Wastewater treatment device and system

Abstract

The invention discloses a wastewater treatment device and system, which is applied to the technical field of wastewater treatment, and comprises: a tank provided with a first cavity, a second cavity and a third cavity, a catalyst layer arranged in the second cavity, and an adsorption filler layer 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 invention, 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, self-cleaning of the adsorption filler is realized, and the service cycle is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of wastewater treatment, and in particular to a wastewater treatment device and system. Background Art

[0002] With the rapid development of my country's economy in recent years, the amount of wastewater generated has increased day by day, and there are more and more toxic and harmful difficult-to-degrade substances in the wastewater, and the difficulty of treatment has gradually increased. Ozone is widely used in the field of wastewater treatment because it has a high redox potential (2.07V) and ozone molecules can directly react with pollutants to oxidize and degrade them. In addition, under the action of the catalyst, ozone catalytic decomposition produces hydroxyl radicals (·OH). Hydroxyl radicals are non-selective and highly oxidizing. They can degrade a variety of pollutants and react quickly. However, the cost of ozone catalytic oxidation is high, and the catalyst may become hardened and inactivated, requiring regular replacement or regeneration. In addition, for some difficult-to-degrade organic substances such as perfluorinated compounds and polychlorinated biphenyls, the effect of ozone oxidation is limited or even ineffective, and it is often necessary to combine other technologies to improve the removal effect of pollutants.

[0003] In the wastewater treatment device of the related art, wastewater is usually introduced into the treatment device through the water inlet pipe, and the treatment device is equipped with different numbers of ozone dosing systems, H 2 O 2 dosing system, specific catalyst dosing system, etc., to catalytically degrade pollutants; however, the wastewater treatment equipment in the related technology is prone to insufficient or waste of ozone dosage, and the catalyst is prone to compaction during operation, which will affect the treatment effect; and, although ozone can remove pollutants that can be oxidized and degraded, the removal rate of difficult-to-degrade pollutants that cannot be oxidized by ozone is low, which leads to the wastewater pollutant removal rate in the related technology being limited and unable to meet market demand.

[0004] Therefore, how to effectively reduce costs and meet the wastewater treatment needs of different pollution levels is a technical problem that technical personnel in this field currently need to solve. Summary of the invention

[0005] The object of the present invention is to provide a wastewater treatment device and system for saving costs and improving the pollutant removal rate of wastewater.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A wastewater treatment device, comprising:

[0008] The tank body is provided with a first cavity, a second cavity and a third cavity which are arranged in sequence from bottom to top and are connected, a catalyst layer is provided in the second cavity, and an adsorption filler layer is provided in the third cavity; the tank body is connected with a water inlet pipe for the wastewater to flow into the first cavity, and a first water outlet pipe, a second water outlet pipe and a third water outlet pipe for the wastewater to flow out of the first cavity, the second cavity and the third cavity respectively; the water inlet pipe is provided with a water inlet valve, and the first water outlet pipe, the second water outlet pipe and the third water outlet pipe are provided with a first water outlet valve, a second water outlet valve and a third water outlet valve respectively;

[0009] An ozone generator is connected to a microporous air inlet pipe, one end of the microporous air inlet pipe 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;

[0010] An outlet wastewater detector, used to detect the real-time pollutant concentration of the wastewater when the wastewater flows out of the tank;

[0011] a circulating air pipe, wherein the inlet of the circulating air pipe is communicated with the top of the third cavity, and the outlet of the circulating air pipe is communicated with the bottom of the third cavity and / or the bottom of the second cavity;

[0012] The control system comprises: the outlet wastewater detector, the ozone generator, the water inlet valve, the first water outlet valve, the second water outlet valve and the third water outlet valve are all connected to the control system, and the control system is used to control the opening or closing of the first water outlet valve, the second water outlet valve and the third water outlet valve according to the real-time outflow wastewater pollutant concentration, control the opening or closing of the circulating air pipe, adjust the generation amount of the ozone generator, and / or adjust the flow rate of the water inlet valve.

[0013] On the other hand, a gas circulation pump and a gas circulation pipe valve are installed on the gas circulation pipe, and the gas circulation pipe valve is arranged on one side of the gas circulation pump close to the inlet of the gas circulation pipe;

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

[0015] On the other hand, the outlet of the circulation air pipe is connected to an adsorption aeration pipe and a catalyst aeration pipe, the adsorption aeration pipe is provided with an adsorption aeration pipe valve, and the catalyst aeration pipe is provided with a catalyst aeration pipe valve;

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

[0017] On the other hand, it also includes an exhaust gas collection and destruction device, which is connected to the top of the tank body through a pipe body; the exhaust gas collection and destruction device is connected to the control system, and the control system 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 installed on the water inlet pipe, which is used to detect the real-time inflow wastewater pollutant concentration when the wastewater flows into the tank body;

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

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

[0021] On the other hand, a first gas flow meter is also installed on the microporous intake pipe, and 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 the detection result of the first gas flow meter is used to determine whether the opening of the microporous intake pipe valve is adjusted to the right position.

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

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

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

[0025] In the ozone catalytic oxidation state, the control system controls the first water outlet valve and the third water outlet valve to close, controls the second water outlet valve to open, obtains the real-time outflow wastewater pollutant concentration, and enters the adsorption state when the real-time outflow wastewater pollutant concentration is ≤ the target outflow wastewater pollutant concentration;

[0026] In the adsorption state, the control system controls the first water outlet valve and the second water outlet valve to close, controls the third water outlet valve to open, obtains the real-time outflow wastewater pollutant concentration, and enters the fine-tuning state when the real-time outflow wastewater pollutant concentration is ≤ the target outflow wastewater pollutant concentration;

[0027] In the fine-tuning state, when the difference between the real-time outflow wastewater pollutant concentration and the target outflow wastewater pollutant concentration is ≤ the first difference, the opening of the catalyst aeration pipe valve is controlled to increase, and the opening of the adsorption aeration pipe valve is controlled to decrease.

[0028] The wastewater treatment device provided by the present invention comprises: a tank body, provided with a first cavity, a second cavity and a third cavity arranged in sequence from bottom to top and connected, a catalyst layer is provided in the second cavity, and an adsorption filler layer is provided in the third cavity; the tank body is connected with a water inlet pipe for the wastewater to flow into the first cavity, and a first water outlet pipe, a second water outlet pipe and a third water outlet pipe for the wastewater to flow out of the first cavity, the second cavity and the third cavity respectively; the water inlet pipe is provided with a water inlet valve, and the first water outlet pipe, the second water outlet pipe and the third water outlet pipe are respectively provided with a first water outlet valve, a second water outlet valve and a third water outlet valve; an ozone generator is connected with a microporous air inlet pipe, one end of the microporous air inlet pipe 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; the outlet an outlet wastewater detector, installed on the tank body, and used to detect the real-time outflow wastewater pollutant concentration of the wastewater when it flows out of the tank body; a circulating air pipe, the inlet of the circulating air pipe is connected to the top of the third cavity, and the outlet of the circulating air pipe is connected to the bottom of the third cavity and / or the bottom of the second cavity; a control system, the outlet wastewater detector, the ozone generator, the water inlet valve, and the first water outlet valve, the second water outlet valve and the third water outlet valve are all connected to the control system, and the control system is used to control the opening or closing of the first water outlet valve, the second water outlet valve and the third water outlet valve according to the real-time outflow wastewater pollutant concentration, control the opening or closing of the circulating air pipe, and adjust the generation amount of the ozone generator, and / or adjust the flow rate of the water inlet valve. The wastewater treatment device provided by the present invention can adjust the generation amount of the ozone generator in a targeted manner according to the actual degree of pollutant removal in the wastewater by acquiring the real-time pollutant concentration of the outflowing wastewater, or adjust the flow of the water inlet valve, or start the ozone catalysis or adsorption function, thereby realizing automatic adjustment of wastewater pollutants and effectively avoiding insufficient or wasteful ozone dosage, thereby significantly saving operating costs; at the same time, through the provision of the circulating air pipe, the utilization rate of ozone can be further improved, the compaction of the catalyst layer and the adsorption filler layer can be avoided, the pollutant removal efficiency in the wastewater can be improved, and the self-cleaning of the adsorption filler can be realized, thereby extending the service life.

[0029] In one embodiment, it also includes an inlet wastewater detector installed on the water inlet pipe, which is used to detect the real-time inflow wastewater pollutant concentration of the wastewater when it flows into the tank body; the inlet wastewater detector is connected to the control system, and the control system is also used to calculate the real-time pollutant removal rate according to the real-time inflow wastewater pollutant concentration and the real-time outflow wastewater pollutant concentration; and according to 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 amount of the ozone generator, and / or adjust the flow of the water inlet valve. In this way, by obtaining the real-time inflow wastewater pollutant concentration of the wastewater when it flows into the tank body, and judging the real-time pollutant removal rate, the pollutant treatment capacity of the device can be more accurately judged, the generation amount of the ozone generator can be more accurately adjusted, or the flow of the water inlet valve can be adjusted, or the ozone catalysis or adsorption function can be started, so as to further reduce costs and improve efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 A schematic structural diagram of a specific implementation of the wastewater treatment device provided by the present invention;

[0032] Figure 2 This is a schematic diagram of the control method of the control system in the wastewater treatment device provided by the present invention.

[0033] Reference numerals:

[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 filler layer; 8-adsorption aeration pipe; 9-circulating air pipe; 10-circulating air 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-water outlet main pipe; 22-tail gas collection and destruction device; 23-microporous air inlet pipe valve; 24-1-export wastewater detector; 24-2-inlet wastewater detector. DETAILED DESCRIPTION

[0035] The core of the present invention is to provide a wastewater treatment device and system, which can improve the utilization rate of ozone and realize automatic regulation.

[0036] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0037] Please refer to Figure 1 and Figure 2 , Figure 1 A schematic structural diagram of a specific implementation of the wastewater treatment device provided by the present invention; Figure 2 This is a schematic diagram of the control method of the control system in the wastewater treatment device provided by the present invention.

[0038] In this embodiment, the wastewater treatment plant comprises:

[0039] The tank body 1 is provided with a first cavity 1-1, a second cavity 1-2 and a third cavity 1-3 which are arranged in sequence from bottom to top and are connected, a catalyst layer 5 is provided in the second cavity 1-2, and an adsorption filler layer 7 is provided in the third cavity 1-3; the tank body 1 is connected with a water inlet pipe 3 for wastewater to flow into the first cavity 1-1, and a first water outlet pipe 15, a second water outlet pipe 17 and a third water 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 water inlet pipe 3 is provided with a water inlet valve, and the first water outlet pipe 15, the second water outlet pipe 17 and the third water outlet pipe 19 are provided with a first water outlet valve 16, a second water outlet valve 18 and a third water outlet valve 20 respectively;

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

[0041] The outlet wastewater detector 24-1 is used to detect the real-time outflow wastewater pollutant concentration when the wastewater flows out of the tank body 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 by setting the outlet main pipe 21;

[0042] A circulating air pipe 9, wherein the inlet of the circulating air pipe 9 is connected to the top of the third cavity 1-3, and the outlet of the circulating air pipe 9 is 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, the wastewater detector, the ozone generator 4, the water inlet valve, and the first water outlet valve 16, the second water outlet valve 18 and the third water 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 water outlet valve 16, the second water outlet valve 18 and the third water outlet valve 20 according to the real-time concentration of pollutants in the outflowing wastewater, control the opening or closing of the circulating air pipe 9, and adjust the generation amount of the ozone generator 4, and / or adjust the flow of the water inlet valve.

[0044] Of course, by obtaining the pollutant concentration of the inflowing wastewater, the control system 100 calculates the real-time pollutant removal rate according to the real-time outflowing wastewater pollutant concentration and the inflowing wastewater pollutant concentration, and controls the opening or closing of the first water outlet valve 16, the second water outlet valve 18 and the third water outlet valve 20, controls the opening or closing of the circulating air pipe 9, and adjusts the generation amount of the ozone generator 4, and / or adjusts the flow rate of the water inlet valve according to the size 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 outflowing wastewater pollutant concentration and the target outflowing wastewater pollutant concentration, or the difference between the real-time pollutant removal rate and the target pollutant removal rate.

[0045] Specifically, the 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 indicates the amount of oxygen consumed by reducing substances in a water sample that can be oxidized by strong oxidants under certain conditions; TOC indicates the total amount of carbon in soluble 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 is provided with a first cavity 1-1, a second cavity 1-2 and a third cavity 1-3, a catalyst layer 5 is provided in the second cavity 1-2, and an adsorption filler layer 7 is provided in the third cavity 1-3; when direct ozone oxidation can meet the requirements, at this time, it is only necessary to open the first water outlet valve 16, close the second water outlet valve 18 and the third water outlet valve 20, and the wastewater enters the tank body 1 through the water inlet pipe 3, passes through the first cavity 1-1, and is discharged from the tank body 1 through the first water outlet pipe 15; when direct ozone oxidation cannot meet the requirements, ozone catalytic oxidation is added ... and at this time, it is only necessary to open the first water outlet valve 16, close the second water outlet valve 18 and the third water outlet valve 20, and the wastewater enters the tank body 1 through the water inlet pipe 3, passes through the first cavity 1-1, and is discharged from the tank body 1 through the first water outlet pipe 15. The second water outlet valve 18 is opened, and the first water outlet valve 16 and the third water outlet valve 20 are closed. The wastewater enters the tank body 1 through the water inlet pipe 3, passes through the first cavity 1-1 and the second cavity 1-2, and is discharged from the tank body 1 through the second water outlet pipe 17; when ozone catalytic oxidation cannot meet the requirements, the adsorption function is added. At this time, it is only necessary to open the third water outlet valve 20, close the first water outlet valve 16 and the second water outlet valve 18, and the wastewater enters the tank body 1 through the water 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 body 1 through the third water outlet pipe 19;

[0047] The above three methods can be switched at any time as the real-time outflow wastewater pollutant concentration fluctuates. The control system 100 can adjust the start and close states of the first outlet valve 16, the second outlet valve 18 and the third outlet valve 20 at any time, so as to meet the wastewater treatment needs in different application scenarios. Specifically, when the ozone catalytic oxidation function is turned on, when it is detected that the difference between the real-time outflow wastewater pollutant concentration and the target outflow wastewater pollutant concentration is ≥ the first target difference, the second outlet valve 18 and the third outlet valve 20 are closed, and the first outlet valve 16 is opened again to enter the ozone direct oxidation again. When the adsorption function is turned on, if it is detected that the difference between the real-time outflow wastewater pollutant concentration and the target outflow wastewater pollutant concentration is ≥ the second target difference, the third water outlet valve 20 and the first water outlet valve 16 are closed, and the second water outlet valve 18 is opened again to start the ozone catalytic oxidation function; when the adsorption function is turned on, if it is detected that the difference between the real-time outflow wastewater pollutant concentration and the target outflow wastewater pollutant concentration is ≥ the third target difference, the third water outlet valve 20 and the second water outlet valve 18 are closed, and the first water outlet valve 16 is opened again to enter the ozone direct oxidation function again.

[0048] Furthermore, the first water outlet pipe 15, the second water outlet pipe 17 and the third water 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 more fully contact with the ozone, the ozone oxidation layer and / or the adsorption filler layer 7, thereby improving the pollutant removal efficiency.

[0049] Furthermore, through the setting of the circulating air pipe 9, the circulating air pipe 9 sends ozone back to the second cavity 1-2 and the third cavity 1-3, thereby improving the utilization rate; at the same time, the concentration of pollutants in the outflowing wastewater can be fine-tuned by adjusting the proportion of ozone sent back to the second cavity 1-2 and the third cavity 1-3, without adjusting the generation amount of the ozone generator 4 and the flow rate of the water inlet pipe 3, thereby further facilitating operation and saving costs.

[0050] The wastewater treatment device provided by the present invention can adjust the generation amount of the ozone generator 4 in a targeted manner according to the actual degree of pollutant removal in the wastewater by acquiring the real-time pollutant concentration of the outflowing wastewater, or adjust the flow of the water inlet valve, or start the ozone catalysis or adsorption function, thereby realizing automatic adjustment of the wastewater pollutants, and effectively avoiding insufficient or wasteful ozone dosage, thereby significantly saving operating costs; at the same time, through the setting of the circulating air pipe 9, the utilization rate of ozone can be further improved, the compaction of the catalyst layer 5 and the adsorption filler layer 7 can be avoided, the pollutant removal efficiency in the wastewater can be improved, and the self-cleaning of the adsorption filler can be realized, thereby extending the service life.

[0051] In some embodiments, a gas circulation pump 11 and a circulating air pipe valve 10 are installed on the circulating air pipe 9, and the circulating air pipe valve 10 is arranged on the side of the gas circulation pump 11 close to the inlet of the circulating air pipe 9; the gas circulation pump 11 and the circulating air pipe valve 10 are both connected to the control system 100, and 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 concentration of pollutants in the outflowing wastewater; specifically, the gas circulation pump 11 can provide power for the airflow in the circulating air pipe 9, and the setting of the circulating air pipe valve 10 can prevent the ozone in the tank body 1 from corroding the gas circulation pump 11, and when there is no need to start the ozone catalytic oxidation function and the adsorption function, the circulating air pipe valve 10 can remain in a closed state.

[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; the adsorption aeration pipe 8 and the catalyst aeration pipe 6 are both microporous aeration pipes;

[0053] The adsorption aeration pipe valve 14 and the catalyst aeration pipe valve 12 are both connected to the control system 100, and the control system 100 is also used to control the opening of the adsorption aeration pipe valve 14 and the catalyst aeration pipe valve 12 according to the real-time concentration of pollutants in the outflowing wastewater. Specifically, the adsorption aeration pipe valve 14 and the catalyst aeration pipe valve 12 can be opened selectively. 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, starts the gas circulation pump 11, and returns the unreacted ozone to the tank body 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 being hardened and affecting the wastewater treatment effect. When the adsorption function is started, the control system 100 starts the gas circulation system and opens the gas circulation system. Open the circulating gas pipe valve 10, close the catalyst aeration pipe valve 12, start the gas circulation pump 11, and pump the unreacted ozone back to the tank 1 for reuse. The circulating gas has a flushing effect on the adsorption filler layer 7 to prevent the adsorption filler layer 7 from being hardened. At the same time, ozone reacts with the pollutants adsorbed by the adsorption filler to play a role in self-cleaning and regenerating the adsorption filler. 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 enhance the interaction between ozone and the catalyst layer 5, thereby further enhancing the pollutant removal effect.

[0054] In some embodiments, an exhaust gas collection and destruction device 22 is also included, and the exhaust gas collection and destruction device 22 is connected to the top of the tank body 1 through a pipe body; the exhaust gas collection and destruction device 22 is connected to the control system 100, and the control system 100 is used to control 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, which is installed on the water inlet pipe 3 and is used to detect the real-time inflow wastewater pollutant concentration when the wastewater flows into the tank body 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 according to the real-time inflow wastewater pollutant concentration and the real-time outflow wastewater pollutant concentration; and according to the real-time pollutant removal rate, the first outlet valve 16, the second outlet valve 18 and the third outlet valve 20 are controlled to be opened or closed, the circulation air pipe 9 is controlled to be opened or closed, the amount of ozone generator 4 is adjusted, and / or the flow of the water inlet valve is adjusted. In this way, by obtaining the real-time inflow wastewater pollutant concentration when the wastewater flows into the tank body 1, by judging the real-time pollutant removal rate, the pollutant treatment capacity of the device can be more accurately judged, the amount of ozone generator 4 can be more accurately adjusted, or the flow of the water inlet valve can be adjusted, or the ozone catalysis or adsorption function can be started, so as to further reduce costs and improve efficiency.

[0056] Of course, the numerical value of the pollutant concentration of the inflowing wastewater 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 pollutant concentration in the wastewater changes greatly, it is suitable to add an inlet wastewater detector 24-2 to the water inlet pipe 3. For scenarios where the pollutant concentration in the wastewater changes little, the arrangement of the inlet wastewater detector 24-2 can be saved.

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

[0058] It should be noted here that when the real-time outflowing wastewater pollutant concentration cannot meet the requirements, it should first be adjusted by increasing the generation amount of the ozone generator 4 and / or reducing the flow rate of the water inlet valve; when the real-time outflowing wastewater pollutant concentration still cannot meet the requirements, the ozone catalytic oxidation function, or the ozone catalytic oxidation function + adsorption function is started.

[0059] In some embodiments, a first gas flow meter 13 is also installed on the microporous air inlet pipe 2, and 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 the detection result of the first gas flow meter 13 is used to judge whether the opening of the microporous air inlet pipe valve 23 is adjusted in place, which has a good feedback effect. Further, the adsorption aeration pipe 8 and the catalyst aeration pipe 6 are respectively installed with a second gas flow meter 13 and a third gas flow meter 13, and the gas flow meter 13 is connected to the control system 100. The control system 100 is used to obtain the detection result of the gas flow meter 13, and judge whether the opening of the adsorption aeration pipe valve 14 and the catalyst aeration pipe valve 12 is adjusted in place.

[0060] In some embodiments, it also includes a water outlet main pipe 21, the first water outlet pipe 15, the second water outlet pipe 17 and the third water outlet pipe 19 are all connected to the water outlet main pipe 21, and the first water outlet pipe 15, the second water outlet pipe 17 and the third water outlet pipe 19 are connected to the water outlet main pipe 21; the outlet wastewater detector 24-1 is installed at the end of the water outlet main pipe 21 away from the tank body 1 for easy arrangement; or, an outlet wastewater detector 24-1 can be installed on the first water outlet pipe 15, the second water outlet pipe 17 and the third water outlet pipe 19 respectively to meet the use requirements.

[0061] In some embodiments, the outlet of the circulating gas 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, and 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 outflow wastewater pollutant concentration;

[0062] In the initial state, the control system 100 controls the first outlet valve 16 to open, controls the second outlet valve 18 and the third outlet valve 20 to close, obtains the real-time outflow wastewater pollutant concentration, and enters the ozone catalytic oxidation state when the real-time outflow wastewater pollutant concentration is ≤ the target outflow wastewater pollutant concentration;

[0063] In the ozone catalytic oxidation state, 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 outflow wastewater pollutant concentration, and enters the adsorption state when the real-time outflow wastewater pollutant concentration is ≤ the target outflow wastewater pollutant concentration;

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

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

[0066] Of course, when the difference between the real-time outflow wastewater pollutant concentration and the target outflow wastewater pollutant concentration is greater than the first difference, it is still necessary to control the flow of the water inlet valve to decrease, or control the generation amount of the ozone generator 4 to increase, or control the flow of the water inlet valve to decrease and the generation amount of the ozone generator 4 to increase at the same time; since the pollutant removal effect of ozone catalytic oxidation is better than the pollutant removal effect during adsorption, the target outflow wastewater pollutant concentration is fine-tuned by increasing the opening of the catalyst aeration pipe valve 12; of course, the ozone flow rate returning to the third cavity 1-3 should not be too small, so as not to play the role of self-cleaning and regenerating the adsorption filler. It should be noted that before entering the fine-tuning state, the opening of the catalyst aeration pipe valve 12 and the adsorption aeration pipe valve 14 can be maximum, and the ozone gas is freely distributed through the circulating air pipe 9 and returned to the second cavity 1-2 and the third cavity 1-3;

[0067] The above configuration provides the judgment basis and control method of the control system 100 under several different states, which can maximize the utilization rate of ozone while simplifying the operation process to meet the use requirements.

[0068] Embodiment 1:

[0069] Wastewater enters the tank body 1 from the water inlet pipe 3, the microporous air inlet pipe valve 23 and the water outlet pipe valve are opened, the circulating air pipe valve 10, the catalyst aeration pipe valve 12, the adsorption aeration pipe valve 14, the second water outlet valve 18 and the third water outlet valve 20 are closed, the ozone generator 4 is turned on, and the wastewater is directly oxidized by ozone. The treated wastewater is discharged from the first water outlet pipe 15 into the water outlet main pipe 21. The inlet wastewater detector 24-2 and the outlet wastewater detector 24-1 monitor the concentration of target pollutants in the inlet and outlet water in real time. The control system 100 is provided with a target pollutant removal rate. The real-time pollutant removal rate is calculated according to the real-time measured concentration 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 the real-time outflow wastewater pollutant concentration is ≤ the target outflow wastewater pollutant concentration, the control system 100 adjusts to reduce the generation amount of the ozone generator 4 or increase the inlet flow rate to improve the ozone utilization rate.

[0070] Embodiment 2:

[0071] The difference from Example 1 is that after the control system 100 adjusts the generation amount or water inlet flow of the ozone generator 4, the real-time pollutant removal rate of the 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 water 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 water outlet valve 16, and the wastewater overflows the catalyst layer 5. The wastewater after ozone catalytic oxidation is discharged from the second water outlet pipe 17 into the water outlet total Pipe 21, the control system 100 calculates the real-time pollutant removal rate according to the target pollutant concentrations in the inlet and outlet water monitored in real time. If the real-time pollutant removal rate is greater than the set target pollutant removal rate, or the real-time outflow wastewater pollutant concentration is ≤ the target outflow wastewater pollutant concentration, the control system 100 adjusts to reduce the generation amount of the ozone generator 4 or increases the inlet flow rate to improve the ozone utilization rate. The gas circulation pump 11 returns the unreacted ozone to the tank 1 for reuse. At the same time, the circulating gas flushes the catalyst to avoid the compaction of the catalyst layer 5 and improve the pollutant removal efficiency.

[0072] Embodiment 3:

[0073] The difference from Examples 1 and 2 is that after the control system 100 adjusts the generation amount or water inlet flow of the ozone generator 4, the real-time pollutant removal rates of the wastewater treated by direct ozone oxidation and catalytic oxidation are both less than the set target pollutant removal rates. At this time, the control system 100 starts the adsorption system and the gas circulation system, opens the third water 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 water outlet valve 16 and the second water outlet valve 18, the wastewater overflows the adsorption packing layer 7, and the wastewater adsorbed by the packing is discharged from the third water outlet pipe 19 into the water outlet main pipe 21. The control system 10 0 The real-time pollutant removal rate is calculated according to the target pollutant concentrations in the inlet and outlet water monitored in real time. If the real-time pollutant removal rate is greater than the set target pollutant removal rate, or the real-time outflow wastewater pollutant concentration is ≤ the target outflow wastewater pollutant concentration, the control system 100 adjusts to reduce the generation amount of the ozone generator 4 or increase the inlet flow rate to improve the ozone utilization rate. The gas circulation pump 11 returns the unreacted ozone to the tank body 1 for reuse. The circulating gas flushes the adsorption filler to avoid the compaction of the adsorption filler layer 7. At the same time, it reacts with the pollutants adsorbed by the filler to achieve self-cleaning of the filler, extend the service life of the filler, and reduce operating costs.

[0074] Embodiment 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 ≤ 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 ≤ the first difference, then the control 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] The wastewater treatment device determines whether to adjust the generation amount or water inlet flow of the ozone generator 4 according to the real-time pollutant removal rate of the target pollutant, thereby avoiding insufficient or wasteful ozone dosage and saving operation cost; by controlling the start and stop of the ozone catalytic oxidation function and the adsorption function, the device realizes the enhanced removal of ozone direct oxidation and catalytic oxidation of difficult-to-degrade substances in the wastewater respectively, and can meet the treatment of wastewater with large water quality fluctuations; through the setting of the gas circulation system, the utilization rate of ozone is further improved, and gas flushing avoids the compaction of the catalyst layer 5 and the adsorption filler layer 7, thereby improving the removal efficiency, and at the same time realizing the self-cleaning of the adsorption filler, extending the service life and reducing the operation cost; a plurality of wastewater treatment systems are integrated into one, the device has a compact structure, is easy to operate, and is convenient for design, expansion and engineering application.

[0077] The above is a detailed introduction to the wastewater treatment device and system provided by the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified in a number of ways, and these improvements and modifications also fall within the scope of protection of the present invention.

Claims

1. A wastewater treatment device, characterized in that: include: A tank body (1) is provided with a first cavity (1-1), a second cavity (1-2) and a third cavity (1-3) which are arranged in sequence from bottom to top and are connected, a catalyst layer (5) is provided in the second cavity (1-2), and an adsorption filler layer (7) is provided in the third cavity (1-3); the tank body (1) is connected with a water inlet pipe (3) for the wastewater to flow into the first cavity (1-1), and a first water outlet pipe (15), a second water outlet pipe (17) and a third water outlet pipe (19) for the wastewater to flow out of the first cavity (1-1), the second cavity (1-2) and the third cavity (1-3) respectively; the water inlet pipe (3) is provided with a water inlet valve, and the first water outlet pipe (15), the second water outlet pipe (17) and the third water outlet pipe (19) are provided with a first water outlet valve (16), a second water outlet valve (18) and a third water outlet valve (20) respectively; An 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 body (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 pollutant concentration of the wastewater when the wastewater flows out of the tank (1); a circulating air pipe (9), wherein an inlet of the circulating air pipe (9) is in communication with the top of the third cavity (1-3), and an outlet of the circulating air pipe (9) is in communication with the bottom of the third cavity (1-3) and / or the bottom of the second cavity (1-2); A control system (100), wherein the outlet wastewater detector (24-1), the ozone generator (4), the water inlet valve, and the first water outlet valve (16), the second water outlet valve (18), and the third water outlet valve (20) are all connected to the control system (100), and the control system (100) is used to control the opening or closing of the first water outlet valve (16), the second water outlet valve (18), and the third water outlet valve (20) according to the real-time concentration of pollutants in the outflowing wastewater, control the opening or closing of the circulation air pipe (9), adjust the generation amount of the ozone generator (4), and / or adjust the flow rate of the water inlet valve.

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

3. The wastewater treatment device according to claim 2, characterized in that: The outlet of the circulation 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 adsorption aeration pipe valve (14) and the catalyst aeration pipe valve (12) are both connected to the control system (100), and the control system (100) is also used to control the opening of the adsorption aeration pipe valve (14) and the catalyst aeration pipe valve (12) according to the real-time outflow wastewater pollutant concentration.

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

5. The wastewater treatment device 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 water inlet pipe (3) and is used to detect the real-time pollutant concentration of the inflowing wastewater when the wastewater flows into the tank body (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 according to the real-time inflow wastewater pollutant concentration and the real-time outflow wastewater pollutant concentration, and control the opening or closing of the first water outlet valve (16), the second water outlet valve (18) and the third water outlet valve (20) according to the real-time pollutant removal rate, control the opening or closing of the circulation air pipe (9), adjust the generation amount of the ozone generator (4), and / or adjust the flow rate of the water inlet valve.

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

7. The wastewater treatment device 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 a detection result of the first gas flow meter (13), and to judge whether the opening of the microporous air inlet pipe valve (23) is adjusted to the correct position based on the detection result of the first gas flow meter (13).

8. The wastewater treatment device according to any one of claims 1 to 4, characterized in that: It also includes a water outlet main pipe (21), the first water outlet pipe (15), the second water outlet pipe (17) and the third water outlet pipe (19) are all connected to the water outlet main pipe (21), and one of the first water outlet pipe (15), the second water outlet pipe (17) and the third water outlet pipe (19) is connected to the water outlet main pipe (21); and the outlet wastewater detector (24-1) is installed at one end of the water outlet main pipe (21) away from the tank body (1).

9. The wastewater treatment device according to claim 8, characterized in that: The outlet of the circulation 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); the catalyst aeration pipe (6) is provided with a catalyst aeration pipe valve (12); the control system (100) is further used to control the opening or closing of the gas circulation pump (11) and the circulation air pipe valve (10) according to the real-time outflow wastewater pollutant concentration; In an initial state, the control system (100) controls the first water outlet valve (16) to open, controls the second water outlet valve (18) and the third water outlet valve (20) to close, obtains the real-time outflow wastewater pollutant concentration, and enters an ozone catalytic oxidation state when the real-time outflow wastewater pollutant concentration is ≤ the target outflow wastewater pollutant concentration; In the ozone catalytic oxidation state, the control system (100) controls the first water outlet valve (16) and the third water outlet valve (20) to be closed, controls the second water outlet valve (18) to be opened, obtains the real-time outflow wastewater pollutant concentration, and enters the adsorption state when the real-time outflow wastewater pollutant concentration is less than or equal to the target outflow wastewater pollutant concentration; In the adsorption state, the control system (100) controls the first water outlet valve (16) and the second water outlet valve (18) to close, controls the third water outlet valve (20) to open, obtains the real-time outflow wastewater pollutant concentration, and enters a fine-tuning state when the real-time outflow wastewater pollutant concentration is ≤ the target outflow wastewater pollutant concentration; In the fine-tuning state, when the difference between the real-time outflow wastewater pollutant concentration and the target outflow wastewater pollutant concentration is ≤ the first difference, the opening of the catalyst aeration pipe valve (12) is controlled to increase, and the opening of the adsorption aeration pipe valve (14) is controlled to decrease.

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.

Images