CN1199084A - Concentrated block and coal briquet producing process using papermaking black liquor as raw material - Google Patents
Concentrated block and coal briquet producing process using papermaking black liquor as raw material Download PDFInfo
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- CN1199084A CN1199084A CN97103283A CN97103283A CN1199084A CN 1199084 A CN1199084 A CN 1199084A CN 97103283 A CN97103283 A CN 97103283A CN 97103283 A CN97103283 A CN 97103283A CN 1199084 A CN1199084 A CN 1199084A
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- black liquor
- concentrated
- coal
- technology
- concentrated block
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
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Abstract
A method for making concentrated blocks or briquette with the black liquor from paper-making includes soaking, cooling, separating straw or wood pulp, concentrating, making blocks and making briquette, and features use of waste and reducing the discharged SO2 as the alkali in the briquette can react with sulfur in coal on burning, so protecting environment.
Description
The invention belongs to utilization of waste material or solid fuel field, particularly black liquid utilizes problem.
The black liquid that the paper mill produces is a kind of serious source of pollution, to the utilization and the processing aspect of black liquid, though device such as alkali recovery is arranged, expensive bigger, be difficult to implement in medium and small paper mill.The comparatively ideal processing and utilizing method of black liquid is not found so far as yet.
The objective of the invention is at existing weak point,, black liquid is utilized preferably by straw pulp in the papermaking operation or wood pulp are separated, concentrate and make concentrated block or moulded coal method to the black liquid treatment technology.
Technical scheme of the present invention is such.The method of making concentrated block and moulded coal with black liquid comprises that soaking cooling---separates and---concentrate---system concentrated block---production of shaped coal technology.Soaking temperature reduction technology is that straw pulp or wood pulp that rotary spherical digester is made are steeped, lower the temperature with an amount of water logging; Separating technology is that the slurries input after soaking is equipped with in the whizzer of 40-80 order nylon wire.Centrifugal under 400-600 rev/min rotating speed, make black liquor separate (or adopting filter separation method) with paper pulp; Concentration technology is that the black liquid that will separate is imported in the pond of metallic substance such as iron sheet, be connected with temperature under the iron sheet at the bottom of the pond and reach 80-90 ℃ hot-water line heating, hot-water line bottom and thermofin is arranged all around, heat is only conducted in the black liquor of iron sheet top, and hot-water line is connected with hot water boiler; The system concentrated block is that the black liquor after concentrating is continued evaporation concentration to doing, and makes bulk; Production of shaped coal technology is 20% concentrated block is added the coal dust of 70-75% and to allocate an amount of clay etc. into and make moulded coal in the moulded coal special machinery.Concentration technology also can adopt spontaneous evaporation to concentrate and adds flocculation agent and separates concentrated except that heating concentrates.It is that black liquid is imported in the cement pit that spontaneous evaporation concentrates, and makes concentrated block through spontaneous evaporation in 3-5 days; Adding the flocculation agent separation concentrated is flocculation agent to be added make its separation in the black liquor, and top contains buck reuse slurrying again, and the sedimentary organism in bottom carries out evaporation concentration again.
The present invention has following advantage:
1. the organism in the black liquor is made concentrated block and moulded coal after evaporation concentration, is used for industry or civilian, turns bane into boon social benefit and remarkable in economical benefits.
Alkali in the concentrated block when moulded coal burns can and coal in reaction of Salmon-Saxl, the sulfurous gas that discharges in air in the time of can reducing fire coal helps environment protection.
3. the water in the black liquor can directly be used as the water of production of shaped coal, has saved a large amount of waters and turns waste into wealth.
Embodiments of the invention are as follows:
The black liquid (straw pulp or wood pulp) that rotary spherical digester is made steeps with an amount of water logging, and the ratio of water and black liquid is about 1: 1, makes the black liquor cooling by adding water.Black liquor input after soaking is equipped with in the whizzer of 40-80 order nylon wire, and centrifugal under 400-600 rev/min of rotating speed (regulating rotating speed according to actual needs) makes black liquor separate with paper pulp, perhaps takes filtration to wait the separation method.Black liquor is separated from straw pulp or wood pulp.In the pond that metallic substance such as the black liquor separated input iron sheet are manufactured, the subcutaneous 80-90 of being connected with of pond floor iron ℃ hot-water line heats, hot-water line bottom and thermofin is arranged all around, and heat is only conducted in the black liquor above iron sheet, and hot-water line is connected with hot water boiler.Except that heating concentrates, also can adopt spontaneous evaporation to concentrate, black liquor is delivered in the big pond of antiseepage, allow the black liquor natural air drying by exposing to the weather, concentrate for the ease of consecutive evaporation, should be standby big pond more than two, to collect black liquid through separating treatment.After treating that black liquid in the pond is air-dry, in the pond, carry black liquid once more after taking out the concentrated block after air-dry.Also flocculation agent can be added and make its separation in the black liquor.When adopting treated starch to make flocculation agent, the ratio of flocculation agent and black liquor is 5-15%: 95-85%; If when making flocculation agent with unslaked lime, the ratio of itself and black liquor is 10-30%: 90-70%.That separates the upper back contains buck reuse slurrying again, and the sedimentary organism in bottom carries out evaporation concentration again.During production of shaped coal, 20% concentrated block added the coal dust of 70-75% and allocate an amount of clay (about 5-10%) etc. into and in the moulded coal special machinery, make moulded coal.Concentrated block also can be used as work in-process and directly burns with coal the production of shaped coal except that being used for.The producer that also can deliver to alkali recovery equipment carries out the alkali recycling.
Claims (2)
1. make the method for concentrated block and moulded coal with black liquid, it is characterized in that this method comprises soaks cooling---separate---concentrate---system concentrated block---production of shaped coal technology, soak temperature reduction technology and be straw pulp that rotary spherical digester is made or wood pulp with an amount of water logging bubble, lower the temperature; Separating technology is that the slurries input after soaking is equipped with in the whizzer of 40-80 order nylon wire, and is centrifugal under 400-600 rev/min rotating speed, makes black liquor separate (or adopting filter separation method) with paper pulp; Concentration technology is that the black liquid that will separate is imported in the pond of metallic substance such as iron sheet, the floor iron subcutaneous temperature that is connected with in pond reaches 80-90 ℃ hot-water line heating, hot-water line bottom and thermofin is arranged all around, heat is only conducted in the black liquor of iron sheet top, and hot-water line is connected with hot water boiler; The system concentrated block is that the black liquor after concentrating is continued evaporation concentration to doing, and makes bulk; Production of shaped coal technology is 20% concentrated block is added the coal dust of 70-75% and to allocate an amount of clay into and make moulded coal in the moulded coal special machinery.
2. the method for making concentrated block and moulded coal with black liquid according to claim 1, it is characterized in that concentration technology is except that heating concentrates, also can adopt spontaneous evaporation to concentrate and add flocculation agent and separates concentrated, it is that black liquid is imported in the cement pit that spontaneous evaporation concentrates, and makes concentrated block through spontaneous evaporation in 3-5 days; Adding the flocculation agent separation concentrated is flocculation agent to be added make its separation in the black liquor, and top contains buck reuse slurrying again, and the sedimentary organism in bottom carries out evaporation concentration again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97103283A CN1199084A (en) | 1997-05-09 | 1997-05-09 | Concentrated block and coal briquet producing process using papermaking black liquor as raw material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97103283A CN1199084A (en) | 1997-05-09 | 1997-05-09 | Concentrated block and coal briquet producing process using papermaking black liquor as raw material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1199084A true CN1199084A (en) | 1998-11-18 |
Family
ID=5166627
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97103283A Pending CN1199084A (en) | 1997-05-09 | 1997-05-09 | Concentrated block and coal briquet producing process using papermaking black liquor as raw material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1199084A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105331419A (en) * | 2015-12-07 | 2016-02-17 | 洛阳理工学院 | Method for preparing solid fuel by means of high-concentration organic waste liquid |
| CN108358367A (en) * | 2018-02-02 | 2018-08-03 | 广西金桂浆纸业有限公司 | A kind of processing method and processing system of black liquid |
-
1997
- 1997-05-09 CN CN97103283A patent/CN1199084A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105331419A (en) * | 2015-12-07 | 2016-02-17 | 洛阳理工学院 | Method for preparing solid fuel by means of high-concentration organic waste liquid |
| CN108358367A (en) * | 2018-02-02 | 2018-08-03 | 广西金桂浆纸业有限公司 | A kind of processing method and processing system of black liquid |
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| AD01 | Patent right deemed abandoned | ||
| C20 | Patent right or utility model deemed to be abandoned or is abandoned |