Wet oxidation reactor

Abstract

The utility model discloses a wet oxidation reactor which comprises a barrel, a steam inlet pipe is arranged on the left side of the bottom of the barrel, and an exhaust pipe is arranged on the right side of the top of the barrel; a wastewater inlet pipe is arranged on the left side of the top of the barrel; a drain pipe is arranged on the right side of the bottom of the barrel; the middle part of the cylinder body is communicated with a hydrogen peroxide pipe, and a tower tray which is horizontally arranged in the cylinder body is arranged below the liquid outlet end of the hydrogen peroxide pipe; an air inlet pipe is arranged above the liquid discharge pipe and is connected with an L-shaped air pipeline arranged in the cylinder body; a plurality of air spraying pipes are arranged on the air pipeline, and obliquely-arranged blocking eaves are arranged on the air spraying pipes in a matched mode. Gas and liquid are fully mixed, the mass transfer effect is good, the structure is simple, the use is convenient, and the COD (Chemical Oxygen Demand) of wastewater can be effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of chemical equipment technology, and more specifically to a wet oxidation reactor. Background Technology

[0002] With the rapid expansion of industrial scale, environmental pollution has attracted increasing attention, and water pollution has become increasingly serious. Therefore, some factories are using wet oxidation technology to treat wastewater before discharging it.

[0003] Wet oxidation technology is a treatment method that uses oxidants to oxidize and decompose organic matter in wastewater into small molecules such as carbon dioxide, water, and nitrogen under high temperature and high pressure. However, existing wet oxidation treatment devices suffer from problems such as localized oxygen supply and slow reaction rates, leading to insufficient gas-liquid mixing and thus reduced treatment efficiency.

[0004] Therefore, there is an urgent need for a wet oxidation reactor. Utility Model Content

[0005] The technical problem to be solved by this invention is to provide a wet oxidation reactor to address the problems in the background art.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows.

[0007] A wet oxidation reactor includes a cylindrical body, with a steam inlet pipe located on the left side of the bottom of the cylindrical body and an exhaust pipe located on the right side of the top of the cylindrical body; a wastewater inlet pipe located on the left side of the top of the cylindrical body and a drain pipe located on the right side of the bottom of the cylindrical body; a hydrogen peroxide pipe connected to the middle of the cylindrical body, and a horizontally arranged tray located inside the cylindrical body below the outlet end of the hydrogen peroxide pipe; an air inlet pipe located above the drain pipe, and the air inlet pipe connected to an L-shaped air duct located inside the cylindrical body; a plurality of air nozzles are arranged on the air duct, and the air nozzles are equipped with inclined baffles.

[0008] To further optimize the technical solution, the air nozzles are arranged evenly in the longitudinal direction on the air duct, and the air nozzles are set horizontally and perpendicular to the vertical part of the air duct.

[0009] To further optimize the technical solution, the midpoint of the air nozzle is connected to the air duct, and the upper left and right sides of the air nozzle are equipped with oblique rims that slope downwards from the air duct.

[0010] To further optimize the technical solution, the vertical portion of the air duct is located on the central axis of the cylinder.

[0011] To further optimize the technical solution, a tray for placing the catalyst is arranged between the wastewater inlet pipe and the air inlet pipe.

[0012] The technological advancements achieved by this utility model are as follows, due to the adoption of the above technical solutions.

[0013] This invention provides a wet oxidation reactor that, through the installation of air pipes and air nozzles, ensures sufficient contact between wastewater and air, achieving excellent heat and mass transfer effects, thereby effectively removing COD from the wastewater. An inclined baffle is installed above the air nozzles to prevent waste liquid from flowing into the nozzles during injection and affecting gas ejection. A tray for placing the catalyst is included; when the COD removal effect of air oxidation is insufficient, hydrogen peroxide is added to ensure that the effluent COD meets the standards. This invention features thorough gas-liquid mixing, good mass transfer effect, simple structure, and convenient use, effectively reducing the COD of wastewater. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] The components are: 1. Shell, 2. Steam inlet pipe, 3. Hydrogen peroxide pipe, 4. Wastewater inlet pipe, 5. Drain pipe, 6. Air inlet pipe, 7. Air duct, 8. Air nozzle, 9. Eaves, 10. Exhaust pipe, 11. Tray. Detailed Implementation

[0016] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0017] A wet oxidation reactor, combined with Figure 1 As shown, it includes a cylinder 1, a steam inlet pipe 2, a hydrogen peroxide pipe 3, a wastewater inlet pipe 4, a drain pipe 5, an air inlet pipe 6, an air duct 7, an air nozzle 8, a baffle 9, and an exhaust pipe 10.

[0018] A steam inlet pipe 2 is installed on the left side of the bottom of the cylinder 1, an exhaust pipe 10 is installed on the right side of the top of the cylinder 1, a wastewater inlet pipe 4 is installed on the left side of the top of the cylinder 1, and a drain pipe 5 is installed on the right side of the bottom of the cylinder 1.

[0019] A hydrogen peroxide pipe 3 is installed in the middle of the cylinder 1. Hydrogen peroxide is added when air oxidation is insufficient, effectively reducing COD concentration. A horizontally positioned tray is located below the outlet of the hydrogen peroxide pipe, within the cylinder. The tray is positioned between the wastewater inlet pipe 4 and the air inlet pipe 6, and is used to hold the catalyst to accelerate the reaction rate.

[0020] An air inlet pipe 6 is installed above the drain pipe 5, and the air inlet pipe 6 is located at the bottom of the cylinder 1. The air inlet pipe 6 is connected to an L-shaped air pipe 7 installed inside the cylinder 1. The vertical part of the air pipe 7 is located on the central axis of the cylinder 1, and extends from the bottom of the cylinder 1 to the top of the cylinder, ensuring full contact between the air and the wastewater and achieving optimal heat and mass transfer.

[0021] Several air nozzles 8 are installed on the air duct 7 from bottom to top. The air nozzles 8 are evenly distributed longitudinally on the air duct 7, with the midpoint of each air nozzle 8 connected to the air duct 7. The air nozzles 8 are arranged laterally and are perpendicular to the vertical part of the air duct 7. The left and right sides of each air nozzle 8 are equipped with a sloping baffle 9 that extends downwards from the air duct 7. When wastewater flows onto the sloping baffle 9, it will also flow downwards along its slope, effectively preventing wastewater from flowing into the air duct 7 through the air nozzles 8.

[0022] In practical use, steam enters the cylinder 1 through the steam inlet pipe and moves upward; air enters the air duct 7 through the air inlet pipe 6 and is then ejected through the air nozzle 8, moving upward; wastewater enters the cylinder through the wastewater inlet pipe 4. Since the wastewater inlet pipe 4 is located at the top of the cylinder and the drain pipe is located at the bottom, the wastewater flows from top to bottom. The air, steam, and wastewater move in opposite directions and come into full contact, performing heat and mass transfer, thereby gradually reducing the COD in the wastewater. If the air oxidation effect is not ideal, hydrogen peroxide is added to effectively reduce the COD concentration. After contact is complete, the remaining air is discharged through the exhaust pipe 10 at the top of the cylinder.

Claims

1. A wet oxidation reactor, characterized in that: The device includes a cylinder (1), a steam inlet pipe (2) is provided on the left side of the bottom of the cylinder (1), and an exhaust pipe (10) is provided on the right side of the top of the cylinder (1); a wastewater inlet pipe (4) is provided on the left side of the top of the cylinder (1), and a drain pipe (5) is provided on the right side of the bottom of the cylinder (1); a hydrogen peroxide pipe (3) is connected to the middle of the cylinder (1), and a tray (11) is provided below the outlet end of the hydrogen peroxide pipe and is located inside the cylinder and is horizontally arranged; an air inlet pipe (6) is provided above the drain pipe (5), and the air inlet pipe (6) is connected to an L-shaped air pipe (7) located inside the cylinder (1); a number of air nozzles (8) are provided on the air pipe (7), and an inclined baffle (9) is provided on the air nozzles (8).

2. The wet oxidation reactor according to claim 1, characterized in that: The air nozzles (8) are arranged longitudinally and evenly on the air duct (7), and the air nozzles (8) are arranged laterally and perpendicular to the vertical part of the air duct (7).

3. A wet oxidation reactor according to claim 2, characterized in that: The midpoint of the air nozzle (8) is connected to the air duct (7), and the left and right sides of the air nozzle (8) are equipped with a visor (9) that slopes downward from the air duct (7).

4. A wet oxidation reactor according to claim 3, characterized in that: The vertical portion of the air duct (7) is located on the central axis of the cylinder (1).

5. A wet oxidation reactor according to claim 4, characterized in that: A tray for placing the catalyst is arranged between the wastewater inlet pipe (4) and the air inlet pipe (6).

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