CN1257140A - Solidifying treatment technology for black liquor in paper industry - Google Patents
Solidifying treatment technology for black liquor in paper industry Download PDFInfo
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- CN1257140A CN1257140A CN 98122091 CN98122091A CN1257140A CN 1257140 A CN1257140 A CN 1257140A CN 98122091 CN98122091 CN 98122091 CN 98122091 A CN98122091 A CN 98122091A CN 1257140 A CN1257140 A CN 1257140A
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- black liquor
- paper industry
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- solidifying treatment
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Abstract
The solidification treatment process for black liquor in paper-making industry is characterized by that the coagulant aid and gel forming agent is added in the black liquor with stirring, then the cross-linking agent and stirring is added to solidify the black liquor, and the added quantity of coagulant aid is 1%-5% of black liquor weight, the added quantity of gel forming agent is 0.001% to 0.02% of black liquor weight and the added quantity of cross-linking agent is 5-10% of black liquor weight. Said invention can convert the black liquor into solid state at normal temp. and normal pressure in short time and its investment is less, operation is simple, and its solidified material can be used for producing organic composite fertilizer, producing impure methane, making brick and used as fuel, etc.
Description
The present invention relates to the processing of black liquid, especially a kind of solidifying treatment technology for black liquor in paper industry.
Black liquid is the primary pollution source of paper industry, and its organic pollution accounts for more than 90% of papermaking enterprise wastewater organic pollutant total amount.Handle employing alkali reclaiming method at China's paper industry black liquor to large enterprise; It is big to adopt alkali to reclaim energy consumption to medium-sized and small enterprises, and the cost height is economical uneconomical, generally all adopts acidifying to reclaim lignin.Biodegradation, methods such as electrodialysis, but problems such as these methods all exist black liquor treatment not thorough, and secondary pollution is arranged, it is big to invest, complicated operation
Purpose of the present invention just provides that a kind of investment is little, simple to operate, black liquor is handled solidifying treatment technology for black liquor in paper industry completely.
Purpose of the present invention is realized by following technical scheme:
The solidifying treatment technology for black liquor in paper industry flow process is:
1, in black liquid, adds flocculation aid (in magnesia, sodium oxide molybdena, potassium oxide, the calcium oxide a kind of), gelling agent (in polyacrylamide, polyacrylic acid, Sodium Polyacrylate, polyacrylamide sodium, the polyacrylamide potassium a kind of), and stirred 10-30 minute, the weight of flocculation aid is the 1%-5% of black liquor gross weight, and the weight of gelling agent is ten thousand of black liquor gross weight/to 2/1000ths.The gelling agent using method is first water or black liquor dissolving, and concentration of ordinary dissolution is 1 ‰-2%, after the dissolving, is added in the black liquor again.2. crosslinking agent (in ferric sulfate, ferrous sulfate, ferric trichloride, bodied ferric sulfate, the frerrous chloride a kind of) is joined in the above-mentioned solution, the weight of crosslinking agent is the 5-10% of black liquor gross weight, stirs 5-20 minute, and black liquor promptly solidifies.
The solidfied material that above-mentioned technology produces can directly be used as compoiste fertilizer, produces biogas, brickmaking, make fuel, also can be used as the raw material of producing compoiste fertilizer and biological active organic fertilizer.
Solidifying treatment technology for black liquor in paper industry of the present invention is at normal temperatures and pressures, in black liquor, add flocculation aid, gelling agent, crosslinking agent in certain sequence, by stirring, it is solid-state that black liquor is changed into by liquid state at short notice, thereby realize black liquor (refer to extracted black liquor) zero-emission, thoroughly effect a radical cure the pollution of black liquid environment.Technology investment of the present invention is little, and is simple to operate, all effective to the black liquid of raw pulps such as wood, bamboo, careless class, and black liquid consistency is higher, solidification effect better, solidfied material can be used as compoiste fertilizer.Produce biogas, brickmaking, make fuel etc.
Below in conjunction with embodiment the present invention is elaborated.
Embodiment 1:
Adding calcium oxide 5kg and concentration are 2% polyacrylamide solution 10kg in the black liquid 100kg of 4.0 Baume degrees, and stirred 25 minutes, add 5 kilograms of polymeric ferrous sulphate solutions afterwards, stirred simultaneously 15 minutes, black liquor promptly solidifies, because black liquid consistency is low, and small-amount free water is arranged after the curing, solidfied material has flowability
Embodiment 2:
Adding magnesia 60kg and concentration are 1% polyacrylic acid solution 200kg in the black liquid 200kg of 6.5 Baume degrees, and stirred 15 minutes, add the 180kg liquor ferri trichloridi afterwards, stirred simultaneously 10 minutes, black liquid promptly solidifies, and no free water after stirring curing is after leaving standstill 12 hours, have low amounts of water to separate out, it is harder that solidfied material becomes.
Embodiment 3:
In the black liquid 100kg of 9.5 Baume degrees, add potassium oxide 3kg and concentration and be 1% sodium polyacrylate solution 1kg, and stir 10 minutes, add the 10kg ferrous sulfate afterwards, stirred simultaneously 5 minutes, black liquid promptly solidifies, solidify the no free water in back, hardness is good, and is mobile poor.
Claims (9)
1. solidifying treatment technology for black liquor in paper industry is characterized in that:
(1) in black liquid, adds flocculation aid, gelling agent, and stirred 10-30 minute;
(2) crosslinking agent is joined in the above-mentioned solution, stirred 5-30 minute, black liquor promptly solidifies.
2. solidifying treatment technology for black liquor in paper industry according to claim 1 is characterized in that: described flocculation aid is a kind of in calcium oxide, magnesia, sodium oxide molybdena, the potassium oxide.
3. solidifying treatment technology for black liquor in paper industry according to claim 1 and 2 is characterized in that: the addition of flocculation aid is the 1-5% of black liquid gross weight.
4. solidifying treatment technology for black liquor in paper industry according to claim 1 is characterized in that: described gelling agent is a kind of in polyacrylic acid, Sodium Polyacrylate, polyacrylamide, polyacrylic acid acyl sodium, the polyacrylic acid acyl potassium.
5, according to claim 1 or 4 described solidifying treatment technology for black liquor in paper industry, it is characterized in that: the gelling agent addition is ten thousand of a black liquid gross weight/to 2/1000ths.
6. solidifying treatment technology for black liquor in paper industry according to claim 1 is characterized in that: described crosslinking agent is a kind of in ferric sulfate, ferrous sulfate, ferric trichloride, bodied ferric sulfate, the frerrous chloride.
7. solidifying treatment technology for black liquor in paper industry according to claim 1 is characterized in that: the addition of crosslinking agent is the 5-10% of black liquid gross weight.
8. solidifying treatment technology for black liquor in paper industry according to claim 5 is characterized in that: gelling agent elder generation's water or black liquor dissolving, concentration of ordinary dissolution is 1 ‰-2%, adds in the black liquid afterwards
9. solidifying treatment technology for black liquor in paper industry according to claim 1 is characterized in that: the solidfied material after black liquid solidifies can directly be used as compoiste fertilizer.Produce biogas, brickmaking.Make fuel, also can be used as the raw material of producing compoiste fertilizer and biological active organic fertilizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98122091 CN1257140A (en) | 1998-12-11 | 1998-12-11 | Solidifying treatment technology for black liquor in paper industry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98122091 CN1257140A (en) | 1998-12-11 | 1998-12-11 | Solidifying treatment technology for black liquor in paper industry |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1257140A true CN1257140A (en) | 2000-06-21 |
Family
ID=5227572
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98122091 Pending CN1257140A (en) | 1998-12-11 | 1998-12-11 | Solidifying treatment technology for black liquor in paper industry |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1257140A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100439255C (en) * | 2006-08-23 | 2008-12-03 | 刘忠 | Process of extracting and utilizing solid matter of wheat straw pupl black liquid |
-
1998
- 1998-12-11 CN CN 98122091 patent/CN1257140A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100439255C (en) * | 2006-08-23 | 2008-12-03 | 刘忠 | Process of extracting and utilizing solid matter of wheat straw pupl black liquid |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |