CN102070221A - Process for microwave photocatalysis treatment of industrial wastewater and solvent recovery in integrative manner - Google Patents
Process for microwave photocatalysis treatment of industrial wastewater and solvent recovery in integrative manner Download PDFInfo
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- CN102070221A CN102070221A CN2009102378786A CN200910237878A CN102070221A CN 102070221 A CN102070221 A CN 102070221A CN 2009102378786 A CN2009102378786 A CN 2009102378786A CN 200910237878 A CN200910237878 A CN 200910237878A CN 102070221 A CN102070221 A CN 102070221A
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Abstract
The invention provides a new process for the industrial wastewater treatment and the solvent recovery in an integrative coupling manner. The whole process comprises four parts of wastewater conveyance, a microwave electrodeless reactor, gas-liquid balance and condensation recovery. The wastewater enters the microwave electrodes reactor through a liquid transfer pump, and volatile solvents in the wastewater are thermally extracted and separated by utilizing the microwave thermal effect and the heating effect of an electrodeless lamp; and the wastewater after microwave and illumination radiation realizes the separation of gas-liquid phase in a gas-liquid balancer, wherein solvent components are recovered by a condenser, and the wastewater of the liquid phase is further degraded under the illumination. Therefore, the solvents in the wastewater can be directly recovered and reutilized when the photocatalysis treatment of the industrial wastewater is carried out, and the whole process flow is simple and compact.
Description
Technical field
The present invention relates to Industrial Wastewater Treatment, particularly, promptly in wastewater treatment, realize the recycling of volatile solvent in the waste water at containing volatile solvent Industrial Wastewater Treatment and Separation and Recovery solvent to realize the integrated processing technique of resource utilization.
Technical background
Organic solvent, as acetone, ethyl acetate and alcohol, DMF etc., to use in a large number in industrial production as extraction and technology such as washing, the reason of carrying secretly etc. owing to water-soluble and technology causes the water organic solvent to run off in a large number, therefore, have in the trade effluent of major part and contain solvent.Though existing physics and chemistry and biotechnology can be handled trade effluent efficiently, but for the trade effluent that contains volatile vehicle components, also mean when directly handling and eliminated the recyclable solvent in the waste water, both waste valuable resource, also increased the difficulty and the cost of wastewater treatment simultaneously.
The common methods that realizes solvent recuperation from waste water has extraction, membrane sepn, gas to carry and distillation etc.The extraction treatment technology of organic waste water is used widely.Solvent extration is suitable for reclaiming and handling the high-concentration hardly-degradable organic industrial sewage, as phenolic wastewater, organic sulfonic acid class waste water and organic phosphorous nitrogenous class waste water etc.The main drawback of solvent extration is solvent loss and the secondary pollution that causes therefrom.In recent years, membrane separation technique has also obtained using widely in wastewater treatment, can effectively purify waste water, can reclaim some useful matteies again.Application of membrane separation technology has characteristics such as less energy-consumption, efficient height and technology are simple in wastewater treatment, membrane module is succinct, compact, be easy to automated operation, easy to maintenance, compare with other method of wastewater treatment and to have remarkable advantages, so in wastewater treatment, be subjected to special favor.But membrane module cost and the stained problems affect of film the application of membrane separation technique in wastewater treatment at present.
Reach required temperature as long as the heat that contains the easy volatile solvent is proposed separation, just can reach good separating effect.Traditional heat carries mainly that hot water carries out by adding, and as reclaim butylacetate and propyl alcohol solvent from the penicillin waste acid water, adopts to feed superheated vapour to reach the purpose of heating in water body, realizes the recovery of solvent in the waste water solution.So similarly not only heating efficiency is low for traditional heating mode, and can not play the effect of obvious reduction of discharging waste water COD.
The micro-wave nonpolar reactor is a kind of system that induces electrodeless lamp luminous that excites based on microwave plasma.Owing to water shows significant thermal effect to the strong absorption of microwave, so microwave can be used as from waste water heat and carries the thermal source that reclaims volatile solvent.And, electrodeless lamp is subjected to also to produce certain heat in the microwave radiation inductive luminescence process, so, both can strengthen the effect of microwave heat volatile solvent of Separation and Recovery from waste water, can carry out photocatalytic degradation contaminated wastewater thing synchronously again, wastewater treatment and volatile solvent heat can be proposed recovery thus and carry out synchronously.
Summary of the invention
Can produce the special performance that a large amount of heat can be sent high-power UV-light and visible light again when the objective of the invention is to work, be applied to contain the processing of the trade effluent of easy volatile material based on the micro-wave nonpolar reactor.The heat energy that utilizes on the one hand the micro-wave nonpolar reactor to produce realizes that the hot body of volatile substances in the waste water separates, and uses the organic pollutant in the photocatalytic degradation waste water of micro-wave nonpolar reactor simultaneously, reaches the purpose of handling waste water.
Below in conjunction with accompanying drawing 1, the present invention is elaborated.
Whole technology reclaims four partial devices by waste water delivery system, micro-wave nonpolar reactor, vapor liquid equilibrium and condensation and forms.
(1) waste water delivery system: 1. aqua storage tank, 2. infusion pump;
(2) micro-wave nonpolar photo catalysis reactor: 3. microwave generating apparatus, 4. electrodeless lamp, 5. micro-wave nonpolar reactor;
(3) vapor liquid equilibrium device: 6. vapour liquid separator, 7. sting the shape separator;
(4) condensate recovery system: 8. condenser, 9. receiving trap.
For achieving the above object, the present invention is achieved through the following technical solutions.Shown in the flow process of integrated artistic (Fig. 1) is described below.5. 2. the waste water of aqua storage tank in 1. enter the micro-wave nonpolar reactor 3. 4. be made up of with electrodeless lamp microwave generating apparatus through infusion pump, waste water in the micro-wave nonpolar reactor by light radiation and heating, 6. waste water enter the vapor liquid equilibrium device subsequently, liquid phase waste water in the waste water after volatile components solvent and the illumination reaches running balance at the vapor liquid equilibrium device in 6., 8. gas phase after the separation enters condenser, 9. collect the solvent that obtains reclaiming at receiving trap, remaining liquid phase waste water get back to the waste water storage tank and continuously by illumination degrading until reaching processing target.
Consider actual situation and in conjunction with the light-catalysed application characteristic of micro-wave nonpolar, in order to give full play to and utilize heating of microwave pyrogenicity and electrodeless lamp and emitting characteristics, electrodeless lamp in the used micro-wave nonpolar reactor (Fig. 2) of the present invention be the electrodeless lamp of homemade sphere 1., then the electrodeless lamp of sphere is filled in the 2. middle formation filling bed type of homemade glass reactor body phase micro-wave nonpolar photo catalysis reactor as filler, it has three advantages: one, fill spherical electrodeless lamp in the reactor, similar packed bed reactor, increased the resistance of flow of matter, its residence time is increased, and the material that enters reactor simultaneously also reduces the heats increase in a large number; Two, electrodeless lamp is luminous under microwave-excitation, and when electrodeless lamp was luminous, the globular light surface also can produce very high temperature, and a spot of material can reach temperature required in instantaneously heating through the lamp surface; Three, material is being carried out the heat extraction simultaneously, adding catalyzer can carry out simultaneously to the organic pollutant photocatalytic degradation in the waste water.
Therefore, waste water, light and catalyzer in the filling bed type body phase micro-wave nonpolar photo catalysis reactor fully contact, avoid light penetrates in the water photocatalytic process ability and the low problem of solution mass-transfer efficiency, break through traditional photocatalytic system light and penetrated efficient and the low bottleneck problem of solution mass-transfer efficiency, helped exploring the photochemical catalysis amplification technique.
The present invention will be further described with example below.
Embodiment one: extract the ethanol example from aqueous ethanolic solution
Ethanolic soln is carried through peristaltic pump, enters the micro-wave nonpolar reactor, and under microwave and electrodeless lamp dual-heated effect, evaporation enters gas-liquid separator, and reaches vapor liquid equilibrium here, and the ethanol after the separation is collected through condensing works.When microwave power is fixed on 4500W, when reaction solution was 5% ethanolic soln of 1000ml, when regulating peristaltic pump turn up 50r/min, the ethanol rate of recovery was 69.84%.
Embodiment two: the volatile solvent of penicillin waste acid water system extracts example
Butanols and butyl ester content are respectively and enter gas-liquid separator after 0.37% and 0.41% penicillin waste acid water is heated through microwave reactor, and gas phase enters condenser system, and remaining liq is got back to the catalytic treatment of aqua storage tank circulation light.After process micro-wave nonpolar reactor heat was carried, butanol content reduced to 0.09% in the waste water, and butyl ester is all got rid of.As seen this device can extract fully from waste water and reclaim butyl ester, and butanols is also had good recovering effect.Can remove 30% COD separating of butanols and butyl ester in the waste water
CR.Heat is carried waste water behind the solvent and is continued waste water COD behind the photocatalysis treatment 20min and compare the COD of primary penicillin waste acid water and reduced by 50% more than.Therefore, in this technology, can realize the recycling of wastewater treatment and organic solvent synchronously.
Embodiment three: remove the ammonia nitrogen example
During with the initial ammonia concentration of ammonia nitrogen aqueous solution simulation ammonia nitrogen waste water 500mg/L, infusion pump rotating speed 53r/min, regulator solution pH=11, microwave power 900W, aeration rate 400mL/min, ammonia nitrogen solution obtains separating at the gas-liquid separator ammonia at micro-wave nonpolar reactor internal heating, and ammonia nitrogen removal frank reaches 34.0%.
Accompanying drawing is described, and accompanying drawing 1 is that micro-wave nonpolar photocatalysis treatment of waste water and solvent reclaim the process unit synoptic diagram.1. 2. 3. 5. 6. vapor liquid equilibrium device, 7. thorn type separator, 8. condensate recovery system, the 9. solvent of Hui Shouing of micro-wave nonpolar reactor of the 4. electrodeless lamp of microwave generating apparatus of infusion pump of aqua storage tank among the figure.
Accompanying drawing 2 is a filling bed type body phase micro-wave nonpolar photo catalysis reactor, 1. is electrodeless lamp among the figure, 2. is glass reactor.
Claims (6)
1. Industrial Wastewater Treatment and solvent reclaim integrated novel process, reclaim four partial devices by waste water delivery system, micro-wave nonpolar reactor, vapor liquid equilibrium device and condensation and form.
2. according to claim 1, it is characterized in that containing the trade effluent of solvent, solvent such as ethanol, acetone, butylacetate, butanols and can put forward mode from the isolating volatile organic compound of aqueous phase by heat can be the inorganic substance of easy volatile also, as NH
3Deng.
3. according to claim 1, it is characterized in that adopting the micro-wave nonpolar reactor, form by the electrodeless lamp of microwave generating apparatus and the certain mixing element material of filling, wherein mixing element material such as argon gas and mercury get mixture, but are not limited to this.
4. according to claim 1, it is characterized in that adopting the micro-wave nonpolar reactor, utilize microwave to the pyrogenic effect of the thermal effect of the aqueous solution and electrodeless lamp as thermal source, heat is carried the easy volatile solvent that reclaims in the waste water.
5. according to claim 1, it is characterized in that adopting the gas-liquid that realizes volatile solvent and liquid waste water in the vapor liquid equilibrium device to be separated.
6. according to claim 1, adopt the micro-wave nonpolar reactor, utilize the organic pollutant in the luminous degradation treatment waste water of micro-wave nonpolar.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110170244A (en) * | 2019-07-06 | 2019-08-27 | 郭绍华 | Luminescent device packed tower |
| CN110817992A (en) * | 2018-08-10 | 2020-02-21 | 北京化工大学 | Method for treating organic matters in high-salinity wastewater |
-
2009
- 2009-11-20 CN CN2009102378786A patent/CN102070221A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110817992A (en) * | 2018-08-10 | 2020-02-21 | 北京化工大学 | Method for treating organic matters in high-salinity wastewater |
| CN110817992B (en) * | 2018-08-10 | 2022-03-29 | 北京化工大学 | Method for treating organic matters in high-salinity wastewater |
| CN110170244A (en) * | 2019-07-06 | 2019-08-27 | 郭绍华 | Luminescent device packed tower |
| CN110170244B (en) * | 2019-07-06 | 2023-12-19 | 广东风和洁净工程有限公司 | Light-emitting device packing tower |
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Application publication date: 20110525 |