CN212687673U - Ozone catalytic oxidation reaction tower for wastewater treatment - Google Patents
Ozone catalytic oxidation reaction tower for wastewater treatment Download PDFInfo
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- CN212687673U CN212687673U CN202021423097.4U CN202021423097U CN212687673U CN 212687673 U CN212687673 U CN 212687673U CN 202021423097 U CN202021423097 U CN 202021423097U CN 212687673 U CN212687673 U CN 212687673U
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Abstract
The utility model belongs to the technical field of waste water treatment, specificly relate to an ozone catalytic oxidation reaction tower for waste water treatment. The top end of the tower of the utility model is provided with a first feeding port, a second feeding port and a tail gas collecting and destroying device; the first feeding port is connected with the upper catalyst reaction bed through a feeding pipe, and the second feeding port is connected with the lower catalyst reaction bed through a feeding pipe; the feed pipe is connected with the backwashing water outlet pipe, and the backwashing water outlet pipe is respectively provided with a first backwashing water outlet and a second backwashing water outlet; the upper part of the upper catalyst reaction bed is provided with a screen, the bottom of the upper catalyst reaction bed is provided with a support net, and the lower part of the upper catalyst reaction bed is provided with a first water distribution pipe; the lower part of the lower catalyst reaction bed is provided with a supporting net, a second water distribution pipe, a backwashing air inlet pipe and a backwashing water inlet pipe; the upper part of the tower is provided with a circulating water outlet which is respectively connected with the first water distribution pipe and the second water distribution pipe through an ejector. The utility model provides high ozone's utilization ratio, oxidation efficiency and backwash water play water quality of water.
Description
Technical Field
The utility model belongs to the technical field of waste water treatment, specificly relate to an ozone catalytic oxidation reaction tower for waste water treatment.
Background
Nowadays, science and technology are developed day by day, and a factory is started, and industrial wastewater generated by the factory contains organic matters which are difficult to degrade. The refractory organic matters have large molecular weight, high toxicity and complex structural components, the degradation effect of common microorganisms is very little, and the refractory organic matters can generate carcinogenic, teratogenic and mutagenic effects on human bodies, and can amplify the harm by having biological accumulation, so the effective treatment of the refractory organic matters in the wastewater is a serious problem facing China.
The physical and chemical method is one of the main methods for controlling water pollution, and is often used as a pretreatment method before biochemical treatment to improve the biodegradability of water, or used in advanced treatment to remove refractory organics in residual water after biological treatment. The chemical oxidation method is a water pollution control method widely related to a plurality of physical and chemical methods, common oxidants comprise oxygen, liquid chlorine, hydrogen peroxide, ozone and the like, compared with other common oxidants, the oxidation of the ozone is strongest, the effects of decoloring, deodorizing, sterilizing, removing organic matters and inorganic matters and the like are obvious, no secondary pollution is caused, only air and electric energy are used for preparing the ozone, the operation and management are convenient, and therefore, the research and the application of ozone oxidation equipment in the aspect of wastewater treatment are gradually increased.
The oxidation of organic substances by ozone is divided into direct oxidation and hydroxyl radical oxidation generated by decomposition, and researches show that some metal elements can be used as catalysts to promote the decomposition of ozone to generate hydroxyl radicals with strong oxidizing property, so that the ozone catalytic oxidation technology is usually selected when the wastewater is treated by ozone. In addition, the solid catalyst is easy to separate from the wastewater, has less secondary pollution and is convenient for continuous operation, so that the heterogeneous ozone catalytic oxidation technology has wide application prospect.
However, the existing ozone catalytic oxidation method and device have the problems of low ozone utilization rate, unsatisfactory oxidation effect, incomplete backwashing and the like in the heterogeneous catalytic oxidation process, and the treatment effect obtained in the wastewater treatment is not favorable, so that a novel ozone catalytic oxidation device is needed to be researched to improve the utilization rate and the oxidation efficiency of ozone in the heterogeneous catalytic oxidation process and solve the problem of water quality reduction of backwash water.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model provides an ozone catalytic oxidation reaction tower for wastewater treatment, which improves the utilization rate of ozone, the oxidation efficiency and the quality of outlet water of backwash water.
The top end of the ozone catalytic oxidation reaction tower for wastewater treatment of the utility model is provided with a first feed port, a second feed port and a tail gas collecting and destroying device; the first feeding port is connected with the upper catalyst reaction bed through a feeding pipe, and the second feeding port is connected with the lower catalyst reaction bed through a feeding pipe; the feed pipe is connected with the backwashing water outlet pipe, and the backwashing water outlet pipe is respectively provided with a first backwashing water outlet and a second backwashing water outlet; the upper part of the upper catalyst reaction bed is provided with a screen, the bottom of the upper catalyst reaction bed is provided with a support net, and the lower part of the upper catalyst reaction bed is provided with a first water distribution pipe; the lower part of the lower catalyst reaction bed is provided with a supporting net, a second water distribution pipe, a backwashing air inlet pipe and a backwashing water inlet pipe; the upper part of the tower is provided with a circulating water outlet which is respectively connected with a first water distribution pipe and a second water distribution pipe through an ejector; the top of the tower is provided with an oxidized wastewater outlet.
Preferably, an overflow weir is arranged above the oxidized wastewater outlet.
Preferably, a breather valve is arranged at the top of the tower to maintain the air pressure balance in the tower.
Preferably, a circulating pump is arranged between the circulating water outlet and the ejector.
Preferably, a first flow meter is arranged between the ejector and the first water distribution pipe, a second flow meter is arranged between the ejector and the second water distribution pipe, and the water quantity controlled by the second flow meter and the water quantity controlled by the first flow meter respectively enter the lower catalyst reaction bed and the upper catalyst reaction bed in a ratio of 6: 4-9: 1.
The working process is as follows:
solid catalysts are respectively added into the upper catalyst reaction bed and the lower catalyst reaction bed through a first feeding port and a second feeding port at the top of the ozone catalytic oxidation reaction tower.
Closing the first feed port, the second feed port, the first backwashing water outlet and the second backwashing water outlet, and allowing sewage to enter from the second water distribution pipe and flow through the lower catalyst reaction bed and the upper catalyst reaction bed in sequence; the circulating pump takes water from the upper circulating water outlet, the second water distribution pipe and the first water distribution pipe intake water in a layered mode according to the proportion, sewage flows at a high speed in the pipeline after water taking, and when passing through the jet device, vacuum suction ozone is formed at the throat of the jet device, so that the ozone can be rapidly and efficiently dissolved into the sewage; the water quantity controlled by the second flowmeter and the water quantity controlled by the first flowmeter respectively enter the lower catalyst reaction bed and the upper catalyst reaction bed through the second water distribution pipe and the first water distribution pipe in a ratio of 6: 4-9: 1.
When sewage full of ozone passes through the catalyst reaction bed, organic matters in the water are efficiently oxidized, the effluent is discharged from a top oxidation wastewater outlet after passing through the overflow weir, and the residual extremely small amount of ozone in the water is subjected to harmless treatment through the tail gas collection and destruction device.
During backwashing, the oxidation wastewater outlet is closed, the second backwashing water outlet is opened, the backwashing water inlet pipe and the backwashing air inlet pipe are opened, the lower-layer catalyst reaction bed fully stirs the solid catalyst for 3-5 minutes, and the backwashing water flows out from the second backwashing water outlet; and after the backwashing of the lower catalyst reaction bed is finished, closing a second backwashing water outlet, simultaneously opening a first backwashing water outlet, starting a backwashing water inlet pipe and a backwashing air inlet pipe, fully stirring the solid catalyst for 3-5 minutes by the upper catalyst reaction bed, arranging a screen above the upper catalyst reaction bed, preventing the solid catalyst from running off during the backwashing, enabling the backwashing water to flow out from the first backwashing water outlet, and uniformly discharging the backwashing water after the confluence of the backwashing water at the first backwashing water outlet and the second backwashing water outlet.
In the process, the breathing valve maintains the air pressure balance inside the reaction tower by controlling the positive exhaust pressure and the negative suction pressure of the ozone catalytic oxidation reaction tower.
Compared with the prior art, the utility model discloses following beneficial effect has:
(1) under the action of the ejector, ozone is fully contacted with water in the form of micro bubbles, so that the ozone in a gas phase is efficiently transferred to a liquid phase, and the ozone consumed by catalytic reaction of a solid catalyst can be supplemented in time;
(2) the utility model is provided with the layered catalyst reaction bed, ozone gas enters the upper catalyst reaction bed and the lower catalyst reaction bed through the ejector respectively, thus avoiding the pressure-holding load to the ozone end due to the overlarge resistance of the whole bed layer and protecting the ozone generator system;
(3) ozone is uniformly distributed in two sections, and the combined catalyst reaction bed layer directly acts on the wastewater, so that the time for effectively oxidizing the wastewater by the combination of the ozone and the solid catalyst is prolonged, and the effective utilization rate of the ozone component is improved;
(4) the catalyst reaction bed is backwashed independently according to the order of lower floor earlier back upper strata, has guaranteed the effect of backwash water and backwash gas, and catalyst individual layer reaction bed height is low, and the backwash expansion space is left at the top, and when the backwash was opened, the catalyst reaction bed fully stirred, rolled, self-cleaning, guaranteed the catalytic bed effect, avoided not thorough because of the compact backwash of knot, the effect of water outlet is poor.
Drawings
FIG. 1 is a front view of an ozone catalytic oxidation reaction tower for wastewater treatment according to the present invention;
FIG. 2 is a side view of the catalytic ozonation reactor for wastewater treatment of the present invention;
FIG. 3 is a top view of the catalytic ozonation reactor for wastewater treatment according to the present invention;
in the figure: 1. the device comprises a first feed port, a second feed port, a tail gas collecting and destroying device, 4, a breather valve, 5, an overflow weir, 6, an oxidation wastewater outlet, 7, a first backwashing water outlet, 8, a second backwashing water outlet, 9, a circulating water outlet, 10, a screen, 11, an upper catalyst reaction bed, 12, a first water distributor, 13, a circulating pump, 14, an ejector, 15, a first flowmeter, 16, a second flowmeter, 17, a lower catalyst reaction bed, 18, a backwashing air inlet pipe, 19, a second water distributor, 20 and a backwashing water inlet pipe.
Detailed Description
The present invention will be further described with reference to the following examples.
As shown in fig. 1-3, the top end of the catalytic ozonation reaction tower for wastewater treatment is provided with a first feeding port 1, a second feeding port 2, and a tail gas collecting and destroying device 3; the first feeding port 1 is connected with the upper catalyst reaction bed 11 through a feeding pipe, and the second feeding port 2 is connected with the lower catalyst reaction bed 17 through a feeding pipe; the feed pipe is connected with a backwashing water outlet pipe, and a first backwashing water outlet 7 and a second backwashing water outlet 8 are respectively arranged on the backwashing water outlet pipe; the upper part of the upper catalyst reaction bed 11 is provided with a screen 10, the bottom of the upper catalyst reaction bed is provided with a supporting net, and the lower part of the upper catalyst reaction bed 11 is provided with a first water distribution pipe 12; the lower part of the lower catalyst reaction bed 17 is provided with a supporting net, a second water distribution pipe 19, a backwashing air inlet pipe 18 and a backwashing water inlet pipe 20; the upper part of the tower is provided with a circulating water outlet 9, and the circulating water outlet 9 is respectively connected with a first water distribution pipe 12 and a second water distribution pipe 19 through an ejector 14; the top of the tower is provided with an oxidized wastewater outlet 6.
And an overflow weir 5 is arranged above the oxidized wastewater outlet 6.
And a breather valve 4 is arranged at the top of the tower.
And a circulating pump 13 is arranged between the circulating water outlet 9 and the ejector 14.
A first flowmeter 15 is arranged between the ejector 14 and the first water distribution pipe 12, and a second flowmeter 16 is arranged between the ejector 14 and the second water distribution pipe 19.
Example 1
Chemical wastewater of a certain equipment company: COD was 110 mg/L.
Solid catalyst is respectively added into an upper catalyst reaction bed 11 and a lower catalyst reaction bed 17 through a first feeding port 1 and a second feeding port 2 at the top of the ozone catalytic oxidation reaction tower.
Closing the first feed port 1, the second feed port 2, the first backwashing water outlet 7 and the second backwashing water outlet 8, and allowing sewage to enter from the second water distribution pipe 19 and flow through the lower catalyst reaction bed 17 and the upper catalyst reaction bed 11 in sequence; the circulating pump 13 takes water from the upper circulating water outlet 9, sewage flows at a high speed in the pipeline after taking water, and when passing through the ejector 14, vacuum suction ozone is formed at the throat of the ejector 14, so that ozone can be quickly and efficiently dissolved into the sewage; the second flow meter 16 and the first flow meter 15 control the amount of water to be 8: 2 into the lower catalyst reaction bed 17 and the upper catalyst reaction bed 11 through the second water distribution pipe 19 and the first water distribution pipe 12, respectively.
When sewage full of ozone passes through the lower catalyst reaction bed 17 and the upper catalyst reaction bed 11, organic matters in the water are efficiently oxidized, the effluent water is discharged from the top oxidation wastewater outlet 6 after passing through the overflow weir 5, and the residual ozone in the water is subjected to harmless treatment through the tail gas collecting and destroying device 3.
During backwashing, the oxidation wastewater water outlet 6 is closed, the second backwashing water outlet 8 is opened, the backwashing water inlet pipe 20 and the backwashing air inlet pipe 18 are opened, the lower-layer catalyst reaction bed 17 fully stirs the solid catalyst for 4 minutes, and the backwashing water flows out from the second backwashing water outlet 8; and after the backwashing of the lower catalyst reaction bed 17 is finished, closing a second backwashing water outlet 8, simultaneously opening a first backwashing water outlet 7, starting a backwashing water inlet pipe 20 and a backwashing air inlet pipe 18, fully stirring the solid catalyst for 3 minutes by the upper catalyst reaction bed 11, setting a screen 10 above the upper catalyst reaction bed 11, preventing the loss of the solid catalyst during the backwashing, enabling water after the backwashing to flow out from the first backwashing water outlet 7, and uniformly discharging the effluent of the first backwashing water outlet 7 and the second backwashing water outlet 8 after converging.
In the above process, the breather valve 4 maintains the pressure balance inside the reaction tower by controlling the positive exhaust pressure and the negative suction pressure of the ozone catalytic oxidation reaction tower.
The COD of the effluent is 37mg/L, and the treatment cost is 1.1 yuan/m3。
Example 2
Wastewater from a certain printing and dyeing plant: COD was 330 mg/L.
Solid catalyst is respectively added into an upper catalyst reaction bed 11 and a lower catalyst reaction bed 17 through a first feeding port 1 and a second feeding port 2 at the top of the ozone catalytic oxidation reaction tower.
Closing the first feed port 1, the second feed port 2, the first backwashing water outlet 7 and the second backwashing water outlet 8, and allowing sewage to enter from the second water distribution pipe 19 and flow through the lower catalyst reaction bed 17 and the upper catalyst reaction bed 11 in sequence; the circulating pump 13 takes water from the upper circulating water outlet 9, sewage flows at a high speed in the pipeline after taking water, and when passing through the ejector 14, vacuum suction ozone is formed at the throat of the ejector 14, so that ozone can be quickly and efficiently dissolved into the sewage; the second flow meter 16 and the first flow meter 15 control the amount of water to be 7: 3 into the lower catalyst reaction bed 17 and the upper catalyst reaction bed 11 through the second water distribution pipe 19 and the first water distribution pipe 12, respectively.
When sewage full of ozone passes through the lower catalyst reaction bed 17 and the upper catalyst reaction bed 11, organic matters in the water are efficiently oxidized, the effluent water is discharged from the top oxidation wastewater outlet 6 after passing through the overflow weir 5, and the residual ozone in the water is subjected to harmless treatment through the tail gas collecting and destroying device 3.
During backwashing, the oxidation wastewater water outlet 6 is closed, the second backwashing water outlet 8 is opened, the backwashing water inlet pipe 20 and the backwashing air inlet pipe 18 are opened, the lower-layer catalyst reaction bed 17 fully stirs the solid catalyst for 5 minutes, and the backwashing water flows out from the second backwashing water outlet 8; and after the backwashing of the lower catalyst reaction bed 17 is finished, closing a second backwashing water outlet 8, simultaneously opening a first backwashing water outlet 7, starting a backwashing water inlet pipe 20 and a backwashing air inlet pipe 18, fully stirring 4 minutes of solid catalyst by the upper catalyst reaction bed 11, setting a screen 10 above the upper catalyst reaction bed 11, preventing the loss of the solid catalyst during the backwashing, enabling water after the backwashing to flow out from the first backwashing water outlet 7, and uniformly discharging the effluent of the first backwashing water outlet 7 and the second backwashing water outlet 8 after converging.
In the above process, the breather valve 4 maintains the pressure balance inside the reaction tower by controlling the positive exhaust pressure and the negative suction pressure of the ozone catalytic oxidation reaction tower.
The COD of the effluent is 48mg/L, and the treatment cost is 2.2 yuan/m3。
Example 3
Wastewater from a certain chemical plant: the COD was 155 mg/L.
Solid catalyst is respectively added into an upper catalyst reaction bed 11 and a lower catalyst reaction bed 17 through a first feeding port 1 and a second feeding port 2 at the top of the ozone catalytic oxidation reaction tower.
Closing the first feed port 1, the second feed port 2, the first backwashing water outlet 7 and the second backwashing water outlet 8, and allowing sewage to enter from the second water distribution pipe 19 and flow through the lower catalyst reaction bed 17 and the upper catalyst reaction bed 11 in sequence; the circulating pump 13 takes water from the upper circulating water outlet 9, sewage flows at a high speed in the pipeline after taking water, and when passing through the ejector 14, vacuum suction ozone is formed at the throat of the ejector 14, so that ozone can be quickly and efficiently dissolved into the sewage; the second flow meter 16 and the first flow meter 15 control the amount of water to be 6:4 into the lower catalyst reaction bed 17 and the upper catalyst reaction bed 11 through the second water distribution pipe 19 and the first water distribution pipe 12, respectively.
When sewage full of ozone passes through the lower catalyst reaction bed 17 and the upper catalyst reaction bed 11, organic matters in the water are efficiently oxidized, the effluent water is discharged from the top oxidation wastewater outlet 6 after passing through the overflow weir 5, and the residual ozone in the water is subjected to harmless treatment through the tail gas collecting and destroying device 3.
During backwashing, the oxidation wastewater water outlet 6 is closed, the second backwashing water outlet 8 is opened, the backwashing water inlet pipe 20 and the backwashing air inlet pipe 18 are opened, the lower-layer catalyst reaction bed 17 fully stirs the solid catalyst for 3 minutes, and the backwashing water flows out from the second backwashing water outlet 8; and after the backwashing of the lower catalyst reaction bed 17 is finished, closing a second backwashing water outlet 8, simultaneously opening a first backwashing water outlet 7, starting a backwashing water inlet pipe 20 and a backwashing air inlet pipe 18, fully stirring the solid catalyst for 5 minutes by the upper catalyst reaction bed 11, setting a screen 10 above the upper catalyst reaction bed 11, preventing the loss of the solid catalyst during the backwashing, enabling the water after the backwashing to flow out from the first backwashing water outlet 7, and uniformly discharging the water after the water outlet of the first backwashing water outlet 7 and the water outlet of the second backwashing water outlet 8 are converged.
In the above process, the breather valve 4 maintains the pressure balance inside the reaction tower by controlling the positive exhaust pressure and the negative suction pressure of the ozone catalytic oxidation reaction tower.
The COD of the effluent is 45mg/L, and the treatment cost is 1.6 yuan/m3。
Of course, the above description is only a preferred embodiment of the present invention, and should not be taken as limiting the scope of the embodiments of the present invention. The present invention is not limited to the above examples, and the technical field of the present invention is equivalent to the changes and improvements made in the actual range of the present invention, which should be attributed to the patent coverage of the present invention.
Claims (5)
1. The utility model provides an ozone catalytic oxidation reaction tower for waste water treatment which characterized in that: the top end of the tower is provided with a first feeding port (1), a second feeding port (2) and a tail gas collecting and destroying device (3); the first feeding port (1) is connected with the upper catalyst reaction bed (11) through a feeding pipe, and the second feeding port (2) is connected with the lower catalyst reaction bed (17) through a feeding pipe; the feed pipe is connected with the backwashing water outlet pipe, and the backwashing water outlet pipe is respectively provided with a first backwashing water outlet (7) and a second backwashing water outlet (8); the upper part of the upper catalyst reaction bed (11) is provided with a screen (10), the bottom of the upper catalyst reaction bed is provided with a supporting net, and the lower part of the upper catalyst reaction bed is provided with a first water distribution pipe (12); the lower part of the lower catalyst reaction bed (17) is provided with a supporting net, a second water distribution pipe (19), a backwashing air inlet pipe (18) and a backwashing water inlet pipe (20); a circulating water outlet (9) is arranged at the upper part of the tower, and the circulating water outlet (9) is respectively connected with a first water distribution pipe (12) and a second water distribution pipe (19) through an ejector (14); the top of the tower is provided with an oxidized wastewater outlet (6).
2. The catalytic ozonation reactor column of claim 1, wherein: the top of the tower is provided with a breather valve (4).
3. The catalytic ozonation reactor column of claim 1, wherein: a circulating pump (13) is arranged between the circulating water outlet (9) and the ejector (14).
4. The catalytic ozonation reactor column of claim 1, wherein: a first flowmeter (15) is arranged between the ejector (14) and the first water distribution pipe (12), and a second flowmeter (16) is arranged between the ejector (14) and the second water distribution pipe (19).
5. The catalytic ozonation reactor column of claim 1, wherein: an overflow weir (5) is arranged above the oxidized wastewater outlet (6).
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| CN202021423097.4U CN212687673U (en) | 2020-07-17 | 2020-07-17 | Ozone catalytic oxidation reaction tower for wastewater treatment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113788560A (en) * | 2021-09-17 | 2021-12-14 | 陕西华陆化工环保有限公司 | Ozone catalytic oxidation system for advanced wastewater treatment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113788560A (en) * | 2021-09-17 | 2021-12-14 | 陕西华陆化工环保有限公司 | Ozone catalytic oxidation system for advanced wastewater treatment |
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