CN216998058U - Industrial wastewater treatment system - Google Patents
Industrial wastewater treatment system Download PDFInfo
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- CN216998058U CN216998058U CN202121054130.5U CN202121054130U CN216998058U CN 216998058 U CN216998058 U CN 216998058U CN 202121054130 U CN202121054130 U CN 202121054130U CN 216998058 U CN216998058 U CN 216998058U
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Abstract
The utility model discloses an industrial wastewater treatment system, which relates to the technical field of sewage treatment, and comprises a primary ozone catalytic oxidation tank, a biological oxidation tank, a secondary ozone catalytic oxidation tank and an aeration biological filter tank, and also comprises a pretreatment system and a clean water tank; the industrial wastewater is treated by the pretreatment system and then flows into the primary ozone catalytic oxygen tank for catalytic oxidation, and the primary ozone catalytic oxidation tank is sequentially communicated with the biological oxidation tank, the secondary ozone catalytic oxidation tank, the biological aerated filter and the clean water tank; the primary ozone catalytic oxidation tank also comprises a jet aeration system, and the primary ozone catalytic oxidation tank pumps the ozone tail gas of the secondary ozone catalytic oxidation tank for recycling through the jet aeration system. The industrial wastewater treatment system disclosed by the utility model can improve the utilization rate of ozone and improve the treatment effect on industrial wastewater with poor biodegradability.
Description
Technical Field
The utility model relates to the technical field of sewage treatment, in particular to an industrial wastewater treatment system.
Background
Industrial wastewater has great treatment difficulty due to complex water quality, toxic and harmful organic pollutants, difficult degradation and the like, and poses serious threats to water environment quality and water ecological safety, so that the development of an efficient industrial wastewater treatment technology is urgent. However, the industrial wastewater discharge reaching the standard is difficult to realize by only depending on the traditional biological method, and a physicochemical and biological method combined process is required to be adopted.
Currently, the Fenton pretreatment and activated sludge process are most commonly combined, however, the Fenton pretreatment has the defects of large acid and alkali consumption, large chemical sludge yield and the like. Although ozone oxidation and ozone catalytic oxidation are increasingly applied as advanced treatment processes of effluent of a biochemical secondary sedimentation tank, the operation cost is high if the residual pollutants difficult to degrade are efficiently removed, and the ozone adding amount needs to be increased.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects of the prior art, the utility model aims to provide an industrial wastewater treatment system, aiming at solving the problems of high industrial wastewater treatment cost, poor removal effect of degradation-resistant pollutants, difficult standard reaching of effluent and the like in the prior art.
In order to realize the purpose, the utility model is realized by the following technical scheme: the industrial wastewater treatment system comprises a pretreatment system, a primary ozone catalytic oxidation tank, a biological oxidation tank, a secondary ozone catalytic oxidation tank, a biological aerated filter and a clean water tank which are sequentially communicated.
According to the one hand of above-mentioned technical scheme, one-level ozone catalytic oxidation pond and second grade ozone catalytic oxidation pond are seal structure, one-level ozone catalytic oxidation pond with the bottom of the pool in second grade ozone catalytic oxidation pond all is equipped with ozone micropore aeration dish, one-level ozone catalytic oxidation pond with the pond top of second grade ozone catalytic oxidation pond is equipped with the tail gas and arranges the mouth, one-level ozone catalytic oxidation pond with all having thrown ozone catalyst in the pond in second grade ozone catalytic oxidation pond, the pond top tail gas row mouth of one-level ozone catalytic oxidation pond is connected to through the pipeline ozone tail gas destruction device.
According to one aspect of the technical scheme, the industrial wastewater treatment system further comprises a jet aeration system, the jet aeration system is installed at the top of the primary ozone catalytic oxidation tank, a water inlet of the jet aeration system is located below the liquid level in the primary ozone catalytic oxidation tank, an air inlet of the jet aeration system is communicated with an ozone tail gas exhaust port of the secondary ozone catalytic oxidation tank through a pipeline, and an air-water mixed liquid nozzle of the jet aeration system is arranged at the bottom of the primary ozone catalytic oxidation tank; the industrial wastewater treatment system further comprises an ozone generator and an ozone tail gas destruction device, wherein the ozone generator is connected to the primary ozone catalytic oxidation tank and the secondary ozone catalytic oxidation tank through an ozone conveying pipeline, and the ozone tail gas destruction device is connected to a tail gas discharge port of the primary ozone catalytic oxidation tank through a pipeline.
According to one aspect of the technical scheme, the industrial wastewater treatment system further comprises an aeration fan and a back-flushing fan, and the biological aerated filter is respectively connected with the aeration fan and the back-flushing fan through pipelines.
According to one aspect of the technical scheme, the industrial wastewater treatment system further comprises a back-flushing water outlet buffer tank, the biological aerated filter is connected with the clean water tank through a pipeline, the clean water tank provides back-flushing water for the biological aerated filter, the biological aerated filter is communicated with the back-flushing water outlet buffer tank through a pipeline, and the back-flushing water outlet buffer tank is communicated with the front end of the pretreatment system through a pipeline.
Compared with the prior art, the utility model has the beneficial effects that: the industrial wastewater treatment system disclosed by the utility model comprises two ozone catalytic oxidation tanks, wherein the primary ozone catalytic oxidation tank is mainly used for introducing ozone to pre-oxidize wastewater, improving the biodegradability of the wastewater, reducing the toxicity of the wastewater and the like, and the required ozone is used for pumping the ozone tail gas of the secondary ozone catalytic oxidation tank for utilization through a jet aeration system at the top of the primary ozone catalytic oxidation tank, so that the ozone utilization efficiency of the whole process can be improved. After the effluent of the first-level ozone catalytic oxidation tank is treated by the biological oxidation tank, most pollutants such as COD, nitrogen, phosphorus and the like are removed, and residual organic matters which are difficult to degrade enter the second-level ozone catalytic oxidation tank. The ozone provided by the ozone generator to the secondary ozone catalytic oxidation tank further removes the refractory organic matters under the catalytic action of the catalyst, and finally the effluent passes through the biological aerated filter to reach the standard and is discharged.
In addition, according to the industrial wastewater treatment system disclosed by the utility model, the ozone generator is respectively connected with the primary ozone catalytic oxidation tank and the secondary ozone catalytic oxidation tank through pipelines. When the content of refractory organic matters in the inlet water is relatively low (lower than a first pollution threshold value), the ozone generator only provides ozone for the secondary ozone catalytic oxidation tank, and the primary ozone catalytic oxidation tank only pumps ozone tail gas of the secondary ozone catalytic oxidation tank through the jet aeration system for recycling, so that the biodegradability of the wastewater can be improved; when the content of the refractory organic matters (higher than a first pollution threshold) is higher, the ozone tail gas of the secondary ozone catalytic oxidation tank is utilized by the primary ozone catalytic oxidation tank, and a certain amount of ozone can be additionally provided by the ozone generator, so that the high-efficiency conversion of the refractory organic matters can be ensured, the biodegradability of wastewater is improved, and the high-efficiency operation of a subsequent biological reaction tank is ensured. Through the ozone utilization strategy, efficient utilization of ozone and stable standard reaching of effluent can be considered, impact load of pollutants difficult to degrade is effectively dealt with, and the whole operation cost is obviously reduced.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic view showing the construction of an industrial wastewater treatment system according to a first embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a primary catalytic ozonation tank, a jet aeration system, and a secondary catalytic ozonation tank in a first embodiment of the present invention;
the figures are illustrated by the following main component symbols:
the system comprises a pretreatment system 10, a primary ozone catalytic oxidation tank 20, a jet aerator water inlet pump 210, a jet aerator 211, a gas-water mixed liquid nozzle 212, a biological oxidation tank 30, a secondary ozone catalytic oxidation tank 40, an ozone tail gas outlet 410, a biological aerated filter 50, a clean water tank 60, an ozone generator 70, an aeration fan 80, a backwashing fan 90, a backwashing water outlet buffer tank 100 and ozone tail gas destruction equipment 110;
in fig. 1: firstly, water inlet, water outlet, thirdly, backwashing water inlet of the biological aerated filter, fourthly, backwashing water outlet of the biological aerated filter to flow back, and fifthly, the primary ozone catalytic oxidation tank sucks and reutilizes the ozone tail gas of the secondary ozone catalytic oxidation tank through a jet aeration system.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.
Detailed Description
In order to make the objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. Several embodiments of the utility model are presented in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical," "horizontal," "left," "right," "up," "down," and the like are used for descriptive purposes only and not for purposes of indicating or implying that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the utility model.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1-2, a first embodiment of the present invention provides an industrial wastewater treatment system, which includes a pretreatment system 10 and a clean water tank 60, wherein the pretreatment system 10 includes, but is not limited to, a coarse grid, a fine grid, a grit chamber, a conditioning tank/accident tank, a coagulation sedimentation, an air flotation, and other pretreatment processes. The industrial wastewater is firstly subjected to coarse grating and fine grating removal to remove suspended matters in the industrial wastewater, then granular inorganic matters in the industrial wastewater are removed through a grit chamber, then the industrial wastewater enters an adjusting tank to be subjected to uniform stabilization of water quality, the effluent of the adjusting tank enters a coagulating sedimentation tank, a coagulating agent is added to further remove fine suspended matters in the industrial wastewater, and the supernatant of the sedimentation tank enters a subsequent treatment process. The pretreatment system 10 provided by the embodiment can be used for pretreating industrial wastewater, so that the quality of the industrial wastewater is simply and effectively improved.
In this embodiment, the industrial wastewater treatment system further includes a primary catalytic ozonation tank 20, a biological oxidation tank 30, a secondary catalytic ozonation tank 40, and a biological aerated filter 50, the industrial wastewater treated by the pretreatment system 10 flows into the primary catalytic ozonation tank for catalytic oxidation, and the primary catalytic ozonation tank 20 is sequentially communicated with the biological oxidation tank 30, the secondary catalytic ozonation tank 40, the biological aerated filter 50, and the clean water tank 60.
In this embodiment, the symbols shown in fig. 1 indicate that firstly, the industrial wastewater treatment system according to the present invention is supplied with water, secondly, the system is discharged with water, thirdly, the clean water tank is used for supplying backwash water to the biological aerated filter, fourthly, the backwash water from the biological aerated filter flows back to the front end of the pretreatment system, and fifthly, the primary catalytic ozonation tank is used for pumping ozone tail gas from the secondary catalytic ozonation tank through the jet aeration system.
Specifically, the effluent of the pretreatment system 10 is connected with the primary ozone catalytic oxidation tank 20 through a pipeline, and ozone generates a large amount of hydroxyl radicals (OH) with strong oxidizing property under the action of a catalyst, so that the substance structure of organic matters which are difficult to degrade in the industrial wastewater can be destroyed, the organic matters are converted into small molecular organic matters which are easy to be converted and utilized by microorganisms, and the biodegradability of the industrial wastewater is improved. The biological oxidation pond 30 is connected with the primary ozone catalytic oxidation pond 20 through a pipeline, industrial wastewater with improved biodegradability enters the biological oxidation pond 30, easily degradable organic matters are efficiently removed under the action of microorganisms, and residual difficultly degradable organic matters enter the subsequent secondary ozone catalytic oxidation pond 40 along with effluent. The secondary ozone catalytic oxidation pond 40 is connected with the biological oxidation pond 30 through a pipeline, and the effluent of the biological oxidation pond 30 enters the secondary ozone catalytic oxidation pond 40. The hydroxyl free radical generated by the ozone can destroy the structure of the residual organic matters difficult to degrade again, and can be converted into bioavailable small molecular organic matters, and the biodegradability of the wastewater can be improved again. The biological aerated filter 50 is connected with the secondary ozone catalytic oxidation tank 40 through a pipeline, and the effluent of the secondary ozone catalytic oxidation tank 40 enters the biological aerated filter 50. The residual organic matters in the wastewater are further removed by the biological aerated filter 50, and the quality of the effluent can stably reach the standard. The clean water tank 60 is connected with the biological aerated filter 50 through a pipeline, and the outlet water of the biological aerated filter 50 enters the clean water tank 60. The clean water tank 60 is provided with a water outlet to realize standard discharge.
Wherein the filler of the biological aerated filter 50 is ceramsite with the diameter of 3-5mm, the hydraulic retention time of an empty bed is controlled to be 35-45min, the filtering speed is 3.0-5.0m/h, and BOD5The load was 0.5kgBOD5/m3D is as follows.
In this embodiment, the first-order catalytic ozonation tank 20 and the second-order catalytic ozonation tank 40 are both sealing structures, wherein, the bottom of the first-order catalytic ozonation tank 20 and the bottom of the second-order catalytic ozonation tank 40 are both provided with ozone micropore aeration discs, the top of the first-order catalytic ozonation tank 20 and the top of the second-order catalytic ozonation tank 40 are provided with tail gas discharge ports, load-type catalysts are added into the first-order catalytic ozonation tank 20 and the second-order catalytic ozonation tank 40, and the outlet of the top of the first-order catalytic ozonation tank 20 is connected to the ozone tail gas destruction device 110 through a pipeline.
In this embodiment, the industrial wastewater treatment system further comprises a jet aeration system connected between the primary ozonation catalytic oxidation tank 20 and the secondary ozonation catalytic oxidation tank 40. The jet aeration system comprises a jet aerator 211, a jet aerator water inlet pump 210 and a gas-water mixed liquid nozzle 212, wherein the air inlet of the jet aeration system is communicated with an ozone tail gas discharge port 410 of the secondary ozone catalytic oxygen pool, and the gas-water mixed liquid nozzle 212 of the jet aeration system is arranged at the bottom of the primary ozone catalytic oxygen pool. Through efflux aeration systems, can pump the ozone tail gas of second grade ozone catalytic oxidation pond 40 on the one hand to in efflux aerator 211 among the efflux aeration systems with the industrial waste water intensive mixing of one-level ozone catalytic oxidation pond 20, realize the high-efficient utilization of ozone tail gas, on the other hand can utilize efflux aeration systems's air water mixed injection, realize the stirring to one-level ozone catalytic oxidation pond 20, improve ozone catalytic oxidation efficiency.
Further, this industrial wastewater treatment system can also include an ozone tail gas destruction equipment 110, and ozone tail gas destruction equipment 110 passes through the pipe connection with the ozone tail gas row mouth on one-level ozone catalytic oxidation pond 20 top, can make the ozone tail gas of exhaust in one-level ozone catalytic oxidation pond 20 discharge into the atmosphere after destroying the processing like this to play the purpose of protecting the atmospheric environment.
The ozone generator 70 is respectively connected with the first-stage ozone catalytic oxidation tank 20 and the second-stage ozone catalytic oxidation tank 40 through pipelines. When the content of the refractory organic matters in the inlet water is relatively low (lower than a first pollution threshold), the ozone generator 70 only provides ozone for the secondary catalytic ozonation tank 40, and the primary catalytic ozonation tank 20 only needs to pump the ozone tail gas of the secondary catalytic ozonation tank 40 through a jet aeration system for recycling; when the content of the refractory organic matter in the inlet water is high (higher than the first pollution threshold), the first-stage ozone catalytic oxidation tank 20 needs the ozone generator 70 to additionally provide a certain amount of ozone in addition to the ozone tail gas of the second-stage ozone catalytic oxidation tank 40, so that the refractory organic matter can be efficiently converted into the easily bioavailable organic matter and can be sufficiently removed by the subsequent biological oxidation tank 30. Through the ozone utilization strategy, efficient utilization of ozone and stable standard reaching of effluent can be considered, impact load of pollutants difficult to degrade is effectively dealt with, and the whole operation cost is obviously reduced.
In this embodiment, the industrial wastewater treatment system further includes an aeration fan 80 and a back-washing fan 90, and the biological aerated filter 50 is connected to the aeration fan 80 and the back-washing fan 90 through pipes. The aeration fan 80 provides compressed air for the operation of the biological aerated filter 50, and the back washing fan 90 provides compressed air for the back washing of the biological aerated filter 50.
The biological aerated filter 50 is connected with the clean water tank 60 through a pipeline, the outlet water of the biological aerated filter 50 stably meets the discharge standard and flows into the clean water tank 60, and the clean water tank 60 provides backwashing water for the biological aerated filter 50. The biological aerated filter 50 is connected with the back flush effluent buffer pool 100 through a pipeline, and the back flush effluent of the biological aerated filter 50 firstly flows into the back flush effluent buffer pool 100 to perform homogenization adjustment on water quality and water quantity. The backwash water outlet buffer tank 100 is connected to the front end of the pretreatment system 10 through a pipeline, and the backwash water outlet is purified according to the above-mentioned industrial wastewater treatment process.
The utility model is illustrated below:
a certain industrial park is a mixed type industrial park, enterprises such as textile printing and dyeing, artificial board processing, cement production, pharmacy, printing and packaging, non-ferrous metal recovery and the like are arranged in the park, and industrial wastewater of the park mainly comes from two enterprises of textile printing and dyeing and artificial board processing. The monitoring result in 2017 in 1-10 months shows that the COD and the BOD of the inlet water of the sewage plant in the industrial park5The average concentrations of the SS, the TN and the TP are 502.5mg/L, 157.0mg/L, 391.9mg/L, 26.7mg/L and 2.3mg/L respectively, and the COD of the inlet water of the park sewage plant is seriously overproof due to the influence of the overproof discharge of enterprises. The main process of the sewage plant in the park is 'coagulating sedimentation-hydrolytic acidification-oxidation ditch', and the average COD concentration of effluent water in 1-10 months in 2017 is up to 103.0mg/L under the influence of impact of incoming water and low temperature in winter, and has obvious difference with the first-class B standard (COD is less than or equal to 60mg/L) generally executed by the current industrial sewage plant.
The effluent of the grit chamber in the industrial park is particularly used as test influent, and the actual treatment effect of the process system is inspected. The COD concentration of the effluent of the grit chamber fluctuates between 92.8 and 1365mg/L, and the COD can be reduced to 452mg/L on average after coagulating sedimentation. Then, the industrial wastewater is subjected to primary ozone catalytic oxidation, COD is reduced to 307.2mg/L on average under the action of hydroxyl free radicals, and then the industrial wastewater enters a biological oxidation tank. Due to the improvement of the biodegradability of the industrial wastewater, the biological oxidation pond can achieve an average COD removal rate of 54.2 percent, and the COD concentration in the effluent is reduced to 140.7 mg/L. And then, carrying out secondary ozone catalytic oxidation on the wastewater, reducing the COD to 88.6mg/L, and finally, carrying out fine treatment in an aeration biological filter tank, so that the COD is finally reduced to 40.3mg/L and meets the primary A emission standard (the COD is less than or equal to 50 mg/L).
In the description of the specification, reference to the description of "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above embodiments only express several embodiments of the present invention, and the description is specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (5)
1. An industrial wastewater treatment system, characterized in that: the industrial wastewater treatment system comprises a pretreatment system, a primary ozone catalytic oxidation tank, a biological oxidation tank, a secondary ozone catalytic oxidation tank, a biological aerated filter and a clean water tank which are sequentially communicated.
2. The industrial wastewater treatment system according to claim 1, wherein: the ozone catalytic oxidation pond is characterized in that the first-stage ozone catalytic oxidation pond and the second-stage ozone catalytic oxidation pond are both sealing structures, the first-stage ozone catalytic oxidation pond and the bottom of the second-stage ozone catalytic oxidation pond are both provided with ozone micropore aeration discs, the top of the first-stage ozone catalytic oxidation pond and the top of the second-stage ozone catalytic oxidation pond are provided with tail gas discharge ports, and ozone catalysts are added into the first-stage ozone catalytic oxidation pond and the second-stage ozone catalytic oxidation pond.
3. The industrial wastewater treatment system according to claim 1 or 2, characterized in that: the industrial wastewater treatment system also comprises a jet aeration system, the jet aeration system is arranged at the top of the primary ozone catalytic oxidation tank, a water inlet of the jet aeration system is positioned below the liquid level in the primary ozone catalytic oxidation tank, an air inlet of the jet aeration system is communicated with an ozone tail gas discharge port of the secondary ozone catalytic oxidation tank through a pipeline, and an air-water mixed liquid nozzle of the jet aeration system is arranged at the bottom of the primary ozone catalytic oxidation tank; the industrial wastewater treatment system further comprises an ozone generator and an ozone tail gas destruction device, wherein the ozone generator is connected to the primary ozone catalytic oxidation tank and the secondary ozone catalytic oxidation tank through an ozone conveying pipeline, and the ozone tail gas destruction device is connected to a tail gas discharge port of the primary ozone catalytic oxidation tank through a pipeline.
4. The industrial wastewater treatment system according to claim 1, wherein: the industrial wastewater treatment system also comprises an aeration fan and a back flush fan, and the biological aerated filter is respectively connected with the aeration fan and the back flush fan through pipelines.
5. The industrial wastewater treatment system according to claim 1, wherein: the industrial wastewater treatment system further comprises a back-flushing water outlet buffer tank, the biological aerated filter and the clean water tank are connected through a pipeline, wherein the clean water tank provides back-flushing water for the biological aerated filter, the biological aerated filter is communicated with the back-flushing water outlet buffer tank through a pipeline, and the back-flushing water outlet buffer tank is communicated with the front end of the pretreatment system through a pipeline.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121054130.5U CN216998058U (en) | 2021-05-17 | 2021-05-17 | Industrial wastewater treatment system |
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| CN202121054130.5U CN216998058U (en) | 2021-05-17 | 2021-05-17 | Industrial wastewater treatment system |
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| CN216998058U true CN216998058U (en) | 2022-07-19 |
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