CN1566520A - Pulping process by acid catalyzed ethanol method - Google Patents
Pulping process by acid catalyzed ethanol method Download PDFInfo
- Publication number
- CN1566520A CN1566520A CN 03134346 CN03134346A CN1566520A CN 1566520 A CN1566520 A CN 1566520A CN 03134346 CN03134346 CN 03134346 CN 03134346 A CN03134346 A CN 03134346A CN 1566520 A CN1566520 A CN 1566520A
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- China
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- ethanol
- pulping
- digester
- raffinate
- cooking liquor
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Abstract
The invention relates to a paper making and pulping technology by an acid catalysis alcohol method, which includes: taking acid as the catalyst, which can not only improve the boiling efficiency, but also slow the separation of the monox from the fiber material, so the silicon interference problem in pulping residue treatment is alleviated; adopting isothermal counterflow boiler thermal displacement washing technology, which improves the pulp washing efficiency and heat energy of the pulping residue; converting the heat energy of the pulping residue to electric energy by using turbomachine and dynamo, which improves selfsufficiency rate of power.
Description
One, affiliated technical field
The present invention relates to a kind of Ethanol Method paper-making pulping process, relate in particular to a kind of acid catalyzed ethanol pulping technology.Belong to the pulping technology for paper-making field.
Two, background technology
The ethanol pulping technology is considered to one of clean paper making pulping technique of potentialization.Yet when using base catalyst or self-catalysis, the pH value of cooking liquor is higher, can not effectively stop the stripping of institute's silicon oxide-containing in the fibrous raw material, causes having the silicon interference problem in the subsequent treatment of pulping and digesting raffinate; In addition, the cooling washing technology of boiling disposed slurry has reduced the heat energy grade of slurrying raffinate, is unfavorable for the raising of slurrying energy service efficiency.
Three, summary of the invention
In order to solve the silicon interference problem that exists in the ethanol pulping boiling raffinate processing procedure, further improve slurrying energy service efficiency, the invention provides the acid catalyzed ethanol pulping technology of a cover, this technology not only can shorten ethanol pulping boiling and slurry washing time, the heat energy that also available slurrying raffinate is contained is produced the very high electric energy of energy grade, improves the electric power degree of self-sufficiency of slurrying enterprise.Therefore the present invention can effectively improve the ethanol pulping economic benefit of enterprises.
The technical solution adopted for the present invention to solve the technical problems mainly comprises the plurality of processes of utilizing of boiling, washing and slurrying raffinate.(a) fibrous raw material that will handle through getting the raw materials ready of boiling is packed in the boiling vessel, and with after cleaning solution and part acetate, ethanol mix for the first time, by fibrous raw material: the liquor ratio of liquid=1: 7～11 (kg/l) pumps in the digester as cooking liquor, and the addition of ethanol is an ethanol in the cooking liquor: water=45～55% (percent by volume); Then, to the liquid forced circulation in the digester, liquid is heated rapidly simultaneously, improve temperature to 175～200 ℃ in the digester by heater by circulating pump, insulation a period of time, the lignin in the raw material is fully dissolved, obtain paper pulp.(b) the washing general cleaning solution second time pumps in the digester, and the boiling raffinate in the digester is replaced to reclaiming in the liquid storage tank; Pump into secondary washing liquid in the digester and be called once washing liquid after to the paper pulp displacement washing; With the temperature of newly preparing in three cleaning solution storage tanks is that 175～200 ℃ of ethanol waters pump in the digester, and the cleaning solution in the digester is displaced, and is stored in the once washing liquid storage tank; At this moment, the liquid that pumps in the digester is called secondary washing liquid; At last, feed water vapour, the cleaning solution in the digester is replaced to the secondary washing liquid storage tank.After cleaning solution is no longer discharged, close cleaning solution and import and export, with steam-jet vacuum pump slurry is carried and being heated up in a steamer, reclaim the ethanol in the paper pulp.Steam and ethanol mist are used for directly heating the ethanol water of three cleaning solution storage tanks; After ethanol reclaimed, paper pulp was discharged in boiling vessel.(c) utilization of the slurrying raffinate slurrying raffinate that will reclaim in the liquid storage tank is sent into the hydraulic turbine machine by choke valve and pipeline, and drives turbine and produce mechanical energy, and this mechanical energy is converted into electric energy through generator again; Low-energy liquid is collected standby.
The invention has the beneficial effects as follows: improve the ethanol pulping boiling efficiency, the preceding washing of floating of paper pulp is finished in digester, and shortened the pulp washing time, also can realize the comprehensive utilization of ethanol pulping energy, energy consumes low; Simplify technical process and equipment, reduced the slurrying production cost, thereby had good social benefit and economic benefit.
Four, specific embodiment
(a) fibrous raw material that will handle through getting the raw materials ready of boiling is packed in the boiling vessel, and with after cleaning solution and part ethanol mix for the first time, by fibrous raw material: the liquor ratio of liquid=1: 7～11 (kg/l) pumps in the digester as cooking liquor, the addition of ethanol is an ethanol in the pot inner cooking liquid: water=45～55% (percent by volume), and again by acetate: the liquor ratio of fibrous raw material=1～10% (mass percent) adds acetate and does catalyst usefulness; Then, to the liquid forced circulation in the digester, and the temperature in the digester is increased to 175～200 ℃ by circulating pump, insulation 30～120min obtains paper pulp after lignin in the raw material is fully dissolved.(b) the washing general cleaning solution second time pumps in the digester, and the boiling raffinate in the digester is replaced to reclaiming in the liquid storage tank; Pump into secondary washing liquid in the digester and be called once washing liquid after to the paper pulp displacement washing; With the temperature of new preparation in three cleaning solution storage tanks is that 175～200 ℃, concentration are that 45～55% ethanol water pumps in the digester, and the once washing liquid in the digester is displaced, and is stored in the once washing liquid storage tank; Pump into liquid in the digester and be called secondary washing liquid after to pulp washing; At last, feed water vapour, the cleaning solution in the digester is replaced to the secondary washing liquid storage tank.After cleaning solution is no longer discharged, close cleaning solution and import and export, carry with steam-jet vacuum pump (specified vacuum is less than 5Kpa) and heat up in a steamer and reclaim ethanol in the paper pulp.Steam and ethanol mist are used for directly heating the ethanol water of three cleaning solution storage tanks; After reclaiming ethanol, paper pulp is discharged in boiling vessel.(c) utilization of slurrying raffinate will be reclaimed slurrying raffinate (175～200 ℃ of the temperature in the liquid storage tank, pressure 1.6～2.5Mpa) is sent into the hydraulic turbine machine by choke valve and pipeline, and drive turbine and produce mechanical energy, this mechanical energy is converted into electric energy through generator again.Fluid flow by turbine is suitable can keep turbine to operate as continuously in pulping process.It is standby that the raffinate of process energy recovery enters fluid reservoir.
Claims (2)
1, the acid catalyzed ethanol pulping technology of a kind of usefulness.The fibrous raw material that to handle through getting the raw materials ready is packed in the digester, adds cooking liquor again in pot, and a liquor ratio is 1: 7～11 (mass volume ratios) in the pot, makes kettle temperature be increased to 175～200 ℃ by heater, and is incubated 30～120min.The preparation feature of its cooking liquor is: give to add ethanol and acetate formation cooking liquor in the once washing liquid, after the addition of acetate and ethanol should be able to guarantee that cooking liquor adds in the pot, the volume ratio of ethanol and water is 45～55% in the interior liquid of digester, and the mass ratio of acetate and fibrous raw material is 1～10%.
2, according to the acid catalyzed ethanol pulping technology of the described usefulness of claim 1, after finishing the pulping and digesting operation, in digester, carry out isothermal adverse current displacement washing three times with 45～55% ethanol waters (volume ratio), it is characterized in that: a displacement washing is the equal-volume displacement washing, gained pulping and digesting raffinate temperature is 175～200 ℃, pressure is 1.60～2.5Mpa, and it is stored in the storage tank; (temperature is 175～200 ℃, and pressure is 1.60～2.5Mpa) to send in the turbine, drives turbine and drives generator by it, and the thermal power transfer that contained of slurrying raffinate is an electric energy the most at last with the boiling raffinate by pipeline and choke valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03134346 CN1566520A (en) | 2003-07-03 | 2003-07-03 | Pulping process by acid catalyzed ethanol method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03134346 CN1566520A (en) | 2003-07-03 | 2003-07-03 | Pulping process by acid catalyzed ethanol method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1566520A true CN1566520A (en) | 2005-01-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03134346 Pending CN1566520A (en) | 2003-07-03 | 2003-07-03 | Pulping process by acid catalyzed ethanol method |
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| CN (1) | CN1566520A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101148830B (en) * | 2006-09-19 | 2011-07-27 | 中国科学院过程工程研究所 | Method for separating straw components by carrying steam explosion-microwave coupling treatment to plant straw |
| CN102277760A (en) * | 2011-08-30 | 2011-12-14 | 内蒙古科技大学 | Pre-processing method in process of producing paper pulp |
| CN102704298A (en) * | 2012-04-28 | 2012-10-03 | 大连工业大学 | Process and device for pulping by reversely extracting grass raw materials |
| CN102733223A (en) * | 2012-06-18 | 2012-10-17 | 中国科学院广州能源研究所 | Pulping method by catalysis of low boiling point solvent with diluted acid generated from xylose residue and furfural residue |
| CN109680532A (en) * | 2019-01-20 | 2019-04-26 | 王忠良 | A kind of vinasse ethyl alcohol organic solvent pulping by cooking method |
| CN114687247A (en) * | 2022-03-16 | 2022-07-01 | 湖南艾华集团股份有限公司 | Electrolytic paper for low-temperature aluminum electrolytic capacitor and preparation method thereof |
-
2003
- 2003-07-03 CN CN 03134346 patent/CN1566520A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101148830B (en) * | 2006-09-19 | 2011-07-27 | 中国科学院过程工程研究所 | Method for separating straw components by carrying steam explosion-microwave coupling treatment to plant straw |
| CN102277760A (en) * | 2011-08-30 | 2011-12-14 | 内蒙古科技大学 | Pre-processing method in process of producing paper pulp |
| CN102277760B (en) * | 2011-08-30 | 2014-05-14 | 内蒙古科技大学 | Pre-processing method in process of producing paper pulp |
| CN102704298A (en) * | 2012-04-28 | 2012-10-03 | 大连工业大学 | Process and device for pulping by reversely extracting grass raw materials |
| CN102704298B (en) * | 2012-04-28 | 2014-12-31 | 大连工业大学 | Process and device for pulping by reversely extracting grass raw materials |
| CN102733223A (en) * | 2012-06-18 | 2012-10-17 | 中国科学院广州能源研究所 | Pulping method by catalysis of low boiling point solvent with diluted acid generated from xylose residue and furfural residue |
| CN102733223B (en) * | 2012-06-18 | 2015-03-18 | 中国科学院广州能源研究所 | Pulping method by catalysis of low boiling point solvent with diluted acid generated from xylose residue and furfural residue |
| CN109680532A (en) * | 2019-01-20 | 2019-04-26 | 王忠良 | A kind of vinasse ethyl alcohol organic solvent pulping by cooking method |
| CN109680532B (en) * | 2019-01-20 | 2021-12-10 | 王忠良 | Method for cooking and pulping vinasse ethanol by organic solvent |
| CN114687247A (en) * | 2022-03-16 | 2022-07-01 | 湖南艾华集团股份有限公司 | Electrolytic paper for low-temperature aluminum electrolytic capacitor and preparation method thereof |
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