CN103306154A - Treatment and utilization method of pulping black liquor - Google Patents
Treatment and utilization method of pulping black liquor Download PDFInfo
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- CN103306154A CN103306154A CN2013100695684A CN201310069568A CN103306154A CN 103306154 A CN103306154 A CN 103306154A CN 2013100695684 A CN2013100695684 A CN 2013100695684A CN 201310069568 A CN201310069568 A CN 201310069568A CN 103306154 A CN103306154 A CN 103306154A
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Abstract
The invention relates to a treatment and utilization method of pulping black liquor and particularly belongs to the field of alkaline pulping, extraction of cellulose and hemicellulose pulp and retting. The black liquor can form a large number of foams by utilizing a foam promoter when is inflated or vigorously stirred, and the foams are removed to remove organic substances which are dissolved or suspend in the black liquor, especially the organic substances with surface activity. Additionally, by utilizing the foaming property and the surface activity of the black liquor added with the foam promoter, the black liquor can be applied to the fields of foamed cement manufacturing, fire fighting, dust removal, flotation, oil exploitation and the like.
Description
Technical field
The present invention relates to a kind of processing of black liquor of pulp making and utilize method, especially soda pulping process and cellulose, hemicellulose pulp extract, the retting field, relate to and utilize foam booster to promote that black liquor forms foam when blasting gas, go out organic pollution and the various suspended matter that originally is dissolved in the black liquor by foamover, especially have surface-active organic matter, reach the purpose that reduces pollutant in the black liquor.
Background technology
The soda pulping process such as soda processes and sulfate process or make in the numb process, comprise chemical pulp, semi-chemical pulp or chemi-mechanical pulp, main chemical reaction is that lignin, the pectin in caustic soda and/or vulcanized sodium and the raw material, the reaction of various organic matter generate alkali lignin, pectic acid sodium, organic acid sodium and be dissolved in alkali lye.The waste liquid of boiling gained contains lignin and the catabolites such as cellulose, hemicellulose, tannin, pigment, pentose class, pectin substance, resin, fatty cured matter, silica, residual alkali and other leachable of different amounts according to the difference of pulping raw material, waste water Color expression brownish black, therefore waste water from cooking is called again black liquor, and the purpose that black liquor is processed namely is these materials in extraction and/or the decomposition black liquor.And the waste water of washing pulp, character is identical with black liquor, and just the content of pollutant is low than concentrated black liquid, in the technical scheme of the present invention, black liquor and washes is referred to as black liquor in the lump.Although art methods can flocculate the larger molecular organics matter in the black liquor by adding the flocculants such as PAC and PAM, be separated by filtration or air supporting after remove, but flocculating effect is relatively poor under alkali condition, and other residual organic substances that is dissolved in the black liquor still is difficult to obtain low-cost and effectively processing.
Summary of the invention
The processing of black liquor of pulp making of the present invention and utilize method, from emphasize that froth breaking is different in the existing black liquor sewage disposal technology, main technique methods of the present invention is, under the condition of not adding external foaming agent, the surface reactive material that the employing chemical method is converted into the organic pollution of dissolved state itself and has certain frothing capacity (estimates that dominant mechanism is for having formed lignin calcium, the macromolecule organic acid calcium salt of Calcium Pectate), then adopt the method that blasts bubble, in foaming and foam transfer, foam surface carries and migrates out the lignin that is dissolved in the sewage, pectic acid and various micelle and suspended particulate, reach the effect and the purpose that reduce organic matter and colloid in the sewage (inorganic colloid that comprises sodium metasilicate reaches the purpose of black liquor viscosity reduction simultaneously).
Different from the common waste water that contains organic pollution or the easy phenomenon of marginally bubbling of black liquor, when keeping liquid level and black liquor pool side edge to maintain an equal level, a large amount of foam that produces can cover continuously pool side, and can carry out a large amount of pollutants.Namely by promoting black liquor to form foam, go out to be dissolved in organic pollution in the black liquor by foamover, especially just carry out originally and have surface-active organic matter or after the effect of chemical addition agent, transform and have a surface-active organic matter, and carry out part and be solubilized into other the water-soluble organic matter that has in the described surface-active organic matter, foam itself can also carry out flocculated suspension thing in the black liquor by the air supporting effect simultaneously; Another object of the present invention is contact area and the chance that increases organic matter and air, promotes organic oxidation Decomposition; Also having a purpose is to utilize flyash and cement black liquor to be had the effect of certain promotion formation of foam, combination with the foam booster of the best, with black liquor modified for the foaming agent of foamed cement and utilize foam to have fire-fighting, flotation, dust removing effects, after black liquor added suitable chemicals, black liquor is applied to various needs as the foam foaming agent utilizes foam and surface-active industrial circle.
With the floccule body that utilizes in the air-dissolving air-float technology in the bubble absorption waste water, by bubble floating itself flco is carried into black liquor liquid table different, because molten gas bubble floating goes out easily fragmentation behind the liquid level, therefore, bubble is difficult to carry organic pollutants and moves at a distance.The processing of black liquor of pulp making of the present invention and to utilize method then be the material (foam booster that add to promote formation of foam in black liquor, directly make foam surface contain a large amount of organic surface-active substances) make black liquor when being filled with air, produce in a large number not breakable bubble foam, also be that the foam described in the present invention is for existing and have the chip-proof aeriferous foam of some strength the long period, so that the foam that the foam of follow-up generation can promote formerly to generate is grown the accumulation of distance, stack and mobile, thereby make the organic substance in the entrained a large amount of black liquor of foam surface break away from the black liquor surface and be moved out of black liquor, reach and remove or partly remove the purpose that is dissolved in the organic substance in the black liquor, the salt (lignin calcium and lignin sodium) that comprises lignin, pectic substance, etc.Simultaneously, employed foam booster also has the larger molecular organics that makes in the black liquor, form precipitable or be suspended in the black liquor corresponding salts substances such as components such as lignin, pectin class, silicate colloids, and with foam or by filtering these precipitations of removal or suspended matter, reach the purpose that part reduces pollutant in the black liquor, and reach neutralize pH value, silica removal, the grease removal that reduces black liquor, the beneficial effect that removes soap, viscosity reduction.The another one advantage that organic matter in the black liquor is carried on the surface of foam is, foam has increased the touch opportunity of organic matter in the black liquor and air and effective contact area, promotes the oxidation Decomposition of organic pollution.
The processing of black liquor of pulp making of the present invention and utilize method includes but not limited to following steps:
Steps A, add the foam booster that promotes black liquor to form foam in the black liquor, obtain mixing black liquor, and preferably stir;
Be filled with air in step B, the mixing black liquor in the steps A or carry out mechanical agitation and carry air and enter black liquor, black liquor is become contain the mixing black liquor of foam booster, form foam on the black liquor surface simultaneously, formed foam drift is left or is scanned out the black liquor liquid level with mechanical system.Steps A, B also can carry out simultaneously synchronously.
According to the effect of economy and formation of foam, better foam booster is calcium chloride or magnesium chloride, under the equal conditions, can make black liquor produce a large amount of foams; Best, foam booster is the composition of calcium chloride or magnesium chloride and/or lime and/or calcium sulfate (comprising desulfurated plaster) and/or cement and/or flyash, at this moment, not only can produce a large amount of foams, and it is more tiny and stable that foam becomes.
The processing of black liquor of pulp making of the present invention and utilize method, in order to utilize cheap trade waste desulfurated plaster, overcome the low defective of calcium sulfate solubility, the material that is referred to as calcium sulfate with uniting among desulfurated plaster or the present invention and muriatic mixture are as the flocculating settling agent of the alkali lignin in the black liquor and/or pectin and/or silicate, black liquor thinner or neutralizer or as the foam booster of black liquor, utilize the dissolving of the chlorion promotion calcium sulfate of separating out in the chloride, optional chloride such as sodium chloride and/or aluminium polychloride and/or hypochlorite bleaching and/or hydrochloric acid.
The neutralisation treatment method of black liquor of pulp making of the present invention, utilization adds the method for calcium chloride, magnesium chloride, calcium sulfate and/or magnesium sulfate in black liquor, make the high basic organic acid sodium salt of solubility be converted into the low calcium of organic acid of solubility or organic acid magnesium salts and neutral sodium sulphate, reach the purpose that neutralization reduces the alkalescence of black liquor, and be conducive to utilize flocculant, make the organic matter flocculation sediment in the black liquor.
In order to promote black liquor to form foam, especially with black liquor during as the foaming agent of foamed cement, can also in black liquor, add other surfactant, in order to optimize the foam facilitation effect, perhaps make only replenishing as conventional cement foamable composition of black liquor, wherein, described foam booster is anion and/or CATION and/or amphion and/or neutral ion organic surface active agent class material.
Consider that general black liquor moisture is high, for fear of concentrated black liquor, directly black liquor of pulp making is mixed with dried cement powders, make moisture in the black liquor as the needed moisture of hydrated cementitious pulping, therefore, the method includes but not limited to following steps:
Steps A, add calcium chloride or magnesium chloride or calcium sulfate or magnesium sulfate or their mixture in the black liquor, mix the mixing black liquor that obtains having good foam performance;
Add cement powders and/or flyash and/or quick lime and/or gypsum and/or ardealite and/or the sandstone material of doing in step B, the mixed solution in the steps A, be filled with simultaneously air and carry out strong agitation, cement slurry is mixed into contains alveolate cement concrete.
The production method of above-mentioned foamed cement can also be reduced to following steps:
Steps A, add calcium chloride or magnesium chloride or calcium sulfate or magnesium sulfate or their mixture in the black liquor, obtain mixing black liquor;
Step B, use foaming machine that mixing black liquor in the steps A is formed into to be foam;
Step C, the foam that forms among the step B and cement slurry be mixed into contain alveolate cement admixture.
Because alkaline process retting process processed is similar to the black liquor waste that the soda pulping process paper-making process produces, therefore, above-mentioned technology can be applied in the black liquor waste processing of retting processed equally.
The specific embodiment
Embodiment 1:
The result of aeration experiment is following under the normal temperature and pressure (uses the small-sized aerator aeration, the container of splendid attire black liquor is 200 milliliters opening beaker, during aeration, until till when not having new foam to produce, in order to compare, used black liquor is 150 milliliters of the black liquor (as a unit volume) of discharging in the same batch of Wheat Straw Alkaline pulping and digesting pot, the amount of the chemicals that adds is the 0.5-5% of black liquor weight, optimised quantity should be the calcium ion that adds or magnesium ion quantity greater than can be fully and all kinds of organic and inorganic acid sodium of lignin sodium or other in sodium ion carry out the amount of alternative reaction.)：
When in black liquor, not adding any chemicals, produce the approximately foam volume of half volume;
The simple sodium chloride that adds increases some foam volumes (approximately 1/3rd volumes) a little in black liquor;
Simple magnesium chloride or the magnesium sulfate of adding produces a large amount of foam volume (the approximately volume of 3 times of black liquor) in black liquor;
Simple lime (calcium oxide) or the white lime (calcium hydroxide) of adding in black liquor, produce a large amount of foam volume (the approximately volume of 3 times of black liquor), because both chemical results are identical, be convenient statement, among the present invention, quick lime and white lime are referred to as lime in the lump;
The simple calcium chloride that adds produces a large amount of foam volume (the approximately volume of black liquor more than 5 times) in black liquor;
The simple calcium sulfate (or power plant desulfurization gypsum) that adds in black liquor produces a large amount of foam volume (the approximately volume of 4-5 times of above black liquor);
In black liquor, add calcium sulfate, after producing a large amount of foam removals, the salt that adds again 1% black liquor weight, find to produce again the approximately foam of black liquor volume more than 2 times, illustrate salt promoted organic matter in calcium sulfate and the black liquor (as lignin sodium, pectic acid sodium, sodium saccharate, sodium metasilicate, etc. various acylates and inorganic acid salt) reaction, especially with the reaction of lignin sodium, therefore, sodium chloride has the effect that promotes that calcium sulfate bubbles; May be the salt effect of sodium chloride, promote the dissolving of calcium sulfate.
Lignin sodium in calcium (magnesium) ion and black liquor reacts as example, and its ionic reaction formula is Ca
++(Mg
++)+2Na-L=Ca-L2 (Mg-L2)+2Na
+, the lignin sodium of black liquor neutral and alkali changes the weak lignin calcium (magnesium) of alkalescence into, and the pH value of black liquor is neutral from the alkalescence trend.Actual measurement shows, the pH value of black liquor is reduced to 8-9 from 10-12, make originally the waste water of alkalescence obtain neutralizing and the advantage of neutralisation is, even bubble in the situation that do not use inflation, add traditional flocculant such as aluminium polychloride, polyacrylamide and can more effectively flocculate and remove organic matter in the waste water, because traditional flocculant is difficult to effectively bring into play flocculation under alkali condition.And traditional with in sulfuric acid or the hydrochloric acid acid and the method for black liquor, financial cost is high, is difficult to obtain actual application.
Constantly to the top accumulation of beaker, highly surpass the height of beaker during above-mentioned formation of foam, illustrate that formed foam has certain mechanical strength; The half-life of formed foam (being the time of the lather collapse of half volume) is generally greater than 1 minute, and is average more than 5 minutes, illustrated that formed foam has good stability, has reached adaptable degree.Its essence may be because lignin calcium and/or Calcium Pectate have hydrophilic and the surface-active property oleophylic amphiphilic, under inflation or simple agitation condition, can produce a large amount of foams.And the foamy body that adds behind calcium salt or the magnesium salts is large, stop the bubbling aeration after, still can keep the accumulation form of foam, only have the air dry through the long period just to form Powdered.
After above-mentioned aeration process carries out and finishes, through leaving standstill, obtaining the upper strata is that yellowish red color is to the transparent solution of brownish red, lower floor is tan sediment, transparency liquid to pH value through the sulfuric acid acidation upper strata is 2 o'clock, liquid is still transparent, lignin in the black liquor is described, pectin, silicate, various suspended matters (hemicellulose or cellulose family) etc. are all removed effectively, actual measurement CODcr is reduced to 1000-1100mg/L from initial 3000-5000mg/L and (is mainly the carbohydrate that is dissolved in water, acylate and pigment), thus suitable condition provided for follow-up biochemical treatment or reuse.Wherein, the removal of silicate (such as sodium metasilicate) realizes easily by forming calcium silicates or magnesium silicate precipitation.
Forming foam is because the hydrocarbon oxygen organic compound in the black liquor has surface-activity, or after adding suitable salt, formed acylate has stronger surface-activity, thus a large amount of generations of foam when having promoted aeration.Can draw from above-mentioned experimental result, the reason that forms foam might mainly be because lignin calcium (magnesium) has the surface-activity of amphiphilic, or lignin calcium (magnesium) and other calcium of organic acid (magnesium) salt have than lignin sodium, surface-activity that organic acid sodium is stronger; Wherein, calcium salt may have higher surface-activity than magnesium salts.
Use the washing Heisui River of washing pulp instead, above-mentioned experimentation has similar result, therefore repeat no more.
Above-mentioned experimental result shows, calcium alkali or calcium salt, and such as calcium oxide, calcium hydroxide, calcium chloride, calcium sulfate (comprising various gypsum, power plant desulfurization gypsum); Magnesium salts, such as magnesium chloride, magnesium sulfate all has promotion or makes the organic matter in the black liquor become the material that can form in a large number foam.Because desulfurated plaster belongs to twice laid, price is low, in field of waste water treatment, having more commercial exploitation is worth, but, the solubility of gypsum (calcium sulfate) in water is low, with alkali lignin (lignin sodium) sluggish, find in the experiment, after the power plant desulfurization gypsum powder of adding capacity or sulfuric acid calcium powder also fully stir and leave standstill, dense black liquor and land plaster or sulfuric acid calcium powder form the sepia colloid, be sprinkled into the salt powder this moment, namely visible colloid layering illustrates the existence of sodium chloride, catalysed promoted the dissolving of calcium sulfate, the lignin calcium or the Calcium Pectate that make fully water-soluble lignin sodium or pectic acid sodium be converted into more low solubility.Sodium chloride is than calcium chloride, magnesium chloride, and aluminium chloride (or aluminium polychloride) is inexpensive, therefore, is the preferred of commercial Application, and namely the Combination application of calcium sulfate and sodium chloride has advantages of least cost.Therefore, in black liquor, add in the step of calcium sulfate, add simultaneously sodium chloride as the dissolution accelerator of calcium sulfate, can bring into play to a greater degree the chemical action as the desulfurated plaster of discarded object, similarly, when in black liquor, adding calcium sulfate as the precipitating agent of the silicate silica removal in the black liquor, add simultaneously the effect that sodium chloride has same dissolving facilitation to calcium sulfate and promotes precipitation reaction.
Above-mentioned sodium chloride can substitute or mixes use with calcium sulfate simultaneously with other chloride, such as aluminium polychloride and/or hypochlorite bleaching and/or hydrochloric acid.After the pH value of calcium sulfate and black liquor reaction neutralization reduction black liquor, make aluminium polychloride can bring into play better flocculation, simultaneously the chlorion that discharges of aluminium polychloride or chlorate or hypochlorite bleaching (especially can be salvaged contained chlorion in the useless plain boiled water that association with pulp bleaching produces) can promote again the dissolving of calcium sulfate conversely.
For foam is shifted out the black liquor pond as soon as possible, container or the pond of splendid attire black liquor are full of black liquor all the time, and continue to pass into circularly a small amount of treated exhausted water stream, by overflowing of black liquor, entrained foam leaves the black liquor pond rapidly, enters foam and collects and treatment region.Because foam nature froth breaking and the extraction product after nature or artificial drying mainly are the solid matters such as lignin calcium (magnesium) and/or Calcium Pectate (magnesium), therefore, the organic fertilizer that can be used as fuel or calcic or contain magnesium of the extract in the black liquor waste uses.
In order to confirm that the material that traditional aluminium polychloride or polyacrylamide flocculant flocculate does not have the performance of foaming, experimental result shows, heavy sediment or flocculate (being formed by polymeric aluminum or polyacrylamide) do not have the characteristic that promotes into foam, so, after foam a small amount of in the black liquor is removed (these foams may be owing to the already present surface reactive material of industry in the black liquor is facilitated), although still contain flocculate in the black liquor, can not generate new foam.
Embodiment 2:
At normal temperatures and pressures, in the black liquor pond, fill with from 40 tons of the wingceltis bark black liquor of pulp making (mixed liquor that comprises part black digestion liquid and pulp washing black liquor, the CODcr concentration value is about about 5000mg/L) (effect of other raw material such as stalk or trees alkaline pulping black liquor is similar for example, therefore omit), utilizing and per hour demarcating air inflow is that 50 cubic metres aerator (or replace with emulsifying mixer) was inflated 1-3 hour, in the situation that do not add foam booster, the black liquor surface only forms thick approximately 5 centimetres white foam, (the calcium chloride weight content is about 0.01% in the black liquor when 4 kilograms of calcium chloride powders of adding are last, on pulping and paper-making actual production line, bleaching effluent can also be mixed with black liquor, to utilize the calcium chloride in the bleaching water), aeration after 3 hours at about 1.5 meters the white foam layer of black liquor surface height of formation.Under aforementioned same aeration condition, to use white lime instead and substitute the calcium chloride powder, the black liquor surface only forms high approximately 1 meter white foam; If use power plant's land plaster instead, the black liquor surface only forms high approximately 0.5 meter white foam, but after adding 4 kilograms of Nacls (sodium chloride), foam height reaches more than 1 meter again; If use Portland cement dry powder or fly ash in electric power plant instead, the black liquor surface also only forms high approximately 0.5 meter white foam; If but in the black liquor that has added the calcium chloride powder, add again lime, calcium sulfate, cement and/or flyash, then formed foam becomes fine and smooth, especially when having added flyash, formed foam is finer and smoother and closely knit, and the formed foam color of aeration is dark brown after adding flyash, and merely with flyash and foams mix, the color of foam has just been caught the color of flyash, illustrate that the mineral matter in the flyash has played the effect of cheap catalyst, promoted the catalytic oxidation of organic matter and air in the black liquor, this perhaps is because contained certain or certain several chemical composition have the effect of the moulding of the wet oxidation of catalyzing organic and foam in the flyash.
The foam that produces in above-mentioned each process, white foam begins to occur the organic oxidation product of brown after 3 hours, through approximately 10 hours, the superiors be exposed to airborne foam all oxidized and air dry become the brown flour.Illustrated and be attached to the easy oxidation by air of organic matter that foam surface contacts with air.In black liquor, add the compound that contains iron ion, will have the effect of catalytic oxidation, and add titanium oxide attritive powder material, will promote the organic matter of photochemical catalytic oxidation foam surface.
When employed foam booster have the macromolecular pectin class that makes in the black liquor, when lignin, silicate component that molecular weight is large form precipitable salts substances in black liquor, to make pectin class, lignin, silicate colloid material as much as possible flocculation sediment separate out, by filtering or precipitation is extracted and removed these sediments, reach the purpose that part reduces pollutant in the black liquor and desiliconization, viscosity reduction.
The foam that overflows from the black liquor top has carried moisture simultaneously, be back to after moisture is secreted in the raw black liquid, the foamed that circulates is processed, until no longer produce in the black liquor or when producing foam in a large number till, remove to greatest extent the organic matter in the black liquor, especially have surface-active organic matter.Leave the black liquor liquid level for making things convenient for foam to drift about to overflow, preferably make the Chi Kou in black liquor pond be higher than territory, base area, pond, make the foam Automatic continuous constantly flow into territory, base area, pond or scan out liquid level with mechanical system.In order to promote further the formation of foam in the black liquor, especially with black liquor as the foaming agent of following production foamed cement, be applied to the foaming agent in the fields such as fire-fighting, dedusting, flotation, can also in black liquor, add conventional surfactant, such as anion and/or CATION and/or amphion and/or neutral ion organic surface active agent class material, such as sodium alkyl benzene sulfonate etc.
Embodiment 3:
The black liquor of pulp making that calcium chloride, magnesium chloride, calcium sulfate, magnesium sulfate and/or lime have been added in utilization can produce the characteristics of a large amount of bubbles, perhaps add further the conventional blowing agent of foamed cement, make the black liquor of pulp making resource for producing the blowing agent of foamed cement.Consider that general black liquor moisture is high, the active surface active matter quality is few, for fear of concentrated black liquor, directly black liquor of pulp making is mixed with the cement powders of doing, make moisture in the black liquor as the needed moisture of hydrated cementitious pulping, namely in mixed solution, add cement powders and/or flyash and/or lime and/or gypsum and/or ardealite and/or the sandstone material of doing, be filled with simultaneously air and carry out strong agitation, cement slurry is mixed into contains alveolate cement concrete.The production of above-mentioned foamed cement can also be reduced to following steps: steps A, add calcium chloride, calcium sulfate, magnesium chloride, magnesium sulfate and/or lime or add simultaneously other foaming agent in black liquor, obtain mixing black liquor; Step B, use foaming machine or sprayer that mixing black liquor in the steps A is formed into to be foam; Step C, the foam that forms among the step B and cement slurry be mixed into contain alveolate cement admixture; Perhaps step C is, the foam that obtains among the step B is separated with oozy solution below the foam, obtains the black liquor that is rich in the foam of organic pollution and has reduced organic pollution.
Above-mentioned use foaming machine or through sprayer mixing black liquor in the steps A be formed into be foam, can directly apply to fire-fighting domain, perhaps need the dedusting field (such as ore, the broken occasion of building stones), perhaps utilize and mix the surface-activity that black liquor has, to mix black liquor as ore floatation agent, the oil exploitation used additives, emulsifying agent (as being used for asphalt emulsification), be about to be mixed with calcium chloride, calcium sulfate, magnesium chloride, magnesium sulfate, and/or lime or be mixed with simultaneously the black liquor of other foaming agent, as fire-fighting, dedusting is with foaming agent or as flotation, the oil recovery used additives, emulsifying agent.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, have in the technical field under any and usually know the knowledgeable, if in the scope that does not break away from technical characterictic that the present invention carries, utilize disclosed technology contents to make the local equivalent embodiment that changes or modify, and do not break away from technical characterictic content of the present invention, all still belong in the scope of the technology of the present invention feature.
Claims (12)
1. the processing method of a black liquor of pulp making, wherein, the method includes but not limited to following steps:
Steps A, add the foam booster that promotes black liquor to form foam in the black liquor, obtain mixing black liquor, and preferably stir;
Be filled with air in step B, the mixing black liquor in the steps A or carry out mechanical agitation and carry air and enter black liquor, black liquor is become contain the mixing black liquor of foam booster, form foam on the black liquor surface simultaneously, formed foam drift is left or is scanned out the black liquor liquid level with mechanical system.
2. the processing method of a black liquor of pulp making, wherein, the method includes but not limited to following steps:
Steps A, add the foam booster that promotes black liquor to form foam in the black liquor, obtain mixing black liquor, and preferably stir;
Step B, use foaming machine or sprayer are with the mixed black liquid foamed in the steps A;
Step C, the foam that obtains among the step B is separated with oozy solution below the foam.
3. such as the processing method of claim 1 and 2 described black liquor of pulp making, wherein, described foam booster is calcium chloride, calcium sulfate, magnesium chloride, magnesium sulfate and/or lime and/or cement and/or flyash or is their composition.
4. such as the processing method of claim 1 and 2 described black liquor of pulp making, wherein, described foam booster is anion and/or CATION and/or amphion and/or neutral ion organic surface active agent class material.
5. the processing method of a black liquor of pulp making, wherein, with calcium sulfate and muriatic mixture as flocculating settling agent, thinner and/or the neutralizer of black liquor and/or as the foam booster of black liquor.
6. the processing method of black liquor of pulp making as claimed in claim 5, wherein, described chloride is sodium chloride and/or aluminium polychloride and/or hypochlorite bleaching and/or hydrochloric acid.
7. the neutralisation treatment method of a black liquor of pulp making wherein, adds calcium chloride, magnesium chloride, calcium sulfate and/or magnesium sulfate in black liquor.
8. the processing method of a black liquor of pulp making, wherein, the method includes but not limited to following steps:
Steps A, the black liquor in the black liquor pond add claim 5 or the 6 described neutralizers that make the black liquor neutralization;
Add flocculant in step B, the mixing black liquor in the steps A, make the organic matter flocculation sediment in the black liquor.
9. the processing method of a black liquor of pulp making wherein, adds aeration behind the flyash in black liquor, realize organic wet oxidation in the black liquor.
A black liquor of pulp making utilize method, wherein, the method includes but not limited to following steps:
Steps A, in black liquor, add calcium chloride, calcium sulfate, magnesium chloride and/or magnesium sulfate, obtain mixing black liquor;
Add cement powders and/or flyash and/or lime and/or gypsum and/or ardealite and/or the sandstone material of doing in step B, the mixed solution in the steps A, be filled with simultaneously air and carry out strong agitation, cement slurry is mixed into contains alveolate cement concrete.
11. a black liquor of pulp making utilize method, wherein, the method includes but not limited to following steps:
Steps A, in black liquor, add calcium chloride, calcium sulfate, magnesium chloride, magnesium sulfate and/or lime or add simultaneously other foaming agent, obtain mixing black liquor;
Step B, use foaming machine that mixing black liquor in the steps A is formed into to be foam;
Step C, the foam that forms among the step B and cement slurry be mixed into contain alveolate cement admixture.
12. a black liquor of pulp making utilize method, wherein, to be mixed with calcium chloride, calcium sulfate, magnesium chloride, magnesium sulfate and/or lime or be mixed with simultaneously the black liquor of other foam booster, as fire-fighting, dedusting with foaming agent or as flotation, oil recovery used additives or as emulsifying agent.
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| CN105502799A (en) * | 2014-10-20 | 2016-04-20 | 郭其哲 | Liquid-foam separator of circulating water system |
| CN106311073A (en) * | 2016-08-12 | 2017-01-11 | 马鞍山十七冶工程科技有限责任公司 | Straw-fiber-paper-pulp-waste-liquid surfactant and preparing method thereof |
| CN115667622A (en) * | 2020-05-22 | 2023-01-31 | 苏扎诺公司 | Method of treating kraft process recovery cycle to reduce metal levels in kraft process |
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| CN115667622A (en) * | 2020-05-22 | 2023-01-31 | 苏扎诺公司 | Method of treating kraft process recovery cycle to reduce metal levels in kraft process |
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