CN112411229A - Method for manufacturing sorghum stalk fiber pulp for packaging paper by ultrasonic wave - Google Patents
Method for manufacturing sorghum stalk fiber pulp for packaging paper by ultrasonic wave Download PDFInfo
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- CN112411229A CN112411229A CN202011220436.3A CN202011220436A CN112411229A CN 112411229 A CN112411229 A CN 112411229A CN 202011220436 A CN202011220436 A CN 202011220436A CN 112411229 A CN112411229 A CN 112411229A
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- manufacturing
- feeding
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- stalk fiber
- pumping
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- 235000011684 Sorghum saccharatum Nutrition 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 31
- 239000000835 fiber Substances 0.000 title claims abstract description 25
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- 238000004806 packaging method and process Methods 0.000 title claims abstract description 12
- 240000006394 Sorghum bicolor Species 0.000 title claims description 28
- 238000005086 pumping Methods 0.000 claims abstract description 18
- 239000002893 slag Substances 0.000 claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000000428 dust Substances 0.000 claims abstract description 10
- 238000012216 screening Methods 0.000 claims abstract description 8
- 229910003460 diamond Inorganic materials 0.000 claims abstract description 6
- 239000010432 diamond Substances 0.000 claims abstract description 6
- 238000010025 steaming Methods 0.000 claims abstract description 6
- 239000002562 thickening agent Substances 0.000 claims abstract description 6
- 238000009210 therapy by ultrasound Methods 0.000 claims abstract description 5
- 238000005406 washing Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims 2
- 238000004537 pulping Methods 0.000 abstract description 6
- 239000002994 raw material Substances 0.000 abstract description 6
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 238000012856 packing Methods 0.000 abstract description 2
- 241000209072 Sorghum Species 0.000 abstract 4
- 238000010411 cooking Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 244000025254 Cannabis sativa Species 0.000 description 3
- 229920001131 Pulp (paper) Polymers 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000000644 propagated effect Effects 0.000 description 2
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 description 1
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 229920002522 Wood fibre Polymers 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 235000009120 camo Nutrition 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 235000005607 chanvre indien Nutrition 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000011487 hemp Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000009527 percussion Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 230000002792 vascular Effects 0.000 description 1
- 239000002025 wood fiber Substances 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
-
- 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
- D21C7/00—Digesters
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
- D21D1/00—Methods of beating or refining; Beaters of the Hollander type
- D21D1/20—Methods of refining
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Paper (AREA)
Abstract
The invention provides a method for manufacturing sorghum stalk fiber pulp for packaging paper by ultrasonic waves, and belongs to the technical field of pulping and papermaking. The method comprises the following steps: the method comprises the following steps of feeding raw sorghum stalks into a crusher by a conveying belt to be crushed to 3-5 cm, removing dust, screening by a diamond vibrating screen, feeding into a digester, steaming for 8 hours at the water temperature of 85-105 ℃, feeding into a high-concentration mill by a feeder to perform coarse grinding, adding water to dilute to the concentration of 2.0%, feeding into an ultrasonic reactor by a pump, performing ultrasonic treatment, pumping into a slag remover to remove heavy slag, pumping good pulp into a cylinder thickener to be washed and concentrated to the concentration of 2.5-3.0%, and pumping into a coarse pulp tank for later use. The invention is based on the technical principle of ultrasonic waves, uses sorghum stalks as raw materials to prepare the fiber pulp for the packaging paper, not only solves the burden of farmers, but also relieves the problem of shortage of papermaking raw materials. Moreover, the method generates less black liquor and has better environmental protection property; the prepared sorghum stalk fiber pulp has excellent performance and is suitable for manufacturing packing paper.
Description
Technical Field
The invention relates to the technical field of pulping and papermaking, in particular to a method for manufacturing sorghum stalk fiber pulp for packaging paper by ultrasonic waves.
Background
Plant fiber raw materials for papermaking can be roughly classified into three categories: wood fibers, grass fibers, cotton and hemp fibers. In recent years, forestry resources in China are disorderly cut and felled, so that the forestry resources in China are seriously damaged, and therefore the state increases the control strength on the forestry resources. The paper stock market has also been impacted.
The sorghum stalks are one of the varieties of crops, become useless objects after autumn, are thrown away by farmers in the field, and are burnt in the field after the spring of the next year, thereby not only increasing the pressure of environmental protection, but also wasting resources. Under the condition, if the sorghum stalks are used as raw materials and the characteristics of high fiber content are utilized to manufacture paper pulp, the resource utilization way of the sorghum stalks is expected to be expanded.
However, in general, grass plants are mostly vascular fibers, and contain therein foreign cells, which have many adverse effects on paper making, are poorly interlaced with fibers, directly affect the strength of paper, and have a large surface area, so that the absorbability of the foreign cells also affects the dimensional stability of paper. Therefore, the original pulping method utilizes alkaline cooking to disintegrate the mixed cell groups into single cell lines and strengthen washing, screening and purifying. The method can remove the mixed cells as much as possible, and can improve the strength of various physical indexes of the paper. But it is characterized in that a large amount of black liquor generated in the pulp in the cooking process can not be treated, if the black liquor is directly discharged, the black liquor can cause pollution, and if the black liquor is not discharged, the black liquor can not be stored for a long time.
Disclosure of Invention
The invention aims to provide a method for manufacturing sorghum stalk fiber pulp for packaging paper by ultrasonic waves aiming at the technical defects of the prior art, so as to solve the technical problem that the resource utilization way of sorghum stalks needs to be expanded.
The invention aims to solve another technical problem that the quality of the obtained paper pulp and the quality of the finished paper need to be improved when the sorghum stalks are used for pulping and papermaking.
The invention also aims to solve the technical problem of how to reduce the generation and the discharge of black liquor in the process of pulping and papermaking by using sorghum stalks.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
the method for manufacturing the sorghum stalk fiber pulp for the packaging paper by ultrasonic waves comprises the following steps: the method comprises the following steps of feeding raw sorghum stalks into a crusher by a conveying belt to be crushed to 3-5 cm, removing dust, screening by a diamond vibrating screen, feeding into a digester, steaming for 8 hours at the water temperature of 85-105 ℃, feeding into a high-concentration mill by a feeder to perform coarse grinding, adding water to dilute to the concentration of 2.0%, feeding into an ultrasonic reactor by a pump, performing ultrasonic treatment, pumping into a slag remover to remove heavy slag, pumping good pulp into a cylinder thickener to be washed and concentrated to the concentration of 2.5-3.0%, and pumping into a coarse pulp tank for later use.
Preferably, the dust removal is realized by using a fan or a water washing device.
Preferably, after the rhombus vibrating screen is used for screening, the material is fed into the digester by a screw conveyor or a conveyer belt.
Preferably, the digester is a vertical pot or a pipe-connected digester.
Preferably, the ultrasonic reactor comprises a generator, a heat exchanger and a reaction vessel.
Preferably, the heavy slag is re-cooked before being sent to the digester.
The invention utilizes the special technical characteristics of ultrasonic waves to prepare the sorghum stalk fiber pulp. The ultrasonic wave is a sound wave with frequency beyond human hearing range, the ultrasonic wave is propagated by an elastic medium, when the ultrasonic wave is propagated, the particles in the elastic medium are vibrated, and energy is transferred through the medium according to the propagation direction of the ultrasonic wave, the wave can be divided into longitudinal wave and transverse wave, both the longitudinal wave and the transverse wave can be transferred in the solid, only the longitudinal wave can be transferred in the liquid and the gas, and an elastic weak area also exists in the reactor, namely, the gas core expands and grows under the action of gas or dust in the liquid, and is filled with surrounding liquid steam or gas, and the cavity collapses and breaks due to the great difference of internal and external pressure, so that the concentrated sound field energy is released in extremely short time and extremely small space. The medium is locally formed into high-temperature environment with hundreds of to thousands of K and atmosphere pressure environment exceeding hundreds of atmospheric pressure, and generates great impact force, so that the medium plays a role of intense stirring, simultaneously generates a large amount of micro bubbles, the micro bubbles are circularly continued when being used as new gas nuclei, the group cells of impurities in the primary pulp are disintegrated into single cells under the specific action of the micro bubbles, and then the single cells are washed, screened and purified. It can also have the same effect as soda cooking pulping, and can raise pulp quality and yield.
The invention is based on the technical principle of ultrasonic waves, uses sorghum stalks as raw materials to prepare the fiber pulp for the packaging paper, not only solves the burden of farmers, but also relieves the problem of shortage of papermaking raw materials to a certain extent. Moreover, the method generates less black liquor and has better environmental protection property; the prepared sorghum stalk fiber pulp has excellent performance and is suitable for manufacturing packing paper.
Drawings
FIG. 1 is a process flow diagram of the present invention.
Detailed Description
Hereinafter, specific embodiments of the present invention will be described in detail. Well-known structures or functions may not be described in detail in the following embodiments in order to avoid unnecessarily obscuring the details. Approximating language, as used herein in the following examples, may be applied to identify quantitative representations that could permissibly vary in number without resulting in a change in the basic function. Unless defined otherwise, technical and scientific terms used in the following examples have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
Example 1
The method comprises the steps of feeding raw sorghum stalks into a crusher by a conveyor belt to be crushed into 3-5 cm, carrying out dust removal (water or wind power), then screening by a diamond vibrating screen (removing part of impurities firstly), then feeding into a digester by a screw or the conveyor belt (connecting pipe cooking or vertical pot), steaming for 8 hours at the temperature of 85-105 ℃, then feeding into a high-concentration mill by a feeder to carry out coarse grinding, then adding water to dilute for 2.0%, feeding into an ultrasonic reactor by a pump (the ultrasonic reactor consists of three parts which are respectively a generator, a heat exchanger and a reaction container), passing through the ultrasonic reactor, then pumping into a slag remover to remove heavy slag (the heavy slag is sent into the digester and is cooked again), pumping good pulp into a cylinder thickener to wash and concentrate for 2.5-3.0%, and pumping into a coarse pulp tank for later use.
The method is utilized to prepare the paper pulp for three times respectively, and the finished paper is prepared by adopting the conventional paper making method, and then the performance of the paper is detected as follows:
TABLE 1 paper Property test results
| Name (R) | Concentration% | Degree of percussion SR | Wet weight | Whiteness degree |
| Test 1 | 3.0 | 31 | 3.5 | 40 |
| Test 2 | 2.6 | 29 | 3.0 | 42 |
| Test 3 | 2.3 | 26.5 | 3.1 | 40.5 |
The test data show that the method for preparing the pulp for the packaging paper by using the sorghum stalks is completely feasible.
Example 2
The method for manufacturing the sorghum stalk fiber pulp for the packaging paper by ultrasonic waves comprises the following steps: the method comprises the following steps of feeding raw sorghum stalks into a crusher by a conveying belt to be crushed to 3-5 cm, removing dust, screening by a diamond vibrating screen, feeding into a digester, steaming for 8 hours at the water temperature of 85-105 ℃, feeding into a high-concentration mill by a feeder to perform coarse grinding, adding water to dilute to the concentration of 2.0%, feeding into an ultrasonic reactor by a pump, performing ultrasonic treatment, pumping into a slag remover to remove heavy slag, pumping good pulp into a cylinder thickener to be washed and concentrated to the concentration of 2.5-3.0%, and pumping into a coarse pulp tank for later use.
Wherein, the dust removal is realized by utilizing a fan or water washing equipment. After the rhombus vibrating screen is screened, the material is sent into a digester by a screw conveyer or a conveyer belt. The digester is a vertical pot or a connecting pipe for cooking. The ultrasonic reactor comprises a generator, a heat exchanger and a reaction container. And (5) before the heavy slag is sent to the digester, the heavy slag is steamed again.
Example 3
The method for manufacturing the sorghum stalk fiber pulp for the packaging paper by ultrasonic waves comprises the following steps: the method comprises the following steps of feeding raw sorghum stalks into a crusher by a conveying belt to be crushed to 3-5 cm, removing dust, screening by a diamond vibrating screen, feeding into a digester, steaming for 8 hours at the water temperature of 85-105 ℃, feeding into a high-concentration mill by a feeder to perform coarse grinding, adding water to dilute to the concentration of 2.0%, feeding into an ultrasonic reactor by a pump, performing ultrasonic treatment, pumping into a slag remover to remove heavy slag, pumping good pulp into a cylinder thickener to be washed and concentrated to the concentration of 2.5-3.0%, and pumping into a coarse pulp tank for later use.
The embodiments of the present invention have been described in detail, but the description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention. Any modification, equivalent replacement, and improvement made within the scope of the application of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The method for manufacturing the sorghum stalk fiber pulp for the packaging paper by ultrasonic waves is characterized by comprising the following steps: the method comprises the following steps of feeding raw sorghum stalks into a crusher by a conveying belt to be crushed to 3-5 cm, removing dust, screening by a diamond vibrating screen, feeding into a digester, steaming for 8 hours at the water temperature of 85-105 ℃, feeding into a high-concentration mill by a feeder to perform coarse grinding, adding water to dilute to the concentration of 2.0%, feeding into an ultrasonic reactor by a pump, performing ultrasonic treatment, pumping into a slag remover to remove heavy slag, pumping good pulp into a cylinder thickener to be washed and concentrated to the concentration of 2.5-3.0%, and pumping into a coarse pulp tank for later use.
2. The method of ultrasonically manufacturing sorghum stalk fiber pulp for wrapping paper according to claim 1, wherein the dust removal is performed by using a blower or a water washing apparatus.
3. The ultrasonic method for manufacturing sorghum stalk fiber slurry for wrapping paper according to claim 1, wherein after the screen of the diamond-shaped vibrating screen, the material is fed into a digester by a screw conveyor or a conveyer belt.
4. The method of ultrasonically manufacturing sorghum stalk fiber pulp for wrapping paper according to claim 1, wherein the digester is a vertical pot or a pipe-connected digester.
5. The method of ultrasonically manufacturing sorghum stalk fiber pulp for wrapping paper according to claim 1, wherein the ultrasonic reactor comprises a generator, a heat exchanger and a reaction vessel.
6. The method of ultrasonically manufacturing sorghum stalk fiber slurry for wrapping paper according to claim 1, wherein the heavy residues are re-cooked before being fed to the digester.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011220436.3A CN112411229A (en) | 2020-11-05 | 2020-11-05 | Method for manufacturing sorghum stalk fiber pulp for packaging paper by ultrasonic wave |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011220436.3A CN112411229A (en) | 2020-11-05 | 2020-11-05 | Method for manufacturing sorghum stalk fiber pulp for packaging paper by ultrasonic wave |
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| Publication Number | Publication Date |
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| CN112411229A true CN112411229A (en) | 2021-02-26 |
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|---|---|---|---|
| CN202011220436.3A Pending CN112411229A (en) | 2020-11-05 | 2020-11-05 | Method for manufacturing sorghum stalk fiber pulp for packaging paper by ultrasonic wave |
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|---|---|---|---|---|
| WO2009018469A1 (en) * | 2007-07-31 | 2009-02-05 | Hoffman Richard B | System and method of preparing pre-treated biorefinery feedstock from raw and recycled waste cellulosic biomass |
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| CN105906398A (en) * | 2016-04-13 | 2016-08-31 | 齐鲁工业大学 | Method for preparing organic fertilizer through processing agriculture and forestry wastes by using organic solvent |
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| CN106636218A (en) * | 2017-03-16 | 2017-05-10 | 福建农林大学 | Method for preparing biogas and paper pulp from energy grass |
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-
2020
- 2020-11-05 CN CN202011220436.3A patent/CN112411229A/en active Pending
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Application publication date: 20210226 |