A device and method for collaboratively removing and solidifying hydrogen peroxide and organic matter

Abstract

The present invention discloses a device and method for the coordinated removal and solidification of hydrogen peroxide and organic matter, comprising a water inlet assembly, a radar level gauge, an online COD analyzer, an online hydrogen peroxide detector, a variable frequency fan, a low-speed disc assembly, a floating row fixing rod, a floating row stopper, a floating row device, a floating row hose, a control center, a diffuser membrane disc, and a solidification decomposition tank. In the reaction system of the present invention, a filler acts as a catalyst to accelerate the decomposition of hydrogen peroxide. The filler itself is essentially non-consumable and does not form new pollutants, saving the cost of using reagents and the cost of sludge treatment. Organic pollutants in wastewater are degraded by the combined action of the filler, excess hydrogen peroxide, and the diffuser. While removing excess hydrogen peroxide, the oxidizing properties of hydrogen peroxide are fully utilized to remove organic matter and achieve the purpose of water purification.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen peroxide wastewater treatment, and in particular to a device and method for collaboratively removing and solidifying hydrogen peroxide and organic matter. Background Art

[0002] Hydrogen peroxide possesses extremely strong oxidizing properties due to the presence of peroxide bonds. Its relatively low production cost makes it widely used in the chemical, food, pharmaceutical, papermaking, textile, photovoltaic, and semiconductor industries, generating large amounts of industrial wastewater containing hydrogen peroxide. In recent years, with the increasing requirements for industrial wastewater discharge in my country and the development of water treatment technologies, advanced oxidation technologies using hydrogen peroxide as an aqueous activating group have also been widely used in wastewater treatment. Most of these advanced oxidation technologies require a high-concentration hydrogen peroxide wastewater treatment environment. This process often results in excessive hydrogen peroxide, resulting in residual hydrogen peroxide wastewater. This residual hydrogen peroxide is toxic to microorganisms and has a negative impact on subsequent wastewater biochemical treatment, requiring timely and effective removal.

[0003] There are two traditional methods for treating excess hydrogen peroxide. One involves using alkaline substances such as sodium hydroxide and potassium hydroxide, but this method produces large amounts of alkaline wastewater, causing serious environmental pollution. The other involves the use of chemical agents such as hydrogen peroxide decomposers and oxidizers. However, this method carries high reagent costs and increases the salt or metal ion content of the reaction products, which can easily lead to secondary pollution. Both methods target hydrogen peroxide as the pollutant to be treated, resulting in high treatment costs. How to effectively utilize the oxidizing properties of hydrogen peroxide to economically address excess hydrogen peroxide pollution is a pressing issue in the modern water treatment industry.

[0004] Conventional methods for treating organic pollutants mainly include: coagulation and sedimentation, advanced oxidation method, biochemical method, physical adsorption method and membrane filtration method. Among them, advanced oxidation method is more widely used in the pretreatment and deep treatment of high-concentration organic wastewater, but the H2O2 utilization efficiency is generally low, and there is still 20-100 mg / L of residual H2O2 in the effluent, and the COD organic matter removal rate does not exceed 40%.

[0005] The present invention proposes a new solution for hydrogen peroxide industrial wastewater, including a novel hydrogen peroxide solidification and decomposition tank. No dosing is required, and there is almost no loss of composite solidified filler during the reaction process, resulting in low wastewater operation costs. The reaction products, such as H2O, O2, and CO2, are harmless to the environment and can synergistically remove organic matter with an efficiency of 50%.

[0006] The present invention designs a novel catalytic reaction device, which includes: a water inlet pump valve component, a frequency conversion gas dispersion component, a floating drainage component, a solidification and decomposition component, and an online monitoring and automatic control component.

[0007] By setting up a solidification decomposition pool including: composite solidification filler, low-speed impeller, central transmission shaft and motor, adding new filler in the impeller, installing an automatic gas diffusion device, a control program center and an online detection system, the purpose of removing residual hydrogen peroxide in wastewater and co-treating organic pollutants in wastewater can be achieved. Summary of the Invention

[0008] Purpose of the invention: In order to overcome the disadvantages of the prior art of accelerating the decomposition rate of hydrogen peroxide by adding alkali or chemical agents, forming hydrogen and oxygen that escape from the wastewater, excessive addition of agents to produce high-salt sludge, resulting in large-scale consumption of agents, high costs and secondary pollution, in the chemical reaction of the traditional treatment method, hydrogen peroxide is consumed as a reactant, and its oxidizing properties are not reasonably utilized, which is not in line with the current policy of saving emissions and resource utilization of water treatment technology. The present invention provides a device and method for the synergistic removal and solidification of hydrogen peroxide and organic matter, which does not require the addition of chemical agents, has zero material consumption and can be reused, and at the same time maximizes the use of hydrogen peroxide's oxidative properties to synergistically remove organic matter in wastewater. It is a harmless and resource-based treatment method for hydrogen peroxide.

[0009] Technical solution: To achieve the above purpose, the technical solution adopted by the present invention is:

[0010] A device for the coordinated removal and solidification of hydrogen peroxide and organic matter, comprising a water inlet assembly, a radar level gauge, an online COD analyzer, an online hydrogen peroxide detector, a variable frequency fan, a low-speed wheel assembly, a floating row fixing rod, a floating row limiter, a floating row device, a floating row hose, a control center, a diffuser membrane disc, a solidification decomposition tank, and a power cabinet, wherein:

[0011] The water outlet end of the water inlet assembly is located above the solidification and decomposition tank, and the radar level meter, online COD analyzer, and online hydrogen peroxide detector are installed on the solidification and decomposition tank.

[0012] The low-speed wheel assembly is arranged in the solidification decomposition tank and filled with a composite solidification filler. The lowest end of the wheel of the low-speed wheel assembly is immersed in the water of the solidification decomposition tank, while the highest end of the wheel of the low-speed wheel assembly is located on the water surface of the solidification decomposition tank.

[0013] The diffuser membrane disc is arranged at the bottom of the solidification and decomposition tank, and the variable frequency fan is connected to the diffuser membrane disc through an air pipeline, and the air pipeline is provided with an air duct valve.

[0014] The floating row fixing rod is installed at the water outlet side of the bottom of the solidification and decomposition tank. The floating row fixing rod is sequentially provided with a floating row device and a floating row stopper from top to bottom, and the floating row stopper is lower than the lowest end of the low-speed wheel assembly. The floating row device is connected to the drainage pipe of the solidification and decomposition tank.

[0015] The control center is connected to the online COD analyzer, the online hydrogen peroxide detector, the variable frequency fan, and the low-speed wheel motor respectively.

[0016] A method for collaboratively removing hydrogen peroxide and organic matter comprises the following steps:

[0017] Step 1: Wastewater enters the top of the solidification and decomposition tank through the water inlet assembly.

[0018] Step 2: The radar level meter monitors the liquid level in the pool, the online COD analyzer obtains the organic matter COD concentration in real time, and the online hydrogen peroxide detector monitors the hydrogen peroxide concentration in the pool.

[0019] Step 3: The control center controls the speed of the variable frequency fan and the speed of the low-speed wheel motor according to the COD concentration of organic matter and the hydrogen peroxide concentration.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The filler in the reaction system acts as a catalyst to accelerate the decomposition of hydrogen peroxide. The filler itself is basically not consumed and no new pollutants are formed, saving the cost of using reagents and the cost of sludge treatment.

[0022] 2. Organic pollutants in the wastewater will be degraded under the combined action of the filler, residual hydrogen peroxide and the gas diffuser. While removing the residual hydrogen peroxide, the oxidizing properties of hydrogen peroxide are fully utilized to remove organic matter and achieve the purpose of water purification.

[0023] 3. Realize automatic control of the entire reaction system based on the control program center and the corresponding detection system. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Schematic diagram of the structure of the device for the coordinated removal and solidification of hydrogen peroxide and organic matter.

[0025] Figure 2 This is a front schematic diagram of the device for the coordinated removal and solidification of hydrogen peroxide and organic matter.

[0026] Figure 3 This is a side schematic diagram of the device for the coordinated removal and solidification of hydrogen peroxide and organic matter.

[0027] In the figure, 1-water inlet pump, 2-automatic water inlet valve, 3-water inlet pipe, 4-radar level gauge, 5-online COD analyzer, 6-online hydrogen peroxide detector, 7-frequency conversion fan, 8-air duct valve, 9-low-speed wheel assembly, 10-floating row fixing rod, 101-floating row limiter, 11-floating row device, 12-floating row hose, 13-drainage electric valve, 14-drainage pipeline pump, 15-control center, 16-diffuser membrane plate, 17-solidification decomposition tank, 22-power cabinet. DETAILED DESCRIPTION

[0028] The present invention is further illustrated below with reference to the accompanying drawings and specific embodiments. It should be understood that these examples are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the present invention, modifications of various equivalent forms of the present invention made by those skilled in the art all fall within the scope defined by the claims attached to this application.

[0029] A device for the coordinated removal and solidification of hydrogen peroxide and organic matter, such as Figure 1-3 As shown, it includes a water inlet assembly, a radar level gauge 4, an online COD analyzer 5, an online hydrogen peroxide detector 6, a variable frequency fan 7, a low-speed wheel assembly 9, a floating row fixing rod 10, a floating row limiter 101, a floating row device 11, a floating row hose 12, a control center 15, a diffuser membrane plate 16, a solidification decomposition tank 17, and a power cabinet 22, wherein:

[0030] The water outlet end of the water inlet assembly is located above the solidification decomposition tank 17. The water inlet assembly includes a water inlet pump 1, an automatic water inlet valve 2, and a water inlet pipe 3. The water inlet pump 1 and the automatic water inlet valve 2 are installed on the water inlet pipe 3. The water inlet pump 1 is at the bottom of the solidification decomposition tank, and the water inlet pipe 3 is arranged along the side of the solidification decomposition tank 17. The water inlet pump 1 and the automatic water inlet valve 2 are arranged on the water inlet pipe 3 along the water flow direction, and the water outlet end of the water inlet pipe 3 is located above the solidification decomposition tank 17.

[0031] Three sets of fixed brackets are installed on the top of the solidification and decomposition tank 17. The radar level gauge 4, online COD analyzer 5, and online hydrogen peroxide detector 6 are mounted on the solidification and decomposition tank 17 via the fixed brackets. The radar level gauge 4 is mounted in a disc-type manner, the online COD analyzer 5 is a submersible sensor, and the online hydrogen peroxide detector is also a submersible sensor. The radar level gauge 4 is mounted in a disc-type manner above the liquid level in the solidification and decomposition tank, while the sensors of the online COD analyzer 5 and online hydrogen peroxide detector 6 are both immersed in the water in the solidification and decomposition tank 17.

[0032] The low-speed disc assembly 9 is positioned within the solidification and decomposition tank 17, with its bottom located 1 / 4 the height of the tank bottom and its top flush with the tank top. The disc of the low-speed disc assembly 9 is tilted 5-10 degrees from the water inlet to the water outlet of the solidification and decomposition tank 17. The low-speed disc assembly 9 is filled with a composite solidifying filler. The lowest end of the disc of the low-speed disc assembly 9 is submerged in the water of the solidification and decomposition tank 17, while the highest end of the disc is located above the water surface of the solidification and decomposition tank 17.

[0033] The low-speed disc assembly 9 includes a disc, a central transmission shaft, a low-speed disc motor, and a bracket. The bracket is fixedly mounted on the solidification decomposition tank 17. The disc is rotatably mounted on the bracket via the central transmission shaft. The low-speed disc motor is in transmission connection with the central transmission shaft. The disc is woven from a fine steel mesh with crisscrossing inner and outer surfaces. The inner mesh is provided with several steel wire connectors fixed to the central transmission shaft. The disc is filled with a composite solidified filler. Two sets of discs are mounted on a central shaft. The discs are tilted 5-10° from the water inlet to the water outlet of the solidification decomposition tank (i.e., the low-speed disc assembly 9 is tilted 5-10° to the horizontal). The composite solidified filler is a mixture of MnO2-AC particles and Mn3O4-AC particles, with a mass ratio of 3:0.8-1.2.

[0034] The low-speed wheel assembly 9 is set to a rotation rate of 0.5-1r / h and a vibration frequency of 10Hz. It is wrapped with a 0.5mm wire mesh and is provided with two groups. The low-speed wheel assembly 9 is provided with a variable frequency motor at a high position on one inclined end. The motor control is connected to the control program center. According to the program setting, the specified transmission signal is output to control the corresponding rotation frequency. The low-speed wheel assembly 9 adopts a two-stage motor. The motor is set on a fixed bracket above the wheel. The wheel can rotate along the central axis and can also oscillate up and down in the vertical direction. The central transmission axis of the low-speed wheel assembly 9 is inclined at 5-10° to the horizontal plane and vibrates slightly during rotation. The upper part of the composite solidified filler in the wheel is above the liquid level, and the lower part is immersed below the liquid level. The water adhered to the filler in the non-submerged part of the wheel slides down the inclined slope and falls into the pool. The part that penetrates into the water is more fully contacted with the wastewater due to the vibration of the wheel, which promotes the uniform occurrence of the catalytic oxidation reaction. The rotating wheel is wrapped with 0.5mm wire mesh, and the fine steel mesh on the inside and outside is crisscrossed. The inner mesh is equipped with several steel wire connectors fixed to the central transmission shaft, and the composite solidified filler is filled in the low-speed wheel device.

[0035] The low-speed disc assembly 9 is located within the solidification decomposition tank, with the disc bottom positioned 1 / 4 the height of the tank floor and the disc top flush with the tank ceiling. A central transmission shaft is located at the center of the low-speed disc assembly, with two discs mounted on this shaft. The motor is connected to the disc bracket, located higher on the left side.

[0036] The filler in the low-speed disc assembly 9 is pretreated manganese dioxide and manganese tetraoxide particles. The manganese dioxide particles and activated carbon are crushed and mixed at a mass ratio of 1:1. Fly ash and water are added to the manganese dioxide and activated carbon powder mixture at a ratio of 0.6-1.4g / L. After stirring evenly, the mixture is centrifuged at 5000r. After removing the supernatant, the remaining mixture is calcined at 360°C for 3h to form MnO2-AC particles. The particles with a particle size greater than 1mm are then screened through a 1mm sieve.

[0037] Manganese oxide granules and activated carbon are crushed and mixed in a 1:1 mass ratio. Fly ash and water are added to the mixture at a ratio of 0.6-1.4g / L. After stirring, the mixture is centrifuged at 5000r. After removing the supernatant, the remaining mixture is calcined at 360°C for 3h to form Mn3O4-AC granules. Particles larger than 2mm are then screened through a 2mm sieve. The screened MnO2-AC granules and Mn3O4-AC granules are added, mixed and sieved at a mass ratio of 3:1, and placed in a rotating disc packing device.

[0038] The MnO2-AC / Mn3O4-AC fillers used can serve as catalysts and activators for the reaction system. First, the MnO2-AC / Mn3O4-AC carrier catalyzes the decomposition rate of hydrogen peroxide. Manganese oxides react with hydrogen peroxide to form unstable high-oxygen manganese compounds, which then decompose into manganese oxides and oxygen. The amount of MnO2-AC / Mn3O4-AC carrier remains unchanged throughout the entire process. Second, the MnO2-AC / Mn3O4-AC carrier activates the reaction to generate superoxide anions, which in turn generate active oxygen groups, primarily hydroxyl radicals. These can promote the oxidative decomposition of organic matter in wastewater and reduce the concentration of organic pollutants in the effluent.

[0039] The diffuser membrane trays 16 are evenly distributed across the bottom of the solidification and decomposition tank 17. The variable-frequency blower 7 is connected to the diffuser membrane trays 16 via an air line equipped with an air duct valve 8. The diffuser and agitator utilize a variable-frequency blower to supply air. The blower's control line is connected to the control program center. The blower's air volume is adjusted based on monitoring data for hydrogen peroxide and COD levels in the water. The control logic is based on the maximum air volume actually required for COD removal or hydrogen peroxide decomposition. The fan frequency is set to a minimum and maximum frequency of 30-50 Hz, respectively. The diffuser connected to the blower utilizes a Ø260 diffuser membrane tray.

[0040] The floating row fixing rod 10 is arranged at the water outlet side of the bottom of the solidification decomposition tank 17. The floating row fixing rod 10 is provided with a floating row device 11 and a floating row limiter 101 in sequence from top to bottom, and the floating row limiter 101 is lower than the lowest end of the low-speed wheel assembly 9. The floating row limiter 101 is located below the floating row device 11 and is 400mm lower than the bottom of the low-speed wheel assembly 9. The lower limit of the height of the floating row device is 400mm vertically from the lower part of the wheel device, and the upper limit is 600mm from the top of the tank. The bottom of the floating row device 11 (the specification of the floating row device 11 is φ650×400) is connected to the floating row hose 12, and the floating row hose 12 is connected to the drainage pipe of the solidification decomposition tank 17. The drainage pipe is provided with a drainage electric valve 13 and a drainage pipe pump 14.

[0041] The control center 15 is connected to the online COD analyzer 5, the online hydrogen peroxide detector 6, the variable frequency fan 7, the low-speed disc motor, the drain electric valve 13, and the drain pipe pump 14. The control center 15 receives online monitoring data, and the control program center outputs control instructions based on the set program logic. These instructions are implemented through control circuits connected to various devices and valves, including: the low-speed disc assembly 9 control circuit, which controls the disc rotation speed based on the hydrogen peroxide concentration; the drainage system control line; the variable frequency fan control line, which connects to the fan frequency control line; and the water inlet pump control line, which stops the pump when the liquid level is high. The control center 15 is connected to the low-speed disc assembly motor control line, the drainage system control line, the variable frequency fan control line, and the water inlet pump control line to achieve automated control. The control center 15 is equipped with an alarm device to issue an alarm if critical values ​​occur during the water treatment process.

[0042] A power cabinet 22 is separately provided for the power supply lines of all electromechanical equipment. The power cabinet 22 is connected to the power supply lines, which are respectively connected to the power control lines of the water pump (water inlet pump 1, drainage pipe pump 14), fan 7 and low-speed wheel assembly 9.

[0043] The hydrogen peroxide and COD monitoring data is obtained via an online hydrogen peroxide detector and an online COD analyzer, and transmitted to the control program center. The monitoring system also incorporates a liquid level monitoring system, which links the hydrogen peroxide concentration to the liquid level, thereby controlling the effective water depth within the solidification and decomposition tank. The system's reaction residence time is directly linked to the liquid level monitoring data.

[0044] In order to realize the automation of the liquid level and reaction residence time control, a floating drainage device is set up, and the opening and closing of the drainage electric valve and the drainage pipeline pump are controlled by the control program center program. The upper and lower limits of the liquid level in the solidification decomposition tank are set, and the highest and lowest control are achieved by the floating row limiter on the floating row fixed rod. The control program center obtains the liquid level data and makes corresponding control instructions, which is linked to the actual water quality, so as to realize the control of the opening and closing of the drainage electric valve and the drainage pipeline pump.

[0045] The upper and lower limits of the water level are defined by the float limiter. The lower limit is 400mm vertically away from the bottom of the low-speed wheel device; the upper limit is 600mm vertically away from the top of the low-speed wheel device.

[0046] The control center is equipped with an alarm device to issue an alert if a critical value is reached during the processing process. The control center sets the water inlet critical value to 100mg / L of hydrogen peroxide concentration. If this value is exceeded, the water inlet pump and automatic water inlet valve will be shut down, stopping the water inlet.

[0047] In the continuous water inflow mode, the drainage critical value of the control program center is set to 10mg / L of hydrogen peroxide concentration. When the concentration is lower than the critical value, the drainage electric valve and the drainage pipe pump are opened. When the online hydrogen peroxide detector obtains a real-time hydrogen peroxide concentration value higher than 10mg / L, the program control delay is 2s, the drainage pump valve is automatically closed, and the float device rises along the float fixed rod with the rising liquid level until the liquid level reaches the upper limit of the water level, and the program controls the water inlet pump valve to stop running; when low concentration (H2O2 < 10mg / L) water is continuously inflowed, the drainage pump valve is automatically opened, and the water level drops. After the water is drained to the lower limit of the water level, the aeration stirring is continued for 3-5min, and the wheel is turned on to oscillate up and down to blow off the water adhering to the wheel. After the drainage and drying of the filler are completed, the drainage pump valve is closed.

[0048] A method for collaboratively removing hydrogen peroxide and organic matter comprises the following steps:

[0049] Step 1: Wastewater enters the top of the solidification and decomposition tank through the water inlet assembly.

[0050] Step 2: The radar level meter monitors the liquid level in the pool, the online COD analyzer obtains the organic matter COD concentration in real time, and the online hydrogen peroxide detector monitors the hydrogen peroxide concentration in the pool.

[0051] Step 3: The control center controls the speed of the variable frequency fan and the speed of the low-speed wheel motor according to the COD concentration of organic matter and the hydrogen peroxide concentration.

[0052] 1. Control of hydrogen peroxide:

[0053] 1) When the online hydrogen peroxide detector 6 monitors a hydrogen peroxide concentration between 0 and 10 mg / h, the control center 15 controls the frequency of the variable-frequency fan 7 at 30 Hz and the speed of the low-speed disc assembly 9 at 0.5 rpm. When the liquid level reaches the lower limit of the float drain, the wastewater discharge procedure is executed, the drain electric valve and the drain pipe pump are turned on, and when the liquid level reaches the lower limit of the float drain, drainage is stopped. (The flow rate of the drain pipe pump is greater than the inlet flow rate.)

[0054] 2) Using a rapid test strip, the hydrogen peroxide concentration at the outlet of the solidification decomposition tank is obtained, and then the hydrogen peroxide removal rate is calculated. Based on the optimal hydrogen peroxide removal rate, a characteristic curve of the change in hydrogen peroxide concentration at the water inlet and the fan control frequency is established. When the online hydrogen peroxide detector 6 monitors the hydrogen peroxide concentration between 10-50 mg / h, the control center 15 controls and adjusts the corresponding parameters according to the following characteristic curve: The relationship between the speed of the variable frequency fan and the hydrogen peroxide concentration is as follows:

[0055] Y f =1.35e^(-C1 / -17.74)+27.69

[0056] Among them, Y fIndicates the fan frequency when only the hydrogen peroxide concentration is considered. This value is the fan frequency when hydrogen peroxide is controlled alone. C1 represents the hydrogen peroxide concentration.

[0057] The control center 15 can be controlled according to the parameters in Table 1.

[0058] Table 1 Fan frequency and hydrogen peroxide concentration control parameters

[0059]

[0060] In addition, the relationship between the speed of the low-speed wheel motor and the concentration of hydrogen peroxide is as follows:

[0061]

[0062] Among them, F2 represents the frequency of the low-speed wheel motor, and C1 represents the concentration of hydrogen peroxide.

[0063] That is, when C1≤30mg / L, the wheel rotation rate F2=0.5r / h; when C1>30mg / L, the wheel rotation rate F2=1.0r / h.

[0064] The program system does not drain water. When the liquid level rises to the upper limit, water intake is stopped. When the online hydrogen peroxide detector 6 monitors that the hydrogen peroxide concentration is greater than 50 mg / h, water intake is stopped. To prevent frequent activation of the electrode, the online hydrogen peroxide detector 6 monitors that the hydrogen peroxide concentration is less than 25 mg / h before water intake is started again.

[0065] 2. Synergistic removal of organic pollutants

[0066] On the basis of hydrogen peroxide control, the online COD analyzer 5 and the online hydrogen peroxide detector 6 monitoring data are combined, and the control method process is as follows:

[0067] 1) When the COD data monitored by the online COD analyzer 5 is between 0 and 100 mg / L, the control center 15 controls the frequency of the variable frequency fan 7 to 30 Hz. If the liquid level reaches the lower limit of the float drain, the wastewater discharge procedure is executed, and the electric drain valve and drainage pipeline pump are opened. When the liquid level reaches the lower limit of the float drain, drainage stops.

[0068] 2) When the COD data monitored by the online COD analyzer 5 is greater than 100 mg / L, the control center 15 combines the hydrogen peroxide concentration control logic. The specific relationship between the speed of the variable frequency fan and the hydrogen peroxide concentration and the organic matter COD concentration is as follows:

[0069] Y f =1.35e^(-C1 / -17.74)+27.69

[0070] Among them, F1 represents the frequency of the variable frequency fan, that is, the COD associated control fan frequency value F (unit Hz), Y f Indicates the fan frequency when only the hydrogen peroxide concentration is considered, C1 indicates the hydrogen peroxide concentration (unit: mg / L), and C2 indicates the organic matter COD concentration (unit: mg / L).

[0071] The fan frequency conversion system control can be adjusted according to the monitoring data of hydrogen peroxide and COD in water. The preferred order of adjustment is to select the maximum parameter of the two parameters first based on the actual amount required to remove COD or decompose hydrogen peroxide in the embodiment.

[0072] The low-speed disc assembly uses a variable-frequency motor. The motor control is interlocked with the control program center, adjusting the rotation frequency according to the corresponding transmission signal. The low-speed disc assembly is tilted 10° from the horizontal and has a rotational vibration function. The rotating disc is covered with a 0.5mm wire mesh.

[0073] This invention features an integrated solidification and decomposition tank. The low-speed disc assembly features a rotating mechanism that allows 360-degree rotation to react with the hydrogen peroxide wastewater. The disc is divided into an inlet reaction section and an outlet section, which rotate alternately. The tilted arrangement allows residual water in the outlet section to flow into the tank, facilitating rapid drying of the filler, restoring its processing capacity, and increasing the reaction capacity and efficiency of the entire system. The low-speed disc also features an oscillating mechanism, ensuring deeper contact between the wastewater and the filler, enabling a more complete decomposition reaction.

[0074] The liquid level automatic control system of the present invention, through the coordinated action of the float and the float limiter, links the liquid level of the solidification decomposition tank, controls the opening and closing of the water inlet pump and the drainage pump, and regulates the processing load of the entire device, which can be adapted to the situation and reduce unnecessary loss of composite solidification filler; at the same time, the automatic control program combines the float limiter with the control of the diffuser membrane disk, quickly blows the filler with air, can restore the decomposition channel of the composite solidification filler, increase the effective specific surface area of ​​the filler, and is conducive to increasing the adsorption and decomposition capacity of the filler, thereby improving the reaction efficiency.

[0075] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A device for collaborative removal and solidification of hydrogen peroxide and organic matter, characterized in that: include: The water outlet of the water inlet assembly is located above the solidification and decomposition tank. The radar level meter, online COD analyzer, and online hydrogen peroxide detector are installed on the solidification and decomposition tank. The low-speed wheel assembly is arranged in the solidification decomposition tank, and the low-speed wheel assembly is filled with a composite solidification filler; the lowest end of the wheel of the low-speed wheel assembly is immersed in the water of the solidification decomposition tank, and the highest end of the wheel of the low-speed wheel assembly is located on the water surface of the solidification decomposition tank; The diffuser membrane disc is installed at the bottom of the solidification decomposition tank. The variable frequency fan is connected to the diffuser membrane disc through an air pipeline, and the air pipeline is equipped with an air duct valve. The floating row fixing rod is set at the water outlet side of the bottom of the solidification decomposition tank. The floating row fixing rod is sequentially provided with a floating row device and a floating row limiter from top to bottom, and the floating row limiter is lower than the lowest end of the low-speed wheel assembly; the floating row device is connected to the drainage pipe of the solidification decomposition tank; The control center is connected to the online COD analyzer, online hydrogen peroxide detector, variable frequency fan, and low-speed wheel motor respectively; The online COD analyzer obtains the organic matter COD concentration in real time, and the online hydrogen peroxide detector monitors the hydrogen peroxide concentration in the pool; the control center controls the speed of the variable frequency fan and the speed of the low-speed wheel motor based on the organic matter COD concentration and hydrogen peroxide concentration; The relationship between the speed of the variable frequency fan and the concentration of hydrogen peroxide and organic matter COD is as follows: in, Indicates the frequency of the variable frequency fan. Indicates the fan frequency when only the hydrogen peroxide concentration is considered. Indicates the concentration of hydrogen peroxide, Indicates the COD concentration of organic matter; The relationship between the speed of the low-speed wheel motor and the concentration of hydrogen peroxide is as follows: in, Indicates the frequency of the low-speed wheel motor, Indicates the concentration of hydrogen peroxide.

2. The device for collaboratively removing and solidifying hydrogen peroxide and organic matter according to claim 1, characterized in that: The low-speed wheel assembly includes a wheel, a low-speed wheel motor, and a bracket. The bracket is fixedly installed on the solidification decomposition tank. The wheel is rotatably installed on the bracket through the central transmission shaft. The low-speed wheel motor is connected to the central transmission shaft. The wheel is woven from fine steel wire mesh crisscrossed inside and outside, and composite solidification filler is filled in the wheel.

3. The device for collaboratively removing and solidifying hydrogen peroxide and organic matter according to claim 2, characterized in that: The radar level meter is installed in a disc-type manner and fixed above the water surface of the solidification and decomposition tank; the sensors of the online COD analyzer and the online hydrogen peroxide detector are both immersed in the water of the solidification and decomposition tank.

4. The device for collaboratively removing and solidifying hydrogen peroxide and organic matter according to claim 3, characterized in that: The wheel of the low-speed wheel assembly is inclined 5-10 degrees from the water inlet end to the water outlet end of the solidification decomposition tank.

5. The device for collaboratively removing and solidifying hydrogen peroxide and organic matter according to claim 4, characterized in that: The bottom of the float drain is connected to the float hose, which is connected to the drainage pipe of the solidification decomposition tank. The drainage pipe is provided with a drainage electric valve and a drainage pipe pump; the control center is connected to the drainage electric valve and the drainage pipe pump respectively.

6. The device for collaboratively removing and solidifying hydrogen peroxide and organic matter according to claim 5, characterized in that: The water inlet assembly includes a water inlet pump, an automatic water inlet valve, and a water inlet pipe. The water inlet pump and the automatic water inlet valve are installed on the water inlet pipe, and the water inlet pump and the automatic water inlet valve are arranged on the water inlet pipe along the direction of water flow. The outlet end of the water inlet pipe is located above the solidification decomposition tank.

7. The device for collaboratively removing and solidifying hydrogen peroxide and organic matter according to claim 6, characterized in that: The composite solidified filler is a mixture of MnO2-AC particles and Mn3O4-AC particles, and the mass ratio of the MnO2-AC particles to the Mn3O4-AC particles is 3:0.8-1.

2.

8. A coordinated removal and curing method of hydrogen peroxide and organic matter based on the coordinated removal and curing device of claim 1, characterized in that: The following steps are involved: Step 1: wastewater enters the top of the solidification and decomposition tank through the water inlet assembly; Step 2: The radar level gauge monitors the liquid level in the pool, the online COD analyzer obtains the organic matter COD concentration in real time, and the online hydrogen peroxide detector monitors the hydrogen peroxide concentration in the pool; Step 3: The control center controls the speed of the variable frequency fan and the speed of the low-speed wheel motor according to the COD concentration of organic matter and the hydrogen peroxide concentration.

9. The collaborative desolidification method according to claim 8, characterized in that: Before the liquid level reaches the lowest limit of the float drain, the wastewater discharge procedure is executed, the drainage electric valve and the drainage pipeline pump are opened, and the drainage is stopped when the liquid level reaches the lower limit of the float drain.

Images