CN210457807U - High-efficient ozone catalytic oxidation advanced treatment unit of printing and dyeing wastewater - Google Patents
High-efficient ozone catalytic oxidation advanced treatment unit of printing and dyeing wastewater Download PDFInfo
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- CN210457807U CN210457807U CN201920960553.XU CN201920960553U CN210457807U CN 210457807 U CN210457807 U CN 210457807U CN 201920960553 U CN201920960553 U CN 201920960553U CN 210457807 U CN210457807 U CN 210457807U
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Abstract
The utility model discloses a printing and dyeing wastewater's high-efficient ozone catalytic oxidation advanced treatment unit, wherein processing apparatus includes: the device comprises an air floatation treatment system and a reaction tank connected with the water outlet end of the air floatation treatment system, wherein the reaction tank is provided with a plurality of end-to-end runners, a homogeneous phase catalytic reactor, a plurality of stages of ozone catalytic reaction systems and an activated carbon filter tank are sequentially arranged in the runners, the ozone catalytic reaction system comprises a centrifugal pump, an ozone gas dissolving device and a steam-water mixer which are sequentially connected through pipelines, the water inlet end of the centrifugal pump and the steam-water mixer respectively extend into the runners, and by the arrangement, pollutants such as difficultly degradable colloidal organic matters and soluble organic matters contained in printing and dyeing wastewater after secondary biochemical treatment can be effectively removed, so that the aims of advanced treatment and discharge by upgrading of the wastewater are fulfilled, and the device has the advantages of small floor area, stable water outlet, flexible process, low cost and the like.
Description
Technical Field
The utility model relates to an industrial wastewater treatment technical field, in particular to a high-efficient ozone catalytic oxidation advanced treatment unit of printing and dyeing wastewater.
Background
The printing and dyeing enterprise is an industrial wastewater discharge large-scale user, has the characteristics of large water quantity, high organic pollutant content, deep chromaticity, large alkalinity, large water quality change and the like, and belongs to industrial wastewater which is difficult to treat. At present, the domestic printing and dyeing wastewater treatment process is mainly divided into two categories: one is a physical and chemical method and the other is a biochemical method. In recent years, a large amount of organic matters which are difficult to be biochemically degraded, such as PVA slurry, rayon alkaline hydrolysate (mainly phthalic acid substances), novel auxiliaries and the like, enter printing and dyeing wastewater, and the traditional biological treatment process is seriously challenged. In addition, the national requirements for discharged water quality are continuously improved, namely, the COD of the discharged water can reach below 80mg/L, and the total nitrogen can be controlled below 15mg/L, and meanwhile, as the national requirements for environmental protection are more and more strict, the water discharge index is continuously improved in recent years, so that the efficient and economic advanced printing and dyeing wastewater treatment process and equipment technology have more and more wide application prospects.
The current popular various deep treatment methods are: biological aerated filters, advanced oxidation processes (fenton, ozone), physical adsorption processes, membrane separation techniques, and the like. The operation cost of the biological aerated filter is low, but the biological aerated filter is greatly influenced by water quality change; the Fenton method needs to adjust the pH value and add a large amount of iron salt, so that the salt content in the effluent is high, the reuse is not facilitated, a large amount of sludge can be formed, and the treatment difficulty is increased; the adsorption method mainly utilizes the porous structures of the activated carbon and the macroporous adsorption resin to remove the refractory substances, and has high investment and high operation cost. The water outlet effect is very good at the early stage of operation, but the water outlet effect gradually becomes worse along with the adsorption saturation of the activated carbon until the system completely loses the removal capability, and the activated carbon needs to be regenerated. And the regeneration method is complex, the regeneration times are limited, and a large amount of waste carbon is generated as a secondary pollutant.
Ozone is widely used in wastewater treatment, especially advanced treatment in the later period, because of its strong oxidizing ability, fast reaction speed, and no generation of sludge and secondary pollution. However, the single use of ozone has the problems of low solubility in water, narrow selective range for organic oxidation and the like, and the utilization rate of ozone is low. The reasonable use of the catalyst can promote the decomposition of the hydroxyl free radical with stronger oxidation capacity in the water by the ozone, accelerate the oxidation rate of the organic matters and greatly improve the utilization rate of the ozone. However, the existing ozone catalytic oxidation process and device have the following problems in practical production and application: the mass transfer effect of the ozone and the wastewater is poor, and the ozone utilization rate is low. The existing ozone oxidation tower is limited by the size of bubbles generated by ozone, air-water contact is insufficient, and an efficient steam-water mixing mode is lacked, so that the ozone utilization rate is low. Meanwhile, ozone is added once and directly reacts with organic pollutants, the oxidative decomposition of the ozone is selective, the reaction rate is slow, the treatment effect is general, and the ozone utilization rate is low; the adoption of metal catalysts and other catalysts has low efficiency of exciting hydroxyl radicals (. OH), which results in low efficiency of catalytic oxidation of ozone.
Therefore, in order to solve the above technical problems, it is necessary to provide a process and an apparatus for high-efficiency catalytic ozonation of printing and dyeing wastewater.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a printing and dyeing wastewater's high-efficient ozone catalytic oxidation advanced treatment process and device can effectually get rid of through pollutants such as difficult degradation colloidal organic matter and solubility organic matter that contain in the printing and dyeing wastewater after the biochemical treatment of second grade, reaches the target that waste water advanced treatment and put up a mark and discharge, and has that area is little, goes out water advantages such as stable, the flexible and cost-effective of technology.
The utility model discloses a printing and dyeing wastewater's high-efficient ozone catalytic oxidation advanced treatment unit: including air supporting processing system and connection the reaction tank of air supporting processing system play water end, the reaction tank is equipped with a plurality of end to end's runner, be equipped with homogeneous phase catalytic reactor, a plurality of grades of ozone catalytic reaction system and active carbon filtering pond in the runner in proper order, the ozone catalytic reaction system includes that centrifugal pump, ozone that the pipeline connects gradually dissolve gas device and vapour water mixer, the end of intaking of centrifugal pump stretches into in the runner respectively with vapour water mixer.
Further, an ozone inlet pipeline is connected to the ozone dissolving device.
Further, the ozone catalytic reaction system is three-stage and each stage of ozone catalytic reaction system is arranged in sequence.
Further, the adding amount ratio of ozone in the three-stage ozone catalytic reaction system is 3:2: 1; the residence time of each stage of the ozone catalytic reaction system is 15 minutes.
Further, the homogeneous catalytic reactor comprises a metal plate for catalysis and a primary battery generator for supplying power to the metal plate.
Furthermore, an electromagnetic generation system is arranged in the ozone gas dissolving device.
Furthermore, the water inlet end of the centrifugal pump and the steam-water mixer respectively extend into different runners.
Further, the activated carbon filter adopts saturated activated carbon filler.
The utility model discloses a printing and dyeing wastewater's high-efficient ozone catalytic oxidation advanced treatment process: the method comprises the following steps:
1) the printing and dyeing wastewater after the secondary biochemical treatment enters an air floatation treatment system, and suspended organic matters and colloidal pollutants in the inlet water are removed by adding a coagulating agent and adopting a dissolved steam air floatation mode, so that the SS value of the inlet water is reduced;
2) the wastewater treated by the air floatation treatment system enters a homogeneous phase catalytic reactor, and a metal polar plate is excited to generate metal ions with a catalytic action by controlling the magnitude of current, and the metal ions are complexed with soluble organic matters;
3) the wastewater treated by the homogeneous catalytic reactor enters an ozone gas dissolving device to be mixed with ozone gas under the action of a centrifugal pump, and an electromagnetic shear field is generated by an electromagnetic generation system to change the cluster structure of water molecules, soluble organic matter molecules and other substances in the wastewater; simultaneously, the metal ions act together to excite more hydroxyl free radicals (OH), and the metal ions are finally oxidized and decomposed by ozone after being complexed with soluble organic matters;
4) the wastewater treated by the ozone gas dissolving device enters a steam-water mixer, a steam-water mixture in which a large amount of ozone is dissolved in the ozone gas dissolving device is fully mixed with the wastewater in a jet flow mode, and the hydroxyl radicals (OH) oxidize and decompose soluble organic matters in the wastewater;
5) the wastewater treated by the steam-water mixer enters an activated carbon filter, and saturated activated carbon filler is adopted in the activated carbon filter to further intercept micromolecular organic matters formed by ozone ring opening;
6) and (6) discharging water.
Further, the adding amount ratio of ozone in the three-stage ozone catalytic reaction system is 3:2: 1; the residence time of each stage of the ozone catalytic reaction system is 15 minutes.
To sum up, the utility model discloses following beneficial effect has:
1. the utility model discloses a high-efficient ozone catalytic oxidation advanced treatment technology and device of printing and dyeing waste water, the hydroxyl free radical (OH) that adopts ozone catalytic oxidation mode to produce can degrade organic pollutant unselectively, and reaction rate is fast, has improved the utilization ratio of ozone effectively, and the degradation is thorough, and the treatment effect is outstanding and this catalytic oxidation treatment process does not produce secondary pollution and also does not produce mud, and is clean effective; meanwhile, the process is mature, wide in application and stable and reliable in operation.
2. The utility model discloses a high-efficiency ozone catalytic oxidation advanced treatment process and device for printing and dyeing wastewater, which are convenient and flexible to operate, and change the dosing quantity of a pretreatment air floatation treatment system, a metal polar plate of a homogeneous catalytic reactor and a three-level ozone dosing quantity according to different wastewater qualities so as to lead the effluent to reach the standard stably; on the basis, the treatment system can be finely adjusted by adjusting the excitation current of the primary battery of the homogeneous catalytic reaction system, controlling the adding amount of catalytic metal and the intensity of the switching electromagnetic field in the ozone gas dissolving device, and cost control is conveniently and flexibly carried out on the technology that effluent reaches the standard.
3. The utility model discloses a printing and dyeing wastewater's high-efficient ozone catalytic oxidation advanced treatment technology and device has automation, easy operation, the operation is stable, area is little, and contrast tradition technology running cost is low, and final effluent main indicator COD value can stably reach "town sewage treatment plant pollution emission standard" GB 18918-.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
in the figure: 1. an air floatation treatment system; 2. a reaction tank; 3. a homogeneous catalytic reactor; 4. a centrifugal pump; 5. an ozone gas dissolving device; 6. a vapor-water mixer; 7. an active carbon filter.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
As shown in fig. 1, the high-efficiency ozone catalytic oxidation advanced treatment device for printing and dyeing wastewater comprises an air floatation treatment system 1 and a reaction tank 2 connected with a water outlet end of the air floatation treatment system 1, wherein the reaction tank 2 is provided with a plurality of end-to-end flow channels, a homogeneous catalytic reactor 3, a plurality of stages of ozone catalytic reaction systems and an activated carbon filter 7 are sequentially arranged in the flow channels, each ozone catalytic reaction system comprises a centrifugal pump 4, an ozone gas dissolving device 5 and a steam-water mixer 6 which are sequentially connected through pipelines, a water inlet end of each centrifugal pump 4 and the corresponding steam-water mixer 6 respectively extend into the flow channels, and the best effect is that a water inlet end of each centrifugal pump 4 and the corresponding steam-water mixer 6 respectively extend into adjacent flow channels.
The air floatation treatment system 1 is in the prior art, and the air floatation treatment system 1 comprises an air compressor, an air dissolving device, an air floatation coagulation reaction device, a mud skimming machine, related pipelines and the like.
The ozone gas dissolving device 5 is connected with an ozone gas inlet pipeline.
The ozone catalytic reaction system is three-stage, each stage of ozone catalytic reaction system is sequentially arranged, and the ozone adding amount ratio of the three-stage ozone catalytic reaction system is 3:2: 1; the residence time of each stage of the ozone catalytic reaction system is 15 minutes.
The homogeneous phase catalytic reactor 3 comprises a metal polar plate with a catalytic function and a primary battery generator for supplying power to the metal polar plate, and an electromagnetic generation system is arranged in the ozone gas dissolving device 5.
The activated carbon filter 7 adopts saturated activated carbon filler.
The utility model discloses a printing and dyeing wastewater's high-efficient ozone catalytic oxidation advanced treatment process: the method comprises the following steps:
1) the printing and dyeing wastewater after the secondary biochemical treatment enters an air floatation treatment system 1, organic suspended matters and colloid in the bonding wastewater form floc by adding ferric sulfate (PSF) and a cationic Polyacrylamide (PAM) coagulant, the floc floats to the water surface and is removed by a mud skimming machine, the SS value of inlet water is reduced, a part of COD value in the inlet water is removed, and the subsequent ozone advanced oxidation efficiency is improved;
2) the wastewater treated by the air floatation treatment system 1 enters a homogeneous phase catalytic reactor 3, and a metal polar plate is excited to generate metal ions with catalytic action by controlling the current, and the metal ions are complexed with soluble organic matters;
3) the wastewater treated by the homogeneous catalytic reactor 3 enters an ozone gas dissolving device 5 to be mixed with ozone gas under the action of a centrifugal pump 4, and an electromagnetic shear field is generated by an electromagnetic generation system to change the cluster structure of water molecules, soluble organic matter molecules and other substances in the wastewater; simultaneously, the metal ions and the metal ions act together to excite more hydroxyl free radicals (. OH), the metal ions and the soluble organic matters are finally decomposed by ozone oxidation after being complexed with water in the first-stage ozone catalytic oxidation reactor, so that the soluble organic matter molecules in the wastewater are effectively decomposed, and COD is effectively removed; the adding amount ratio of ozone of the three-stage ozone catalytic reaction system is 3:2: 1; the residence time of each stage of the ozone catalytic reaction system is 15 minutes;
4) the wastewater treated by the ozone gas dissolving device 5 enters a steam-water mixer 6, a steam-water mixture in which a large amount of ozone is dissolved in the ozone gas dissolving device 5 is fully mixed with the wastewater in a jet flow mode, and the hydroxyl radicals (OH) oxidize and decompose soluble organic matters in the wastewater;
5) the wastewater treated by the steam-water mixer 6 enters an activated carbon filter 7, a small amount of macromolecular chain-like organic matters and a small amount of micromolecular organic pollutants after ring opening and breaking by ozone are further removed, the effluent quality is improved, the purpose of reaching the standard stably is achieved, and finally the wastewater is discharged after being baffled at the bottom;
6) after a period of time (specifically determined by the quality of the treated water), the intercepted substances are removed by water outlet backwashing, and the recycling is realized.
The raw water inlet water quality indexes are as follows: CODCr is 180-200mg/L, SS is 30-40mg/L, and chroma is 30-40.
After passing through the pretreatment air flotation device, the water quality indexes are as follows: CODCr 90-100mg/L, SS 20mg/L, and color 5-10.
The effluent quality indexes of the third-stage ozone catalytic oxidation reactor are as follows: CODCr is less than 50mg/L and within SS5mg/L, and chromaticity cannot be detected.
The quality of the final effluent water is changed as follows: CODCr is less than 40mg/L, SS cannot be detected, and chroma cannot be detected.
Through the above experiments, the following conclusions can be drawn: by the device, the main effluent indexes CODCr, SS and chromaticity index can be ensured to completely reach the discharge standard GB18918-2012 first-grade A of discharge Standard of urban Sewage treatment plant.
The above is only the preferred embodiment of the present invention, so all the equivalent changes or modifications made by the structure, features and principles in accordance with the claims of the present invention are included in the claims of the present invention.
Claims (8)
1. The utility model provides a printing and dyeing wastewater's high-efficient ozone catalytic oxidation advanced treatment unit which characterized in that: including air supporting processing system (1) and connection reaction tank (2) of air supporting processing system (1) play water end, reaction tank (2) are equipped with a plurality of end to end's runner, be equipped with homogeneous phase catalytic reactor (3), a plurality of grades of ozone catalytic reaction system and active carbon filtering pond (7) in the runner in proper order, the ozone catalytic reaction system includes centrifugal pump (4), ozone that the pipeline connected gradually dissolves gas device (5) and vapour water mixer (6), the end of intaking of centrifugal pump (4) stretches into in the runner respectively with vapour water mixer (6).
2. The high-efficiency ozone catalytic oxidation advanced treatment device for the printing and dyeing wastewater as claimed in claim 1, which is characterized in that: the ozone gas dissolving device (5) is connected with an ozone gas inlet pipeline.
3. The high-efficiency ozone catalytic oxidation advanced treatment device for the printing and dyeing wastewater as claimed in claim 2, characterized in that: the ozone catalytic reaction system is three-stage and each stage of ozone catalytic reaction system is arranged in sequence.
4. The high-efficiency ozone catalytic oxidation advanced treatment device for the printing and dyeing wastewater as claimed in claim 3, characterized in that: the adding amount ratio of ozone of the three-stage ozone catalytic reaction system is 3:2: 1; the residence time of each stage of the ozone catalytic reaction system is 15 minutes.
5. The high-efficiency ozone catalytic oxidation advanced treatment device for the printing and dyeing wastewater as claimed in claim 1, which is characterized in that: the homogeneous catalytic reactor (3) comprises a metal plate for catalysis and a primary battery generator for supplying power to the metal plate.
6. The high-efficiency ozone catalytic oxidation advanced treatment device for the printing and dyeing wastewater as claimed in claim 1, which is characterized in that: an electromagnetic generation system is arranged in the ozone gas dissolving device (5).
7. The high-efficiency ozone catalytic oxidation advanced treatment device for the printing and dyeing wastewater as claimed in claim 1, which is characterized in that: the water inlet end of the centrifugal pump (4) and the steam-water mixer (6) respectively extend into different flow channels.
8. The high-efficiency ozone catalytic oxidation advanced treatment device for the printing and dyeing wastewater as claimed in claim 1, which is characterized in that: the activated carbon filter (7) adopts saturated activated carbon filler.
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| CN110204134A (en) * | 2019-06-25 | 2019-09-06 | 绍兴柯桥江滨水处理有限公司 | A kind of the efficient ozone catalytic oxidation advanced treatment technique and device of dyeing waste water |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110204134A (en) * | 2019-06-25 | 2019-09-06 | 绍兴柯桥江滨水处理有限公司 | A kind of the efficient ozone catalytic oxidation advanced treatment technique and device of dyeing waste water |
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