CN214829265U - Microbubble supercharging circulation ozone catalytic oxidation reaction device - Google Patents
Microbubble supercharging circulation ozone catalytic oxidation reaction device Download PDFInfo
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- CN214829265U CN214829265U CN202023264192.7U CN202023264192U CN214829265U CN 214829265 U CN214829265 U CN 214829265U CN 202023264192 U CN202023264192 U CN 202023264192U CN 214829265 U CN214829265 U CN 214829265U
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Abstract
The utility model discloses a microbubble pressure boost circulation ozone catalytic oxidation reaction unit, including the reaction tower body, the inlet opening is reserved to tower lateral wall bottom, and the top of the tower sets up delivery port and gas vent, and the delivery port is connected the backward flow jar, and the tower body bottom is provided with gas-water mixture liquid distribution system, and upper portion is fixed with the catalytic bed through the grid board in the tower body, and the tower body bottom outside is provided with the gas-liquid mixing device, the gas-liquid mixing device on be provided with water inlet, air inlet and delivery port, wherein the water inlet with advance water piping connection, the air inlet is connected with the ozone intake pipe outside the reaction, the delivery port through the pipeline with gas-water mixture liquid distribution system link to each other, the tower body middle part is provided with the supplementary aeration equipment with ozone intake pipe connection; the effective height of the reactor is 10-20 m; the water outlet of the reflux tank is respectively connected with the water inlet pipe of the gas-liquid mixing device and the water inlet of the subsequent treatment device through pipelines. The utility model discloses ozone catalytic oxidation reaction unit has and takes up an area of for a short time, and is efficient, exempts from advantages such as backwash.
Description
Technical Field
The utility model relates to a sewage treatment field especially relates to a microbubble pressure boost circulation ozone catalytic oxidation reaction unit.
Background
With the continuous improvement of sewage discharge standard, sewage treatment technology and equipment should be continuously innovated to improve efficiency and reduce cost. Advanced oxidation technology is a common technology for advanced wastewater treatment, and comprises ozone oxidation, photocatalysis, wet oxidation and the like. Ozone as a strong oxidant has the advantages of rapid reaction, thorough degradation of organic matters, no secondary pollution and the like under the action of a catalyst. However, due to the characteristics of ozone, the ozone has low solubility in water and is easily decomposed, so that the ozone utilization efficiency is low, and most of ozone escapes or is decomposed into oxygen.
Traditional industry ozone reaction unit is mainly with the reaction tank more, and the bottom of the pool sets up aeration equipment, and this kind of reaction mode not only receives environmental impact great, and the construction cycle is long, and area is big, and mass transfer efficiency is poor and reaction efficiency is low. Compared with a reaction tank, the ozone reaction device in the form of the reaction tower has obvious advantages, the occupied area is reduced, the water depth is increased compared with the reaction tank, the utilization efficiency of ozone is improved, and the resource consumption is reduced while the reaction efficiency is improved. However, due to the limitation of the prior art, the outlet pressure of the ozone generator limits the effective height of the reaction tower to 6 meters, so that the treatment water amount of the reaction tower is limited. The traditional aeration mode is mainly provided with an aeration disc and an aeration head, the diameter of the generated bubbles is usually millimeter level or even centimeter level, the large diameter of the bubbles causes small specific surface area and low mass transfer efficiency, and the uneven distribution of the bubbles is easy to occur.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the problems of large occupied area, small outlet pressure of an ozone generator, low ozone utilization rate and the like of the traditional ozone pool, and provides a microbubble supercharging circulation ozone catalytic oxidation reaction device.
In order to realize the technical problem, the utility model provides a microbubble pressure boost circulation ozone catalytic oxidation reaction unit realizes through following technical scheme:
a microbubble pressurized circulation ozone catalytic oxidation reaction device comprises a reaction tower body, wherein a water inlet pipe opening is reserved at the bottom of the side wall of the tower, a water outlet and an air outlet are formed in the top of the tower, the water outlet is connected with a return tank, a gas-water mixed liquid distribution device is arranged at the bottom of the tower body, a catalytic bed is fixed at the middle upper part of the tower body through a grating plate, a gas-liquid mixing device is arranged outside the bottom of the tower body, a water inlet, an air inlet and a water outlet are formed in the gas-liquid mixing device, the water inlet is connected with a water inlet pipe, the air inlet is connected with an ozone inlet pipe outside the reaction, the water outlet is connected with the gas-water mixed liquid distribution device through a pipeline, and a supplementary aeration device connected with an ozone inlet pipe is arranged in the middle of the tower body; the effective height of the reactor is 10-20 m; the water outlet of the reflux tank is respectively connected with the water inlet pipe of the gas-liquid mixing device and the water inlet of the subsequent treatment device through pipelines.
The microbubble supercharging circulation ozone catalytic oxidation reaction device is preferably used, the tower body of the reaction tower is cylindrical, the height-diameter ratio is 4: 1-8: 1, and the material is oxidation-resistant metal or alloy.
Microbubble pressure boost circulation ozone catalytic oxidation reaction unit, preferred, the reaction tower body be stainless steel 304 and above.
Microbubble pressure boost circulation ozone catalytic oxidation reaction unit, preferably, the gas-water mixture liquid distribution system constitute by outer lane coil pipe and branch pipe, wherein the outer lane pipe diameter is greater than the branch pipe, outer lane pipe diameter and branch pipe intercommunication, the round hole is seted up to the branch pipe.
Microbubble pressure boost circulation ozone catalytic oxidation reaction unit, preferred, the catalyst loads highly 1/8 ~ 1/6 for the reaction tower height, the catalyst is spheroid or cylinder, diameter 3 ~ 5 mm.
Microbubble pressure boost circulation ozone catalytic oxidation reaction unit, preferred, gas-liquid mixing device dissolve the gas pitcher for circulation multiplying power is fluidic device, gas-liquid mixing pump or pressurization 1 ~ 9 times.
Compared with the prior art, the utility model discloses the more traditional ozone tower of microbubble pressure boost circulation ozone catalytic oxidation reaction unit has solved current ozone generator and has leaded to the problem that the tower height is no longer than 6 meters because the export pressure restriction, makes the area of equipment reduce greatly. The device of the utility model generates the dissolved air water rich in micro-nano bubbles by arranging the gas-liquid mixing device, the bubble specific surface area is increased due to the great reduction of the diameter of the bubbles, the rising speed, combination and breakage of the bubbles are slowed down, the ozone dissolution rate is improved, the gas-liquid mass transfer efficiency is improved, the dosage of the catalyst is reduced, the material cost is reduced, and the ozone utilization rate is greatly improved; simultaneously under the powerful impact of dissolved air water, the catalyst is difficult for hardening, and the difficult scale deposit of device internals blocks up, thereby the utility model discloses install-free backwash equipment in the device has reduced the cleaning cost.
Drawings
Fig. 1 is a schematic structural diagram of a microbubble pressurization cycle ozone catalytic oxidation reaction device in example 1.
Fig. 2 is a schematic sectional structure diagram of a gas-water mixture distribution device in a microbubble pressurization cycle ozone catalytic oxidation reaction device.
The labels in the figure are: the method comprises the following steps of 1-a tower body, 2-a gas-water mixed liquid distribution device, 3-a catalytic bed, 4-a gas-liquid mixing device, 5-a supplementary aeration device, 6-a tail gas destruction unit, 7-a reflux tank, 8-an ozone generator, 21-an outer ring coil pipe and 22-a branch pipe.
Detailed Description
The technical solution and the technical effects of the present invention will be further described in detail with reference to the drawings in the following description. The examples are provided herein for illustrative purposes only and are not intended to be limiting.
As shown in fig. 1-2, the microbubble supercharged circulating ozone catalytic oxidation reaction device of the present embodiment has an effective height of 10 to 20m, and includes a tower body 1, a gas-water mixture distribution device 2, a catalytic bed 3, a gas-liquid mixing device 4, a supplementary aeration device 5, a tail gas destruction unit 6, a reflux tank 7, and an ozone generator 8. The tower body 1 is cylindrical, the height-diameter ratio is 4: 1-8: 1, a water inlet pipe opening is reserved at the bottom of the side wall, a water outlet and an air outlet are formed in the tower top, and the water outlet is connected with a reflux tank 7. The bottom of the tower body is provided with a gas-water mixed liquid distribution device 2 which is composed of an outer ring coil pipe 21 and a branch pipe 22, wherein the diameter of the outer ring is larger than that of the branch pipe, the diameter of the outer ring is communicated with the branch pipe, and the branch pipe is provided with a round hole. A catalytic bed 3 is fixed on the middle upper part of the tower body through a grating plate, the filling height of the catalyst is 1/8-1/6 of the height of the reaction tower, and the catalyst is a sphere or a cylinder and has the diameter of 3-5 mm. The external part of the bottom of the tower body is provided with a gas-liquid mixing device 4 which consists of a jet device, a gas-liquid mixing pump or a pressurized dissolved air tank, the circulation rate of the gas-liquid mixing device is 1-9 times, the gas-liquid mixing device 4 is provided with a water inlet, a gas inlet and a water outlet, wherein the water inlet is connected with a water inlet pipe, the gas inlet is connected with an ozone inlet pipe outside the reaction, the water outlet is connected with the gas-water mixed liquid distribution device 2 through a pipeline, the middle part of the tower body is provided with a supplementary aeration device 5 connected with the ozone inlet pipe, and the supplementary aeration device is opened when the volume ratio of ozonized air of the reaction device to sewage treatment is less than 1: 3. The water outlet of the reflux tank is respectively connected with the water inlet pipe of the gas-liquid mixing device 4 and the water inlet of the subsequent treatment device through pipelines.
The utility model discloses microbubble pressure boost circulation ozone catalytic oxidation reaction unit's theory of operation as follows: ozone gas is produced by an ozone generator 8, one path of the ozone gas enters a supplementary aeration device 5, the other path of the ozone gas enters a gas-liquid mixing device 4, the gas-liquid mixing device 4 is connected with treated sewage and is uniformly released into a reaction tower through a gas-water mixed liquid distribution device 2, ozone microbubbles slowly rise from the bottom of the tower, and organic matters are decomposed under the action of ozone and a catalyst. The upper part of the tower body 1 is provided with a water outlet, the water outlet mode is overflow and enters a reflux tank 7, a wire mesh demister is arranged in the reflux tank 7 so as to prevent bubbles from being completely broken, one path of water outlet of the reflux tank is connected to a water inlet pipe of a gas-liquid mixing device, and the other path of water outlet of the reflux tank is connected to an external discharge system or the next process equipment. The gas-liquid mixing device 4 can be increased or reduced according to the actual sewage condition, and the problem that the effective height of the reaction tower is not more than 6m due to the limitation of the outlet pressure of the ozone generator is solved by using the gas-liquid mixing device. If the ozone adding amount is insufficient, the supplementary aeration device can be controlled by a valve, and the organic matter removal rate is further improved. Due to the addition of the microbubbles in the reaction system, the gas-liquid mass transfer effect is greatly enhanced, the addition amount of the catalyst can be greatly reduced, the material cost is reduced, meanwhile, under the strong impact of the microbubbles, the catalyst is not easy to harden, and the cleaning cost is reduced due to the installation-free backwashing system in the reaction device.
Example 1
A refinery sewage is treated in a 12m reactor. Raw water COD 80mg/L, pH 6.8, water yield 10m3H, ozonized air amount 9m3The residence time is 1h, the COD of the effluent is 36mg/L, and the removal rate of the COD is 55 percent.
Example 2
A membrane concentrate was treated in a 12m reactor. Raw water COD 240mg/L, water yield 14m3H, ozonized air amount 24m3The residence time is 1h, the COD of the effluent is 106mg/L, and the removal rate of the COD is 55.8 percent.
Claims (5)
1. A microbubble supercharging circulation ozone catalytic oxidation reaction device is characterized in that the effective height of the device is 10-20 m; including the reaction tower body, the mouth of pipe of intaking is reserved to tower lateral wall bottom, and the top of the tower sets up delivery port and gas vent, and the backward flow jar is connected to the delivery port, and the tower body bottom is provided with gas-water mixture liquid distribution device, and upper portion is fixed with the catalysis bed through the grid board in the tower body, and tower body bottom outside is provided with gas-liquid mixing device, gas-liquid mixing device on be provided with water inlet, air inlet and delivery port, wherein water inlet and advance water piping connection, air inlet and the outside ozone intake-tube connection of reaction, the delivery port through the pipeline with gas-water mixture liquid distribution device link to each other, the tower body middle part be provided with ozone intake-tube connection's supplementary aeration equipment, the delivery port of backward flow jar pass through the pipeline respectively with gas-liquid mixing device inlet tube, follow-up processing apparatus water inlet be connected.
2. The microbubble pressurized circulation ozone catalytic oxidation reaction device as claimed in claim 1, wherein the tower body of the reaction tower is cylindrical in shape, and the height-diameter ratio is 4: 1-8: 1.
3. The apparatus of claim 2, wherein the gas-water mixture distributor comprises an outer coil and a branch pipe, wherein the diameter of the outer coil is larger than that of the branch pipe, the outer coil is connected to the branch pipe, and the branch pipe is provided with a circular hole.
4. The apparatus of claim 1, wherein the catalyst is loaded at a height of 1/8-1/6 of the height of the reaction tower, and the catalyst is spherical or cylindrical with a diameter of 3-5 mm.
5. The microbubble pressurized circulation ozone catalytic oxidation reaction device according to claim 1, wherein the gas-liquid mixing device is a jet device, a gas-liquid mixing pump or a pressurized dissolved air tank with a circulation ratio of 1-9 times.
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| CN202023264192.7U CN214829265U (en) | 2020-12-29 | 2020-12-29 | Microbubble supercharging circulation ozone catalytic oxidation reaction device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2022143015A1 (en) * | 2020-12-29 | 2022-07-07 | 中海油天津化工研究设计院有限公司 | Micro-bubble pressurized circulating ozone catalytic oxidation reactor and method for treating waste water |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2022143015A1 (en) * | 2020-12-29 | 2022-07-07 | 中海油天津化工研究设计院有限公司 | Micro-bubble pressurized circulating ozone catalytic oxidation reactor and method for treating waste water |
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