Degradation system and application method thereof

Abstract

The invention discloses a degradation system and an application method thereof, and relates to the field of degradation treatment. In the degradation system, an inlet device is connected with a water source to be treated and is used for conveying wastewater; the uniform distribution device is connected with the inlet device through a pipeline and is used for uniformly distributing wastewater; the air entraining device is used for inputting reaction gas; the NTP reaction device is respectively connected with the uniform distribution device and the air entraining device through pipelines, and is used for degrading the wastewater based on reaction gas by adopting an NTP technology; the absorption device is connected with the NTP reaction device through a pipeline and is used for absorbing a medium in the degraded wastewater; the outlet device is connected with the absorption device through a pipeline and is used for discharging the treated wastewater; the exhaust device is respectively connected with the air entraining device, the NTP reaction device and the absorption device through pipelines and is used for exhausting reaction waste gas. According to the application, degradation-resistant organic pollutants such as environmental endocrine disruptors and antibiotics contained in wastewater can be effectively decomposed, the water treatment efficiency is improved, and the water treatment cost is reduced.

Description

Technical Field

[0001] The present application relates to the field of degradation treatment, and in particular to a degradation system and an application method thereof. Background Art

[0002] Wastewater discharged from the production process of pesticides, industrial chemicals, personal care products, plastic products, food and beverage additives, medicines, dyes, etc. mainly contains environmental endocrine disruptors (EEDs), antibiotics and other difficult-to-degrade organic pollutants, which pose a huge threat to the environment and human health. Traditional wastewater treatment methods such as advanced oxidation methods and biological methods are difficult to effectively decompose such organic matter, resulting in reduced water treatment efficiency, increased treatment costs, and increased treatment risks. Summary of the invention

[0003] The purpose of this application is to provide a degradation system and its application method, which can effectively decompose environmental endocrine disruptors, antibiotics and other difficult-to-degrade organic pollutants contained in wastewater, improve water treatment efficiency and reduce water treatment costs.

[0004] To achieve the above objectives, this application provides the following solutions:

[0005] In a first aspect, the present application provides a degradation system, comprising:

[0006] An inlet device, connected to a water source to be treated, for conveying wastewater;

[0007] A distribution device, connected to the inlet device pipeline, for distributing the wastewater evenly;

[0008] An air bleed device, used for inputting reaction gas;

[0009] An NTP reaction device, connected to the uniform distribution device and the air entrainment device pipelines respectively, for using NTP technology to degrade the wastewater based on the reaction gas;

[0010] An absorption device, connected to the pipeline of the NTP reaction device, for absorbing the medium in the degraded wastewater; the medium includes: NTP particles, intermediates and reaction waste gas;

[0011] An outlet device, connected to the absorption device pipeline, for discharging the treated wastewater;

[0012] The exhaust device is respectively connected to the air induction device, the NTP reaction device and the absorption device pipeline, and is used for exhausting the reaction waste gas.

[0013] Optionally, the degradation system further comprises:

[0014] A pressure stabilizing device is arranged on the connecting pipeline between the inlet device and the uniform distribution device, and is used to stabilize the pressure of the wastewater transported by the inlet device.

[0015] Optionally, the degradation system further comprises:

[0016] The detection device is electrically connected to the inlet device, the voltage stabilizing device, the NTP reaction device, the exhaust device and the outlet device, and is used to detect degradation information; the degradation information includes: the temperature of each device, the conductivity during the degradation process, and the pH value of the wastewater before and after degradation.

[0017] Optionally, the degradation system further comprises:

[0018] The safety protection device is electrically connected to the air intake device, the exhaust device, the NTP reaction device and the voltage stabilizing device respectively, and is used to monitor whether there is a safety fault in the air intake device, the exhaust device, the NTP reaction device and the voltage stabilizing device, and generate an alarm message if there is a safety fault.

[0019] Optionally, the degradation system further comprises:

[0020] A cooling device is respectively connected to the air intake device and the NTP reaction device pipeline, and is electrically connected to the detection device, and is used to cool the NTP reaction device and the reaction gas discharged from the NTP reaction device; the detection device is used to detect the temperature of the cooling device.

[0021] Optionally, the degradation system further comprises:

[0022] The buffer device is arranged on the connecting pipeline between the NTP reaction device and the absorption device, and is used for buffering the degraded wastewater discharged from the NTP reaction device.

[0023] In a second aspect, the present application provides an application method of a degradation system, comprising:

[0024] The wastewater is processed through the uniform distribution device and the air entrainment device into a water film with a thickness not exceeding the set thickness;

[0025] In the NTP reaction device, the water film is degraded according to the set power using NTP technology to obtain degradation products; the degradation products include: degraded wastewater and reaction waste gas;

[0026] The reaction waste gas is cooled by a cooling device and used as a reaction gas source for the air introduction device;

[0027] The degraded wastewater is absorbed by the absorption device and then discharged.

[0028] Optionally, the set thickness does not exceed 7 mm.

[0029] Optionally, the set power is converted according to 1.0-60.0gTOC / kWh.

[0030] According to the specific embodiments provided in this application, this application has the following technical effects:

[0031] The present application provides a degradation system and an application method thereof. By adopting a uniform distribution device, the supply amount in the NTP reaction device can be ensured to be consistent, thereby improving the water treatment efficiency. The NTP reaction device is adopted, and the NTP technology is used to degrade wastewater based on the reaction gas. The medium in the degraded wastewater is further absorbed by an absorption device, which can effectively decompose the environmental endocrine disruptors contained in the wastewater. By connecting the exhaust device to the air entrainment device, the reaction waste gas discharged by the exhaust device can be input into the air entrainment device again for utilization, thereby reducing the water treatment cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 A schematic diagram of the structure of a degradation system provided in this application;

[0034] Figure 2 A schematic diagram of a process for applying a degradation system provided in this application;

[0035] Figure 3 Schematic diagram of the effect of NTC on paracetamol removal rate with the assistance of H2O2 provided for this application;

[0036] Figure 4 Schematic diagram of the effect of NTC on the removal rate of diclofenac sodium with the assistance of H2O2 provided in this application;

[0037] Figure 5 Schematic diagram of the effect of NTP on 2,4-DCP removal rate under different conditions provided in this application;

[0038] Figure 6 Schematic diagram of chlorophenol removal rate under NTP provided in this application;

[0039] Figure 7 Schematic diagram of chlorophenol mineralization rate under NTP provided in this application;

[0040] Figure 8Schematic diagram of tetracycline removal rate under NTP provided in this application;

[0041] Fig. 9 A schematic diagram of oxytetracycline removal rate under the action of NTP provided in this application;

[0042] Fig.10 This is a schematic diagram of the degradation rate of different polyacrylamides under the action of NTP provided in this application. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0044] Non-thermal plasma (NTP) contains a large number of high-energy electrons, ions and excited particles, which are separated by electromagnetic fields to become high-density, high-flow electron beams or ion beams; NTP has anisotropic energy distribution, especially the active atmosphere composed of particles in an excited state (including atoms, molecular fragments, ions, groups, quasi-molecules, etc.), which provides activation energy for chemical reactions and can quickly and efficiently decompose large molecular organic pollutants that are difficult to degrade.

[0045] The application of NTP technology in the industrial treatment of difficult-to-degrade wastewater and the development of its equipment is a new technology for rapidly treating high-COD wastewater containing large molecular difficult-to-degrade organic matter.

[0046] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0047] After the NTP reactor introduces ionized gas (such as air), high-energy particles are generated under the action of the high-voltage circuit, which react quickly with the organic matter in the sewage entering the reactor to achieve chain breaking and decomposition of the organic matter. Based on this NTP technical principle, the present application provides a degradation system, such as Figure 1 As shown, the degradation system includes: an inlet device, a uniform distribution device, an air entrainment device, an NTP reaction device, an absorption device, an outlet device and an exhaust device.

[0048] Among them, the inlet device is connected to the water source to be treated, and the inlet device is mainly used to transport wastewater. The uniform distribution device is connected to the inlet device pipeline, which is mainly used to uniformly distribute wastewater to ensure that the supply amount of each reactor entering the NTP reaction device is consistent. The air induction device is mainly used to input the reaction gas so as to introduce the gas into the NTP reaction device. The NTP reaction device is connected to the uniform distribution device and the air induction device pipeline respectively. The NTP reaction device is mainly used to degrade wastewater based on reaction gas using NTP technology. The absorption device is connected to the NTP reaction device pipeline, which is mainly used to absorb the medium in the degraded wastewater, for example, it can absorb unreacted NTP high-energy particles, intermediates and reaction waste gas. The outlet device is connected to the absorption device pipeline, which is mainly used to discharge the treated wastewater. The exhaust device is connected to the air induction device, the NTP reaction device and the absorption device pipeline respectively, which is mainly used to discharge the reaction waste gas. In addition, the exhaust device can also balance the internal pressure of the reactor in the NTP reaction device by controlling the exhaust volume. Furthermore, by connecting the exhaust device to the air intake device, the reaction waste gas discharged from the exhaust device can be input into the air intake device again for utilization, thereby reducing the water treatment cost.

[0049] In another exemplary embodiment of the present application, the NTP reaction device comprises a high-voltage electrode, an inorganic non-metallic material medium, a grounding port and an atomizing device. Among them, the high-voltage electrode is used to ionize the NTP high-energy particles generated by the gas medium. The inorganic non-metallic material medium is used as a dielectric barrier for NTP and as a reactor at the same time. The grounding port mainly adopts high-voltage grounding to prevent electric shock or leakage. The atomizing device is used to ensure that the wastewater is evenly distributed in the reactor and increase the contact surface.

[0050] Furthermore, the high-voltage electrode may not be loaded with an insulating medium, but may use a non-electrode non-metallic material medium. The non-electrode non-metallic material medium used is a material containing silicon oxide or aluminum oxide, and the effective working distance of this medium is not greater than 26mm. The connection method of each high-voltage electrode in the NTP reaction device is a parallel connection method.

[0051] In another exemplary embodiment of the present application, a particle filter may be provided at the inlet of the inlet device to filter the input reaction gas.

[0052] In another exemplary embodiment of the present application, in order to ensure the stability of the output pressure of the water source to be treated, the degradation system provided by the present application may also include: a pressure stabilizing device.

[0053] The pressure stabilizing device is arranged on the connecting pipeline between the inlet device and the uniform distribution device, and is used to stabilize the pressure of the wastewater transported by the inlet device.

[0054] In actual application, in this embodiment, a constant water head can be used as a pressure stabilizing device to stabilize the voltage.

[0055] In another exemplary embodiment of the present application, in order to be able to detect the degradation state and the operating state of each device in real time, the degradation system provided by the present application may further include: a detection device.

[0056] The detection device is electrically connected to the inlet device, the voltage stabilizing device, the NTP reaction device, the exhaust device and the outlet device, and is mainly used to detect degradation information such as the temperature of each device, the conductivity during the degradation process, and the pH value of the wastewater before and after degradation.

[0057] In actual application, the detection components in the detection device can be installed on the uniform distribution device, the absorption device and the outlet device respectively.

[0058] In another exemplary embodiment of the present application, in order to perform safety alarms or processing for situations such as overpressure, circuit failure, misoperation, idling, etc., the degradation system provided by the present application may also include: a safety protection device.

[0059] The safety protection device is electrically connected to the air intake device, exhaust device, NTP reaction device and voltage stabilizing device respectively. It is mainly used to monitor whether there are safety faults in the air intake device, exhaust device, NTP reaction device and voltage stabilizing device. If there is a safety fault, an alarm message is generated.

[0060] In another exemplary embodiment of the present application, in order to cool down various devices inside the NTP degradation system, especially the NTP reaction device, the degradation system provided by the present application may also include: a cooling device.

[0061] The cooling device is connected to the air inlet device and the NTP reaction device pipeline respectively, and is electrically connected to the detection device, wherein the outlet of the cooling device is also connected to the inlet of the air inlet device. The cooling device is mainly used to cool the NTP reaction device and the reaction gas discharged from the NTP reaction device. The detection device is used to detect the temperature of the cooling device.

[0062] In actual application, the number of outlets of the cooling device may be no less than 2, and correspondingly, the number of inlets of the air bleed device also needs to be no less than 2.

[0063] In another exemplary embodiment of the present application, in order to ensure the stability of the liquid level and thus the flow rate, the degradation system provided by the present application may also include: a buffer device to serve as a buffer medium for the water body after treatment by the NTP reaction device.

[0064] The buffer device is arranged on the connecting pipeline between the NTP reaction device and the absorption device, wherein the buffer device is communicated with the outlet of the NTP reaction device.

[0065] In another exemplary embodiment of the present application, a mobile device can be provided so that the degradation system provided by the present application becomes a degradation device with high decomposition efficiency, high energy efficiency ratio and flexible mobility.

[0066] In another exemplary embodiment of the present application, the present application provides an application method of a degradation system, such as Figure 2 As shown, the method includes:

[0067] Step 200: The wastewater is processed by the uniform distribution device and the air entrainment device into a water film with a thickness not exceeding a set thickness, for example, the set thickness is 7 mm.

[0068] Step 201: In the NTP reaction device, the water film is degraded by using NTP technology according to the set power to obtain degradation products. The degradation products include: degraded wastewater and reaction waste gas. For example, the set power can be converted according to 1.0-60.0gTOC / kWh.

[0069] Step 202: Cool the reaction waste gas through a cooling device and use it as a reaction gas source for the air introduction device.

[0070] Step 203: The degraded wastewater is absorbed by an absorption device and then discharged.

[0071] In another exemplary embodiment of the present application, the process of using the degradation system provided by the present application to perform degradation treatment by selecting the difficult-to-degrade organic matter to be treated with a water content greater than 65% as sewage is as follows:

[0072] (1) The refractory organic matter to be treated is processed into a water film with a thickness not exceeding 7 mm through a uniform distribution device and an air entrainment device.

[0073] (2) The refractory organic matter to be treated is decomposed and treated by the NTP reaction device, and the NTP power design is converted according to 1.0-60.0g TOC / kWh.

[0074] (3) The treatment products formed by decomposition (i.e., degradation products) are discharged into the absorption device through the buffer device.

[0075] (4) Reactor cooling and reaction exhaust gas is used as the gas source for the air induction device. Excess gas enters the absorption device for purification.

[0076] Furthermore, hydrogen peroxide, percarbonate, etc. can be added during the above treatment process to increase the number of NTP high-energy particles and improve the degradation effect.

[0077] The time for the above treatment using the degradation system shall not exceed 60 minutes.

[0078] like Figure 3 and Figure 4 As shown in the figure, the effect of NTC on TOC removal rate assisted by H2O2 can be obtained. Under the conditions of power of 4.7gTOC / kWh and treatment time of 60min, with the assistance of appropriate H2O2, NTP can effectively degrade paracetamol (10mg / L) and diclofenac sodium (10mg / L).

[0079] like Figure 5 As shown, under the conditions of power of 30.0g TOC / kWh and treatment time of 30min, the degradation rate of NTP for 2,4-dichlorophenol (50mg / L) can be as high as 80%. Figure 5 In the figure, lines of different colors indicate that the concentration of 2,4-DCP increases from top to bottom.

[0080] like Figure 6 and Figure 7 As shown, when the power is 10.0g TOC / kWh and the treatment time is 10min, NTP can remove 100% of chlorophenol (300mg / L). After 20min, the degradation rate of chlorophenol (300mg / L) can be as high as 80%. Figure 6 and Figure 7 In the figure, lines of different colors from top to bottom indicate that the concentration of chlorophenols increases successively.

[0081] like Figure 8 and Fig. 9 As shown, at a power of 60.0 g TOC / kWh and a treatment time of 10 min, NTP can remove 100% of tetracycline (50 mg / L) and oxytetracycline (50 mg / L), and the TOC removal rate exceeds 40%. Figure 8 In the figure, lines of different colors from top to bottom indicate increasing concentrations of tetracycline. Fig. 9 In the figure, lines of different colors from top to bottom indicate increasing concentrations of oxytetracycline.

[0082] like Fig.10 The degradation rates of different polyacrylamide under the action of NTP are shown as follows. When the power is 1.0 gTOC / kWh and the treatment time is 10 min, NTP can make the degradation rate of different types of polyacrylamide (1 g / L) exceed 80% removal. Under the optimized conditions, it can be as high as 92%. Fig.10 Among them, PAM is non-ionic polyacrylamide, HPAM is anionic polyacrylamide, and CPAM is cationic polyacrylamide.

[0083] In summary, this application is based on the high energy density and strong oxidation ability of NTP, and the medium treated is not only organic wastewater containing specific COD.

[0084] Those of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM may be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM).

[0085] The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. The non-relational database may include a distributed database based on blockchain, etc., but is not limited thereto. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., but is not limited thereto.

[0086] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0087] This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and core ideas of this application. At the same time, for those skilled in the art, according to the ideas of this application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting this application.

Claims

1. A degradation system, characterized in that: The degradation system comprises: An inlet device, connected to a water source to be treated, for conveying wastewater; A distribution device, connected to the inlet device pipeline, for distributing the wastewater evenly; An air bleed device, used for inputting reaction gas; An NTP reaction device, connected to the uniform distribution device and the air entrainment device pipelines respectively, for using NTP technology to degrade the wastewater based on the reaction gas; An absorption device, connected to the pipeline of the NTP reaction device, for absorbing the medium in the degraded wastewater; the medium includes: NTP particles, intermediates and reaction waste gas; An outlet device, connected to the absorption device pipeline, for discharging the treated wastewater; The exhaust device is respectively connected to the air induction device, the NTP reaction device and the absorption device pipeline, and is used for exhausting the reaction waste gas.

2. The degradation system according to claim 1, characterized in that: The degradation system also includes: A pressure stabilizing device is arranged on the connecting pipeline between the inlet device and the uniform distribution device, and is used to stabilize the pressure of the wastewater transported by the inlet device.

3. The degradation system according to claim 2, characterized in that: The degradation system also includes: The detection device is electrically connected to the inlet device, the voltage stabilizing device, the NTP reaction device, the exhaust device and the outlet device, and is used to detect degradation information; the degradation information includes: the temperature of each device, the conductivity during the degradation process, and the pH value of the wastewater before and after degradation.

4. The degradation system according to claim 3, characterized in that: The degradation system also includes: The safety protection device is electrically connected to the air intake device, the exhaust device, the NTP reaction device and the voltage stabilizing device respectively, and is used to monitor whether there is a safety fault in the air intake device, the exhaust device, the NTP reaction device and the voltage stabilizing device, and generate an alarm message if there is a safety fault.

5. The degradation system according to claim 3, characterized in that: The degradation system also includes: A cooling device is respectively connected to the air intake device and the NTP reaction device pipeline, and is electrically connected to the detection device, and is used to cool the NTP reaction device and the reaction gas discharged from the NTP reaction device; the detection device is used to detect the temperature of the cooling device.

6. The degradation system according to claim 1, characterized in that: The degradation system also includes: The buffer device is arranged on the connecting pipeline between the NTP reaction device and the absorption device, and is used for buffering the degraded wastewater discharged from the NTP reaction device.

7. An application method of a degradation system, characterized in that: The application method of the degradation system comprises: The wastewater is processed through the uniform distribution device and the air entrainment device into a water film with a thickness not exceeding the set thickness; In the NTP reaction device, the water film is degraded according to the set power using NTP technology to obtain degradation products; the degradation products include: degraded wastewater and reaction waste gas; The reaction waste gas is cooled by a cooling device and used as a reaction gas source for the air introduction device; The degraded wastewater is absorbed by the absorption device and then discharged.

8. The application method of the degradation system according to claim 7, characterized in that: The set thickness does not exceed 7 mm.

9. The application method of the degradation system according to claim 7, characterized in that: The set power is converted according to 1.0-60.0g TOC / kWh.

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