CN101219839A - Non-wastewater discharge process technique for furfurol industry - Google Patents
Non-wastewater discharge process technique for furfurol industry Download PDFInfo
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- CN101219839A CN101219839A CNA2007100552191A CN200710055219A CN101219839A CN 101219839 A CN101219839 A CN 101219839A CN A2007100552191 A CNA2007100552191 A CN A2007100552191A CN 200710055219 A CN200710055219 A CN 200710055219A CN 101219839 A CN101219839 A CN 101219839A
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Abstract
The invention discloses a treatment process for the industrial non-wastewater discharge in furfural industries. The process comprises the steps of removal of low-boiling residues by oxidization and degassing, removal of oils and high-boiling residues, mixture of gas and liquid and vapor phase heating in sequence. In the process, the separated low-boiling residues are sent to a boiler for combustion and the separated oils residues are also sent to the boiler for combustion to generate the vapor, thus providing the overheated vapor for the mixture of the gas and the liquid and the vapor phase heating.The high-boiling residues are sent to a diluted acid tank and taken as diluted acid solution. Waste water is processed by the mixture of the gas and the liquid as well as the vapor phase heating to generate saturation acidic vapor and then to sent to by recycling in furfural hydrolysis process.In the whole process, not only the residues is used, but also the non-wastewater discharge is realized.Besides, a new path is paved for the development of the furfural industry.The invention belongs to an environmental protection, energy saving and circular economy project with high efficiency, which is economic and applicable.The invention has the advantages of reasonable process and design, novel and unique conception, simple device and operation, suitable industrial promotion, remarkable social and economic benefits, wide application prospects and so on.
Description
Technical field:
The present invention relates to a kind of processing method of industrial waste water, particularly relate to a kind of treatment process of the waste water that produces in the furfural production process being carried out non-wastewater discharge.
Background technology:
China is the country that the world mainly produces furfural and output furfural rough-wrought product, because that China produces the raw material of furfural is very abundant, furfural already develops and advances by leaps and bounds in recent years, and scale constantly enlarges, and output also improves constantly.But in the furfural production process, a large amount of trade effluents all will discharge in each enterprise, produces furfural per ton according to the preliminary statistics and approximately will produce 17 tons of waste water.And containing organism in the waste water more than 24 kinds, COD, BOD reach 16000 milligrams, 6000 milligrams respectively for every liter.Described 24 kinds of organism are concluded and can be divided into low-boiling-point substance class, high boiling material class, lipid, acidic substance class four classes.These waste water will cause serious pollution to ecotope.Along with the increasing of China to the dynamics of curbing environmental pollution, whether the improvement of waste water is directly connected to the survival and development of furfural enterprise under the furfural enterprise tower.As seen it is imperative to handle industrial wastewater from furfural production.But the appropriate treatment process of none still up to the present, for this reason, it is that this field is thirsted for solving and a still unsolved difficult problem for a long time.
Summary of the invention:
The present invention solves the waste water that produces in the furfural production process to be carried out non-wastewater discharge to handle, thereby reduces waste water to the severe contamination that ecotope causes, and solves this field and thirsts for the difficult problem that solves for a long time.And when reducing pollution, make enterprise receive bigger development.
Non-wastewater discharge process technique for furfurol industry of the present invention is to be outgased to remove to hang down by oxidation to boil, constitute except that grease goes the processing steps in sequence that height boils, vapour-liquid is mixed, vapour phase heats.
It is furfural waste-water to be squeezed at 95-98 ℃ of undercut angles take off the device that boils that the oxidation degassing removes low boiling, it cuts the packed bed rotating speed greater than 100, number of transfer unit is between 3-6, transfer unit height is the 300-400 millimeter, and be catalyzer with oxygen, interior filling material makes air contact with the water thorough mixing, under flow velocity and difference in specific gravity effect low boiling substance is isolated from furfural waste-water.
Removing oil-fat and high-boiling product is the oxidation degassing to be removed the furfural waste-water that hangs down after boiling adopt corner cut to enter device for removing oil-fat and high-boiling product, wastewater temperature is 90 ℃, flow velocity is 1200M/H, separate with rotating centrifugal through baffle separation, proportion is isolated greater than 1.15 high boiling material matter at oil substances and the proportion of 0.8-0.82.And proportion enters the vapour-liquid mixing device at the waste water of 0.9-1.10.
It is that the waste water that adopts 160-200 ℃ of steam contrast to focus on 0.9-1.10 carries out the carbonated drink exchange that vapour-liquid is mixed, and generates 140 ℃ sour water steam.
Vapour phase heating is that to adopt vapor pressure be 1.25Mpa, 280 ℃ superheated vapour, vapour-liquid is mixed the sour water steam that produces heat, and makes it to become fullly to close the hydrolysis kettle that acid vapors enters furfural hydrolysis technology and utilize.
Beneficial effect of the present invention: above-mentioned technology has been taked in this invention, at first removing the low technology of boiling by the oxidation degassing isolates the low boiling substance in the waste water, enter boiler combustion by vacuum suction, go the high technology of boiling to isolate grease and high boiling material matter through removing grease waste water again, wherein grease is mixed furfuraldehyde waste slag and is participated in boiler combustion, and mixing with the vapour phase heating for vapour-liquid provides superheated vapour.High boiling material matter is admitted to the diluted acid jar and makes diluted acid, sends into hydrolysis kettle after will stirring with the corn cob of pulverizing and produces furfural.And waste water through vapour-liquid mix with the vapour phase heat treated after form and fullly close the hydrolysis kettle that acid vapors sends into furfural hydrolysis technology again and utilize again.Whole process not only makes utilization of waste material, and has realized non-wastewater discharge.Reliably realized goal of the invention.And open up a new way for the development of furfural enterprise.This invention belongs to high-efficiency environment friendly energy-conservation, recycling economy project, not only economy but also be suitable for.Have also that the industry simple to operation, suitable of reasonable, the novel uniqueness of technological design, equipment is promoted, economic results in society significantly, advantage such as have a extensive future.
Description of drawings:
Fig. 1 is the schema of non-wastewater discharge process technique for furfurol industry.
Embodiment:
By non-wastewater discharge process technique for furfurol industry shown in Figure 1 at first is furfural waste-water to be squeezed into by the high-pressure pump corner cut 95 ℃ the time take off the device that boils and carry out the oxidation degassing and remove and lowly boil 1, it cuts the packed bed rotating speed greater than 100, number of transfer unit is between 3-6, transfer unit height is to carry out under the negative pressure for the 300-400 millimeter, dress ripple packing in the device, and aerating oxygen is as catalyzer, air is contacted with the water thorough mixing, utilize flow velocity and difference in specific gravity that low boiling substances such as methyl alcohol, acetone, acetaldehyde are isolated from furfural waste-water.Isolated moisture low-boiling-point substance separates the low organism that boils of back gained through carbonated drink again and directly sends into boiler through the pipeline connection and burn.Removing the low furfural waste-water that boils after 1 through the oxidation degassing still adopts corner cut to enter device for removing oil-fat and high-boiling product by high-pressure pump to be except that grease removes height and to boil 2, this moment, wastewater temperature was 90 ℃, flow velocity is 1200M/H, separate with rotating centrifugal through baffle separation, especially the rotation by water, make proportion be collected at device top at the oil substances of 0.8-0.82, proportion sinks in the rotating centrifugal effect greater than 1 waste water, and proportion is greater than the minimum position of the heavy collection of 1.15 high boiling material matter at device.So just, can utilize flow velocity proportion separation principle that grease and high boiling material are separated.Because lipid is the lightest, is provided with the water-and-oil separator secondary separation on device top grease is discharged.Isolated grease is mixed furfuraldehyde waste slag and is participated in boiler combustion, and water refluxes.The high boiling material of proportion maximum is isolated from bottom of device and is entered the diluent of mixing acid.Proportion enters the vapour-liquid mixing device at the waste water of 0.9-1.10 to carry out vapour-liquid and mixes 3.It is that to adopt 190-200 ℃ of steam be that 1.0 waste water carries out the carbonated drink exchange to proportion that vapour-liquid mixes 3, generates 140 ℃ sour water steam.Then sour water steam is sent into steam heater again and carry out vapour phase heating 4.It is 1.25Mpa, 280 ℃ superheated vapour that vapor pressures are adopted in vapour phase heating 4, makes it to become fullly to close the hydrolysis kettle that acid vapors enters furfural hydrolysis technology and utilize.Whole technological process realizes non-wastewater discharge.Not only environmental protection but also energy-conservation, not only economy but also practicality can also make furfural manufacturing enterprise come back to life.Have remarkable social benefit and economic benefit.
Claims (5)
1. non-wastewater discharge process technique for furfurol industry is characterized in that: this treatment process is to be removed by the oxidation degassing lowly to boil (1), remove grease and go the processing steps in sequence that height boils (2), vapour-liquid is mixed (3), vapour phase heating (4) to constitute.
2. non-wastewater discharge process technique for furfurol industry according to claim 1, it is characterized in that: it is furfural waste-water to be squeezed at 95-98 ℃ of undercut angles take off the device that boils that the oxidation degassing removes low boil (1), it cuts the packed bed rotating speed greater than 100, number of transfer unit is between 3-6, transfer unit height is the 300-400 millimeter, and is catalyzer with oxygen, interior filling material, air is contacted with the water thorough mixing, under flow velocity and difference in specific gravity effect, low-boiling-point substance is isolated from furfural waste-water.
3. non-wastewater discharge process technique for furfurol industry according to claim 1, it is characterized in that: remove grease go height boil (2) be that the furfural waste-water that the oxidation degassing removes after low boil (1) is adopted the corner cut access to plant, wastewater temperature is 90 ℃, flow velocity is 1200M/H, separate with rotating centrifugal through baffle separation, proportion is isolated greater than 1.15 high boiling material matter at oil substances and the proportion of 0.8-0.82, and proportion enter vapour-liquid mixing (3) at the waste water of 0.9-1.10.
4. non-wastewater discharge process technique for furfurol industry according to claim 1 is characterized in that: it is that the waste water that adopts 160-200 ℃ of steam contrast to focus on 0.9-1.10 carries out the carbonated drink exchange that vapour-liquid is mixed (3), generates 140 ℃ sour water steam.
5. non-wastewater discharge process technique for furfurol industry according to claim 1, it is characterized in that: vapour phase heating (4) is that to adopt vapor pressure be 1.25Mpa, 280 ℃ superheated vapour, the sour water steam that vapour-liquid is mixed (3) generation heats, and makes it to become the full acid vapors of closing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100552191A CN101219839A (en) | 2007-01-09 | 2007-01-09 | Non-wastewater discharge process technique for furfurol industry |
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2007100552191A CN101219839A (en) | 2007-01-09 | 2007-01-09 | Non-wastewater discharge process technique for furfurol industry |
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| CN101219839A true CN101219839A (en) | 2008-07-16 |
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| CNA2007100552191A Pending CN101219839A (en) | 2007-01-09 | 2007-01-09 | Non-wastewater discharge process technique for furfurol industry |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102452645A (en) * | 2010-10-25 | 2012-05-16 | 山东金缘生物科技有限公司 | Process for recovering furfural and sulfuric acid from furfural residues |
-
2007
- 2007-01-09 CN CNA2007100552191A patent/CN101219839A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102452645A (en) * | 2010-10-25 | 2012-05-16 | 山东金缘生物科技有限公司 | Process for recovering furfural and sulfuric acid from furfural residues |
| CN102452645B (en) * | 2010-10-25 | 2013-07-17 | 山东金缘生物科技有限公司 | Process for recovering furfural and sulfuric acid from furfural residues |
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Open date: 20080716 |