CN104151273B - Device and the technique of furfural is extracted from paper waste - Google Patents
Device and the technique of furfural is extracted from paper waste Download PDFInfo
- Publication number
- CN104151273B CN104151273B CN201410409273.1A CN201410409273A CN104151273B CN 104151273 B CN104151273 B CN 104151273B CN 201410409273 A CN201410409273 A CN 201410409273A CN 104151273 B CN104151273 B CN 104151273B
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- China
- Prior art keywords
- tower
- furfural
- paper waste
- reaction pot
- hydrolytic reaction
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D307/00—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom
- C07D307/02—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings
- C07D307/34—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members
- C07D307/38—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members with substituted hydrocarbon radicals attached to ring carbon atoms
- C07D307/40—Radicals substituted by oxygen atoms
- C07D307/46—Doubly bound oxygen atoms, or two oxygen atoms singly bound to the same carbon atom
- C07D307/48—Furfural
Abstract
Device and the technique of furfural is extracted from paper waste, primarily of primary tower, dehydration tower and treating tower composition, before primary tower, pretreatment unit is set, pretreatment unit comprises removal of impurities tower, thickener, hydrolytic reaction pot and original fluid container, the tower reactor of removal of impurities tower is connected with thickener, thickener is connected with hydrolytic reaction pot, hydrolytic reaction pot top is connected with original fluid container by condenser, original fluid container is connected in the middle part of primary tower by pipeline, primary tower overhead condenser is connected with a phase splitter, phase splitter is connected with dehydration tower with primary tower respectively, dehydration tower tower reactor is connected with treating tower by pipeline.The present invention by arranging pretreatment unit before primary tower, to be unfavorable in paper waste that xylose is the material removing of furfural, thus by the xylose furfural in papermaking wastewater, both can extract the furfural product that economic worth is high, and wastewater treatment expense can have been reduced again.
Description
Technical field
The present invention relates to furfural production and pulping wastewater treatment technical field, be specifically related to a kind of from paper waste, extract furfural device and technique.
Background technology
Paper industry producer of current China, the waste liquid major part of new generation does not make full use of, especially be the paper mill of raw material with timber, it is higher that it discharges waste liquid Xylose Content, be approximately 5 ~ 8%, its waste liquid is bad process also, serious environment pollution, processing costs is invested higher when processing, for Shandong Sun Paper Group, produce waste water about more than 1,600 ton every day, wherein Xylose Content is 5 ~ 8%, as being processed into furfural, 56 tons, furfural can be obtained every day, 18480 tons, furfural can be produced every year, by price per ton 0.9 ten thousand yuan, 1.66 hundred million yuan can be increased income every year, the waste water ratio extracted after furfural better processes, save wastewater treatment expense.
Summary of the invention
The invention provides a kind of from paper waste, extract furfural device and technique, to solve the problem of the bad process contaminate environment of paper waste that prior art exists.
Apparatus of the present invention are primarily of primary tower, dehydration tower and treating tower composition, solving the technical scheme that its technical problem adopts is arrange pretreatment unit before primary tower, pretreatment unit comprises removal of impurities tower, thickener, hydrolytic reaction pot and original fluid container, the tower reactor of removal of impurities tower is connected with thickener, thickener is connected with hydrolytic reaction pot, hydrolytic reaction pot top is connected with original fluid container by condenser, original fluid container is connected in the middle part of primary tower by pipeline, primary tower overhead condenser is connected with a phase splitter, phase splitter is connected with dehydration tower with primary tower respectively, dehydration tower tower reactor is connected with treating tower by pipeline.
Above-mentioned phase splitter be connected a neutralization tank between dehydration tower.
The technique extracting furfural from paper waste of the present invention is: extract from paper waste in the device of furfural above-mentioned, paper waste is carried out pre-treatment, to be unfavorable in paper waste that xylose is the material removing of furfural, the paper waste of removing impurity carry out concentrated after deliver to acid adding in hydrolytic reaction pot, wherein wood sugar of heating is sloughed three water and is converted into furfural, draw furfural steam through the laggard primary tower distillation of condenser condenses, layering in phase splitter is gone in overhead vapours condensation 40 DEG C, water aldehyde returns primary tower, aldehyde layer adds in alkali and rear dehydration, refining generation finished product furfural, concrete technology step is as follows:
(1) paper waste is got in removal of impurity tower, remove methyl alcohol, acetone and light constituent that unfavorable xylose in waste water is furfural;
(2) make to send into hydrolytic reaction pot after wood sugar mass concentration reaches 16.92% in waste liquid by carrying out concentrating in the paper waste after the removal of impurity early thickener;
(3) waste water after concentrated is squeezed into hydrolytic reaction pot and add acetic acid simultaneously, acetic acid consumption is 4.5% of wastewater quality;
(4) open steam and carry out increasing temperature and pressure to the waste water of hydrolytic reaction pot, control temperature of reaction at 180 DEG C, controlling the reaction times is 375 minutes;
(5) when material reaction in hydrolytic reaction pot is after 1 hour, open out aldehyde valve, drawn by aldehyde steam and obtain stoste through condensing cooling, hydrolytic reaction pot keeps 180 DEG C;
(6) stoste is entered after primary tower distills, and steam send phase-splitting in phase splitter through condenser condenses to 40 DEG C;
(7) water aldehyde passes back into tower, aldehyde enter mutually in neutralization tank through to add in alkali and after send dehydration tower to dewater;
(8) aldehyde that dewaters send treating column to carry out refining obtaining finished product furfural.
The present invention by arranging pretreatment unit before primary tower, to be unfavorable in paper waste that xylose is the material removing of furfural, thus by the xylose furfural in papermaking wastewater, (in waste water, Xylose Content is 7% to each 1,600 tons of waste water, furfural 5% can be carried) 56 tons of furfurals can be extracted, calculated by 1 year and can extract 18480 tons, furfural, by 0.9 ten thousand yuan of calculating per ton, can increase income into 1.66 hundred million yuan every year, the waste water of new generation can extract acetic acid or produce sodium-acetate administers waste water again, reduces wastewater treatment expense.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is the structural representation of apparatus of the present invention.
1 removal of impurities tower, 2 thickeners, 3 hydrolytic reaction pots, 4 condensers, 5 original fluid containers, 6 primary towers, 7 phase splitters, 8 neutralization tanks, 9 dehydration towers, 10 treating towers in figure.
Embodiment
As shown in the figure, a kind of device extracting furfural from paper waste, primarily of primary tower 6, dehydration tower 9 and treating tower 10 form, before primary tower 6, pretreatment unit is set, pretreatment unit comprises removal of impurities tower 1, thickener 2, hydrolytic reaction pot 3 and original fluid container 5, the tower reactor of removal of impurities tower 1 is connected with thickener 2, thickener 2 is connected with hydrolytic reaction pot 3, hydrolytic reaction pot 3 top is connected with original fluid container 5 by condenser 4, original fluid container 5 is connected in the middle part of primary tower 6 by pipeline, primary tower 6 overhead condenser is connected with a phase splitter 7, phase splitter 7 is connected with dehydration tower 9 with primary tower 6 respectively, a neutralization tank 8 is connected between phase splitter 7 with dehydration tower 9, dehydration tower 9 tower reactor is connected with treating tower 10 by pipeline.
The technique extracting furfural from paper waste of the present invention is: extract from paper waste in the device of furfural above-mentioned, paper waste is carried out pre-treatment, to be unfavorable in paper waste that xylose is the material removing of furfural, the paper waste of removing impurity carry out concentrated after deliver to acid adding in hydrolytic reaction pot, wherein wood sugar of heating is sloughed three water and is converted into furfural, draw furfural steam through the laggard primary tower distillation of condenser condenses, layering in phase splitter is gone in overhead vapours condensation 40 DEG C, water aldehyde returns primary tower, aldehyde layer adds in alkali and rear dehydration, refining generation finished product furfural, concrete technology step is as follows:
(1) paper waste is got in removal of impurity tower 1, remove methyl alcohol, acetone and light constituent that unfavorable xylose in waste water is furfural;
(2) paper waste after the removal of impurity is carried out in thickener 2 concentrated make wood sugar mass concentration in waste liquid reach 16.92% after send into hydrolytic reaction pot 3;
(3) waste water after concentrated is squeezed into hydrolytic reaction pot 3 and add acetic acid simultaneously, acetic acid consumption is 4.5% of wastewater quality;
(4) open steam and carry out increasing temperature and pressure to the waste water of hydrolytic reaction pot 3, control temperature of reaction at 180 DEG C, controlling the reaction times is 375 minutes;
(5) when material reaction in hydrolytic reaction pot 3 is after 1 hour, open out aldehyde valve, drawn by aldehyde steam and obtain stoste through condensing cooling, hydrolytic reaction pot 3 keeps 180 DEG C;
(6) stoste is entered after primary tower 6 distills, and steam send phase-splitting in phase splitter 7 through condenser condenses to 40 DEG C;
(7) water aldehyde passes back into tower, aldehyde enter mutually in neutralization tank 8 through to add in alkali and after send dehydration tower 9 to dewater;
(8) aldehyde that dewaters send treating column 10 to refine, and obtains finished product furfural from tower top.
Claims (3)
1. one kind is extracted the device of furfural from paper waste, primarily of primary tower, dehydration tower and treating tower composition, it is characterized in that arranging pretreatment unit before primary tower, pretreatment unit comprises removal of impurities tower, thickener, hydrolytic reaction pot and original fluid container, the tower reactor of removal of impurities tower is connected with thickener, thickener is connected with hydrolytic reaction pot, hydrolytic reaction pot top is connected with original fluid container by condenser, original fluid container is connected in the middle part of primary tower by pipeline, primary tower overhead condenser is connected with a phase splitter, phase splitter is connected with dehydration tower with primary tower respectively, dehydration tower tower reactor is connected with treating tower by pipeline.
2. the device extracting furfural from paper waste according to claim 1, is characterized in that being connected a neutralization tank between phase splitter with dehydration tower.
3. one kind is extracted the technique of furfural from paper waste, it is characterized in that extracting from paper waste in the device of furfural according to claim 2, paper waste is carried out pre-treatment, to be unfavorable in paper waste that xylose is the material removing of furfural, the paper waste of removing impurity carry out concentrated after deliver to acid adding in hydrolytic reaction pot, wherein wood sugar of heating is sloughed three water and is converted into furfural, draw furfural steam through the laggard primary tower distillation of condenser condenses, layering in phase splitter is gone in overhead vapours condensation 40 DEG C, water aldehyde returns primary tower, aldehyde layer adds in alkali and rear dehydration, refining generation finished product furfural, concrete technology step is as follows:
(1) paper waste is got in removal of impurity tower, remove methyl alcohol, acetone and light constituent that unfavorable xylose in waste water is furfural;
(2) paper waste after the removal of impurity is carried out in thickener concentrated make to send into hydrolytic reaction pot after wood sugar mass concentration reaches 16.92% in waste liquid;
(3) waste water after concentrated is squeezed into hydrolytic reaction pot and add acetic acid simultaneously, acetic acid consumption is 4.5% of wastewater quality;
(4) open steam and carry out increasing temperature and pressure to the waste water of hydrolytic reaction pot, control temperature of reaction at 180 DEG C, controlling the reaction times is 375 minutes;
(5) when material reaction in hydrolytic reaction pot is after 1 hour, open out aldehyde valve, drawn by aldehyde steam and obtain stoste through condensing cooling, hydrolytic reaction pot keeps 180 DEG C;
(6) stoste is entered after primary tower distills, and steam send phase-splitting in phase splitter through condenser condenses to 40 DEG C;
(7) water aldehyde passes back into tower, aldehyde enter mutually in neutralization tank through to add in alkali and after send dehydration tower to dewater;
(8) aldehyde that dewaters send treating tower to carry out refining obtaining finished product furfural.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410409273.1A CN104151273B (en) | 2014-08-19 | 2014-08-19 | Device and the technique of furfural is extracted from paper waste |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410409273.1A CN104151273B (en) | 2014-08-19 | 2014-08-19 | Device and the technique of furfural is extracted from paper waste |
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| Publication Number | Publication Date |
|---|---|
| CN104151273A CN104151273A (en) | 2014-11-19 |
| CN104151273B true CN104151273B (en) | 2016-01-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410409273.1A Expired - Fee Related CN104151273B (en) | 2014-08-19 | 2014-08-19 | Device and the technique of furfural is extracted from paper waste |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113956219A (en) * | 2021-11-01 | 2022-01-21 | 上海昶法新材料有限公司 | Process flow for producing furfural from papermaking wastewater |
| CN114031584A (en) * | 2021-11-30 | 2022-02-11 | 上海昶法新材料有限公司 | Method for producing furfural from hemicellulose |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1634903A (en) * | 2004-11-12 | 2005-07-06 | 山东泉林纸业有限责任公司 | Method for preparing furfural from acidified filtrate of pulping black liquid |
| CN204058312U (en) * | 2014-08-19 | 2014-12-31 | 衡水中科信能源有限公司 | The device of furfural is extracted from paper waste |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BR112013030230A2 (en) * | 2011-05-26 | 2016-08-09 | Liquid Lignin Company Llc | process for the production of furfural from black liquor |
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- 2014-08-19 CN CN201410409273.1A patent/CN104151273B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1634903A (en) * | 2004-11-12 | 2005-07-06 | 山东泉林纸业有限责任公司 | Method for preparing furfural from acidified filtrate of pulping black liquid |
| CN204058312U (en) * | 2014-08-19 | 2014-12-31 | 衡水中科信能源有限公司 | The device of furfural is extracted from paper waste |
Non-Patent Citations (1)
| Title |
|---|
| 草浆造纸黑液ASF（活性炭、硫酸钠、糠醛）综合利用工艺研究;周书天等;《环境科学学报》;19930630;第13卷(第2期);第250-254页 * |
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