Secondary mixing device of catalytic ozonation reactor

Abstract

The utility model discloses a secondary mixing device of a catalytic ozonation reactor, and relates to the technical field of sewage treatment. Comprising an efficient gas dissolving system, an ozone adding pipe, a secondary mixing device and a filter tank, the efficient gas dissolving system is arranged above the filter tank and connected with the secondary mixing device through the ozone adding pipe, the secondary mixing device is arranged at the bottom of the filter tank, and a water distribution system, a supporting layer and a catalyst are sequentially arranged in the filter tank from bottom to top. According to the utility model, the contact efficiency and the reaction rate of ozone and pollutants in water can be improved, the ozone and the water are mixed again after primary mixing so as to ensure that the ozone fully reacts with organic matters and other pollutants in the water, and the use effect is good and the practicability is strong.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a secondary mixing device of an ozone catalytic oxidation reactor. Background Art

[0002] The working principle of the ozone catalytic oxidation reactor in sewage treatment is mainly based on the strong oxidizing properties of ozone and the role of catalysts. First of all, ozone is a strong oxidant that can remove pollutants such as organic matter, color and odor in water through oxidation. When ozone molecules come into contact with organic pollutants, an oxidation reaction occurs, decomposing these organic matter into carbon dioxide, water or other simple inorganic substances. Secondly, the presence of a catalyst can significantly improve the utilization rate and reaction efficiency of ozone. Under the action of the catalyst, the number of highly active hydroxyl radicals (·OH) produced by ozone decomposition increases. These hydroxyl radicals have stronger oxidizing ability and can more effectively degrade organic pollutants. In addition, the catalyst can also promote the direct oxidation reaction between ozone and organic matter, reduce ozone loss, and thus reduce operating costs.

[0003] Ozone is widely used in sewage treatment. When the existing ozone catalytic oxidation reactor is in use, ozone cannot fully react with pollutants in sewage. Therefore, it is necessary to increase the contact area and efficiency between ozone and pollutants in water so that they can fully react.

[0004] In summary, the utility model designs a secondary mixing device for an ozone catalytic oxidation reactor. Utility Model Content

[0005] In response to the deficiencies in the prior art, the purpose of the present utility model is to provide a secondary mixing device for an ozone catalytic oxidation reactor, which can improve the contact efficiency and reaction rate between ozone and pollutants in water. After the initial mixing, the ozone and water are mixed again to ensure that the ozone fully reacts with organic matter and other pollutants in the water, with good use effect and strong practicality.

[0006] In order to achieve the above-mentioned purpose, the utility model is realized through the following technical scheme: a secondary mixing device of an ozone catalytic oxidation reactor, comprising a secondary mixing device arranged at the bottom of a filter tank, a high-efficiency dissolved air system arranged above the filter tank, and the high-efficiency dissolved air system connected to the secondary mixing device through an ozone dosing pipe, the secondary mixing device being arranged at the bottom of the filter tank, and a water distribution system, a supporting layer and a catalyst being arranged in the filter tank from bottom to top.

[0007] Preferably, the secondary mixing device is connected to a water distribution system.

[0008] Preferably, the secondary mixing device comprises a main pipe, a water inlet and a water outlet pipe, wherein the water inlet is provided in the middle of the main pipe, a plurality of water outlet pipes are evenly distributed on the sides of the main pipe, and the ends of the water outlet pipes are water outlets.

[0009] Preferably, the water outlet is a tapered outlet.

[0010] Preferably, the water outlet pipe includes a first pipe section and a second pipe section, the first pipe section is a straight tube, and the second pipe section is a conical necking structure.

[0011] Due to the tapered design of the outlet of the secondary mixing device, the flow rate is accelerated, which not only helps to further mix the ozone and water, but also increases the solubility of ozone in water. The fast-flowing area will produce low pressure, which helps to "suck" more ozone gas into the water, thereby improving the dissolution efficiency of ozone; after passing through the secondary mixing device, the ozone and water are mixed more evenly, which is conducive to full contact between ozone and organic matter in sewage. Uniform mixing also means that the catalyst (if used) can more effectively contact the pollutants in the sewage, accelerate the chemical reaction, and thus degrade the organic matter faster. Due to more uniform mixing, the reaction rate is improved, and ozone can more effectively oxidize and decompose organic pollutants in sewage. This not only improves the treatment efficiency, but also achieves better water purification effects.

[0012] The beneficial effects of the utility model are as follows: the structural design of the utility model is reasonable, the ozone and water mixture coming out of the high-efficiency dissolved air system are efficiently mixed through the secondary mixing device, and due to the tapered design of the outlet of the secondary mixing device, a Venturi effect is formed, which accelerates the flow rate, improves the ozone dissolution efficiency, makes the mixing more uniform, promotes the full contact between the catalyst and the sewage, accelerates the reaction rate, and enhances the degradation effect of organic matter. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments;

[0014] Figure 1 It is a structural diagram of the utility model;

[0015] Figure 2 This is a schematic diagram of a secondary mixing device of the present utility model;

[0016] Figure 3 This is a schematic diagram of the water outlet pipe of the present utility model. DETAILED DESCRIPTION

[0017] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0018] Reference Figure 1-3This specific embodiment adopts the following technical solution: a secondary mixing device of an ozone catalytic oxidation reactor, including a secondary mixing device 3 arranged at the bottom of a filter tank 4, a high-efficiency dissolved air system 1 arranged above the filter tank 4, and the high-efficiency dissolved air system 1 is connected to the secondary mixing device 3 through an ozone dosing pipe 2. The secondary mixing device is arranged at the bottom of the filter tank 4, and a water distribution system 5, a supporting layer 6 and a catalyst 7 are arranged in the filter tank 4 from bottom to top.

[0019] It is worth noting that the secondary mixing device 3 is connected to the water distribution system 5 .

[0020] It is worth noting that the secondary mixing device 3 includes a main pipe 31, a water inlet 32 ​​and a water outlet pipe 33. The water inlet 32 ​​is provided in the middle of the main pipe 31, and multiple water outlet pipes 33 are evenly distributed on the sides of the main pipe 31. The end of the water outlet pipe 33 is a water outlet 34.

[0021] It is worth noting that the water outlet 34 is a tapered outlet.

[0022] In addition, the water outlet pipe 33 includes a first pipe section 331 and a second pipe section 332. The first pipe section 331 is a straight tube, and the second pipe section 332 is a conical necking structure.

[0023] The efficient dissolved air system of this embodiment: First, ozone gas is thoroughly mixed with water through the efficient dissolved air system to produce an ozone-containing gas-water mixture. The efficient dissolved air system ensures that as much ozone gas as possible is dissolved in the water, thereby improving the efficiency of subsequent reactions.

[0024] The gas-water mixture then enters the secondary mixing device of this embodiment. This device is designed with a tapered outlet, which creates a Venturi effect as the fluid passes through it. The Venturi effect is a phenomenon whereby the flow velocity increases and the pressure decreases as the fluid passes through a constricted area.

[0025] The ozone catalytic oxidation reactor of this specific embodiment combines the strong oxidizing properties of ozone with the adsorption and catalytic properties of the catalyst, and utilizes the highly reactive free radical intermediates, especially hydroxyl radicals (OH), generated by ozone molecules on the catalyst surface to oxidize and remove the difficult-to-biodegrade organic matter in the sewage. This process can effectively solve the problem of incomplete degradation of organic matter, reduce chemical oxygen demand (COD), remove ammonia nitrogen, remove color, etc., and is mainly used in sewage treatment plant upgrading, reverse osmosis concentrated water treatment, upgrading and transformation, garbage leachate, coking wastewater, etc. The secondary mixing device improves the utilization rate of ozone and reduces operating costs through efficient mixing. At the same time, it also promotes full contact between the catalyst and sewage, accelerates the reaction rate, and makes the treatment effect more significant.

[0026] Ozone dissolution efficiency is a key factor influencing the effectiveness of ozone advanced oxidation treatment. A secondary mixing device improves ozone dissolution efficiency by improving gas-water mixing conditions, which is crucial for enhancing overall treatment effectiveness. Factors such as water depth, gas-water ratio, and inlet operating pressure all affect ozone dissolution efficiency. The design and operation of the secondary mixing device can optimize these parameters, thereby improving ozone dissolution efficiency and reaction rate.

[0027] The function of the secondary mixing device of the ozone catalytic oxidation reactor is to improve the dissolution efficiency and reaction rate of ozone, thereby enhancing the degradation effect of organic matter.

[0028] In summary, the secondary mixing device in the ozone catalytic oxidation reactor enhances the degradation effect of organic matter and reduces operating costs by improving the dissolution efficiency and reaction rate of ozone. It is an important component to improve the performance of the entire treatment system.

[0029] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A secondary mixing device for an ozone catalytic oxidation reactor, characterized in that: The invention comprises a secondary mixing device (3) arranged at the bottom of a filter tank (4); a high-efficiency dissolved air system (1) arranged above the filter tank (4); the high-efficiency dissolved air system (1) is connected to the secondary mixing device (3) via an ozone dosing pipe (2); the secondary mixing device is arranged at the bottom of the filter tank (4); and a water distribution system (5), a supporting layer (6) and a catalyst (7) are arranged in sequence from bottom to top in the filter tank (4).

2. The secondary mixing device of an ozone catalytic oxidation reactor according to claim 1, characterized in that: The secondary mixing device (3) is connected to the water distribution system (5).

3. The secondary mixing device of an ozone catalytic oxidation reactor according to claim 1, characterized in that: The secondary mixing device (3) comprises a main pipe (31), a water inlet (32) and a water outlet pipe (33). The main pipe (31) is provided with a water inlet (32) in the middle, and a plurality of water outlet pipes (33) are evenly distributed on the sides of the main pipe (31). The ends of the water outlet pipes (33) are water outlets (34).

4. The secondary mixing device of an ozone catalytic oxidation reactor according to claim 3, characterized in that: The water outlet (34) is a gradually contracting outlet.

5. The secondary mixing device of an ozone catalytic oxidation reactor according to claim 3, characterized in that: The water outlet pipe (33) comprises a first pipe section (331) and a second pipe section (332). The first pipe section (331) is in a straight cylindrical shape, and the second pipe section (332) is in a conical necking structure.

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