CN1050240A - Black liquid finishing agent and processing method - Google Patents
Black liquid finishing agent and processing method Download PDFInfo
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- CN1050240A CN1050240A CN 90107559 CN90107559A CN1050240A CN 1050240 A CN1050240 A CN 1050240A CN 90107559 CN90107559 CN 90107559 CN 90107559 A CN90107559 A CN 90107559A CN 1050240 A CN1050240 A CN 1050240A
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- finishing agent
- black liquid
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- black
- black liquor
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Abstract
A kind of black liquid finishing agent and use this finishing agent to administer the method for black liquor, this finishing agent is made up of hydrochloric acid aluminium oxide, ferrous oxide, calcium oxide, magnesia and refined fly ash, add 1～5% (weight ratio) this finishing agent natural subsidence several hours after stirring in the black liquid, the upper strata clear water is up to state standards, but reuse or discharging.Finishing agent of the present invention is easily made, and cost is low, and black liquor treatment process and equipment are simple, and capital cost and running cost are low, and saves the energy, economic benefit and social benefit height.
Description
The present invention relates to the processing method of a kind of black liquid finishing agent and black liquid.
Black liquid is a kind of organic pollution of severe contamination water quality, and the improvement of black liquid is one of the important topic that will study of current environment protection aspect.To the processing of black liquid, in prior art, there are flocculent precipitation, biochemical process, electroosmose process, burning to reclaim alkaline process etc.Adopt burning to reclaim alkaline process and handle black liquid, need equipment such as extraction, evaporation, burning, causticization.This method is used for middle-size and small-size paper mill, because the investment cost height, the equipment complex technology requires high, and black liquor can not provide continuously, can not normally move even built up.Some middle-size and small-size paper mill is raw material with the herbaceous plant, adopts alkaline process or sulfate pulping, contains the silica of a large amount in its black liquor, and it is rarer to extract black liquid consistency, can not reclaim alkaline process with burning and handle, and some other flocculant has little effect to black liquor.Therefore the black liquor in some small-sized paper mills can not get handling, and lets alone discharging and causes serious environmental to pollute.
The purpose of this invention is to provide a kind of black liquid finishing agent and use this processing to administer the method for black liquor, save the black liquid treatment process, reduce equipment investment, recycle water and reduce energy resource consumption.
First technical solution of the present invention is the black liquid finishing agent, this finishing agent is made up of hydrochloric acid, aluminium oxide, ferrous oxide, calcium oxide, magnesia and refined fly ash, the weight proportion of various compositions is 100 parts of hydrochloric acid, 10 parts in aluminium oxide, 5 parts of ferrous oxides, 10 parts in calcium oxide, 5 parts in magnesia, 30 parts of refined fly ashes.
Another technical solution of the present invention is to add the above-mentioned black liquid finishing agent of 1-5 ‰ (weight ratio) to stir 5～10 minutes in black liquid, and natural subsidence is 2～3 hours then, the recyclable utilization of upper strata clear water, and sediment can fully utilize.
This black liquid finishing agent is a two-phase, promptly contains polyionic liquid phase, contains the solid phase particle that makes the precipitation cohesion again.Residual NaOH, Na in hydrochloric acid when black liquor adds this finishing agent in the finishing agent and the black liquor
2CO
3, NaHCO
3Make the pH value of black liquor reduce to 6～7 by 10～14 Deng reaction, its reaction is as follows:
Above-mentioned reaction takes place in, the Al in the solution
+++, Cu
++, Fe
++, Mg
++Na
+The macromolecule organic of separating out in the solution is neutralized for the dipole negative electrical charge that has, make it no longer mutually exclusive and suspend, very fast cohesion around the flyash particulate forms bulky grain, just precipitate rapidly (precipitation just floats when flocculated particle is big), make the very fast decolouring clarification of black liquor.The present invention has the following advantages:
1, black liquor finishing agent of the present invention is easily made, and cost is low.
2, use this black liquor finishing agent processing black liquor operation and equipment simple, compare with burning Silvola recovery processing black liquor and can reduce capital cost and running cost greatly, and save the energy.
3, method black liquor treatment effect of the present invention is good, and water reclaims can reach 70～80% with rate.
4, method of the present invention is applicable to large-scale paper mill, also is applicable to middle-size and small-size paper mill, not only has an economic benefit but also has opened up a new approach for curbing environmental pollution.
Further specify technical scheme of the present invention in conjunction with the embodiments:
Embodiment 1
Get 10 liters of industrial hydrochloric acids and add 1 kilogram of aluminium oxide of adding and slowly stirring (40 rev/mins) when being heated to 50 ℃ in 15 liters of enamel reactors that have agitator, add 0.5 kilogram of ferrous oxide again, stirred 10 minutes after 1 kilogram of calcium oxide, 0.5 kilogram of magnesia, adding 3 kilograms of refined fly ashes (100～500 microns of granularities) again stirred 30 minutes under 50 ℃ of constant temperatures again, stopped 10 minutes, stir again after 30 minutes reactant with the acidproof strainer filtering of 200 orders, filtrate is this black liquid finishing agent, gets 9.5 liters of black liquid finishing agents.
Embodiment 2
Get paper mill, Harbin black liquor, PH=14, Be=2, aterrimus.
(1) getting black liquor adds in the graduated cylinder for 1000 milliliters.
(2) get in the finishing agent adding graduated cylinder of 2ml example 1, stirred slowly 5 minutes with stirring rod.
(3) observe the deposited phenomenon that bulk appears in black liquor in the graduated cylinder, begin cohesion after 15 minutes.Begin clarification after 30 minutes, sediment sinks to the graduated cylinder bottom, and has the part bulky grain to swim in top.Black liquor becomes the transparent liquid of little yellow by aterrimus, and pH value drops to 6 by 14.Filter with the felt for papermaking filter cloth, precipitation separation is 20% of a whole volume, and the water after the processing has reached national standard, its result such as following table.
Embodiment 3
Get paper mill, Tonghe County black liquor, PH=14, Be=1.5, aterrimus.
(1) getting black liquor adds in the groove for 500 liters.
(2) getting 1.5 liters of black liquid finishing agents adds in the grooves and stirred slowly 10 minutes with stirring rod.
(3) black liquor begins reaction in this time slot, just begins to occur coacervation after 4 minutes, begins precipitation after 30 minutes.Observe from groove top and to sink to bottom land, the clear solution in upper strata adopts the siphon way to separate after 2 hours, and the water after the separation is transparent, and the water after the processing has reached discharge standard, its result such as following table:
| Suspended matter (SS) mg/l | Five-day BOD (BOD 5) mg/l | PH value | |
| National standard | 340 | 600 | 6－9 |
| Embodiment 2 | 60 | 320 | 6 |
| Embodiment 3 | 50 | 310 | 6.5 |
Claims (2)
1, a kind of black liquid finishing agent is characterized in that by hydrochloric acid, aluminium oxide, ferrous oxide, and calcium oxide, magnesia and refined fly ash are formed, the weight proportion of various compositions is 100 parts of hydrochloric acid, 10 parts in aluminium oxide, 5 parts of ferrous oxides, 10 parts in calcium oxide, 5 parts in magnesia, 30 parts of refined fly ashes.
2, a kind of processing method of black liquid, the black liquid finishing agent that it is characterized in that adding 1～5 ‰ (weight ratio) claim 1 in black liquid stirs 5～10 minutes natural subsidence 2～3 hours then, but upper strata clear water reuse, sediment can fully utilize.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90107559 CN1050240A (en) | 1990-09-07 | 1990-09-07 | Black liquid finishing agent and processing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90107559 CN1050240A (en) | 1990-09-07 | 1990-09-07 | Black liquid finishing agent and processing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1050240A true CN1050240A (en) | 1991-03-27 |
Family
ID=4880611
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90107559 Pending CN1050240A (en) | 1990-09-07 | 1990-09-07 | Black liquid finishing agent and processing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1050240A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1054900C (en) * | 1995-09-28 | 2000-07-26 | 新疆工学院 | Method for modifying and dewatering alkali paper-making black liquor |
| CN100510247C (en) * | 2007-07-13 | 2009-07-08 | 五原县大民财纸业有限责任公司 | Black liquor recovery agent for pulp making process |
| CN102070309A (en) * | 2010-04-14 | 2011-05-25 | 南京理工大学 | Method for preparing hydraulic calcium oxide through papermaking alkali recycling causticized white sludge |
| CN103306154A (en) * | 2012-03-15 | 2013-09-18 | 秦才东 | Treatment and utilization method of pulping black liquor |
| CN104452396A (en) * | 2014-10-23 | 2015-03-25 | 上海交通大学 | Efficient black liquor treatment agent as well as preparation method and application of efficient black liquor treatment agent |
-
1990
- 1990-09-07 CN CN 90107559 patent/CN1050240A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1054900C (en) * | 1995-09-28 | 2000-07-26 | 新疆工学院 | Method for modifying and dewatering alkali paper-making black liquor |
| CN100510247C (en) * | 2007-07-13 | 2009-07-08 | 五原县大民财纸业有限责任公司 | Black liquor recovery agent for pulp making process |
| CN102070309A (en) * | 2010-04-14 | 2011-05-25 | 南京理工大学 | Method for preparing hydraulic calcium oxide through papermaking alkali recycling causticized white sludge |
| CN102070309B (en) * | 2010-04-14 | 2013-03-27 | 南京理工大学 | Method for preparing hydraulic calcium oxide through papermaking alkali recycling causticized white sludge |
| CN103306154A (en) * | 2012-03-15 | 2013-09-18 | 秦才东 | Treatment and utilization method of pulping black liquor |
| CN104452396A (en) * | 2014-10-23 | 2015-03-25 | 上海交通大学 | Efficient black liquor treatment agent as well as preparation method and application of efficient black liquor treatment agent |
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