Catalytic ozonation device

Abstract

The utility model discloses a catalytic ozonation device which comprises a catalytic reaction tower, an ozone aeration structure and an oil recovery structure, the catalytic reaction tower is provided with a liquid inlet, a first liquid outlet and a gas outlet, and a catalyst packing layer is arranged in the catalytic reaction tower; the gas outlet, the liquid inlet, the catalyst packing layer and the first liquid outlet are sequentially arranged at intervals in the vertical direction of the catalytic reaction tower; the ozone aeration structure comprises a first aeration disc and an ozone generator, the first aeration disc is located below the catalyst packing layer, and the ozone generator is connected with the first aeration disc; according to the catalytic reaction tower disclosed by the utility model, a mode of feeding water and discharging water is adopted, the first aeration disc is positioned below the catalyst packing layer, oil is prevented from being attached to the surface of a catalyst, and an oil recovery structure is arranged, so that a water-oil mixture gathered on the liquid level of wastewater can be recovered, and the treatment effect of the catalytic reaction tower is ensured.

Description

Technical Field

[0001] This utility model relates to the field of high-salt organic wastewater treatment, and in particular to an ozone catalytic oxidation device. Background Technology

[0002] Existing ozone catalytic oxidation equipment uses a bottom-inlet and top-outlet method to treat wastewater, with the catalyst located above the aeration disc. However, when treating high-salt organic wastewater, organic matter (oil) is generated during the treatment process. Most of the organic matter (oil) floats to the surface, while some organic matter (oil) adheres to the catalyst surface and floats on the water surface, affecting the equipment's treatment effect. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes an ozone catalytic oxidation device.

[0004] The technical solution of this utility model is as follows: it includes a catalytic reaction tower, an ozone aeration structure, and an oil recovery structure. The catalytic reaction tower has a cavity and an inlet, a first outlet, and a gas outlet communicating with the cavity. The gas outlet, the inlet, and the first outlet are arranged sequentially from top to bottom on the catalytic reaction tower. A catalyst packing layer is disposed in the cavity between the inlet and the first outlet in the vertical direction. Wastewater enters the cavity through the inlet and forms a wastewater surface. The ozone aeration structure includes a first aeration disc and an ozone generator. The first aeration disc is installed in the cavity and located below the catalyst packing layer. The ozone generator is connected to the first aeration disc. The oil recovery structure can collect the water-oil mixture on the wastewater surface and discharge it outside the catalytic reaction tower.

[0005] Furthermore, the oil recovery structure includes:

[0006] An overflow component has a receiving cavity capable of collecting the water-oil mixture. The overflow component has an overflow port communicating with the receiving cavity. The overflow port is higher than the wastewater surface. At least a portion of the water-oil mixture located on the wastewater surface can enter the receiving cavity through the overflow port under the action of the gas sprayed from the first aeration disc.

[0007] A first connecting pipe, one end of which extends into the accommodating cavity, and the other end of which is located outside the catalytic reaction tower;

[0008] A first pump is installed on the first connecting pipe, and the first pump can pump the water-oil mixture in the accommodating cavity to the outside of the catalytic reaction tower through the first connecting pipe.

[0009] Furthermore, the oil recovery structure also includes:

[0010] The recycling tank has an inlet and an outlet at its upper and lower ends, respectively, and an oil outlet on its side wall. The inlet is connected to the other end of the first connecting pipe.

[0011] The second connecting pipe has one end connected to the water outlet and the other end connected to the interior of the cavity. A second pump is installed on the second connecting pipe, which can pump the solution in the recovery tank to the cavity through the second connecting pipe.

[0012] Furthermore, the ozone aeration structure also includes a second aeration disc, which is installed in the cavity and located between the liquid inlet and the catalyst packing layer. The second aeration disc is connected to the ozone generator.

[0013] Furthermore, both the first aeration disc and the second aeration disc include a disc plate and a plurality of microporous aeration heads. The plurality of microporous aeration heads are mounted on the disc plate and are connected to the ozone generator. Each microporous aeration head has a jet hole capable of spraying ozone upward.

[0014] Furthermore, the ozone catalytic oxidation device also includes a heating device installed inside the cavity, located between the liquid inlet and the catalyst packing layer.

[0015] Furthermore,

[0016] The heating device is a heat pipe;

[0017] The ozone catalytic oxidation device also includes an MVR distilled water storage tank located outside the catalytic reaction tower. The MVR distilled water storage tank contains distilled water, which can be driven to circulate between the MVR distilled water storage tank and the heat-conducting pipe.

[0018] Furthermore, the ozone catalytic oxidation device also includes a third connecting pipe, one end of which is connected to the gas outlet, and the other end of which is located inside the MVR distilled water storage tank. The other end of the third connecting pipe is connected to a third aeration disc.

[0019] Furthermore, the ozone catalytic oxidation device also includes a pH adjustment and dosing device. The wastewater, after being treated by the pH adjustment and dosing device, is then transported to the inlet. The pH adjustment and dosing device includes:

[0020] The equalization tank is connected to the liquid inlet through a fourth connecting pipe. A third pump is installed on the fourth connecting pipe, which can pump the wastewater in the equalization tank to the liquid inlet through the fourth connecting pipe.

[0021] The dosing tank is connected to the fourth connecting pipe via a fifth connecting pipe. The connection point between the fifth connecting pipe and the fourth connecting pipe is located between the third pump and the liquid inlet on the fourth connecting pipe. The fourth pump is installed on the fifth connecting pipe, and the fourth pump can pump the liquid in the dosing tank to the fourth connecting pipe through the fifth connecting pipe.

[0022] Furthermore, the catalytic reaction tower has a second liquid outlet communicating with the interior of the cavity, and the ozone catalytic oxidation device also includes a sixth connecting pipe. One end of the sixth connecting pipe is connected to the second liquid outlet, and the other end of the sixth connecting pipe is connected to the regulating tank. A fifth pump is installed on the sixth connecting pipe, and the fifth pump can pump the wastewater in the cavity to the regulating tank through the sixth connecting pipe.

[0023] The first outlet is connected to a seventh connecting pipe, and a sixth pump and a first switch valve are installed on the seventh connecting pipe. The sixth pump can pump the wastewater in the cavity to the outside of the catalytic reaction tower through the seventh connecting pipe. The sixth pump and the first switch valve are arranged sequentially on the seventh connecting pipe along the water outlet direction.

[0024] The ozone catalytic oxidation device also includes a downward water distributor located inside the cavity and connected to the liquid inlet.

[0025] The ozone catalytic oxidation device of this utility model has at least the following technical effects: By arranging the inlet, catalyst packing layer, and first outlet sequentially along the vertical direction of the catalytic reaction tower, and by placing the first aeration disc below the catalyst packing layer, most of the oil is collected on the wastewater surface by the bubbles generated by the first aeration disc before passing through the catalyst packing layer, thus preventing oil from adhering to the catalyst surface. Furthermore, an oil recovery structure is provided to recover the water-oil mixture collected on the wastewater surface, ensuring the treatment effect of the catalytic reaction tower. It has an overflow device and a recovery tank, which can further process water-oil mixtures. Oil and solution can be output separately, and the solution can be returned to the catalytic reaction tower. By setting up a heating device, crystallization of high-salt organic wastewater on the catalyst of the first aeration plate, the second aeration plate, and the catalyst packing layer is avoided. By setting up an MVR distilled water storage tank, the distilled water from the subsequent process (MVR evaporation process) can be used to heat the heat conduction pipe and treat the exhaust gas discharged from the outlet, thus eliminating the need for an additional ozone destroyer, and the residual exhaust gas can be reused (by treating the organic matter in the distilled water).

[0026] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0027] Additional aspects and advantages of this utility model will become apparent and readily understood from the description of the technical solution in conjunction with the following drawings, wherein:

[0028] Figure 1 This is a schematic diagram of an ozone catalytic oxidation device without a heating device and an MVR distilled water storage tank.

[0029] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0030] Figure 3 This is a schematic diagram of the structure of the first and second aeration discs;

[0031] Figure 4 This is a schematic diagram of the ozone catalytic oxidation device.

[0032] Figure 5 This is a schematic diagram showing the connection between the pH adjustment and dosing device, the sixth connecting pipe, the seventh connecting pipe, the oil recovery structure, and the catalytic reaction tower.

[0033] Figure reference numerals: Catalytic reaction tower 100, cavity 101, wastewater surface 102, inlet 110, first outlet 120, gas outlet 130, catalyst packing layer 140, second outlet 150, seventh connecting pipe 151, sixth pump 152, first switch valve 153, pH adjustment and dosing device 200, fourth connecting pipe 201, third pump 202, fifth connecting pipe 203, fourth pump 204, inlet valve 205, one-way valve 206, first check valve 207, second check valve 208, regulating tank 210, dosing tank 220, ozone aeration structure 300, first aeration disc 310, disc plate 311, microporous aeration head 312, ozone generator 320, second Aeration disc 330, air inlet pipe 340, air inlet valve 341, oil recovery structure 400, overflow component 410, accommodating cavity 411, overflow port 412, first connecting pipe 420, first pump 430, recovery tank 440, inlet 441, water outlet 442, oil outlet 443, second connecting pipe 450, second pump 451, check valve 452, heating device 500, distilled water inlet 501, distilled water outlet 502, seventh pump 503, MVR distilled water storage tank 600, first pipe 610, second pipe 620, third connecting pipe 700, third aeration disc 710, sixth connecting pipe 800, fifth pump 810, second switch valve 820, water distributor 900. Detailed Implementation

[0034] The technical solution of this utility model is described in detail below. Examples of the technical solution are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The technical solution described below with reference to the accompanying drawings is exemplary and is only used to explain this utility model, and should not be construed as limiting this utility model.

[0035] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, left, right, etc., indicating the directional or positional relationship, are based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0036] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0037] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0038] Reference Figure 1 As shown, the ozone catalytic oxidation device provided in the embodiment of this utility model includes a catalytic reaction tower 100, an ozone aeration structure 300, and an oil recovery structure 400. The catalytic reaction tower 100 has a cavity 101 and an inlet 110, a first outlet 120, and an outlet 130 communicating with the cavity 101. The outlet 130, inlet 110, and first outlet 120 are arranged sequentially and alternately from top to bottom on the catalytic reaction tower 100. The cavity 101 is provided with an outlet 110 located between the inlet 110 and the first outlet 120 in the vertical direction. The catalyst packing layer 140 between the liquid outlets 120 allows wastewater to enter the cavity 101 through the liquid inlet 110 and form a wastewater surface 102. The ozone aeration structure 300 includes a first aeration disc 310 and an ozone generator 320. The first aeration disc 310 is installed in the cavity 101 and located below the catalyst packing layer 140. The ozone generator 320 is connected to the first aeration disc 310. The oil recovery structure 400 can collect the water-oil mixture located on the wastewater surface 102 and discharge it outside the catalytic reaction tower 100.

[0039] By arranging the inlet 110, catalyst packing layer 140, and first outlet 120 sequentially along the vertical direction of the catalytic reaction tower 100, and by positioning the first aeration disc 310 below the catalyst packing layer 140, most of the oil is collected on the wastewater surface 102 by the bubbles generated by the first aeration disc 310 before passing through the catalyst packing layer 140. This prevents oil from adhering to the catalyst surface, extends the catalyst's operating time, and increases the possibility of subsequent catalyst regeneration and secondary utilization. Furthermore, an oil recovery structure 400 is provided to recover the water-oil mixture collected on the wastewater surface 102, ensuring the treatment effect of the catalytic reaction tower 100.

[0040] It is understandable that without the oil recovery structure 400, oil will also accumulate above the wastewater surface 102. The catalytic reaction tower 100 can be equipped with an openable cover, which can be used to treat the oil.

[0041] At work, such as Figure 1 As shown, wastewater enters the cavity 101 through the inlet 110, and at the same time, the ozone generator 320 is started, and the first aeration disc 310 sprays ozone at the bottom of the catalytic reaction tower 100.

[0042] The first outlet 120 is closed first, and wastewater is continuously supplied. The wastewater level 102 gradually rises until it reaches the position where the oil recovery structure 400 can recover the water-oil mixture. At this time, the outflow rate of the first outlet 120 and the inflow rate of the inlet 110 are controlled to keep the wastewater level 102 at the position where the oil recovery structure 400 can recover the water-oil mixture. The wastewater mixes with the upward-flowing ozone. When the mixed wastewater passes through the catalyst packing layer 140, the catalyst packing layer 140 adsorbs organic matter and provides active sites for contact with the ozone reaction, ensuring further mineralization of the organic wastewater. After passing through the catalyst packing layer 140, the wastewater is discharged through the first outlet 120.

[0043] When the first aeration disc 310 is working, it will generate dense ozone gas. As the dense ozone gas rises, it will carry most of the organic matter (oil) generated during the treatment process to rise, causing it to accumulate on the wastewater surface 102. When the oil recovery structure 400 is working, it collects the water-oil mixture located on the wastewater surface 102 and transports it to the outside of the catalytic reaction tower 100.

[0044] Specifically, the catalyst packing layer 140 uses a porous carbon-based catalyst supported on metal. It is understood that the catalyst packing layer 140 may also use other catalysts suitable for treating high-salt organic wastewater.

[0045] Specifically, such as Figure 1 As shown, the gas outlet 130 is located at the top of the catalytic reaction tower 100, the liquid inlet 110 is located at the top of the left side wall of the catalytic reaction tower 100, the first liquid outlet 120 is located at the bottom of the right side wall of the catalytic reaction tower 100, and the ozone generator 320 is located on the left side of the catalytic reaction tower 100. The above arrangement facilitates the layout of pipes. It can be understood that, provided that wastewater can enter from the top and exit from the bottom, other layout methods can also be adopted. For example, the liquid inlet 110 is located at the top of the right side wall of the catalytic reaction tower 100, the first liquid outlet 120 is located at the bottom of the left side wall of the catalytic reaction tower 100, and the ozone generator 320 is located on the right side of the catalytic reaction tower 100, or the liquid inlet 110 and the first liquid outlet 120 are located at the top and bottom of the same side wall of the catalytic reaction tower 100, respectively.

[0046] Furthermore, such as Figure 1 , 2 As shown, the oil recovery structure 400 includes:

[0047] The overflow component 410 has a receiving cavity 411 capable of collecting a water-oil mixture. The overflow component 410 has an overflow port 412 communicating with the receiving cavity 411. The overflow port 412 is higher than the wastewater liquid surface 102. At least a portion of the water-oil mixture located on the wastewater liquid surface 102 can enter the receiving cavity 411 through the overflow port 412 under the action of the gas sprayed from the first aeration disc 310.

[0048] The first connecting pipe 420 has one end extending into the receiving cavity 411 and the other end located outside the catalytic reaction tower 100.

[0049] The first pump 430 is installed on the first connecting pipe 420. The first pump 430 can pump the water-oil mixture in the accommodating cavity 411 to the outside of the catalytic reaction tower 100 through the first connecting pipe 420.

[0050] The oil recovery structure 400 adopts this structure, which facilitates the recovery of water-oil mixtures.

[0051] During operation, the first aeration disc 310 generates dense ozone gas. As the dense ozone gas rises, it carries most of the organic matter (oil) generated during the treatment process upwards, causing it to accumulate on the wastewater surface 102. The ozone gas also causes bubbles to form on the wastewater surface 102. The solution and oil (water-oil mixture) on the wastewater surface 102 are pushed over the overflow port 412 by the bubbles and enter the containment chamber 411. When the containment chamber 411 stores a certain amount of water-oil mixture, the first pump 430 starts, and the water-oil mixture is discharged to the outside of the catalytic reaction tower 100 through the first connecting pipe 420.

[0052] Understandably, the first pump 430 can also be kept running continuously to extract the water-oil mixture.

[0053] Specifically, such as Figure 2 As shown, the accommodating cavity 411 is an upper-opening cavity, and the opening at the upper end of the cavity is an overflow port 412.

[0054] It is understandable that the height of the overflow port 412 is slightly higher than the height of the wastewater surface 102, so that the water-oil mixture can pass over the overflow port 412 under the action of air bubbles. However, while ensuring that the water-oil mixture can pass over the overflow port 412, the height of the overflow port 412 does not necessarily have to be slightly higher than the height of the wastewater surface 102. For example, the height of the overflow port 412 can be much higher than the height of the wastewater surface 102.

[0055] Furthermore, such as Figure 1 As shown, the oil recovery structure 400 also includes:

[0056] The recycling tank 440 has an inlet 441 and a water outlet 442 at its upper and lower ends, respectively. The side wall of the recycling tank 440 has an oil outlet 443. The inlet 441 is connected to the other end of the first connecting pipe 420.

[0057] The second connecting pipe 450 has one end connected to the outlet 442 and the other end connected to the interior of the cavity 101. A second pump 451 is installed on the second connecting pipe 450, which can pump the solution in the recovery tank 440 to the cavity 101 through the second connecting pipe 450.

[0058] By providing a recovery tank 440 and a second connecting pipe 450, the water-oil mixture can be further processed to separate the oil and the solution. The oil can be discharged externally, and the solution can be returned to the catalytic reaction tower 100.

[0059] During operation, the water-oil mixture overflows into the containment chamber 411. The first pump 430 starts and the second pump 451 stops. The water-oil mixture in the containment chamber 411 enters the recovery tank 440 through the first connecting pipe 420 and the inlet 441. Since the second pump 451 is off, the recovery tank 440 stores the water-oil mixture. The height of the water-oil mixture in the recovery tank 440 gradually increases. When it reaches the height of the oil outlet 443, the oil above the solution flows out of the recovery tank 440 through the oil outlet 443. After the oil has flowed out, the first pump 430 stops and the second pump 451 starts. The second pump 451 transports the solution in the recovery tank 440 to the catalytic reaction tower 100 to realize the recovery of the solution.

[0060] It is understandable that the oil in the recovery tank 440 can flow out of the recovery tank 440 by its own weight, or the oil in the recovery tank 440 can also flow out of the recovery tank 440 by other means (such as pumping).

[0061] Specifically, such as Figure 1 As shown, the second pump 451 is a flow pump, and a check valve 452 is also provided on the second connecting pipe 450. The check valve 452 is further away from the outlet 442 than the second pump 451.

[0062] Check valve 452 is used to prevent liquid backflow in cavity 101.

[0063] Specifically, the recovery tank 440 is set vertically to facilitate the discharge of oil from the recovery tank 440.

[0064] Furthermore, such as Figure 1As shown, the ozone aeration structure 300 also includes a second aeration disc 330, which is installed in the cavity 101 and located between the liquid inlet 110 and the catalyst packing layer 140. The second aeration disc 330 is connected to the ozone generator 320.

[0065] By setting up a first aeration disc 310 and a second aeration disc 330, the first aeration disc 310 allows the wastewater to come into full contact with ozone, while the second aeration disc 330 allows the wastewater to dissolve a greater number of ozone molecules, thus enabling the wastewater to come into more full contact with ozone.

[0066] Specifically, the ozone generator 320 is connected to the first aeration disc 310 and the second aeration disc 330 respectively through the air inlet pipe 340. The air inlet pipe 340 is equipped with an air inlet valve 341, which controls the opening and closing of the air inlet pipe 340.

[0067] Furthermore, such as Figure 1 , 3 As shown, both the first aeration disc 310 and the second aeration disc 330 include a disc plate 311 and a plurality of microporous aeration heads 312. The plurality of microporous aeration heads 312 are mounted on the disc plate 311 and are connected to the ozone generator 320. Each microporous aeration head 312 has a jet hole (not shown in the figure) that can spray ozone upward.

[0068] Both the first aeration disc 310 and the second aeration disc 330 adopt this structure in order to generate dense bubbles better and to better achieve the flotation effect on oil. The microporous aeration head 312 is equipped with a jet hole that can spray ozone upward, so that the ozone can be mixed more evenly with the wastewater and that most of the oil can be more easily gathered on the wastewater surface 102.

[0069] Specifically, multiple microporous aeration heads 312 are connected to the ozone generator 320 for convenient ozone delivery. It is understood that the multiple microporous aeration heads 312 can be connected in series, in parallel, or in other suitable forms to the ozone generator 320.

[0070] Specifically, the microporous aerator head 312 is made of titanium alloy, which makes the denser bubbles produced by the microporous aerator head 312 better and makes the microporous aerator head 312 more durable.

[0071] Specifically, the multiple microporous aeration heads 312 are arranged in parallel. It can be inferred that, while ensuring the generation of dense bubbles, the multiple microporous aeration heads 312 can also be arranged in other ways.

[0072] Furthermore, such as Figure 4As shown, it also includes a heating device 500, which is installed in the cavity 101 and is located between the liquid inlet 110 and the catalyst packing layer 140.

[0073] By incorporating a heating device 500, which heats the wastewater, problems such as crystallization blockage, insufficient aeration, insufficient ozone addition, and low ozone solubility at low temperatures in the first aeration disc 310 and the second aeration disc 330 under conditions of large temperature differences are avoided. Furthermore, surface crystallization of the catalyst in the catalyst packing layer 140 is prevented, thereby avoiding the problem of missing active sites and improving catalytic efficiency.

[0074] Specifically, such as Figure 4 As shown, the heating device 500 is located between the inlet 110 and the second aeration disc 330, so that the wastewater is heated by the heating device 500 before flowing sequentially through the second aeration disc 330, the catalyst packing layer 140, and the first aeration disc 310, thus better preventing crystallization of the first aeration disc 310, the second aeration disc 330, and the catalyst. It is understood that, while ensuring that crystallization of the first aeration disc 310, the second aeration disc 330, and the catalyst is avoided, the heating device 500 can also be located in other positions within the catalytic reaction tower 100, for example, between the second aeration disc 330 and the catalyst packing layer 140.

[0075] Furthermore, such as Figure 4 As shown,

[0076] The heating device 500 is a heat pipe;

[0077] The ozone catalytic oxidation device also includes an MVR distilled water storage tank 600, which is located outside the catalytic reaction tower 100. The MVR distilled water storage tank 600 stores distilled water, which can be driven to circulate between the MVR distilled water storage tank 600 and the heat-conducting pipe.

[0078] Distilled water in the MVR distilled water storage tank 600 is transported to the heat pipe. The distilled water in the heat pipe can exchange heat with the wastewater outside the heat pipe, thereby heating the wastewater and making full use of the heat of the distilled water.

[0079] Specifically, such as Figure 4 As shown, the heat pipe has a distillation water inlet 501 and a distillation water outlet 502. The MVR distillation water storage tank 600 is connected to the distillation water inlet 501 through a first pipe 610, and the MVR distillation water storage tank 600 is connected to the distillation water outlet 502 through a second pipe 620. A seventh pump 503 is installed on the first pipe 610.

[0080] During operation, the seventh pump 503 starts, and distilled water circulates between the MVR distilled water storage tank 600 and the heat pipe through the first pipe 610 and the second pipe 620.

[0081] When it is necessary to control the wastewater temperature, the flow rate of distilled water in the first pipe 610 and the second pipe 620 can be changed by adjusting the speed of the seventh pump 503, thereby controlling the heat transfer effect and ultimately achieving the purpose of regulating the wastewater temperature.

[0082] Specifically, the heat pipe is a spiral-shaped heat pipe made of titanium alloy. This structure and material ensure that the wastewater passes through the second aeration plate 330, the catalyst packing layer 140, and the first aeration plate 310 at a suitable temperature. It is understandable that other materials and shapes could be used for the heat pipe, provided that its service life and thermal conductivity are guaranteed.

[0083] Furthermore, such as Figure 4 As shown, it also includes a third connecting pipe 700, one end of which is connected to the air outlet 130, and the other end of which is located inside the MVR distilled water storage tank 600. The other end of the third connecting pipe 700 is connected to a third aeration disc 710.

[0084] Specifically, the third aeration disc 710 is located below the surface of the distilled water.

[0085] By using distilled water to destroy ozone exhaust gases, distilled water can be fully utilized, thus eliminating the need for a separate ozone destroyer.

[0086] To further explain, due to the high salt content of high-salt organic wastewater, after the oil removal and organic matter reduction processes (after ozone catalytic oxidation), the wastewater needs to be desalinated before it can be discharged. Therefore, an MVR evaporation process needs to be added after the conventional oil removal process. This process mainly uses steam to separate salt and water, and the by-products are distilled water and miscellaneous salts. During operation, the water treated by the catalytic reaction tower 100 is discharged through the first outlet 120 and enters the MVR evaporation unit. The distilled water produced by the MVR evaporation unit when evaporating the wastewater enters the MVR distilled water storage tank 600.

[0087] Because wastewater treated by ozone catalytic oxidation still contains residual organic matter, some volatile organic compounds will enter the distilled water along with the water vapor, directly affecting the discharge and recycling of distilled water. In other words, distilled water is characterized by high temperature and the presence of organic matter. To address these characteristics, it can be used in conjunction with catalytic reaction tower 100.

[0088] 1. Utilize the residual heat of distilled water in conjunction with a heat pipe to heat wastewater;

[0089] 2. The high temperature of distilled water and residual organic matter are used to destroy ozone exhaust gas, thereby treating the exhaust gas discharged from the catalytic reaction tower 100;

[0090] 3. Organic matter in distilled water is also oxidized by ozone exhaust gas, meeting the standards for discharge or recycling.

[0091] Furthermore, such as Figure 5 As shown, it also includes a pH adjustment and dosing device 200. Wastewater treated by the pH adjustment and dosing device 200 is then transported to the inlet 110. The pH adjustment and dosing device 200 includes:

[0092] The equalization tank 210 is connected to the liquid inlet 110 through the fourth connecting pipe 201. A third pump 202 is installed on the fourth connecting pipe 201. The third pump 202 can pump the wastewater in the equalization tank 210 to the liquid inlet 110 through the fourth connecting pipe 201.

[0093] The dosing tank 220 is connected to the fourth connecting pipe 201 via the fifth connecting pipe 203. The connection point between the fifth connecting pipe 203 and the fourth connecting pipe 201 is located between the third pump 202 and the liquid inlet 110 on the fourth connecting pipe 201. The fifth connecting pipe 203 is equipped with a fourth pump 204, which can pump the liquid in the dosing tank 220 to the fourth connecting pipe 201 through the fifth connecting pipe 203.

[0094] The equalization tank 210 facilitates the adjustment of the pH value of the wastewater; the dosing tank 220 facilitates the addition of appropriate chemicals according to the actual situation. For example, if the chemical oxygen demand (COD) is high, hydrogen peroxide needs to be added in proportion in the dosing tank 220.

[0095] During operation, the equalization tank 210 adjusts the wastewater according to the actual situation of the wastewater, for example, adjusting the pH of the wastewater to 7-8. The dosing tank 220 adds hydrogen peroxide (dosing) according to the organic matter content of the influent. After the adjustment is completed, the third pump 202 and the fourth pump 204 are started. The liquid in the fifth connecting pipe 203 is mixed with the liquid in the fourth connecting pipe 201. The mixed wastewater enters the catalytic reaction tower 100 through the liquid inlet 110.

[0096] Specifically, the dosing tank 220 can be used in conjunction with the heating device 500. When the catalyst packing layer 140 needs to be eluted and regenerated, a strong alkaline solution is added to the dosing tank 220. The strong alkaline solution elutes and regenerates the catalyst packing layer 140. The heating device 500 can heat the strong alkaline solution to accelerate the elution and regeneration of the catalyst packing layer 140.

[0097] Specifically, such as Figure 5As shown, an inlet valve 205 is also provided on the fourth connecting pipe 201, and a one-way valve 206 to prevent wastewater backflow is also provided on the fifth connecting pipe 203. The inlet valve 205 is located between the third pump 202 and the connection between the fifth connecting pipe 203 and the fourth connecting pipe 201. The one-way valve 206 is close to the connection between the fifth connecting pipe 203 and the fourth connecting pipe 201. The fourth pump 204 is far away from the connection between the fifth connecting pipe 203 and the fourth connecting pipe 201.

[0098] The inlet valve 205 is used to control the opening and closing of the fourth connecting pipe 201.

[0099] Specifically, such as Figure 5 As shown, a first check valve 207 is also provided on the fourth connecting pipe 201. The first check valve 207 is located between the outlet end of the regulating tank 210 and the third pump 202. The first check valve 207 prevents the liquid in the fourth connecting pipe 201 from flowing back into the regulating tank 210.

[0100] It is understood that this utility model does not necessarily use the first check valve 207. Other valves may be used as long as it can prevent the liquid in the fourth connecting pipe 201 from flowing back to the regulating tank 210.

[0101] Specifically, such as Figure 5 As shown, a second check valve 208 is also installed on the fifth connecting pipe 203. The second check valve 208 is located between the water outlet of the dosing tank 220 and the fourth pump 204. The second check valve 208 prevents the liquid in the fifth connecting pipe 203 from flowing back into the dosing tank 220.

[0102] It is understood that this utility model does not necessarily use the second check valve 208. Other valves may be used as long as it can prevent the liquid in the fifth connecting pipe 203 from flowing back to the dosing tank 220.

[0103] Furthermore, such as Figure 5 As shown,

[0104] The catalytic reaction tower 100 has a second liquid outlet 150 that communicates with the interior of the cavity 101. The ozone catalytic oxidation device also includes a sixth connecting pipe 800. One end of the sixth connecting pipe 800 is connected to the second liquid outlet 150, and the other end of the sixth connecting pipe 800 is connected to the equalization tank 210. A fifth pump 810 is installed on the sixth connecting pipe 800. The fifth pump 810 can pump the wastewater in the cavity 101 to the equalization tank 210 through the sixth connecting pipe 800.

[0105] The first outlet 120 is connected to a seventh connecting pipe 151. A sixth pump 152 and a first switch valve 153 are installed on the seventh connecting pipe 151. The sixth pump 152 can pump the wastewater in the cavity 101 to the outside of the catalytic reaction tower 100 through the seventh connecting pipe 151. The sixth pump 152 and the first switch valve 153 are sequentially installed on the seventh connecting pipe 151 along the water outlet direction.

[0106] The ozone catalytic oxidation device also includes a water distributor 900 that distributes water downwards. The water distributor 900 is located inside the cavity 101 and is connected to the liquid inlet 110.

[0107] By installing a sixth connecting pipe 800, the wastewater in the catalytic reaction tower 100 can be returned to the equalization tank 210 through the sixth connecting pipe 800, so that it can be fully mixed with the unreacted wastewater to ensure that the effluent meets the discharge standards (i.e., the wastewater is recycled to ensure that the effluent meets the discharge standards); by installing a water distributor 900, the wastewater can be mixed with ozone more evenly.

[0108] like Figure 5 As shown, during operation, the sixth pump 152 and the first switch valve 153 are closed, and the wastewater in the catalytic reaction tower 100 cannot be discharged from the first outlet 120 and the seventh connecting pipe 151. The third pump 202 and the fifth pump 810 are started, and the wastewater in the catalytic reaction tower 100 circulates between the catalytic reaction tower 100 and the regulating tank 210 through the sixth connecting pipe 800 and the fourth connecting pipe 201.

[0109] Specifically, the water distributor 900 has a drain hole (not shown in the figure), and the water outlet of the drain hole is directed toward the bottom of the catalytic reaction tower 100, so that the wastewater is mixed with ozone more evenly.

[0110] Specifically, such as Figure 5 As shown, a second switching valve 820 is also provided on the sixth connecting pipe 800. The second switching valve 820 is further away from the second outlet 150 relative to the fifth pump 810.

[0111] By setting the second switch valve 820, the on / off state of the sixth connecting pipe 800 can be controlled by the second switch valve 820, and the flow rate of the sixth connecting pipe 800 can be controlled by the fifth pump 810.

[0112] Specifically, provided that the floating oil does not flow back to the equalization tank 210, the second outlet 150 can be located at any position below the inlet 110. For example, it can be located below the heating device 500 or below the catalyst packing layer 140.

[0113] When this utility model is working, such as Figure 1-5As shown, the wastewater is thoroughly mixed with the added acid and alkali solutions in the equalization tank 210 to adjust the pH to 7-8. Based on the organic matter content of the influent, hydrogen peroxide is added to the dosing tank 220. After adjustment, the third pump 202 and the fourth pump 204 are started, the inlet valve 205 is opened, and the liquid in the fifth connecting pipe 203 mixes with the liquid in the fourth connecting pipe 201. The mixed wastewater enters the distributor 900 through the inlet 110, and the distributor 900 sprays the wastewater downwards. Simultaneously, the ozone generator 320 and the air inlet valve 341 are started. The ozone from the ozone generator 320 is transported to the first aeration disc 310 and the second aeration disc 330 through the air inlet pipe 340. The first aeration disc 310... Ozone is sprayed upward from the bottom of the catalytic reaction tower 100. The second aeration disc 330 sprays ozone upward between the heat-conducting pipe and the catalyst packing layer 140. The sixth pump 152 and the first switch valve 153 are closed. The wastewater in the catalytic reaction tower 100 cannot be discharged from the first outlet 120 and the seventh connecting pipe 151. The wastewater level 102 gradually rises as the third pump 202 and the fourth pump 204 continuously pump liquid. The wastewater level 102 rises until it is slightly lower than the overflow port 412. After the rise, the speed of the third pump 202 and the sixth pump 152 is controlled to ensure that the water flow rate of the first outlet 120 is precisely matched with the water flow rate of the inlet 110. When ensuring that the height of the wastewater level 102 is within the recovery range of the oil recovery structure 400 (preferably the optimal recovery range), the effluent flow rate and the influent flow rate can be kept consistent, or fluctuations within a certain range can be allowed. Such fluctuations can be slightly larger or smaller, periodically slightly larger or smaller, periodically fluctuating between greater and less, or fluctuating over a larger range. The period can be a regular period or an irregular period.

[0114] Understandably, not all wastewater requires treatment by the pH adjustment and dosing device 200. Even if treatment is necessary, pH adjustment and dosing can be performed directly within the catalytic reaction tower 100, or injected directly into the pipeline.

[0115] When the sixth pump 152 and the first switch valve 153 are opened, the wastewater sprayed downwards by the water distributor 900 passes through the heat-conducting pipe, which heats the wastewater. When the wastewater passes through the second aeration disc 330, it mixes with ozone for the first time. When the mixed wastewater passes through the catalyst packing layer 140, the catalyst packing layer 140 adsorbs organic matter and provides active sites for contact with the ozone reaction, ensuring further mineralization of the organic wastewater. After passing through the catalyst packing layer 140, the wastewater passes through the first aeration disc 310, where it mixes with ozone for the second time. After mixing, it is discharged through the first outlet 120 and the seventh connecting pipe 151.

[0116] When the first aeration disc 310 and the second aeration disc 330 are working, they generate dense ozone gas. As the dense ozone gas rises, it carries most of the organic matter (oil) generated during the treatment process upwards, causing it to accumulate on the wastewater surface 102. The ozone gas also causes bubbles to form on the wastewater surface 102. The solution and oil (water-oil mixture) on the wastewater surface 102 are pushed over the overflow port 412 by the bubbles, allowing the water-oil mixture to enter the receiving chamber 411. When the receiving chamber 411 stores a certain amount of water-oil mixture, the first pump 430 starts and the second pump... Pump 451 is turned off, and the water-oil mixture in the accommodating cavity 411 enters the recovery tank 440 through the first connecting pipe 420 and the inlet 441. Since the second pump 451 is turned off, the recovery tank 440 stores the water-oil mixture. When the height of the water-oil mixture reaches the height of the oil outlet 443, the oil above the solution flows out of the recovery tank 440 through the oil outlet 443. After the oil has flowed out, the first pump 430 is turned off, and the second pump 451 is started. The second pump 451 transports the solution in the recovery tank 440 to the catalytic reaction tower 100 to realize the recovery of the solution.

[0117] like Figure 4 As shown, during heating, the seventh pump 503 starts, and distilled water circulates between the MVR distilled water storage tank 600 and the heat pipe. The distilled water in the heat pipe exchanges heat with the wastewater in the catalytic reaction tower 100, thereby heating the wastewater. Unreacted ozone and CO2 generated by mineralization enter the MVR distilled water storage tank 600 through the gas outlet 130, the third connecting pipe 700 and the third aeration plate 710. The distilled water treats the gas discharged from the gas outlet 130.

[0118] like Figure 5 As shown, when the effluent from the catalytic reaction tower 100 does not meet the discharge standards, the sixth pump 152 and the first switch valve 153 are closed, and the wastewater in the catalytic reaction tower 100 cannot be discharged from the first outlet 120 and the seventh connecting pipe 151. The third pump 202, the second switch valve 820, and the fifth pump 810 are started, and the wastewater in the catalytic reaction tower 100 circulates between the catalytic reaction tower 100 and the equalization tank 210 through the sixth connecting pipe 800 and the fourth connecting pipe 201 to circulate and treat the wastewater. When the wastewater meets the discharge standards, the sixth pump 152 and the first switch valve 153 are opened, and the fifth pump 810 and the second switch valve 820 are closed. The wastewater is discharged through the first outlet 120 and the seventh connecting pipe 151.

[0119] When the catalyst packing layer 140 needs to be eluted and regenerated, a strong alkaline solution is added to the dosing tank 220. The strong alkaline solution elutes and regenerates the catalyst packing layer 140. The heating device 500 can heat the strong alkaline solution to accelerate the elution and regeneration of the catalyst packing layer 140.

[0120] By arranging the inlet 110, catalyst packing layer 140, and first outlet 120 at intervals along the vertical direction of the catalytic reaction tower 100, and by positioning the first aeration disc 310 below the catalyst packing layer 140, most of the oil is collected on the wastewater surface 102 by the bubbles generated by the first aeration disc 310 before passing through the catalyst packing layer 140. This prevents oil from adhering to the catalyst surface. Furthermore, an oil recovery structure 400 is provided to recover the water-oil mixture collected on the wastewater surface 102, ensuring the treatment effect of the catalytic reaction tower 100. An overflow component 400 is also included. The 10 and 440 recovery tanks are capable of further processing water-oil mixtures, with oil and solution being output separately and the solution being returned to the catalytic reaction tower 100. The heating device 500 prevents high-salt organic wastewater from crystallizing on the catalyst in the first aeration plate 310, the second aeration plate 330, and the catalyst packing layer 140. The MVR distilled water storage tank 600 allows the distilled water from the subsequent process to heat the heat pipes and treat the exhaust gas discharged from the outlet 130 without the need for an additional ozone destroyer, and the residual exhaust gas can be reused (by treating the organic matter in the distilled water).

[0121] Although the technical solutions of this utility model have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these technical solutions without departing from the principles and spirit of this utility model, the scope of which is defined by the claims and their equivalents.

Claims

1. An ozone catalytic oxidation device characterized by comprising: The application relates to a catalytic reaction tower (100) with a cavity (101) and a liquid inlet (110), a first liquid outlet (120) and a gas outlet (130) in communication with the cavity (101), the gas outlet (130), the liquid inlet (110) and the first liquid outlet (120) being sequentially and spacedly arranged on the catalytic reaction tower (100) from top to bottom, a catalyst packing layer (140) being arranged in the cavity (101) and located between the liquid inlet (110) and the first liquid outlet (120) in the up-down direction, wastewater entering the cavity (101) from the liquid inlet (110) and forming a wastewater liquid level (102); an ozone aeration structure (300) comprising a first aeration disc (310) and an ozone generator (320), the first aeration disc (310) being arranged in the cavity (101) and located below the catalyst packing layer (140), the ozone generator (320) being connected with the first aeration disc (310); and an oil recovery structure (400) capable of collecting water-oil mixture on the wastewater liquid level (102) and discharging the water-oil mixture out of the catalytic reaction tower (100). The oil recovery structure (400) comprises: an overflow member (410) with a containing cavity (411) capable of collecting the water-oil mixture, the overflow member (410) having an overflow port (412) in communication with the containing cavity (411), the overflow port (412) being higher than the wastewater liquid level (102), at least part of the water-oil mixture on the wastewater liquid level (102) being capable of entering the containing cavity (411) through the overflow port (412) under the action of gas sprayed by the first aeration disc (310); a first connecting pipe (420), one end of the first connecting pipe (420) extending into the containing cavity (411), the other end of the first connecting pipe (420) being located outside the catalytic reaction tower (100); and a first pump (430) arranged on the first connecting pipe (420), the first pump (430) being capable of pumping the water-oil mixture in the containing cavity (411) out of the catalytic reaction tower (100) through the first connecting pipe (420). The oil recovery structure (400) further comprises: a recovery tank (440), the upper and lower ends of the recovery tank (440) respectively having an inlet (441) and a water outlet (442), the sidewall of the recovery tank (440) having an oil outlet (443), the inlet (441) being in communication with the other end of the first connecting pipe (420); and a second connecting pipe (450), one end of the second connecting pipe (450) being in communication with the water outlet (442), the other end of the second connecting pipe (450) being in communication with the inside of the cavity (101), a second pump (451) being arranged on the second connecting pipe (450), the second pump (451) being capable of pumping the solution in the recovery tank (440) into the cavity (101) through the second connecting pipe (450). ​ 2. The ozone catalytic oxidation device according to claim 1, characterized in that: ​ ​ ​ ​ 3. The ozone catalytic oxidation device according to claim 2, characterized in that: ​ ​ ​ 4. The ozone catalytic oxidation device according to claim 1, characterized in that: The ozone aeration structure (300) further comprises a second aeration disc (330) installed in the cavity (101), the second aeration disc (330) is located between the liquid inlet (110) and the catalyst filling layer (140), and the second aeration disc (330) is connected with the ozone generator (320).

5. The ozone catalytic oxidation device according to claim 4, characterized in that: The first aeration disc (310) and the second aeration disc (330) both comprise a disc plate (311) and a plurality of micro-porous aeration heads (312) installed on the disc plate (311), and the plurality of micro-porous aeration heads (312) are connected with the ozone generator (320), and each micro-porous aeration head (312) has a jet hole capable of jetting ozone upward.

6. The ozone catalytic oxidation device according to claim 1, characterized in that: Further comprising a heating device (500) installed in the cavity (101), and the heating device (500) is located between the liquid inlet (110) and the catalyst filling layer (140).

7. The ozone catalytic oxidation device according to claim 6, characterized in that: The heating device (500) is a heat conduction pipe; The ozone catalytic oxidation device further comprises an MVR distilled water storage tank (600) located outside the catalytic reaction tower (100), the MVR distilled water storage tank (600) stores distilled water, and the distilled water can be driven to circulate between the MVR distilled water storage tank (600) and the heat conduction pipe.

8. The ozone catalytic oxidation device according to claim 7, characterized in that: Further comprising a third connecting pipe (700), one end of the third connecting pipe (700) is communicated with the gas outlet (130), the other end of the third connecting pipe (700) is located in the MVR distilled water storage tank (600), and the other end of the third connecting pipe (700) is connected with a third aeration disc (710).

9. The ozone catalytic oxidation device according to claim 1, characterized in that: Further comprising a PH adjusting and dosing device (200), the wastewater is conveyed to the liquid inlet (110) after being treated by the PH adjusting and dosing device (200), and the PH adjusting and dosing device (200) comprises: An adjusting tank (210) communicated with the liquid inlet (110) through a fourth connecting pipe (201), a third pump (202) is arranged on the fourth connecting pipe (201), and the third pump (202) can pump the wastewater in the adjusting tank (210) to the liquid inlet (110) through the fourth connecting pipe (201); The medicine injection tank (220) is connected with the fourth connecting pipe (201) through a fifth connecting pipe (203), the fifth connecting pipe (203) is connected with the fourth connecting pipe (201) between the third pump (202) and the liquid inlet (110) on the fourth connecting pipe (201), and the fourth pump (204) is arranged on the fifth connecting pipe (203), so that the fourth pump (204) can pump the liquid in the medicine injection tank (220) to the fourth connecting pipe (201) through the fifth connecting pipe (203).

10. The ozone catalytic oxidation device according to claim 9, characterized in that: The catalytic reaction tower (100) has a second liquid outlet (150) in communication with the inside of the cavity (101), and the ozone catalytic oxidation device further comprises a sixth connecting pipe (800), one end of the sixth connecting pipe (800) is in communication with the second liquid outlet (150), the other end of the sixth connecting pipe (800) is in communication with the adjusting tank (210), and a fifth pump (810) is arranged on the sixth connecting pipe (800), so that the fifth pump (810) can pump the wastewater in the cavity (101) to the adjusting tank (210) through the sixth connecting pipe (800); The first liquid outlet (120) is connected with a seventh connecting pipe (151), a sixth pump (152) and a first switch valve (153) are arranged on the seventh connecting pipe (151), the sixth pump (152) can pump the wastewater in the cavity (101) to the outside of the catalytic reaction tower (100) through the seventh connecting pipe (151), and the sixth pump (152) and the first switch valve (153) are sequentially arranged on the seventh connecting pipe (151) in the water outlet direction of the seventh connecting pipe (151); The ozone catalytic oxidation device further comprises a water distributor (900) for downward water distribution, the water distributor (900) is located in the cavity (101), and the water distributor (900) is in communication with the liquid inlet (110).

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