Catalytic ozonation tower for wastewater treatment

Abstract

The utility model relates to the technical field of wastewater treatment, and provides a catalytic ozonation tower for wastewater treatment, which comprises a catalytic reactor, an air inlet pipe is fixedly mounted on the outer surface of one side, close to the lower end, of the catalytic reactor, and a water inlet pipe is fixedly mounted close to the lower end of the air inlet pipe; oxygen-rich gas exhausted by the tail gas destructor is purified and then recycled for the ozone generator, so that the scale of an oxygen preparation system is reduced, the investment cost and the operation cost are also reduced, the oxygen-rich gas exhausted by the tail gas destructor is purified and recycled, and the oxygen-rich gas exhausted by the tail gas destructor is recycled and reused. Environmental pollution caused by harmful gas such as VOCs in the tail gas is avoided, meanwhile, carbon dioxide in the gas is removed, and carbon emission is reduced; carbon dioxide is treated through sodium peroxide, harmful gas is removed, new oxygen is generated, the oxygen concentration caused by ozone consumption in original mixed gas can be supplemented, and it is guaranteed that the oxygen concentration in recycled gas is larger than 90%.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and in particular to an ozone catalytic oxidation tower for wastewater treatment. Background Technology

[0002] The rapid development of modern industry has resulted in industrial wastewater containing recalcitrant organic compounds. These recalcitrant organic compounds have large molecular weights, high toxicity, and complex structures, making them largely ineffective for degradation by microorganisms. Many can cause cancer, birth defects, and mutations in humans, and their harmful effects can be amplified through bioaccumulation. Chemical oxidation is a widely used method for water pollution control among numerous physicochemical approaches. Commonly used oxidants include oxygen, liquid chlorine, hydrogen peroxide, and ozone. Compared to other commonly used oxidants, ozone has the strongest oxidizing power, showing significant effects in decolorization, deodorization, sterilization, and removal of both organic and inorganic substances. It produces no secondary pollution, and ozone production only requires air and electricity, making operation and management convenient. Therefore, research and application of ozone oxidation equipment in wastewater treatment are gradually increasing.

[0003] However, in existing technologies, ozone catalytic oxidation methods mostly involve pressurizing air with an air compressor before it enters an oxygen generator to produce oxygen with an oxygen content of over 90%. This oxygen then enters an ozone generator to produce ozone of a certain concentration, which then enters an ozone catalytic reactor to mix with wastewater. The mixture undergoes an oxidation reaction with organic matter in the wastewater through a catalyst bed. The resulting gas is drawn out from the top, pyrolyzed by a tail gas destroyer, and then discharged. The effluent from the ozone reactor flows out from the overflow port at the top of the reactor. However, the majority of the treatment cost of this process is due to the electricity consumption of the ozone production system. This electricity consumption mainly comes from the electricity consumption of the oxygen generator and the ozone generator, resulting in significant power consumption and reduced ozone production efficiency. Excess oxygen is discharged through the tail gas destroyer, leading to oxygen waste and hindering the recycling of excess oxygen, thus increasing the treatment cost of this process. Utility Model Content

[0004] The purpose of this invention is to address the problem in the existing technology where the majority of the processing cost is due to the electricity consumption of the ozone generation system. This electricity consumption mainly comes from the electricity consumption of the oxygen generator for producing oxygen and the ozone generator for producing ozone. The high electricity consumption reduces the efficiency of ozone generation, and excess oxygen is discharged through the exhaust gas destroyer, resulting in oxygen waste and making it difficult to recycle excess oxygen, thus increasing the processing cost of the technology.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: an ozone catalytic oxidation tower for wastewater treatment, comprising: a catalytic reactor, wherein an air inlet pipe is fixedly installed on the outer surface of the catalytic reactor near its lower end, and a water inlet pipe is fixedly installed at the lower end of the catalytic reactor near the air inlet pipe, and further comprising:

[0006] A pressure detector is installed at the top of the catalytic reactor. A connecting line is fixedly connected to the top of the pressure detector, and a controller is provided on the outer surface of the connecting line.

[0007] An exhaust pipe is fixedly connected to the top of the catalytic reactor on the side away from the pressure detector. One end of the exhaust pipe is fixedly connected to a tail gas suction fan. The output end of the tail gas suction fan is fixedly connected to a connecting pipe, and a tail gas breaker is fixedly installed on the outer surface of the connecting pipe.

[0008] An ozone catalyst is disposed inside the catalytic reactor;

[0009] A drain pipe is fixedly installed on the side of the catalytic reactor near the top.

[0010] Preferably, the other end of the connecting line is electrically connected to the exhaust gas suction fan and the exhaust gas destroyer, and the other end of the connecting pipe is fixedly installed with a housing, and an activated carbon adsorption column is movably embedded inside the housing.

[0011] The technical effect of adopting the above-mentioned further solution is that the exhaust gas suction fan and exhaust gas destroyer are controlled by the controller to prevent air from entering the interior of the catalytic reactor, and the activated carbon adsorption column can adsorb and remove VOCs in the gas.

[0012] Preferably, a connecting pipe 2 is fixedly installed at the bottom of the first box, and the other end of the connecting pipe 2 is fixedly connected to the second box. A sodium peroxide particle reaction column is movably embedded inside the second box.

[0013] The technical effect of adopting the above-mentioned further scheme is that carbon dioxide in the mixed gas reacts with sodium peroxide to produce sodium carbonate and oxygen; water vapor reacts with sodium peroxide to produce solid sodium hydroxide.

[0014] Preferably, both the first and second boxes have slots on one side, and sealing plates are movably embedded inside the two slots. Handles are fixedly connected to the outer surfaces of the two sealing plates.

[0015] The technical effect of adopting the above-mentioned further solution is that the sealing plate can be removed from the inside of the slot by means of the handle, and the activated carbon adsorption column and sodium peroxide particle reaction column inside the first box and the second box can be replaced regularly.

[0016] Preferably, limit holes are provided on both sides of the two sealing plates, and mounting holes are provided on both sides of the first and second housings, with fixing bolts threaded into the interior of each of the mounting holes.

[0017] The technical effect of adopting the above-mentioned further solution is that the fixing bolts can be installed inside the limiting hole through the mounting hole thread to limit and fix the sealing plate, thereby improving the sealing performance of the sealing plate.

[0018] Preferably, a U-shaped tube is fixedly connected inside the second housing, a pressure tank is provided on the outer surface of the U-shaped tube, a pressure release device is provided on the outer surface of the U-shaped tube near the pressure tank, and a one-way valve is provided at the end of the U-shaped tube away from the second housing.

[0019] The technical effect of adopting the above-mentioned further solution is that the treated gas enters the interior of the pressurization tank through the U-shaped tube, and is then transported to the inlet of the ozone generator for recycling through the pressure release device. The one-way valve prevents the treated gas from flowing back.

[0020] Preferably, one end of the air intake pipe is fixedly connected to a Z-shaped pipe, one end of the Z-shaped pipe is fixedly connected to a connecting pipe three, and an ozone generator is provided on the outer surface of the connecting pipe three.

[0021] The technical advantage of adopting the above-mentioned further solution is that the Z-shaped tube can deliver ozone into the interior of the catalytic reactor.

[0022] Preferably, an oxygen generator is installed on the side of the connecting pipe three near the ozone generator, and an air compressor is installed on the side of the connecting pipe three away from the ozone generator. One end of the U-shaped pipe is fixedly connected to the side of the connecting pipe three near the ozone generator.

[0023] The technical effect of adopting the above-mentioned further solution is that air is delivered to the interior of the oxygen generator through an air compressor to produce oxygen, and the oxygen is delivered to the interior of the ozone generator through connecting pipe three.

[0024] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0025] 1. In this utility model, the exhaust gas blaster discharges oxygen-rich gas, which is then purified and recycled for use in an ozone generator, thereby reducing the scale of the oxygen production system and lowering investment and operating costs.

[0026] 2. In this utility model, the exhaust gas destroyer discharges oxygen-rich gas, which is then purified and recycled, avoiding the pollution of the environment by harmful gases such as VOCs in the exhaust gas. At the same time, the removal of carbon dioxide from the gas also reduces carbon emissions. By treating carbon dioxide with sodium peroxide, not only are harmful gases removed, but new oxygen is also generated, which can replenish the oxygen concentration in the original gas mixture caused by ozone consumption, ensuring that the oxygen concentration in the recycled gas is greater than 90%. Attached Figure Description

[0027] Figure 1This utility model provides a structural schematic diagram of an ozone catalytic oxidation tower for wastewater treatment;

[0028] Figure 2 This utility model provides a side view structural diagram of an ozone catalytic oxidation tower for wastewater treatment;

[0029] Figure 3 This invention provides a schematic diagram of a partial explosion structure of an ozone catalytic oxidation tower for wastewater treatment.

[0030] Figure 4 This invention proposes an ozone catalytic oxidation tower for wastewater treatment. Figure 3 Enlarged structural diagram at point A in the middle.

[0031] Legend:

[0032] 1. Catalytic reactor; 101. Ozone catalyst; 102. Drain pipe; 103. Water inlet pipe; 104. Air inlet pipe; 105. Z-shaped pipe; 106. Ozone generator; 107. Oxygen generator; 108. Air compressor; 109. Connecting pipe three; 110. U-shaped pipe; 111. One-way valve; 112. Pressure relief device; 113. Pressurization tank; 114. Box two; 115. Box one; 116. 117. Connecting pipe 2; 118. Exhaust gas breaker; 119. Exhaust gas suction fan; 120. Exhaust pipe; 121. Connecting wire; 122. Controller; 123. Pressure detector; 124. Slot; 125. Sealing plate; 126. Handle; 127. Activated carbon adsorption column; 128. Sodium peroxide particle reaction column; 129. Limiting hole; 130. Mounting hole; 131. Fixing bolt. Detailed Implementation

[0033] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0034] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0035] Example 1, such as Figure 1-4As shown, this utility model provides an ozone catalytic oxidation tower for wastewater treatment, comprising: a catalytic reactor 1, an air inlet pipe 104 fixedly installed on the outer surface of the catalytic reactor 1 near its lower end, and a water inlet pipe 103 fixedly installed at the lower end of the catalytic reactor 1 near the air inlet pipe 104; and a pressure detector 123 disposed on the top of the catalytic reactor 1, with a connecting wire 121 fixedly connected to the top of the pressure detector 123, and a controller 122 disposed on the outer surface of the connecting wire 121; and an exhaust pipe. 120, fixedly connected to the top of the catalytic reactor 1 on the side away from the pressure detector 123, has an exhaust pipe 120 fixedly connected to a tail gas suction fan 119 at one end, and a connecting pipe 117 fixedly connected to the output end of the tail gas suction fan 119. A tail gas breaker 118 is fixedly installed on the outer surface of the connecting pipe 117. The other end of the connecting line 121 is electrically connected to the tail gas suction fan 119 and the tail gas breaker 118. A housing 115 is fixedly installed at the other end of the connecting pipe 117. The housing 115... An activated carbon adsorption column 127 is embedded internally; a connecting pipe 116 is fixedly installed and connected to the bottom of box 115, and box 2 114 is fixedly connected to the other end of the connecting pipe 116; a sodium peroxide particle reaction column 128 is embedded internally in box 2 114; a slot 124 is opened on one side of both box 115 and box 2 114, and a sealing plate 125 is movably embedded inside each of the two slots 124; a handle 126 is fixedly connected to the outer surface of each of the two sealing plates 125; the two sealing plates 125... Limiting holes 129 are provided on both sides of plate 125. Mounting holes 130 are provided on both sides of housing 115 and housing 2 114. Fixing bolts 131 are threaded into the interior of each mounting hole 130. A U-shaped tube 110 is fixedly connected inside housing 2 114. A pressure tank 113 is provided on the outer surface of the U-shaped tube 110. A pressure release device 112 is provided on the outer surface of the U-shaped tube 110 near the pressure tank 113. A one-way valve 111 is provided at the end of the U-shaped tube 110 away from housing 2 114.

[0036] In this embodiment, air is delivered to the oxygen generator 107 via air compressor 108 to generate oxygen. The oxygen is then delivered to the ozone generator 106 via connecting pipe 109 and input into the catalytic reactor 1 via Z-shaped pipe 105. Wastewater enters the catalytic reactor 1 via inlet pipe 103 to react with the ozone catalyst 101, treating the wastewater. The treated wastewater is discharged via drain pipe 102. Pressure detector 123 is electrically connected to exhaust gas fan 119 and exhaust gas destroyer 118 via connecting cable 121 and is controlled by controller 122 to prevent air from entering the catalytic reactor 1. The exhaust gas destroyer 118 delivers the discharged gas to the housing 115 via connecting pipe 117. Activated carbon adsorption column 127 is movably embedded inside the housing 115, which can adsorb and remove VOCs from the gas.

[0037] Example 2, as Figure 1-4 As shown, an ozone catalyst 101 is disposed inside the catalytic reactor 1; a drain pipe 102 is fixedly installed on one side of the catalytic reactor 1 near the upper end, and one end of the air inlet pipe 104 is fixedly connected to a Z-shaped pipe 105. One end of the Z-shaped pipe 105 is fixedly connected to a connecting pipe 109. An ozone generator 106 is disposed on the outer surface of the connecting pipe 109; an oxygen generator 107 is disposed on the side of the connecting pipe 109 near the ozone generator 106, and an air compressor 108 is disposed on the side of the connecting pipe 109 away from the ozone generator 106. One end of a U-shaped pipe 110 is fixedly connected to the side of the connecting pipe 109 near the ozone generator 106.

[0038] In this embodiment, the gas enters the interior of housing 114 via connecting pipe 116. A sodium peroxide particle reaction column 128 is movably embedded inside housing 114. Carbon dioxide in the mixed gas reacts with sodium peroxide to produce sodium carbonate and oxygen; water vapor reacts with sodium peroxide to produce solid sodium hydroxide. The exhaust gas destroyer 118 discharges oxygen-rich gas, which is then purified and reused in the ozone generator 106. This reduces the size of the air compressor 108 and oxygen generator 107, thereby reducing investment and operating costs. The sealing plate 125 can be removed via handle 126, allowing the activated carbon adsorption column 127 inside housing 115 and housing 114 to react with the sodium peroxide. The sodium particle reaction column 128 is replaced periodically. The treated gas enters the interior of the pressurization tank 113 through the U-shaped tube 110 and is then transported to the inlet of the ozone generator 106 for recycling via the pressure release device 112. A one-way valve 111 is installed at one end of the U-shaped tube 110 to prevent the treated gas from flowing back. The discharged gas is purified and recycled, which can avoid the pollution of the environment by harmful gases such as VOCs in the exhaust gas and reduce carbon emissions. Sodium peroxide treats carbon dioxide, which not only removes harmful gases but also generates new oxygen, which can replenish the oxygen concentration in the original mixed gas caused by ozone consumption and ensure that the oxygen concentration in the recycled gas is greater than 90%.

[0039] Working principle: During use, air is delivered to the oxygen generator 107 via air compressor 108 to generate oxygen. Oxygen is then delivered to the ozone generator 106 via connecting pipe 109 and input into the catalytic reactor 1 via Z-shaped pipe 105. Wastewater enters the catalytic reactor 1 via inlet pipe 103 to react with the ozone catalyst 101, treating the wastewater. The treated wastewater is discharged through drain pipe 102. Pressure detector 123 is electrically connected to exhaust gas fan 119 and exhaust gas destructor 118 via connecting cable 121. The controller 122 controls the gas to prevent air from entering the catalytic reactor 1. The exhaust gas destroyer 118 transports the discharged gas to the interior of the housing 115 through the connecting pipe 117. The interior of the housing 115 is equipped with an activated carbon adsorption column 127, which can adsorb and remove VOCs in the gas. Then, the gas enters the interior of the housing 114 through the connecting pipe 116. The interior of the housing 114 is equipped with a sodium peroxide particle reaction column 128, where carbon dioxide in the mixed gas reacts with sodium peroxide to generate... Sodium carbonate and oxygen; water vapor reacts with sodium peroxide to produce solid sodium hydroxide. The exhaust gas destroyer 118 discharges oxygen-rich gas, which is then purified and reused in the ozone generator 106. This reduces the size of the air compressor 108 and oxygen generator 107, thereby reducing investment and operating costs. The sealing plate 125 can be removed via handle 126, allowing for periodic replacement of the activated carbon adsorption column 127 and the sodium peroxide particle reaction column 128 inside the first chamber 115 and the second chamber 114. The treated gas enters the booster tank 11 through the U-shaped pipe 110. Inside 3, the gas is circulated to the inlet of the ozone generator 106 via the pressure release device 112. One end of the U-shaped tube 110 is equipped with a one-way valve 111 to prevent the treated gas from flowing back. The discharged gas is purified and recycled, which can avoid the pollution of the environment by harmful gases such as VOCs in the exhaust gas and reduce carbon emissions. Sodium peroxide treats carbon dioxide, which not only removes harmful gases but also generates new oxygen, which can replenish the oxygen concentration in the original mixed gas caused by ozone consumption and ensure that the oxygen concentration in the recycled gas is greater than 90%.

[0040] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. An ozone catalytic oxidation tower for wastewater treatment, comprising: A catalytic reactor (1), wherein an air inlet pipe (104) is fixedly installed on the outer surface of the catalytic reactor (1) near its lower end, and a water inlet pipe (103) is fixedly installed at the lower end of the catalytic reactor (1) near the air inlet pipe (104), characterized in that it further comprises: A pressure detector (123) is installed on the top of the catalytic reactor (1). A connecting line (121) is fixedly connected to the top of the pressure detector (123). A controller (122) is installed on the outer surface of the connecting line (121). An exhaust pipe (120) is fixedly connected to the top of the catalytic reactor (1) on the side away from the pressure detector (123). One end of the exhaust pipe (120) is fixedly connected to a tail gas suction fan (119). The output end of the tail gas suction fan (119) is fixedly connected to a connecting pipe (117). A tail gas destroyer (118) is fixedly installed on the outer surface of the connecting pipe (117). An ozone catalyst (101) is disposed inside the catalytic reactor (1); A drain pipe (102) is fixedly installed on the side of the catalytic reactor (1) near the upper end.

2. The ozone catalytic oxidation tower for wastewater treatment according to claim 1, characterized in that: The other end of the connecting line (121) is electrically connected to the exhaust gas suction fan (119) and the exhaust gas destroyer (118). The other end of the connecting pipe (117) is fixedly installed with a housing (115). An activated carbon adsorption column (127) is movably embedded inside the housing (115).

3. The ozone catalytic oxidation tower for wastewater treatment according to claim 2, characterized in that: The bottom of the first box (115) is fixedly connected to the second connecting pipe (116), and the other end of the second connecting pipe (116) is fixedly connected to the second box (114). The second box (114) is movably embedded with a sodium peroxide particle reaction column (128).

4. An ozone catalytic oxidation tower for wastewater treatment according to claim 2, characterized in that: Both the first box (115) and the second box (114) have slots (124) on one side, and sealing plates (125) are movably embedded inside the two slots (124). Handles (126) are fixedly connected to the outer surfaces of the two sealing plates (125).

5. An ozone catalytic oxidation tower for wastewater treatment according to claim 4, characterized in that: Limiting holes (129) are provided on both sides of the two sealing plates (125), and mounting holes (130) are provided on both sides of the first box (115) and the second box (114). Fixing bolts (131) are threaded into the interior of the multiple mounting holes (130).

6. An ozone catalytic oxidation tower for wastewater treatment according to claim 3, characterized in that: A U-shaped tube (110) is fixedly connected inside the second box (114). A pressure tank (113) is provided on the outer surface of the U-shaped tube (110). A pressure release device (112) is provided on the outer surface of the U-shaped tube (110) near the pressure tank (113). A one-way valve (111) is provided at the end of the U-shaped tube (110) away from the second box (114).

7. An ozone catalytic oxidation tower for wastewater treatment according to claim 1, characterized in that: One end of the air intake pipe (104) is fixedly connected to a Z-shaped pipe (105), and one end of the Z-shaped pipe (105) is fixedly connected to a connecting pipe three (109). An ozone generator (106) is provided on the outer surface of the connecting pipe three (109).

8. An ozone catalytic oxidation tower for wastewater treatment according to claim 6, characterized in that: An oxygen generator (107) is installed on the side of the connecting pipe three (109) near the ozone generator (106), and an air compressor (108) is installed on the side of the connecting pipe three (109) away from the ozone generator (106). One end of the U-shaped pipe (110) is fixedly connected to the side of the connecting pipe three (109) near the ozone generator (106).

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