WO2021047048A1 - System and method for treating industrial sludge by micro-interface enhanced wet oxidation method - Google Patents

Abstract

A system and method for treating industrial sludge by a micro-interface enhanced wet oxidation method, comprising: a reaction kettle (1). The reaction kettle (1) is provided with an industrial sludge inlet (101), a reaction product outlet (103) of the reaction kettle (1) is communicated with a material cooling inlet of a cooler (6) by means of a pipeline (51), and an air inlet (102) of the reaction kettle (1) is connected to an air intake duct (3). A micro-interface generator (2) is also provided in the reaction kettle (1), the micro-interface generator (2) is provided on an inner wall of the reaction kettle (1), and the micro-interface generator (2) is provided near the air inlet (102) and is communicated with the air intake duct (3).

Description

System and method for treating industrial sludge with micro-interface enhanced wet oxidation method Technical field

The present invention generally relates to the technical field of resources and environment, and more specifically relates to a system and method for treating industrial sludge with a micro-interface-enhanced wet oxidation method.

Background technique

In recent years, my country's medicine, papermaking, printing and dyeing, petrochemical and other industries have developed rapidly. While this provides protection for people's normal life, it also brings environmental problems such as industrial wastewater. At present, industrial wastewater is mostly treated by various biological methods based on the activated sludge method, and a large amount of surplus sludge will be produced during the treatment process. The composition of industrial sludge is extremely complex, containing a large amount of difficult-to-degrade organic matter, heavy metals, salts and other substances. In addition, the sludge of certain industries (such as the pharmaceutical industry) contains a large number of drug-resistant microorganisms. If they accidentally enter the natural environment, they will bring huge risks to the ecological environment. Combining the above characteristics, the vast majority of industrial sludge is recognized as hazardous waste in my country. Therefore, companies need to pay high treatment costs and hand over the sludge to a professional hazardous waste treatment unit for final disposal.

In order to reduce the transport volume of industrial sludge and reduce the cost of sludge disposal, companies generally pre-treat the sludge in the plant to reduce the content of organic matter in the sludge and improve the dewatering performance of the sludge. At present, the technology of treating industrial sludge with wet oxidation method is widely used. The wet oxidation method can completely decompose the organic matter in the sludge, thereby reducing the solid content in the sludge. At the same time, the method can also greatly improve the dewatering performance of industrial sludge. However, the composition of industrial sludge is complex and often needs to be carried out at a higher reaction temperature and reaction pressure. Excessively high reaction pressure not only increases the production cost, but also reduces the safety of the device. Therefore, a system and method for treating industrial sludge with enhanced micro-interface wet oxidation is needed to at least partially solve the above problems.

Summary of the invention

A series of simplified concepts are introduced in the content of the invention, which will be described in further detail in the detailed implementation section. The inventive content part of the present invention does not mean an attempt to limit the key features and necessary technical features of the claimed technical solution, nor does it mean an attempt to determine the protection scope of the claimed technical solution.

In order to at least partially solve the above technical problems, on the one hand, the present invention provides a micro-interface-enhanced wet oxidation method for treating industrial sludge, which is characterized in that it includes:

A reactor, the reactor is provided with a gas inlet, an industrial sludge inlet and a reaction product outlet;

A micro-interface generator, the micro-interface generator is arranged on the inner wall of the reaction kettle, and the micro-interface generator is arranged near the gas inlet;

An air inlet pipe, the air inlet pipe is connected to the gas inlet;

A cooler, the cooler includes a cooling water inlet, a cooling water outlet, a material cooling inlet, and a material cooling outlet, the material cooling inlet communicates with the reaction product outlet through a pipe; and

A three-phase separator comprising a material separation inlet, a gas phase product outlet, a liquid phase product outlet, and a solid phase product outlet, the material separation inlet being communicated with the material cooling outlet through a pipe; and

A control module, the control module includes a controller and a detection control element, the controller is electrically connected to the detection control element;

Wherein, the gas inlet pipe communicates with the micro-interface generator through the gas inlet, and the micro-interface generator is used to break the oxygen from the gas inlet into micron-level bubbles, and the diameter of the bubbles is greater than or equal to 1 μm And less than 1mm.

Further, the micro-interface generator is any one of a pneumatic micro-interface generator, a hydraulic micro-interface generator, or a gas-liquid linkage micro-interface generator.

Further, the detection control element includes:

A first flow pump, the first flow pump is arranged on a pipeline connected to the industrial sludge inlet to detect the flow of industrial sludge entering the reactor in real time;

A second flow pump, the second flow pump is arranged on the intake pipe to detect the flow of oxygen entering the reactor in real time;

A first pressure detecting element, the first pressure detecting element is arranged in the micro-interface generator to measure the real-time pressure value in the micro-interface generator; and

The second pressure detecting element is arranged in the reaction kettle to measure the real-time pressure value in the reaction kettle.

Further, the reaction kettle is provided with at least one gas inlet, and at least one micro-interface generator is provided near each gas inlet to communicate with the gas inlet pipe.

Further, a stirring device is further included, and the stirring device includes a stirring rod arranged in the reaction kettle and a motor that drives the stirring rod to rotate.

On the other hand, the present invention also provides a method for treating industrial sludge with a wet oxidation method enhanced by micro-interfaces, the method comprising:

After mixing industrial sludge and catalyst, pass the industrial sludge inlet into the reactor;

Oxygen enters the micro-interface generator through the air inlet pipe, and the micro-interface generator breaks the oxygen into micron-level bubbles, and the bubbles and the industrial sludge form a gas-liquid emulsion, the gas-liquid emulsion A wet oxidation reaction occurs under the action of the catalyst;

The stirring rod is driven by the motor to perform stirring work to improve the reaction efficiency;

After the wet oxidation reaction, the industrial sludge enters a cooler for cooling, the cooled industrial sludge enters a three-phase separator for separation, and the separated solid sludge is discharged from the solid phase product outlet;

The controller respectively receives the industrial sludge flow rate of the first flow pump and the oxygen flow rate of the second flow pump. The controller sets the reference pressure P0 in the micro-interface generator, the oxygen reference flow rate Q10, and the industrial sludge reference flow rate Q20, The reference flow rate of industrial sludge is determined by comparing the real-time pressure value P in the micro-interface generator with the reference pressure P0. By adjusting the first flow pump, the oxygen flow rate Q1 detected in real time is consistent with the reference oxygen flow rate Q10.

Further, the water content of the industrial wastewater is above 94%.

Further, the catalyst includes at least one of activated carbon, metal cations, or a composite composed of activated carbon and metal cations.

Further, the reaction conditions of the wet oxidation reaction are:

Reaction temperature: 100-150℃;

The initial pressure of the reactor: 0.5-1.5MPa;

Reaction pressure: 0.5-1MPa;

Reaction time: 20-60min.

Further, the cooler cools the industrial sludge to below 100° C. and then injects the industrial sludge into the three-phase separator.

The beneficial effects of the present invention are: the micro-interface generator breaks the oxygen bubbles into micron-level bubbles, thereby increasing the area of the phase boundary between the gas phase and the liquid phase, so that the oxygen gas can better interact with industrial sludge. The phase dissolves to form a gas-liquid emulsion, which reduces the pressure of the reaction.

Specifically, when the oxygen gas enters the micro-interface generator, the micro-interface generator will break the gas into bubbles with a diameter greater than or equal to 1 nm or 1 μm, that is, the micro-interface generator can pass the gas flow or the diameter into the reactor The centimeter-level and millimeter-level bubbles are broken into several micron-level bubbles; the total surface area of the gas entering the reactor is significantly increased, thereby increasing the contact area between the gas and the industrial sludge; therefore, in the same time , There are more gases that react with free radicals in industrial sludge, which has the effect of accelerating the reaction rate;

On the other hand, in the prior art, the reaction device needs to maintain a high pressure to force the bubbles to dissolve in the industrial sludge to cause an oxidation reaction. In the present invention, because the bubbles broken by the micro-interface generator and the industrial sewage The sludge phase is easier to dissolve, so it is no longer necessary to maintain a higher reaction pressure in the reactor, thereby reducing the energy consumption for maintaining a high-pressure state, and making the reaction device safer.

Description of the drawings

In order to make the advantages of the present invention easier to understand, the present invention briefly described above will be described in more detail by referring to specific embodiments shown in the accompanying drawings. It can be understood that these drawings only depict typical implementations of the present invention, and therefore should not be considered as limiting the scope of protection thereof, and the present invention is described and explained with additional characteristics and details through the accompanying drawings.

Fig. 1 is a schematic diagram of an embodiment of a system for treating industrial sludge with a micro-interface-enhanced wet oxidation method according to the present invention.

Description of reference signs:

1: Reactor 101: Import of industrial sludge

102: Gas import 103: Reaction product export

2: Micro-interface generator 3: Intake duct

4: Stirring device 401: Motor

402: Stirring rod 5: Pipeline

6: Cooler 61: Cooling water outlet

62: Cooling water inlet 7: Three-phase separator

71: Export of gas-phase products 72: Export of liquid-phase products

73: Export of solid phase products

detailed description

In the following description, a lot of specific details are given in order to provide a more thorough understanding of the present invention. However, it is obvious to those skilled in the art that the embodiments of the present invention can be implemented without one or more of these details. In other examples, in order to avoid confusion with the embodiments of the present invention, some technical features known in the art are not described.

In order to thoroughly understand the embodiments of the present invention, a detailed structure will be proposed in the following description. Obviously, the implementation of the embodiments of the present invention is not limited to the specific details familiar to those skilled in the art. The preferred embodiments of the present invention are described in detail as follows. However, in addition to these detailed descriptions, the present invention may also have other embodiments.

As shown in FIG. 1, it is a schematic diagram of an embodiment of the system for treating industrial sludge with micro-interface-enhanced wet oxidation method according to the present invention, wherein the reactor 1 is provided with an industrial sludge inlet 101, and the reactor 1 The reaction product outlet 103 of the reactor 1 is connected to the material cooling inlet of the cooler 6 through the pipe 51. The gas inlet 102 of the reactor 1 is connected with the gas inlet pipe 3; the reactor 1 is also provided with a micro-interface generator 2 for micro-interface generation The device 2 is arranged on the inner wall of the reactor 1, and the micro-interface generator 2 is arranged near the gas inlet 102 and communicates with the gas inlet pipe 3.

In the prior art, the oxygen from the intake pipe 3 may be broken into bubbles by other foaming devices, but the diameter of the bubbles varies in centimeters or millimeters, although it helps to speed up the reaction rate. But the effect is not obvious; in this embodiment, the micro-interface generator 2 can break the airflow or bubbles with diameters of centimeters and millimeters into several micrometers in the reactor 1 and the diameter of the bubbles Greater than or equal to 1μm and less than 1mm; the total surface area of the gas entering the reactor 1 is significantly increased, thereby increasing the contact area between the gas and the industrial sludge; therefore, in the same time, the free radicals in the industrial sludge More gases are reacted, which has the effect of accelerating the reaction rate;

In addition, in the prior art, the reactor 1 needs to maintain a high pressure to force the gas to dissolve in the industrial sludge to cause an oxidation reaction. In this embodiment, because the bubbles broken by the micro-interface generator 2 and the industrial It is easier for the sludge to dissolve with each other. Therefore, it is no longer necessary to maintain a high reaction pressure in the reactor 1 so that the energy consumption for maintaining the high pressure state is reduced, and the entire reaction system is safer.

Those skilled in the art can understand that the micro-interface generator 2 described in this embodiment can also be used in other multiphase reactions, such as through micro-interfaces, micro-nano interfaces, ultra-micro interfaces, micro-bubble biochemical reactors or Microbubble bioreactors and other equipment, using micro mixing, micro fluidization, ultra-micro fluidization, micro-bubble fermentation, micro-bubble bubbling, micro-bubble mass transfer, micro-bubble transfer, micro-bubble reaction, micro-bubble absorption, and micro-bubble increase Oxygen, microbubble contact and other processes or methods to make the material form multi-phase micro-mixed flow, multi-phase micro-nano flow, multi-phase emulsified flow, multi-phase micro-structure flow, gas-liquid-solid micro-mixed flow, gas-liquid-solid micro-nano flow, gas Liquid-solid emulsified flow, gas-liquid-solid microstructure flow, micro-bubble, micro-bubble flow, micro-foam, micro-foam flow, micro-gas-liquid flow, gas-liquid micro-nano emulsion flow, ultra-micro flow, micro-dispersion flow, two items Micro-mixed flow, micro-turbulent flow, micro-bubble flow, micro-bubble, micro-bubble flow, micro-nano bubble and micro-nano bubble flow and other multiphase fluids formed by micro-scale particles, or multi-phase formed by micro-nano-scale particles Fluid (referred to as micro-interface fluid), thereby effectively increasing the mass transfer area of the phase boundary between the gas and/or liquid phase and the liquid and/or solid phase during the reaction.

Continuing to refer to FIG. 1, the material cooling outlet of the cooler 6 communicates with the material separation inlet of the three-phase separator 7 through a pipe 52, and the cooler 6 is also provided with a cooling water inlet 62 and a cooling water outlet 61. Those skilled in the art can understand that the cooler 6 can be a partition cooler, a spray cooler, a jacketed cooler, a coiled tube cooler, and other devices with cooling functions. The present invention is not specifically described here. limit. The three-phase separator 7 also includes a gas phase product outlet 71, a liquid phase product outlet 72, and a solid phase product outlet 73, wherein the solid phase product outlet 73 is used to discharge solid sludge. The three-phase separator 73 in this embodiment may be a glass fiber reinforced plastic three-phase separator, or other types of three-phase separators, which is not limited in the present invention.

The present invention is also provided with a control module, which includes a controller and a detection control element, and the controller is electrically connected to the detection control element.

In some embodiments of the present invention, the detection control element includes:

The first flow pump, the first flow pump is arranged on the pipe connected to the industrial sludge inlet 101 to detect the flow of industrial sludge entering the reactor 1 in real time;

A second flow pump. The second flow pump is arranged on the intake pipe 3 to detect the oxygen flow entering the reactor 1 in real time;

A first pressure detection element, the first pressure detection element is arranged in the micro-interface generator 2 to measure the real-time pressure value in the micro-interface generator 2; and

The second pressure detecting element, the second pressure detecting element is arranged in the reactor 1 to measure the real-time pressure value in the reactor 1.

In some embodiments of the present invention, the micro-interface generator 2 can be set to any one of a pneumatic micro-interface generator, a hydraulic micro-interface generator, or a gas-liquid linkage micro-interface generator according to actual work requirements.

In some embodiments of the present invention, a stirring device 4 is further included, and the stirring device 4 includes a stirring rod 402 arranged in the reactor 1 and a motor 401 that drives the stirring rod 402 to rotate.

In some embodiments of the present invention, two or more gas inlets 102 may also be provided on the reactor 1, and at the same time, at least one micro-interface generator 2 is provided near each gas inlet 102 to communicate with the gas inlet pipe 3 . Those skilled in the art can understand that the arrangement of the gas inlet 102 described in this embodiment may include but is not limited to: a plurality of gas inlets 102 are arranged symmetrically along the axis of the halving rod 402 or along the height of the reactor 1. Direction setting. The micro-interface generator 2 can be installed in the reactor 1 by welding or fastener connection, or can be installed by other connection methods, which is not specifically limited in the present invention.

The present invention also provides a method for treating industrial sludge with a wet oxidation method enhanced by micro-interfaces, the method comprising:

After mixing the industrial sludge and catalyst, pass the industrial sludge inlet 101 into the reactor 1; the oxygen enters the micro-interface generator 2 through the air inlet pipe 3, and the micro-interface generator 2 breaks the oxygen into micron-level bubbles. Industrial sludge forms a gas-liquid emulsion, and the gas-liquid emulsion undergoes a wet oxidation reaction under the action of a catalyst; the stirring rod 402 is driven by the motor 401 for stirring to improve the reaction efficiency;

After the wet oxidation reaction, the industrial sludge enters the cooler 6 for cooling, the cooled industrial sludge enters the three-phase separator 7 for separation, and the separated solid sludge is discharged from the outlet of the solid phase product 73;

The controller respectively receives the industrial sludge flow rate of the first flow pump and the oxygen flow rate of the second flow pump. The controller sets the reference pressure P0, the oxygen reference flow rate Q10, and the industrial sludge reference pressure in the micro-interface generator 2 The flow rate Q20 determines the industrial sludge reference flow rate by comparing the real-time pressure value P in the micro-interface generator 2 with the reference pressure P0, and adjusts the first flow pump to make the real-time detected oxygen flow rate Q1 consistent with the oxygen reference flow rate Q10.

Specifically, the embodiment of the present invention can adjust the reaction efficiency of the micro-interface generator 2 according to the different reaction levels of industrial sludge. For example, in the initial stage of the reaction of industrial sludge with oxygen, the pressure value of the reactor 1 should be appropriately increased. In order to better integrate the industrial sludge and oxygen, the reaction system of the reactor 1 itself and the reaction system of the adjustment micro-interface generator 2 are combined. The pressure value in the reactor 1 is determined by the oxygen flow rate and the industrial sludge flow rate. When the oxygen flow rate is high, the pressure value in the reactor 1 is higher. Therefore, the oxygen reference flow rate Q10 is set at the initial stage of the reaction, and the industrial sludge The ratio of the reference flow rate Q20 is A1, the oxygen reference flow rate Q10 is set in the middle stage of the reaction, the ratio of the industrial sludge reference flow rate Q20 is A2, and A1>A2 is set, and A1, A2 are predetermined. .

In some embodiments of the present invention, the reaction conditions of the wet oxidation reaction are:

Reaction temperature: 100-150℃;

The initial pressure of the reactor: 0.5-1.5MPa;

Reaction pressure: 0.5-1MPa;

Reaction time: 20-60min.

In some embodiments of the present invention, the cooler 6 cools the industrial sludge to below 100° C. and then injects the industrial sludge into the three-phase separator 7.

The catalyst used in the present invention includes at least one of activated carbon, metal cations or a composite composed of activated carbon and metal cations, wherein the activated carbon is powdered activated carbon, which is a common non-metal catalyst with large surface area and high porosity. . In the wet oxidation system, activated carbon can react with water to produce hydroxyl radicals with high catalytic activity, which in turn initiates a series of free radical chain reactions, thereby effectively removing organic matter in industrial sludge. The metal cations include one or two of ^{Fe 3+} or Zn ^{2+ . Similarly, Fe 3+} and Zn ²⁺ can react with water in a wet oxidation system to produce hydroxyl radicals with high catalytic activity and initiate free radical chains. Reaction, and finally remove the organic matter in the industrial sludge efficiently. When powdered activated carbon and metal cations are used together, the metal cations can adhere to the surface of the activated carbon and diffuse into the pores of the activated carbon. The combination of the two can accelerate the formation of hydroxyl radicals and promote the progress of the wet oxidation reaction. The above three substances have high catalytic efficiency and low price, and the reaction process will not cause secondary pollution.

Example 1

This embodiment is a method for wet oxidation treatment of pharmaceutical sludge produced in a pharmaceutical factory. Combined with the treatment device as shown in Figure 1, the method includes the following steps:

Mix the pharmaceutical sludge and powdered activated carbon uniformly, and add it to the reactor 1 from the industrial sludge inlet 101 of the reactor 1, where the water content of the pharmaceutical sludge is 97%, VSS: SS is 81%, and the powdered activated carbon is added The amount is 5g/L; then oxygen is introduced from the gas inlet 102 of the reactor 1, so that the oxygen pressure in the reactor 1 is 0.5 MPa, and the reactor 1 is started, so that the temperature in the reactor is 220 ℃ and the pressure is 1 MPa, so that the pharmaceutical The sludge was subjected to wet oxidation treatment, and the treatment was stopped after 30 minutes. After the wet oxidation treatment, the SS removal rate of the sludge reached 72%, and the VSS removal rate reached 91%.

Example 2

Using the same device, pharmaceutical sludge raw materials and treatment process as in Example 1, only the catalyst selection and conditions have been changed, and the changes are as follows:

Fe ³⁺ ions are used as the catalyst, and the dosage is 0.05 mol/L;

The conditions of the adopted wet oxidation treatment are: temperature 300°C, pressure 1 MPa, reaction time 30 min, and initial pressure of oxygen filling is 1.5 MPa.

Finally, after wet oxidation treatment, the sludge SS removal rate reached 68%, and the VSS removal rate reached 93%.

Example 3

Using the same device, pharmaceutical sludge raw materials and treatment process as in Example 1, only the catalyst selection and conditions have been changed, and the changes are as follows:

Zn ²⁺ ion is used as the catalyst, and the dosage is 0.05mol/L;

The conditions of the adopted wet oxidation treatment are: temperature 200° C., pressure 1.5 MPa, reaction time 60 min, and the initial pressure of oxygen filling is 0.8 MPa.

Finally, after wet oxidation treatment, the sludge SS removal rate reached 66%, and the VSS removal rate reached 87%.

Example 4

Using the same device, pharmaceutical sludge raw materials and treatment process as in Example 1, only the catalyst selection and conditions have been changed, and the changes are as follows:

The powdered activated carbon/Zn ²⁺ composite catalyst is used as the catalyst, and the dosage is 2g/L activated carbon+0.02mol/L Zn ²⁺ ;

The conditions of the adopted wet oxidation treatment are: temperature 100°C, pressure 1 MPa, reaction time 20 min, and initial pressure of oxygen filling is 0.5 MPa.

Finally, after wet oxidation treatment, the sludge SS removal rate reached 73%, and the VSS removal rate reached 90%.

Unless otherwise defined, the technical and scientific terms used herein have the same meanings as commonly understood by those skilled in the technical field of the present invention. The terms used herein are only for describing specific implementation purposes, and are not intended to limit the present invention. The terms such as "component" appearing in this text can mean a single part or a combination of multiple parts. Terms such as "installation", "setup" and the like appearing in this document can mean that one component is directly attached to another component, or that one component is attached to another component through an intermediate piece. The features described in one embodiment herein can be applied to another embodiment alone or in combination with other features, unless the feature is not applicable in the other embodiment or otherwise stated.

The present invention has been described through the above-mentioned embodiments, but it should be understood that the above-mentioned embodiments are only for the purpose of example and description, and are not intended to limit the present invention to the scope of the described embodiments. Those skilled in the art can understand that more variations and modifications can be made according to the teachings of the present invention, and these variations and modifications fall within the scope of protection claimed by the present invention.

Claims (10)

1. A system for treating industrial sludge with a micro-interface enhanced wet oxidation method, which is characterized in that it comprises:

   A reactor, the reactor is provided with a gas inlet, an industrial sludge inlet and a reaction product outlet;

   A micro-interface generator, the micro-interface generator is arranged on the inner wall of the reaction kettle, and the micro-interface generator is arranged near the gas inlet;

   An air inlet pipe, the air inlet pipe is connected to the gas inlet;

   A cooler, the cooler includes a cooling water inlet, a cooling water outlet, a material cooling inlet, and a material cooling outlet, the material cooling inlet communicates with the reaction product outlet through a pipe; and

   A three-phase separator comprising a material separation inlet, a gas phase product outlet, a liquid phase product outlet, and a solid phase product outlet, the material separation inlet being communicated with the material cooling outlet through a pipe; and

   A control module, the control module includes a controller and a detection control element, the controller is electrically connected to the detection control element;

   Wherein, the gas inlet pipe communicates with the micro-interface generator through the gas inlet, and the micro-interface generator is used to break the oxygen from the gas inlet into micron-level bubbles, and the diameter of the bubbles is greater than or equal to 1 μm And less than 1mm.
2. The system for treating industrial sludge with a micro-interface enhanced wet oxidation method according to claim 1, wherein the micro-interface generator is a pneumatic micro-interface generator, a hydraulic micro-interface generator, or a gas-liquid linkage micro-interface Any of the generators.
3. The system for treating industrial sludge with a micro-interface-enhanced wet oxidation method according to claim 1, wherein the detection control element comprises:

   A first flow pump, the first flow pump is arranged on a pipeline connected to the industrial sludge inlet to detect the flow of industrial sludge entering the reactor in real time;

   A second flow pump, the second flow pump is arranged on the intake pipe to detect the flow of oxygen entering the reactor in real time;

   A first pressure detecting element, the first pressure detecting element is arranged in the micro-interface generator to measure the real-time pressure value in the micro-interface generator; and

   The second pressure detecting element is arranged in the reaction kettle to measure the real-time pressure value in the reaction kettle.
4. The system for treating industrial sludge with a micro-interface enhanced wet oxidation method according to claim 1, wherein at least one gas inlet is provided on the reactor, and each gas inlet is provided with At least one of the micro-interface generators is in communication with the air inlet pipe.
5. The system for treating industrial sludge with a micro-interface enhanced wet oxidation method according to claim 1, further comprising a stirring device, the stirring device comprising a stirring rod arranged in the reactor and driving the stirring Motor for rod rotation.
6. A method for treating industrial sludge with a micro-interface-enhanced wet oxidation method, which uses the micro-interface-enhanced wet oxidation method for processing industrial sludge according to any one of claims 1-5, characterized in that: The method includes:

   After mixing industrial sludge and catalyst, pass the industrial sludge inlet into the reactor;

   Oxygen enters the micro-interface generator through the air inlet pipe, and the micro-interface generator breaks the oxygen into micron-level bubbles, and the bubbles and the industrial sludge form a gas-liquid emulsion, the gas-liquid emulsion A wet oxidation reaction occurs under the action of the catalyst;

   The stirring rod is driven by the motor to perform stirring work to improve the reaction efficiency;

   After the wet oxidation reaction, the industrial sludge enters a cooler for cooling, the cooled industrial sludge enters a three-phase separator for separation, and the separated solid sludge is discharged from the solid phase product outlet;

   The controller respectively receives the industrial sludge flow rate of the first flow pump and the oxygen flow rate of the second flow pump. The controller sets the reference pressure P0 in the micro-interface generator, the oxygen reference flow rate Q10, and the industrial sludge reference flow rate Q20, The reference flow rate of industrial sludge is determined by comparing the real-time pressure value P in the micro-interface generator with the reference pressure P0. By adjusting the first flow pump, the real-time detected oxygen flow rate Q1 is consistent with the oxygen reference flow rate Q10.
7. The method for treating industrial sludge with a micro-interface-enhanced wet oxidation method according to claim 6, wherein the water content of the industrial wastewater is 94% or more.
8. The method for treating industrial sludge with a micro-interface enhanced wet oxidation method according to claim 6, wherein the catalyst comprises at least one of activated carbon, metal cations, or a composite composed of activated carbon and metal cations.
9. The method for treating industrial sludge with a micro-interface enhanced wet oxidation method according to claim 6, wherein the reaction conditions of the wet oxidation reaction are:

   Reaction temperature: 100-150℃;

   The initial pressure of the reactor: 0.5-1.5MPa;

   Reaction pressure: 0.5-1MPa;

   Reaction time: 20-60min.
10. The method for treating industrial sludge with a micro-interface enhanced wet oxidation method according to claim 6, wherein the cooler cools the industrial sludge to below 100°C before injecting the industrial sludge into The three-phase separator.

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