CN114477363A - Treatment device for organic wastewater difficult to degrade - Google Patents
Treatment device for organic wastewater difficult to degrade Download PDFInfo
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- CN114477363A CN114477363A CN202011162216.XA CN202011162216A CN114477363A CN 114477363 A CN114477363 A CN 114477363A CN 202011162216 A CN202011162216 A CN 202011162216A CN 114477363 A CN114477363 A CN 114477363A
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- 238000006731 degradation reaction Methods 0.000 claims abstract description 27
- 230000015556 catabolic process Effects 0.000 claims abstract description 26
- 230000000694 effects Effects 0.000 claims abstract description 23
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- 238000001228 spectrum Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 21
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Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
- C02F1/325—Irradiation devices or lamp constructions
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/02—Specific form of oxidant
- C02F2305/026—Fenton's reagent
Abstract
The invention discloses a treatment device for refractory organic wastewater, which comprises a treatment unit and a metering pump, wherein the treatment unit comprises a transparent reactor with an annular structure and an ultraviolet lamp module penetrating through the central area of the annular structure, and the water inlet of the transparent reactor is communicated with the water outlet of the metering pump; the metering pump is used for pumping the organic wastewater containing the Fenton reagent into the transparent reactor; a transparent reactor for treating organic wastewater; ultraviolet light emitted by the ultraviolet lamp module uniformly irradiates the organic wastewater through the transparent reactor, so that the degradation effect of the organic wastewater is improved. The device couples the photocatalysis technology with the Fenton oxidation technology, avoids the defect of a single technology, and effectively improves the photocatalysis efficiency and the H in the Fenton reagent2O2Utilization ratio of, reduce Fe2+The amount of (A) is suitable for Chemical Oxygen Demand (COD) less than 5000The total organic carbon removal rate of various organic wastewater of mg/L can reach more than 45 percent. The invention is beneficial to promoting the industrialization of the Fenton technology in the field of treatment of organic wastewater difficult to degrade.
Description
Technical Field
The application relates to a treatment device for organic wastewater difficult to degrade, and belongs to the technical field of organic wastewater treatment.
Background
With the development of economy and the increase of population, the contradiction between supply and demand of water resources in China is increasingly aggravated by the large discharge of industrial wastewater and domestic sewage. More and more organic products (such as medicines, pesticides, synthetic fibers, plastics, coal gasification products, liquefied products, petroleum refining products and the like) enter the lives of people, and a large amount of organic substances which are difficult to degrade are generated in the production process. If the substances are discharged to the environment without treatment, the environment is seriously polluted and the human health is threatened. Therefore, the treatment research of the refractory organic wastewater is a hotspot and a difficulty of the current water pollution prevention and treatment research.
Advanced Oxidation Processes (AOPs) are a novel wastewater treatment technology, which mainly uses hydroxyl radicals (HO) with strong Oxidation capability generated in the reaction Process to degrade refractory organics in wastewater into micromolecules and easily biodegradable organics, and even directly mineralize the organics into water and carbon dioxide. The technology has the characteristics of high efficiency, no selectivity and environmental friendliness, so that more and more attention is paid.
Fenton oxidation is an advanced oxidation technology, can oxidize a plurality of known organic compounds such as carboxylic acid, alcohol and ester into inorganic state, has high capability of removing refractory organic pollutants, and has wide application in the treatment of printing and dyeing wastewater, oily wastewater, phenolic wastewater, coking wastewater, nitrobenzene-containing wastewater, diphenylamine wastewater and other wastewater. However, the existing fenton oxidation device has high dosage of iron ions and low utilization rate of an oxidant, and when the fenton oxidation device is applied to degradation of organic wastewater, the degradation effect is poor, a large amount of iron mud can be generated, and secondary pollution is caused.
Disclosure of Invention
An object of this application is to provide a processing apparatus of difficult degradation organic waste water to solve the iron ion's that the fenton oxidation unit that uses among the present organic waste water degradation exists quantity of use higher, the utilization ratio of oxidant is lower, causes organic waste water's degradation effect not good enough and can produce a large amount of iron mud, causes secondary pollution's technical problem.
The treatment device for the refractory organic wastewater comprises a treatment unit and a metering pump, wherein the treatment unit comprises a transparent reactor with an annular structure and an ultraviolet lamp module penetrating through the central area of the annular structure, and the water inlet of the transparent reactor is communicated with the water outlet of the metering pump;
the metering pump is used for pumping the organic wastewater containing the Fenton reagent into the transparent reactor;
the transparent reactor is used for treating the organic wastewater;
ultraviolet light emitted by the ultraviolet lamp module penetrates through the transparent reactor and is uniformly irradiated on the organic wastewater, so that the degradation effect of the organic wastewater is improved.
Preferably, the water storage tank is further included;
a water inlet of the water storage tank is communicated with a water outlet of the transparent reactor and is used for containing the degraded organic wastewater flowing out of the transparent reactor;
and the water inlet of the metering pump is communicated with the water outlet of the water storage tank, and the water outlet of the metering pump is communicated with the water inlet of the transparent reactor and is used for circularly pumping the organic wastewater in the water storage tank into the transparent reactor.
Preferably, the water inlet of the transparent reactor is arranged at the bottom of the side wall of the transparent reactor, so that the organic wastewater enters the transparent reactor in a tangential flow mode;
the water outlet of the transparent reactor is arranged at the top of the side wall of the transparent reactor;
the organic wastewater flows from the water inlet of the transparent reactor to the water outlet of the transparent reactor along the annular structure in a rotating mode at a set flow speed.
Preferably, the reactor further comprises a light protection unit, and the transparent reactor and the ultraviolet lamp module are both arranged inside the light protection unit;
and the light protection unit is used for blocking the ultraviolet light emitted by the ultraviolet lamp module in the light protection unit.
Preferably, the light protection unit comprises a camera bellows and a viewing window;
the transparent reactor and the ultraviolet lamp module are both arranged in the dark box;
the observation window is arranged on a camera bellows door of the camera bellows and is positioned at the orthographic projection position of the transparent reactor;
preferably, the side wall and the top wall of the dark box are also provided with a plurality of through holes for heat dissipation.
Preferably, the device also comprises an air-cooled temperature control unit arranged in the dark box;
the air cooling temperature control unit is used for helping the ultraviolet lamp to dissipate heat and preventing the ultraviolet lamp from working at an overhigh temperature and discharging a small amount of ozone generated in the working process.
Preferably, the uv lamp module comprises a power supply, an exciter, and a uv lamp;
the power supply is connected with the exciter through a cable;
the exciter is also connected with the ultraviolet lamp and is used for exciting the ultraviolet lamp to emit ultraviolet light;
the ultraviolet lamp passes through the central region of the transparent reactor of the annular structure;
preferably, the ultraviolet lamp is an electrodeless deep ultraviolet lamp;
preferably, the electric power of a single electrodeless deep ultraviolet lamp is 300-400W, and the spectrum is mainly short-wavelength 254nm or 185 nm.
Preferably, said H2O2The molar ratio of the addition amount of the Fe to the chemical oxygen demand of the organic wastewater is 1-4: 1, and the Fe2+The amount of addition of (A) and (B) is2O2The molar ratio of the addition amount of (a) is 1: 10-100.
Preferably, the processing unit is multiple;
the treatment units are connected in series, and the water outlet of the metering pump is connected with the transparent reactor in the first treatment unit. A plurality of metering pumps may also be used, each of which is connected to the transparent reactor in one of the treatment units for pumping the organic wastewater containing the fenton's reagent into the transparent reactor.
When a plurality of treatment units are used, the treatment units are connected in series, the metering pump pumps the organic wastewater containing the Fenton reagent into the transparent reactor in the first treatment unit, the organic wastewater sequentially enters the transparent reactor in the second treatment unit and the transparent reactor … … in the third treatment unit under the conveying of the metering pump until the organic wastewater is output after reaching the transparent reactor in the last treatment unit, and the organic wastewater after degradation is output by the transparent reactor in the last treatment unit.
When a plurality of processing units are used, in order to further improve the degradation effect of the organic wastewater, the water inlet of the transparent reactor in the first processing unit can be communicated with the water outlet of the metering pump, the water outlet of the transparent reactor in the last processing unit is communicated with the water inlet of the water storage tank, and the water outlet of the water storage tank is communicated with the water inlet of the metering pump, so that the plurality of processing units, the metering pump and the water storage tank form a circulating system to carry out circulating treatment on the organic wastewater.
Preferably, the material of the transparent reactor is high-permeability quartz.
Compared with the prior art, the treatment device for the organic wastewater difficult to degrade has the following beneficial effects:
the device couples the photocatalysis technology with the Fenton (Fenton) oxidation technology, avoids the defect of a single technology, and effectively improves the photocatalysis efficiency and H2O2Utilization ratio of, reduce Fe2+The dosage of the composite organic carbon treatment agent reduces the generation of iron mud, is suitable for treating various organic wastewater with Chemical Oxygen Demand (COD) less than 5000mg/L, has better pollutant removal effect, and has a Total Organic Carbon (TOC) removal rate of more than 45 percent. The invention is beneficial to promoting the industrialization of the photo-Fenton technology in the field of treatment of refractory organic wastewater.
This application has set up a ring structure's transparent reactor, sets up the ultraviolet lamp module in ring structure's central point and puts for contain H in ultraviolet light of ultraviolet lamp module outgoing and the transparent reactor2O2And Fe2+The organic wastewater is fully contacted, the utilization rate of ultraviolet light is improved, and the photocatalytic effect is ensured, so that the degradation effect of the organic wastewater is improved.
This application has still set up water storage tank and measuring pump, combines water storage tank, measuring pump and processing unit, can realize treating the continuous cycle of degradation organic waste water to same batch, and degradation effect is good, and because the device is simple, so with low costs.
This application has prescribed a limit to the water inlet of transparent reactor and has set up in the lateral wall top of transparent reactor in the lateral wall bottom of transparent reactor and the delivery port of transparent reactor to make waste water be full of transparent reactor, realize the evenly distributed of waste water, simultaneously, because the water inlet sets up in the lateral wall bottom, make the water inlet direction of water inlet and transparent reactor's axial vertical, form the tangential flow during intaking. This application utilizes the tangential flow to hinder the feeding mode such as, can guarantee organic waste water evenly distributed. In addition, this application is injectd organic waste water and is followed the rotatory delivery port that flows to transparent reactor of loop configuration from transparent reactor's water inlet with setting for the velocity of flow for organic waste water's distribution is more even.
The reactor is characterized by also comprising a light protection unit, wherein the transparent reactor and the ultraviolet lamp module are arranged in the light protection unit; and the light protection unit is used for blocking the ultraviolet light emitted by the ultraviolet lamp module in the light protection unit to avoid ultraviolet radiation.
The application also provides an air cooling temperature control unit for helping the ultraviolet lamp to dissipate heat, and preventing the ultraviolet lamp from working at too high temperature and discharging a small amount of ozone generated in the working process.
The ultraviolet lamp used in the ultraviolet lamp module is preferably an ultra-deep ultraviolet lamp, and has strong irradiation power and long service life.
This application defines H2O2The molar ratio of the addition amount of the Fe-based organic wastewater to the chemical oxygen demand of the organic wastewater is 1-4: 1, and the Fe2+Addition amount of (A) and (B)2O2The molar ratio of the addition amount of (a) is 1: 10-100. Only when the ratio is satisfied, the treatment device for the organic wastewater difficult to degrade has the best effect when treating the organic wastewater.
In order to ensure the degradation effect of the organic wastewater, the organic wastewater treatment device can also adopt another structure, namely a plurality of treatment units are arranged and connected in series, so that the multistage degradation is realized.
The transparent reactor is made of high-pass transparent quartz, and the quartz does not absorb ultraviolet light, so that the ultraviolet light can be completely used for treating organic wastewater, and the utilization rate of the ultraviolet light is improved.
Drawings
FIG. 1 is a schematic structural diagram of a treatment device for refractory organic wastewater in an embodiment of the invention.
List of parts and reference numerals:
1. a transparent reactor; 2. a water storage tank; 3. a metering pump; 4. a dark box; 5. an air cooling temperature control unit; 6. a power source; 7. an exciter; 8. an ultraviolet lamp.
Detailed Description
FIG. 1 is a schematic structural view of a treatment apparatus for refractory organic wastewater according to the present invention.
The treatment device for refractory organic wastewater provided by the embodiment of the invention comprises: the device comprises a processing unit and a metering pump 3, wherein the processing unit comprises a transparent reactor 1 with an annular structure and an ultraviolet lamp module penetrating through the central area of the annular structure, and a water inlet of the transparent reactor 1 is communicated with a water outlet of the metering pump 3; wherein the metering pump 3 is used for pumping the organic wastewater containing the Fenton reagent into the transparent reactor 1; the transparent reactor 1 is used for treating organic wastewater; ultraviolet light emitted by the ultraviolet lamp module uniformly irradiates the organic wastewater through the transparent reactor 1, so that the degradation of the organic wastewater is accelerated.
This application has set up a ring structure's transparent reactor 1, sets up the ultraviolet lamp module in ring structure's central zone, and the best is ring structure's central point and puts for the ultraviolet ray of ultraviolet lamp module outgoing and the organic waste water who contains the fenton reagent in the transparent reactor 1 fully contact, improve the utilization ratio of ultraviolet ray, guarantee the photocatalysis effect, thereby improve the degradation effect of organic waste water.
In order to ensure the degradation effect of the organic wastewater, the device is also provided with a water storage tank 2; a water inlet of the water storage tank 2 is communicated with a water outlet of the transparent reactor 1 and is used for containing the degraded organic wastewater flowing out of the transparent reactor 1; the water inlet of the metering pump 3 is communicated with the water outlet of the water storage tank 2, and the water outlet of the metering pump 3 is communicated with the water inlet of the transparent reactor 1, so that the organic wastewater in the water storage tank 2 is circularly pumped into the transparent reactor 1. This application combines water storage tank 2, measuring pump 3 and processing unit, can realize treating the circulation of degradation organic waste water to same batch, and degradation effect is good, and because the device is simple, so with low costs.
In order to ensure the uniform distribution of the organic wastewater, the organic wastewater is input into the transparent reactor 1 by adopting a tangential flow equal-resistance feeding mode. The method specifically comprises the following steps: a water inlet of the transparent reactor 1 is arranged at the bottom of the side wall of the transparent reactor 1, and a water outlet of the transparent reactor 1 is arranged at the top of the side wall of the transparent reactor 1; the organic wastewater flows from the water inlet of the transparent reactor 1 to the water outlet of the transparent reactor 1 along the annular structure in a rotating way at a set flow rate. Wherein the set flow rate is the flow rate which can enable the organic wastewater to flow from the water inlet of the transparent reactor 1 to the water outlet of the transparent reactor 1 along the annular structure in a rotating way. This application has prescribed a limit to the water inlet of transparent reactor 1 and has set up in the lateral wall top of transparent reactor 1 in the lateral wall bottom of transparent reactor 1 and the delivery port of transparent reactor 1 to make waste water be full of transparent reactor 1, realize the evenly distributed of waste water, simultaneously, because the water inlet sets up in the lateral wall bottom, make the water inlet direction of water inlet and transparent reactor 1's axial vertical, form the tangential flow during intaking, waste water effective distribution in the reactor.
In order to avoid the influence of ultraviolet radiation on external personnel in the degradation process of the organic wastewater, the reactor is also provided with a light protection unit, and the transparent reactor 1 and the ultraviolet lamp module are both arranged in the light protection unit; and the light protection unit is used for blocking the ultraviolet light emitted by the ultraviolet lamp module in the light protection unit. Wherein, the light protection unit comprises a dark box 4 and an observation window (not shown in the figure), and the observation window is a transparent glass window capable of preventing ultraviolet light; the transparent reactor 1 and the ultraviolet lamp module are both arranged in the dark box 4; the observation window is arranged on a camera door (not shown) of the camera chamber 4 and is positioned at the orthographic projection position of the transparent reactor 1, so that the reaction progress condition of the organic wastewater can be observed. The material of camera bellows 4 is stainless steel in this application.
In order to avoid the high temperature in the camera bellows 4, influence the degradation of organic waste water, this application has still been seted up a plurality of through-holes (not shown in the figure) that are used for the heat dissipation on camera bellows 4's lateral wall and roof. In order to further dissipate heat, the air cooling temperature control unit 5 is also arranged; and the air cooling temperature control unit 5 is used for helping the ultraviolet lamp to dissipate heat and preventing the ultraviolet lamp from working at overhigh temperature and discharging a small amount of ozone generated in the working process. The utility model provides an air-cooled accuse temperature unit 5, usable device are radiator fan, open radiator fan, accelerate camera bellows 4 and outside air's circulation to discharge ozone and heat in the camera bellows 4 with higher speed.
The ultraviolet lamp module of the present application comprises a power supply 6, an exciter 7 and an ultraviolet lamp 8; the power supply 6 is connected with the exciter 7 through a cable; the exciter 7 is also connected with the ultraviolet lamp 8 and is used for exciting the ultraviolet lamp 8 to emit ultraviolet light; the uv lamps 8 pass through the central region of the annular structure. Wherein, the ultraviolet lamp 8 is preferably an electrodeless deep ultraviolet lamp; the electric power of a single electrodeless deep ultraviolet lamp is 300-400W, and the spectrum is mainly short wavelength 254nm/185 nm. The non-deep ultraviolet lamp has strong irradiation power and long service life.
The application further defines that the Fenton reagent comprises H2O2And Fe2+In which H is2O2The molar ratio of the addition amount of the Fe-based organic wastewater to the chemical oxygen demand of the organic wastewater is 1-4: 1, and the Fe2+Addition amount of (2) and H2O2The molar ratio of the addition amount of (a) is 1: 10-100. Only when the ratio is satisfied, the treatment device for the organic wastewater difficult to degrade has the best effect when treating the organic wastewater.
In order to ensure the degradation effect of the organic wastewater, the organic wastewater treatment device can also adopt another structure, namely a plurality of treatment units are arranged and connected in series, so that the multistage degradation is realized. The water outlet of the metering pump is connected with the transparent reactor in the first processing unit. A plurality of metering pumps can also be used, each of which is connected to a transparent reactor in one treatment unit for pumping organic waste water containing fenton's reagent into the transparent reactor.
When a plurality of treatment units are used, the treatment units are connected in series, the metering pump pumps the organic wastewater containing the Fenton reagent into the transparent reactor in the first treatment unit, the organic wastewater sequentially enters the transparent reactor in the second treatment unit and the transparent reactor … … in the third treatment unit under the conveying of the metering pump until the organic wastewater is output after reaching the transparent reactor in the last treatment unit, and the organic wastewater after degradation is output by the transparent reactor in the last treatment unit.
When a plurality of processing units are used, in order to further improve the degradation effect of the organic wastewater, the water inlet of the transparent reactor in the first processing unit can be communicated with the water outlet of the metering pump, the water outlet of the transparent reactor in the last processing unit is communicated with the water inlet of the water storage tank, and the water outlet of the water storage tank is communicated with the water inlet of the metering pump, so that the plurality of processing units, the metering pump and the water storage tank form a circulating system to carry out circulating treatment on the organic wastewater.
The transparent reactor 1 of this application's material is the quartz that the high pass is passed through, because quartz does not absorb the ultraviolet light, can make the ultraviolet light all be used for organic waste water's processing, has improved the utilization ratio of ultraviolet light.
The device couples the photocatalysis technology with the Fenton (Fenton) oxidation technology, avoids the defect of a single technology, and effectively improves the photocatalysis efficiency and H2O2Utilization ratio of, reduce Fe2+The dosage of the composite organic carbon treatment agent reduces the generation of iron mud, is suitable for treating various organic wastewater with Chemical Oxygen Demand (COD) less than 5000mg/L, has better pollutant removal effect, and has a Total Organic Carbon (TOC) removal rate of more than 45 percent. The invention is beneficial to promoting the industrialization of the Fenton technology in the field of treatment of organic wastewater difficult to degrade.
The application method of the treatment device for the refractory organic wastewater comprises the following steps:
and 3, when the reaction liquid is discharged to the water storage tank 2, indicating that the transparent reactor 1 is filled with the reaction liquid, closing a door of a light protection system camera shelter, turning on a power supply 6 and starting timing. Of course, the power supply 6 can also be switched on before step 2.
And 4, selecting different retention times to sample in the water storage tank 2, stopping reaction after the reaction is finished, and analyzing the water quality condition of the sample.
The following will describe the effect of the device for treating organic wastewater by photo-Fenton catalytic oxidation of refractory organic wastewater in the present application in treating organic wastewater with specific examples.
The method adopts a TOC-VCPH/CPN analyzer produced by Shimadzu corporation to determine the Total Organic Carbon (TOC) of the wastewater; determining the Chemical Oxygen Demand (COD) of the wastewater by a GB11914-89 potassium dichromate method; and (3) adopting a thunder magnetic PHS-3C precision pH meter to measure the pH value of the water sample.
Example 1
Taking 1L of phenol-containing wastewater, adjusting the pH of the wastewater as shown in Table 1, and adding 1.6 mL/L30% H2O2And 11mg/LFe2+(H2O2And Fe2+The molar ratio of (1) to (80) is 75mL/min, the retention time is 1h, and the removal rate of the effluent TOC can reach 88.6%.
Comparative example 1
The same waste water was treated in a similar manner to example 1, except that Fe was not added2+Equivalent to photocatalytic oxidation reaction, the removal rate of effluent TOC is 3.9%.
Comparative example 2
The same wastewater was treated in a similar manner as in example 1, except that the TOC removal rate of the effluent was 22.6% without turning on the UV lamp, which corresponds to a Fenton oxidation reaction.
Example 2
Taking 1L Guangtai source landfill leachate MVR to discharge water, wherein the water quality condition is as shown in the table1, adjusting the pH of the wastewater to 4.5, and adding 1.15mL/L of 30% H2O2And 32mg/LFe2+(H2O2And Fe2+The molar ratio of (1) to (20) is less than or equal to 1), the flow rate is 75mL/min, the retention time is 1h, and the removal rate of TOC of effluent is 48.5%.
Example 3
Taking 1L of vanillin wastewater, adjusting the pH of the wastewater as shown in Table 1, and adding 4.56mL/L of 30% H2O2And 124mg/LFe2+(H2O2And Fe2+The molar ratio of (1) to (20) is less than or equal to 1), the flow rate is 75mL/min, the retention time is 1h, and the removal rate of TOC of effluent is 48.1%.
Example 4
Taking 1L of printing and dyeing wastewater, adjusting the pH of the wastewater to 5 and adding 0.93mL/L of 30% H according to the water quality condition shown in Table 12O2And 26mg/LFe2+(H2O2And Fe2+The molar ratio of (1) to (20) is less than or equal to 1), the flow rate is 75mL/min, the retention time is 1h, and the removal rate of TOC of effluent is 62.8 percent.
Example 5
1L of coking wastewater is taken, the water quality is shown in Table 1, the pH of the wastewater is not adjusted, and 13.9 mL/L30% H is added2O2And 382mg/LFe2+(H2O2And Fe2+The molar ratio of (1) to (20) is less than or equal to 1), the flow rate is 75mL/min, the retention time is 1h, and the removal rate of TOC of effluent is 56.2%.
TABLE 1 quality of industrial wastewater and treatment results in photo-Fenton apparatus
The device for treating the degradation-resistant organic wastewater by catalytic oxidation couples the photocatalysis technology with the Fenton oxidation technology, and as can be seen from the experimental results of the example 1 and the comparative example 1, the light Fenton technology is compared with the photocatalysis technology, and a small amount of Fe is added2+The photocatalytic efficiency and H can be greatly improved2O2The utilization rate of the method obviously improves the removal effect of pollutants; from example 1 and comparative example 2The experimental result shows that the introduction of ultraviolet light has obvious promotion on the Fenton oxidation technology, the TOC removal rate is improved from 22.6% to 88.6%, however, on the other hand, analysis shows that Fe must be promoted if the pollutant removal effect of the Fenton oxidation technology is ensured2+The addition amount of (A) also proves that the photo-Fenton technology can reduce Fe2+The dosage of the iron mud is reduced, and the advantages of the iron mud are reduced.
As can be seen from the data in Table 1, the treatment device for catalytic oxidation of the refractory organic wastewater has a good pollutant removal effect on various types of wastewater, and the TOC removal rate can reach more than 45%.
Although the present application has been described with reference to a few embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the application as defined by the appended claims.
Claims (10)
1. The treatment device for the refractory organic wastewater is characterized by comprising a treatment unit and a metering pump, wherein the treatment unit comprises a transparent reactor with an annular structure and an ultraviolet lamp module penetrating through the central area of the annular structure, and the water inlet of the transparent reactor is communicated with the water outlet of the metering pump;
the metering pump is used for pumping the organic wastewater containing the Fenton reagent into the transparent reactor;
the transparent reactor is used for treating the organic wastewater;
ultraviolet light emitted by the ultraviolet lamp module penetrates through the transparent reactor and is uniformly irradiated on the organic wastewater, so that the degradation effect of the organic wastewater is improved.
2. The apparatus for treating refractory organic wastewater as defined in claim 1, further comprising a water storage tank;
the water inlet of the water storage tank is communicated with the water outlet of the transparent reactor and is used for containing the degraded organic wastewater flowing out of the transparent reactor;
and the water inlet of the metering pump is communicated with the water outlet of the water storage tank and is used for circularly pumping the organic wastewater in the water storage tank into the transparent reactor.
3. The apparatus for treating refractory organic wastewater as defined in claim 2, wherein the water inlet of the transparent reactor is disposed at the bottom of the sidewall of the transparent reactor, so that the organic wastewater enters the transparent reactor in a tangential flow manner;
the water outlet of the transparent reactor is arranged at the top of the side wall of the transparent reactor;
the organic wastewater flows from the water inlet of the transparent reactor to the water outlet of the transparent reactor along the annular structure in a rotating mode at a set flow speed.
4. The apparatus for treating refractory organic wastewater according to claim 3, further comprising a light protection unit, wherein the transparent reactor and the ultraviolet lamp module are both disposed inside the light protection unit;
and the light protection unit is used for blocking the ultraviolet light emitted by the ultraviolet lamp module in the light protection unit.
5. The apparatus for treating refractory organic wastewater as defined in claim 4, wherein the light protection unit comprises a camera chamber and an observation window;
the transparent reactor and the ultraviolet lamp module are both arranged in the dark box;
the observation window is arranged on a camera bellows door of the camera bellows and is positioned at the orthographic projection position of the transparent reactor;
preferably, the side wall and the top wall of the dark box are also provided with a plurality of through holes for heat dissipation.
6. The apparatus for treating refractory organic wastewater according to claim 5, further comprising an air-cooled temperature control unit disposed in the dark box;
the air cooling temperature control unit is used for helping the ultraviolet lamp to dissipate heat and preventing the ultraviolet lamp from working at an overhigh temperature and discharging a small amount of ozone generated in the working process.
7. The apparatus for treating refractory organic wastewater as defined in claim 1, wherein the ultraviolet lamp module comprises a power supply, an exciter and an ultraviolet lamp;
the power supply is connected with the exciter through a cable;
the exciter is also connected with the ultraviolet lamp and is used for exciting the ultraviolet lamp to emit ultraviolet light;
the ultraviolet lamp passes through the central region of the transparent reactor of the annular structure;
preferably, the ultraviolet lamp is an electrodeless deep ultraviolet lamp;
preferably, the electric power of a single electrodeless deep ultraviolet lamp is 300-400W, and the spectrum is mainly short-wavelength 254nm or 185 nm.
8. The apparatus for treating hardly degradable organic wastewater according to claim 1, wherein the Fenton's reagent comprises H2O2And Fe2+；
Preferably, said H2O2The molar ratio of the addition amount of the Fe to the chemical oxygen demand of the organic wastewater is 1-4: 1, and the Fe2+The amount of addition of (A) and (B) is2O2The molar ratio of the addition amount of (a) is 1: 10-100.
9. The apparatus for treating hardly degradable organic wastewater according to any one of claims 1 to 8, wherein the treatment unit is provided in plurality;
a plurality of the processing units are connected in series.
10. The apparatus for treating refractory organic wastewater as defined in claim 1, wherein the transparent reactor is made of high-permeability quartz.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2173473A1 (en) * | 1993-10-06 | 1995-04-13 | Safe Water Solutions Llc | Uv apparatus for fluid treatment |
| CN201990514U (en) * | 2011-01-24 | 2011-09-28 | 何文涛 | Ultraviolet/Fenton reaction device for removing toxic organic pollutant in water |
| CN204702537U (en) * | 2015-06-07 | 2015-10-14 | 长春黄金研究院 | A kind of UV-light chemical oxidation small test device |
| CN105347552A (en) * | 2015-11-13 | 2016-02-24 | 南京大学盐城环保技术与工程研究院 | Pretreatment method of copper-containing organic waste water |
| CN211310934U (en) * | 2019-11-29 | 2020-08-21 | 厦门大学 | Ultraviolet irradiation system |
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2020
- 2020-10-27 CN CN202011162216.XA patent/CN114477363A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2173473A1 (en) * | 1993-10-06 | 1995-04-13 | Safe Water Solutions Llc | Uv apparatus for fluid treatment |
| CN201990514U (en) * | 2011-01-24 | 2011-09-28 | 何文涛 | Ultraviolet/Fenton reaction device for removing toxic organic pollutant in water |
| CN204702537U (en) * | 2015-06-07 | 2015-10-14 | 长春黄金研究院 | A kind of UV-light chemical oxidation small test device |
| CN105347552A (en) * | 2015-11-13 | 2016-02-24 | 南京大学盐城环保技术与工程研究院 | Pretreatment method of copper-containing organic waste water |
| CN211310934U (en) * | 2019-11-29 | 2020-08-21 | 厦门大学 | Ultraviolet irradiation system |
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