CN103157437B - A kind of filter aid and renovation process thereof - Google Patents
A kind of filter aid and renovation process thereof Download PDFInfo
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- CN103157437B CN103157437B CN201310117965.4A CN201310117965A CN103157437B CN 103157437 B CN103157437 B CN 103157437B CN 201310117965 A CN201310117965 A CN 201310117965A CN 103157437 B CN103157437 B CN 103157437B
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- flyash
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- slag
- salt
- lime
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- 238000000034 method Methods 0.000 title claims description 26
- 230000008569 process Effects 0.000 title claims description 25
- 238000009418 renovation Methods 0.000 title claims description 20
- 239000010881 fly ash Substances 0.000 claims abstract description 146
- 239000002893 slag Substances 0.000 claims abstract description 59
- 150000003839 salts Chemical class 0.000 claims abstract description 23
- 239000004571 lime Substances 0.000 claims abstract description 17
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 16
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 16
- 239000003513 alkali Substances 0.000 claims abstract description 16
- 238000009835 boiling Methods 0.000 claims abstract description 16
- 239000004575 stone Substances 0.000 claims abstract description 9
- 238000004140 cleaning Methods 0.000 claims abstract description 6
- 238000005554 pickling Methods 0.000 claims abstract description 6
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims abstract description 4
- 239000002253 acid Substances 0.000 claims abstract description 4
- 238000010438 heat treatment Methods 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 31
- 239000007788 liquid Substances 0.000 claims description 28
- 239000000203 mixture Substances 0.000 claims description 24
- 238000001914 filtration Methods 0.000 claims description 19
- 239000007787 solid Substances 0.000 claims description 16
- 239000012065 filter cake Substances 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 12
- 239000000843 powder Substances 0.000 claims description 11
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 claims description 8
- 239000001099 ammonium carbonate Substances 0.000 claims description 8
- 235000012501 ammonium carbonate Nutrition 0.000 claims description 7
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 6
- 230000018044 dehydration Effects 0.000 claims description 5
- 238000006297 dehydration reaction Methods 0.000 claims description 5
- 206010013786 Dry skin Diseases 0.000 claims description 4
- 239000005708 Sodium hypochlorite Substances 0.000 claims description 3
- 102000004169 proteins and genes Human genes 0.000 claims description 3
- 108090000623 proteins and genes Proteins 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- 210000005253 yeast cell Anatomy 0.000 claims description 3
- 239000000376 reactant Substances 0.000 claims description 2
- 238000002791 soaking Methods 0.000 claims description 2
- 235000013405 beer Nutrition 0.000 abstract description 15
- 239000000126 substance Substances 0.000 abstract description 5
- 238000009923 sugaring Methods 0.000 abstract description 5
- 239000002994 raw material Substances 0.000 abstract description 3
- 230000008929 regeneration Effects 0.000 description 40
- 238000011069 regeneration method Methods 0.000 description 40
- 239000010883 coal ash Substances 0.000 description 27
- 239000011265 semifinished product Substances 0.000 description 16
- 239000000243 solution Substances 0.000 description 16
- 239000000920 calcium hydroxide Substances 0.000 description 15
- 235000011116 calcium hydroxide Nutrition 0.000 description 15
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 15
- 239000003245 coal Substances 0.000 description 14
- 230000000694 effects Effects 0.000 description 14
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 12
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 10
- 230000008859 change Effects 0.000 description 10
- 230000008439 repair process Effects 0.000 description 9
- 239000002002 slurry Substances 0.000 description 8
- 238000007667 floating Methods 0.000 description 7
- 239000012535 impurity Substances 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000002156 mixing Methods 0.000 description 7
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 6
- 239000000706 filtrate Substances 0.000 description 6
- 239000007789 gas Substances 0.000 description 6
- 230000001172 regenerating effect Effects 0.000 description 6
- 238000003756 stirring Methods 0.000 description 6
- 238000004131 Bayer process Methods 0.000 description 5
- 229910004298 SiO 2 Inorganic materials 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 4
- 150000003863 ammonium salts Chemical group 0.000 description 4
- 239000011268 mixed slurry Substances 0.000 description 4
- 239000002910 solid waste Substances 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 3
- 239000008367 deionised water Substances 0.000 description 3
- 229910021641 deionized water Inorganic materials 0.000 description 3
- 239000012153 distilled water Substances 0.000 description 3
- 238000000227 grinding Methods 0.000 description 3
- 238000007885 magnetic separation Methods 0.000 description 3
- 239000004570 mortar (masonry) Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 238000012827 research and development Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 description 2
- 235000013361 beverage Nutrition 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000003818 cinder Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
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- 239000003973 paint Substances 0.000 description 2
- 210000000582 semen Anatomy 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 229910001388 sodium aluminate Inorganic materials 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910000013 Ammonium bicarbonate Inorganic materials 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- 240000008067 Cucumis sativus Species 0.000 description 1
- 235000010799 Cucumis sativus var sativus Nutrition 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000002156 adsorbate Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 235000012538 ammonium bicarbonate Nutrition 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000004380 ashing Methods 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 229910001570 bauxite Inorganic materials 0.000 description 1
- 210000000481 breast Anatomy 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 239000000404 calcium aluminium silicate Substances 0.000 description 1
- 235000012215 calcium aluminium silicate Nutrition 0.000 description 1
- WNCYAPRTYDMSFP-UHFFFAOYSA-N calcium aluminosilicate Chemical compound [Al+3].[Al+3].[Ca+2].[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O WNCYAPRTYDMSFP-UHFFFAOYSA-N 0.000 description 1
- 229940078583 calcium aluminosilicate Drugs 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- HOOWDPSAHIOHCC-UHFFFAOYSA-N dialuminum tricalcium oxygen(2-) Chemical compound [O--].[O--].[O--].[O--].[O--].[O--].[Al+3].[Al+3].[Ca++].[Ca++].[Ca++] HOOWDPSAHIOHCC-UHFFFAOYSA-N 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- DNJIEGIFACGWOD-UHFFFAOYSA-N ethanethiol Chemical compound CCS DNJIEGIFACGWOD-UHFFFAOYSA-N 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000000386 microscopy Methods 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000012452 mother liquor Substances 0.000 description 1
- 230000009965 odorless effect Effects 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000011833 salt mixture Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 238000000967 suction filtration Methods 0.000 description 1
- -1 sugaring Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
Landscapes
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention provides a kind of filter aid, comprise flyash or slag, flyash described in pretreatment or slag, described pretreatment comprises: described flyash or slag are carried out pickling or alkali cleaning, controls soda acid mass percent concentration 0.1% ~ 0.8% simultaneously; Or interpolation lime, control that described lime-crushed stone pile is described flyash or slag weight 0.1% ~ 0.5% simultaneously; Or add salt or alkali, the addition of described salt or alkali is 0.05 ~ 1% of described flyash or slag quality; Or interpolation salt, the addition of described salt is 1% ~ 10% of described flyash or slag quality, and will with the addition of the flyash of described salt or slag in 90 ~ 200 DEG C of boiling 1 ~ 5h under air-proof condition, wherein, described salt heating can produce gas.Filter aid provided by the invention, with flyash and slag for raw material, can be widely used in coloured, sugaring, beer, chemical industry and other industry.
Description
Technical field
The present invention relates to filtration art, particularly a kind of filter aid and renovation process thereof.
Background technology
Often adopt in bayer process and in thick liquid, add lime or milk of lime carries out thick liquid drainage.Sodium aluminate solution and lime reaction generate tricalcium aluminate or calcium aluminosilicate hydrate, have the advantages that hardness is high, particle is large, loose porous, can increase gas porosity and gas permeability that thick liquid filters rear filter cake, reduce filtration resistance, improve the production capacity of filter.
Along with the enhancing of various countries' protection mineral resources consciousness; be now downward trend with bauxite grade, cause red-mud separation sedimenting system processing load to strengthen, in thick liquid, floating material content increases; crude liquor of sodium aluminate strainability is deteriorated, and what have impact on thick liquid refining step passes through flow.Increase the consumption of milk of lime to alleviate the filter pressure of liquid filter, causing milk of lime consumption increases, and the loss of solution oxide aluminium increases.Therefore be badly in need of a kind of new type filter aid and substitute milk of lime.
At sugaring, papermaking, beverage, brewage and in the industry such as paint, also widely use filter aid, filter aid plays very important effect in these industries are filtered, and is the emphasis of research always, and is constantly improved.Again due to worldwide shortage of water resources and antipollution requirement, make papermaking, beverage, brewage, grease, sugaring, organic solvent, many industries such as medicine and paint must closed cycle water system.In this case, from the viewpoint of economize energy, the processing load reducing slurry consumption and minimizing draining, most economical way uses to regenerate retention and drainage aid agent efficiently.This just needs choice and application and the regeneration of conscientiously examining filter filter aid.
Meanwhile, in known various energy resources, coal resources are the abundantest, but the coal-fired solid waste flyash that produces and slag also countless.Although since the sixties in 20th century, Chinese scholars and engineers and technicians have carried out a large amount of comprehensive utilization deep processing research to flyash, but it is known to investigate domestic and foreign literature report, flyash but mainly concentrates on cement manufacture, builds, builds dam, concrete mixture, the aspect such as materials for wall (brick, watt, plate, block).In other words, are all the research on utilization it being carried out low value as trade waste, and seldom using its as resource be applied to other field carry out research and development utilize, especially domestic all the more so.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of filter aid, and what solve that the coal-fired solid waste coal powder that produces and slag exist utilizes the problem that level is low, utilization ratio is not high.
For solving the problems of the technologies described above, the invention provides a kind of filter aid, comprising flyash or slag, flyash described in pretreatment or slag, described pretreatment comprises:
Described flyash or slag are carried out pickling or alkali cleaning, controls soda acid mass percent concentration 0.1% ~ 0.8% simultaneously;
Or interpolation lime, control that described lime-crushed stone pile is described flyash or slag weight 0.1% ~ 0.5% simultaneously;
Or add salt or alkali, the addition of described salt or alkali is 0.05 ~ 1% of described flyash or slag quality;
Or interpolation salt, the addition of described salt is 1% ~ 10% of described flyash or slag quality, and will with the addition of the flyash of described salt or slag in 90 ~ 200 DEG C of boiling 1 ~ 5h under air-proof condition, wherein, described salt heating can produce gas.
Further, if by described flyash and slag dry powder blend, the mixed proportion of described flyash and slag dry powder is 1:1 ~ 1:5.
Further, described flyash or the percentage composition of slag in described filter aid are 90% to 99.9%.
In order to solve the problem, present invention also offers the renovation process of filter aid, described renovation process comprises:
Control used described filter aid at 120 ~ 200 DEG C of drying 1 ~ 5h;
Or control used described filter aid and calcine 2 ~ 5h at 200 ~ 500 DEG C;
Or by used described filter aid and carbon dioxide gas and water 80 ~ 200 DEG C of boiling 1 ~ 5h;
Or used described filter aid and carbonate, bicarbonate and water 80 ~ 200 DEG C of boiling 1 ~ 5h;
Or by the strong oxidizer aqueous solution of used described filter aid and mass percent concentration 0.2 ~ 1.5%, as aqueous sodium hypochlorite solution, hydrogen peroxide etc., under room temperature, soak 1 ~ 5h.
Filter aid provided by the invention, with flyash and slag for raw material, because flyash and slag specific area larger, add and also there is certain active group, thus there is very large physical absorption ability and certain chemisorbed performance simultaneously, can be widely used in coloured, sugaring, beer, chemical industry and other industry, not only cheap, meeting the wilderness demand of industrial filter, and achieve recirculation and reuse, is a kind of filter aid of green.The research and development application of this filter aid achieves the value added applications of solid waste.
Detailed description of the invention
In order to improve the added value of flyash and slag, expand the application of flyash and slag, filter aid provided by the invention, with flyash or slag for raw material, and pretreatment is carried out to flyash or slag, this pretreatment comprises: flyash or slag are carried out pickling or alkali cleaning, controls soda acid mass percent concentration 0.1% ~ 0.8% simultaneously; Or interpolation lime, control lime-crushed stone pile is 0.1% ~ 0.5% of flyash or slag weight simultaneously; Or add salt or alkali, the addition of salt or alkali is 0.05 ~ 1% of flyash or slag quality; Or add the salt that heating can produce gas, as ammonium carbonate, carbonic hydroammonium etc., the described addition that can produce the salt of gas is 1% ~ 10% of described flyash or slag quality, and under air-proof condition, the flyash or slag that with the addition of salt is heated 1 ~ 5h in 90 ~ 200 DEG C.If by the dry powder blend of described flyash and slag, the mixed proportion of flyash and slag dry powder is 1:1 ~ 1:5.In addition, flyash or the slag percentage composition in filter aid is 90% to 99.9%.Simultaneously according to the specific field of filter aid application, carry out comprising the technical finesses such as grading, activity excitation, purification or surface treatment, flyash new type filter aid in sugar manufacturing industry, beer industry, chemical industry and other industry, and should can be widely used in alumina producing Bayer process industry.
In the process using filter aid provided by the invention, the filter aid that discovery flyash and slag make after a procedure, great changes will take place for the material composition of itself, just adsorb Cucumber, if as waste discharge, not only very unfortunate, and cause product cost to improve and secondary pollution, therefore present invention also offers the renovation process of this filter aid, this renovation process comprises: control used filter aid at 150 ~ 200 DEG C of drying 1 ~ 5h; Or control used filter aid and calcine 2 ~ 5h at 200 ~ 500 DEG C; Or used described filter aid and carbonate, bicarbonate and water 80 ~ 200 DEG C of boiling 1 ~ 5h; Or by the strong oxidizer aqueous solution of used described filter aid and mass percent concentration 0.2 ~ 1.5%, as clorox, hydrogen peroxide etc., under room temperature, soak 1 ~ 5h.
Example one
Produce the filter aid for beer drainage that the embodiment of the present invention provides:
Powdered coal ash becomes the semi-finished product of 2 ~ 40 μm through magnetic separation removal of impurities, grinding.In solid-to-liquid ratio 1: 10, sour mass percent concentration is 0.6%, temperature 120 DEG C, pressure 1.2 atmospheric pressure, under the condition of time 60min, uses hydrochloric acid solution to dissolve semi-finished product, filter; Use pure water (distilled water, deionized water etc.) rinsing afterwards, or carry out rinsing with beer solutions.Flyash after dehydration and rinsing, dries to constant weight at being placed in 110 DEG C, obtains filter aid provided by the invention, be i.e. flyash filter aid.
Flyash clean for purification processes is carried out classification process, and in level grain, the particulate of 2 ~ 20um accounts for 80%, filters beer per ton and consumes flyash filter aid 0.77 ~ 1.0 kilogram of batching.
The regenerative process of filter aid: the renovation process adopting filter aid provided by the invention, mix with the flyash filter aid 100g with stench mistake with the aqueous sodium hypochlorite solution 250ml (containing NaOH about 1%) of 1.2% and 0.6% concentration, 1.5h is stirred with agitator under room temperature, add the water soaking of about one times of reactant volume again, leave standstill 1h hypsokinesis and remove clear liquid, filtration washing flyash, 200 DEG C of bake dryings, to constant weight, obtain the filter aid (sample 1 namely in table 1 and sample 2) after regenerating.The equal odorless of regeneration filter aid flyash sample after treated oven dry.
The filter aid do not regenerated is tested with regeneration filter aid performance comparison: after measured, the various physical property of filter aid after regeneration is all suitable with the filter aid do not regenerated (i.e. new coal powder), some indexs even exceed new flyash, illustrate that adsorbate has all decomposed and absorbed by flyash after above-mentioned process, recovered activity, new flyash filter aid and regeneration flyash filter aid filter-aid performance specific targets are in table 1:
Table 1
Upper table result illustrates, after adding filter aid provided by the invention, actual filtering velocity enlarges markedly, and improves nearly one times; No matter be new flyash or the flyash after regenerating, significantly can improve the strainability of beer mother liquor; Under clorox 1.2% and 0.6% concentration, the indices majority of the activity of the sample 1 and 2 after regeneration is better.Wherein the clorox of 0.6% concentration is due to when relatively less with chemical agent, regeneration activity is relatively especially good, known, with 0.6% clorox (its density is bordering on 1) be that to regenerate flyash effect under 2.5:1 condition better with the flyash weight of material ratio crossed.
Example two
Produce the filter aid that the embodiment of the present invention is provided for beer drainage:
Powdered coal ash becomes the semi-finished product of 2 ~ 40 μm through magnetic separation removal of impurities, grinding.In solid-to-liquid ratio 1: 10, sour mass percent concentration is 0.6%, temperature 120 DEG C, pressure 1.2 atmospheric pressure, under the condition of time 60min, uses hydrochloric acid solution to dissolve semi-finished product, filter; Use pure water (distilled water, deionized water etc.) rinsing afterwards, or carry out rinsing with beer solutions.Flyash after dehydration and rinsing, dries to constant weight at being placed in 110 DEG C, obtains filter aid provided by the invention, be i.e. flyash filter aid.
Flyash clean for purification processes is carried out classification process, and in level grain, the particulate of 2 ~ 20um accounts for 80%, filters beer per ton and consumes flyash filter aid 0.77 ~ 1.0 kilogram of batching.
The regenerative process of filter aid: by the flyash that Buchner funnel unloads, adopt the renovation process of filter aid provided by the invention, first washing, pickling again (sour mass percent concentration is 0.3%), alkali cleaning (alkali mass percent concentration is 0.4%), wash away be embedded between flyash not easily by the protein that water-washes away and yeast cells, more in an oven 200 DEG C of bake dryings to constant weight.Flyash complete for regeneration activating and unworn fresh coal fly ash are made comparisons from outward appearance and physicochemical properties aspect, result shows: flyash color and the outward appearance of new flyash and activation are close, equal free from extraneous odour; The flyash housing that this group of microscopy has activated is clear, without bacterium, yeast cells and protein cold sludge.
The filter aid do not regenerated test with regeneration filter aid performance comparison: this activate after flyash for filtration experiment, effect is more satisfactory, can reach the requirement of beer filtering-aid agent; The new filter aid of flyash, flyash regeneration filter aid beer, the change of wine liquid quality index is in table 2:
Table 2
As shown in Table 2, after adding flyash filter aid and regeneration flyash filter aid, before and after filtering, beer physical and chemical index is without marked change, and beer turbidity is lower than 0.5EBC, reaches filtering requirement.
Example three
Produce the filter aid of the embodiment of the present invention for citric acid fermentation broth drainage
Powdered coal ash becomes the semi-finished product of 40 μm through magnetic separation removal of impurities, grinding.In solid-to-liquid ratio 1: 10, sour mass percent concentration is 0.6%, temperature 120 DEG C, pressure 1.2 atmospheric pressure, under the condition of time 60min, uses hydrochloric acid solution to dissolve semi-finished product, filter; Use pure water (distilled water, deionized water etc.) rinsing afterwards, or carry out rinsing with citric acid solution.Flyash after dehydration and rinsing, dries to constant weight at being placed in 110 DEG C, obtains filter aid provided by the invention, be i.e. flyash filter aid.
The regenerative process of filter aid: the renovation process adopting filter aid provided by the invention, used flyash filter aid is calcined 2-5h at 450 DEG C, and by ammonium carbonate solution 120 DEG C of boiling 2h of calcined material and mass percent concentration 5%, dry to constant weight at filter cake after filtering means dehydration 110 DEG C, obtain regeneration filter aid provided by the invention, i.e. flyash regeneration filter aid.
In 3 Buchner funnels, the upper two layers of filter paper of pad respectively; And on the filter paper of three funnels, do not lay (1#) respectively, lay the thick filter aid of about 1mm (i.e. new flyash) (2#), lay the thick regeneration filter aid (3#) of 1mm, then suction filtration takes from the citric acid fermentation broth of the citric acid content 12% of certain factory.Wherein, regeneration flyash is that after filtering citric acid, regeneration processes the flyash obtained.Drainage effect is as following table 3:
Table 3
As can be seen from Table 3, after adding a little flyash filter aid, filtering velocity significantly improves, and the flyash drainage speed of regeneration is better.Meanwhile, as can be seen from Table 4, after adding flyash filter aid, carry out impurity analysis with filtrate when not adding filter aid, add the filtrate after filter aid, impurity content obviously declines, and colourity also shoals, and regeneration flyash better effects if, table 4 is as follows:
Table 4
Example four
Produce the filter aid of the embodiment of the present invention for the thick liquid drainage of aluminium oxide Bayer process
Powdered coal ash, through 325 order vibratory sieve gradings, gets the semi-finished product that namely sieve upper part obtains being greater than 45 μm.By the semi-finished product of 45 μm and mass percent concentration be 0.1% ammonia spirit (ammoniacal liquor is weak base) mix, make solid containing for 60% coal ash pulp, 2h is soaked in 90 DEG C under condition of normal pressure, filter cake after filtration is placed in 110 DEG C, baking oven and dries to constant weight, and obtains filter aid provided by the invention.
The regenerative process of filter aid: by used flyash filter aid, adopt renovation process provided by the invention, with water be made into solid containing for 60% coal-water mixture, and add the carbonic hydroammonium of flyash quality than 3% ~ 5%, in closed container, in 120 DEG C of boiling 2h, filter the filter cake that obtains in baking oven 150 DEG C dry to constant weight, flyash filter aid must be regenerated.
By former for certain density power plant coal ash pulp (i.e. filter aid), regeneration coal ash pulp (namely regenerating filter aid), respectively takes appropriate, join in the thick liquid of 1000ml Bayer and react 60 minutes, investigate its filter-aid performance and filtrate component, control temperature 99.5 DEG C, stir 300r/m.Drainage effect is as follows:
Table 5
Known by table 5, after adding a little flyash filter aid slurry, the thick liquid filtering velocity of Bayer significantly improves, and the flyash drainage speed of regeneration is better, and compared with original production milk of lime used, difference is little.As shown in Table 6, add certain density coal ash pulp and regeneration coal ash pulp, before and after drainage, the change of solution composition is little; Compared with original production milk of lime, Al
2o
3, SiO
2concentration and α k have no significant change.
Table 6
Example five
Produce the filter aid of the embodiment of the present invention for the thick liquid drainage of aluminium oxide Bayer process
Powdered coal ash, through 325 order vibratory sieve gradings, gets the semi-finished product that namely sieve upper part obtains being greater than 45 μm.The semi-finished product being greater than 45 μm are mixed with the ammonium carbonate (ammonium carbonate is ammonium salt) for flyash quality 1%, obtains filter aid provided by the invention.
The regenerative process of filter aid: by used flyash filter aid, adopt renovation process provided by the invention, with water be made into solid containing for 60% coal-water mixture, and add the carbonic hydroammonium of flyash quality than 3% ~ 5%, in closed container, in 120 DEG C of boiling 2h, filter the filter cake that obtains in baking oven 150 DEG C dry to constant weight, flyash filter aid must be regenerated.
By fly ash in electric power plant (i.e. filter aid), regeneration flyash (namely regenerating filter aid), respectively take appropriate, join in the thick liquid of 1000ml Bayer and react 60 minutes, investigate its filter-aid performance and filtrate component, and control temperature 99.5 DEG C, stir 300r/m.Drainage effect is as following table 7:
Table 7
Known by table 7, after adding a little flyash filter aid powder, the thick liquid filtering velocity of Bayer significantly improves.The fine coal ashes drainage speed of regeneration is better, but compared with original production milk of lime, slightly slow.Known by table 8, add a certain amount of flyash solid and regeneration flyash solid, before and after drainage, the change of solution composition is little. compared with milk of lime drainage, and Al
2o
3, SiO
2concentration and α
khave no significant change:
Table 8
Example six
Produce the filter aid of the embodiment of the present invention for the thick liquid drainage of aluminium oxide Bayer process
Powdered coal ash, through 325 order vibratory sieve gradings, gets the semi-finished product that namely sieve upper part obtains being greater than 45 μm.The flyash semi-finished product being greater than 45 μm are mixed with the NaOH accounting for flyash quality 0.08%, namely obtains filter aid provided by the invention.
The regenerative process of filter aid: by used flyash filter aid, adopt renovation process provided by the invention, with water be made into solid containing for 60% coal-water mixture, and add the carbonic hydroammonium of flyash quality than 3% ~ 5%, in closed container, in 120 DEG C of boiling 2h, filter the filter cake that obtains in baking oven 150 DEG C dry to constant weight, flyash filter aid must be regenerated.
By fly ash in electric power plant (i.e. filter aid), regeneration flyash (namely regenerating filter aid), respectively take appropriate, join in the thick liquid of 1000ml Bayer and react 60 minutes, investigate its filter-aid performance and filtrate component, and control temperature 99.5 DEG C, stir 300r/m.Drainage effect is as following table 9:
Table 9
Known by table 9, after adding the NaOH of 0.08% in flyash, the thick liquid filtering velocity of Bayer significantly improves.The fine coal ashes drainage speed of regeneration is better, but compared with original production milk of lime, slightly slow.Known by table 10, the flyash solid that the NaOH adding flyash quality 0.08% is made and regeneration flyash solid, before and after drainage, the change of solution composition is little.Compared with milk of lime drainage, Al
2o
3, SiO
2
Concentration and α
khave no significant change:
Table 10
| Index batch | Na2OT | AL2O3 | Na2OC | SiO2 | αk | A/S |
| Thick liquid | 180.48 | 172.80 | 42.69 | 1.00 | 1.32 | 172.80 |
| Raw coal ash 0.6g | 179.48 | 172.80 | 39.86 | 1.05 | 1.33 | 165.0 |
| Raw coal ash 0.75g | 178.47 | 172.20 | 42.46 | 1.00 | 1.30 | 172.20 |
| Raw coal ash 0.9g | 177.42 | 172.20 | 37.27 | 1.05 | 1.34 | 164.0 |
| Raw coal ash 1.2g | 181.40 | 174.90 | 37.97 | 1.06 | 1.35 | 165.00 |
| Milk of lime | 178.92 | 175.20 | 43.16 | 1.04 | 1.32 | 168.5 |
| Regeneration coal ash 0.6g | 180.45 | 173.60 | 40.81 | 1.03 | 1.32 | 168.5 |
| Regeneration coal ash 0.75g | 179.82 | 172.90 | 41.48 | 1.02 | 1.34 | 169.5 |
| Regeneration coal ash 0.9g | 178.38 | 173.82 | 40.86 | 1.02 | 1.32 | 170.4 |
| Regeneration coal ash 1.2g | 180.58 | 174.93 | 39.89 | 1.02 | 1.30 | 171.5 |
Example seven
Flyash and raw slag, through 325 order vibratory sieve gradings, get flyash and slag semi-finished product that namely sieve upper part obtains being greater than 45 μm.The flyash being greater than more than 45 μm is mixed with 1:1.5 mass percent with slag, namely obtains filter aid provided by the invention.
The regenerative process of filter aid: by used flyash and slag filter aid, adopt renovation process provided by the invention, with water be made into solid containing for 60% coal-water mixture, and add the carbonic hydroammonium of flyash quality than 3% ~ 5%, in closed container, in 120 DEG C of boiling 2h, filter the filter cake that obtains in baking oven 150 DEG C dry to constant weight, flyash filter aid must be regenerated.
By fly ash in electric power plant and slag solid (i.e. filter aid), regeneration flyash and slag solid (namely regenerating filter aid), respectively take appropriate, join in the thick liquid of 3000ml Bayer and react 60 minutes, measure its floating material, control temperature 99.5 DEG C, stirs 300r/m.It is as shown in the table for result of the test shown in table 11:
Table 11
Through the test of tens groups, as can be seen from Table 11, the former powder of flyash, slag and regeneration powdered coal ash-cinder filter aid removal of impurities floating material respond well, after adding powdered coal ash-cinder filter aid, the floating material of seminal fluid can reach below 0.02g/L.
Example eight
Powdered coal ash, through 325 order vibratory sieve gradings, gets the semi-finished product that namely sieve upper part obtains being greater than 45 μm.By the semi-finished product being greater than 45 μm and mass percent concentration be 1% ammonium carbonate, ammonium bicarbonate aqueous solution mix, make solid containing for 60% coal ash pulp, in 120 DEG C of boiling 2h under air-proof condition, the filter cake after filtration is placed in 110 DEG C, baking oven and dries to constant weight, and obtains filter aid provided by the invention.
The regenerative process of filter aid: by used flyash filter aid, adopt renovation process provided by the invention, with water be made into solid containing for 60% coal-water mixture, and add the carbonic hydroammonium of flyash quality than 3% ~ 5%, in closed container, in 120 DEG C of boiling 2h, filter the filter cake that obtains in baking oven 150 DEG C dry to constant weight, flyash filter aid must be regenerated.
The fly ash in electric power plant being greater than 45 μm and lime are made certain density mixing and starch that (flyash mixes with milk of lime, i.e. filter aid; When lime and fine coal ashing are starched, lime-crushed stone pile is 0.35% of flyash weight), (regeneration flyash mixes with water regeneration flyash mixing slurry, namely filter aid is regenerated), respectively take appropriate, join in the thick liquid of 1000ml Bayer and react 60 minutes, investigate its filter-aid performance and filtrate component, control temperature 99.5 DEG C, stirs 300r/m.Drainage effect is as following table 12:
Table 12
| Project | Blank reference example | Reclaimed coal mortar | Reclaimed coal mortar | Milk of lime | The mixed slurry of raw coal stone | The mixed slurry of raw coal stone |
| Slurry dosage | 0 | 2ml | 2.5ml | 3.5ml | 2ml | 3.5ml |
| The drainage time | 15 points 3 seconds | 1 point 35 seconds | 1 point 34 seconds | 1 point 43 seconds | 1 point 49 seconds | 1 point 46 seconds |
As shown in Table 12, flyash allocates lime drainage into, and thick liquid filtration time is carbonate-free lime breast closely; Regeneration coal ash pulp drainage time average was than newborn fast 8 to 10 seconds of carbonate-free lime, even not bad than the newborn drainage effect of carbonate-free lime.Known by table 13, add a certain amount of former fly ash-lime mixing slurry and regeneration flyash mixing slurry, before and after drainage, the change of solution composition is little. compared with milk of lime drainage, and Al
2o
3, SiO
2concentration and α
khave no significant change, table 13 is as follows:
Table 13
| Index batch | Na 2O T | Al 2O 3 | Na 2O C | SiO 2 | α k | A/S |
| Thick liquid | 179.89 | 174.00 | 40.57 | 0.95 | 1.32 | 183 |
| Regeneration coal ash pulp 2ml | 180.40 | 172.05 | 43.40 | 0.96 | 1.33 | 179 |
| Reclaimed coal mortar 2.5ml | 180.39 | 171.70 | 41.04 | 0.95 | 1.34 | 180 |
| Milk of lime | 182.17 | 170.25 | 45.52 | 1.00 | 1.32 | 170 |
| Raw coal stone mixed slurry 2ml | 185.39 | 170.70 | 39.15 | 0.98 | 1.41 | 174 |
| Raw coal stone mixed slurry 2.5ml | 182.40 | 170.52 | 39.32 | 0.96 | 1.12 | 177 |
Example nine
Flyash and raw slag, through 325 order vibratory sieve gradings, get flyash and slag semi-finished product that namely sieve upper part obtains being greater than 45 μm respectively.The flyash being greater than 45 μm is mixed with 1:1.5 mass percent with slag, and add the carbonic hydroammonium of 1% and the ammonium carbonate of 1% of flyash and slag total weight of solids, allocate the lime accounting for flyash, slag, ammonium salt mixture gross weight 0.2% again into, mix and namely obtain filter aid provided by the invention.
The regenerative process of filter aid: by used flyash, slag, ammonium salt and lime mixing filter aid, adopt renovation process provided by the invention, with water be made into solid containing for 60% coal-water mixture, and add the carbonic hydroammonium of flyash quality than 3% ~ 5%, in closed container, in 120 DEG C of boiling 2h, filter the filter cake that obtains in baking oven 150 DEG C dry to constant weight, flyash filter aid must be regenerated.
By certain density fly ash in electric power plant, slag, ammonium salt and lime mixing slurry, regeneration coal ash pulp, respectively takes appropriate, joins in the thick liquid of 3000ml and react 60 minutes, measure its floating material, control temperature 99.5 DEG C, stir 300r/m.Result of the test is as shown in table 14:
Table 14
Through the test of tens groups, as can be seen from Table 14, flyash former powder lime mixing slurry and regeneration
Coal ash pulp removal of impurities floating material is respond well, and after both interpolations filter aid, the floating material of seminal fluid can reach below 0.02g/L.
Filter aid provided by the invention can be widely used in coloured, sugaring, beer, chemical industry and other industry, not only cheap, meets the wilderness demand of industrial filter, and achieves recirculation and reuse, and is a kind of filter aid of green.The research and development application of this filter aid achieves the value added applications of solid waste.
It should be noted last that, above detailed description of the invention only in order to technical scheme of the present invention and unrestricted to be described, although with reference to example to invention has been detailed description, the ordinary skill people of this area
Member should be appreciated that and can modify to technical scheme of the present invention or equivalent replacement, and does not depart from the spirit and scope of technical solution of the present invention, and it all should be encompassed in the middle of right of the present invention.
Claims (3)
1. a renovation process for filter aid, described filter aid comprises flyash or slag, and flyash described in pretreatment or slag, is characterized in that,
Described pretreatment comprises: described flyash or slag are carried out pickling or alkali cleaning, controls soda acid mass percent concentration 0.1% ~ 0.8% simultaneously; Or interpolation lime, control that described lime-crushed stone pile is described flyash or slag weight 0.1% ~ 0.5% simultaneously; Or add salt or alkali, the addition of described salt or alkali is 0.05 ~ 1% of described flyash or slag quality; Or interpolation salt, the addition of described salt is 1% ~ 10% of described flyash or slag quality, and will with the addition of the flyash of described salt or slag in 90 ~ 200 DEG C of boiling 1 ~ 5h under air-proof condition, wherein, described salt heating can produce gas;
Described renovation process comprises:
Used described filter aid is first washed, is the alkali cleaning of 0.4% with pickling, alkali mass percent concentration that sour mass percent concentration is 0.3% again, wash away be embedded between flyash not easily by the protein that water-washes away and yeast cells, more in an oven 200 DEG C of bake dryings to constant weight; Or
Used described filter aid is calcined 2-5h at 450 DEG C, and by ammonium carbonate solution 120 DEG C of boiling 2h of calcined material and mass percent concentration 5%, filter cake after filtering means dehydration is dried to constant weight at 110 DEG C; Or
Used described filter aid and water are made into solid containing for 60% coal-water mixture, and add the carbonic hydroammonium of flyash quality than 3% ~ 5%, in closed container, in 120 DEG C of boiling 2h, the filter cake that filtration obtains in baking oven 150 DEG C dry to constant weight; Or
Mix with used described filter aid 100g with the aqueous sodium hypochlorite solution 250ml of 1.2% and 0.6% concentration, 1.5h is stirred with agitator under room temperature, add the water soaking of one times of reactant volume again, leave standstill 1h hypsokinesis and remove clear liquid, filtration washing inclines the flyash after clear liquid at 200 DEG C of bake dryings to constant weight.
2. the renovation process of filter aid as claimed in claim 1, is characterized in that, if by the dry powder blend of described flyash and slag, the mixed proportion of the dry powder of described flyash and slag is 1:1 ~ 1:5.
3. the renovation process of filter aid as claimed in claim 1 or 2, it is characterized in that, described flyash or the percentage composition of slag in described filter aid are 90% to 99.9%.
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| US9896366B2 (en) * | 2014-02-26 | 2018-02-20 | Ecolab Usa Inc. | Alternative additives to enhance slurry dewatering |
| CN106315644A (en) * | 2015-07-03 | 2017-01-11 | 北京华索科技股份有限公司 | Method and system for acquiring refined fluid in alumina production process |
| CN106732486B (en) * | 2016-12-09 | 2019-08-02 | 广西珠江啤酒有限公司 | A kind of regenerative filter aid regeneration transfer method based on filter for beer |
| CN107793872A (en) * | 2017-11-14 | 2018-03-13 | 安徽省神洲建材科技有限公司 | A kind of Application way of flyash on exterior wall paint |
| CN107815168A (en) * | 2017-11-14 | 2018-03-20 | 安徽省神洲建材科技有限公司 | A kind of Application way of flyash on interior finish |
| CN109289321A (en) * | 2018-12-05 | 2019-02-01 | 大连海洋大学 | A novel biological filter material using waste shells as raw material and preparation method thereof |
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| CN1117887A (en) * | 1993-03-17 | 1996-03-06 | 易朝晖 | Method for regenerating filter aid |
| CN1611450A (en) * | 2003-10-31 | 2005-05-04 | 中国石油化工股份有限公司 | Waste water purifying agent, and its preparing method and use |
| CN102716616A (en) * | 2012-06-21 | 2012-10-10 | 中国铝业股份有限公司 | Filter aid used in leaf filtering process of sodium aluminate solution |
| CN102951666A (en) * | 2012-11-29 | 2013-03-06 | 中国铝业股份有限公司 | Crude-liquid filtering and refining method by Bayer process |
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| FR2733922B1 (en) * | 1995-05-12 | 1997-07-25 | Interbrew Sa | NOVEL FILTRATION ADJUVANTS, NOVEL FILTRATION MEDIA, FILTRATION METHOD USING THE SAME AND REGENERATION METHOD OF THE SAME |
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|---|---|---|---|---|
| CN1117887A (en) * | 1993-03-17 | 1996-03-06 | 易朝晖 | Method for regenerating filter aid |
| CN1611450A (en) * | 2003-10-31 | 2005-05-04 | 中国石油化工股份有限公司 | Waste water purifying agent, and its preparing method and use |
| CN102716616A (en) * | 2012-06-21 | 2012-10-10 | 中国铝业股份有限公司 | Filter aid used in leaf filtering process of sodium aluminate solution |
| CN102951666A (en) * | 2012-11-29 | 2013-03-06 | 中国铝业股份有限公司 | Crude-liquid filtering and refining method by Bayer process |
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