 parts with modifying agent；
The foaming agent include the one kind in carbon black, carborundum, Calcium Carbonate, dolomite dusts, phlogopite, graphite, manganese dioxide or
It is various；
The blowing agent promotor includes sodium nitrate, soda, Borax, prodan, sodium carbonate, the one kind or many in two ammonia salt of second
Kind；
The modifying agent is antimony oxide, sodium pyrophosphate, one or more in barium sulfate；
In step 2) in, the process of the melt foaming is specifically included：
Melt foaming equipment is risen to into 600-1100 DEG C with 10 DEG C/min of programming rate, and the 2-4 hours that foam；
And/or；
The granularity crushed again is 0.5-1.0 millimeters.
2. application of the lightweight filter medium according to claim 1 in water process, it is characterised in that the foam glass
Natural packing unit weight be 0.5～0.9kg/L.
3. application of the lightweight filter medium according to claim 1 in water process, it is characterised in that the foam glass
Specific surface area be 25-35m2/g。
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| CN107572830B (en) * | 2017-10-18 | 2019-01-08 | 崔旸 | A kind of lightweight modified filter material and its preparation method and application |
| CN109650728A (en) * | 2018-11-15 | 2019-04-19 | 深圳市优力凯环保生物技术有限公司 | A kind of foamed glass material and preparation method thereof to purify water |
| CN111097230B (en) * | 2019-12-31 | 2022-02-11 | 浙江金龙自控设备有限公司 | Modified glass filter material for oilfield sewage treatment and preparation method thereof |
| CN113185024B (en) * | 2021-04-25 | 2022-11-25 | 北京魔砂科技有限公司 | Method for purifying condensed water |
| CN116059739B (en) * | 2023-03-06 | 2024-02-27 | 山东华城工程技术有限公司 | Silver-doped surface-modified multifunctional filter material and preparation method and application thereof |
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