CN212740858U - Ozone catalytic oxidation sewage advanced treatment system - Google Patents
Ozone catalytic oxidation sewage advanced treatment system Download PDFInfo
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- CN212740858U CN212740858U CN202022133740.6U CN202022133740U CN212740858U CN 212740858 U CN212740858 U CN 212740858U CN 202022133740 U CN202022133740 U CN 202022133740U CN 212740858 U CN212740858 U CN 212740858U
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Abstract
The utility model discloses an ozone catalytic oxidation sewage advanced treatment system, include: 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 utility model relates to a sewage advanced treatment field especially relates to an ozone catalytic oxidation sewage advanced treatment system.
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.
SUMMERY OF THE UTILITY MODEL
Based on the problem that prior art exists, the utility model aims at providing an ozone catalytic oxidation sewage advanced treatment system can solve current ozone catalytic oxidation technology, and the water distribution is gas distribution inhomogeneous, and ozone is discharged after with sewage direct contact for reaction time is short, exists the big and utilization ratio low of ozone consumption many times, problem that treatment cost is high.
The utility model aims at realizing through the following technical scheme:
the utility model discloses implement the sea water and provide an ozone catalytic oxidation sewage advanced treatment system, include:
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 the content of the first and second substances,
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 air pump line is connected with a back-flushing air distribution device arranged at the lower part in the ozone catalytic oxidation tank through a back-flushing air pipeline.
The embodiment of the utility model provides an ozone catalytic oxidation sewage advanced treatment method, adopt the ozone catalytic oxidation sewage advanced treatment system, including following step:
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.
By the above-mentioned the utility model provides a technical scheme can see out, the embodiment of the utility model provides an ozone catalytic oxidation sewage degree of depth processing system, its beneficial effect is:
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 used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic view of an advanced wastewater treatment system by catalytic ozonation according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an ozone catalytic oxidation tank of the system provided by the 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 will be described clearly and completely with reference to the specific contents of the present invention, and it should be understood that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiment of the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. Details not described in the embodiments of the present invention belong to the prior art known to those skilled in the art.
As shown in FIG. 1, the embodiment of the utility model provides an ozone catalytic oxidation sewage advanced treatment system, include:
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 the content of the first and second substances,
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 air pump 6 is connected with a back-flushing air distribution device 32 arranged at the lower part in the ozone catalytic oxidation tank 3 through a back-flushing air path 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 ozone 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.
The utility model discloses a processing system constitutes the backward flow unit in ozone catalytic oxidation pond through the backflow pipeline that sets up backward flow clean water basin and be equipped with the backwash pump, can effectively prolong sewage in ozone catalytic oxidation pond with the reaction time of ozone, promote the ozone utilization ratio, not only the treatment effect is better, reduce cost moreover.
The embodiment of the utility model provides a still provide an ozone catalytic oxidation sewage advanced treatment method, adopt foretell ozone catalytic oxidation sewage advanced treatment system, including following step:
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 ozone 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 on-line monitoring device 2, the reflux pump is started or closed.
The embodiments of the present invention will be described in further detail below.
The utility model provides an ozone catalytic oxidation sewage advanced treatment system, include: 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 utility model discloses the theory of operation of system advanced treatment sewage 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 ozone dosage in ozone catalytic oxidation pond, improve ozone 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 utility model discloses a catalyst bed selects for use the globular molecular sieve catalyst of load metal, and this kind of packing does not basically have the wearing and tearing consumption, and is more stable simultaneously, and catalytic effect is better.
The above description is only for the preferred embodiment of the present invention, but the protection 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 all covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
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 the content of the first and second substances,
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 air pump (6) is connected with a back-flushing air distribution device (32) arranged at the lower part in the ozone catalytic oxidation tank (3) through a back-flushing air path 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 3, 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 3 or 4, 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 ozone 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.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114229990A (en) * | 2021-12-28 | 2022-03-25 | 北京首创生态环保集团股份有限公司 | Ozone adding control system and method for ozone catalytic oxidation process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114229990A (en) * | 2021-12-28 | 2022-03-25 | 北京首创生态环保集团股份有限公司 | Ozone adding control system and method for ozone catalytic oxidation process |
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