CN116854204A - Method for degrading COD by reverse osmosis concentrated water and electrocatalytic oxidation device thereof - Google Patents
Method for degrading COD by reverse osmosis concentrated water and electrocatalytic oxidation device thereof Download PDFInfo
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- CN116854204A CN116854204A CN202310881305.7A CN202310881305A CN116854204A CN 116854204 A CN116854204 A CN 116854204A CN 202310881305 A CN202310881305 A CN 202310881305A CN 116854204 A CN116854204 A CN 116854204A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 102
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 42
- 230000003647 oxidation Effects 0.000 title claims abstract description 41
- 238000001223 reverse osmosis Methods 0.000 title claims abstract description 32
- 230000000593 degrading effect Effects 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000010865 sewage Substances 0.000 claims abstract description 13
- 238000007599 discharging Methods 0.000 claims abstract description 6
- 208000028659 discharge Diseases 0.000 claims description 14
- 239000002893 slag Substances 0.000 claims description 11
- 239000002351 wastewater Substances 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 6
- 229910052760 oxygen Inorganic materials 0.000 claims description 6
- 239000001301 oxygen Substances 0.000 claims description 6
- 239000007789 gas Substances 0.000 claims description 5
- 239000012535 impurity Substances 0.000 claims description 5
- 238000009826 distribution Methods 0.000 claims description 4
- 239000003344 environmental pollutant Substances 0.000 claims description 4
- 231100000719 pollutant Toxicity 0.000 claims description 4
- 231100000331 toxic Toxicity 0.000 claims description 4
- 230000002588 toxic effect Effects 0.000 claims description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 3
- 238000009825 accumulation Methods 0.000 claims description 3
- 230000000712 assembly Effects 0.000 claims description 3
- 238000000429 assembly Methods 0.000 claims description 3
- 230000003197 catalytic effect Effects 0.000 claims description 3
- 238000005868 electrolysis reaction Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000011159 matrix material Substances 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 229910052719 titanium Inorganic materials 0.000 claims description 3
- 239000010936 titanium Substances 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims 3
- 239000013049 sediment Substances 0.000 claims 2
- 241000220317 Rosa Species 0.000 claims 1
- 230000002146 bilateral effect Effects 0.000 claims 1
- 150000003839 salts Chemical class 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 238000004065 wastewater treatment Methods 0.000 abstract description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 16
- 238000005192 partition Methods 0.000 description 11
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 6
- 238000001179 sorption measurement Methods 0.000 description 6
- 239000012528 membrane Substances 0.000 description 5
- 238000011084 recovery Methods 0.000 description 5
- 150000002500 ions Chemical class 0.000 description 4
- 238000004064 recycling Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 230000005611 electricity Effects 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 241001233242 Lontra Species 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000002306 biochemical method Methods 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000008235 industrial water Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
- C02F1/4672—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation
-
- 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
- C02F2201/46—Apparatus for electrochemical processes
- C02F2201/461—Electrolysis apparatus
- C02F2201/46105—Details relating to the electrolytic devices
- C02F2201/4618—Supplying or removing reactants or electrolyte
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General 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)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The invention relates to the technical field of wastewater treatment, in particular to a method for degrading COD by reverse osmosis and reverse osmosis concentrated water and an electrocatalytic oxidation device thereof, wherein the electrocatalytic oxidation device comprises a frame, an electrocatalytic component and a sewage discharging device, and has the beneficial effects that: the COD in the reverse osmosis concentrated water is removed by adopting the electrocatalytic oxidation device, so that the COD value of the reverse osmosis concentrated water is reduced to the discharge standard limit value and then discharged, after the raw water is subjected to reverse osmosis concentration, the salt content in the concentrated water (reverse osmosis concentrated water) is increased, and the efficiency of other types of advanced oxidation devices is influenced because the ion content in the water is increased.
Description
Technical Field
The invention relates to the technical field of wastewater treatment, in particular to a method for degrading COD (chemical oxygen demand) by reverse osmosis concentrated water and an electrocatalytic oxidation device thereof.
Background
The industrial water has to be recycled in a membrane concentration mode, and the water after membrane concentration is divided into two parts, namely produced water and reverse osmosis concentrated water, and the produced water is industrial production water and the reverse osmosis concentrated water is discharged.
The sewage discharge standard is continuously improved, and the COD content of the membrane reuse water in the reverse osmosis concentrated water generated in the concentration and desalination process is high, so that the requirement of direct discharge cannot be met. Because COD index in reverse osmosis concentrated water exceeds standard, the membrane produced water recycling rate is reduced for some raw water which is first-grade A discharged water in GB18918-2002 and even water with higher COD content in raw water, the method mainly aims at recycling sewage in petrochemical plants, biochemical methods are adopted for sewage treatment, COD in water after biochemical treatment is below 40-50mg/L, and COD discharge requirement is below 50mg/L according to first-grade A discharge standard requirement in national standard GB18918-2002, so that the recycling rate of membrane recycling is severely limited.
In the prior art, in order to reduce COD (chemical oxygen demand), the sewage is treated by adopting the adsorption of activated carbon or the oxidation of ozone, the activated carbon is in a powder adding mode or a filter adsorption mode, the operation cost is increased by adding the powder activated carbon, the quality of the sludge is increased, and the adsorption efficiency is very low; the activated carbon filter needs to be replaced regularly, or a regeneration device is added to periodically recover the activity of the activated carbon, the capacity of the activated carbon for adsorbing COD is limited, the initial adsorption quantity of the activated carbon is only 10-20mg/L, and the capacity of the activated carbon for middle-stage and later-stage adsorption along with the adsorption saturation is less. The investment and the operation cost of the advanced ozone oxidation device are high, and the advanced ozone oxidation device is greatly influenced by certain ions in reverse osmosis concentrated water, for example, the ions of halogen elements can influence the ozone oxidation efficiency, and the efficiency is low.
Disclosure of Invention
The invention aims to provide a method for degrading COD by reverse osmosis and reverse osmosis concentrated water and an electrocatalytic oxidation device thereof, which are used for solving the problems in the prior art.
In order to achieve the above purpose, the present invention provides the following technical solutions:
an electrocatalytic oxidation device for reverse osmosis concentrate water degradation of COD, the electrocatalytic oxidation device comprising:
the device comprises a rack, wherein a treatment box is arranged on the rack, a power supply box is arranged on one side of the rack, a pair of exhaust assemblies are arranged at the upper end of the treatment box, a water inlet pipe is arranged on one side of the treatment box, which is close to the power supply box, a water outlet is arranged on the other side of the treatment box, and a supporting cross beam is transversely arranged at the lower end of the rack;
the electrocatalytic component is arranged in the inner cavity of the treatment box and comprises a pair of end plates, electrode groups and turning partition plates which are distributed left and right, one side bolt of each end plate is arranged on the inner wall of the treatment box, one opposite side of each end plate is fixedly connected through four groups of mounting rods which are distributed in a matrix, four groups of electrode groups and turning partition plates are arranged on the mounting rods at intervals, the turning partition plates are arranged between the adjacent electrode groups, a double-layer filter screen penetrating left and right is arranged on the turning partition plates, the electrode groups are composed of five polar plates which are arranged on the mounting rods at intervals, anode columns and cathode columns which are distributed in a front-back staggered mode are respectively arranged at the upper ends of the adjacent pair of polar plates, and the anode columns and the cathode columns are respectively electrically connected with the anode and the cathode of the power supply box;
the sewage disposal device is arranged in the electrode group, the sewage disposal device corresponds to the electrode group one by one, the sewage disposal device comprises a lower extension pipe, a vertical pipe and a semicircular ring pipe, an inclined launder corresponding to the electrode group one by one is arranged on the inner wall of the lower end of the treatment box, the semicircular ring pipe is fixed on the frame, ports on two sides of the upper end of the semicircular ring pipe are all extended into the inclined launder, the ports on two sides of the upper end of the semicircular ring pipe are respectively connected with the vertical pipe and a one-way slag discharging valve, a lower extension pipe is vertically arranged in the middle of the lower end of the semicircular ring pipe, a second piston is arranged in the lower extension pipe in an elastic mode, a pair of lateral openings which transversely penetrate through are formed in the side wall of the lower extension pipe, the second piston is located at the upper end of the lateral opening, a circular ring screen is arranged at the upper end of the vertical pipe, a folding air bag which is externally connected with an air pump is arranged at the upper end of the circular ring screen, and the lower end of the folding air bag is provided with a first piston which is in sliding connection with the vertical pipe.
Preferably, one side of the treatment box, which is close to the water inlet pipe, is provided with a primary filter box, the water inlet pipe is communicated with an inner cavity at the upper end of the primary filter box, a circular filter screen pipe which is transversely distributed is arranged in the primary filter box, and a flowmeter is arranged on the water inlet pipe.
Preferably, the rear side of the circular filter screen tube is provided with a connecting port positioned on the primary filter tank, the outer side of the connecting port is connected with a connecting pipe, the side wall of the rear side of the frame is provided with a water pump, the water pump is communicated with an electrocatalytic component in the inner cavity of the treatment tank, and the other end of the water pump is communicated with the hollow inner cavity of the circular filter screen tube through the connecting pipe.
Preferably, slots are formed in positions, corresponding to the steering partition plates, of the front inner wall and the rear inner wall of the treatment box, a first plugboard and a second plugboard which are matched with the slots and are spliced are respectively arranged on the front side and the rear side of the steering partition plates, the first plugboard is fixedly arranged on the double-layer filter screen, and the double-layer filter screens on the adjacent steering partition plates are distributed in a front-back staggered mode.
Preferably, a pair of bases which are bilaterally symmetrical is arranged at the lower end of the frame, a recovery box is arranged on the base, two ends of the supporting beam are fixed on the base, inclined connecting pipes which extend obliquely towards the outside of the lateral opening are connected, inclined connecting pipes at the lower ends of the plurality of groups of linearly distributed sewage disposal devices are connected to the collecting pipes, and the end parts of the collecting pipes are communicated with the recovery box.
Preferably, a second piston is slidably mounted in the lower extension pipe, a lifting inserting rod is vertically arranged at the lower end of the second piston, the lower end of the lifting inserting rod penetrates through the supporting cross beam in a sliding mode, a spring is vertically sleeved on the lifting inserting rod, and the upper end and the lower end of the spring are respectively propped between the second piston and the supporting cross beam.
Preferably, the upper end of the vertical pipe extends to the same height as the upper end of the electrocatalytic component, an end cover is arranged at the upper end of the vertical pipe, a sealing interface for communicating the folding air bag and the air pipe is arranged on the end cover, an elastic pull rope which is positioned in the folding air bag and fixed at the upper end of the first piston is arranged at the lower end of the sealing interface, and the upper end of the air pipe is communicated with the air pump.
Preferably, the upper end of the treatment box is provided with an exhaust window, the lower end of the exhaust window faces the electrocatalytic component, a plurality of groups of air pipes which are communicated with the linear arrangement are transversely arranged in the exhaust window, the upper end of the exhaust window is provided with a pair of exhaust hoods which are bilaterally symmetrical, and the upper end of the exhaust hood is provided with a pair of exhaust pipes.
Preferably, an overflow plate is slidably arranged in an inner cavity of one side of the treatment box, which is close to the water outlet, the height of the overflow plate is smaller than that of the end plate, the anode column and the cathode column both belong to insoluble electrodes, and the anode column is made of titanium as a base material.
The method for realizing the electrocatalytic oxidation device for degrading COD by reverse osmosis concentrated water comprises the following steps:
s1: the method comprises the steps of (1) treating inlet water, wherein the wastewater enters an inner cavity of a treatment box through the inlet water pipe, water laterally enters a first group of electrode groups, and is subjected to power-on electrolysis by utilizing an anode column and a cathode column to generate active oxygen free radicals to oxidize and decompose toxic and harmful pollutants in the wastewater so as to generate harmless gas and precipitable impurities;
s2: s-shaped flow of water flow is realized through the steering baffle plate, and the water flow which is turned in this way sequentially passes through four groups of electrode groups to be subjected to electrocatalytic oxidation treatment, so that water flow reaching the discharge standard is obtained and is discharged along the water outlet;
s3: the deposited residues flow into the semicircular ring pipe along the inclined launder and the one-way slag discharge valve, and accumulated and deposited, and the liquid level of the vertical pipe is equal to the liquid level of the treatment box due to the balance of hydraulic pressure, so that redundant deposited water flows are discharged along the circular ring screen plate along with the accumulation of the deposits;
s4: slag discharge treatment, namely inflating the folding air bag through the air pump, so that the first piston moves to the lower end of the circular ring screen plate and continuously extrudes the inner cavity of the vertical pipe, the second piston descends, the spring is compressed, and the lateral opening is communicated with the semicircular ring pipe, so that residues are discharged in a concentrated mode.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, COD is removed by adopting the electrocatalytic oxidation device to reach the emission standard, and then the COD is discharged after reaching the emission standard, after reverse osmosis concentration, the salt content in the concentrated water is increased, and the efficiency of other types of advanced oxidation devices is affected because the ion content in the water is increased, but for the electrocatalytic advanced oxidation device, the increased salt content is beneficial to electric conduction, thus being beneficial to reducing the running electricity consumption, simultaneously ensuring the COD removal efficiency, compared with the electrocatalytic oxidation device for removing the COD by adopting the ozone catalytic oxidation technology, pure oxygen and H2O2 are not used as raw materials, ozone is not generated by products, and the transportation and storage risks of the chemicals and the explosion and toxicity prevention of the chemicals are not considered;
by arranging the sewage discharging component of the U-shaped pipe structure, the solid residue gathered at the bottom is treated under the condition of uninterrupted treatment process.
Drawings
FIG. 1 is a top view of the present invention;
FIG. 2 is a front view of the present invention;
FIG. 3 is an enlarged view of the structure at B in FIG. 2;
FIG. 4 is an enlarged view of the structure shown at A in FIG. 2;
FIG. 5 is a schematic perspective view of a sewage disposal assembly according to the present invention;
FIG. 6 is a schematic perspective view of an electrode assembly according to the present invention;
fig. 7 is a schematic perspective view of an electrocatalytic component of the present invention.
In the figure: 1. a frame; 2. a power supply box; 3. a treatment box; 4. a primary filter box; 5. a circular ring filter screen tube; 6. a water inlet pipe; 7. a flow meter; 8. a connecting pipe; 9. a water pump; 10. a slot; 11. a steering baffle; 12. an electrocatalytic component; 13. an air pipe; 14. a water outlet; 15. an overflow plate; 16. a double-layer filter screen; 17. a one-way slag discharge valve; 18. a recovery box; 19. a base; 20. a support beam; 21. an exhaust hood; 22. an exhaust pipe; 23. an air pump; 24. an exhaust window; 25. a semicircular ring pipe; 26. an inclined launder; 27. a vertical tube; 28. a lower extension pipe; 29. a manifold; 30. tilting the connecting tube; 31. lifting the inserted link; 32. a spring; 33. a lateral opening; 34. an end cap; 35. sealing the interface; 36. folding the air bag; 37. an elastic pull rope; 38. a first piston; 39. a circular ring screen plate; 40. a polar plate; 41. a mounting rod; 42. an anode column; 43. a cathode column; 44. a first plugboard; 45. an end plate; 46. a second plugboard; 47. and a second piston.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. 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.
Referring to fig. 1 to 7, the present invention provides a technical solution:
an electrocatalytic oxidation device for degrading COD by reverse osmosis concentrated water comprises a frame 1, an electrocatalytic component 12 and a sewage disposal device.
The treatment box 3 is arranged on the frame 1, the power box 2 is arranged on one side of the frame 1, a pair of exhaust assemblies are arranged at the upper end of the treatment box 3, the water inlet pipe 6 is arranged on one side, close to the power box 2, of the treatment box 3, the primary filter box 4 is arranged on one side, close to the water inlet pipe 6, of the treatment box 3, the water inlet pipe 6 is communicated with the inner cavity of the upper end of the primary filter box 4, the ring filter screen pipes 5 which are transversely distributed are arranged in the primary filter box 4, and the flowmeter 7 is arranged on the water inlet pipe 6.
The inflow of the water inlet pipe 6 is monitored by arranging the flowmeter 7, and the initial water flow is filtered by utilizing the primary filter tank 4, so that impurities in the water flow are removed.
The rear side of the circular ring filter screen tube 5 is provided with a connecting port positioned on the primary filter screen tube 4, the outer side of the connecting port is connected with a connecting pipe 8, the side wall of the rear side of the frame 1 is provided with a water pump 9, the water pump 9 is communicated with an electrocatalytic component 12 in the inner cavity of the treatment box 3, and the other end of the water pump 9 is communicated with the hollow inner cavity of the circular ring filter screen tube 5 through the connecting pipe 8.
By providing the cooperation of the water pump 9 and the connecting pipe 8, the wastewater stream is transported into the electrocatalytic assembly 12.
The electrocatalytic component 12 is arranged in the inner cavity of the treatment box 3, the electrocatalytic component 12 comprises a pair of end plates 45 distributed left and right, electrode groups and a steering baffle 11, one side bolt of the pair of end plates 45 distributed left and right is arranged on the inner wall of the treatment box 3, one side of the pair of end plates 45 opposite to each other is fixedly connected through four groups of mounting rods 41 distributed in a matrix, four groups of electrode groups and the steering baffle 11 are arranged on the mounting rods 41 at intervals, the steering baffle 11 is arranged between the adjacent electrode groups, a double-layer filter screen 16 penetrating left and right is arranged on the steering baffle 11, the electrode groups are composed of five polar plates 40 arranged on the mounting rods 41 at intervals, anode columns 42 and cathode columns 43 distributed in a front-back staggered mode are respectively arranged at the upper ends of the adjacent pair of polar plates 40, and the anode columns 42 and the cathode columns 43 are respectively electrically connected with the anode and the cathode of the power box 2.
The electrocatalytic component 12 is powered by the power supply box 2 to form electrocatalytic oxidation on the wastewater, water flows laterally enter the first group of electrode groups, and the anode column 42 and the cathode column 43 are used for electrifying electrolysis to generate active oxygen free radicals to oxidize and decompose toxic and harmful pollutants in the wastewater, so that harmless gas and precipitable impurities are generated.
The front and back inner walls of the treatment box 3 are provided with slots 10 at positions corresponding to the steering partition plates 11, the front and back sides of the steering partition plates 11 are respectively provided with a first plugboard 44 and a second plugboard 46 which are matched and spliced with the slots 10, the first plugboards 44 are fixedly arranged on the double-layer filter screens 16, the double-layer filter screens 16 on the adjacent steering partition plates 11 are in front-back staggered distribution, and the other side of the treatment box 3 is provided with a water outlet 14.
Through the cooperation of multiunit turning to baffle 11 and double-deck filter screen 16, realize the S-shaped flow of rivers, thereby increase the area of contact and the time of rivers and electrode group, improve catalytic treatment ' S efficiency and quality, the rivers that so turn to carries out electrocatalytic oxidation treatment through four electrode groups in proper order, obtain reaching discharge standard ' S rivers and discharge along outlet 14, discharged rivers, reverse osmosis concentrated water salt content promotes 4 times, because the ion content improves in the water, can influence other types advanced oxidation unit ' S efficiency, but to electrocatalytic oxidation unit, the salt content increases and is favorable to electric conduction, help reducing the operation electricity consumption, guarantee COD removes efficiency simultaneously.
The lower extreme of frame 1 transversely is provided with supporting beam 20, the drain is installed in the electrode group, drain and electrode group one-to-one, the drain includes down extension pipe 28, vertical pipe 27 and semicircle ring canal 25, be provided with on the lower extreme inner wall of process box 3 with electrode group one-to-one's slope chute 26, semicircle ring canal 25 is fixed on frame 1, and the upper end both sides port of semicircle ring canal 25 all extends to in the slope chute 26, the upper end both sides port of semicircle ring canal 25 is connected with vertical pipe 27 and one-way slag discharge valve 17 respectively, the lower extreme middle vertical of semicircle ring canal 25 is provided with down extension pipe 28, be provided with the elastic mounting second piston 47 in the lower extension pipe 28, the lateral wall of lower extension pipe 28 is provided with a pair of lateral opening 33 that transversely runs through, the second piston 47 is located the upper end of lateral opening 33, the upper end of vertical pipe 27 is provided with ring otter board 39, the upper end of ring 39 is provided with the folding gasbag 36 of external air pump 23, the lower extreme of folding gasbag 36 is provided with the first piston 38 of slip grafting in vertical pipe 27, the second piston 47 has the second piston 47 to slide in the lower extension pipe 28 and is provided with the upper and lower end of vertical beam 32 of lift spring 31, the upper end of lift beam 32 is supported by the second piston 47, the upper end of lift beam is held at the upper and is held at the upper end of the lift beam 32 and is held at the end of the lift and is held at 31.
The deposited residue flows into the semicircular annular pipe 25 along the inclined launder 26 and the one-way slag discharge valve 17, and accumulated and deposited, the liquid level of the vertical pipe 27 is equal to the liquid level of the treatment tank 3 due to the balance of hydraulic pressure, so that as the deposited and deposited residue is accumulated, the liquid level on one side of the vertical pipe 27 rises, the deposited and superfluous water flow is discharged along the circular net plate 39, when the residue is accumulated to a discharge amount, the air pump 23 inflates the folding air bag 33, so that the first piston moves to the lower end of the circular net plate 39 and continuously extrudes the inner cavity of the vertical pipe 27, the second piston 47 descends, the spring 32 is compressed, and the lateral opening 33 is communicated with the semicircular annular pipe 25, so that the residue is intensively discharged.
The spring 32 ensures that the second piston 47 is positioned at the upper end of the lateral opening 33, so that leakage is avoided, and in the deslagging process, the one-way deslagging valve 17 ensures that the electrocatalytic oxidation treatment of wastewater is not influenced in the extrusion and discharge process, so that the treatment of solid residues gathered at the bottom is realized under the condition of uninterrupted treatment.
Example 2: on the basis of embodiment 1, a pair of bases 19 which are symmetrical left and right are arranged at the lower end of the frame 1, a recovery tank 18 is arranged on the bases 19, two ends of a supporting beam 20 are fixed on the bases 19, inclined connecting pipes 30 which extend obliquely towards the outer side of a lateral opening 33 are connected, inclined connecting pipes 30 at the lower ends of a plurality of groups of linearly distributed pollution discharging devices are connected to a collecting pipe 29, and the end parts of the collecting pipe 29 are communicated with the recovery tank 18.
By providing the cooperation of the inclined connecting pipe 30 and the collecting pipe 29, the centralized discharge of the residues is realized.
Example 3: on the basis of embodiment 2, the upper end of the vertical tube 27 extends to the same height as the upper end of the electrocatalytic component 12, the upper end of the vertical tube 27 is provided with an end cover 34, the upper end of the end cover 34 is provided with a sealing interface 35 for communicating a folding air bag 36 with an air tube 13, the lower end of the sealing interface 35 is provided with an elastic pull rope 37 which is positioned in the folding air bag 36 and fixed at the upper end of a first piston 38, the upper end of the air tube 13 is communicated with an air pump 23, the upper end of the management box 3 is provided with an exhaust window 24, the lower end of the exhaust window 24 is opposite to the electrocatalytic component 12, the exhaust window 24 is transversely provided with a plurality of groups of transverse air tubes 13 which are in linear arrangement, the upper end of the exhaust window 24 is provided with a pair of exhaust hoods 21 which are symmetrical left and right, the upper end of the exhaust hoods 21 is provided with a pair of exhaust pipes 22, an inner cavity of one side of the treatment box 3 close to the water outlet 14 is slidably provided with an overflow plate 15, the height of the overflow plate 15 is smaller than that of an end plate 45, the anode column 42 and the cathode column 43 belong to insoluble electrodes, and the anode column 42 is made of titanium as a base material.
The exhaust hood 21, the exhaust pipe 22 and the exhaust window 24 are arranged, so that gas generated in the oxidation reaction process is collected and discharged in a concentrated mode, the folding air bag 36 is ensured to be in a folding state when the air bag is not inflated through the elastic pull ropes 37, the first piston 38 is positioned at the upper end of the annular screen 39, and redundant water flow is filtered conveniently.
The method for realizing the electrocatalytic oxidation device for degrading COD by reverse osmosis concentrated water comprises the following steps:
s1: the wastewater enters the inner cavity of the treatment box 3 through the water inlet pipe 6, the water flow laterally enters the first group of electrode groups, and the anode column 42 and the cathode column 43 are used for electrifying and electrolyzing to generate active oxygen free radicals to oxidize and decompose toxic and harmful pollutants in the wastewater so as to generate harmless gas and precipitable impurities;
s2: the S-shaped flow of the water flow is realized through the turning partition plate 11, the water flow turned in this way sequentially passes through four groups of electrode groups to be subjected to electrocatalytic oxidation treatment, and the water flow reaching the discharge standard is obtained and is discharged along the water outlet 14;
s3: the deposited residues flow into the semicircular annular pipe 25 along the inclined launder 26 and the one-way slag discharge valve 17, and accumulated and deposited, and the liquid level of the vertical pipe 27 is equal to the liquid level of the treatment box 3 due to the balance of hydraulic pressure, so that the residual deposited water flow is discharged along the circular ring net plate 39 along with the accumulation of the deposited residues;
s4: the slag discharging process inflates the folding air bag 33 through the air pump 23, so that the first piston moves to the lower end of the circular ring net plate 39 and continuously presses the inner cavity of the vertical pipe 27, the second piston 47 descends, the spring 32 is compressed, and the lateral opening 33 is communicated with the semicircular ring pipe 25, so that residues are discharged intensively.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. An electrocatalytic oxidation device for degrading COD by reverse osmosis concentrated water is characterized in that: the electrocatalytic oxidation device comprises:
the device comprises a frame (1), wherein a treatment box (3) is arranged on the frame (1), a power box (2) is arranged on one side of the frame (1), a pair of exhaust assemblies is arranged at the upper end of the treatment box (3), a water inlet pipe (6) is arranged on one side, close to the power box (2), of the treatment box (3), a water outlet (14) is arranged on the other side of the treatment box (3), and a supporting cross beam (20) is transversely arranged at the lower end of the frame (1);
the electro-catalytic assembly (12), the electro-catalytic assembly (12) is installed in the inner cavity of the treatment box (3), the electro-catalytic assembly (12) comprises a pair of end plates (45), electrode groups and a steering baffle plate (11) which are distributed left and right, one side of each end plate (45) is installed on the inner wall of the treatment box (3) through bolts, one opposite side of each end plate (45) is fixedly connected through four groups of installation rods (41) distributed in a matrix, four groups of electrode groups and the steering baffle plate (11) are installed on each installation rod (41) at intervals, the steering baffle plate (11) is installed between the adjacent electrode groups, a double-layer filter screen (16) penetrating left and right is arranged on each steering baffle plate (11), each electrode group consists of five polar plates (40) which are installed on the installation rods (41) at intervals, anode columns (42) and cathode columns (43) which are distributed in a front-back staggered mode are respectively arranged at the upper ends of each pair of the adjacent polar plates (40), and the anode columns (42) and the cathode columns (43) are respectively electrically connected with the positive and negative poles of the power box (2);
the sewage draining device is arranged in the electrode group and comprises a lower extending pipe (28), a vertical pipe (27) and a semicircular annular pipe (25), an inclined launder (26) corresponding to the electrode group is arranged on the inner wall of the lower end of the treatment box (3), the semicircular annular pipe (25) is fixed on the frame (1), ports on two sides of the upper end of the semicircular annular pipe (25) are all extended into the inclined launder (26), the ports on two sides of the upper end of the semicircular annular pipe (25) are respectively connected with the vertical pipe (27) and the one-way slag discharging valve (17), the lower extending pipe (28) is vertically arranged in the middle of the lower end of the semicircular annular pipe (25), a second piston (47) is arranged in the lower extending pipe (28), a pair of lateral openings (33) which transversely penetrate through are arranged on the side walls of the lower extending pipe (28), the second piston (47) is located at the upper end of the lateral openings (33), a circular ring (39) is arranged at the upper end of the vertical pipe (27), the upper end of the semicircular annular pipe (25) is connected with the vertical pipe (27), and the upper end of the circular ring (39) is provided with a folding piston (36) in a folding manner.
2. The electrocatalytic oxidation device for degrading COD by reverse osmosis concentrated water according to claim 1, wherein: the treatment box (3) is provided with first filter tank (4) near one side of inlet tube (6), the upper end inner chamber of inlet tube (6) intercommunication first filter tank (4), be provided with ring filter screen pipe (5) of transverse distribution in first filter tank (4), be provided with flowmeter (7) on inlet tube (6).
3. The electrocatalytic oxidation device for degrading COD by reverse osmosis concentrated water according to claim 2, wherein: the rear side of ring filter screen pipe (5) is provided with the connector that is located on first rose box (4), and the outside of connector is connected with connecting pipe (8), be provided with water pump (9) on the rear side lateral wall of frame (1), electric catalytic assembly (12) in water pump (9) intercommunication processing case (3) inner chamber, the hollow inner chamber of ring filter screen pipe (5) is passed through connecting pipe (8) to the other end of water pump (9).
4. The electrocatalytic oxidation device for degrading COD by reverse osmosis concentrated water according to claim 1, wherein: the utility model discloses a treatment box, including processing case (3), baffle (11) are turned to around, inner wall and turn to the position that baffle (11) corresponds are provided with slot (10), both sides are provided with respectively around turning to baffle (11) with slot (10) cooperation grafting first picture peg (44) and second picture peg (46), first picture peg (44) fixed mounting is at double-deck filter screen (16), and double-deck filter screen (16) on the adjacent baffle (11) are the crisscross distribution around being.
5. The electrocatalytic oxidation device for degrading COD by reverse osmosis concentrated water according to claim 1, wherein: the lower extreme of frame (1) is provided with a pair of base (19) of bilateral symmetry, be provided with collection box (18) on base (19), the both ends of supporting beam (20) are fixed on base (19), and the outside of side direction opening (33) is connected with slope connecting pipe (30) that extend to the slope, and slope connecting pipe (30) of the multiunit blowdown device lower extreme of linear distribution all are connected on collecting pipe (29), and the tip intercommunication collection box (18) of collecting pipe (29).
6. The electrocatalytic oxidation device for degrading COD by reverse osmosis concentrated water according to claim 5, wherein: the lower extension pipe (28) is internally provided with a second piston (47) in a sliding manner, the lower end of the second piston (47) is vertically provided with a lifting inserting rod (31), the lower end of the lifting inserting rod (31) penetrates through the supporting beam (20) in a sliding manner, the lifting inserting rod (31) is vertically sleeved with a spring (32), and the upper end and the lower end of the spring (32) are respectively propped between the second piston (47) and the supporting beam (20).
7. The electrocatalytic oxidation device for degrading COD by reverse osmosis concentrated water according to claim 6, wherein: the upper end of the vertical tube (27) extends to the same height as the upper end of the electrocatalytic component (12), an end cover (34) is arranged at the upper end of the vertical tube (27), a sealing interface (35) for communicating a folding air bag (36) with the air tube (13) is arranged on the end cover (34), an elastic pull rope (37) which is positioned in the folding air bag (36) and is fixed at the upper end of the first piston (38) is arranged at the lower end of the sealing interface (35), and the upper end of the air tube (13) is communicated with the air pump (23).
8. The electrocatalytic oxidation device for degrading COD by reverse osmosis concentrated water according to claim 7, wherein: the upper end of the treatment box (3) is provided with an exhaust window (24), the lower end of the exhaust window (24) is aligned with the electrocatalytic component (12), a plurality of groups of air pipes (13) which are communicated with each other in a linear arrangement are transversely arranged in the exhaust window (24), the upper end of the exhaust window (24) is provided with a pair of exhaust hoods (21) which are bilaterally symmetrical, and the upper end of the exhaust hoods (21) is provided with a pair of exhaust pipes (22).
9. The electrocatalytic oxidation device for degrading COD by reverse osmosis concentrated water according to claim 8, wherein: an overflow plate (15) is slidably mounted in an inner cavity of one side of the treatment box (3) close to the water outlet (14), the height of the overflow plate (15) is smaller than that of the end plate (45), the anode column (42) and the cathode column (43) both belong to insoluble electrodes, and the anode column (42) is made of titanium serving as a base material.
10. A method for realizing the electrocatalytic oxidation device for degrading COD by reverse osmosis concentrated water according to any one of claims 1-9, which is characterized by comprising the following steps: the method comprises the following steps:
s1: the method comprises the steps of (1) treating inlet water, enabling waste water to enter an inner cavity of a treatment box (3) through a water inlet pipe (6), enabling water flow to laterally enter a first group of electrode groups, and conducting power-on electrolysis through an anode column (42) and a cathode column (43) to generate active oxygen free radicals to oxidize and decompose toxic and harmful pollutants in the waste water so as to generate harmless gas and precipitable impurities;
s2: s-shaped flow of water flow is realized through the steering baffle plate (11), and the water flow which is turned in this way sequentially passes through the four groups of electrode groups to be subjected to electrocatalytic oxidation treatment, so that water flow which reaches the discharge standard is obtained and is discharged along the water outlet (14);
s3: the sedimentary residues flow into the semicircular ring pipe (25) along the inclined launder (26) and the one-way slag discharge valve (17) and accumulate and sediment, and the liquid level of the vertical pipe (27) is equal to the liquid level of the treatment box (3) due to the balance of hydraulic pressure, so that redundant sedimentary water flows are discharged along the circular ring screen plate (39) along with the accumulation of sediment;
s4: slag discharge treatment, namely, the air pump (23) is used for inflating the folding air bag (33) so that the first piston moves to the lower end of the circular ring net plate (39) and continuously extrudes the inner cavity of the vertical pipe (27), the second piston (47) descends, the spring (32) is compressed, and the lateral opening (33) is communicated with the semicircular ring pipe (25), so that residues are discharged intensively.
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| CN215798632U (en) * | 2021-03-26 | 2022-02-11 | 江苏智诚达环保科技有限公司 | Electro-catalytic water treatment device with modularized multiple groups of baffling |
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| CN209468244U (en) * | 2018-12-29 | 2019-10-08 | 青岛亚通达铁路设备有限公司 | A kind of processing train high-concentration sewage advanced oxidation device |
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| CN116854204B (en) | 2024-02-27 |
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