CN107858847B - Device and process for preserving plant fiber original ecology cooking - Google Patents
Device and process for preserving plant fiber original ecology cooking Download PDFInfo
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- CN107858847B CN107858847B CN201711374769.XA CN201711374769A CN107858847B CN 107858847 B CN107858847 B CN 107858847B CN 201711374769 A CN201711374769 A CN 201711374769A CN 107858847 B CN107858847 B CN 107858847B
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- hot
- water tank
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- black liquor
- hot water
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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
- D21C7/00—Digesters
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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Abstract
The invention discloses a device for retaining plant fiber original ecology and a process thereof, wherein cold black liquor is added into a cooking pot to enable liquor and bamboo chips to fully permeate, so that the cooking delignification rate is accelerated; the pipeline of the heater and the hot water tank is provided with a thermometer and a heater outlet regulating valve, a circulating pump inlet valve is arranged between the hot water tank and the circulating pump, the other end pipeline of the heater is provided with a regulating valve, when the temperature reaches a preset value of the thermometer, the circulating pump inlet valve is closed, the circulating pump is stopped to supply hot water, and the degradation of components such as cellulose and the like is reduced; one end of the black liquor converter is connected with the digester through a pipeline, and three outlets are connected with the alkali liquor preheater, the hot black liquor tank and the warm water tank through pipelines, so that heat energy is recovered, and the cost is saved; the invention has the advantages of short reaction time, rapid and uniform reaction, low temperature, low steam consumption, simple process, convenient preparation, environment protection, low cost and high pulping rate, and protects cellulose and hemicellulose required by pulping of the bamboo plant raw materials to the maximum extent.
Description
Technical Field
The invention relates to the technical field of pulping and cooking devices, in particular to a device for retaining plant fiber original ecology and a process thereof.
Background
And can be widely applied in other fields. Paper is a necessity in national production and life. In the traditional concept, the whiter and the better the paper is, the whiteness of the sizing agent is improved through various technological methods. Along with the improvement of national living standard, environmental protection consciousness is continuously enhanced, the healthy living concept is greatly improved, the harm of bleached paper is known, and the knowledge of paper is greatly changed. Since only the whiteness of paper is paid attention to before, the original ecology of the plant fiber is not paid attention to. And in the prior art, the cooking process is mainly a delignification process. At the same time, some cellulose and hemicellulose are inevitably subject to some degree of degradation. In the traditional cooking process, white liquor and clear water are adopted for cooking, the color of the obtained paper pulp is yellow and bright, and the original ecological characteristics of part of plant fibers are maintained, but lignin, cellulose and hemicellulose and other components in the raw materials are subjected to certain chemical changes due to the actions of high-temperature cooking and high-concentration cooking liquor and are degraded and damaged to different degrees; and the traditional cooking consumes a large amount of steam and has long cooking time. The conventional energy-saving cooking is adopted, the steam consumption can be reduced by utilizing the heat energy of the black liquor, but the black liquor is replaced for multiple times to pollute the slurry, and the original ecological characteristics of plant fibers are destroyed.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a device and a process for preserving the original ecology of plant fibers.
The aim of the invention is achieved by the following technical scheme: the utility model provides a remain original ecology cooking device of plant fiber, includes digester, hot black liquor groove and hot alkali lye groove, the digester links to each other with the black liquor converter through the pipeline, and the black liquor converter is connected to warm water tank through export A, and warm water tank links to each other with the preheating pump, and the preheating pump passes through the pipeline to be connected to the hot water tank, and hot water tank and circulating pump between be provided with circulating pump inlet valve, the other end of circulating pump links to each other through pipeline and heater, heater and hot water tank link to each other, and be provided with thermometer and heater export governing valve between heater and the hot water tank, be provided with the governing valve on the heater, be provided with the level gauge on the hot water tank, one end of hot water tank links to each other with the digester;
the black liquor converter is connected with the alkali liquor preheater through an outlet B, one end of the alkali liquor preheater is connected with the hot alkali liquor tank, one end of the hot alkali liquor tank is connected with the digester, and a pressurizing pump I is arranged between the hot alkali liquor tank and the digester;
the hot black liquor converter is connected with the hot black liquor tank through an inlet, one end of the hot black liquor tank is connected with the digester, and a second pressurizing pump is arranged between the hot black liquor tank and the digester;
preferably, the duct is provided with a plurality of ducts.
Preferably, the digester is provided with four.
Preferably, the four cooking pans are arranged in parallel.
The process for retaining the original ecology of the plant fiber by the cooking device comprises the following steps:
s1, adding bamboo chips into a digester in advance, adding alkali liquor into an alkali liquor preheater, adding hot black liquor into a hot black liquor tank, adding cold water into a hot water tank, closing a first pressurizing pump, a second pressurizing pump, a circulating pump, a heater outlet regulating valve, a regulating valve and a circulating pump inlet valve, and adding cold black liquor to presoak the bamboo chips in the digester;
s2, starting a pressurizing pump II to add hot black liquor in the hot black liquor tank, and starting a pressurizing pump I to add hot alkali in the hot alkali tank to soak the bamboo chips at low temperature;
s3, conveying preheated warm water into a hot water tank through a preheating pump, closing the preheating pump, opening an inlet valve of a circulating pump and the circulating pump, forming a loop with a heater and the hot water tank by the circulating pump, heating the warm water by the heater in a circulating way until the temperature reaches a set temperature, conveying the heated hot water to the hot water tank, and finally closing an inlet valve of the circulating pump, wherein the hot water in the hot water tank is conveyed into a digester by the circulating pump;
s4, starting a pressurizing pump I, adding hot water in a hot water tank and hot alkali liquor in a hot alkali tank into a boiling pot by a circulating pump I to cook bamboo chips, and absorbing heat energy by a black liquor converter through a pipeline after the boiling is finished;
s5, the warm water preheated in S3 is heat energy absorbed by the black liquor converter from the hot black liquor tank, wherein a part of heat is conveyed to cool water in the warm water tank through an outlet A to be preheated into warm water, and a part of heat is conveyed to alkali liquor in the alkali liquor preheater through an outlet B to be preheated.
The invention has the technical advantages that: (1) Firstly, adding cold black liquor into a cooking pot to enable the liquor and bamboo chips to fully permeate, so that the cooking delignification rate is accelerated; the pipeline of the heater and the hot water tank is provided with a thermometer and a heater outlet regulating valve, a circulating pump inlet valve is arranged between the hot water tank and the circulating pump, the other end pipeline of the heater is provided with a regulating valve, when the temperature reaches a preset value of the thermometer, the circulating pump inlet valve is closed, the circulating pump is stopped to supply hot water, and the degradation of components such as cellulose and the like is reduced; one end of the black liquor converter is connected with the digester through a pipeline, and three outlets are connected with the alkali liquor preheater, the hot black liquor tank and the warm water tank through pipelines, so that heat energy is recovered, and the cost is saved; (2) The invention has the advantages of short reaction time, rapid and uniform reaction, low temperature, low steam consumption, simple process, convenient preparation, environment protection, low cost and high pulping rate, and protects cellulose and hemicellulose required by pulping of the bamboo plant raw materials to the maximum extent.
Drawings
FIG. 1 is a process flow diagram of the present invention;
in the figure: 1. a heater outlet regulator valve; 2. a thermometer; 3. a regulating valve; 4. a liquid level gauge; 5. an inlet valve of the circulation pump; 6. an outlet A; 7. an outlet B; 8. an inlet; 9. a pressurizing pump I; 10. and a second pressurizing pump.
Detailed Description
The present invention will be further described with reference to the accompanying drawings, but the scope of the present invention is not limited to the following.
As shown in fig. 1, the original ecological cooking device for retaining plant fibers comprises a cooking pot, a hot black liquor tank and a hot alkali liquor tank, wherein the cooking pot is connected with a black liquor converter through a pipeline, the black liquor converter is connected to a warm water tank through an outlet A6, the warm water tank is connected with a preheating pump, the preheating pump is connected to a hot water tank through a pipeline, the hot water tank is connected with a circulating pump through a pipeline, a circulating pump inlet valve 5 is arranged between the hot water tank and the circulating pump, the other end of the circulating pump is connected with a heater through a pipeline, the heater is connected with the hot water tank, a thermometer 2 and a heater outlet regulating valve 1 are arranged between the heater and the hot water tank, a regulating valve 3 is arranged on the heater, a liquid level meter 4 is arranged on the hot water tank, and one end of the hot water tank is connected with the cooking pot;
the black liquor converter is connected with the alkali liquor preheater through an outlet B7, one end of the alkali liquor preheater is connected with the hot alkali liquor tank, one end of the hot alkali liquor tank is connected with the digester, and a pressurizing pump I9 is arranged between the hot alkali liquor tank and the digester;
the hot black liquor converter is connected with the hot black liquor tank through the inlet 8, one end of the hot black liquor tank is connected with the digester, and a second pressurizing pump 10 is arranged between the hot black liquor tank and the digester.
The pipeline is provided with a plurality of pipelines.
The digester is provided with four.
The four boiling pans are arranged in parallel.
The process for retaining the original ecology of the plant fiber by the cooking device comprises the following steps:
s1, adding bamboo chips into a digester in advance, adding alkali liquor into an alkali liquor preheater, adding hot black liquor into a hot black liquor tank, adding cold water into a warm water tank, closing a first pressurizing pump 9, a second pressurizing pump 10, a circulating pump and heater outlet regulating valve 1, a regulating valve 3 and a circulating pump inlet valve 5, and adding cold black liquor to presoak the bamboo chips in the digester;
s2, simultaneously, starting a second pressurizing pump 10 to add hot black liquor in the hot black liquor tank and starting a first pressurizing pump 9 to add hot alkali in the hot alkali tank to soak the bamboo chips at low temperature;
s3, conveying preheated warm water into a hot water tank through a preheating pump, closing the preheating pump, opening a circulating pump inlet valve 5 and a circulating pump, forming a loop with a heater and the hot water tank by the circulating pump, heating the warm water by the heater in a circulating way until the temperature reaches a set temperature, conveying the heated hot water to the hot water tank, and finally closing the circulating pump inlet valve 5, and conveying the hot water in the hot water tank into a boiling pot by the circulating pump;
s4, starting a pressurizing pump I9, adding hot water in a hot water tank and hot alkali liquor in a hot alkali tank into a boiling pot by a circulating pump I9 to cook bamboo chips, and absorbing heat energy by a black liquor converter through a pipeline after the boiling is finished;
s5, the warm water preheated in S3 is heat energy absorbed by the black liquor converter from the hot black liquor tank, wherein a part of heat is conveyed to cool water in the warm water tank through an outlet A6 to be preheated into warm water, and a part of heat is conveyed to alkali liquor in the alkali liquor preheater through an outlet B7 to be preheated.
The working process of the invention is as follows: adding bamboo chips into a digester, adding cold black liquor into the digester through a pipeline for presoaking, adding hot black liquor in a hot black liquor tank and hot alkali in a hot alkali tank for low-temperature soaking after presoaking, and finally adding hot water preheated by a black liquor converter and then heated by a heater and hot alkali in the hot alkali tank through a pipeline for heating and cooking. After the boiling is finished, the black liquor heat exchanger recovers heat energy through the inlet 8, the heat energy is used for preheating the alkali liquor and the warm water in the warm water tank, cold water in the warm water tank is conveyed into the hot water tank through the preheating pump after being preheated, the inlet valve of the circulating pump and the circulating pump are started, the circulating pump repeatedly conveys the hot water in the hot water tank to the heater to heat the hot water to a specified temperature, and the heated hot water enters the hot water tank through the pipeline and is added into the boiling pot; firstly, adding cold black liquor into a cooking pot to enable the liquor and bamboo chips to fully permeate, so that the cooking delignification rate is accelerated; the pipeline of the heater and the hot water tank is provided with a thermometer and a heater outlet regulating valve, a circulating pump inlet valve is arranged between the hot water tank and the circulating pump, the other end pipeline of the heater is provided with a regulating valve, when the temperature reaches a preset value of the thermometer, the circulating pump inlet valve is closed, the circulating pump is stopped to supply hot water, and the degradation of components such as cellulose and the like is reduced; one end of the black liquor converter is connected with the digester through a pipeline, and three outlets are connected with the alkali liquor preheater, the hot black liquor tank and the warm water tank through pipelines, so that heat energy is recovered, and the cost is saved.
Claims (2)
1. A device for cooking plant fiber in a original ecology state, which is characterized in that: the black liquor converter is connected to a warm water tank through an outlet A (6), the warm water tank is connected with a preheating pump through a pipeline, the preheating pump is connected to a hot water tank through a pipeline, the hot water tank is connected with a circulating pump through a pipeline, a circulating pump inlet valve (5) is arranged between the hot water tank and the circulating pump, the other end of the circulating pump is connected with a heater through a pipeline, the heater is connected with the hot water tank, a thermometer (2) and a heater outlet regulating valve (1) are arranged between the heater and the hot water tank, a regulating valve (3) is arranged on the heater, a liquid level meter (4) is arranged on the hot water tank, and one end of the hot water tank is connected with the digester;
the black liquor converter is connected with the alkali liquor preheater through an outlet B (7), one end of the alkali liquor preheater is connected with the hot alkali liquor tank, one end of the hot alkali liquor tank is connected with the digester, and a pressurizing pump I (9) is arranged between the hot alkali liquor tank and the digester;
the black liquor converter is connected with a hot black liquor tank through an inlet (8), one end of the hot black liquor tank is connected with a digester, and a second pressurizing pump (10) is arranged between the hot black liquor tank and the digester;
the four cooking pots are arranged in parallel.
2. The process for preserving plant fiber ecology of a cooking apparatus of claim 1 wherein: it comprises the following steps:
s1, adding bamboo chips into a digester in advance, adding alkali liquor into an alkali liquor preheater, adding hot black liquor into a hot black liquor tank, adding cold water into a warm water tank, closing a first pressurizing pump (9), a second pressurizing pump (10), a circulating pump, a heater outlet regulating valve (1), a regulating valve (3) and a circulating pump inlet valve (5), and adding cold black liquor to presoak the bamboo chips in the digester;
s2, starting a pressurizing pump II (10) to add hot black liquor in the hot black liquor tank and starting a pressurizing pump I (9) to add hot alkali in the hot alkali tank to soak the bamboo chips at low temperature;
s3, conveying preheated warm water into a hot water tank through a preheating pump, closing the preheating pump, opening a circulating pump inlet valve (5) and a circulating pump, forming a loop with a heater and the hot water tank by the circulating pump, heating the warm water by the heater in a circulating way until the temperature reaches a set temperature, conveying the heated hot water to the hot water tank, and finally closing the circulating pump inlet valve (5), and conveying the hot water in the hot water tank into a cooking pot;
s4, adding hot water in the hot water tank and hot alkali liquor in the hot alkali tank into a cooking pot to cook the bamboo chips by starting a pressurizing pump I (9), and absorbing heat energy by a black liquor converter through a pipeline after the cooking is finished;
s5, the warm water preheated in the S3 absorbs heat energy from the hot black liquor tank by the black liquor converter, wherein a part of heat is conveyed to the cold water in the warm water tank through the outlet A (6) to be preheated into warm water, and a part of heat is conveyed to the alkali liquor in the alkali liquor preheater through the outlet B (7) to be preheated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711374769.XA CN107858847B (en) | 2017-12-19 | 2017-12-19 | Device and process for preserving plant fiber original ecology cooking |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711374769.XA CN107858847B (en) | 2017-12-19 | 2017-12-19 | Device and process for preserving plant fiber original ecology cooking |
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| Publication Number | Publication Date |
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| CN107858847A CN107858847A (en) | 2018-03-30 |
| CN107858847B true CN107858847B (en) | 2023-08-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711374769.XA Active CN107858847B (en) | 2017-12-19 | 2017-12-19 | Device and process for preserving plant fiber original ecology cooking |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108867133A (en) * | 2018-06-28 | 2018-11-23 | 谢章春 | A kind of broken bamboo digesting apparatus that cooking liquor recycles |
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| CN103352385A (en) * | 2013-06-28 | 2013-10-16 | 汶瑞机械(山东)有限公司 | Energy-saving and environment-friendly displacement cooking process for wood and bamboo raw materials |
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| CN106400568A (en) * | 2016-12-20 | 2017-02-15 | 墨宝股份有限公司 | Energy-saving environment-friendly displacement digestion process of wood and bamboo raw materials |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060231222A1 (en) * | 2005-04-19 | 2006-10-19 | Bianchini Craig A | Method and apparatus to decrease steam consumption in conventional batch digesters |
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2017
- 2017-12-19 CN CN201711374769.XA patent/CN107858847B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5093773A (en) * | 1989-10-12 | 1992-03-03 | Fisher Controls International, Inc. | Processing system with heat recovery |
| CN102226319A (en) * | 2011-06-03 | 2011-10-26 | 长沙理工大学 | Batch cooking cold blow device and cold blow method |
| CN202181476U (en) * | 2011-07-28 | 2012-04-04 | 曲传武 | Stewing circulating system |
| CN102517948A (en) * | 2011-12-29 | 2012-06-27 | 永州湘江纸业有限责任公司 | Method for pulping by mixing and boiling various fiber raw materials |
| CN103147332A (en) * | 2013-03-11 | 2013-06-12 | 杨安庆 | Tri-displacement cooking method |
| CN103352385A (en) * | 2013-06-28 | 2013-10-16 | 汶瑞机械(山东)有限公司 | Energy-saving and environment-friendly displacement cooking process for wood and bamboo raw materials |
| CN104452389A (en) * | 2014-11-04 | 2015-03-25 | 中国轻工业南宁设计工程有限公司 | Energy-saving pulping cooking sequence interlock control system |
| CN106192510A (en) * | 2015-05-08 | 2016-12-07 | 天津市恒脉机电科技有限公司 | A kind of phragmites communis starting pulps interval displacement cooking production system and method |
| CN106400568A (en) * | 2016-12-20 | 2017-02-15 | 墨宝股份有限公司 | Energy-saving environment-friendly displacement digestion process of wood and bamboo raw materials |
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Address after: 622650 Mianyang City, Sichuan province county Ju River town Applicant after: Sichuan Huanlong daily necessities Co.,Ltd. Address before: 622650 Mianyang City, Sichuan province county Ju River town Applicant before: AN COUNTY PAPER Co.,Ltd. |
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