CN209940716U - System for degrading high-concentration organochlorine wastewater - Google Patents
System for degrading high-concentration organochlorine wastewater Download PDFInfo
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- CN209940716U CN209940716U CN201920016179.8U CN201920016179U CN209940716U CN 209940716 U CN209940716 U CN 209940716U CN 201920016179 U CN201920016179 U CN 201920016179U CN 209940716 U CN209940716 U CN 209940716U
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Abstract
The utility model discloses a system for degrading high concentration organochlorine waste water, the system includes low temperature evaporator, photocatalytic device, low temperature evaporator's delivery port and photocatalytic device water inlet intercommunication. The utility model discloses a system distills earlier low boiling point chlorine-containing organic matter, separates it from waste water, carries out photocatalysis to high boiling point chlorine-containing organic matter afterwards and handles, reduces into chloride ion with the chlorine residue, can effectively get rid of the organic chlorine in the waste water, has reduced the running cost and the energy consumption of technology effectively, system operation is simple to reduce secondary pollutant's formation volume, and the high salt waste water's after the concentration processing at last product water concentration < 0.05%, the high salt concentrated water concentration > 20%.
Description
Technical Field
The utility model relates to a pollutant processing technology field, concretely relates to system for degrading high concentration organochlorine waste water.
Background
The chlorine-containing organic matter mainly comprises chloralkane, chloroalkene, chloroethyne, chloroaromatic compounds and chlorinated organic salts. The compound is simple to prepare, low in price and easy for industrial production. Therefore, the water purifying agent has wide application in the fields of metal cleaning, organic extraction, pharmaceutical and chemical intermediates and various water purifying agents. Therefore, the waste water discharged from the fields contains more or less organic chlorine compounds. However, most chlorinated organics have certain biological toxicity and are discharged without further treatment. Can cause serious pollution to water or the atmosphere and can seriously threaten the health of human beings and animals. Therefore, the treatment of such waste water is very important. At present, the treatment technology of the wastewater comprises a physical adsorption method, an advanced oxidation method, an organic extraction method and the like. However, these methods are generally only applicable to single-component waste water, and it is generally difficult to achieve low-cost, high-efficiency removal of waste water containing two or more organic chlorides.
The three common methods have certain defects, and mainly comprise the following steps:
(1) adsorption method. The method transfers the pollutants into the pores of the macroporous material to achieve the aim of removing the pollutants. The technology is simple, the cost is low, and the wastewater with complex components can be treated. However, because the pores of the adsorbent are limited, the adsorbent is not adsorbed any more after saturation of adsorption, so that the removal efficiency is limited. Therefore, the method is only suitable for low-concentration wastewater treatment.
(2) An oxidation method. The method uses various oxidants (O)3、KMnO4Fenton reagent, etc.) to convert the macromolecular chlorine-containing organic matter into the micromolecular organic matter, thereby achieving the purpose of removing pollutants. The method has simple technology and high oxidation efficiency, and is suitable for treating high-concentration organic wastewater. However, this method generally cannot completely oxidize chlorinated organic compounds, and the subsequent treatment of a part of the residual oxidizing agent is difficult, thereby easily causing secondary pollution.
(3) Organic extraction method. The method is a phase transfer method, and organic pollutants are transferred into an organic solvent, so that the pollutants and water are separated. The removal efficiency is high, and the extractant can be reused. However, the whole process is complex, the investment cost is high, and partial organic matters cannot be extracted due to the polarity difference among the organic matters. In addition, organic solvents also have some biological toxicity and are therefore difficult to handle on a large scale.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the weak point that prior art exists and provide a novel organochlorine effluent disposal system, this system uses low temperature evaporation and ultraviolet lamp photocatalysis to be the main part, distills low boiling point chlorinated organic matter earlier, separates out from waste water with it, carries out photocatalysis to high boiling point chlorinated organic matter afterwards and handles, reduces into chloride ion with the chlorine residue to reach the purpose of getting rid of the organochlorine in the waste water, and reduce the cost of technology as far as possible.
In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a degradation high concentration organochlorine effluent disposal system, includes low temperature evaporator, photocatalysis unit, the delivery port and the photocatalysis unit water inlet intercommunication of low temperature evaporator.
The utility model combines the low temperature evaporator and the photocatalysis device, the low temperature evaporator can distill the low boiling point chlorine-containing organic matters in the mixed organic chlorine wastewater, the distilled chloroform enters the recycling solvent storage tank after condensation, and the subsequent recycling is convenient; the residual chlorine-containing wastewater enters a photocatalysis device, and effective chlorine in the residual chlorine-containing wastewater can be converted into chloride ions through the action of ultraviolet light, so that the subsequent treatment is facilitated. The utility model discloses a processing system separates out its follow waste water through distilling low boiling point chlorine-containing organic matter earlier, carries out the photocatalysis to high boiling point chlorine-containing organic matter afterwards and handles, reduces into chloride ion with the chlorine residue to reach the purpose of getting rid of the organochlorine in the waste water. The system combines two devices for use, replaces a single direct photocatalysis device for photocatalysis, reduces the amount of the highly toxic pollutant phosgene which is possibly generated to the minimum (the generation amount is only 0.3 to 0.5 percent of the direct photocatalysis), and reduces the cost of the process as much as possible.
As the preferred embodiment of the high concentration organochlorine degradation wastewater treatment system, the wastewater treatment system further comprises a dosing system, and the water outlet of the photocatalytic device is communicated with the water inlet of the dosing system;
in fact, the chlorine dioxide releases hypochlorous acid (HClO) slowly under the action of the ultraviolet lamp, and most of the hypochlorous acid is reduced to Cl under the action of the ultraviolet light-. The reaction equation is as follows:
2HClO＝2HCl+O2↑；
however, a small amount of unreacted hypochlorous acid, if not treated, may cause secondary pollution to the air or damage to subsequent equipment. In addition, although the low-temperature evaporation efficiency is high (eta is approximately equal to 98-99%), part of the solvent is not evaporated, and the trace amount of the solvent can generate the highly toxic phosgene (COCl) under the action of ultraviolet light during the photocatalytic reaction2). The reaction equation is as follows:
CHCl3→CHOCl3→COCl2+HCl；
based on the reasons, the invention carries out chemical adding treatment after the subsequent photocatalytic treatment, the added medicament is mainly solid NaOH, and the reaction equation is as follows:
HClO+NaOH＝NaClO+H2O；
COCl2+4NaOH＝Na2CO3+2NaCl+2H2O；
most of the pollutants in the wastewater after the chemical adding treatment are removed. By mixing small amounts of the formed contaminants (mainly HClO and COCl)2) And the secondary pollution is avoided.
As the utility model discloses degradation high concentration organochlorine effluent disposal system's preferred embodiment, effluent disposal system still includes RO membrane device, the delivery port and the RO membrane device water inlet intercommunication of medicine system.
Most of pollutants in the wastewater passing through the dosing system are removed; however, the inorganic salts (NaCl, Na) therein2CO3Etc.) are higher and still not reachedTo the emission requirements. Therefore, the utility model discloses a RO membrane device carries out reverse osmosis treatment to waste water, carries out concentrated treatment to high salt solution (wt% ≈ 0.5 ~ 1.2). The concentration of the treated produced water is less than 0.05 percent, and the concentration of the high-salinity concentrated water can reach 20 to 32 percent, thereby facilitating the subsequent evaporation and recovery of the crystallized salt.
As the utility model discloses degrade high concentration organochlorine effluent disposal system's preferred embodiment, effluent disposal system still includes filter equipment, filter equipment's delivery port intercommunication low temperature evaporator's water inlet. The utility model discloses at first carry out filtration treatment with high concentration organochlorine waste water earlier through filter equipment to get rid of the impurity in the waste water, avoid blockking up subsequent management or damage subsequent equipment.
As the preferred embodiment of the high concentration organochlorine wastewater treatment system, the photocatalytic device comprises an ultraviolet lamp tube and a catalyst plate which is coated with photocatalytic coating;
the photocatalysis device of the utility model not only contains the ultraviolet lamp, but also adds a coating TiO2The catalyst plate of the photocatalytic coating is convenient for improving the catalytic efficiency.
As the utility model discloses the preferred embodiment of degradation high concentration organochlorine effluent disposal system, the delivery port of low temperature evaporator still communicates there is the recovery solvent storage tank. The distilled chloroform enters a solvent recovery storage tank after being condensed, so that the subsequent recycling is facilitated.
As the utility model discloses the preferred embodiment of degradation high concentration organochlorine effluent disposal system, the delivery port of RO membrane device communicates high salt dense water storage tank and product water storage tank respectively.
As the utility model discloses degradation high concentration organochlorine effluent disposal system's preferred embodiment, the pipeline intercommunication is all adopted in the intercommunication, be equipped with the control valve on the pipeline.
The beneficial effects of the utility model reside in that: the utility model discloses a system for degrading high concentration organochlorine waste water, this system distill through low boiling point chlorine-containing organic matter earlier, separate out it from waste water, carry out photocatalysis to high boiling point chlorine-containing organic matter afterwards and handle, restore into chloride ion with the chlorine residue, can effectively get rid of the organochlorine in the waste water, reduced the running cost and the energy consumption of technology effectively, system operation is simple to reduce secondary pollutant's formation volume, and the product water concentration of the high salt waste water after the concentrated processing at last < 0.05%, and the high salt concentrated water concentration > 20%.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
In the figure: 1. a mixed wastewater storage tank; 2. a filtration device; 3. a low temperature evaporator; 4. a recovered solvent storage tank; 5. a photocatalytic device; 6. a dosing device; 7. an RO membrane device; 8. a high-salinity concentrated water storage tank; 9. a produced water storage tank; 10. a pipeline; 11. and (4) controlling the valve.
Detailed Description
For better illustrating the objects, technical solutions and advantages of the present invention, the present invention will be further described with reference to the following embodiments.
Examples
The utility model discloses an embodiment of degradation high concentration organochlorine effluent disposal system, as shown in FIG. 1, this embodiment degradation high concentration organochlorine effluent disposal system includes mixed waste water storage tank 1, filter equipment 2, low temperature evaporator 3, photocatalytic device 5, charge device 6, RO membrane device 7, the storage tank that communicate in proper order through pipeline 10. The low-temperature evaporator 3 is communicated with a recovered solvent storage tank 4, and the storage tank comprises a high-salinity concentrated water storage tank 8 and a produced water storage tank 9; the water outlet of the RO membrane device 7 is respectively communicated with a high-salinity concentrated water storage tank 8 and a produced water storage tank 9, and a control valve 11 is arranged on a connecting pipeline between the adjacent devices.
The evaporation temperature of the low-temperature evaporator of the embodiment is 60-70 ℃, preferably 66 ℃, the photocatalytic device 5 comprises an ultraviolet lamp tube 51 with power of 10W, and a catalyst plate 52 coated with a photocatalytic coating containing TiO2The main component of the solvent is ethanol, and the photocatalytic coating is realized by adopting the prior art.
When the system for degrading high-concentration organic chlorine wastewater is used, the main component in the mixed wastewater storage tank 1 is dichloroSodium isonitrile urea (sodium monochloro, concentration wt% ═ 6), and chloroform (trichloromethane, CHCl), a waste organic solvent3And 0.5) is filtered for 4-8 min through the filtering device 2 to remove impurities in the wastewater, thereby avoiding blocking subsequent management or damaging subsequent equipment. The treated wastewater enters a low-temperature evaporator 3 to be evaporated for 4-6.5 h at low temperature, and chloroform can be distilled out by a low-temperature evaporation method (the boiling point of the chloroform is approximately equal to 60-65 ℃, and is lower than the boiling point of water). The distilled chloroform is condensed and then enters a recovered solvent storage tank 4, so that the subsequent recovery and utilization are facilitated. And the residual chlorine-containing wastewater enters the photocatalytic device 5 for photocatalytic reaction for 10-12 h, and effective chlorine in the residual chlorine-containing wastewater can be converted into chloride ions under the action of ultraviolet light in the ultraviolet light tube, so that the subsequent treatment is facilitated.
In fact, the chlorine dioxide releases hypochlorous acid (HClO) slowly under the action of the ultraviolet lamp, and most of the hypochlorous acid is reduced to Cl under the action of the ultraviolet light-. The reaction equation is as follows:
2HClO＝2HCl+O2↑；
however, a small amount of unreacted hypochlorous acid, if not treated, may cause secondary pollution to the air or damage to subsequent equipment. In addition, although the low-temperature evaporation efficiency is high (eta.98-99%), part of the solvent is not evaporated, and the trace amount of the solvent can generate highly toxic phosgene (COCl) under the action of ultraviolet light when passing through the photocatalytic device 52). The reaction equation is as follows:
CHCl3→CHOCl3→COCl2+HCl；
based on the above reason, the utility model discloses behind subsequent photocatalytic device 5, increase one set of charge device 6 react for 40min ~ 1h in the charge device, the medicament that adds is mainly solid NaOH, the weight of the addition of NaOH is 0.1% ~ 0.2% of the water yield, and the reaction equation is as follows:
HClO+NaOH＝NaClO+H2O；
COCl2+4NaOH＝Na2CO3+2NaCl+2H2O；
after treatmentThe wastewater, wherein the organochlorine wastewater contaminants have been largely removed. The removal rate of the organic chlorine pollutants is more than 98 percent. However, the inorganic salts (NaCl, Na) therein2CO3Etc.) are higher and still do not meet the emission requirements. Therefore, the utility model discloses increased one set of RO (reverse osmosis) device 7 at last, carried out concentrated processing 110 ~ 140min to high salt solution (wt% ≈ 0.5 ~ 1.2). The concentration of the treated produced water is less than 0.05 percent, and the concentration of the high-salinity concentrated water can reach 20 to 32 percent, thereby facilitating the subsequent evaporation and recovery of the crystallized salt.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention.
Claims (8)
1. The system for degrading the high-concentration organic chlorine wastewater is characterized by comprising a low-temperature evaporator and a photocatalytic device, wherein a water outlet of the low-temperature evaporator is communicated with a water inlet of the photocatalytic device.
2. The system for degrading high-concentration organic chlorine wastewater as claimed in claim 1, further comprising a dosing system, wherein a water outlet of the photocatalytic device is communicated with a water inlet of the dosing system.
3. The system for degrading high-concentration organic chlorine wastewater as claimed in claim 2, wherein the system further comprises an RO membrane device, and the water outlet of the chemical feeding system is communicated with the water inlet of the RO membrane device.
4. The system for degrading high-concentration organochlorine wastewater according to claim 1, further comprising a filtering device, wherein a water outlet of the filtering device is communicated with a water inlet of the low-temperature evaporator.
5. The system for degrading high-concentration organochlorine wastewater as set forth in claim 1, wherein the photocatalytic device comprises an ultraviolet lamp tube and a catalyst plate filled with photocatalytic coating.
6. The system for degrading high-concentration organic chlorine wastewater as claimed in claim 1, wherein the water outlet of the low-temperature evaporator is further communicated with a recovered solvent storage tank.
7. The system for degrading high-concentration organic chlorine wastewater as claimed in claim 3, wherein the water outlet of the RO membrane device is communicated with the high-salinity concentrated water storage tank and the water production storage tank respectively.
8. The system for degrading high-concentration organochlorine wastewater according to claim 7, wherein the communication is realized by adopting a pipeline, and a control valve is arranged on the pipeline.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109851113A (en) * | 2019-01-02 | 2019-06-07 | 广东益诺欧环保股份有限公司 | A kind of method and system for the organic chloride wastewater of high concentration of degrading |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109851113A (en) * | 2019-01-02 | 2019-06-07 | 广东益诺欧环保股份有限公司 | A kind of method and system for the organic chloride wastewater of high concentration of degrading |
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Effective date of registration: 20230705 Address after: Room 606, No. 69, Xincheng Middle Road, Jiekou Street, Conghua District, Guangzhou, Guangdong 510999 Patentee after: Guangdong Shangchen Environmental Technology Co.,Ltd. Address before: 510000 room 363, building 4, No. 3, middle Qianjin Road, Aotou Town, Conghua, Guangzhou, Guangdong Patentee before: GUANGDONG YEANOVO ENVIRONMENTAL PROTECTION Co.,Ltd. |
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