CN112047455A - Advanced treatment system and method for sewage through catalytic ozonation - Google Patents
Advanced treatment system and method for sewage through catalytic ozonation Download PDFInfo
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- CN112047455A CN112047455A CN202011026134.2A CN202011026134A CN112047455A CN 112047455 A CN112047455 A CN 112047455A CN 202011026134 A CN202011026134 A CN 202011026134A CN 112047455 A CN112047455 A CN 112047455A
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- 230000003197 catalytic effect Effects 0.000 title claims abstract description 118
- 239000010865 sewage Substances 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims description 21
- 238000006385 ozonation reaction Methods 0.000 title claims description 16
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract description 188
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 112
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 108
- 230000003647 oxidation Effects 0.000 claims abstract description 104
- 238000012806 monitoring device Methods 0.000 claims abstract description 39
- 239000005416 organic matter Substances 0.000 claims abstract description 27
- 238000011010 flushing procedure Methods 0.000 claims abstract description 22
- 238000010521 absorption reaction Methods 0.000 claims abstract description 14
- 238000005273 aeration Methods 0.000 claims abstract description 13
- 239000007789 gas Substances 0.000 claims description 43
- 238000010992 reflux Methods 0.000 claims description 19
- 239000003054 catalyst Substances 0.000 claims description 17
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 9
- 229910052760 oxygen Inorganic materials 0.000 claims description 9
- 239000001301 oxygen Substances 0.000 claims description 9
- 239000000945 filler Substances 0.000 claims description 7
- 238000011001 backwashing Methods 0.000 claims description 6
- 238000012856 packing Methods 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 238000004065 wastewater treatment Methods 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 239000002808 molecular sieve Substances 0.000 claims description 3
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims 1
- 230000035484 reaction time Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 7
- 239000000126 substance Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000010842 industrial wastewater Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- -1 printing and dyeing Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/78—Details relating to ozone treatment devices
- C02F2201/784—Diffusers or nozzles for ozonation
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- 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)
- Chemical Kinetics & Catalysis (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The invention discloses an ozone catalytic oxidation sewage advanced treatment system, which comprises: the bottom of the ozone catalytic oxidation tank is connected with a multi-point water distribution and inlet pipeline provided with an organic matter concentration online monitoring device; the ozone generating device is connected with a multi-head micropore aeration device arranged at the bottom in the ozone catalytic oxidation tank through an ozone pipeline provided with an ozone concentration online monitoring device; the upper part of the ozone catalytic oxidation tank is provided with a water outlet pipeline, the water outlet pipeline is provided with a water outlet branch and a backflow branch, the backflow branch is connected with a backflow clean water tank, and the backflow clean water tank is connected to a multi-point water distribution and water inlet pipeline through a backflow pipeline provided with a backflow pump; the top of the ozone catalytic oxidation tank is connected with a tail gas absorption device through an ozone tail gas pipeline; the back-flushing gas pipeline is connected with a back-flushing gas distribution device arranged at the lower part in the ozone catalytic oxidation tank through the back-flushing gas pipeline. The system has more uniform water distribution and gas distribution, can flow back to prolong the reaction time, improve the utilization rate of ozone and reduce the cost.
Description
Technical Field
The invention relates to the field of advanced sewage treatment, in particular to an advanced sewage treatment system and method by catalytic ozonation.
Background
With the stricter sewage discharge standard, more and more sewage treatment plants need to increase deep process so as to reach the discharge of effluent Chemical Oxygen Demand (COD). The catalytic ozonation process is one of important processes in the advanced wastewater treatment process, and is widely concerned due to the advantages of strong oxidizability, high reaction rate, low investment, good effect, low operating cost, no secondary pollution and the like. The ozone catalytic oxidation process can effectively remove inorganic substances such as chroma, odor, taste, iron, manganese and the like in water, can obviously reduce pollutant indexes such as COD (chemical oxygen demand), TOC (total organic carbon), UV (ultraviolet) absorption value and the like of sewage, and is mainly applied to treatment of refractory organic wastewater, such as secondary effluent of sewage plants, textile, printing and dyeing, garbage leachate, industrial wastewater of pharmaceutical and chemical industries and the like.
The traditional ozone catalytic oxidation process influences the mass transfer efficiency of ozone in an ozone catalytic oxidation tank due to the reasons of uneven water and gas distribution, low ozone dissolution efficiency in a water phase and the like, so that the catalytic oxidation effect is not ideal. And the sewage is directly discharged after reacting with ozone in the reactor, so that the contact time of the sewage and the ozone is short. For industrial wastewater with high concentration of degradation-resistant organic matters in inlet water and secondary outlet water of urban sewage plants, in order to reach increasingly strict sewage discharge standards, a large amount of ozone needs to be added to remove COD in the sewage, and if the mass transfer efficiency of the ozone in a catalytic oxidation device is low, the operation cost is inevitably overhigh. The COD of the wastewater at the upstream of the ozone process section has large change fluctuation and even overhigh suspended matters, thereby causing impact load. The traditional ozone catalytic oxidation process section needs to be additionally provided with an impact load resistant facility.
Disclosure of Invention
Based on the problems in the prior art, the invention aims to provide an advanced treatment system and method for sewage through catalytic ozonation, which can solve the problems of short reaction time, high ozone consumption, low utilization rate and high treatment cost of the existing catalytic ozonation process due to uneven water and gas distribution and direct contact between ozone and sewage and discharge.
The purpose of the invention is realized by the following technical scheme:
the invention provides an ozone catalytic oxidation sewage advanced treatment system, comprising:
the system comprises an ozone catalytic oxidation tank, an organic matter concentration online monitoring device, an ozone generating device, an ozone concentration online monitoring device, a backflow clean water tank, a tail gas absorption device and a back flush air pump; wherein,
a multi-point water distribution and inlet pipeline is arranged at the bottom of the ozone catalytic oxidation tank, and the multi-point water distribution and inlet pipeline is provided with the organic matter concentration online monitoring device;
the ozone generating device is connected with a multi-head micropore aeration device arranged at the bottom in the ozone catalytic oxidation tank through an ozone pipeline provided with the ozone concentration online monitoring device;
the upper part of the ozone catalytic oxidation tank is provided with a water outlet pipeline, the water outlet pipeline is provided with a water outlet branch and a backflow branch, the backflow branch is connected with the backflow clean water tank, and the backflow clean water tank is connected to the multi-point water distribution and water inlet pipeline through a backflow pipeline provided with a backflow pump;
the top of the ozone catalytic oxidation tank is connected with the tail gas absorption device through an ozone tail gas pipeline;
the back-flushing gas circuit pipeline is connected with a back-flushing gas distribution device arranged at the lower part in the ozone catalytic oxidation tank through a back-flushing gas circuit pipeline.
The embodiment of the invention provides an advanced treatment method for sewage by catalytic ozonation, and the advanced treatment system for sewage by catalytic ozonation comprises the following steps:
sewage enters an organic matter concentration online monitoring device through a multipoint water distribution and inlet pipeline to display the concentration of refractory organic matters on line, and then enters an ozone catalytic oxidation tank;
ozone generated by an ozone generating device is fed into the ozone catalytic oxidation tank through an ozone pipeline, the ozone catalytic oxidation reaction is carried out in the ozone catalytic oxidation tank, the COD concentration of sewage is reduced, and organic matters which are difficult to degrade are converted into degradable organic matters through oxidation;
the tail gas after reaction in the ozone catalytic oxidation tank is treated by a tail gas absorption device and then is discharged;
one part of the water outlet of the ozone catalytic oxidation tank is discharged after reaching the standard through the water outlet branch of the water outlet pipeline, the other part of the water outlet enters the backflow clean water tank through the backflow branch, and the backflow clean water tank flows back to the ozone catalytic oxidation tank through the backflow pipeline and the backflow pump through the multi-point water distribution water inlet pipeline for further oxidation.
According to the technical scheme provided by the invention, the ozone catalytic oxidation sewage advanced treatment system and the method provided by the embodiment of the invention have the beneficial effects that:
by arranging a multi-point water distribution and inlet pipeline and a multi-head micropore aeration device, water is more uniformly fed into the ozone catalytic oxidation tank and ozone is more uniformly distributed, the mixing effect of ozone and sewage can be improved, and the ozone utilization rate is improved; the backflow unit between the upper end and the lower end of the ozone catalytic oxidation pond is formed by the backflow pipeline which is provided with the backflow clean water pond and the backflow pipeline which is provided with the backflow pump, so that the reaction time of sewage and ozone in the ozone catalytic oxidation pond can be effectively prolonged, the ozone utilization rate is improved, the treatment effect is better, and the cost is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
FIG. 1 is a schematic view of an ozone catalytic oxidation sewage advanced treatment system provided by an embodiment of the invention;
FIG. 2 is a schematic diagram of an ozone catalytic oxidation cell of a system provided by an embodiment of the present invention;
the parts corresponding to each mark in the figure are: 1-an ozone generating device; 2-an ozone concentration online monitoring device; 3-an ozone catalytic oxidation tank; 31-multi-head microporous aeration device; 32-backwashing gas distribution device; 33-a water distribution device; 34-a supporting layer; 35-a catalyst packing layer; 5-tail gas absorption device; 6-back flushing air pump; 7-an organic matter concentration online monitoring device; a-multi-point water distribution and water inlet pipeline; b-an ozone line; c-backwash gas line; d-ozone tail gas pipeline; e-a return line; f-an outlet line; g-water outlet branch; h-reflux branch.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the specific contents of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention. Details which are not described in detail in the embodiments of the invention belong to the prior art which is known to the person skilled in the art.
As shown in fig. 1, an embodiment of the present invention provides an advanced treatment system for sewage by catalytic oxidation of ozone, including:
the system comprises an ozone catalytic oxidation tank 3, an organic matter concentration online monitoring device 7, an ozone generating device 1, an ozone concentration online monitoring device 2, a backflow clean water tank 4, a tail gas absorption device 5 and a back flush air pump 6; wherein,
a multi-point water distribution and inlet pipeline A is arranged at the bottom of the ozone catalytic oxidation tank 3, and the organic matter concentration online monitoring device 7 is arranged on the multi-point water distribution and inlet pipeline A;
the ozone generating device 1 is connected with a multi-head micropore aeration device 31 arranged at the bottom in the ozone catalytic oxidation tank 3 through an ozone pipeline B provided with the ozone concentration online monitoring device 2;
the upper part of the ozone catalytic oxidation tank 3 is provided with a water outlet pipeline F, the water outlet pipeline F is provided with a water outlet branch and a backflow branch, the backflow branch is connected with the backflow clean water tank 4, and the backflow clean water tank 4 is connected to the multipoint water distribution and inlet pipeline A through a backflow pipeline E provided with a backflow pump;
the top of the ozone catalytic oxidation tank 3 is connected with the tail gas absorption device 5 through an ozone tail gas pipeline D;
the back-flushing gas circuit pipeline is connected with a back-flushing gas distribution device 32 arranged at the lower part in the ozone catalytic oxidation tank 3 through a back-flushing gas circuit pipeline C.
In the system, the multi-point water distribution and inlet pipeline A is communicated with the bottom of the ozone catalytic oxidation tank 3 through a plurality of water inlet branch pipes;
the multi-head micropore aeration device in the ozone catalytic oxidation tank 3 is provided with a plurality of micropore aeration heads which are arranged on the main air pipe at intervals. Thus, the uniformity of water distribution is improved by multi-point water inlet.
In the system, the back-flushing gas distribution device 32 is arranged above the multi-head microporous aeration device 31 in the ozone catalytic oxidation tank 3;
a water distribution device 33 is arranged above the backwashing gas distribution device 32, and a supporting layer 34 and a catalyst packing layer 35 paved on the supporting layer 34 are arranged on the water distribution device 33;
the water outlet of the water outlet pipeline F is positioned above the catalyst filler layer 35.
Referring to fig. 2, in the above system, the ozone catalytic oxidation tank 3 is a square tank body;
the filling height of the bearing layer is 0.3-0.45 m; the filling height of the catalyst filling layer is 0.5-3 m.
In the system, the catalyst filler of the catalyst filler layer adopts a metal-loaded spherical molecular sieve catalyst.
The above system further comprises: the control device is respectively electrically connected with the organic matter concentration online monitoring device 7, the ozone generating device 1, the ozone concentration online monitoring device 2 and the reflux pump, and can adjust the oxygen adding amount of the ozone generating device 1 to the ozone catalytic oxidation tank 3 according to the organic matter concentration detected by the organic matter concentration online monitoring device 7; and according to the ozone concentration of the ozone catalytic oxidation tank 3 detected by the ozone concentration on-line monitoring device 2, the reflux pump is started or closed. Through setting up controlling means, can realize according to organic matter concentration on-line monitoring device 7 and ozone concentration on-line monitoring device 2, the automatic control ozone dosage promotes the ozone utilization ratio, guarantees the treatment effect, and reduces the treatment cost.
According to the treatment system, the backflow unit of the ozone catalytic oxidation tank is formed by the backflow clean water tank and the backflow pipeline provided with the backflow pump, so that the reaction time of sewage and ozone in the ozone catalytic oxidation tank can be effectively prolonged, the ozone utilization rate is improved, the treatment effect is better, and the cost is reduced.
The embodiment of the invention also provides an advanced treatment method for ozone catalytic oxidation sewage, which adopts the advanced treatment system for ozone catalytic oxidation sewage and comprises the following steps:
sewage enters an organic matter concentration online monitoring device through a multipoint water distribution and inlet pipeline to display the concentration of refractory organic matters on line, and then enters an ozone catalytic oxidation tank;
ozone generated by an ozone generating device is fed into the ozone catalytic oxidation tank through an ozone pipeline, the ozone catalytic oxidation reaction is carried out in the ozone catalytic oxidation tank, the COD concentration of sewage is reduced, and organic matters which are difficult to degrade are converted into degradable organic matters through oxidation;
the tail gas after reaction in the ozone catalytic oxidation tank is treated by a tail gas absorption device and then is discharged;
one part of the water outlet of the ozone catalytic oxidation tank is discharged after reaching the standard through the water outlet branch of the water outlet pipeline, the other part of the water outlet enters the backflow clean water tank through the backflow branch, and the backflow clean water tank flows back to the ozone catalytic oxidation tank through the backflow pipeline and the backflow pump through the multi-point water distribution water inlet pipeline for further oxidation.
The method further comprises the following steps: adjusting the oxygen adding amount of the ozone generating device 1 to the ozone catalytic oxidation tank 3 according to the organic matter concentration detected by the organic matter concentration on-line monitoring device 7 through a control device; and according to the ozone concentration of the ozone catalytic oxidation tank 3 detected by the ozone concentration on-line monitoring device 2, the reflux pump is started or closed.
The embodiments of the present invention are described in further detail below.
The invention provides an ozone catalytic oxidation sewage advanced treatment system, which comprises: the system comprises an ozone generating device 1, an ozone concentration online monitoring device 2, an ozone catalytic oxidation tank 3, a backflow clean water tank 4, a tail gas absorption device 5, a flushing air pump 6 and an organic matter concentration online monitoring device 7; the whole set of process layout pipelines comprise a water inlet and outlet pipeline, an ozone tail gas pipeline, a back flushing gas circuit pipeline and a backflow pipeline;
the ozone catalytic oxidation pond preferably adopts a concrete pond body, and the materials of other device parts are 316L stainless steel materials or other ozone corrosion resistant materials.
The ozone generator 1 is an oxygen source ozone generator capable of monitoring the flow rate of the generated ozone gas.
The ozone concentration on-line monitoring device 2 can monitor the concentration of ozone generated by the ozone generating device in real time.
A multi-head microporous aeration device 31, a back-flushing gas distribution device 32, a water distribution device 33, a supporting layer 34 and a catalyst packing layer 35 are arranged in the ozone catalytic oxidation tank 3;
the ozone catalytic oxidation tank 3 is a square tank body, and the filling height of a catalyst packing layer is 0.5-3 m; the filling height of the bearing layer is 0.3-0.45 m;
the ozone catalytic oxidation process is provided with a reflux unit, the reflux unit is mainly composed of a reflux clean water tank 4 containing a reflux pump and a reflux pipeline, the reflux pump is adjusted to adjust reflux flow to change reflux ratio, partial effluent of the ozone catalytic oxidation tank 3 can be ensured to reflux to the bottom in the ozone catalytic oxidation tank 3 and react with ozone again, which is equivalent to prolonging the retention time of sewage in the ozone catalytic oxidation tank 3 and improving the COD removal efficiency of the sewage. The reflux ratio is controlled within the range of 0.4-0.8.
The lower part of the ozone catalytic oxidation tank 3 is connected with a back-flushing gas distribution device 32 extending into the device and an external back-flushing air pump 6, and the back-flushing gas distribution device and the external back-flushing air pump form back-flushing equipment of the ozone catalytic oxidation device;
the organic matter concentration on-line monitoring system 7 is positioned at the foremost end of the multi-point water distribution and inlet pipeline and can monitor the concentration of organic pollutants in inlet water on line.
The working principle of the system for deeply treating sewage is as follows:
sewage enters an organic matter concentration online monitoring system through a multipoint water distribution and water inlet pipeline to display the concentration of refractory organic matters on line, then enters an ozone catalytic oxidation tank, ozone generated by an ozone generation system is added into the ozone catalytic oxidation tank through an ozone pipeline, ozone catalytic oxidation reaction is carried out in the tank, the COD concentration of the sewage is reduced, the refractory organic matters are converted into degradable organic matters through oxidation, and the biodegradability of the sewage is improved. The tail gas after reaction is treated by a tail gas absorption system and then is exhausted;
the water outlet of the ozone catalytic oxidation tank can be divided into two paths, one path of water is discharged after reaching the standard through the water outlet branch of the water outlet pipeline, the other path of water can enter the backflow clean water tank through the backflow branch, the backflow clean water tank is connected with the ozone catalytic oxidation tank through the backflow pipeline provided with the backflow pump, and the water in the backflow clean water tank can flow back to the ozone catalytic oxidation tank through the backflow pump to be further oxidized;
through controlling means's control, when the COD clearance of intaking that organic matter concentration on-line monitoring device monitored is higher, COD requires when high, accessible ozone generating device and ozone concentration on-line monitoring device adjust the oxygen input amount of ozone catalytic oxidation pond, improve oxygen catalytic oxidation's COD and get rid of the effect to make the corresponding improvement of COD clearance of whole technology. Meanwhile, the arrangement of the backflow unit enables the sewage advanced treatment method to realize flexible and efficient operation, when the inflow water COD concentration monitored by the online organic matter concentration monitoring device is low, the backflow unit can be stopped, the ozone generation amount of the ozone generation device can be adjusted, the ozone adding amount is saved, and when the COD inflow water concentration is high, the backflow unit can be opened and used immediately. When the inflow suspended matter is too high to cause impact load, the back washing equipment can be opened to carry out air-water back washing on the filler.
In addition, the catalyst bed layer of the invention adopts a metal-loaded spherical molecular sieve catalyst, and the filler has basically no abrasion consumption, is more stable and has better catalytic effect.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. The utility model provides an ozone catalytic oxidation sewage advanced treatment system which characterized in that includes:
the system comprises an ozone catalytic oxidation tank (3), an organic matter concentration online monitoring device (7), an ozone generating device (1), an ozone concentration online monitoring device (2), a backflow clean water tank (4), a tail gas absorption device (5) and a back flush air pump (6); wherein,
a multi-point water distribution and inlet pipeline (A) is arranged at the bottom of the ozone catalytic oxidation tank (3), and the organic matter concentration online monitoring device (7) is arranged on the multi-point water distribution and inlet pipeline (A);
the ozone generating device (1) is connected with a multi-head micropore aeration device (31) arranged at the bottom in the ozone catalytic oxidation tank (3) through an ozone pipeline (B) provided with the ozone concentration online monitoring device (2);
the upper part of the ozone catalytic oxidation tank (3) is provided with a water outlet pipeline (F), the water outlet pipeline (F) is provided with a water outlet branch and a backflow branch, the backflow branch is connected with the backflow clean water tank (4), and the backflow clean water tank (4) is connected to the multi-point water distribution and inlet pipeline (A) through a backflow pipeline (E) provided with a backflow pump;
the top of the ozone catalytic oxidation tank (3) is connected with the tail gas absorption device (5) through an ozone tail gas pipeline (D);
the back-flushing gas circuit pipeline is connected with a back-flushing gas distribution device (32) arranged at the lower part in the ozone catalytic oxidation tank (3) through a back-flushing gas circuit pipeline (C).
2. The advanced ozone catalytic oxidation sewage treatment system according to claim 1, wherein the multi-point water distribution and inlet pipeline (A) is communicated with the bottom of the ozone catalytic oxidation tank (3) through a plurality of water inlet branch pipes;
the multi-head microporous aeration device in the ozone catalytic oxidation tank (3) is provided with a plurality of microporous aeration heads which are arranged on the main air pipe at intervals.
3. The advanced wastewater treatment system by catalytic ozonation according to claim 1, wherein the backwashing gas distribution device (32) is arranged above the multi-head micro-pore aeration device (31) in the catalytic ozonation tank (3);
a water distribution device (33) is arranged above the backwashing gas distribution device (32), and a supporting layer (34) and a catalyst packing layer (35) paved on the supporting layer (34) are arranged on the water distribution device (33);
the water outlet of the water outlet pipeline (F) is positioned above the catalyst packing layer (35).
4. The advanced wastewater treatment system by catalytic ozonation according to claim 1, wherein the catalytic ozonation tank (3) is a square tank body;
the filling height of the bearing layer is 0.3-0.45 m; the filling height of the catalyst filling layer is 0.5-3 m.
5. The advanced wastewater treatment system through catalytic ozonation according to claim 2 or 3, wherein the catalyst filler of the catalyst filler layer is a metal-loaded spherical molecular sieve catalyst.
6. The advanced ozone catalytic oxidation sewage treatment system according to claim 1 or 2, wherein a reflux pump is arranged on the reflux pipeline (E).
7. The ozone catalytic oxidation sewage advanced treatment system of claim 1 or 2, further comprising:
the control device is respectively electrically connected with the organic matter concentration online monitoring device (7), the ozone generating device (1), the ozone concentration online monitoring device (2) and the reflux pump, and can adjust the oxygen adding amount of the ozone generating device (1) to the ozone catalytic oxidation tank (3) according to the organic matter concentration detected by the organic matter concentration online monitoring device (7); and according to the ozone concentration of the ozone catalytic oxidation tank (3) detected by the ozone concentration online monitoring device (2), the reflux pump is started or closed.
8. An advanced treatment method for sewage through catalytic ozonation, which is characterized in that the advanced treatment system for sewage through catalytic ozonation of ozone of any one of claims 1 to 7 is adopted, and comprises the following steps:
sewage enters an organic matter concentration online monitoring device through a multipoint water distribution and inlet pipeline to display the concentration of refractory organic matters on line, and then enters an ozone catalytic oxidation tank;
ozone generated by an ozone generating device is fed into the ozone catalytic oxidation tank through an ozone pipeline, the ozone catalytic oxidation reaction is carried out in the ozone catalytic oxidation tank, the COD concentration of sewage is reduced, and organic matters which are difficult to degrade are converted into degradable organic matters through oxidation;
the tail gas after reaction in the ozone catalytic oxidation tank is treated by a tail gas absorption device and then is discharged;
one part of the water outlet of the ozone catalytic oxidation tank is discharged after reaching the standard through the water outlet branch of the water outlet pipeline, the other part of the water outlet enters the backflow clean water tank through the backflow branch, and the backflow clean water tank flows back to the ozone catalytic oxidation tank through the backflow pipeline and the backflow pump through the multi-point water distribution water inlet pipeline for further oxidation.
9. The advanced wastewater treatment method by catalytic ozonation according to claim 1, further comprising:
adjusting the oxygen adding amount of the ozone generating device (1) to the ozone catalytic oxidation tank (3) according to the organic matter concentration detected by the organic matter concentration online monitoring device (7) through a control device; and according to the ozone concentration of the ozone catalytic oxidation tank (3) detected by the ozone concentration online monitoring device (2), the reflux pump is started or closed.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113321288A (en) * | 2021-06-07 | 2021-08-31 | 浙江工业大学 | Safe treatment method for wastewater generated in production of sodium azide primary explosive |
| CN115028255A (en) * | 2022-07-08 | 2022-09-09 | 北京首创生态环保集团股份有限公司 | System and method for advanced treatment of sewage by catalytic oxidation of composite ozone |
| CN115583716A (en) * | 2022-05-07 | 2023-01-10 | 北京首创生态环保集团股份有限公司 | Serial ozone catalytic oxidation sewage treatment system and method |
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