A sewage treatment system using an integrated ozone generating device

Abstract

The utility model relates to a sewage treatment system adopting integrated ozone generating equipment, wherein the integrated ozone generating equipment comprises a box body, the box body is internally provided with air compressors, first filters, first gas storage tanks, gas-water separators, second filters, cold dryers, third filters, second gas storage tanks, oxygen generators, third gas storage tanks, fourth filters, pressure reducing valves and ozone generators connected in sequence, the box body is further internally provided with heat exchangers, ozone distribution units and ozone tail gas treatment units, the ozone generators are connected with the ozone distribution units, the output side of the ozone distribution units is provided with a plurality of ozone gas supply pipes connected with corresponding ozone contact tanks in the ozone contact tank group respectively, and each ozone contact tank is connected with the ozone tail gas treatment unit through an ozone tail gas recovery pipe. The utility model can meet the treatment needs of large water quantity sewage, the integrated ozone generating equipment has compact structure, land is saved, and the overall transfer of the integrated ozone generating equipment is also facilitated.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment, specifically a wastewater treatment system using an integrated ozone generator. Background Technology

[0002] After traditional biochemical treatment, most of the organic matter in sewage from municipal, industrial, and domestic wastewater is removed. However, the remaining residual pollutants are difficult to treat and must undergo multi-stage deep treatment to achieve effective removal. Ozone reactors can oxidize most organic matter in water. They have a fast reaction and strong oxidation capacity and are increasingly being used by sewage treatment plants to treat residual pollutants in sewage.

[0003] Ozone reactors are typically used in conjunction with ozone generators, which usually require additional equipment such as cooling systems. However, in current technologies, the equipment for ozone generators used in municipal, industrial, and domestic wastewater treatment is often dispersed and occupies a large area. Since many wastewater treatment plant projects have limited land, the layout design of their wastewater treatment systems is severely restricted. Furthermore, with the increasing volume of urban wastewater treatment, there are requirements that the ozone concentration and purity generated by the ozone generator must meet the wastewater treatment needs, and higher processing capacities are also being demanded from the ozone reactors.

[0004] Patent CN202272791U discloses a coating wastewater recycling system using ozone oxidation technology, which includes an ozone reaction tank, an ozone generator, a filter, an equalization tank, and other structures. This system is mainly used for coating wastewater treatment in places such as paint booths, but its wastewater treatment capacity is limited and it cannot be applied to large-volume sewage treatment in municipal, industrial, and domestic fields.

[0005] Patent CN217350883U discloses a concentrated water catalytic oxidation device, which includes an ozone generator, an ozone plate heat exchanger, a catalytic oxidation tower, and other structures. The ozone plate heat exchanger is used to cool and exchange heat for the ozone generator. When the device is working, the concentrated water is degraded under the dual action of the catalyst and ozone. However, the device only sets a simple Y-type filter on the air inlet pipe of the ozone generator to remove impurities and ensure the purity of the oxygen used to produce ozone.

[0006] Patent CN209940470U discloses an ozone generator connected to an ozone oxidation contact reaction tank. The top of the tank is fixed with an arc-shaped electrode plate, and the bottom of the tank is provided with a water inlet pipe. One end of the water inlet pipe is connected to a second water inlet pipe of the ozone oxidation contact reaction tank, and the other end extends into the tank and is connected to a spray head. The purpose of this device is to make reasonable use of pool water to cool the ozone generator. At the same time, the cooling water can also be recycled by the swimming pool. The spray head cools down by spraying, which increases the contact area, improves the cooling effect, and increases the ozone yield. Utility Model Content

[0007] The purpose of this utility model is to provide a sewage treatment system using an integrated ozone generator, which can meet the treatment needs of large volumes of sewage. The integrated ozone generator has a compact structure, saves land, and is also convenient for overall relocation.

[0008] The objective of this utility model is achieved through the following technical solution:

[0009] A wastewater treatment system employing an integrated ozone generator includes an integrated ozone generator and an ozone contact tank assembly. The integrated ozone generator includes a housing, and inside the housing are arranged in series the following components: an air compressor, a first filter, a first air storage tank, an air-water separator, a second filter, a refrigerated dryer, a third filter, a second air storage tank, an oxygen generator, a third air storage tank, a fourth filter, a pressure reducing valve, and an ozone generator. Additionally, the housing also includes a heat exchanger, an ozone distribution unit, and an ozone exhaust gas treatment unit. The heat exchanger is connected to the ozone generator via an internal circulation pipeline. The ozone output end of the ozone generator is connected to the ozone distribution unit via an ozone output pipe. The output side of the ozone distribution unit has multiple ozone filling pipes, each connected to a corresponding ozone contact tank in the ozone contact tank assembly. Each ozone contact tank is connected to the ozone exhaust gas treatment unit via an ozone exhaust gas recovery pipe. The ozone contact tank assembly has an inlet pipe assembly on one side and an outlet pipe assembly on the other side.

[0010] The air compressor, first air tank, refrigerated dryer, second air tank, and ozone exhaust gas treatment unit are sequentially arranged on one side of the box. The ozone generator, third air tank, oxygen generator, heat exchanger, and ozone distribution unit are sequentially arranged on the other side of the box. An air intake fan is provided on the side wall of the box corresponding to the outer side of the air compressor, and an exhaust fan is provided on the side wall of the box corresponding to the outer side of the ozone generator. In addition, an ozone leak detector and an oxygen leak detector are provided inside the box.

[0011] The internal circulation pipeline assembly between the ozone generator and the heat exchanger includes an internal circulation outlet pipe and an internal circulation return pipe. One end of the internal circulation outlet pipe is connected to the outlet port on the ozone generator, and the other end is connected to the circulation inlet port on the heat exchanger. One end of the internal circulation return pipe is connected to the circulation outlet port on the heat exchanger, and the other end is connected to the inlet port on the ozone generator. The hot water inlet port on the heat exchanger is connected to the external circulation inlet pipe, and the hot water outlet port on the heat exchanger is connected to the external circulation return pipe.

[0012] The internal circulation return water pipe is equipped with a flow control element and a temperature control element.

[0013] The box body has an opening door on the air inlet / outlet side that can be opened to allow the ozone filling pipe and ozone exhaust gas recovery pipe to enter. The ends of the external circulation water inlet pipe and the external circulation water return pipe are both located outside the box body and are equipped with quick-connect fittings.

[0014] The ozone exhaust gas treatment unit is provided with an exhaust pipe on one side. The ozone distribution unit is provided with multiple gas pumps. The ozone output pipe is provided with multiple output branches at its end. Each output branch is connected to the input end of the corresponding gas pump. The output end of each gas pump is connected to the corresponding ozone gas supply pipe.

[0015] The water inlet pipe assembly includes a main water inlet pipe and a distribution pipe. The main water inlet pipe is connected to the distribution pipe, and the distribution pipe is provided with multiple water inlet branch pipes. Each water inlet branch pipe is connected to the upper end of the corresponding ozone contact tank. The water outlet pipe assembly includes a main water outlet pipe, and the main water outlet pipe is provided with multiple water outlet branch pipes. Each water outlet branch pipe is connected to the lower end of the corresponding ozone contact tank. In addition, the distribution pipe is provided with a bypass pipe connected to the main water outlet pipe. Each water inlet branch pipe, bypass pipe, and water outlet branch pipe is provided with a control valve to control the on / off state of the pipeline.

[0016] The ozone contact tank is equipped with an ozone aeration pipe network at the bottom, and the ozone filling pipe is connected to the ozone aeration pipe network at the bottom of the corresponding ozone contact tank. The ozone aeration pipe network is equipped with an ozone aeration head, and the ozone contact tank is equipped with an ozone exhaust gas output pipe at the top, which is connected to the ozone exhaust gas recovery pipe.

[0017] The ozone contact tank assembly includes a backwash water system, which includes a backwash inlet main pipe and a backwash outlet main pipe. The backwash inlet main pipe has multiple backwash inlet branch pipes at its end, and each backwash inlet branch pipe is connected to the lower end of the corresponding ozone contact tank. The backwash outlet main pipe has multiple backwash outlet branch pipes at its end, and each backwash outlet branch pipe is connected to the upper end of the corresponding ozone contact tank. Both the backwash inlet branch pipe and the backwash outlet branch pipe are equipped with control valves to control the on / off state of the pipeline.

[0018] The ozone contact tank assembly includes a backwash air system, which includes a backwash air intake main pipe and multiple backwash air intake branch pipes at the end of the backwash air intake main pipe. The backwash air intake branch pipes extend into the bottom of the corresponding ozone contact tank. Multiple backwash cloth air perforated pipes are arranged at the bottom of the ozone contact tank, and the middle of each backwash cloth air perforated pipe is connected to the backwash air intake branch pipe. A breather valve is provided at the upper end of the ozone contact tank.

[0019] The advantages and positive effects of this utility model are as follows:

[0020] 1. The integrated ozone generator of this utility model can ensure the oxygen concentration, purity (impurities are greatly reduced) and dew point temperature entering the ozone generator, thereby ensuring that the ozone concentration and purity generated by the ozone generator can meet the needs of large-volume sewage treatment. At the same time, multiple ozone contact tanks can be set in the ozone contact tank group to participate in sewage treatment, which improves the sewage treatment capacity and thus can meet the needs of large-volume sewage treatment.

[0021] 2. This utility model can open an appropriate number of inlet branch pipes according to the actual water volume, thereby putting the corresponding number of ozone contact tanks into sewage treatment. This utility model can also close all inlet branch pipes, in which case the ozone contact tank group will not participate in treatment. This ensures the sewage treatment volume while improving the flexibility of equipment use.

[0022] 3. The integrated ozone generator of this utility model is integrated into a box and does not affect the on-site connection. The box has a door on the gas inlet and outlet side. After opening the door, the ozone filling pipe and the ozone exhaust gas recovery pipe can be directly connected to the ozone distribution unit and the exhaust gas treatment unit, respectively. When the integrated ozone generator needs to be moved, the operators will separate the relevant pipes and then close the door. At this time, the box can be hoisted and moved as a whole.

[0023] 4. The integrated ozone generator of this utility model can be integrated into a single housing, which has a compact structure and saves space.

[0024] 5. The ozone contact tank group of this utility model is equipped with two backwashing systems: a backwash water system and a backwash air system, to meet the backwashing needs of the ozone contact tank. When one ozone contact tank is being backwashed, the other ozone contact tanks can still remain online and will not affect the sewage treatment operation. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of this utility model.

[0026] Figure 2 for Figure 1 A schematic diagram of the integrated ozone generator.

[0027] Figure 3 for Figure 2 A schematic diagram showing the connection relationships between the various parts of an integrated ozone generator.

[0028] Figure 4 for Figure 1 Schematic diagram of the inlet and outlet pipe groups in the ozone reaction system.

[0029] Figure 5 for Figure 1 A schematic diagram of the ozone filling pipe and ozone tail gas recovery pipe in an ozone reaction system.

[0030] Figure 6 for Figure 1 Schematic diagram of the backwash inlet main pipe in the ozone reaction system.

[0031] Figure 7 for Figure 1 AA view in

[0032] Figure 8 for Figure 7 Enlarged view of point I in the image.

[0033] Figure 9 for Figure 8 A top view of the ozone aerator layout.

[0034] Figure 10 for Figure 8 Top view of the layout of the backwash cloth perforated pipe located at the bottom of the ozone contact tank.

[0035] Among them, 1 is an integrated ozone generator, 101 is an air compressor, 102 is the first filter, 103 is the first air storage tank, 104 is an air-water separator, 105 is the second filter, 106 is a refrigerated dryer, 107 is the third filter, 108 is the second air storage tank, 109 is an oxygen generator, 110 is the third air storage tank, 111 is the fourth filter, 112 is a pressure reducing valve, 113 is an ozone generator, 1131 is an ozone output pipe, 1132 is an internal circulation water outlet pipe, 1133 is an internal circulation water return pipe, 1134 is a temperature control element, 1135 is a flow control element, 1136 is a heat exchanger, 1137 is an external circulation water inlet pipe, 1138 is an external circulation water return pipe, 114 is an ozone distribution unit, 1141 is an air pump, 115 is an exhaust gas treatment unit, and 1151 is an exhaust gas pipe. 116 is the enclosure, 1161 is the intake fan, 1162 is the exhaust fan, 2 is the ozone filling pipe, 3 is the backwash water main pipe, 301 is the backwash water branch pipe, 4 is the backwash air intake main pipe, 401 is the backwash air intake branch pipe, 5 is the water inlet pipe assembly, 501 is the water inlet main pipe, 502 is the distribution pipe, 503 is the water inlet branch pipe, 504 is the bypass pipe, 6 is the ozone contact tank, 601 is the breather valve, 602 is... The ozone exhaust gas output pipe is as follows: 603 is the activated carbon packing layer, 604 is the supporting packing layer, 605 is the porous filter plate, 606 is the ozone aeration head, 6061 is the ozone aeration pipe network, 607 is the maintenance port, 608 is the backwash air distribution perforated pipe, 7 is the backwash water inlet main pipe, 701 is the backwash water inlet branch pipe, 8 is the water outlet pipe group, 801 is the water outlet branch pipe, 802 is the water outlet main pipe, and 9 is the ozone exhaust gas recovery pipe. Detailed Implementation

[0036] The present invention will now be described in further detail with reference to the accompanying drawings.

[0037] like Figures 1-10 As shown, this utility model includes an integrated ozone generator 1 and an ozone contact tank assembly, wherein, as Figures 2-3As shown, the integrated ozone generator 1 includes a housing 116, and the housing 116 contains, in series, an air compressor 101, a first filter 102, a first air storage tank 103, an air-water separator 104, a second filter 105, a refrigerated dryer 106, a third filter 107, a second air storage tank 108, an oxygen generator 109, a third air storage tank 110, a fourth filter 111, a pressure reducing valve 112, and an ozone generator 113. Additionally, the housing 116 also contains a heat exchanger 1136, an ozone distribution unit 114, and an ozone exhaust gas treatment unit. The ozone generator 113 is connected to the ozone generator 113 via an internal circulation pipeline group. The ozone output end of the ozone generator 113 is connected to the ozone distribution unit 114 via an ozone output pipe 1131. The output side of the ozone distribution unit 114 is provided with multiple ozone filling pipes 2, and each ozone filling pipe 2 is connected to the corresponding ozone contact tank 6 in the ozone contact tank group. Each ozone contact tank 6 is connected to the ozone tail gas treatment unit 115 via an ozone tail gas recovery pipe 9. The ozone contact tank group is provided with an inlet pipe group 5 on one side and an outlet pipe group 8 on the other side.

[0038] When the ozone generator 113 is working, the oxygen in the ozone generator 113 is converted into ozone under the action of medium-frequency high-voltage discharge. After temperature, pressure, and flow rate monitoring and adjustment, the ozone is produced from the ozone outlet on the ozone generator 113. An ozone concentration detector can be equipped on the ozone outlet for online monitoring of the ozone concentration emitted by the ozone generator. The ozone generator 113 is a technology known in the art, such as the ozone generator in patent CN209940470U or other suitable commercially available products.

[0039] The air compressor 101, refrigerated dryer 106, oxygen generator 109, and each filter are all technologies known in the art and are commercially available products.

[0040] like Figures 1-2As shown, in this embodiment, the air compressor 101, the first air storage tank 103, the refrigerated dryer 106, the second air storage tank 108, and the ozone exhaust gas treatment unit 115 are sequentially arranged on one side of the interior of the housing 116. The ozone generator 113, the third air storage tank 110, the oxygen generator 109, the heat exchanger 1136, and the ozone distribution unit 114 are sequentially arranged on the other side of the interior of the housing 116. An intake fan 1161 is provided on the side wall of the housing 116 corresponding to the outer side of the air compressor 101, and an exhaust fan 1162 is provided on the side wall of the housing 116 corresponding to the outer side of the ozone generator 113. In addition, an ozone leak detector and an oxygen leak detector are provided at appropriate positions inside the housing 116 to detect whether there is ozone or oxygen leakage in real time, and can send a signal to the equipment system to control the exhaust fan 1162 to start real-time exhaust. The ozone leak detector and the oxygen leak detector are both technologies known in the art and are commercially available products. Through the above design, this utility model enables all devices to be integrated into a rectangular box 116, and the box 116 has a container structure, which can be hoisted and transferred as a whole.

[0041] like Figures 1-2 As shown, in this embodiment, the internal circulation pipeline group between the ozone generator 113 and the heat exchanger 1136 includes an internal circulation outlet pipe 1132 and an internal circulation return pipe 1133. One end of the internal circulation outlet pipe 1132 is connected to the outlet port of the ozone generator 113, and the other end is connected to the circulation inlet port of the heat exchanger 1136. One end of the internal circulation return pipe 1133 is connected to the circulation outlet port of the heat exchanger 1136, and the other end is connected to the inlet port of the ozone generator 113. The hot water inlet port of the heat exchanger 1136 is connected to a pump room located outside the housing 116 via an external circulation inlet pipe 1137. The hot water outlet port of the heat exchanger 1136 is connected to a return water pool located outside the housing 116 via an external circulation return pipe 1138. In this embodiment, the heat exchanger 1136 is a plate heat exchanger.

[0042] like Figures 1-2 As shown in this embodiment, the internal circulation return water pipe 1133 is provided with a flow control element 1135 and a temperature control element 1134 in sequence along the water flow direction. When the cooling water flow is insufficient or the temperature exceeds the set value, the above-mentioned elements send a signal to the equipment control system to achieve adjustment. The flow control element 1135 and the temperature control element 1134 are commercially available products, such as flow meters, temperature sensors and other components.

[0043] like Figures 1-2As shown, in this embodiment, the ozone exhaust gas treatment unit 115 is provided with an exhaust pipe 1151 on one side for discharging the treated exhaust gas. The exhaust gas treatment unit 115 is a technology known in the art, such as the treatment device in patent CN202590590U or other suitable commercially available products. In addition, in this embodiment, the ozone concentration of the decomposed gas is less than 0.08 ppm, and it can be directly emitted into the atmosphere.

[0044] like Figure 3 As shown, in this embodiment, the ozone distribution unit 114 is provided with multiple gas pumps 1141, the ozone output pipe 1131 is provided with multiple output branches at its end, and each output branch is connected to the input end of the corresponding gas pump 1141. The output end of each gas pump 1141 is connected to the corresponding ozone gas filling pipe 2. The gas pump 1141 is used to control the ozone gas filling amount of each ozone contact tank 6.

[0045] like Figure 2 As shown in this embodiment, the inlet and outlet side of the housing 116 is provided with a door. After opening the door, the ozone filling pipe 2 and the ozone exhaust gas recovery pipe 9 can be directly connected to the ozone distribution unit 114 and the exhaust gas treatment unit 115, respectively. The ends of the external circulation water inlet pipe 1137 and the external circulation water return pipe 1138 are both located outside the housing 116 and are provided with quick-connect fittings to connect to the corresponding pipelines. The quick-connect fittings are commercially available products. When the integrated ozone generator 1 needs to be moved, the ozone filling pipe 2 is separated from the ozone distribution unit 114, the ozone exhaust gas recovery pipe 9 is separated from the exhaust gas treatment unit 115, and the ends of the external circulation water inlet pipe 1137 and the external circulation water return pipe 1138 are separated from the corresponding pipelines. Then the door is closed, and the housing 116 can be moved as a whole.

[0046] like Figure 1 , Figure 4 and Figure 7As shown, during operation, wastewater flows from top to bottom within the ozone contact tank 6. The inlet pipe assembly 5 includes a main inlet pipe 501 and a distribution pipe 502. The main inlet pipe 501 is connected to the distribution pipe 502. The distribution pipe 502 is equipped with multiple inlet branch pipes 503, and each inlet branch pipe 503 is connected to the upper end of the corresponding ozone contact tank 6. The outlet pipe assembly 8 includes a main outlet pipe 802, and the main outlet pipe 802 is equipped with multiple outlet branch pipes 801, each outlet branch pipe 801 being connected to the lower end of the corresponding ozone contact tank 6. In addition, the distribution pipe 502 is equipped with a bypass pipe 504 connected to the main outlet pipe 802. Furthermore, the inlet branch pipes 503, bypass pipes 504, and outlet branch pipes 801 are all equipped with control valves to control the on / off state of the pipelines. The wastewater to be treated is input through the main inlet pipe 501 and enters the corresponding ozone contact tank 6 through each inlet branch pipe 503. After discharge, it is discharged through the outlet pipe group 8. This utility model can open an appropriate number of inlet branch pipes 503 according to the actual water volume, thereby putting the corresponding number of ozone contact tanks 6 into wastewater treatment operation. This utility model can also close each inlet branch pipe 503, in which case the water enters directly into the outlet main pipe 802 through the bypass pipe 504, and the ozone contact tank group does not participate in the treatment. This ensures the wastewater treatment capacity while improving the flexibility of equipment use.

[0047] like Figure 5 and Figures 7-9 As shown, when this utility model is working, ozone flows from bottom to top in the ozone contact tank 6. The bottom of the ozone contact tank 6 is provided with an ozone aeration pipe network 6061, and the ozone filling pipe 2 is connected to the ozone aeration pipe network 6061 at the bottom of the ozone contact tank 6. The ozone aeration pipe network 6061 is provided with an ozone aeration head 606, and the top of the ozone contact tank 6 is provided with an ozone tail gas output pipe 602 connected to the ozone tail gas recovery pipe 9.

[0048] like Figure 7 As shown, in this embodiment, the ozone contact tank 6 is internally provided with an activated carbon packing layer 603, a supporting packing layer 604, and a porous filter plate 605 arranged sequentially from top to bottom. The activated carbon packing layer 603 and the supporting packing layer 604 are supported by the porous filter plate 605. Recalcitrant organic matter in wastewater undergoes an oxidation reaction and is degraded under the catalytic action of ozone and activated carbon packing, which is a well-known technology in the art. Additionally, an inspection port 607 is provided at a suitable location on the ozone contact tank 6.

[0049] like Figure 1 and Figures 6-10 As shown, in this embodiment, the ozone contact tank group further includes two backwashing systems: a backwash water system and a backwash air system. The backwash water system includes a backwash inlet main pipe 7 and a backwash outlet main pipe 3, as shown... Figure 6As shown, the backwash inlet main pipe 7 is provided with multiple backwash inlet branch pipes 701 at its end, such as... Figure 7 As shown, the backwash inlet branch pipes 701 are respectively connected to the lower end of the corresponding ozone contact tank 6, and the end of the backwash outlet main pipe 3 is provided with multiple backwash outlet branch pipes 301, such as... Figure 7 As shown, the backwash outlet branch pipe 301 is connected to the upper end of the corresponding ozone contact tank 6, and both the backwash inlet branch pipe 701 and the backwash outlet branch pipe 301 are equipped with control valves to control the on / off of the pipeline.

[0050] like Figure 1 and Figures 7-10 As shown, the backwash air system includes a backwash air intake manifold 4, and the end of the backwash air intake manifold 4 is provided with multiple backwash air intake branch pipes 401, such as... Figure 8 and Figure 10 As shown, the backwash air inlet branch pipes 401 extend into the bottom of the corresponding ozone contact tanks 6. Multiple backwash air perforation pipes 608 are arranged at the bottom of the ozone contact tanks 6, and the middle of each backwash air perforation pipe 608 is connected to the backwash air inlet branch pipe 401. The backwash air perforation pipes 608 are provided with multiple air distribution holes for backwash air output. Additionally, a breather valve 601 is provided at the upper end of the ozone contact tank 6. The breather valve 601 is a two-way valve used for equipment air output during the air washing process. The breather valve 601 can also be used to regulate the air pressure inside the equipment during normal use. For example, when the system experiences blockage, the exhaust fan on the ozone tail gas recovery pipe 9 draws in air, causing more air to be output than intake, resulting in negative pressure in the equipment. In this case, the breather valve 601 can be controlled to allow external air to be input to balance the system pressure.

[0051] The working principle of this utility model is as follows:

[0052] In operation, the compressed air supplied by the air compressor 101 passes through the first filter 102 to remove dust particles larger than 1 micrometer, then enters the first air storage tank 103 for buffering. Next, it passes through the air-water separator 104 and the second filter 104 (oil remover) to remove water and oil mist from the air before entering the refrigerated dryer 106 (freeze dryer). The refrigerated dryer 106 cools the high-temperature compressed air, causing most of the water vapor in the air to condense and be discharged outside the machine, achieving a shallow dehydration effect. Finally, it passes through the third filter 107 (dust filter) to remove dust particles larger than 0.01 micrometers, ensuring that the water and oil mist content does not exceed 0.01 mg / m³. 3The gas then enters the second gas storage tank 108. After being buffered in the second gas storage tank 108, the gas enters the oxygen generator 109, raising the dew point temperature of the air to below -50°C and the oxygen concentration to above 90%. It then enters the third gas storage tank 110 for buffering, passes through the fourth filter 111 (dust filter) to remove impurities, and is then pressure-regulated by the pressure reducing valve 112 before finally entering the ozone generator 113. This invention, through the above design, ensures the oxygen concentration, purity (significantly reduced impurities), and dew point temperature entering the ozone generator 113, thereby ensuring that the ozone concentration and purity generated by the ozone generator 113 can meet the needs of large-volume wastewater treatment.

[0053] In operation, ozone is introduced into the ozone contact tank 6 and flows from bottom to top within it, while wastewater flows from top to bottom. The recalcitrant organic matter in the wastewater undergoes oxidation and degradation under the catalytic action of ozone and activated carbon packing. Furthermore, this invention allows for the opening of an appropriate number of inlet branch pipes 503 based on the actual wastewater volume, enabling the corresponding number of ozone contact tanks 6 to be engaged in wastewater treatment. Alternatively, all inlet branch pipes 503 can be closed, in which case the incoming water directly enters the main outlet pipe 802 via the bypass pipe 504, and the ozone contact tank group does not participate in treatment. This ensures sufficient wastewater treatment capacity while also improving the flexibility of equipment use.

[0054] The ozone contact tank assembly of this utility model is equipped with two backwashing systems: a backwash water system and a backwash air system, to meet the backwashing needs of the ozone contact tank 6. When one ozone contact tank 6 is backwashed, the other ozone contact tanks 6 can still remain online and will not affect the sewage treatment operation.

[0055] The integrated ozone generator 1 of this invention has a door on the air inlet / outlet side of its housing 116. Opening the door allows direct connection of the ozone filling pipe 2 and the ozone exhaust gas recovery pipe 9 to the ozone distribution unit 114 and the exhaust gas treatment unit 115, respectively. When the integrated ozone generator 1 needs to be moved, the operator separates the ozone filling pipe 2 from the ozone distribution unit 114, the ozone exhaust gas recovery pipe 9 from the exhaust gas treatment unit 115, and the ends of the external circulation inlet pipe 1137 and the external circulation return pipe 1138 from their respective pipes. Then, the door is closed, allowing the housing 116 to be lifted and moved as a whole. Furthermore, this invention integrates all the devices into a single rectangular housing 116, facilitating overall lifting and relocation, resulting in a more compact structure, saving project land, and simplifying the overall layout design of the wastewater treatment system.

Claims

1. A wastewater treatment system employing an integrated ozone generator, characterized in that: The system includes an integrated ozone generator (1) and an ozone contact tank assembly. The integrated ozone generator (1) includes a housing (116), and the housing (116) is equipped with an air compressor (101), a first filter (102), a first air storage tank (103), an air-water separator (104), a second filter (105), a refrigerated dryer (106), a third filter (107), a second air storage tank (108), an oxygen generator (109), a third air storage tank (110), a fourth filter (111), a pressure reducing valve (112), and an ozone generator (113) connected in series. In addition, the housing (116) is also equipped with a heat exchanger (1136) and an ozone distribution unit. The ozone generator (113) is connected to the ozone generator (113) via an internal circulation pipeline group (114) and an ozone exhaust gas treatment unit (115). The ozone generator (113) has an ozone output end connected to the ozone distribution unit (114) via an ozone output pipe (1131). The output side of the ozone distribution unit (114) is provided with multiple ozone filling pipes (2), and each ozone filling pipe (2) is connected to the corresponding ozone contact tank (6) in the ozone contact tank group. Each ozone contact tank (6) is connected to the ozone exhaust gas treatment unit (115) via an ozone exhaust gas recovery pipe (9). The ozone contact tank group has an inlet pipe group (5) on one side and an outlet pipe group (8) on the other side.

2. The wastewater treatment system using an integrated ozone generator according to claim 1, characterized in that: The air compressor (101), the first air tank (103), the refrigerated dryer (106), the second air tank (108), and the ozone exhaust gas treatment unit (115) are sequentially arranged on one side of the box (116). The ozone generator (113), the third air tank (110), the oxygen generator (109), the heat exchanger (1136), and the ozone distribution unit (114) are sequentially arranged on the other side of the box (116). An air intake fan (1161) is provided on the side wall of the box (116) corresponding to the outside of the air compressor (101). An exhaust fan (1162) is provided on the side wall of the box (116) corresponding to the outside of the ozone generator (113). In addition, an ozone leak detector and an oxygen leak detector are provided inside the box (116).

3. The wastewater treatment system using an integrated ozone generator according to claim 1, characterized in that: The internal circulation pipeline group between the ozone generator (113) and the heat exchanger (1136) includes an internal circulation outlet pipe (1132) and an internal circulation return pipe (1133). One end of the internal circulation outlet pipe (1132) is connected to the outlet port on the ozone generator (113), and the other end is connected to the circulation inlet port on the heat exchanger (1136). One end of the internal circulation return pipe (1133) is connected to the circulation outlet port on the heat exchanger (1136), and the other end is connected to the inlet port on the ozone generator (113). The hot water inlet port on the heat exchanger (1136) is connected to the external circulation inlet pipe (1137), and the hot water outlet port on the heat exchanger (1136) is connected to the external circulation return pipe (1138).

4. The wastewater treatment system using an integrated ozone generator according to claim 3, characterized in that: The internal circulation return water pipe (1133) is equipped with a flow control element (1135) and a temperature control element (1134).

5. The wastewater treatment system using an integrated ozone generator according to claim 3, characterized in that: The box (116) has an opening door on the air inlet / outlet side that can be opened to allow the ozone filling pipe (2) and ozone exhaust gas recovery pipe (9) to enter. The ends of the external circulation water inlet pipe (1137) and the external circulation water return pipe (1138) are both located outside the box (116) and are both equipped with quick-connect fittings.

6. The wastewater treatment system using an integrated ozone generator according to claim 1, characterized in that: The ozone exhaust gas treatment unit (115) is provided with an exhaust pipe (1151) on one side. The ozone distribution unit (114) is provided with multiple gas pumps (1141). The ozone output pipe (1131) is provided with multiple output branches at its end. Each output branch is connected to the input end of the corresponding gas pump (1141). The output end of each gas pump (1141) is connected to the corresponding ozone gas supply pipe (2).

7. The wastewater treatment system using an integrated ozone generator according to claim 1, characterized in that: The water inlet pipe assembly (5) includes a main water inlet pipe (501) and a distribution pipe (502). The main water inlet pipe (501) is connected to the distribution pipe (502). The distribution pipe (502) is provided with multiple water inlet branch pipes (503), and each water inlet branch pipe (503) is connected to the upper end of the corresponding ozone contact tank (6). The water outlet pipe assembly (8) includes a main water outlet pipe (802), and the main water outlet pipe (802) is provided with multiple water outlet branch pipes (801). Each water outlet branch pipe (801) is connected to the lower end of the corresponding ozone contact tank (6). In addition, the distribution pipe (502) is provided with a bypass pipe (504) connected to the main water outlet pipe (802). The water inlet branch pipes (503), bypass pipes (504) and water outlet branch pipes (801) are all provided with control valves to control the opening and closing of the pipeline.

8. The wastewater treatment system using an integrated ozone generator according to claim 1, characterized in that: The ozone contact tank (6) is provided with an ozone aeration pipe network (6061) at the bottom, and the ozone filling pipe (2) is connected to the ozone aeration pipe network (6061) at the bottom of the corresponding ozone contact tank (6). The ozone aeration pipe network (6061) is provided with an ozone aeration head (606), and the ozone contact tank (6) is provided with an ozone tail gas output pipe (602) at the top, which is connected to the ozone tail gas recovery pipe (9).

9. The wastewater treatment system using an integrated ozone generator according to claim 1, characterized in that: The ozone contact tank group includes a backwash water system, which includes a backwash inlet main pipe (7) and a backwash outlet main pipe (3). The backwash inlet main pipe (7) is provided with multiple backwash inlet branch pipes (701) at its end. The backwash inlet branch pipes (701) are respectively connected to the lower end of the corresponding ozone contact tank (6). The backwash outlet main pipe (3) is provided with multiple backwash outlet branch pipes (301) at its end. The backwash outlet branch pipes (301) are respectively connected to the upper end of the corresponding ozone contact tank (6). The backwash inlet branch pipes (701) and the backwash outlet branch pipes (301) are each provided with a control valve to control the opening and closing of the pipeline.

10. The wastewater treatment system using an integrated ozone generator according to claim 1, characterized in that: The ozone contact tank assembly includes a backwash gas system, which includes a backwash air intake manifold (4) and multiple backwash air intake branch pipes (401) at the end of the backwash air intake manifold (4). The backwash air intake branch pipes (401) extend into the bottom of the corresponding ozone contact tank (6). Multiple backwash cloth air perforated pipes (608) are arranged at the bottom of the ozone contact tank (6), and the middle of each backwash cloth air perforated pipe (608) is connected to the backwash air intake branch pipe (401). A breather valve (601) is provided at the upper end of the ozone contact tank (6).

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