Ozone advanced oxidation deep sewage treatment device

Abstract

This utility model discloses an ozone advanced oxidation deep wastewater treatment device, belonging to the field of papermaking wastewater treatment technology. It includes an ozone reaction tower, a secondary sedimentation tank, an intermediate tank, a high-speed dissolved air device, and an ozone catalytic packing layer. The high-speed dissolved air device is equipped with a hydrogen peroxide inlet for introducing hydrogen peroxide and an ozone input pipe for introducing ozone. The ozone catalytic packing layer is disposed inside the ozone reaction tower. A mixing and releasing device is installed between the high-speed dissolved air device and the ozone input pipe. The high-speed dissolved air device is disposed inside the ozone reaction tower and is equipped with a wastewater transport pipe. This utility model provides an ozone advanced oxidation deep wastewater treatment device that can achieve non-selective and thorough removal of various organic and inorganic pollutants, while also removing nitrite, suspended solids, and performing decolorization, deodorization, sterilization, and disinfection.

Description

Technical Field

[0001] This utility model belongs to the field of papermaking wastewater treatment, specifically relating to an ozone advanced oxidation deep wastewater treatment device. Background Technology

[0002] The paper industry is a barometer of my country's national economy and a major consumer of industrial water and wastewater. In order to meet the requirements of national environmental protection and energy conservation as well as enterprise development, the national and local governments are constantly raising the standards for pollutant discharge, which directly promotes the development of advanced wastewater treatment technologies.

[0003] Currently, most paper mills use Fenton oxidation as a tertiary treatment for papermaking wastewater. It is one of the commonly used advanced treatment processes for papermaking wastewater. While effectively removing pollutants, it has achieved certain results. However, Fenton treatment has disadvantages such as long reaction time, large consumption of reagents and sludge production, serious secondary pollution, and high treatment costs. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide an ozone advanced oxidation deep wastewater treatment device. Ozone will rapidly degrade into oxygen in the air, so there will be no ozone residue problem. Ozone is a clean and efficient substance for degrading wastewater and can effectively reduce production costs.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: an ozone advanced oxidation deep wastewater treatment device, comprising an ozone reaction tower, a secondary sedimentation tank, an intermediate tank, a high-speed dissolved air device, and an ozone catalytic packing layer. The high-speed dissolved air device is provided with a hydrogen peroxide inlet for introducing hydrogen peroxide, and the high-speed dissolved air device is provided with an ozone input pipe for introducing ozone.

[0006] The secondary sedimentation tank, intermediate tank and high-speed dissolved air device are connected to each other in sequence through pipelines, and the ozone catalytic packing layer is set inside the ozone reaction tower.

[0007] A mixing and releasing device is installed between the high-speed dissolved air device and the ozone input pipeline. The mixing and releasing device is used to release ozone into the wastewater in the form of tiny bubbles smaller than 100 μm.

[0008] The high-speed dissolved air device is used to mix ozone, reflux wastewater and hydrogen peroxide evenly. The high-speed dissolved air device is installed inside the ozone reaction tower. The high-speed dissolved air device is equipped with a wastewater transport pipe, which is used to transport the mixed wastewater to the bottom of the ozone reaction tower.

[0009] Optionally, the ozone reaction tower is equipped with a temperature sensor for real-time monitoring of the reaction temperature and a temperature control device for regulating and controlling the reaction environment temperature.

[0010] Optionally, the temperature control device includes a steam heating device for heating and a water cooling device for cooling.

[0011] Optionally, the ozone reaction tower is equipped with a pH sensor and an automatic acid / alkali material addition device.

[0012] Optionally, a valve A is installed on the wastewater transport pipeline, and the valve A is a solenoid valve.

[0013] Optionally, the top of the ozone reaction tower is provided with a tail gas emission pipe for discharging the tail gas after the reaction, and the tail gas emission pipe is provided with a tail gas treatment device.

[0014] Optionally, the ozone reaction tower is equipped with an inlet and an outlet. The inlet is connected to an intermediate pool pipeline, and a valve B, which is a solenoid valve, is installed on the pipeline between the inlet and the intermediate pool.

[0015] Optionally, the secondary sedimentation tank is a secondary sedimentation tank in the wastewater treatment system of a paper mill.

[0016] Compared with the prior art, the beneficial effects achieved by this utility model are as follows:

[0017] (1) The ozone reaction tower mainly adopts the combined action of metal ions / ozone / hydrogen peroxide. The main reaction principle is that ozone is oxidized by the metal on the surface of the catalyst to produce highly active hydroxyl radicals (hydroxyl radicals). At the same time, hydrogen peroxide will dissociate to produce HO2-. HO2- will react with ozone to produce highly active hydroxyl radicals. Hydrogen peroxide can accelerate the rate of ozone decomposition to produce water hydroxyl radicals. Hydrogen radicals with stronger oxidizing power directly mineralize pollutants in wastewater into inorganic substances or convert them into low-toxicity, easily biodegradable intermediate products. This technology mainly uses hydroxyl radicals as the core strong oxidant to remove various organic and inorganic pollutants without selection. At the same time, it can also remove nitrite, suspended solids, decolorize and deodorize, sterilize and disinfect, so as to meet the national wastewater discharge standards.

[0018] (2) The temperature control device ensures the stability and adjustability of the reaction system temperature through steam heating and water cooling, and at the same time maintains the stability and adjustability of the reaction system pH by automatically adding acid and alkali materials; Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 This is a schematic diagram of the structure in a preferred embodiment of the present invention;

[0021] The components are as follows: 1. Ozone reaction tower; 2. Secondary sedimentation tank; 3. Intermediate tank; 4. High-speed dissolved air device; 5. Ozone catalytic packing layer; 6. Dioxide inlet; 7. Ozone input pipeline; 8. Mixing and releasing device; 9. Wastewater transport pipeline; 10. Temperature sensor; 11. Temperature control device; 12. Steam heating device; 13. Water cooling device; 14. pH sensor; 15. Automatic acid and alkali material addition device; 16. Valve A; 17. Tail gas emission pipeline; 18. Tail gas treatment device; 19. Inlet; 20. Outlet; 21. Valve B. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. These drawings are simplified schematic diagrams, which are only used to illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0023] It should be noted that if directional indicators (such as up, down, bottom, top, etc.) are involved in this embodiment, these directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" and "second" may explicitly or implicitly include one or more of that feature. Unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances. Example 1

[0024] like Figure 1 As shown, an ozone advanced oxidation deep wastewater treatment device includes an ozone reaction tower 1, a secondary sedimentation tank 2, an intermediate tank 3, a high-speed dissolved air device 4, and an ozone catalytic packing layer 5. The high-speed dissolved air device 4 is provided with a hydrogen peroxide inlet 6 for introducing hydrogen peroxide, and an ozone input pipe 7 for introducing ozone.

[0025] The secondary sedimentation tank 2, intermediate tank 3 and high-speed dissolved air device 4 are connected to each other in sequence through pipelines, and the ozone catalytic packing layer 5 is set inside the ozone reaction tower 1.

[0026] A mixing and releasing device 8 is installed between the high-speed dissolved air device 4 and the ozone input pipe 7. The mixing and releasing device 8 is used to release ozone into the wastewater in tiny bubbles of less than 100 μm.

[0027] The high-speed dissolved air device 4 is used to mix ozone, reflux wastewater and hydrogen peroxide evenly. The high-speed dissolved air device 4 is set inside the ozone reaction tower 1. The high-speed dissolved air device 4 is equipped with a wastewater transport pipe 9, which is used to transport the mixed wastewater to the bottom of the ozone reaction tower 1.

[0028] In this embodiment, wastewater first flows out of the secondary sedimentation tank 2 and enters the intermediate tank 3 through a pipeline for temporary storage and buffering. Subsequently, the wastewater and hydrogen peroxide enter the high-speed dissolved air device 4, while ozone also enters the device through the ozone input pipeline 7. Inside the high-speed dissolved air device 4, the mixing and releasing device 8 uniformly releases ozone into the wastewater in the form of tiny bubbles smaller than 100µm, ensuring thorough mixing of ozone, return wastewater, and hydrogen peroxide. The mixed wastewater is then transported through the wastewater transport pipeline 9 to the bottom of the ozone reaction tower 1 for oxidation. The ozone rapidly degrades into oxygen in the air, eliminating any ozone residue issues. This method is a clean and efficient wastewater degradation agent that effectively reduces production costs. Example 2

[0029] like Figure 1 As shown, based on Example 1, the ozone reaction tower 1 is equipped with a temperature sensor 10 for real-time detection of the reaction temperature and a temperature control device 11 for regulating and controlling the reaction environment temperature.

[0030] like Figure 1 As shown, the temperature control device 11 includes a steam heating device 12 for heating and a water cooling device 13 for cooling.

[0031] like Figure 1 As shown, the ozone reaction tower 1 is equipped with a pH sensor 14 and an automatic acid and alkali material addition device 15.

[0032] In this embodiment, inside the ozone reaction tower 1, a temperature sensor 10 monitors the reaction temperature in real time and feeds the data back to the temperature control device 11. The temperature control device 11 automatically adjusts the temperature inside the ozone reaction tower 1 according to the set temperature range. When the temperature inside the ozone reaction tower 1 is too high, the water cooling device 13 is activated to lower the temperature inside the ozone reaction tower 1 by circulating cooling water. Conversely, when the temperature is too low, the steam heating device 12 is activated to introduce steam into the ozone reaction tower 1 to raise the temperature, ensuring that the oxidation reaction proceeds at the optimal temperature. A pH sensor 14 monitors the pH value inside the ozone reaction tower 1 in real time and feeds the data back to the control system. When the pH value deviates from the set range, the control system activates the automatic acid / alkali material addition device 15 to add an appropriate amount of acid / alkali material to the ozone reaction tower 1 to adjust the pH value to the optimal range.

[0033] Working Principle: First, wastewater flows out from the secondary sedimentation tank (secondary sedimentation tank 2) of the paper mill's wastewater treatment system. Then, the wastewater enters the intermediate tank 3 for temporary storage and buffering. Next, the wastewater and hydrogen peroxide enter the high-speed dissolved air device 4 located inside the ozone reaction tower 1. Simultaneously, ozone also enters this device through the ozone input pipe 7. Inside the high-speed dissolved air device 4, the mixing and releasing device 8 evenly releases ozone into the wastewater in the form of microbubbles smaller than 100µm. This microbubble form greatly increases the contact area between ozone and wastewater, allowing ozone, return wastewater, and hydrogen peroxide to mix thoroughly. The mixed wastewater is then transported to the bottom of the ozone reaction tower 1 through the wastewater transport pipe 9. Inside the ozone reaction tower 1, the temperature sensor 10 monitors the reaction temperature in real time and feeds the data back to the temperature control device 11. The temperature control device 11 flexibly adjusts the temperature inside the ozone reaction tower 1 according to the set temperature range. When the temperature is too high, the water cooling device 13 is activated to lower the temperature by circulating cooling water; when the temperature is too low, the steam heating device 12 is activated to introduce steam into the ozone reaction tower 1 to raise the temperature. This precise temperature control ensures that the oxidation reaction takes place at the optimal temperature, improving reaction efficiency and wastewater treatment effect. Simultaneously, the pH sensor 14 monitors the pH value within the ozone reaction tower 1 in real time and feeds the data back to the control system. When the pH value deviates from the set range, the control system activates the automatic acid / alkali material addition device 15 to add an appropriate amount of acid / alkali material to the ozone reaction tower 1 to adjust the pH value to the optimal range. This automated pH adjustment ensures that the oxidation reaction takes place in the optimal acid / alkali environment, further improving reaction efficiency. During the oxidation reaction, ozone and hydrogen peroxide, under the action of the ozone catalytic packing layer 5, generate highly oxidizing hydroxyl radicals. These hydroxyl radicals non-selectively attack organic pollutants in the wastewater, directly mineralizing them into inorganic substances or converting them into low-toxicity, easily biodegradable intermediate products. This process not only removes organic pollutants but also removes nitrites, suspended solids, and decolorizes, deodorizes, and sterilizes. The exhaust gas after the reaction is discharged through exhaust gas pipe 17. Before discharge, the exhaust gas treatment device 18 purifies the exhaust gas to remove harmful substances, ensuring that the exhaust gas emissions meet environmental protection requirements. Furthermore, the solenoid valve A on the wastewater transport pipe 9 and the solenoid valve B between the inlet 19 and the intermediate tank 3 enable automated control of wastewater transport and inlet.

[0034] Based on the preferred embodiments of this utility model described above, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. An ozone advanced oxidation deep wastewater treatment device, characterized in that: It includes an ozone reaction tower (1), a secondary sedimentation tank (2), an intermediate tank (3), a high-speed dissolved air device (4) and an ozone catalytic packing layer (5). The high-speed dissolved air device (4) is equipped with a hydrogen peroxide inlet (6) for introducing hydrogen peroxide, and the high-speed dissolved air device (4) is equipped with an ozone input pipe (7) for introducing ozone. The secondary sedimentation tank (2), intermediate tank (3) and high-speed dissolved air device (4) are connected to each other in sequence through pipelines, and the ozone catalytic packing layer (5) is set inside the ozone reaction tower (1); A mixing and releasing device (8) is installed between the high-speed dissolved air device (4) and the ozone input pipe (7). The mixing and releasing device (8) is used to release ozone into the wastewater in the form of tiny bubbles smaller than 100 μm. The high-speed dissolved air device (4) is used to mix ozone, reflux wastewater and hydrogen peroxide evenly. The high-speed dissolved air device (4) is set inside the ozone reaction tower (1). The high-speed dissolved air device (4) is equipped with a wastewater transport pipe (9). The wastewater transport pipe (9) is used to transport the mixed wastewater to the bottom of the ozone reaction tower (1).

2. The ozone-based advanced oxidation deep wastewater treatment device according to claim 1, characterized in that: The ozone reaction tower (1) is equipped with a temperature sensor (10) for real-time detection of the reaction temperature and a temperature control device (11) for regulating and controlling the reaction environment temperature.

3. The ozone-based advanced oxidation deep wastewater treatment device according to claim 2, characterized in that: The temperature control device (11) includes a steam heating device (12) for heating and a water cooling device (13) for cooling.

4. The ozone-based advanced oxidation deep wastewater treatment device according to claim 1, characterized in that: The ozone reaction tower (1) is equipped with a pH sensor (14) and an automatic acid and alkali material addition device (15).

5. The ozone-based advanced oxidation deep wastewater treatment device according to claim 1, characterized in that: The wastewater transport pipeline (9) is equipped with valve A (16), which is a solenoid valve.

6. The ozone advanced oxidation deep wastewater treatment device according to claim 1, characterized in that: The top of the ozone reaction tower (1) is provided with a tail gas emission pipe (17) for discharging the tail gas after the reaction, and a tail gas treatment device (18) is provided on the tail gas emission pipe (17).

7. The ozone advanced oxidation deep wastewater treatment device according to claim 1, characterized in that: The ozone reaction tower (1) is provided with an inlet (19) and an outlet (20). The inlet (19) is connected to the intermediate pool (3) by a pipe. A valve B (21) is provided on the pipe between the inlet (19) and the intermediate pool (3). The valve B (21) is a solenoid valve.

8. The ozone advanced oxidation deep wastewater treatment device according to claim 1, characterized in that: The secondary sedimentation tank (2) is the secondary sedimentation tank of the wastewater treatment system of the paper mill.

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