CN112458779A - Clean pulping process for trace hydrolyzed straw - Google Patents
Clean pulping process for trace hydrolyzed straw Download PDFInfo
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- CN112458779A CN112458779A CN202011304791.9A CN202011304791A CN112458779A CN 112458779 A CN112458779 A CN 112458779A CN 202011304791 A CN202011304791 A CN 202011304791A CN 112458779 A CN112458779 A CN 112458779A
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- straw
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- pulping process
- hydrolyzed
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- 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
- D21C5/005—Treatment of cellulose-containing material with microorganisms or enzymes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/04—Manufacture of substantially flat articles, e.g. boards, from particles or fibres from fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
-
- 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
- D21C1/00—Pretreatment of the finely-divided materials before digesting
- D21C1/02—Pretreatment of the finely-divided materials before digesting with water or steam
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
- D21H11/12—Pulp from non-woody plants or crops, e.g. cotton, flax, straw, bagasse
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Chemical & Material Sciences (AREA)
- Biochemistry (AREA)
- Microbiology (AREA)
- Paper (AREA)
Abstract
The invention discloses a clean pulping process of trace hydrolyzed straw, belonging to the technical field of pulping, comprising the following steps: firstly, feeding straws into a multi-roller automatic feeding device, and uniformly scattering loose straw bags; conveying the scattered straws to a straw cutter through a belt for cutting, and putting the cut straws into a multi-roller dedusting and silk kneading machine for preliminary silk separation; and conveying the primarily devillicated straws to a drum-type grass washing machine for cleaning and dedusting, and automatically loading the cleaned straws into a multifunctional combined cooker for cooking through a fan-shaped feeder. The invention is green and environment-friendly, the straw fiber is softened and separated by adopting a physical hydrolysis method, and the prepared slurry has uniform quality, high fineness, no pollution in the pulping process and high finished product quality.
Description
Technical Field
The invention relates to a pulping process, in particular to a clean pulping process for trace hydrolyzed straws, and belongs to the technical field of pulping.
Background
According to the softening and separating effects of chemicals on straw fibers in the traditional rice and wheat straw chemical pulping process, the effect of the chemicals on wheat straws is replaced by a combined hydrolysis process, and the chemicals are abandoned, so that the pulping process with trace water consumption and more cleanness and environmental protection is realized.
The existing traditional rice and wheat straw chemical pulping technology has the advantages of large water consumption, 120 tons of pulp water consumption, high water treatment cost and serious water pollution, and the novel micro-hydrolysis technology has the pulp water consumption of 1.8 tons per ton.
The traditional chemical pulping process of rice and wheat straws has the advantages of large investment, complex flow, serious environmental pollution and large energy consumption, and the novel clean pulping process of hydrolyzed straws is superior to the traditional chemical pulping process of rice and wheat straws in the aspects of analysis.
Disclosure of Invention
The invention mainly aims to solve the defects of the prior art and provide a clean pulping process of trace hydrolyzed straw.
The purpose of the invention can be achieved by adopting the following technical scheme:
a clean pulping process of trace hydrolyzed straw comprises the following steps:
step 1: preparing materials by a dry method, namely feeding straws into a multi-roller automatic feeding device, and uniformly scattering loose straw bags;
step 2: conveying the scattered straws to a straw cutter through a belt for cutting, and putting the cut straws into a multi-roller dedusting and silk kneading machine for preliminary silk separation;
and step 3: conveying the primarily devillicated straws to a drum-type grass washing machine for cleaning and dedusting, automatically loading the cleaned straws into a multifunctional combined cooker through a fan-shaped feeder for cooking, and circularly cooking and hydrolyzing;
and 4, step 4: carrying out high-pressure spraying on the steamed straw fibers to a pressure spiral conveying pipe through the pressure spiral conveying pipe;
and 5: and storing the fiber slurry into a storage tank through a pressure spiral conveying pipe, adding water, storing and fermenting, sequentially and spirally conveying the slurry to a high-concentration disc mill and a medium-concentration disc mill after fermentation is finished, dewatering after the disc mill is finished, and briquetting to obtain a finished product.
Preferably, in the step 2, the straw is cut into straw sections of 2-15 cm by the straw cutter.
Preferably, in the step 3, the cooking temperature is 80-260 ℃, the cooking time is 3-5 sections, and the cooking time is 40-45 min.
Preferably, the multi-roller dedusting and kneading machine preliminarily removes dust from the straws, and kneads the dedusted straws to separate the straw fibers, so as to realize preliminary filament separation.
Preferably, in the step 5, the concentration of the slurry is adjusted to 15-18% before the disc grinding.
Preferably, the pressure spiral conveying pipe carries out fiber splitting while conveying the straws.
Preferably, the multi-roller automatic feeding device, the multi-roller dedusting and kneading machine, the fan-shaped feeder, the multifunctional combined boiler, the pressure spiral conveying pipe and the conical spiral thread separator are conveyed by the belt conveyor.
Preferably, in the step 5, the dehydration rate of the slurry dehydration is 60-75%.
Preferably, the conditions of the circulating cooking hydrolysis are that the pressure of the storage tank is 1.5-7.5Kg, and the temperature of water is 10-100 ℃.
The invention has the beneficial technical effects that: according to the trace hydrolyzed straw clean pulping process, the trace hydrolyzed straw clean pulping process provided by the invention is green and environment-friendly, straw fibers are softened and separated by adopting a physical hydrolysis method, and the prepared pulp is uniform in quality, high in fineness, free of pollution in the pulping process and high in finished product quality.
Detailed Description
In order to make the technical solutions of the present invention more clear and definite for those skilled in the art, the present invention is further described in detail with reference to the following examples, but the embodiments of the present invention are not limited thereto.
The clean pulping process of the trace hydrolyzed straw provided by the embodiment comprises the following steps:
step 1: preparing materials by a dry method, namely feeding straws into a multi-roller automatic feeding device, and uniformly scattering loose straw bags;
step 2: conveying the scattered straws to a straw cutter through a belt for cutting, and putting the cut straws into a multi-roller dedusting and silk kneading machine for preliminary silk separation;
and step 3: conveying the primarily devillicated straws to a drum-type grass washing machine for cleaning and dedusting, automatically loading the cleaned straws into a multifunctional combined cooker through a fan-shaped feeder for cooking, and circularly cooking and hydrolyzing;
and 4, step 4: carrying out high-pressure spraying on the steamed straw fibers to a pressure spiral conveying pipe through the pressure spiral conveying pipe;
and 5: and storing the fiber slurry into a storage tank through a pressure spiral conveying pipe, adding water, storing and fermenting, sequentially and spirally conveying the slurry to a high-concentration disc mill and a medium-concentration disc mill after fermentation is finished, dewatering after the disc mill is finished, and briquetting to obtain a finished product.
In the step 2, the straw is cut into straw sections of 2-15 cm by the straw cutter. In the step 3, the cooking temperature is 80-260 ℃, the cooking time is 3-5 sections, and the cooking time is 40-45 min. The multi-roller dedusting and kneading machine preliminarily removes dust of the rice straws, and kneads the straws after dust removal, so that the straw fibers are separated, and preliminary filament separation is realized.
In step 5, the concentration of the slurry is adjusted to 15-18% before disc grinding. The pressure spiral conveying pipe carries out fiber splitting while conveying the straws. The multi-roller automatic feeding device, the multi-roller dedusting and kneading machine, the fan-shaped feeder, the multifunctional combined boiler, the pressure spiral conveying pipe and the conical spiral thread separator are conveyed by the belt conveyor. In step 5, the dehydration rate of the slurry dehydration is 60-75%. The conditions of the circulating cooking hydrolysis are that the pressure of the storage tank is 1.5-7.5Kg, and the temperature of water is 10-100 ℃.
Example 1:
a clean pulping process of trace hydrolyzed straw comprises the following steps:
step 1: preparing materials by a dry method, namely feeding straws into a multi-roller automatic feeding device, and uniformly scattering loose straw bags;
step 2: conveying the scattered straws to a straw cutter through a belt, cutting the straws into 5cm straw sections, putting the straws subjected to the cutting into a multi-roller dedusting and kneading machine for preliminary filament separation, kneading the straws subjected to the dedusting to separate straw fibers, and realizing preliminary filament separation;
and step 3: conveying the primarily divided straws to a drum-type grass washing machine for cleaning and dedusting, automatically loading the cleaned straws into a multifunctional combined cooker through a fan-shaped feeder for cooking, wherein the pressure of a storage tank is 1.5Kg, the temperature of water injection is 10 ℃, the cooking temperature is 80 ℃, the cooking time period is 3 sections, and the cooking time is 40 min;
and 4, step 4: carrying out high-pressure spraying on the steamed straw fibers to a pressure spiral conveying pipe through the pressure spiral conveying pipe;
and 5: the fiber pulp is stored in a storage tank through a pressure spiral conveying pipe and added with water for storage and fermentation, after fermentation is completed, the pulp is sequentially and spirally conveyed to a high-concentration disc mill and a medium-concentration disc mill, the pulp concentration is adjusted to 15% before the disc mill, after the disc mill is finished, the pulp concentration is 1%, dehydration is carried out, the dehydration rate is 60%, and pressing blocks are formed into finished products.
Example 2:
a clean pulping process of trace hydrolyzed straw comprises the following steps:
step 1: preparing materials by a dry method, namely feeding straws into a multi-roller automatic feeding device, and uniformly scattering loose straw bags;
step 2: conveying the scattered straws to a straw cutter through a belt, cutting the straws into 5cm straw sections, putting the straws subjected to the cutting into a multi-roller dedusting and kneading machine for preliminary filament separation, kneading the straws subjected to the dedusting to separate straw fibers, and realizing preliminary filament separation;
and step 3: conveying the primarily devillicated straws to a drum-type grass washing machine for cleaning and dedusting, automatically loading the cleaned straws into a multifunctional combined cooker through a fan-shaped feeder for cooking, wherein the pressure of a storage tank is 2.5Kg, the temperature of water injection is 45 ℃, the cooking temperature is 240 ℃, the cooking time period is 3 sections, and the cooking time is 41 min;
and 4, step 4: carrying out high-pressure spraying on the steamed straw fibers to a pressure spiral conveying pipe through the pressure spiral conveying pipe;
and 5: storing the fiber pulp into a storage tank through a pressure spiral conveying pipe, adding water, storing and fermenting, after fermentation, sequentially and spirally conveying the pulp to a high-concentration disc mill and a medium-concentration disc mill, adjusting the pulp concentration to 16% before the disc mill, after the disc mill is finished, adjusting the pulp concentration to 1.1%, dehydrating, and pressing into blocks to obtain the finished product, wherein the dehydration rate is 62%.
Example 3:
a clean pulping process of trace hydrolyzed straw comprises the following steps:
step 1: preparing materials by a dry method, namely feeding straws into a multi-roller automatic feeding device, and uniformly scattering loose straw bags;
step 2: conveying the scattered straws to a straw cutter through a belt, cutting the straws into 5cm straw sections, putting the straws subjected to the cutting into a multi-roller dedusting and kneading machine for preliminary filament separation, kneading the straws subjected to the dedusting to separate straw fibers, and realizing preliminary filament separation;
and step 3: conveying the primarily devillicated straws to a drum-type grass washing machine for cleaning and dedusting, automatically loading the cleaned straws into a multifunctional combined cooker through a fan-shaped feeder for cooking, wherein the pressure of a storage tank is 4.5Kg, the temperature of water injection is 80 ℃, the cooking temperature is 240 ℃, the cooking time period is 3 sections, and the cooking time is 42 min;
and 4, step 4: carrying out high-pressure spraying on the steamed straw fibers to a pressure spiral conveying pipe through the pressure spiral conveying pipe;
and 5: storing the fiber pulp into a storage tank through a pressure spiral conveying pipe, adding water, storing and fermenting, after fermentation, sequentially and spirally conveying the pulp to a high-concentration disc mill and a medium-concentration disc mill, adjusting the pulp concentration to 17% before the disc mill, after the disc mill is finished, adjusting the pulp concentration to 1.2%, dehydrating with the dehydration rate of 64%, and briquetting to obtain a finished product.
Example 4:
a clean pulping process of trace hydrolyzed straw comprises the following steps:
step 1: preparing materials by a dry method, namely feeding straws into a multi-roller automatic feeding device, and uniformly scattering loose straw bags;
step 2: conveying the scattered straws to a straw cutter through a belt, cutting the straws into 5cm straw sections, putting the straws subjected to the cutting into a multi-roller dedusting and kneading machine for preliminary filament separation, kneading the straws subjected to the dedusting to separate straw fibers, and realizing preliminary filament separation;
and step 3: conveying the primarily divided straws to a drum-type grass washing machine for cleaning and dedusting, automatically loading the cleaned straws into a multifunctional combined cooker through a fan-shaped feeder for cooking, wherein the conditions of cyclic cooking hydrolysis are that the pressure of a storage tank is 5.5Kg, the temperature of water injection is 90 ℃, the cooking temperature is 240 ℃, the cooking time period is 4 sections, and the cooking time is 43 min;
and 4, step 4: carrying out high-pressure spraying on the steamed straw fibers to a pressure spiral conveying pipe through the pressure spiral conveying pipe;
and 5: storing the fiber pulp into a storage tank through a pressure spiral conveying pipe, adding water, storing and fermenting, after fermentation, sequentially and spirally conveying the pulp to a high-concentration disc mill and a medium-concentration disc mill, adjusting the pulp concentration to 17% before the disc mill, after the disc mill is finished, adjusting the pulp concentration to 1.4%, dehydrating with the dehydration rate of 74%, and briquetting to obtain a finished product.
Example 5:
a clean pulping process of trace hydrolyzed straw comprises the following steps:
step 1: preparing materials by a dry method, namely feeding straws into a multi-roller automatic feeding device, and uniformly scattering loose straw bags;
step 2: conveying the scattered straws to a straw cutter through a belt, cutting the straws into 5cm straw sections, putting the straws subjected to the cutting into a multi-roller dedusting and kneading machine for preliminary filament separation, kneading the straws subjected to the dedusting to separate straw fibers, and realizing preliminary filament separation;
and step 3: conveying the primarily divided straws to a drum-type grass washing machine for cleaning and dedusting, automatically loading the cleaned straws into a multifunctional combined cooker through a fan-shaped feeder for cooking, wherein the pressure of a storage tank is 7.5Kg, the temperature of water injection is 100 ℃, the cooking temperature is 260 ℃, the cooking time period is 5 sections, and the cooking time is 45 min;
and 4, step 4: carrying out high-pressure spraying on the steamed straw fibers to a pressure spiral conveying pipe through the pressure spiral conveying pipe;
and 5: storing the fiber pulp into a storage tank through a pressure spiral conveying pipe, adding water, storing and fermenting, after fermentation, sequentially and spirally conveying the pulp to a high-concentration disc mill and a medium-concentration disc mill, adjusting the pulp concentration to 18% before the disc mill, after the disc mill is finished, adjusting the pulp concentration to 1.5%, dehydrating with the dehydration rate of 75%, and briquetting to obtain a finished product.
In summary, in this embodiment, according to the clean pulping process of trace hydrolyzed straw in this embodiment, as can be seen from embodiments 1 to 5, the straw fiber slurry prepared in embodiment 4 is optimal, and meanwhile, the straw fiber slurry has uniform quality, no pollution is generated in the pulping process, and the finished product has high quality. The chemical industry is abandoned, the physical hydrolysis method is adopted to soften and separate the straw fiber, the cell wall of the straw fiber is expanded through high-temperature cooking, and the high-pressure, medium-pressure and low-temperature water is circularly injected under the condition that the cell wall is expanded through high-pressure, medium-pressure and low-temperature water, so that the circular cooking hydrolysis is carried out. After cellulose and hemicellulose are fully cured, the three cellulose in the straw can be preliminarily separated by high-pressure spiral conveying and friction conveying of pipeline salient points, then high-concentration disc grinding and medium-concentration disc grinding are carried out, and the cured straw fiber is divided and cut by the grinding, so that the straw is dehydrated into pulp.
The above description is only for the purpose of illustrating the present invention and is not intended to limit the scope of the present invention, and any person skilled in the art can substitute or change the technical solution of the present invention and its conception within the scope of the present invention.
Claims (9)
1. A trace hydrolyzed straw clean pulping process is characterized by comprising the following steps:
step 1: preparing materials by a dry method, namely feeding straws into a multi-roller automatic feeding device, and uniformly scattering loose straw bags;
step 2: conveying the scattered straws to a straw cutter through a belt for cutting, and putting the cut straws into a multi-roller dedusting and silk kneading machine for preliminary silk separation;
and step 3: conveying the primarily devillicated straws to a drum-type grass washing machine for cleaning and dedusting, automatically loading the cleaned straws into a multifunctional combined cooker through a fan-shaped feeder for cooking, and circularly cooking and hydrolyzing;
and 4, step 4: carrying out high-pressure spraying on the steamed straw fibers to a pressure spiral conveying pipe through the pressure spiral conveying pipe;
and 5: and storing the fiber slurry into a storage tank through a pressure spiral conveying pipe, adding water, storing and fermenting, sequentially and spirally conveying the slurry to a high-concentration disc mill and a medium-concentration disc mill after fermentation is finished, dewatering after the disc mill is finished, and briquetting to obtain a finished product.
2. The clean pulping process of trace hydrolyzed straw as claimed in claim 1, wherein in step 2, the straw is cut into straw sections of 2-15 cm by the straw cutter.
3. The clean pulping process of trace hydrolyzed straw as claimed in claim 1, wherein in step 3, the cooking temperature is 80-260 ℃, the cooking time is 3-5 periods, and the cooking time is 40-45 min.
4. The clean pulping process of trace hydrolyzed straw as claimed in claim 1, wherein the multi-roller dedusting and kneading machine preliminarily removes dust from straw, kneads the dedusted straw to separate fiber from straw, and realizes preliminary devillicate.
5. The clean pulping process of trace hydrolyzed straw as claimed in claim 4, wherein in step 5, the concentration of the pulp is adjusted to 15-18% before disc grinding.
6. The clean pulping process of trace hydrolyzed straw as claimed in claim 1, wherein the pressure screw conveying pipe is used for fiber splitting while conveying straw.
7. The clean pulping process of trace hydrolyzed straw as claimed in claim 1, wherein the multi-roller automatic feeding device, the multi-roller dedusting and kneading machine, the fan-shaped feeder, the multifunctional combined boiler, the pressure spiral conveying pipe and the conical spiral separator are conveyed by a belt conveyor.
8. The clean pulping process of trace hydrolyzed straw as claimed in claim 1, wherein in step 5, the dehydration rate of pulp dehydration is 60-75%.
9. The clean pulping process of trace hydrolyzed straw as claimed in claim 3, wherein the conditions of the circulating cooking hydrolysis are that the pressure of the storage tank is 1.5-7.5Kg, and the temperature of water is 10-100 ℃.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011304791.9A CN112458779A (en) | 2020-11-19 | 2020-11-19 | Clean pulping process for trace hydrolyzed straw |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011304791.9A CN112458779A (en) | 2020-11-19 | 2020-11-19 | Clean pulping process for trace hydrolyzed straw |
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| CN112458779A true CN112458779A (en) | 2021-03-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113502674A (en) * | 2021-06-18 | 2021-10-15 | 辽宁禾芯环保科技有限公司 | Straw fiber dissociation agent and dry method straw fiber manufacturing method |
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| CN103614942A (en) * | 2013-11-08 | 2014-03-05 | 尚诚德 | Pollution-free papermaking process utilizing crop straws |
| CN104141254A (en) * | 2014-07-09 | 2014-11-12 | 伍强 | Pollution-free papermaking and pulping method by utilizing waste straw |
| CN104631204A (en) * | 2015-01-27 | 2015-05-20 | 北京金梦地模塑科技开发有限公司 | Production process method for novel crop straw environment-friendly material |
| CN108517707A (en) * | 2018-04-12 | 2018-09-11 | 南京高新工大生物技术研究院有限公司 | A kind of method of continuous separation lignocellulosic component |
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2020
- 2020-11-19 CN CN202011304791.9A patent/CN112458779A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101718049A (en) * | 2009-10-30 | 2010-06-02 | 邹平县海华纸业有限公司 | Clean pulping process for straws by mechanical method |
| CN103614942A (en) * | 2013-11-08 | 2014-03-05 | 尚诚德 | Pollution-free papermaking process utilizing crop straws |
| CN104141254A (en) * | 2014-07-09 | 2014-11-12 | 伍强 | Pollution-free papermaking and pulping method by utilizing waste straw |
| CN104631204A (en) * | 2015-01-27 | 2015-05-20 | 北京金梦地模塑科技开发有限公司 | Production process method for novel crop straw environment-friendly material |
| CN108517707A (en) * | 2018-04-12 | 2018-09-11 | 南京高新工大生物技术研究院有限公司 | A kind of method of continuous separation lignocellulosic component |
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| CN113502674A (en) * | 2021-06-18 | 2021-10-15 | 辽宁禾芯环保科技有限公司 | Straw fiber dissociation agent and dry method straw fiber manufacturing method |
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