A high-efficiency energy-saving wet oxidation device

Abstract

The utility model relates to organic wastewater treatment technical field, concretely is a kind of efficient energy -conserving wet oxidation device. Including: multistage tubular heat exchanger, catalytic reaction cavity, plate heat exchanger and gas-liquid separator are sequentially communicated;Catalytic reaction cavity is provided with stirring part and honeycomb catalyst module, honeycomb catalyst module is divided into two cavities by catalytic reaction cavity;Stirring part includes: stirring rod, rotatably set in catalytic reaction cavity;Stirring paddle, install on stirring rod, and respectively located two cavities formed by catalytic reaction cavity being separated. Honeycomb catalyst module includes first honeycomb layer and second honeycomb layer, first honeycomb layer and second honeycomb layer stagger along the thickness direction of honeycomb catalyst module. It solves the problem of high energy consumption, low efficiency and equipment loss of traditional wet oxidation technology, especially suitable for high-concentration organic wastewater treatment in chemical industry, pharmaceutical industry and other industries.

Description

Technical Field

[0001] This utility model relates to the field of organic wastewater treatment technology, specifically to a high-efficiency and energy-saving wet oxidation device. Background Technology

[0002] Wet air oxidation (WAO) is a deep oxidation technology used to treat high-concentration organic wastewater. Under high temperature (150-320℃) and high pressure (2-20MPa) reaction conditions, it uses oxygen or air as an oxidant to effectively oxidize and decompose organic pollutants in wastewater into small molecule organic matter, carbon dioxide, and water.

[0003] However, this technology still faces several key bottlenecks in existing applications: First, poor multiphase mixing and mass transfer within the reactor lead to insufficient contact between organic matter and the oxidant, limiting reaction efficiency and degradation levels. Second, high temperature, high pressure, and acidic intermediates generated during the reaction process collectively exacerbate corrosion of the reaction system, significantly affecting the service life and operational stability of core components. Third, drastic fluctuations in pressure and temperature may trigger significant safety risks such as seal failure, media leakage, and even explosions. These issues restrict the reliability, economic viability, and widespread application of this technology. Utility Model Content

[0004] In order to solve the technical problems existing in the background art, this utility model provides a high-efficiency and energy-saving wet oxidation device, which solves the problems of high energy consumption, low efficiency and equipment wear of traditional wet oxidation technology, and is particularly suitable for the treatment of high-concentration organic wastewater in chemical, pharmaceutical and other industries.

[0005] The technical solution adopted by this utility model to solve its technical problem is: A high-efficiency and energy-saving wet oxidation device includes: The system consists of a multi-stage tubular heat exchanger, a catalytic reaction chamber, a plate heat exchanger, and a gas-liquid separator connected in sequence. The catalytic reaction chamber is equipped with a stirring unit and a honeycomb catalyst module, which divides the catalytic reaction chamber into two chambers. The stirring section includes: A stirring rod is rotatably mounted inside the catalytic reaction chamber; The stirring paddle is mounted on the stirring rod and is located in two chambers that are separated from the catalytic reaction chamber.

[0006] Furthermore, the agitator comprises a first component, a second component, and a third component that are integrally formed; The second component has a groove; The third component and the first component are provided with matching connection holes; The first component of one impeller is connected and fixed to the third component of another impeller through a connecting hole, so that the second components of the two impellers enclose a cavity for accommodating the stirring rod.

[0007] Furthermore, the second component has positioning holes; Multiple positioning grooves are provided along the length of the stirring rod, and the positioning grooves are adapted to the positioning holes.

[0008] Furthermore, the first component is fixedly provided with a protruding reinforcing rib, which is fixedly connected to the second component.

[0009] Furthermore, the honeycomb catalyst module includes a first honeycomb layer and a second honeycomb layer, which are arranged alternately along the thickness direction of the honeycomb catalyst module.

[0010] Furthermore, a dual redundant pressure relief valve is installed at the upper end of the catalytic reaction chamber.

[0011] Furthermore, an emergency cooling water spray device is installed at the upper end of the catalytic reaction chamber.

[0012] Furthermore, an ultrasonic disperser is installed at the bottom of the catalytic reaction chamber.

[0013] Furthermore, the outer side of the catalytic reaction chamber is covered with a heat insulation layer.

[0014] The beneficial effects of this utility model are: (1) It solves the problems of high energy consumption, low efficiency and equipment wear of traditional wet oxidation technology, and is particularly suitable for the treatment of high-concentration organic wastewater in chemical, pharmaceutical and other industries.

[0015] (2) The stirring section is located in the two chambers separated by the honeycomb catalyst module to achieve full stirring and mixing of the reactants on both sides of the catalyst module. Combined with the ultrasonic disperser at the bottom, it improves the reaction rate and mass transfer efficiency.

[0016] (3) The honeycomb catalyst module adopts a double-layer staggered arrangement, which increases the specific surface area and flow channel tortuosity, prolongs the residence time of reactants, and improves catalytic efficiency and treatment effect.

[0017] (4) A dual redundant pressure relief valve is installed at the upper end of the catalytic reaction chamber to provide dual overpressure protection, which significantly improves the safety of the device operation. The emergency cooling water spray device can be quickly started in case of abnormal temperature rise, forcibly cooling down, effectively preventing the reaction from getting out of control and improving the system safety level.

[0018] (5) The agitators are assembled and installed by connecting holes, which makes the structure compact, easy to assemble, easy to manufacture, install and maintain and replace. 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 of this utility model; Figure 2 This is a cross-sectional view of the catalytic reaction chamber; Figure 3 This is a schematic diagram of the stirring section; Figure 4 This is a schematic diagram of the honeycomb catalyst module; Figure 5 This is a schematic diagram of the agitator.

[0021] In the picture: 1. Multistage tubular heat exchanger, 2. Catalytic reaction chamber, 3. Insulation layer, 4. Stirring section, 5. Ultrasonic disperser, 6. Honeycomb catalyst module, 7. Plate heat exchanger, 8. Gas-liquid separator, 9. Dual redundant pressure relief valve, 10. Emergency cooling water spray device; 401. Stirring rod; 402. Stirring paddle; 601. First honeycomb layer; 602. Second honeycomb layer; 4021. First component, 4022. Second component, 4023. Third component, 4024. Positioning hole, 4025. Reinforcing rib. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the accompanying drawings.

[0023] like Figure 1 , 2 As shown, a high-efficiency and energy-saving wet oxidation device comprises a multi-stage tubular heat exchanger 1, a catalytic reaction chamber 2, a plate heat exchanger 7, and a gas-liquid separator 8 connected in sequence. The catalytic reaction chamber 2 is equipped with a stirring unit 4 and a honeycomb catalyst module 6, which divides the catalytic reaction chamber 2 into two chambers. The catalytic reaction chamber 2 is made of double-layer corrosion-resistant titanium alloy. The plate heat exchanger 7 can preheat the inlet water using the high-temperature fluid after the reaction.

[0024] A dual-redundant pressure relief valve 9 is installed at the upper end of the catalytic reaction chamber 2. An emergency cooling water spray device 10 is also installed at the upper end of the catalytic reaction chamber 2. An ultrasonic disperser 5 is installed at the bottom of the catalytic reaction chamber 2. The outer side of the catalytic reaction chamber 2 is covered with an insulation layer 3. The dual-redundant pressure relief valve 9 at the upper end of the catalytic reaction chamber 2 provides dual overpressure protection, significantly improving the safety of the device operation. The emergency cooling water spray device 10 can be quickly activated in case of abnormal temperature rise, forcibly cooling down the system, effectively preventing reaction runaway, and improving the system safety level.

[0025] like Figure 3As shown, the specific structure of the stirring unit 4 includes a stirring rod 401, which is rotatably disposed within the catalytic reaction chamber 2. A stirring paddle 402 is mounted on the stirring rod 401 and is located in one of the two chambers formed by the separation of the catalytic reaction chamber 2. The stirring unit 4, situated in the two chambers separated by the honeycomb catalyst module 6, achieves thorough stirring and mixing of the reactants on both sides of the honeycomb catalyst module 6. Combined with the ultrasonic disperser 5 at the bottom, it improves the reaction rate and mass transfer efficiency.

[0026] like Figure 5 As shown, the impeller 402 comprises an integrally formed first component 4021, a second component 4022, and a third component 4023. The second component 4022 has a groove. The third component 4023 and the first component 4021 have matching connecting holes. The first component 4021 of one impeller 402 and the third component 4023 of another impeller 402 are connected and fixed to each other through the connecting holes, so that the second components 4022 of the two impellers 402 enclose a cavity for accommodating the stirring rod 401. The impellers 402 are assembled and installed together through the connecting holes, resulting in a compact structure, convenient assembly, and ease of manufacturing, installation, and subsequent maintenance and replacement.

[0027] The second component 4022 has a positioning hole 4024. The stirring rod 401 has multiple positioning grooves along its length, which are adapted to the positioning hole 4024. Through the cooperation of the positioning hole 4024 and the positioning groove, the stirring paddle 402 has multiple selectable installation positions, which are convenient for adjustment according to actual working conditions.

[0028] The first component 4021 is fixedly provided with a protruding reinforcing rib 4025, which is fixedly connected to the second component 4022. The reinforcing rib 4025 can enhance the strength of the first component 4021. Furthermore, the protruding reinforcing rib 4025 can also enhance the mixing effect.

[0029] like Figure 4 As shown, the honeycomb catalyst module 6 is composed of CeO2-MnO2 / γ-Al2O3, which can enhance the oxidation reaction rate. Its specific structure includes a first honeycomb layer 601 and a second honeycomb layer 602, which are staggered along the thickness direction of the honeycomb catalyst module 6. The honeycomb catalyst module 6 employs a double-layer staggered arrangement, increasing the specific surface area and flow channel tortuosity, prolonging the reactant residence time, and improving catalytic efficiency and treatment effect.

[0030] Specific working methods: Step 1: After pretreatment, the wastewater is preheated to 120-150℃ through a multi-stage tubular heat exchanger 1 and then enters the catalytic reaction chamber 2. Step 2: Inject high-pressure oxygen at a pressure of 5-10 MPa, and start the ultrasonic disperser 5 and the stirring unit 4; Step 3: Under the action of a catalyst, react at 220-280℃ for 30-60 minutes, COD removal rate ≥95%; Step 4: After the reaction, the fluid is cooled by plate heat exchanger 7, and after gas-liquid separation by gas separator 8, qualified water and CO2 / N2 gas are discharged.

[0031] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, 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. A high-efficiency and energy-saving wet oxidation device, characterized in that, include: A multi-stage tubular heat exchanger (1), a catalytic reaction chamber (2), a plate heat exchanger (7), and a gas-liquid separator (8) are connected in sequence. The catalytic reaction chamber (2) is provided with a stirring part (4) and a honeycomb catalyst module (6), which divides the catalytic reaction chamber (2) into two chambers. The stirring section (4) includes: A stirring rod (401) is rotatably mounted inside the catalytic reaction chamber (2); A stirring paddle (402) is mounted on the stirring rod (401) and is located in the two chambers formed by the separation of the catalytic reaction chamber (2).

2. The high-efficiency and energy-saving wet oxidation device according to claim 1, characterized in that, The stirring paddle (402) includes an integrally formed first component (4021), a second component (4022), and a third component (4023). The second component (4022) has a groove; The third component (4023) and the first component (4021) are provided with matching connection holes; The first component (4021) of one impeller (402) and the third component (4023) of another impeller (402) are connected and fixed to each other through the connecting hole, so that the second components (4022) of the two impellers (402) enclose a cavity for accommodating the stirring rod (401).

3. The high-efficiency and energy-saving wet oxidation device according to claim 2, characterized in that, The second component (4022) has a positioning hole (4024); The stirring rod (401) has multiple positioning grooves along its length, and the positioning grooves are adapted to the positioning holes (4024).

4. The high-efficiency and energy-saving wet oxidation device according to claim 2, characterized in that, The first component (4021) is fixedly provided with a protruding reinforcing rib (4025), and the reinforcing rib (4025) is fixedly connected to the second component (4022).

5. The high-efficiency and energy-saving wet oxidation device according to claim 1, characterized in that, The honeycomb catalyst module (6) includes a first honeycomb layer (601) and a second honeycomb layer (602), which are arranged alternately along the thickness direction of the honeycomb catalyst module (6).

6. The high-efficiency and energy-saving wet oxidation device according to claim 1, characterized in that, The upper end of the catalytic reaction chamber (2) is equipped with a dual redundant pressure relief valve (9).

7. The high-efficiency and energy-saving wet oxidation device according to claim 1, characterized in that, An emergency cooling water spray device (10) is provided at the upper end of the catalytic reaction chamber (2).

8. The high-efficiency and energy-saving wet oxidation device according to claim 1, characterized in that, An ultrasonic disperser (5) is provided at the bottom of the catalytic reaction chamber (2).

9. The high-efficiency and energy-saving wet oxidation device according to claim 1, characterized in that, The outer side of the catalytic reaction chamber (2) is covered with a heat insulation layer (3).

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