CN105198150A - Reuse treatment process device for furfural wastewater - Google Patents
Reuse treatment process device for furfural wastewater Download PDFInfo
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- CN105198150A CN105198150A CN201510692423.9A CN201510692423A CN105198150A CN 105198150 A CN105198150 A CN 105198150A CN 201510692423 A CN201510692423 A CN 201510692423A CN 105198150 A CN105198150 A CN 105198150A
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Abstract
The invention discloses a reuse treatment process device for furfural wastewater. According to the reuse treatment process device, wastewater produced by hydrolysis, prefractionation, fractionation and rectification of furfural and other products in a production line is collected to a wastewater pool, and is then subjected to dethickening by using dethickening machinery, and sodium carbonate is added to the wastewater subjected to dethickening separation, so that the wastewater reaches neutral to generate a sodium acetate solution. MVR (Mechanical Bapor Recompression) technology treatment equipment is adopted to carry out low-temperature evaporation and compression treatment, then the sodium acetate is recovered, and the condensate water which is obtained by evaporation after steam condensation can be completely reused to a furfural production system. Evaporation and gasification are carried out by adopting low temperature of 86 to 90 DEG C and at a pressure 0.03 to 0.08 MPa higher than the atmospheric pressure. According to the reuse treatment process device disclosed by the invention, 60 kilowatt-hours can be produced from 1 ton of wastewater, and the reuse treatment process belongs to an energy-saving production device.
Description
Technical field
The present invention relates to the treatment facility of the waste water produced in furfural production line.
Background technology
Furfural is the large chemical product for export of China, and quality product is in advanced international standard, very promising.But in recent years, environment problem of protecting has become the bottleneck of restriction the sector development.The source of pollution mainly trade effluent of furfural industry, belongs to the organic waste water being difficult to administer; The wastewater treatment of current most furfural mill mostly adopts biological contact oxidation process, first by waste water liming neutralization, flocculation sediment, and then carries out anaerobism, aerobic treatment; But owing to investing greatly, floor space is wide, working cost is high, and is difficult to reach qualified discharge, makes a lot of producer face the predicament of suspending operations for consolidation.
The feature of furfural production waste water:
The waste water of furfural mill mainly produces in still-process, and it comprises the tower top waste water of waste water and dehydration tower at the bottom of the tower of topping still; Containing acetic acid, furfural and alcohols, aldehydes, ketone, ester class, 40 gas chromatographies such as organic acid in waste water, wherein based on acetic acid, furfural have a large amount of high boiling point organic compounds; PH value is low, is 2-3; COD concentration is high, and generally at 16000-20000mg/l, dustiness is high; But its BOD compares lower, is about about 2500-3000mg/l, so the biodegradability of waste water is not good.
MVR is the abbreviation of steam mechanical recompression (mechanicalvaporrecompression).Mvr is the energy re-using the secondary steam that it self produces, thus reduces a power-saving technology of the demand of the energy to external world.Its working process of vaporizer is compressed through compressor by the steam of low-temperature level, and temperature, pressure improve, and heat content increases, and then enters interchanger condensation, to make full use of the latent heat of steam.Originally the steam will discarded just is fully utilized, and has reclaimed latent heat, has turn improved thermo-efficiency, and the economy of raw steam is equivalent to 30 effects of multiple-effect evaporation.
Summary of the invention
Goal of the invention:
The invention provides the overall treatment of waste water and the device of recycling and operation process thereof that produce in each step of a kind of furfural production line.
Technical scheme:
The treatment for reuse device of a kind of furfural waste-water provided by the invention and technique thereof, the waste water produced in hydrolysis in the production line of the products such as furfural, fore-running, fractionation and rectifying is pooled in wastewater disposal basin, thick process is taken off through de-thick machinery, in the waste water of de-thick separation, (containing acetic acid) adds sodium carbonate, make it reach neutral, generate sodium acetate (NaAc) solution.Adopt MVR technical finesse equipment (containing warming apparatus, pressurizing device, reboiler) again, carry out low-temperature evaporation processed compressed, reclaim sodium acetate, the water of condensation after the vapor condensation be evaporated all can be back to use in furfural production system.
Described MVR technology adopts low temperature 86-90 DEG C, and increase 0.03-0.08MPa than normal atmosphere and carry out evaporation gasification, evaporation generating is used in furfural production system.1 ton of water produces 60 degree of electricity, belongs to energy-saving production equipment.
The waste water that each step produces is as follows:
(1) furfural heats up in a steamer: from rare aldehyde liquid of hydrolysis, containing furfural 4-6%, and containing low-boiling-point substances such as formic acid, methyl alcohol, acetaldehyde, adopt distillation purification techniques to purify, produce the organic waste water containing furfural in this process, main component is acetic acid.
(2) Desultwater Station: for meeting the water quality requirement of oiler feed, arrange Desultwater Station and carry out except Ficus caricaL former water, waste water is mainly from zwitterion resin regeneration.
(3) workshop appliance and terrace flushing waste water, principal pollutant are SS(suspended substance), COD and BOD5.
(4) corn cob hydrolytic residue filtrate, principal pollutant are COD, BOD5 and sulfate ion.Corn cob hydrolytic residue water ratio 40-50%.
(5) life and chemical examination waste water, principal pollutant are SS, COD and BOD5.
(6) other waste water: other waste water is mainly from boiler periodic blow down water, water in water circulating system with water and life chemical examination waste water etc.
Beneficial effect:
The principal feature of furfural waste-water reuse treatment process device:
1) floor space is little, facility investment is few, uses wide; Adopt this technique not need to increase plant area, and do not affect original production technique, only need to do some in existing production technique and change, take up an area the corner that space only needs existing furfural workshop;
2) simple flow, simple to operate, whole instrumentation automatic control, does not need to increase operator, is patrolled and examined just can meet production by former rectifying workman timing;
3) realize furfural production waste water zero release, acetic acid and the Lipid use of fuel value will be had in furfural waste-water, and not only increase the burning of boiler, the pollution of flue gas to air can also be reduced;
4) because waste water evaporates again, the hydrolysis of a large amount of acetic acid in waste water for raw material can be reclaimed, decrease the consumption of sulfuric acid in production; A small amount of furfural simultaneously in waste water is recovered utilization, and what add raw material goes out aldehyde rate, reduces production cost;
5) in traditional technology, Boiler Steam directly enters after hydrolyzer enters tower and becomes waste water, steam cannot be recycled, this technique adopts Boiler Steam indirect evaporation waste water, steam just to become after water of condensation back boiler again and utilizes, not only reduce the processing load of boiler soft water, reduce processing costs, and save a large amount of water consumptions, average furfural per ton can save 5 ~ 10 tons of water consumptions.
6) working cost is low, and equipment maintenance is simple.
Accompanying drawing explanation
Fig. 1 is a process flow diagram of the present invention.
Embodiment
The reuse treatment process device of furfural waste-water as shown in Figure 1, is pooled in wastewater disposal basin by the waste water produced in the hydrolysis in the production line of the products such as furfural, fore-running, fractionation and rectifying, and waste water first takes off thick process through de-thick machinery; Add sodium carbonate in the waste water of de-thick separation, make it reach neutral, generate sodium acetate solution; Adopt MVR technical finesse equipment again, carry out low-temperature evaporation processed compressed, reclaim sodium acetate, the water of condensation after the vapor condensation be evaporated all can be back to use in furfural production system.
MVR technology wherein adopts low temperature 86-90 DEG C, and the air pressure increasing 0.04-0.07MPa than normal atmosphere carries out evaporation gasification.
The steam that low-temperature evaporation produces generates electricity, and institute's electricity is used in furfural production water system.
Claims (4)
1. a reuse treatment process device for furfural waste-water, is pooled in wastewater disposal basin by the waste water produced in the production line of the products such as furfural, it is characterized in that: waste water first takes off thick process through de-thick machinery; Add sodium carbonate in the waste water of de-thick separation, make it reach neutral, generate sodium acetate solution; Adopt MVR technical finesse equipment again, carry out low-temperature evaporation processed compressed, reclaim sodium acetate, the water of condensation after the vapor condensation be evaporated all can be back to use in furfural production system.
2. the reuse treatment process device of furfural waste-water as claimed in claim 1, is characterized in that: MVR technology adopts low temperature 86-90 DEG C, and the air pressure increasing 0.03-0.08MPa than normal atmosphere carries out evaporation gasification.
3. the reuse treatment process device of furfural waste-water as claimed in claim 1, it is characterized in that: the steam that low-temperature evaporation produces generates electricity, institute's electricity is used in furfural production water system.
4. the reuse treatment process device of furfural waste-water as claimed in claim 1, is characterized in that: only the waste water produced in the hydrolysis in furfural production streamline, fore-running, fractionation and rectifying is pooled to wastewater disposal basin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510692423.9A CN105198150A (en) | 2015-10-23 | 2015-10-23 | Reuse treatment process device for furfural wastewater |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510692423.9A CN105198150A (en) | 2015-10-23 | 2015-10-23 | Reuse treatment process device for furfural wastewater |
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| CN105198150A true CN105198150A (en) | 2015-12-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510692423.9A Pending CN105198150A (en) | 2015-10-23 | 2015-10-23 | Reuse treatment process device for furfural wastewater |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107129103A (en) * | 2017-05-09 | 2017-09-05 | 济南大学 | A kind of furfural production waste water integrated treatment utilizes technique and method |
Citations (5)
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|---|---|---|---|---|
| JP2004089873A (en) * | 2002-08-30 | 2004-03-25 | Sumitomo Heavy Ind Ltd | Distillation apparatus and method |
| CN1872726A (en) * | 2006-06-07 | 2006-12-06 | 济南圣泉集团股份有限公司 | Method for treating wastewater from furfural production |
| CN101012092A (en) * | 2007-01-24 | 2007-08-08 | 沈阳理工大学 | Process for treating furfural waste water |
| CN104129881A (en) * | 2014-07-30 | 2014-11-05 | 宏业生化股份有限公司 | Furfural wastewater treatment system and process |
| CN205420042U (en) * | 2015-10-23 | 2016-08-03 | 上海毅知实业有限公司 | Retrieval and utilization treatment process device of furfural waste water |
-
2015
- 2015-10-23 CN CN201510692423.9A patent/CN105198150A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004089873A (en) * | 2002-08-30 | 2004-03-25 | Sumitomo Heavy Ind Ltd | Distillation apparatus and method |
| CN1872726A (en) * | 2006-06-07 | 2006-12-06 | 济南圣泉集团股份有限公司 | Method for treating wastewater from furfural production |
| CN101012092A (en) * | 2007-01-24 | 2007-08-08 | 沈阳理工大学 | Process for treating furfural waste water |
| CN104129881A (en) * | 2014-07-30 | 2014-11-05 | 宏业生化股份有限公司 | Furfural wastewater treatment system and process |
| CN205420042U (en) * | 2015-10-23 | 2016-08-03 | 上海毅知实业有限公司 | Retrieval and utilization treatment process device of furfural waste water |
Non-Patent Citations (1)
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| 田冬梅等: "糠醛废水治理技术的进展", 《辽宁大学学报（自然科学版）》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107129103A (en) * | 2017-05-09 | 2017-09-05 | 济南大学 | A kind of furfural production waste water integrated treatment utilizes technique and method |
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Addressee: Shanghai Yizhi Enterprise Co., Ltd. Document name: Written decision of reexamination |
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Application publication date: 20151230 |
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