Wastewater treatment device and system

Abstract

The utility model discloses a waste water treatment device and system, which are applied to the technical field of waste water treatment, and comprise a tank body provided with a first cavity, a second cavity and a third cavity, a catalyst layer is arranged in the second cavity, and an adsorption filler layer is arranged in the third cavity; an ozone generator; an outlet wastewater detector; an inlet of the circulating air pipe is communicated with the top of the third cavity, and an outlet of the circulating air pipe is communicated with the bottom of the third cavity and / or the bottom of the second cavity; and the control system is used for controlling the opening or closing of the first water outlet valve, the second water outlet valve and the third water outlet valve, controlling the opening or closing of the circulating gas pipe, adjusting the generation amount of the ozone generator and / or adjusting the flow of the water inlet valve. According to the wastewater treatment device provided by the utility model, insufficient ozone dosage or waste can be avoided, hardening of the catalyst layer and the adsorption filler layer is avoided, the pollutant removal efficiency is improved, meanwhile, self-cleaning of the adsorption filler is realized, and the service life is prolonged.

Description

A wastewater treatment device and system Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and in particular to a wastewater treatment device and system. Background Technology

[0002] The amount of toxic and recalcitrant substances in wastewater is increasing, making treatment more challenging. Ozone, with its high oxidation-reduction potential (2.07V), allows ozone molecules to directly react with pollutants, oxidizing and degrading them, and is therefore widely used in wastewater treatment. Furthermore, under the action of a catalyst, ozone catalytically decomposes to produce hydroxyl radicals (·OH). These hydroxyl radicals are non-selective, highly oxidizing, and can degrade a variety of pollutants, with a relatively fast reaction rate. However, ozone catalytic oxidation is costly, and the catalyst may caking and deactivate, requiring regular replacement or regeneration. Moreover, for some recalcitrant organic compounds such as perfluorinated compounds and polychlorinated biphenyls (PCBs), ozone oxidation is limited or even ineffective, often requiring combination with other technologies to improve pollutant removal efficiency.

[0003] Wastewater treatment devices in related technologies often involve introducing wastewater into the treatment unit through an inlet pipe. These units are equipped with varying numbers of ozone dosing systems, H2O2 dosing systems, and specific catalyst dosing systems to catalytically degrade pollutants. However, these devices are prone to insufficient or wasted ozone dosage, and catalyst caking during operation can negatively impact treatment efficiency. Furthermore, while ozone can remove pollutants that can be oxidized and degraded, its removal rate for recalcitrant pollutants that ozone cannot oxidize is low. This limits the overall wastewater pollutant removal rate in these technologies and fails to meet market demands.

[0004] Therefore, how to effectively reduce costs and meet the wastewater treatment needs of different pollution levels is a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of this invention is to provide a wastewater treatment device and system that can save costs and improve the removal rate of pollutants from wastewater.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A wastewater treatment device, comprising:

[0008] The tank body has a first cavity, a second cavity, and a third cavity arranged sequentially from bottom to top and connected to each other. The second cavity contains a catalyst layer, and the third cavity contains an adsorption packing layer. The tank body is connected to an inlet pipe for the wastewater to flow into the first cavity, and a first outlet pipe, a second outlet pipe, and a third outlet pipe for the wastewater to flow out of the first cavity, the second cavity, and the third cavity, respectively. The inlet pipe is equipped with an inlet valve, and the first outlet pipe, the second outlet pipe, and the third outlet pipe are respectively equipped with a first outlet valve, a second outlet valve, and a third outlet valve.

[0009] An ozone generator is connected to a microporous air inlet pipe, one end of which is connected to the ozone generator and the other end extends into the tank and is located at the bottom of the first cavity.

[0010] An outlet wastewater detector is used to detect the real-time concentration of pollutants in the wastewater as it flows out of the tank.

[0011] A recirculating air tube, wherein the inlet of the recirculating air tube is connected to the top of the third cavity, and the outlet of the recirculating air tube is connected to the bottom of the third cavity and / or the bottom of the second cavity;

[0012] The control system includes the outlet wastewater detector, the ozone generator, the inlet valve, and the first, second, and third outlet valves, all connected to the control system. The control system is used to control the opening or closing of the first, second, and third outlet valves based on the real-time pollutant concentration of the effluent wastewater, control the opening or closing of the circulating gas pipe, adjust the generation rate of the ozone generator, and / or adjust the flow rate of the inlet valve.

[0013] On the other hand, a gas circulation pump and a gas circulation valve are installed on the circulating gas pipe, and the circulating gas pipe valve is located on the side of the gas circulation pump near the inlet of the circulating gas pipe.

[0014] The gas circulation pump and the circulating gas pipe valve are both connected to the control system. The control system is also used to control the opening or closing of the gas circulation pump and the circulating gas pipe valve according to the real-time pollutant concentration of the outflowing wastewater.

[0015] On the other hand, the outlet of the circulating gas pipe is connected to an adsorption aeration pipe and a catalyst aeration pipe. The adsorption aeration pipe is equipped with an adsorption aeration pipe valve, and the catalyst aeration pipe is equipped with a catalyst aeration pipe valve.

[0016] Both the adsorption aeration pipe valve and the catalyst aeration pipe valve are connected to the control system. The control system is also used to control the opening degree of the adsorption aeration pipe valve and the catalyst aeration pipe valve according to the real-time pollutant concentration of the effluent wastewater.

[0017] On the other hand, it also includes an exhaust gas collection and destruction device, which is connected to the top of the tank through a pipe; the exhaust gas collection and destruction device is connected to the control system, which is used to control the opening or closing of the exhaust gas collection and destruction device.

[0018] On the other hand, it also includes an inlet wastewater detector, which is installed on the inlet pipe to detect the real-time concentration of pollutants in the wastewater as it flows into the tank.

[0019] The inlet wastewater detector is connected to the control system. The control system is also used to calculate the real-time pollutant removal rate based on the real-time inflow wastewater pollutant concentration and the real-time outflow wastewater pollutant concentration, and based on the real-time pollutant removal rate, control the opening or closing of the first outlet valve, the second outlet valve, and the third outlet valve, control the opening or closing of the circulating air pipe, adjust the generation of the ozone generator, and / or adjust the flow rate of the inlet valve.

[0020] On the other hand, a microporous air inlet valve is installed on the microporous air inlet pipe. The microporous air inlet valve is connected to the control system. The control system is used to control the opening or closing of the microporous air inlet valve, and also to control the opening degree of the microporous air inlet valve and / or adjust the flow rate of the inlet valve according to the real-time wastewater inflow concentration.

[0021] On the other hand, a first gas flow meter is also installed on the microporous air inlet pipe. The first gas flow meter is connected to the control system. The control system is used to obtain the detection result of the first gas flow meter and to determine whether the opening of the microporous air inlet pipe valve is adjusted properly based on the detection result of the first gas flow meter.

[0022] On the other hand, it also includes a main outlet pipe, wherein the first outlet pipe, the second outlet pipe and the third outlet pipe are all connected to the main outlet pipe, and one of the first outlet pipe, the second outlet pipe and the third outlet pipe is connected to the main outlet pipe; the outlet wastewater detector is installed at the end of the main outlet pipe away from the tank body.

[0023] On the other hand, the outlet of the circulating gas pipe is connected to an adsorption aeration pipe and a catalyst aeration pipe. The adsorption aeration pipe is equipped with an adsorption aeration pipe valve, and the catalyst aeration pipe is equipped with a catalyst aeration pipe valve. The control system is also used to control the opening or closing of the gas circulation pump and the circulating gas pipe valve according to the real-time pollutant concentration of the outflowing wastewater.

[0024] In the initial state, the control system controls the first effluent valve to open, controls the second effluent valve and the third effluent valve to close, obtains the real-time effluent wastewater pollutant concentration, and enters the ozone catalytic oxidation state when the real-time effluent wastewater pollutant concentration is ≤ the target effluent wastewater pollutant concentration.

[0025] Under ozone catalytic oxidation, the control system controls the first and third effluent valves to close and the second effluent valve to open, obtains the real-time effluent pollutant concentration, and enters the adsorption state when the real-time effluent pollutant concentration is less than or equal to the target effluent pollutant concentration.

[0026] In the adsorption state, the control system controls the first and second effluent valves to close and the third effluent valve to open, obtains the real-time effluent pollutant concentration, and enters the fine-tuning state when the real-time effluent pollutant concentration is less than or equal to the target effluent pollutant concentration.

[0027] In the fine-tuning state, when the difference between the real-time effluent pollutant concentration and the target effluent pollutant concentration is less than or equal to a first difference, the opening of the catalyst aeration pipe valve is increased, and the opening of the adsorption aeration pipe valve is decreased.

[0028] The wastewater treatment device provided by this utility model includes: a tank body, having a first cavity, a second cavity, and a third cavity arranged sequentially from bottom to top and connected to each other; a catalyst layer is provided in the second cavity, and an adsorption packing layer is provided in the third cavity; an inlet pipe for the wastewater to flow into the first cavity is connected to the tank body, and a first outlet pipe, a second outlet pipe, and a third outlet pipe for the wastewater to flow out of the first cavity, the second cavity, and the third cavity, respectively; an inlet valve is provided on the inlet pipe, and a first outlet valve, a second outlet valve, and a third outlet valve are provided on the first outlet pipe, the second outlet pipe, and the third outlet pipe, respectively; and an ozone generator connected to a microporous air inlet pipe, one end of which is connected to the ozone generator, and the other end extends into the tank body and is located at the bottom of the first cavity; An outlet wastewater detector, installed on the tank, is used to detect the real-time concentration of pollutants in the wastewater as it flows out of the tank. A circulating air pipe has its inlet connected to the top of the third cavity and its outlet connected to the bottom of the third cavity and / or the bottom of the second cavity. A control system is connected to the outlet wastewater detector, the ozone generator, the inlet valve, and the first, second, and third outlet valves. The control system controls the opening and closing of the first, second, and third outlet valves based on the real-time concentration of pollutants in the effluent, controls the opening and closing of the circulating air pipe, adjusts the ozone generator's output, and / or adjusts the flow rate of the inlet valve. The wastewater treatment device provided by this utility model, by acquiring the real-time pollutant concentration of the effluent wastewater, can specifically adjust the generation rate of the ozone generator, or adjust the flow rate of the inlet valve, or activate the ozone catalysis or adsorption function according to the actual degree of pollutant removal in the wastewater. This enables automatic adjustment of wastewater pollutants and effectively avoids insufficient or wasted ozone dosage, thus significantly saving operating costs. At the same time, the setting of the circulating gas pipe can further improve the utilization rate of ozone, avoid the caking of the catalyst layer and adsorption packing layer, improve the pollutant removal efficiency in wastewater, and achieve self-cleaning of the adsorption packing, extending its service life.

[0029] In one embodiment, an inlet wastewater detector is further included, installed on the inlet pipe, for detecting the real-time inflow wastewater pollutant concentration as the wastewater flows into the tank. The inlet wastewater detector is connected to the control system, which is also used to calculate the real-time pollutant removal rate based on the real-time inflow and outflow wastewater pollutant concentrations; and, based on the real-time pollutant removal rate, to control the opening or closing of the first, second, and third outlet valves, the opening or closing of the circulating air pipe, the generation rate of the ozone generator, and / or the flow rate of the inlet valve. This configuration, by obtaining the real-time inflow wastewater pollutant concentration as the wastewater flows into the tank and judging the real-time pollutant removal rate, allows for a more accurate assessment of the device's pollutant treatment capacity, enabling more precise adjustments to the ozone generator's generation rate, the flow rate of the inlet valve, or the activation of ozone catalysis or adsorption functions, thereby further reducing costs and improving efficiency. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this utility model or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 is a structural schematic diagram of a specific embodiment of the wastewater treatment device provided by this utility model;

[0032] Figure 2 is a schematic diagram of the control method of the control system in the wastewater treatment device provided by this utility model.

[0033] Figure label:

[0034] 100-Control system; 1-Tank body; 1-1-First cavity; 1-2-Second cavity; 1-3-Third cavity; 2-Microporous air inlet pipe; 3-Water inlet pipe; 4-Ozone generator; 5-Catalyst layer; 6-Catalyst aeration pipe; 7-Adsorption packing layer; 8-Adsorption aeration pipe; 9-Circulating gas pipe; 10-Circulating gas pipe valve; 11-Gas circulation pump; 12-Catalyst aeration pipe valve; 13-Gas flow meter; 14-Adsorption aeration pipe valve; 15-First water outlet pipe; 16-First water outlet valve; 17-Second water outlet pipe; 18-Second water outlet valve; 19-Third water outlet pipe; 20-Third water outlet valve; 21-Main water outlet pipe; 22-Tail gas collection and destruction device; 23-Microporous air inlet pipe valve; 24-1-Outlet wastewater detector; 24-2-Inlet wastewater detector. Detailed Implementation

[0035] The core of this utility model is to provide a wastewater treatment device and system that can improve ozone utilization and achieve automated regulation.

[0036] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] Please refer to Figures 1 and 2. Figure 1 is a structural schematic diagram of a specific embodiment of the wastewater treatment device provided by this utility model; Figure 2 is a schematic diagram of the control method of the control system in the wastewater treatment device provided by this utility model.

[0038] In this embodiment, the wastewater treatment device includes:

[0039] Tank 1 has a first cavity 1-1, a second cavity 1-2, and a third cavity 1-3 arranged sequentially from bottom to top and connected to each other. The second cavity 1-2 is provided with a catalyst layer 5, and the third cavity 1-3 is provided with an adsorption packing layer 7. Tank 1 is connected to an inlet pipe 3 for wastewater to flow into the first cavity 1-1, and a first outlet pipe 15, a second outlet pipe 17, and a third outlet pipe 19 for wastewater to flow out of the first cavity 1-1, the second cavity 1-2, and the third cavity 1-3, respectively. The inlet pipe 3 is provided with an inlet valve, and the first outlet pipe 15, the second outlet pipe 17, and the third outlet pipe 19 are provided with a first outlet valve 16, a second outlet valve 18, and a third outlet valve 20, respectively.

[0040] Ozone generator 4 is connected to a microporous air inlet pipe 2. One end of the microporous air inlet pipe 2 is connected to the ozone generator 4, and the other end extends into the tank 1 and is located at the bottom of the first cavity 1-1, for supplying ozone gas into the tank 1.

[0041] The outlet wastewater detector 24-1 is used to detect the real-time concentration of pollutants in the wastewater when it flows out of the tank 1. Specifically, the outlet wastewater detector 24-1 can be installed on the first outlet pipe 15, the second outlet pipe 17 and the third outlet pipe 19 respectively, or the outlet wastewater detector 24-1 can be installed on the outlet main pipe 21.

[0042] The recirculating air tube 9 has its inlet connected to the top of the third cavity 1-3 and its outlet connected to the bottom of the third cavity 1-3 and / or the bottom of the second cavity 1-2.

[0043] The control system 100, wastewater detector, ozone generator 4, inlet valve, and first outlet valve 16, second outlet valve 18 and third outlet valve 20 are all connected to the control system 100. The control system 100 is used to control the opening or closing of the first outlet valve 16, second outlet valve 18 and third outlet valve 20 according to the real-time pollutant concentration of the outflowing wastewater, control the opening or closing of the circulating air pipe 9, adjust the generation of ozone generator 4, and / or adjust the flow rate of the inlet valve.

[0044] Of course, the control system 100 can also obtain the pollutant concentration of the inflow wastewater, calculate the real-time pollutant removal rate based on the real-time pollutant concentration of the outflow wastewater and the pollutant concentration of the inflow wastewater, and control the opening or closing of the first outlet valve 16, the second outlet valve 18 and the third outlet valve 20, control the opening or closing of the circulating air pipe 9, adjust the generation of ozone generator 4, and / or adjust the flow rate of the inflow valve according to the magnitude of the real-time pollutant removal rate; that is, the judgment of the control system 100 can be based on the difference between the real-time outflow wastewater pollutant concentration and the target outflow wastewater pollutant concentration, or on the difference between the real-time pollutant removal rate and the target pollutant removal rate.

[0045] Specifically, pollutant concentration can be a comprehensive wastewater evaluation index such as COD or TOC, or it can be the concentration of a specific pollutant. COD represents the amount of oxygen consumed by reducing substances in a water sample that can be oxidized by strong oxidants under certain conditions. TOC represents the total amount of carbon in dissolved and suspended organic matter in a water sample, expressed as the mass concentration of carbon, which directly reflects the comprehensive carbon content of organic matter.

[0046] Specifically, the wastewater treatment device comprises a first cavity 1-1, a second cavity 1-2, and a third cavity 1-3. The second cavity 1-2 contains a catalyst layer 5, and the third cavity 1-3 contains an adsorption packing layer 7. When direct ozone oxidation is sufficient, only the first outlet valve 16 needs to be opened, and the second outlet valve 18 and the third outlet valve 20 need to be closed. Wastewater enters the tank 1 through the inlet pipe 3, passes through the first cavity 1-1, and exits the tank 1 through the first outlet pipe 15. When direct ozone oxidation is insufficient, ozone catalytic oxidation is added. In this case, only... Open the second outlet valve 18 and close the first outlet valve 16 and the third outlet valve 20. Wastewater enters the tank 1 through the inlet pipe 3, passes through the first cavity 1-1 and the second cavity 1-2, and is discharged from the tank 1 through the second outlet pipe 17. When ozone catalytic oxidation cannot meet the requirements, the adsorption function is added. At this time, simply open the third outlet valve 20 and close the first outlet valve 16 and the second outlet valve 18. Wastewater enters the tank 1 through the inlet pipe 3, passes through the first cavity 1-1, the second cavity 1-2 and the third cavity 1-3, and is discharged from the tank 1 through the third outlet pipe 19.

[0047] The above three methods can be switched at any time according to the fluctuations in the real-time effluent pollutant concentration. The control system 100 can adjust the start and stop states of the first effluent valve 16, the second effluent valve 18, and the third effluent valve 20 at any time, thereby meeting the wastewater treatment needs under different application scenarios. Specifically, when the ozone catalytic oxidation function is turned on, if the difference between the real-time effluent pollutant concentration and the target effluent pollutant concentration is detected to be greater than or equal to the first target difference, then the second effluent valve 18 and the third effluent valve 20 are closed, and the first effluent valve 16 is reopened to re-enter the ozone direct oxidation process. The ozone catalytic oxidation function is activated when the adsorption function is turned on. If the difference between the real-time effluent pollutant concentration and the target effluent pollutant concentration is greater than or equal to the second target difference, the third effluent valve 20 and the first effluent valve 16 are closed, and the second effluent valve 18 is reopened to activate the ozone catalytic oxidation function. If the difference between the real-time effluent pollutant concentration and the target effluent pollutant concentration is greater than or equal to the third target difference, the third effluent valve 20 and the second effluent valve 18 are closed, and the first effluent valve 16 is reopened to re-enter the ozone direct oxidation function.

[0048] Furthermore, the first outlet pipe 15, the second outlet pipe 17, and the third outlet pipe 19 are respectively connected to the top of the first cavity 1-1, the second cavity 1-2, and the third cavity 1-3, thereby ensuring that the wastewater can come into more full contact with ozone, the ozone oxidation layer, and / or the adsorption packing layer 7, and improving the pollutant removal efficiency.

[0049] Furthermore, by setting up the recirculation pipe 9, ozone is sent back to the second cavity 1-2 and the third cavity 1-3, improving the utilization rate. At the same time, the concentration of pollutants in the outflowing wastewater can be fine-tuned by adjusting the ratio of ozone sent back to the second cavity 1-2 and the third cavity 1-3, without having to adjust the generation rate of the ozone generator 4 or the flow rate of the inlet pipe 3, thus further facilitating operation and saving costs.

[0050] The wastewater treatment device provided by this utility model, by acquiring the real-time concentration of pollutants in the effluent wastewater, can specifically adjust the generation rate of the ozone generator 4, or adjust the flow rate of the inlet valve, or activate the ozone catalysis or adsorption function according to the actual degree of pollutant removal in the wastewater. This enables automatic adjustment of wastewater pollutants and effectively avoids insufficient or wasted ozone dosage, thus significantly saving operating costs. At the same time, the setting of the circulating air pipe 9 can further improve the utilization rate of ozone, prevent the catalyst layer 5 and the adsorption packing layer 7 from caking, improve the pollutant removal efficiency in wastewater, and achieve self-cleaning of the adsorption packing, extending its service life.

[0051] In some embodiments, a gas circulation pump 11 and a gas circulation valve 10 are installed on the circulating gas pipe 9. The circulating gas pipe valve 10 is located on the side of the gas circulation pump 11 near the inlet of the circulating gas pipe 9. Both the gas circulation pump 11 and the circulating gas pipe valve 10 are connected to the control system 100. The control system 100 is also used to control the opening or closing of the gas circulation pump 11 and the circulating gas pipe valve 10 according to the real-time concentration of pollutants in the outflowing wastewater. Specifically, the gas circulation pump 11 can provide power for the airflow in the circulating gas pipe 9. The setting of the circulating gas pipe valve 10 can prevent ozone in the tank 1 from corroding the gas circulation pump 11. When the ozone catalytic oxidation function and adsorption function do not need to be activated, the circulating gas pipe valve 10 can remain closed.

[0052] In some embodiments, the outlet of the circulating air pipe 9 is connected to an adsorption aeration pipe 8 and a catalyst aeration pipe 6. The adsorption aeration pipe 8 extends to the inner bottom of the third cavity 1-3, and the catalyst aeration pipe 6 extends to the inner bottom of the second cavity 1-2. The adsorption aeration pipe 8 is provided with an adsorption aeration pipe valve 14, and the catalyst aeration pipe 6 is provided with a catalyst aeration pipe valve 12. Both the adsorption aeration pipe 8 and the catalyst aeration pipe 6 are microporous aeration pipes.

[0053] Both the adsorption aeration pipe valve 14 and the catalyst aeration pipe valve 12 are connected to the control system 100. The control system 100 is also used to control the opening degree of the adsorption aeration pipe valve 14 and the catalyst aeration pipe valve 12 according to the real-time pollutant concentration of the effluent. Specifically, one of the adsorption aeration pipe valve 14 and the catalyst aeration pipe valve 12 can be opened. For example, when the ozone catalytic oxidation function is started, the control system 100 starts the gas circulation pump 11, opens the circulation gas pipe valve 10 and the catalyst aeration pipe valve 12, closes the adsorption aeration pipe valve 14, and starts the gas circulation pump 11 to return the unreacted ozone to the tank 1 for reuse. At the same time, the circulating gas has a flushing effect on the catalyst layer 5 to prevent the catalyst layer 5 from caking and affecting the wastewater treatment effect. When the adsorption function is started, the control system 100 starts the gas circulation system to... Open the circulating gas pipe valve 10 and close the catalyst aeration pipe valve 12. Start the gas circulation pump 11 to return the unreacted ozone to the tank 1 for reuse. The circulating gas has a flushing effect on the adsorption packing layer 7, preventing the adsorption packing layer 7 from caking. At the same time, the ozone reacts with the pollutants adsorbed by the adsorption packing, playing a role in self-cleaning and regenerating the adsorption packing. Alternatively, when the adsorption function is started, the adsorption aeration pipe valve 14 and the catalyst aeration pipe valve 12 can also be opened at the same time to improve the interaction between ozone and the catalyst layer 5, further improving the pollutant removal effect.

[0054] In some embodiments, an exhaust gas collection and destruction device 22 is also included, which is connected to the top of the tank 1 via a pipe. The exhaust gas collection and destruction device 22 is connected to the control system 100, which controls the opening or closing of the exhaust gas collection and destruction device 22 to prevent exhaust gas from harming the environment.

[0055] In some embodiments, an inlet wastewater detector 24-2 is also included, installed on the inlet pipe 3, for detecting the real-time inflow wastewater pollutant concentration when the wastewater flows into the tank 1. The inlet wastewater detector 24-2 is connected to the control system 100, which is also used to calculate the real-time pollutant removal rate based on the real-time inflow and outflow wastewater pollutant concentrations. Based on the real-time pollutant removal rate, the control system controls the opening or closing of the first outlet valve 16, the second outlet valve 18, and the third outlet valve 20, controls the opening or closing of the circulating air pipe 9, adjusts the generation rate of the ozone generator 4, and / or adjusts the flow rate of the inlet valve. This configuration, by obtaining the real-time inflow wastewater pollutant concentration when the wastewater flows into the tank 1 and judging the real-time pollutant removal rate, allows for a more accurate assessment of the device's pollutant treatment capacity, enabling more precise adjustments to the generation rate of the ozone generator 4, or the flow rate of the inlet valve, or the activation of the ozone catalytic or adsorption function, further reducing costs and improving efficiency.

[0056] Of course, the concentration of pollutants in the influent can be obtained in real time, or it can be input into the control system 100 according to the wastewater environment at the construction site. For scenarios where the concentration of pollutants in the wastewater changes significantly, it is suitable to add an inlet wastewater detector 24-2 to the inlet pipe 3. For scenarios where the concentration of pollutants in the wastewater changes little, the placement of the inlet wastewater detector 24-2 can be saved.

[0057] In some embodiments, a microporous air inlet valve 23 is installed on the microporous air inlet pipe 2. The microporous air inlet valve 23 is connected to the control system 100. The control system 100 is used to control the opening or closing of the microporous air inlet valve 23, and also to control the opening degree of the microporous air inlet valve 23 and / or adjust the flow rate of the inlet valve according to the real-time concentration of pollutants flowing into the wastewater. Specifically, the control system 100 can fine-tune the flow rate of ozone entering the tank 1 by adjusting the opening degree of the microporous air inlet valve 23 without adjusting the generation rate of the ozone generator 4.

[0058] It should be noted that when the real-time effluent pollutant concentration cannot meet the requirements, the first step should be to adjust the flow rate by increasing the output of ozone generator 4 and / or reducing the flow rate of the inlet valve. If the real-time effluent pollutant concentration still cannot meet the requirements, the ozone catalytic oxidation function, or the ozone catalytic oxidation function plus the adsorption function, should be activated.

[0059] In some embodiments, a first gas flow meter 13 is also installed on the microporous air inlet pipe 2. The first gas flow meter 13 is connected to the control system 100. The control system 100 is used to acquire the detection result of the first gas flow meter 13 and to determine whether the opening degree of the microporous air inlet pipe valve 23 is adjusted properly, thus achieving a good feedback effect. Furthermore, a second gas flow meter 13 and a third gas flow meter 13 are respectively installed on the adsorption aeration pipe 8 and the catalyst aeration pipe 6. The gas flow meters 13 are connected to the control system 100. The control system 100 is used to acquire the detection result of the gas flow meters 13 and to determine whether the opening degree of the adsorption aeration pipe valve 14 and the catalyst aeration pipe valve 12 is adjusted properly.

[0060] In some embodiments, a main outlet pipe 21 is also included, with the first outlet pipe 15, the second outlet pipe 17, and the third outlet pipe 19 all connected to the main outlet pipe 21, and one of the first outlet pipe 15, the second outlet pipe 17, and the third outlet pipe 19 being connected to the main outlet pipe 21. The outlet wastewater detector 24-1 is installed at the end of the main outlet pipe 21 away from the tank body 1 for easy arrangement; or, an outlet wastewater detector 24-1 can be installed on the first outlet pipe 15, the second outlet pipe 17, and the third outlet pipe 19 respectively, as long as the usage requirements are met.

[0061] In some embodiments, the outlet of the circulating air pipe 9 is connected to an adsorption aeration pipe 8 and a catalyst aeration pipe 6. The adsorption aeration pipe 8 is provided with an adsorption aeration pipe valve 14, and the catalyst aeration pipe 6 is provided with a catalyst aeration pipe valve 12. The control system 100 is also used to control the opening or closing of the gas circulation pump 11 and the circulating air pipe valve 10 according to the real-time pollutant concentration of the outflowing wastewater.

[0062] In the initial state, the control system 100 controls the first outlet valve 16 to open and controls the second outlet valve 18 and the third outlet valve 20 to close, obtains the real-time concentration of pollutants in the outflowing wastewater, and enters the ozone catalytic oxidation state when the real-time concentration of pollutants in the outflowing wastewater is less than or equal to the target concentration of pollutants in the outflowing wastewater.

[0063] Under ozone catalytic oxidation, the control system 100 controls the first outlet valve 16 and the third outlet valve 20 to close, controls the second outlet valve 18 to open, obtains the real-time concentration of pollutants in the outflowing wastewater, and enters the adsorption state when the real-time concentration of pollutants in the outflowing wastewater is less than or equal to the target concentration of pollutants in the outflowing wastewater.

[0064] In the adsorption state, the control system 100 controls the first outlet valve 16 and the second outlet valve 18 to close, and controls the third outlet valve 20 to open, to obtain the real-time pollutant concentration of the outflowing wastewater, and enters the fine-tuning state when the real-time outflowing wastewater pollutant concentration is ≤ the target outflowing wastewater pollutant concentration.

[0065] In the fine-tuning state, when the difference between the real-time effluent pollutant concentration and the target effluent pollutant concentration is less than or equal to the first difference, the opening of the catalyst aeration pipe valve 12 is increased and the opening of the adsorption aeration pipe valve 14 is decreased; specifically, the first difference divided by the target effluent pollutant concentration is less than or equal to 10%.

[0066] Of course, when the difference between the real-time effluent pollutant concentration and the target effluent pollutant concentration is greater than the first difference, it is still necessary to control the flow rate of the inlet valve to decrease, or control the generation of ozone generator 4 to increase, or simultaneously control the flow rate of the inlet valve to decrease and the generation of ozone generator 4 to increase. Since the pollutant removal effect of ozone catalytic oxidation is better than that of adsorption, the target effluent pollutant concentration can be fine-tuned by increasing the opening of catalyst aeration pipe valve 12. Of course, the ozone flow rate returning to the third cavity 1-3 should not be too small, otherwise it will not be able to play the role of self-cleaning and regenerating the adsorption packing. It should be noted that before entering the fine-tuning state, the opening of catalyst aeration pipe valve 12 and adsorption aeration pipe valve 14 can be at their maximum, and the ozone gas is freely distributed back to the second cavity 1-2 and the third cavity 1-3 through the circulation pipe 9.

[0067] The above settings provide the judgment criteria and control methods of the control system 100 under several different states, which can maximize the utilization rate of ozone while simplifying the operation process and meeting the needs of use.

[0068] Example 1:

[0069] Wastewater enters tank 1 through inlet pipe 3. The microporous air inlet valve 23 and outlet valve are opened, while the circulating air valve 10, catalyst aeration valve 12, adsorption aeration valve 14, second outlet valve 18, and third outlet valve 20 are closed. The ozone generator 4 is then turned on to directly oxidize the wastewater with ozone. The treated wastewater is discharged from the first outlet pipe 15 into the main outlet pipe 21. The inlet wastewater detector 24-2 and outlet wastewater detector 24-1 monitor the concentration of target pollutants in the inlet and outlet water in real time. The control system 100 has a target pollutant removal rate. The real-time pollutant removal rate is calculated based on the measured concentrations of target pollutants in the inlet and outlet water. If the real-time pollutant removal rate is greater than the set target pollutant removal rate, or if the real-time outflow wastewater pollutant concentration is less than or equal to the target outflow wastewater pollutant concentration, the control system 100 adjusts to reduce the generation rate of the ozone generator 4 or increase the inlet flow rate to improve ozone utilization.

[0070] Example 2:

[0071] The difference from Example 1 is that after the control system 100 adjusts the generation rate of ozone generator 4 or the influent flow rate, the real-time pollutant removal rate of wastewater treated by direct ozone oxidation is still less than the set target pollutant removal rate. At this time, the control system 100 starts the ozone catalytic oxidation function and the gas circulation system, opens the second outlet valve 18, the circulating gas pipe valve 10 and the catalyst aeration pipe valve 12, starts the gas circulation pump 11, closes the first outlet valve 16, and the wastewater overflows the catalyst layer 5. The wastewater after ozone catalytic oxidation is discharged from the second outlet pipe 17 into the main effluent system. Pipe 21, the control system 100 calculates the real-time pollutant removal rate based on the real-time monitoring of the target pollutant concentration in the influent and effluent. If the real-time pollutant removal rate is greater than the set target pollutant removal rate, or if the real-time effluent pollutant concentration is less than or equal to the target effluent pollutant concentration, the control system 100 adjusts to reduce the generation of ozone generator 4 or increase the influent flow rate to improve ozone utilization. The gas circulation pump 11 pumps the unreacted ozone back to tank 1 for reuse. At the same time, the circulating gas flushes the catalyst to prevent the catalyst layer 5 from caking and improves the pollutant removal efficiency.

[0072] Example 3:

[0073] The difference from Examples 1 and 2 is that after the control system 100 adjusts the generation rate of ozone generator 4 or the influent flow rate, the real-time pollutant removal rates of ozone direct oxidation and catalytic oxidation of wastewater are both less than the set target pollutant removal rate. At this time, the control system 100 starts the adsorption system and the gas circulation system, opens the third outlet valve 20, the circulating gas pipe valve 10, and the adsorption aeration pipe valve 14, starts the gas circulation pump 11, closes the first outlet valve 16 and the second outlet valve 18, and the wastewater overflows the adsorption packing layer 7. The wastewater adsorbed by the packing is discharged from the third outlet pipe 19 into the main outlet pipe 21. The control system 100... The real-time pollutant removal rate is calculated based on the target pollutant concentrations in the influent and effluent. If the real-time pollutant removal rate is greater than the set target pollutant removal rate, or if the real-time effluent pollutant concentration is less than or equal to the target effluent pollutant concentration, the control system 100 adjusts to reduce the generation of ozone generator 4 or increase the influent flow rate to improve ozone utilization. The gas circulation pump 11 returns the unreacted ozone to the tank 1 for reuse. The circulating gas flushes the adsorption packing to prevent the adsorption packing layer 7 from caking. At the same time, it reacts with the pollutants adsorbed by the packing to achieve self-cleaning of the packing, extend the service life of the packing, and reduce operating costs.

[0074] Example 4:

[0075] The difference from Example 3 is that after the control system 100 starts the adsorption system and the gas circulation system, the real-time pollutant removal rate of the wastewater is less than the set target pollutant removal rate, or when the real-time outflow wastewater pollutant concentration is less than or equal to the target outflow wastewater pollutant concentration, and the difference between the real-time outflow wastewater pollutant concentration and the target outflow wastewater pollutant concentration is less than or equal to the first difference, the system enters the fine-tuning state, controls the opening of the catalyst aeration pipe valve 12 to increase, and controls the opening of the adsorption aeration pipe valve 14 to decrease.

[0076] This wastewater treatment device determines whether to adjust the ozone generator 4's output or influent flow rate based on the real-time removal rate of the target pollutants, avoiding insufficient or wasted ozone dosage and saving operating costs. By controlling the start and stop of the ozone catalytic oxidation and adsorption functions, it achieves enhanced removal of recalcitrant substances from wastewater through direct ozone oxidation and catalytic oxidation, respectively, and can handle wastewater with significant quality fluctuations. The gas circulation system further improves ozone utilization, and gas flushing prevents caking of the catalyst layer 5 and adsorption packing layer 7, improving removal efficiency. It also enables self-cleaning of the adsorption packing, extending its service life and reducing operating costs. Integrating multiple wastewater treatment systems into one compact device, it is easy to operate, facilitating design scaling and engineering applications.

[0077] The wastewater treatment device and system provided by this utility model have been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of this utility model.

Claims

1. A wastewater treatment device, characterized in that, include: The tank (1) has a first cavity (1-1), a second cavity (1-2), and a third cavity (1-3) arranged sequentially from bottom to top and connected to each other. The second cavity (1-2) is provided with a catalyst layer (5), and the third cavity (1-3) is provided with an adsorption packing layer (7). The tank (1) is connected to an inlet pipe (3) for the wastewater to flow into the first cavity (1-1), and a first outlet pipe (15) for the wastewater to flow out from the first cavity (1-1), the second cavity (1-2), and the third cavity (1-3), respectively. The first water outlet pipe (15), the second water outlet pipe (17), and the third water outlet pipe (19) are provided with water inlet valves, and the first water outlet pipe (15), the second water outlet pipe (17), and the third water outlet pipe (19) are respectively provided with first water outlet valve (16), second water outlet valve (18), and third water outlet valve (20); the ozone generator (4) is connected to a microporous air inlet pipe (2), one end of the microporous air inlet pipe (2) is connected to the ozone generator (4), and the other end extends into the tank (1) and is located at the bottom of the first cavity (1-1); An outlet wastewater detector (24-1) is used to detect the real-time concentration of pollutants in the wastewater as it flows out of the tank (1); a circulating air pipe (9) is connected to the top of the third cavity (1-3) at its inlet and to the bottom of the third cavity (1-3) and / or the bottom of the second cavity (1-2) at its outlet; a control system (100) is configured to include the outlet wastewater detector (24-1), the ozone generator (4), the inlet valve, and the... The first outlet valve (16), the second outlet valve (18), and the third outlet valve (20) are all connected to the control system (100). The control system (100) is used to control the opening or closing of the first outlet valve (16), the second outlet valve (18), and the third outlet valve (20) according to the real-time pollutant concentration of the outflowing wastewater, control the opening or closing of the circulating air pipe (9), adjust the generation of the ozone generator (4), and / or adjust the flow rate of the inlet valve.

2. The wastewater treatment device according to claim 1, characterized in that, A gas circulation pump (11) and a gas circulation valve (10) are installed on the circulating gas pipe (9). The gas circulation valve (10) is located on the side of the gas circulation pump (11) near the inlet of the circulating gas pipe (9). The gas circulation pump (11) and the gas circulation valve (10) are both connected to the control system (100). The control system (100) is also used to control the opening or closing of the gas circulation pump (11) and the gas circulation valve (10) according to the real-time pollutant concentration of the outflowing wastewater.

3. The wastewater treatment device according to claim 2, characterized in that, The outlet of the circulating air pipe (9) is connected to an adsorption aeration pipe (8) and a catalyst aeration pipe (6). The adsorption aeration pipe (8) is equipped with an adsorption aeration pipe valve (14), and the catalyst aeration pipe (6) is equipped with a catalyst aeration pipe valve (12). Both the adsorption aeration pipe valve (14) and the catalyst aeration pipe valve (12) are connected to the control system (100). The control system (100) is also used to control the opening degree of the adsorption aeration pipe valve (14) and the catalyst aeration pipe valve (12) according to the real-time pollutant concentration of the outflowing wastewater.

4. The wastewater treatment device according to claim 1, characterized in that, It also includes an exhaust gas collection and destruction device (22), which is connected to the top of the tank (1) via a pipe; the exhaust gas collection and destruction device (22) is connected to the control system (100), which is used to control the opening or closing of the exhaust gas collection and destruction device (22).

5. The wastewater treatment apparatus according to any one of claims 1 to 4, characterized in that, It also includes an inlet wastewater detector (24-2), which is installed on the inlet pipe (3) to detect the real-time inflow wastewater pollutant concentration when the wastewater flows into the tank (1); the inlet wastewater detector (24-2) is connected to the control system (100), and the control system (100) is also used to calculate the real-time pollutant removal rate based on the real-time inflow wastewater pollutant concentration and the real-time outflow wastewater pollutant concentration, and based on the real-time pollutant removal rate, control the opening or closing of the first outlet valve (16), the second outlet valve (18) and the third outlet valve (20), control the opening or closing of the circulating air pipe (9), adjust the generation of the ozone generator (4), and / or adjust the flow rate of the inlet valve.

6. The wastewater treatment apparatus according to claim 5, characterized in that, A microporous air inlet valve (23) is installed on the microporous air inlet pipe (2). The microporous air inlet valve (23) is connected to the control system (100). The control system (100) is used to control the opening or closing of the microporous air inlet valve (23), and is also used to control the opening degree of the microporous air inlet valve (23) and / or adjust the flow rate of the water inlet valve according to the real-time wastewater inflow concentration.

7. The wastewater treatment apparatus according to claim 6, characterized in that, A first gas flow meter (13) is also installed on the microporous air inlet pipe (2). The first gas flow meter (13) is connected to the control system (100). The control system (100) is used to obtain the detection result of the first gas flow meter (13) and use the detection result of the first gas flow meter (13) to determine whether the opening of the microporous air inlet pipe valve (23) is adjusted in place.

8. The wastewater treatment apparatus according to claim 2 or 3, characterized in that, It also includes a main outlet pipe (21), the first outlet pipe (15), the second outlet pipe (17) and the third outlet pipe (19) are all connected to the main outlet pipe (21), and one of the first outlet pipe (15), the second outlet pipe (17) and the third outlet pipe (19) is connected to the main outlet pipe (21); the outlet wastewater detector (24-1) is installed at the end of the main outlet pipe (21) away from the tank body (1).

9. The wastewater treatment apparatus according to claim 8, characterized in that, The outlet of the circulating air pipe (9) is connected to an adsorption aeration pipe (8) and a catalyst aeration pipe (6). The adsorption aeration pipe (8) is equipped with an adsorption aeration pipe valve (14), and the catalyst aeration pipe (6) is equipped with a catalyst aeration pipe valve (12). The control system (100) is also used to control the opening or closing of the gas circulation pump (11) and the circulating air pipe valve (10) according to the real-time outflow wastewater pollutant concentration. In the initial state, the control system (100) controls the first effluent valve (16) to open, controls the second effluent valve (18) and the third effluent valve (20) to close, obtains the real-time outflow wastewater pollutant concentration, and determines the target outflow wastewater pollutant concentration when the real-time outflow wastewater pollutant concentration is ≤. When the concentration of pollutants is within a certain range, the system enters the ozone catalytic oxidation state. In the ozone catalytic oxidation state, the control system (100) controls the first effluent valve (16) and the third effluent valve (20) to close, and controls the second effluent valve (18) to open, thereby obtaining the real-time effluent pollutant concentration. When the real-time effluent pollutant concentration is less than or equal to the target effluent pollutant concentration, the system enters the adsorption state. In the adsorption state, the control system (100) controls the first effluent valve (16) and the second effluent valve (18) to close, and controls the third effluent valve (20) to open, thereby obtaining the real-time effluent pollutant concentration. When the real-time effluent pollutant concentration is less than or equal to the target effluent pollutant concentration, the system enters the fine-tuning state. In the fine-tuning state, when the difference between the real-time outflow wastewater pollutant concentration and the target outflow wastewater pollutant concentration is less than or equal to the first difference, the opening degree of the catalyst aeration pipe valve (12) is increased, and the opening degree of the adsorption aeration pipe valve (14) is decreased.

10. A wastewater treatment system, comprising a wastewater treatment device, characterized in that, The wastewater treatment device is the wastewater treatment device according to any one of claims 1 to 9.

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