Homogeneous catalytic ozonation pond and sewage treatment system

Abstract

The utility model discloses a homogeneous catalytic ozonation pond which comprises a pond body and a homogeneous catalytic reactor, and further comprises a sewage inlet pipe, a sewage outlet pipe and a plurality of vertical baffles which are positioned in the pond body and are used for vertically turning back sewage, the sewage inlet pipe and the sewage outlet pipe are located on the left side and the right side of the tank body respectively, the homogeneous catalytic reactor is arranged in the tank body on the sewage inlet pipe side, and sewage to be treated flows through the homogeneous catalytic reactor after flowing in from the sewage inlet pipe; a plurality of transverse baffles for transversely turning back the sewage are also arranged between every two adjacent vertical baffles. The utility model also discloses a homogeneous catalytic ozonation sewage treatment system. According to the homogeneous catalytic ozonation sewage treatment system disclosed by the utility model, under the condition of the same tank volume, the contact time of ozone and water is prolonged, and the collision probability is increased, so that the ozone utilization efficiency is improved, the ozone adding amount is reduced, the operation cost is reduced, and the COD (Chemical Oxygen Demand) removal efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of water treatment, in particular to a homogeneous ozone catalytic oxidation tank and a sewage treatment system. Background Art

[0002] At present, the pollutants in many wastewater deep treatment stages are mainly soluble and difficult to biodegrade organic matter. Therefore, an advanced oxidation process should be added to the deep treatment process to further remove organic pollutants through advanced oxidation to ensure that the wastewater meets the discharge standards after treatment. Common oxidants are H2O2, ClO2, KMnO4, etc.; among them, ozone has a strong oxidizing ability. Ozone mainly reacts with organic matter in two ways: a direct oxidation between ozone molecules and organic pollutants; a hydroxyl radical (·OH) produced after ozone decomposition reacts with organic matter in water; the mass transfer efficiency of ozone oxidation technology is low, resulting in low utilization of odor, and ozone is selective in the degradation of organic matter, and has poor degradation effect on some organic matter. In response to the problems of ozone oxidation alone, researchers at home and abroad have proposed ozone catalytic oxidation technology. Ozone catalytic oxidation is to increase the rate and quality of ·OH generation during the reaction process by adding catalysts, thereby improving the ozone oxidation effect.

[0003] Ozone catalytic oxidation is divided into two categories: homogeneous oxidation and heterogeneous oxidation. Homogeneous catalytic oxidation is the process of using a liquid catalyst (metal ion Fe 3+ , Mn 2+ 、Co 2+ , H2O2, etc.) are added to the ozone oxidation system, which is the homogeneous catalytic ozone catalytic process. Heterogeneous catalytic oxidation is to add solid catalysts to the ozone oxidation system to improve the ozone oxidation capacity. The catalysts involved are mainly divided into three types: supported agents (ceramsite, Al2O3 carrier, etc.), metal oxides (MnO2, ZnO, TiO2, etc.), porous materials (active groups, zeolites, etc.).

[0004] Homogeneous ozone catalytic oxidation tank is a water (wastewater) treatment device that uses ozone catalytic oxidation technology to oxidize organic matter in water and remove residual harmful substances and corrosive gases. It is mainly composed of a reaction tank, a gas-liquid separator, a nozzle and an exhaust port. In existing homogeneous ozone catalytic oxidation tanks, the residence time of ozone in water is short, the collision between ozone and pollutants is insufficient, and the ozone utilization efficiency is low. Summary of the invention

[0005] The utility model solves the technical problems existing in the known technology and provides a homogeneous ozone catalytic oxidation tank and a sewage treatment system, which can prolong the residence time of ozone in water, increase the collision probability between ozone and pollutants, and improve the COD removal effect.

[0006] The technical solution adopted by the utility model to solve the technical problems existing in the known technology is:

[0007] A homogeneous ozone catalytic oxidation tank comprises a tank body and a homogeneous catalytic reactor, and also comprises a sewage inlet pipe, a sewage outlet pipe and a plurality of vertical baffles located in the tank body for vertically turning back the sewage; the sewage inlet pipe and the sewage outlet pipe are respectively located on the left and right sides of the tank body, and the homogeneous catalytic reactor is arranged in the tank body on the side of the sewage inlet pipe, and after the sewage to be treated flows into the tank from the sewage inlet pipe, it flows through the homogeneous catalytic reactor; a plurality of transverse baffles are also arranged between two adjacent vertical baffles for horizontally turning back the sewage.

[0008] Furthermore, two upper and lower transverse baffles are provided between two adjacent vertical baffles.

[0009] Furthermore, two adjacent vertical baffles are provided as vertical baffle A and vertical baffle B; sewage flows in from below vertical baffle A and flows out from above vertical baffle B; the horizontal baffle located below is connected to vertical baffle A; the horizontal baffle located above is connected to vertical baffle B.

[0010] Furthermore, the transverse baffle has an upward inclination angle of 1 to 2 degrees with respect to the horizontal direction along the water flow direction.

[0011] The utility model also provides a homogeneous ozone catalytic oxidation sewage treatment system, and the sewage treatment system comprises the above-mentioned homogeneous ozone catalytic oxidation tank.

[0012] Furthermore, it also includes an ozone input pipe, a reflux pressure pump, a jet dissolved gas device and an ozone aeration device; the reflux pressure pump is used to return the sewage from the output area to the input area; the jet dissolved gas device is used to mix ozone and the reflux sewage evenly to form a saturated dissolved gas liquid; the ozone aeration device is used to aerate the saturated dissolved gas liquid in the sewage in the pool body; the input port of the reflux pressure pump is located in the pool body below the pipe port of the sewage outlet pipe; the jet dissolved gas device is provided with an air inlet, a liquid inlet and a liquid outlet; the air inlet of the jet dissolved gas device is connected to the ozone input pipe, the liquid inlet of the jet dissolved gas device is connected to the output port of the reflux pressure pump, and the liquid outlet of the jet dissolved gas device is connected to the input port of the ozone aeration device; the output port of the ozone aeration device is located at the vertical and / or horizontal return corner of the sewage.

[0013] Furthermore, it also includes an ozone tail gas destruction device, which is used to treat the ozone tail gas, decompose the residual ozone gas and then discharge it into the atmosphere; the input port of the ozone tail gas destruction device is located in the upper cavity of the pool body.

[0014] Furthermore, it also includes a pressure balancing valve, which is used to adjust the gas pressure in the upper cavity of the pool body; the input port of the pressure balancing valve is located in the upper cavity of the pool body.

[0015] The advantages and positive effects of the utility model are as follows: the utility model is provided with a homogeneous ozone catalytic oxidation pool that allows sewage to be turned back vertically and horizontally, and has the advantages of long contact time between ozone and water, sufficient collision, and good COD removal effect. The area between two adjacent vertical baffles is divided into several sections from top to bottom by multiple horizontal baffles, and the ozone dosage ratio of each section increases from bottom to top. Under the condition of the same pool capacity, the contact time between ozone and water is increased, the collision probability is expanded, thereby improving the ozone utilization efficiency, reducing the ozone dosage, and reducing the operating cost. The COD removal efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The utility model is a schematic diagram of the structure of a homogeneous ozone catalytic oxidation sewage treatment system.

[0017] In the figure: 1. sewage inlet pipe; 2. tank body; 3. homogeneous catalytic reactor; 4. ozone input pipe; 5. jet aeration device; 6. pressure balance valve; 7. upper cavity of tank body; 8. reflux booster pump; 9. ozone tail gas destruction device; 10. sewage outlet pipe; 11. first vertical baffle; 12. ozone aeration device; 13. second vertical baffle; 14. upper horizontal baffle; 15. lower horizontal baffle; 16. third vertical baffle; 17. input port of reflux booster pump. DETAILED DESCRIPTION

[0018] In order to further understand the content, features and effects of the present invention, the following embodiments are listed and described in detail with reference to the accompanying drawings:

[0019] The terms "connected" and "connection" used in the present invention should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection; it can be directly connected or indirectly connected through an intermediate component. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0020] See also Figure 1 A homogeneous ozone catalytic oxidation tank includes a tank body 2 and a homogeneous catalytic reactor 3, and also includes a sewage inlet pipe 1, a sewage outlet pipe 10 and a plurality of vertical baffles located in the tank body 2 for vertically turning back the sewage; the sewage inlet pipe 1 and the sewage outlet pipe 10 are located on the left and right sides of the tank body 2 respectively, and the homogeneous catalytic reactor 3 is arranged in the tank body 2 on the side of the sewage inlet pipe 1, and the sewage to be treated flows into the homogeneous catalytic reactor 3 after flowing into the sewage inlet pipe 1; and a plurality of transverse baffles are also arranged between two adjacent vertical baffles for horizontally turning back the sewage. Transverse turning back means turning back in the horizontal direction, and vertical turning back means turning back perpendicular to the horizontal direction.

[0021] Preferably, two upper and lower transverse baffles may be provided between two adjacent vertical baffles.

[0022] Preferably, two adjacent vertical baffles may be provided as vertical baffle A and vertical baffle B; sewage flows in from below vertical baffle A and flows out from above vertical baffle B; the horizontal baffle located below is connected to vertical baffle A; the horizontal baffle located above is connected to vertical baffle B.

[0023] Preferably, the transverse baffle may have an upward inclination angle of 1 to 2° with respect to the horizontal direction along the water flow direction.

[0024] The utility model also provides an embodiment of a homogeneous ozone catalytic oxidation sewage treatment system, and the sewage treatment system comprises the above-mentioned homogeneous ozone catalytic oxidation tank.

[0025] Preferably, the sewage treatment system may also include an ozone input pipe 4, a reflux pressure pump 8, a jet gas dissolving device 5 and an ozone aeration device 12; the reflux pressure pump 8 can be used to return the sewage from the output area to the input area; the jet gas dissolving device 5 can be used to evenly mix ozone with the reflux sewage to form a saturated dissolved gas liquid; the ozone aeration device 12 can be used to aerate the saturated dissolved gas liquid in the sewage in the tank body 2; the input port 17 of the reflux pressure pump can be located in the tank body 2 below the pipe mouth of the sewage outlet pipe 10; the jet gas dissolving device 5 is provided with an air inlet, a liquid inlet and a liquid outlet; the air inlet of the jet gas dissolving device 5 is connected to the ozone input pipe 4, the liquid inlet of the jet gas dissolving device 5 is connected to the output port of the reflux pressure pump 8, and the liquid outlet of the jet gas dissolving device 5 is connected to the input port of the ozone aeration device 12; the output port of the ozone aeration device 12 can be located at the vertical and / or horizontal return corner of the sewage.

[0026] Preferably, the sewage treatment system may further include an ozone tail gas destruction device 9, which can be used to treat ozone tail gas, decompose the residual ozone gas and then discharge it into the atmosphere; the input port of the ozone tail gas destruction device 9 may be located in the upper cavity 7 of the tank body.

[0027] Preferably, the sewage treatment system may further include a pressure balancing valve 6 , which can be used to adjust the gas pressure in the upper cavity 7 of the tank body; the input port of the pressure balancing valve 6 is located in the upper cavity 7 of the tank body.

[0028] The structure and working principle of the utility model are further explained below with a preferred embodiment of a homogeneous ozone catalytic oxidation sewage treatment system of the utility model:

[0029] A homogeneous ozone catalytic oxidation sewage treatment system, the sewage treatment system includes a homogeneous ozone catalytic oxidation tank. The homogeneous ozone catalytic oxidation tank includes a tank body 2, a homogeneous catalytic reactor 3, a sewage inlet pipe 1, a sewage outlet pipe 10 and three vertical baffles located in the tank body 2 for vertically folding the sewage; the sewage inlet pipe 1 and the sewage outlet pipe 10 are respectively located on the left and right sides of the tank body 2, the homogeneous catalytic reactor 3 is arranged in the tank body 2 on the side of the sewage inlet pipe 1, and the sewage to be treated flows into the sewage inlet pipe 1 and flows through the homogeneous catalytic reactor 3; two horizontal baffles are also arranged between the two adjacent vertical baffles, the second vertical baffle 13 and the third vertical baffle 16 from the left, for horizontally folding the sewage. The two horizontal baffles are placed up and down.

[0030] The sewage treatment system also includes an ozone input pipe 4, a reflux pressure pump 8, a jet gas dissolving device 5 and an ozone aeration device 12; the reflux pressure pump 8 is used to return the sewage from the output area to the input area; the jet gas dissolving device 5 is used to mix ozone and the reflux sewage evenly to form a saturated dissolved gas liquid; the ozone aeration device 12 is used to aerate the saturated dissolved gas liquid in the sewage in the tank body 2; the input port 17 of the reflux pressure pump is located in the tank body 2 below the pipe port of the sewage outlet pipe 10; the jet gas dissolving device 5 is provided with an air inlet, a liquid inlet and a liquid outlet; the air inlet of the jet gas dissolving device 5 is connected to the ozone input pipe 4, the liquid inlet of the jet gas dissolving device 5 is connected to the output port of the reflux pressure pump 8, and the liquid outlet of the jet gas dissolving device 5 is connected to the input port of the ozone aeration device 12; the output port of the ozone aeration device 12 is located at the vertical and / or horizontal return corner of the sewage.

[0031] The sewage treatment system also includes an ozone tail gas destruction device 9, which is used to treat ozone tail gas, decompose the residual ozone gas and then discharge it into the atmosphere; the input port of the ozone tail gas destruction device 9 is located in the upper cavity 7 of the tank body.

[0032] The sewage treatment system further comprises a pressure balancing valve 6 , which is used to adjust the gas pressure in the upper cavity 7 of the tank body; the input port of the pressure balancing valve 6 is located in the upper cavity 7 of the tank body.

[0033] The working principle of the utility model is as follows:

[0034] When no transverse baffle is set between two adjacent vertical baffles, the sewage to be treated flows in from the sewage inlet pipe 1, flows through the homogeneous catalytic reactor 3, and then turns back vertically between each vertical baffle in turn and flows out from the outlet pipe. Assuming that there are three vertical baffles in the tank body 2, from the left, they are the first vertical baffle 11, the second vertical baffle 13, and the third vertical baffle 16; when no transverse baffle is set between the vertical baffles, the specific sewage flow direction is as follows:

[0035] The sewage in the area formed by the first vertical baffle 11 and the side wall of the pool body 2 turns back downward from above the first vertical baffle 11 and enters the area between the first vertical baffle 11 and the second vertical baffle 13; then turns back upward from below the second vertical baffle 13 and flows into the area between the second vertical baffle 13 and the third vertical baffle 16; then turns back from above the third vertical baffle 16 and flows into the area formed by the third vertical baffle 16 and the side wall of the pool body 2, and then is discharged from the sewage outlet pipe 10.

[0036] When a plurality of transverse baffles for turning sewage laterally are arranged between one or several groups of two adjacent vertical baffles, the sewage flowing between the two adjacent vertical baffles of the group is turned laterally horizontally in sequence from top to bottom or from bottom to top along the transverse baffles.

[0037] for example Figure 1 , the tank body 2 is provided with three vertical baffles, which are the first vertical baffle 11, the second vertical baffle 13, and the third vertical baffle 16 from the left; two transverse baffles are provided between the adjacent second vertical baffles 13 and the third vertical baffle 16, which are respectively called the upper transverse baffle 14 and the lower transverse baffle 15; after the sewage to be treated flows into the sewage inlet pipe 1, it flows through the homogeneous catalytic reactor 3, and then returns from above the first vertical baffle 11 to flow into the area between the first vertical baffle 11 and the second vertical baffle 13; returns from below the second vertical baffle 13 to flow into the area between the second vertical baffle 13 and the third vertical baffle 16; the upper transverse baffle The plate 14 and the lower transverse baffle 15 divide the area between the second vertical baffle 13 and the third vertical baffle 16 into three areas: upper, middle and lower areas; they are respectively called the upper section of the ozone catalytic oxidation tank, the middle section of the ozone catalytic oxidation tank and the lower section of the ozone catalytic oxidation tank; the sewage flows into the lower section of the ozone catalytic oxidation tank from below the second vertical baffle 13, then turns back to the left from the right end of the lower transverse baffle 15 to enter the middle section of the ozone catalytic oxidation tank, and then continues to turn back to the right from the left end of the upper transverse baffle 14 to enter the upper section of the ozone catalytic oxidation tank; it turns back from above the third vertical baffle 16 on the right side of the upper section of the ozone catalytic oxidation tank to the area formed by the third vertical baffle 16 and the side wall of the tank body 2. Then it is discharged from the sewage outlet pipe 10.

[0038] The utility model is provided with a homogeneous ozone catalytic oxidation tank which enables sewage to be turned back vertically and horizontally, and has the advantages of long contact time between ozone and water, sufficient collision, good COD removal effect, and the like.

[0039] The water flow pattern in the upper section, middle section and lower section of the ozone catalytic oxidation pool is horizontal reciprocating flow. In order to further improve the ozone utilization efficiency, the ozone dosage ratio in the first section of the ozone catalytic oxidation pool can be increased to 60% to 65%, the middle section of the ozone catalytic oxidation pool is maintained at 25%, and the rear section of the ozone catalytic oxidation pool can be reduced to 10% to 15%.

[0040] The above-mentioned sewage inlet pipe 1, tank body 2, homogeneous catalytic reactor 3, ozone input pipe 4, jet gas dissolving device 5, pressure balancing valve 6, reflux booster pump 8, ozone tail gas destruction device 9, sewage outlet pipe 10, ozone aeration device 12 and other parts and devices in the utility model can adopt the parts and devices applicable in the prior art, or adopt the parts and devices applicable in the prior art and adopt conventional technical means to construct.

[0041] The embodiments described above are only used to illustrate the technical ideas and features of the utility model, and their purpose is to enable technicians in the field to understand the content of the utility model and implement it accordingly. The patent scope of the utility model cannot be limited only by this embodiment, that is, any equivalent changes or modifications made to the spirit disclosed by the utility model still fall within the patent scope of the utility model.

Claims

1. A homogeneous ozone catalytic oxidation tank, comprising a tank body and a homogeneous catalytic reactor, characterized in that: It also includes a sewage inlet pipe, a sewage outlet pipe and a plurality of vertical baffles located in the tank body for vertically bending the sewage; the sewage inlet pipe and the sewage outlet pipe are respectively located on the left and right sides of the tank body, and the homogeneous catalytic reactor is arranged in the tank body on the side of the sewage inlet pipe. After the sewage to be treated flows into the tank from the sewage inlet pipe, it flows through the homogeneous catalytic reactor; a plurality of horizontal baffles are also arranged between two adjacent vertical baffles for horizontally bending the sewage.

2. The homogeneous ozone catalytic oxidation tank according to claim 1, characterized in that: Two upper and lower transverse baffles are arranged between two adjacent vertical baffles.

3. The homogeneous ozone catalytic oxidation tank according to claim 2, characterized in that: Assume that two adjacent vertical baffles are vertical baffle A and vertical baffle B; sewage flows in from below the vertical baffle A and flows out from above the vertical baffle B; the horizontal baffle located below is connected to the vertical baffle A; the horizontal baffle located above is connected to the vertical baffle B.

4. The homogeneous ozone catalytic oxidation tank according to claim 1, characterized in that: The transverse baffle has an upward inclination angle of 1 to 2 degrees with the horizontal direction along the water flow direction.

5. A homogeneous ozone catalytic oxidation sewage treatment system, characterized in that: The sewage treatment system comprises the homogeneous ozone catalytic oxidation tank as described in any one of claims 1 to 4.

6. The homogeneous ozone catalytic oxidation sewage treatment system according to claim 5 is characterized in that: It also includes an ozone input pipe, a reflux pressure pump, a jet dissolved gas device and an ozone aeration device; the reflux pressure pump is used to return sewage from the output area to the input area; the jet dissolved gas device is used to mix ozone and the reflux sewage evenly to form a saturated dissolved gas liquid; the ozone aeration device is used to aerate the saturated dissolved gas liquid in the sewage in the pool body; the input port of the reflux pressure pump is located in the pool body below the pipe port of the sewage outlet pipe; the jet dissolved gas device is provided with an air inlet, a liquid inlet and a liquid outlet; the air inlet of the jet dissolved gas device is connected to the ozone input pipe, the liquid inlet of the jet dissolved gas device is connected to the output port of the reflux pressure pump, and the liquid outlet of the jet dissolved gas device is connected to the input port of the ozone aeration device; the output port of the ozone aeration device is located at the vertical and / or horizontal return corner of the sewage.

7. The homogeneous ozone catalytic oxidation sewage treatment system according to claim 5, characterized in that: It also includes an ozone tail gas destruction device, which is used to treat the ozone tail gas, decompose the residual ozone gas and then discharge it into the atmosphere; the input port of the ozone tail gas destruction device is located in the upper cavity of the pool body.

8. The homogeneous ozone catalytic oxidation sewage treatment system according to claim 5, characterized in that: It also includes a pressure balancing valve, which is used to adjust the gas pressure in the upper cavity of the pool body; the input port of the pressure balancing valve is located in the upper cavity of the pool body.

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