CN116289286A - Method for producing cellulose from agricultural straw - Google Patents
Method for producing cellulose from agricultural straw Download PDFInfo
- Publication number
- CN116289286A CN116289286A CN202310293751.6A CN202310293751A CN116289286A CN 116289286 A CN116289286 A CN 116289286A CN 202310293751 A CN202310293751 A CN 202310293751A CN 116289286 A CN116289286 A CN 116289286A
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- Prior art keywords
- forage
- extruded
- liquid
- pool
- solid content
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- 239000010902 straw Substances 0.000 title claims abstract description 27
- 239000001913 cellulose Substances 0.000 title claims abstract description 18
- 229920002678 cellulose Polymers 0.000 title claims abstract description 18
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 239000004459 forage Substances 0.000 claims abstract description 52
- 239000007788 liquid Substances 0.000 claims abstract description 40
- 239000007787 solid Substances 0.000 claims abstract description 34
- 230000018044 dehydration Effects 0.000 claims abstract description 31
- 238000006297 dehydration reaction Methods 0.000 claims abstract description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000000463 material Substances 0.000 claims abstract description 27
- 238000000855 fermentation Methods 0.000 claims abstract description 9
- 230000004151 fermentation Effects 0.000 claims abstract description 9
- 239000002002 slurry Substances 0.000 claims abstract description 9
- 238000002791 soaking Methods 0.000 claims abstract description 9
- 238000000227 grinding Methods 0.000 claims abstract description 8
- 239000003337 fertilizer Substances 0.000 claims abstract description 6
- QJZYHAIUNVAGQP-UHFFFAOYSA-N 3-nitrobicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid Chemical compound C1C2C=CC1C(C(=O)O)C2(C(O)=O)[N+]([O-])=O QJZYHAIUNVAGQP-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000004021 humic acid Substances 0.000 claims abstract description 5
- 238000003756 stirring Methods 0.000 claims abstract description 5
- 208000005156 Dehydration Diseases 0.000 claims description 30
- 238000001125 extrusion Methods 0.000 claims description 12
- 238000004140 cleaning Methods 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 4
- 239000000126 substance Substances 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 238000001914 filtration Methods 0.000 abstract 1
- 238000005406 washing Methods 0.000 description 5
- 244000025254 Cannabis sativa Species 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000012620 biological material Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 description 1
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 description 1
- 241001349804 Juncus alpinoarticulatus Species 0.000 description 1
- 235000014676 Phragmites communis Nutrition 0.000 description 1
- 244000082204 Phyllostachys viridis Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000002154 agricultural waste Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 235000009120 camo Nutrition 0.000 description 1
- 235000005607 chanvre indien Nutrition 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 239000011487 hemp Substances 0.000 description 1
- 238000010297 mechanical methods and process Methods 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials
-
- 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
- Y02E50/10—Biofuels, e.g. bio-diesel
Landscapes
- Fertilizers (AREA)
- Processing Of Solid Wastes (AREA)
- Fodder In General (AREA)
Abstract
The invention discloses a method for producing cellulose from agricultural straws, which comprises the following steps: 1) Crushing straw forage subjected to fermentation treatment, then entering a first material pool, adding liquid extruded by a second dehydrator, stirring, entering a first dehydrator, and entering a second material pool from the forage extruded by the first dehydrator, wherein the extruded liquid is humic acid water and fertilizer, and the solid content is 10-30%; (2) The forage enters a second material pool, liquid obtained by three times of dehydration and filtration is added into the second material pool, stirred and then conveyed into a secondary dehydrator, and the extruded water enters a first material pool; the extruded forage enters a slurry pool, the solid content is 35-45%, and the concentration of the extruded liquid is 3-8%; (3) And sequentially carrying out first grinding machine, third dewatering, soaking in a pulp soaking pool, second grinding machine and fourth dewatering treatment on the forage treated by the pulp pool to obtain a cellulose product. The invention has no emission of harmful substances, excellent environmental protection performance, convenient operation and high efficiency.
Description
Technical Field
The invention relates to a method for producing cellulose from agricultural straws.
Background
As an agricultural waste, the straw is generally treated by adopting methods such as incineration and the like, so that resources are wasted and the environment is polluted; the existing straw decomposition method adopts an alkali or acid chemical method, and also adopts a chemical-mechanical method combining chemistry and machinery or a chemical-physical method, and the treatment methods have sewage, discharge and are harmful to the environment.
Disclosure of Invention
The invention aims to provide a method for producing cellulose from agricultural straws, which is simple and efficient.
The technical scheme of the invention is as follows:
a method for producing cellulose from agricultural straw, which is characterized by comprising the following steps: comprises the following steps:
(1) Crushing straw forage subjected to fermentation treatment, then entering a first material pool, adding liquid extruded by a second dehydrator, stirring, entering a first dehydrator, and entering a second material pool from the forage extruded by the first dehydrator, wherein the extruded liquid is humic acid water and fertilizer, and the solid content is 10-30%;
(2) The forage enters a second material pool, liquid filtered by three times of dehydration (pressure screen) is added into the second material pool, stirred and then conveyed into a secondary dehydrator, and the extruded water enters a first material pool; the extruded forage enters a slurry pool, the solid content is 35-45%, and the concentration of the extruded liquid is 3-8%;
(3) Sequentially carrying out first grinding machine, third dewatering, soaking in a pulp soaking pool, second grinding machine and fourth dewatering treatment on the forage treated by the pulp pool to obtain a cellulose product; and the three times of dehydration and four times of dehydration are to add water to carry out dehydration treatment after cleaning on the forage treated by the slurry pool.
During crushing treatment, the solid content of the straw after fermentation treatment is 40-60%; the solid content of the forage entering the primary dehydrator is 20-25%, and the solid content of the extruded forage is 30-40%; the solid content of the forage entering the secondary dehydrator is 15-20%, and the solid content of the extruded forage is 30-40%.
The water obtained by three times of dehydration and four times of dehydration is reused for the front end (including water for washing grass and the like); thus, the quantity of the extrusion liquid is controlled, the concentration of the extrusion liquid is improved, water can be saved, and the heat energy consumed by concentrating the liquid can be reduced.
The primary dehydrator is provided with a liquid with 25-35% of solid content in the discharge part except that the forage is extruded from the extrusion port and enters the secondary dehydrator, and the finished product is obtained after drying treatment.
After four times of dehydration, further carrying out 1-times of dehydration treatment; or removing four dehydrations.
The straw is replaced by other non-grain biological materials; the other non-grain biological materials include, but are not limited to, reed, branch, wood, bamboo, hemp stalk, chinese alpine rush, and megaterium.
The invention has no emission of harmful substances, excellent environmental protection performance, convenient operation and high efficiency. The invention washes the forage, washes the pulp, the waste water can be regarded as the fertilizer; is significantly different from the traditional pulp preparation which only washes materials and generates more wastewater.
The invention is further described below with reference to the drawings and examples.
FIG. 1 is a schematic flow chart of one embodiment of the present invention.
Description of the embodiments
Examples
A method for producing cellulose from agricultural straw, comprising the steps of:
(1) Crushing straw forage subjected to fermentation treatment by a crusher 1, then feeding the crushed straw forage into a first material pool 2, adding liquid extruded by a secondary spiral dehydrator, stirring, feeding the liquid into a primary spiral dehydrator 3, feeding the forage extruded by the primary spiral dehydrator into a second material pool 4, wherein the extruded liquid is humic acid water fertilizer, and the solid content is 20%;
(2) The forage enters a second material pool, liquid filtered by three times of dehydration (pressure screen) is added into the second material pool, stirred and then conveyed into a secondary spiral dehydrator 5, and the extruded water enters a first material pool 2; the extruded forage enters a slurry pool 6, the solid content is 40%, and the concentration of the extruded liquid is 7%;
(3) The forage treated by the slurry pond is dehydrated for three times by a first grinder 7 and a dehydrator 8 in sequence, soaked by a slurry soaking pond 9, dehydrated for four times by a second grinder 10 and a dehydrator 11 to obtain a cellulose product; the three times of dehydration and four times of dehydration are that water is added to carry out dehydration treatment after cleaning (namely pulp washing) on the forage treated by the pulp pool.
During crushing treatment, the solid content of the straw after fermentation treatment is 60%; the solid content of the forage entering the primary spiral dehydrator is 22%, and the solid content of the extruded forage is 35%; the solid content of the forage entering the secondary spiral dehydrator is 16%, and the solid content of the extruded forage is 37%.
The water obtained by three times of dehydration and four times of dehydration is reused for the front end (including water for washing grass and the like); thus, the quantity of the extrusion liquid is controlled, the concentration of the extrusion liquid is improved, water can be saved, and the heat energy consumed by concentrating the liquid can be reduced.
The primary screw dehydrator is provided with a liquid with 27% solid content in the discharge part except that the forage is extruded from the extrusion port and enters the secondary screw dehydrator, and the finished product is obtained by drying treatment of the drier 12.
Examples
A method for producing cellulose from agricultural straw, comprising the steps of:
(1) Crushing straw forage subjected to fermentation treatment, then feeding the straw forage into a first material pool, adding liquid extruded by a secondary spiral dehydrator, stirring, feeding the liquid into a primary spiral dehydrator, feeding the forage extruded by the primary spiral dehydrator into a second material pool, wherein the extruded liquid is humic acid water fertilizer, and the solid content is 30%;
(2) The forage enters a second material pool, liquid filtered by three times of dehydration (pressure screen) is added into the second material pool, stirred and then conveyed into a secondary spiral dehydrator, and the extruded water enters a first material pool; the extruded forage enters a slurry pool, the solid content is 45%, and the concentration of the extruded liquid is 4%;
(3) Sequentially carrying out first grinding machine, third dewatering, soaking in a pulp soaking pool, second grinding machine and fourth dewatering treatment on the forage treated by the pulp pool to obtain a cellulose product; the three times of dehydration and four times of dehydration are that water is added to carry out dehydration treatment after cleaning (namely pulp washing) on the forage treated by the pulp pool.
The water added before entering the primary spiral dehydrator in the step (1) is water obtained by secondary dehydration of the secondary spiral dehydrator; the water added in the material pool in the step (1) is the liquid filtered by the pulp pressure screen.
During crushing treatment, the solid content of the straw after fermentation treatment is 45%; the solid content of the forage entering the primary spiral dehydrator is 25 percent, and the solid content of the extruded forage is 30 percent; the solid content of the forage entering the secondary spiral dehydrator is 18 percent, and the solid content of the extruded forage is 33 percent.
The water obtained by three times of dehydration and four times of dehydration is reused for the front end (including water for washing grass and the like); thus, the quantity of the extrusion liquid is controlled, the concentration of the extrusion liquid is improved, water can be saved, and the heat energy consumed by concentrating the liquid can be reduced.
The first-stage spiral dehydrator is provided with liquid with 35% solid content in the discharge part except that the forage is extruded from the extrusion port and enters the second-stage spiral dehydrator, and the finished product is obtained after drying treatment.
Claims (5)
1. A method for producing cellulose from agricultural straw, which is characterized by comprising the following steps: comprises the following steps:
(1) Feeding the straw forage subjected to fermentation treatment into a first material pool, adding liquid extruded by a secondary dehydrator, stirring, feeding the liquid into a primary dehydrator, feeding the forage extruded by the primary dehydrator into a second material pool, wherein the extruded liquid is humic acid water fertilizer with the solid content of 10-30%;
(2) The forage enters a second material pool, liquid dehydrated for three times is added into the second material pool, stirred and then conveyed into a secondary dehydrator, and the extruded water enters a first material pool; the extruded forage enters a slurry pool, the solid content is 35-45%, and the concentration of the extruded liquid is 3-8%;
(3) Sequentially carrying out first grinding machine, third dewatering, soaking in a pulp soaking pool, second grinding machine and fourth dewatering treatment on the forage treated by the pulp pool to obtain a cellulose product; and the three times of dehydration and four times of dehydration are to add water to carry out dehydration treatment after cleaning on the forage treated by the slurry pool.
2. A method for producing cellulose from agricultural straw according to claim 1, characterized in that:
during crushing treatment, the solid content of the straw after fermentation treatment is 40-60%; the solid content of the forage entering the primary dehydrator is 20-25%, and the solid content of the extruded forage is 30-40%; the solid content of the forage entering the secondary dehydrator is 15-20%, and the solid content of the extruded forage is 30-40%.
3. A method for producing cellulose from agricultural straw according to claim 1 or 2, characterized in that: the water obtained by the three times of dehydration and the four times of dehydration is reused at the front end; thus, the quantity of the extrusion liquid is controlled, the concentration of the extrusion liquid is improved, water can be saved, and the heat energy consumed by concentrating the liquid can be reduced.
4. A method for producing cellulose from agricultural straw according to claim 1 or 2, characterized in that: the primary dehydrator is provided with a liquid with 25-35% of solid content in the discharge part except that the forage is extruded from the extrusion port and enters the secondary dehydrator, and the finished product is obtained after drying treatment.
5. A method for producing cellulose from agricultural straw according to claim 1, characterized in that: after four times of dehydration, further carrying out 1-times of dehydration treatment; or removing four dehydrations.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310293751.6A CN116289286A (en) | 2023-03-24 | 2023-03-24 | Method for producing cellulose from agricultural straw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310293751.6A CN116289286A (en) | 2023-03-24 | 2023-03-24 | Method for producing cellulose from agricultural straw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116289286A true CN116289286A (en) | 2023-06-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310293751.6A Pending CN116289286A (en) | 2023-03-24 | 2023-03-24 | Method for producing cellulose from agricultural straw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116289286A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108179650A (en) * | 2017-12-05 | 2018-06-19 | 白博 | A kind of non-wood fiber wheat straw production technology using black liquor of pulp making production Yellow humic acid fertilizer |
| CN112553933A (en) * | 2020-12-04 | 2021-03-26 | 上海定业贸易有限公司 | Multi-section straw fiber slurry extraction method |
| CN112796150A (en) * | 2020-12-24 | 2021-05-14 | 珠海横琴森禾生物科技控股有限公司 | Preparation method of paper pulp fiber |
-
2023
- 2023-03-24 CN CN202310293751.6A patent/CN116289286A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108179650A (en) * | 2017-12-05 | 2018-06-19 | 白博 | A kind of non-wood fiber wheat straw production technology using black liquor of pulp making production Yellow humic acid fertilizer |
| CN112553933A (en) * | 2020-12-04 | 2021-03-26 | 上海定业贸易有限公司 | Multi-section straw fiber slurry extraction method |
| CN112796150A (en) * | 2020-12-24 | 2021-05-14 | 珠海横琴森禾生物科技控股有限公司 | Preparation method of paper pulp fiber |
Non-Patent Citations (1)
| Title |
|---|
| 李元喜等: ""农作物秸秆全元素利用技术研究与应用 ——以山东某公司秸秆综合利用项目为例"", 《造纸装备及材料》, pages 151 - 153 * |
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