CN103074793B - Displacement cooking method - Google Patents
Displacement cooking method Download PDFInfo
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- CN103074793B CN103074793B CN201310023077.6A CN201310023077A CN103074793B CN 103074793 B CN103074793 B CN 103074793B CN 201310023077 A CN201310023077 A CN 201310023077A CN 103074793 B CN103074793 B CN 103074793B
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Abstract
The invention discloses a displacement cooking method. The displacement cooking method comprises the following steps: adding 0.1-2.0 % of complex cooking additive of fatty alcohol-polyoxyethylene ether and ammonium persulfate on the basis of adding the original cooking reagent in the displacement cooking stage of a hot black liquor; and then recycling the cooked hot black liquor for cooking. According to the invention, energy consumption is greatly reduced, the cooking yield is increased and the pulp forming quality is improved.
Description
Technical field
The present invention relates to a kind of displacement cooking method.
Background technology
In pulp and paper industry field, current China wood chip and bamboo wood boiling generally adopt vertical digester (being called for short vertical pot or digester) to carry out batch process boiling, namely in vertical pot, wood chip or bamboo chip is added, require to add the steaming preparations such as certain density caustic soda, vulcanized sodium in proportion according to digesting technoloy, under certain boiling temperature and pressure, carry out boiling.After boiling terminates, the slurry with very high-temperature is discharged into spraying pot together with black liquor.This method pulp quality is poor, and energy resource consumption is large.In recent years, some factories start adopt introduce displacement cooking technology, namely the hot black liquor after boiling again reuse to boiling, this technology considerably reduces energy resource consumption, and improves pulp quality.Generally digesting assistant is used, as anthraquinone, green oxygen etc., to improve boiling pulp quality in batch process boiling., in existing displacement cooking technology, digesting assistant is also rarely had to add the report of application.
Summary of the invention
The object of the present invention is to provide a kind of displacement cooking method, the method digester yield is high, pulp quality good, can improve the efficiency of displacement cooking.
For achieving the above object, present invention employs following technical scheme:
This displacement cooking method is in the hot black liquor displacement cooking stage, adding on original steaming preparation basis, the composite digesting assistant having fibrous raw material quality 0.1 ~ 2.0% is added in vertical pot, described composite digesting assistant comprises fatty alcohol-polyoxyethylene ether and ammonium persulfate, fatty alcohol-polyoxyethylene ether in composite digesting assistant: the mass ratio of ammonium persulfate is 3 ~ 7:1, makes digester yield, pulp quality improves further.
The concrete steps of described hot black liquor displacement cooking are: found the warm black liquor in pot with the hot black liquor displacement that temperature is 140 ~ 160 DEG C, then in vertical pot, add the effective alkali of fibrous raw material quality 9 ~ 17.5% and the composite digesting assistant of 0.1 ~ 2.0%, after being then warming up to 150 ~ 175 DEG C, be incubated 30 ~ 60 minutes.
Described displacement cooking method is further comprising the steps of: before the hot black liquor displacement cooking stage, fibrous raw material is loaded vertical pot, then in vertical pot, add temperature is the warm black liquor of 100 ~ 135 DEG C and the effective alkali of fibrous raw material quality 4 ~ 7.5%, is then incubated 30 ~ 50 minutes.
Described effective alkali is caustic soda.
Described displacement cooking method is further comprising the steps of: after the hot black liquor displacement cooking stage, with the hot black liquor in the vertical pot of pulp washing filtrate displacement, when vertical kettle temperature is down to below 100 DEG C, illustrates that displacement work completes.
Described fibrous raw material is wood chip or bamboo chip.
Described composite digesting assistant is the composite aqueous solution of fatty alcohol-polyoxyethylene ether and ammonium persulfate, and the mass fraction of the composite aqueous solution is 2 ~ 20%.
Described fatty alcohol-polyoxyethylene ether is any one in AEOn, and n is that 3 ~ 12, n is all effective between 3 ~ 12, and n is best between 6 ~ 8.
The present invention adds composite digesting assistant in the hot black liquor displacement stage of displacement cooking, pulp yield is become to improve 1 ~ 3%, reach 47 ~ 49%, Kappa number reduces by 15 ~ 35%, reaches 12 ~ 14, and whiteness improves 5 ~ 10%, reach 33 ~ 35%, the optimum transformation to traditional pulp and paper industry field decoction system can be realized, considerably reduce energy resource consumption, make digester yield, pulp quality improves further, thus improve boiling efficiency.
Detailed description of the invention
Below in conjunction with embodiment, the invention will be further described.
In this displacement cooking method, boiling alkali is provided by white liquid, and the total alkali charge of boiling is that 13% ~ 25%(of wood chip or bamboo chip quality is in sodium oxide molybdena), white liquid sulphidity 15% ~ 35%.
Embodiment 1
After wood chip or bamboo chip fill pot, pump into from vertical pot bottom the warm black liquor that temperature is 130 DEG C, add the caustic soda (in sodium oxide molybdena) of wood chip or bamboo chip quality 5% simultaneously, be incubated 35 minutes.Then, the warm black liquor in pot is found with the hot black liquor displacement that temperature is 155 DEG C, add the caustic soda of wood chip or bamboo chip quality 13% and the fatty alcohol-polyoxyethylene ether (AEO6) of wood chip or bamboo chip quality 0.6% and the composite aqueous solution of ammonium persulfate simultaneously, fatty alcohol-polyoxyethylene ether: the mass ratio of ammonium persulfate is 4:1, and composite aqueous solution mass fraction is 5%.Then, 45 minutes are incubated after being warming up to 165 DEG C.Then, with the hot black liquor in the vertical pot of pulp washing filtrate displacement, until temperature is down to less than 100 DEG C, boiling terminates.Relative to not adding digesting assistant (the composite aqueous solution of fatty alcohol-polyoxyethylene ether and ammonium persulfate), after boiling obtain paper pulp one-tenth pulp yield can improve 1 ~ 3%, Kappa number reduces by 15 ~ 35%, and whiteness improves 5 ~ 10%ISO.
Embodiment 2
After wood chip or bamboo chip fill pot, pump into from vertical pot bottom the warm black liquor that temperature is 100 DEG C, add the caustic soda (in sodium oxide molybdena) of wood chip or bamboo chip quality 7.5% simultaneously, be incubated 30 minutes.Then, the warm black liquor in pot is found with the hot black liquor displacement that temperature is 140 DEG C, add the caustic soda of wood chip or bamboo chip quality 9% and the fatty alcohol-polyoxyethylene ether (AEO7) of wood chip or bamboo chip quality 2.0% and the composite aqueous solution of ammonium persulfate simultaneously, fatty alcohol-polyoxyethylene ether: the mass ratio of ammonium persulfate is 3:1, and composite concentration of aqueous solution is 20%.Then, 60 minutes are incubated after being warming up to 150 DEG C.Then, with the hot black liquor in the vertical pot of pulp washing filtrate displacement, until temperature is down to less than 100 DEG C, boiling terminates.Relative to not adding digesting assistant (the composite aqueous solution of fatty alcohol-polyoxyethylene ether and ammonium persulfate), after boiling obtain paper pulp one-tenth pulp yield can improve 1 ~ 3%, Kappa number reduces by 15 ~ 35%, and whiteness improves 5 ~ 10%ISO.
Embodiment 3
After wood chip or bamboo chip fill pot, pump into from vertical pot bottom the warm black liquor that temperature is 135 DEG C, add the caustic soda (in sodium oxide molybdena) of wood chip or bamboo chip quality 4% simultaneously, be incubated 50 minutes.Then, the warm black liquor in pot is found with the hot black liquor displacement that temperature is 160 DEG C, add the caustic soda of wood chip or bamboo chip quality 17.5% and the fatty alcohol-polyoxyethylene ether (AEO8) of wood chip or bamboo chip quality 0.1% and the composite aqueous solution of ammonium persulfate simultaneously, fatty alcohol-polyoxyethylene ether: the mass ratio of ammonium persulfate is 7:1, and composite concentration of aqueous solution is 2%.Then, 30 minutes are incubated after being warming up to 175 DEG C.Then, with the hot black liquor in the vertical pot of pulp washing filtrate displacement, until temperature is down to less than 100 DEG C, boiling terminates.Relative to not adding digesting assistant (the composite aqueous solution of fatty alcohol-polyoxyethylene ether and ammonium persulfate), after boiling obtain paper pulp one-tenth pulp yield can improve 1 ~ 3%, Kappa number reduces by 15 ~ 35%, and whiteness improves 5 ~ 10%ISO.
Claims (5)
1. a displacement cooking method, it is characterized in that: this displacement cooking method is in the hot black liquor displacement cooking stage, the composite digesting assistant having fibrous raw material quality 0.1 ~ 2.0% is added in vertical pot, described composite digesting assistant comprises fatty alcohol-polyoxyethylene ether and ammonium persulfate, fatty alcohol-polyoxyethylene ether in composite digesting assistant: the mass ratio of ammonium persulfate is 3 ~ 7:1;
The concrete steps of described hot black liquor displacement cooking are: found the warm black liquor in pot with the hot black liquor displacement that temperature is 140 ~ 160 DEG C, then in vertical pot, add the effective alkali of fibrous raw material quality 9 ~ 17.5% and the composite digesting assistant of 0.1 ~ 2.0%, after being then warming up to 150 ~ 175 DEG C, be incubated 30 ~ 60 minutes;
Before the hot black liquor displacement cooking stage, fibrous raw material is loaded vertical pot, and in vertical pot, then add temperature is the warm black liquor of 100 ~ 135 DEG C and the effective alkali of fibrous raw material quality 4 ~ 7.5%, is then incubated 30 ~ 50 minutes;
Described fibrous raw material is wood chip or bamboo chip.
2. a kind of displacement cooking method according to claim 1, is characterized in that: described effective alkali is caustic soda.
3. a kind of displacement cooking method according to claim 1, is characterized in that: described displacement cooking method is further comprising the steps of: after the hot black liquor displacement cooking stage, with the hot black liquor in the vertical pot of pulp washing filtrate displacement.
4. a kind of displacement cooking method according to claim 1, it is characterized in that: described composite digesting assistant is the composite aqueous solution of fatty alcohol-polyoxyethylene ether and ammonium persulfate, the mass fraction of the composite aqueous solution is 2 ~ 20%.
5. a kind of displacement cooking method according to claim 1, is characterized in that: described fatty alcohol-polyoxyethylene ether is any one in AEOn, and n is 3 ~ 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310023077.6A CN103074793B (en) | 2013-01-22 | 2013-01-22 | Displacement cooking method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310023077.6A CN103074793B (en) | 2013-01-22 | 2013-01-22 | Displacement cooking method |
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| CN103074793A CN103074793A (en) | 2013-05-01 |
| CN103074793B true CN103074793B (en) | 2015-04-22 |
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| CN201310023077.6A Active CN103074793B (en) | 2013-01-22 | 2013-01-22 | Displacement cooking method |
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| CN108611896A (en) * | 2016-12-20 | 2018-10-02 | 丁永新 | Using paper grade (stock) slurry made of wood, bamboo raw material |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5744043A (en) * | 1994-11-21 | 1998-04-28 | Allied Colloids Limited | Processes for reducing contamination of cellulosic liquors |
| CN1361327A (en) * | 2000-12-27 | 2002-07-31 | 陈松涛 | Clean production process of making grass pulp |
| CN1603513A (en) * | 2004-11-16 | 2005-04-06 | 山东泉林纸业有限责任公司 | Rice and wheatgrass replacing and cooking process |
| CN101100820A (en) * | 2007-06-26 | 2008-01-09 | 永州湘江纸业有限责任公司 | Method for producing Chinese red pine chemical pulp |
| CN101294309A (en) * | 2008-05-26 | 2008-10-29 | 东华大学 | Process for producing sisal fiber |
| CN102433785A (en) * | 2011-11-11 | 2012-05-02 | 陕西科技大学 | Bamboo displacement cooking process |
-
2013
- 2013-01-22 CN CN201310023077.6A patent/CN103074793B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5744043A (en) * | 1994-11-21 | 1998-04-28 | Allied Colloids Limited | Processes for reducing contamination of cellulosic liquors |
| CN1361327A (en) * | 2000-12-27 | 2002-07-31 | 陈松涛 | Clean production process of making grass pulp |
| CN1603513A (en) * | 2004-11-16 | 2005-04-06 | 山东泉林纸业有限责任公司 | Rice and wheatgrass replacing and cooking process |
| CN101100820A (en) * | 2007-06-26 | 2008-01-09 | 永州湘江纸业有限责任公司 | Method for producing Chinese red pine chemical pulp |
| CN101294309A (en) * | 2008-05-26 | 2008-10-29 | 东华大学 | Process for producing sisal fiber |
| CN102433785A (en) * | 2011-11-11 | 2012-05-02 | 陕西科技大学 | Bamboo displacement cooking process |
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