CN117466361B - A high-efficient photocatalytic oxidation equipment for waste water carbon removal attenuation - Google Patents
A high-efficient photocatalytic oxidation equipment for waste water carbon removal attenuation Download PDFInfo
- Publication number
- CN117466361B CN117466361B CN202311626121.2A CN202311626121A CN117466361B CN 117466361 B CN117466361 B CN 117466361B CN 202311626121 A CN202311626121 A CN 202311626121A CN 117466361 B CN117466361 B CN 117466361B
- Authority
- CN
- China
- Prior art keywords
- photoreaction
- chamber
- main reaction
- reaction chamber
- hydrogen peroxide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000002351 wastewater Substances 0.000 title claims abstract description 38
- 230000001699 photocatalysis Effects 0.000 title claims abstract description 35
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 30
- 230000003647 oxidation Effects 0.000 title claims abstract description 29
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 26
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 24
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims abstract description 93
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 84
- 238000006243 chemical reaction Methods 0.000 claims abstract description 54
- 239000011941 photocatalyst Substances 0.000 claims abstract description 27
- 238000010992 reflux Methods 0.000 claims abstract description 27
- 230000003068 static effect Effects 0.000 claims abstract description 26
- 231100000419 toxicity Toxicity 0.000 claims abstract description 20
- 230000001988 toxicity Effects 0.000 claims abstract description 20
- 239000007788 liquid Substances 0.000 claims description 22
- 230000009467 reduction Effects 0.000 claims description 12
- 230000001105 regulatory effect Effects 0.000 claims description 10
- 239000000945 filler Substances 0.000 claims description 7
- 239000010453 quartz Substances 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 5
- 230000005484 gravity Effects 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims description 4
- 238000005452 bending Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 230000001276 controlling effect Effects 0.000 claims description 2
- 238000004064 recycling Methods 0.000 abstract description 5
- 239000003054 catalyst Substances 0.000 description 11
- 238000005516 engineering process Methods 0.000 description 7
- 239000003344 environmental pollutant Substances 0.000 description 6
- 231100000719 pollutant Toxicity 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000002829 reductive effect Effects 0.000 description 5
- 239000011259 mixed solution Substances 0.000 description 4
- 238000012856 packing Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000002957 persistent organic pollutant Substances 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- 238000009303 advanced oxidation process reaction Methods 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000005979 thermal decomposition reaction Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000007059 acute toxicity Effects 0.000 description 1
- 231100000403 acute toxicity Toxicity 0.000 description 1
- 239000003242 anti bacterial agent Substances 0.000 description 1
- 229940088710 antibiotic agent Drugs 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 231100000053 low toxicity Toxicity 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 238000010525 oxidative degradation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 239000011236 particulate material Substances 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 238000007146 photocatalysis Methods 0.000 description 1
- 238000011020 pilot scale process Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 239000003403 water pollutant Substances 0.000 description 1
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
- C02F1/008—Control or steering systems not provided for elsewhere in subclass C02F
-
- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- 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
- C02F1/722—Oxidation by peroxides
-
- 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
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/10—Photocatalysts
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Physical Water Treatments (AREA)
Abstract
The invention discloses high-efficiency photocatalytic oxidation equipment for removing carbon and reducing toxicity from wastewater, which comprises a static mixer, a photoreaction kettle and a series delay photoreaction chamber group which are sequentially connected, wherein a water inlet pipeline is connected to the static mixer, a water outlet pipeline is connected to the series delay photoreaction chamber group, a hydrogen peroxide adding system is arranged on the water inlet pipeline, a reflux system is used for recycling photocatalyst in the series delay photoreaction chamber group and refluxing the photocatalyst into the static mixer, an ultraviolet lamp group is respectively arranged in the photoreaction kettle and the series delay photoreaction chamber group, a main reaction chamber and an outflow chamber which are communicated are arranged in the photoreaction kettle, the main reaction chamber is connected with the static mixer, the outflow chamber is connected with the series delay photoreaction chamber group, and a heat exchange system is connected in the main reaction chamber.
Description
Technical Field
The invention belongs to the technical field of water treatment, and particularly relates to high-efficiency photocatalytic oxidation equipment for wastewater carbon removal and toxicity reduction.
Background
With the rapid development of society, more and more new organic compounds (e.g., new pesticides, antibiotics, etc.) are created and produced. Wherein, part of refractory organic matters are difficult to be completely removed by the traditional water treatment process based on a physical and chemical method, so that the problem of micro-pollution of water environment is increasingly outstanding. In recent years, the problems of new pollutants, biological toxicity of wastewater of sewage plants and the like relating to ecological health and safety of watershed water are gradually valued by the state, for example, the comprehensive emission standard of water pollutants (DB 11/307-2013) in Beijing city and the comprehensive emission standard of wastewater (DB 31/199-2018) in Shanghai city are firstly established with acute toxicity control indexes of wastewater. The advanced oxidation technology (AOP, advanced oxidationprocesses) can directly mine most refractory organic matters into CO 2、H2 O or other low-toxicity biochemical micromolecular substances through the strong oxidability of hydroxyl radicals and the like, and has good technical advantages and application prospects in the aspect of carbon removal and toxicity reduction treatment of trace toxic organic pollutants.
The photocatalytic oxidation technology is one of advanced oxidation technologies, and has been rapidly developed in China in recent years, and has been applied in a small amount at present. The UV/H 2O2 technology using hydrogen peroxide (H 2O2) as an oxidant is the most mature one in the photocatalytic oxidation technology, and the operation cost is mainly influenced by the addition amount of the hydrogen peroxide and the irradiation time of an ultraviolet lamp. Researches prove that the conversion efficiency of H 2O2 to hydroxyl radicals is improved by introducing a catalyst into a UV/H 2O2 system, and the required hydrogen peroxide addition amount and the ultraviolet lamp irradiation time can be reduced, so that the cost is obviously reduced. The catalyst may be classified into a supported type and a suspended type photocatalytic reactor according to the form in which the catalyst exists in the system. The supported photocatalytic reactor, such as application numbers 2011102036892.1 and 201410003174.3, generally loads a certain amount of catalyst on the inner wall of the reactor or the outer wall of the built-in member without considering the problem of catalyst separation and recovery, but has poor mass transfer effect and difficult replacement after the catalyst is deactivated. In the suspension type photocatalytic reactor, the catalyst is suspended in a liquid phase, so that the solid-liquid contact area is large, the mass transfer is good, the reaction rate is high, the replacement and the supplement of the catalyst are convenient, but the catalyst is easy to lose along with the flow of the liquid phase, and the recovery is difficult. With the deepening of the research on photocatalyst production technology and molding technology in recent years, the cost of the superposed catalyst is obviously reduced, and the suspension type photocatalytic reactor is inevitably widely applied in the future. Summarizing, the following technical problems of the existing suspension type photocatalytic reactor still need to be solved: ① Separating and recycling the suspended catalyst; ② The concentration of the organic pollutants in the inlet water is suddenly increased or reduced, so that the hydrogen peroxide is added sufficiently or wasted; ③ The long photo-reaction time causes serious heat accumulation in the reactor, which not only causes the thermal decomposition of partial hydrogen peroxide into O 2 and H 2 O, but also greatly reduces the service life of the ultraviolet lamp tube. Therefore, to at least partially solve the above-mentioned problems, there is a need to develop a novel and efficient photocatalytic oxidation apparatus.
Disclosure of Invention
In order to improve the problems, the invention discloses high-efficiency photocatalytic oxidation equipment for removing carbon and reducing toxicity of wastewater, which comprises a static mixer, a photoreaction kettle and a series delay photoreaction chamber group which are sequentially connected, wherein a water inlet pipeline is connected to the static mixer, a water outlet pipeline is connected to the series delay photoreaction chamber group, a hydrogen peroxide adding system is arranged on the water inlet pipeline, a reflux system is used for recycling photocatalyst in the series delay photoreaction chamber group and refluxing the photocatalyst to the static mixer, an ultraviolet lamp group is respectively arranged in the photoreaction kettle and the series delay photoreaction chamber group, a main reaction chamber and an outflow chamber which are communicated are arranged in the photoreaction kettle are connected with the static mixer, the outflow chamber is connected with the series delay photoreaction chamber group, and a heat exchange system is connected in the main reaction chamber.
Preferably, the ultraviolet lamp group comprises a plurality of ultraviolet lamp tubes which are arranged in a straight strip shape and are arranged in a quartz protective sleeve, and the quartz protective sleeve is uniformly arranged in the photoreaction kettle and the series delay photoreaction chamber group and is fixed through an upper grid plate and a lower grid plate.
Preferably, the series delay photo-reaction chamber group is formed by serially combining a plurality of photo-reaction chambers in the hydraulic direction, folded plates are arranged at positions, close to the bottoms, of the photo-reaction chambers, photo-catalysts are settled on the folded plates under the action of gravity and fall into the bottoms of the photo-reaction chambers, drain valves are arranged at the bottoms of the photo-reaction chambers, a reflux system is used for collecting the photo-catalysts falling into the bottoms of the photo-reaction chambers to form reflux turbid liquid, a packing layer is arranged above the folded plates of the photo-reaction chambers of the last stage, and the packing layer is filled with packing materials, so that effluent can be filtered to prevent loss of the photo-catalysts.
Preferably, the method further comprises:
And the electric control system is arranged in the photoreaction chamber of the last stage, the hydrogen peroxide feeding system is arranged on the water inlet pipeline through a feeding pipeline with an electric regulating valve, and the electric regulating valve, the drain valve, the hydrogen peroxide concentration analyzer and the ultraviolet lamp set are all connected with the electric control system.
Preferably, the wastewater from the water inlet pipeline, the hydrogen peroxide from the hydrogen peroxide adding system and the reflux turbid liquid from the reflux system enter and are uniformly mixed by a static mixer to form mixed liquid, the mixed liquid flows in from the upper part of the main reaction chamber, flows into the series delay photoreaction chamber group from the upper part of the outflow chamber, and flows out from the upper part of the photoreaction chamber of the last stage through the water outlet pipeline after being folded back in an upper and lower stages in a push flow state.
Preferably, the heat exchange system is used for regulating and controlling the average temperature in the main reaction chamber to be 30-50 ℃.
Preferably, the photocatalyst is solid particulate matter having a particle size of 50-2000 microns.
Preferably, the bottom of the photoreaction kettle is provided with a stirring device.
Preferably, the main reaction chamber and the outflow chamber are separated by a vertical plate, and a lower outflow port is reserved at the bottom end of the vertical plate.
Preferably, the method further comprises:
The water distribution pipeline is characterized in that one end of the water distribution pipeline is connected to the outlet end of the static mixer, the other end of the water distribution pipeline extends into the main reaction chamber and is positioned at the upper part of the main reaction chamber, six water distribution branch pipes are positioned in the main reaction chamber and are symmetrically arranged on the water distribution pipeline in a group of three, three and one, water outlets are formed in the water distribution branch pipes at equal intervals, the water distribution branch pipes are arranged in a upward bending mode close to the water distribution pipeline end, the water outlet assembly consists of a water outlet nozzle and a thread section, and the thread section is connected to the water outlet in a threaded mode.
Compared with the prior art, the invention at least comprises the following beneficial effects:
(1) The invention discloses high-efficiency photocatalytic oxidation equipment for wastewater carbon removal and toxicity reduction, wherein a multistage folded plate is arranged in a series delay photoreaction chamber group, and a reflux system is connected to the series delay photoreaction chamber group, so that the high-efficiency recycling of suspended photocatalyst is realized; the packing layer is arranged in the final-stage photoreaction chamber, so that the effluent can be filtered, and the loss of the photocatalyst is further prevented.
(2) The invention discloses high-efficiency photocatalytic oxidation equipment for wastewater carbon removal and toxicity reduction, wherein oxidation reactions sequentially occur in three areas of a static mixer, a photoreaction kettle and a series-delay photoreaction chamber group, and the staged oxidative degradation of pollutants which are easy to directly oxidize, photocatalytic to oxidize and difficult to photocatalytic to oxidize can be respectively realized. Through setting up series delay photo reaction room group, waste water flows in multistage photo reaction room with plug flow form, has prolonged photo reaction time for pollutant concentration reduces step by step, can guarantee out water quality up to standard, and can realize the high-efficient utilization of remaining hydrogen peroxide in the waste water.
(3) The invention discloses high-efficiency photocatalytic oxidation equipment for wastewater carbon removal and toxicity reduction, wherein a hydrogen peroxide concentration analyzer is arranged in a final-stage photoreaction chamber, and an electric control system is utilized to automatically regulate and control the addition rate of hydrogen peroxide, so that the basically positive correlation between the addition amount of the hydrogen peroxide and the concentration of organic pollutants in water is realized, and the serious condition of insufficient or excessive hydrogen peroxide addition is avoided.
(4) The invention discloses high-efficiency photocatalytic oxidation equipment for wastewater carbon removal and toxicity reduction, wherein a heat exchange system is arranged in a photoreaction kettle with dense ultraviolet lamp tubes, so that the average temperature of a reaction system can be maintained between 30 and 50 ℃, the service life of the ultraviolet lamp tubes is prevented from being greatly shortened due to serious accumulated heat, the thermal decomposition of hydrogen peroxide can be restrained, and the effective utilization rate of the hydrogen peroxide is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the front view of the high-efficiency photocatalytic oxidation device for wastewater carbon removal and toxicity reduction;
FIG. 2 is a schematic top view of the high efficiency photocatalytic oxidation apparatus for wastewater carbon removal and attenuation according to the present invention;
FIG. 3 is an outline view of a water outlet assembly of the high-efficiency photocatalytic oxidation device for removing carbon and reducing toxicity from wastewater.
In the figure: 1.a static mixer; 2. a light reaction kettle; 3. a series delay light reaction chamber group; 4. a hydrogen peroxide dosing system; 5. a heat exchange system; 6. a reflow system; 7. an electric control system; 8. a hydrogen peroxide concentration analyzer; 9. an ultraviolet lamp set; 101. a water distribution pipeline; 102. a water distribution branch pipe; 103. a water outlet assembly; 104. a water outlet nozzle; 105. a threaded section; 201. a main reaction chamber; 202. a discharge chamber; 203. a vertical plate; 204. and a lower outflow port.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
The invention will be further described with reference to the accompanying drawings.
As shown in fig. 1 to 3, the efficient photocatalytic oxidation device for removing carbon and reducing toxicity from wastewater provided in this embodiment includes a static mixer 1, a photoreaction kettle 2 and a series delay photoreaction chamber group 3 which are sequentially connected, a water inlet pipeline is connected to the static mixer 1, a water outlet pipeline is connected to the series delay photoreaction chamber group 3, a hydrogen peroxide adding system 4 is installed on the water inlet pipeline, a reflux system 6 is used for recovering a photocatalyst in the series delay photoreaction chamber group 3 and reflowing the photocatalyst to the static mixer 1, an ultraviolet lamp group 9 is respectively installed in the photoreaction kettle 2 and the series delay photoreaction chamber group 3, a main reaction chamber 201 and an outflow chamber 202 which are communicated are arranged in the photoreaction kettle 2, the main reaction chamber 201 is connected with the static mixer 1, the outflow chamber 202 is connected with the series delay photoreaction chamber group 3, and a heat exchange system 5 is connected in the main reaction chamber 201.
The working principle and beneficial effects of the technical scheme are as follows:
The invention provides high-efficiency photocatalytic oxidation equipment for wastewater carbon removal and toxicity reduction, which comprises the following steps of: the wastewater from the water inlet pipeline, the hydrogen peroxide from the hydrogen peroxide adding system 4 and the reflux turbid liquid from the reflux system 6 are uniformly mixed in the static mixer 1, and the easily oxidized pollutants in the wastewater are directly oxidized by the hydrogen peroxide. The mixed solution enters from the upper part of the main reaction chamber 201 of the photoreaction kettle 2, flows from top to bottom in the main reaction chamber 201, and is converted into hydroxyl free radicals through ultraviolet irradiation and photocatalysis by the photocatalyst, so that the pollutants easy to be subjected to photocatalytic oxidation are rapidly oxidized and degraded. At the lower part of the main reaction chamber 201, the mixed solution is transferred into the outflow chamber 202 of the photoreaction kettle 2 and flows from bottom to top, and finally flows into the series delay photoreaction chamber group 3 at the upper part of the outflow chamber 202. In the series delay photoreaction chamber group 3, the mixed solution flows in a plug flow mode and is folded back up and down in multiple stages, wherein the pollutants which are difficult to be subjected to photocatalytic oxidation are further oxidized and degraded, the residual hydrogen peroxide is also effectively consumed and utilized, and the photocatalyst is settled on a folded plate under the action of gravity and is separated from the wastewater. Finally, the treated water is filtered by the filler layer and is discharged through the water outlet pipeline.
In one embodiment, the ultraviolet lamp set 9 comprises a plurality of ultraviolet lamp tubes, the ultraviolet lamp tubes are arranged in a straight strip shape and are arranged in a quartz protection sleeve, and the quartz protection sleeve is uniformly arranged in the photoreaction kettle 2 and the series delay photoreaction chamber set 3 and is fixed through an upper grating plate and a lower grating plate.
In one embodiment, the series delay photoreaction chamber group 3 is formed by serially combining a plurality of photoreaction chambers along the hydraulic direction, a folded plate is arranged in each photoreaction chamber near the bottom, the photocatalyst is settled on the folded plate under the action of gravity and then falls into the bottom of each photoreaction chamber, a drain valve is arranged at the bottom of each photoreaction chamber, a reflux system 6 is used for collecting the photocatalyst falling into the bottom of each photoreaction chamber to form reflux turbid liquid, a filler layer is arranged above the folded plate of the photoreaction chamber of the last stage, the filler layer is filled with filler, and the effluent can be filtered to prevent the loss of the photocatalyst.
The working principle and beneficial effects of the technical scheme are as follows:
In the series-delay photo-reaction chamber group 3, the photo-catalyst in the mixed solution is settled on the folded plate under the action of gravity, and then falls into the bottom of each photo-reaction chamber. Under the control of the electric control system 7, the drain valves at the bottoms of the photoreaction chambers are opened at regular time, the photocatalyst and part of wastewater are discharged into a reflux tank of the reflux system 6 at regular time to form reflux turbid liquid, and finally the reflux turbid liquid, the wastewater and hydrogen peroxide enter the photoreaction kettle 2 again after being mixed in the static mixer 1 through a reflux pipeline, so that the recycling is realized.
In one embodiment, further comprising:
The electric control system 7 is provided with a hydrogen peroxide concentration analyzer 8 in the final-stage photoreaction chamber, the hydrogen peroxide adding system 4 is arranged on a water inlet pipeline through an adding pipeline with a power regulating valve, and the electric regulating valve, the drain valve, the hydrogen peroxide concentration analyzer 8 and the ultraviolet lamp set 9 are all connected with the electric control system 7.
The working principle and beneficial effects of the technical scheme are as follows:
The hydrogen peroxide adding system 4 is provided with an electric regulating valve, and the adding rate of the hydrogen peroxide can be controlled by regulating the opening of the valve. And a hydrogen peroxide concentration analyzer 8 is arranged near the water outlet of the series delay light reaction chamber group 3 and is used for measuring the hydrogen peroxide content in the water. The electric control system 7 is connected with the electric control valve and the hydrogen peroxide concentration analyzer. When the hydrogen peroxide concentration analyzer 8 detects that the content of the aqueous hydrogen peroxide exceeds a set upper limit value, a feedback signal is sent to the electric control system 7 and an electric control valve is further controlled, so that the adding rate of the hydrogen peroxide is reduced; when the hydrogen peroxide content is lower than the set lower limit value, a feedback signal is also sent to the electric control system 7 and the electric control valve is further controlled, so that the hydrogen peroxide adding rate is increased.
In one embodiment, the three components of the wastewater from the water inlet pipeline, the hydrogen peroxide from the hydrogen peroxide adding system 4 and the reflux turbid liquid from the reflux system 6 are mixed uniformly by the static mixer 1 to form a mixed liquid, the mixed liquid flows in from the upper part of the main reaction chamber 201 and flows in the series delay photo-reaction chamber group 3 from the upper part of the outflow chamber 202, and after being folded back in an upper and lower multistage manner in a push flow state, the mixed liquid flows out from the upper part of the photo-reaction chamber of the last stage through the water outlet pipeline.
In one embodiment, the heat exchange system 5 is used to regulate the average temperature within the main reaction chamber 201 between 30-50 ℃.
In one embodiment, the photocatalyst is a solid particulate material having a particle size of 50-2000 microns.
In one embodiment, the bottom of the photoreaction kettle 2 is provided with a stirring device.
In one embodiment, the main reaction chamber 201 and the outflow chamber 202 are separated by a riser 203, and a lower outflow port 204 is left at the bottom end of the riser 203.
In one embodiment, further comprising:
The water distribution pipeline 101, one end of the water distribution pipeline 101 is connected to the outlet end of the static mixer 1, the other end of the water distribution pipeline 101 stretches into the main reaction chamber 201 and is positioned at the upper part of the main reaction chamber 201, six water distribution branch pipes 102 are positioned in the main reaction chamber 201, three groups of water distribution branch pipes 102 are symmetrically arranged on the water distribution pipeline 101, water outlets are formed in the water distribution branch pipes 102 at equal intervals, the water distribution branch pipes 102 are arranged in a upward bending mode close to the end of the water distribution pipeline 101, the water outlet assembly 103 consists of a water outlet nozzle 104 and a threaded section 105, and the threaded section 105 is in threaded connection with the water outlets.
The working principle and beneficial effects of the technical scheme are as follows:
The mixed liquid enters from the upper part of the main reaction chamber 201 of the photoreaction kettle 2 through the water distribution pipeline 101 and is discharged from the water distribution branch pipe 102 connected with the water distribution pipeline 101, the mixed liquid is discharged through the mixed liquid, the water outlet assembly 103 consists of a water outlet nozzle 104 and a thread section 105, the water outlet assembly 103 is detachably arranged on a water outlet by the thread section 105, and the mixed liquid is discharged by the water outlet nozzle 104.
Example 2
The high-efficiency photocatalytic oxidation equipment for removing carbon and reducing toxicity of the wastewater shown in the embodiment 1 is adopted to perform pilot-scale treatment on effluent after activated carbon adsorption of dye wastewater of a certain dye enterprise in the Lianggang city of Jiangsu province. The COD value of the test wastewater is about 2400mg/L and the TOC is about 480-500mg/L. The treatment process adopts continuous water inflow, and the effect is shown in the following table.
| Reaction time (h) | TOC of inflow (mg/L) | Effluent TOC (mg/L) | TOC removal rate |
| 2 | 497 | 38.2 | 92.3％ |
| 4 | 485 | 36.6 | 92.5％ |
| 6 | 490 | 37.5 | 92.3％ |
| 8 | 491 | 34.2 | 93.0％ |
| 10 | 496 | 35.5 | 92.8％ |
The results show that the TOC removal rate of the device to the test wastewater reaches 90% -95%, and the device has a good carbon removal effect.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.
Claims (7)
1. A high-efficiency photocatalytic oxidation device for wastewater carbon removal and toxicity reduction is characterized by comprising a static mixer (1), a photoreaction kettle (2) and a series delay photoreaction chamber group (3) which are sequentially connected, wherein a water inlet pipeline is connected to the static mixer (1), a water outlet pipeline is connected to the series delay photoreaction chamber group (3), a hydrogen peroxide adding system (4) is arranged on the water inlet pipeline, a reflux system (6) is used for recovering a photocatalyst in the series delay photoreaction chamber group (3) and refluxing the photocatalyst into the static mixer (1), an ultraviolet lamp group (9) is respectively arranged in the photoreaction kettle (2) and the series delay photoreaction chamber group (3), a main reaction chamber (201) and an outflow chamber (202) which are communicated are arranged in the photoreaction kettle (2), the main reaction chamber (201) is connected with a static mixer (1), the outflow chamber (202) is connected with a series delay photoreaction chamber group (3), a heat exchange system (5) is connected in the main reaction chamber (201), an ultraviolet lamp group (9) comprises a plurality of ultraviolet lamp tubes which are arranged in a straight strip shape and are arranged in quartz protective sleeves, the quartz protective sleeves are uniformly arranged in the photoreaction kettle (2) and the series delay photoreaction chamber group (3) and are fixed through an upper grating plate and a lower grating plate, the main reaction chamber (201) and the outflow chamber (202) are separated through a riser (203), a lower outflow port (204) is reserved at the bottom end of the vertical plate (203);
Further comprises:
The device comprises a water distribution pipeline (101), wherein one end of the water distribution pipeline (101) is connected to the outlet end of a static mixer (1), the other end of the water distribution pipeline (101) stretches into a main reaction chamber (201) and is positioned at the upper part of the main reaction chamber (201), six water distribution branch pipes (102) are positioned in the main reaction chamber (201) and are symmetrically arranged on the water distribution pipeline (101), water outlets are formed in the water distribution branch pipes (102) at equal intervals, the water distribution branch pipes (102) are arranged in a lifting bending mode close to the end of the water distribution pipeline (101), a water outlet assembly (103) consists of a water outlet nozzle (104) and a threaded section (105), and the threaded section (105) is in threaded connection with the water outlets.
2. The efficient photocatalytic oxidation device for removing carbon and reducing toxicity from wastewater according to claim 1, wherein the series-delay photoreaction chamber group (3) is formed by serially combining a plurality of photoreaction chambers in a hydraulic direction, folded plates are arranged in the photoreaction chambers close to the bottoms, the photocatalyst is settled on the folded plates under the action of gravity and falls into the bottoms of the photoreaction chambers, a drain valve is arranged at the bottoms of the photoreaction chambers, a reflux system (6) is used for collecting the photocatalyst falling into the bottoms of the photoreaction chambers to form reflux turbid liquid, a filler layer is arranged above the folded plates of the photoreaction chambers of the last stage, and filler is filled in the filler layer to filter the effluent so as to prevent loss of the photocatalyst.
3. A high efficiency photocatalytic oxidation device for carbon removal and attenuation of waste water according to claim 1, further comprising:
The electric control system (7), the hydrogen peroxide concentration analyzer (8) is installed in the photoreaction chamber of the last stage, the hydrogen peroxide adding system (4) is installed on the water inlet pipeline through an adding pipeline with a power-driven regulating valve, and the electric regulating valve, the drain valve, the hydrogen peroxide concentration analyzer (8) and the ultraviolet lamp set (9) are all connected with the electric control system (7).
4. The efficient photocatalytic oxidation device for carbon removal and toxicity reduction of wastewater according to claim 2, wherein the wastewater from the water inlet pipeline, the hydrogen peroxide from the hydrogen peroxide adding system (4) and the reflux turbid liquid from the reflux system (6) enter and are uniformly mixed by the static mixer (1) to form a mixed liquid, the mixed liquid flows in from the upper part of the main reaction chamber (201) and flows in the series delay photoreaction chamber group (3) from the upper part of the outflow chamber (202), and after being folded back by upper and lower stages in a push-flow state, the mixed liquid flows out from the upper part of the photoreaction chamber of the last stage through the water outlet pipeline.
5. The efficient photocatalytic oxidation equipment for carbon removal and toxicity reduction of wastewater according to claim 1, wherein the heat exchange system (5) is used for regulating and controlling the average temperature in the main reaction chamber (201) to be 30-50 ℃.
6. The high-efficiency photocatalytic oxidation equipment for removing carbon and reducing toxicity from wastewater according to claim 2, wherein the photocatalyst is solid particles with a particle size of 50-2000 microns.
7. The efficient photocatalytic oxidation equipment for wastewater carbon removal and toxicity reduction according to claim 1, wherein a stirring device is arranged at the bottom of the photoreaction kettle (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311626121.2A CN117466361B (en) | 2023-11-30 | 2023-11-30 | A high-efficient photocatalytic oxidation equipment for waste water carbon removal attenuation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311626121.2A CN117466361B (en) | 2023-11-30 | 2023-11-30 | A high-efficient photocatalytic oxidation equipment for waste water carbon removal attenuation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117466361A CN117466361A (en) | 2024-01-30 |
| CN117466361B true CN117466361B (en) | 2024-07-16 |
Family
ID=89627570
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311626121.2A Active CN117466361B (en) | 2023-11-30 | 2023-11-30 | A high-efficient photocatalytic oxidation equipment for waste water carbon removal attenuation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117466361B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103265139A (en) * | 2013-06-06 | 2013-08-28 | 西安建筑科技大学 | Method and device for quickly treating alcohol-containing wastewater of gas field |
| CN207375791U (en) * | 2017-04-13 | 2018-05-18 | 深圳泰和环保科技有限公司 | Thin layer waste water photochemical catalytic oxidation system |
| CN111704197A (en) * | 2020-06-24 | 2020-09-25 | 中国恩菲工程技术有限公司 | Multi-chamber photocatalysis-circulating fluidized bed device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3790950B2 (en) * | 1999-03-26 | 2006-06-28 | 株式会社荏原製作所 | Method for producing photocatalyst with good sedimentation and water purification method |
| KR200249122Y1 (en) * | 2001-07-03 | 2001-10-19 | 고명한 | Photo-catalystic Reactor Applied by fluidization |
| CN202766327U (en) * | 2012-07-19 | 2013-03-06 | 湖南先科环保有限公司 | High-efficiency recyclable photocatalysis industrial wastewater treatment device |
| CN102942283B (en) * | 2012-10-25 | 2014-10-29 | 江苏大学 | Magneto-optical sewage treatment apparatus |
-
2023
- 2023-11-30 CN CN202311626121.2A patent/CN117466361B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103265139A (en) * | 2013-06-06 | 2013-08-28 | 西安建筑科技大学 | Method and device for quickly treating alcohol-containing wastewater of gas field |
| CN207375791U (en) * | 2017-04-13 | 2018-05-18 | 深圳泰和环保科技有限公司 | Thin layer waste water photochemical catalytic oxidation system |
| CN111704197A (en) * | 2020-06-24 | 2020-09-25 | 中国恩菲工程技术有限公司 | Multi-chamber photocatalysis-circulating fluidized bed device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN117466361A (en) | 2024-01-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102260003A (en) | Microwave electrodeless ultraviolet photocatalysis-double membrane separation coupled treatment device for industrial wastewater | |
| WO2018228080A1 (en) | Skid-mounted device of upper-spreading in-diffusion vertical pushing photocatalytic wastewater treatment | |
| CN103288295A (en) | Water treatment method and water treatment system | |
| CN203144227U (en) | Integrated device for multi-level oxidation treatment of refractory wastewater | |
| CN209652056U (en) | Ozone coupling CO catalytic oxidation D reaction unit | |
| CN102701544B (en) | External-mounting photocatalytic - biological fluidized bed reactor | |
| CN206188552U (en) | Oil field wastewater treatment device | |
| CN1057281C (en) | High-effect anaerobic treatment device for waste water and method thereof | |
| CN213357052U (en) | Ozone catalytic fluidized bed device for sewage treatment | |
| CN117466361B (en) | A high-efficient photocatalytic oxidation equipment for waste water carbon removal attenuation | |
| CN108033558A (en) | Strengthen the method for dyeing waste water hydrolysis acidification performance | |
| CN105152494A (en) | Method and device for treating wastewater of printing and dyeing industry | |
| CN205035148U (en) | Circulation anaerobism miniaturation reaction processing apparatus is led to heterogeneous intensive branch | |
| CN209242868U (en) | A kind of combined system handling dyeing waste water | |
| CN204727707U (en) | Based on the co-oxidation waste disposal plant of multistage fluidized bed | |
| CN217757085U (en) | Tertiary reaction treatment coke quenching effluent plant | |
| CN216472454U (en) | Step steady flow type anaerobic reaction system | |
| CN102491566B (en) | Multiphase catalytic oxidation sewage treatment method | |
| CN213231883U (en) | Device for treating wastewater based on physical adsorption coupling photo-Fenton oxidation technology | |
| CN212559635U (en) | Hybrid membrane biological anaerobic fermentation reactor for kitchen wastewater | |
| CN208218511U (en) | The processing unit of high-concentration sewage | |
| CN105060391A (en) | Outer circulation photocatalysis hydrocyclone membrane separation coupling reactor for treating organic wastewater | |
| CN208104026U (en) | Anaerobic baffled reactor | |
| CN106673123B (en) | Reactor and its operation process are repaired in integrated oil sewage photocatalysis | |
| CN219297261U (en) | High-efficient ozone catalytic oxidation effluent treatment plant |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |