Catalytic oxidation coupling efficient biological fluidized bed reactor for petrochemical wastewater treatment

Abstract

The utility model discloses a catalytic oxidation coupling efficient biological fluidized bed reactor for petrochemical wastewater treatment. The catalytic oxidation coupling efficient biological fluidized bed reactor comprises a catalytic oxidation unit and a biological fluidization unit, the catalytic oxidation unit comprises an inner tank body, a central rotating assembly, a lower material mixing cavity, an inner pipe, a liquid inlet pipe and a three-phase separator; a three-phase separator, an inner pipe and a lower material mixing cavity are sequentially arranged in an inner cavity of the inner tank body from top to bottom; the biological fluidization unit comprises an outer tank body, a central liquid baffle ring and a liquid outlet pipe; the outer tank body is sleeved on the outer side of the inner tank body, and a central liquid blocking ring is arranged in a gap between the outer tank body and the outer wall of the inner tank body. And sudden high-concentration or toxic and harmful substances are rapidly treated, and the stability and adaptability of the system are enhanced.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to a catalytic oxidation coupled with a high-efficiency biological fluidized bed reactor for petrochemical wastewater treatment. Background Technology

[0002] Petrochemical wastewater refers to wastewater generated during petroleum and chemical production processes. This type of wastewater typically contains large amounts of organic matter, suspended solids, heavy metals, and toxic and harmful substances, posing a threat to the environment and human health. Catalytic oxidation and biological (aerobic / anaerobic) fluidized bed treatments are commonly used methods for treating petrochemical wastewater, both capable of treating recalcitrant organic matter. Currently, many wastewater treatment projects use these methods in series. This approach requires multiple treatment tanks, resulting in a large overall footprint, making it particularly unsuitable for upgrading existing equipment. Utility Model Content

[0003] The purpose of this invention is to provide a catalytic oxidation coupled with a high-efficiency biological fluidized bed reactor for petrochemical wastewater treatment, so as to solve the problems existing in the prior art.

[0004] To achieve the above objectives, the present invention provides a catalytic oxidation coupled with a high-efficiency biological fluidized bed reactor for petrochemical wastewater treatment, comprising a catalytic oxidation unit and a biological fluidized bed unit; the catalytic oxidation unit includes an inner tank, a central rotating assembly, a lower mixing chamber, an inner tube, an inlet pipe, and a three-phase separator; the inner tank has an opening at the top and an openable sludge outlet pipe at the bottom; the three-phase separator, the inner tube, and the lower mixing chamber are arranged sequentially from top to bottom within the inner tank cavity; the central rotating assembly is located on the axis of the inner tank and includes a drive motor, a central shaft, a lower stirring structure, and spiral propulsion blades; the central rotating assembly... The central shaft passes through the three-phase separator, the inner tube, and the lower mixing chamber; a spiral driving blade is set in the area between the inner tube and the lower mixing chamber, and a lower stirring structure is set in the lower mixing chamber; the liquid inlet pipe is connected to the lower mixing chamber; the biological fluidization unit includes an outer tank, a central liquid-retaining ring, and a liquid outlet pipe; the outer tank is fitted outside the inner tank, and the top of the outer tank is higher than the top of the inner tank; a central liquid-retaining ring is set in the gap between the outer tank and the outer wall of the inner tank; the central liquid-retaining ring is annular, fitted outside the inner tank, with its top fixed to the top plate of the outer tank and its bottom having a gap with the inside of the outer tank; the liquid outlet pipe is located outside the outer tank.

[0005] Furthermore, the catalytic oxidation unit also includes several longitudinal baffle rings; the longitudinal baffle rings are disposed in the area between the sludge outlet pipe and the lower mixing chamber inside the inner tank, and multiple longitudinal baffle rings are coaxial with the inner tank, with gaps between adjacent longitudinal baffle rings.

[0006] Furthermore, the central shaft is coaxial with the inner tank, and the drive motor is mounted on the top plate of the outer tank; the lower stirring structure includes several hollow tubes and connecting rods, the hollow tubes are arranged at an incline and arrayed outside the central shaft, located inside the lower mixing chamber, and connected to the central shaft through the connecting rods.

[0007] Furthermore, the material handling unit is characterized by including several external circulation components, a lower air distribution ring, and an air inlet pipe assembly; the bottom height of the outer tank is also higher than the bottom height of the inner tank, and the bottom of the outer tank is provided with an openable and closable second sludge pipe; the liquid outlet pipe is located on the outside of the outer tank, and its height is lower than the top height of the inner tank, and a three-phase separator is provided in the area between the outer tank and the central liquid baffle ring below the liquid outlet pipe.

[0008] Furthermore, the feature is that a lower air distribution pipe ring is provided at the bottom of the central liquid-blocking ring. The lower air distribution pipe ring is hollow inside and is bent into a ring-shaped round tube, which is connected to the air inlet pipe of the air inlet pipe assembly. An air outlet is provided on the top plate of the outer tank body, which is connected to the air inlet pipe through a return air pipe.

[0009] Furthermore, the circulation component includes a circulation water pipe and a water pump, wherein the two ends of the circulation water pipe are respectively located between the outer tank and the central liquid-retaining ring, and between the central liquid-retaining ring and the inner tank, and a water pump is installed on the circulation water pipe.

[0010] Furthermore, a liquid-blocking protrusion is provided on the outer side of the inner tank at a uniform height at the bottom of the central liquid-blocking ring, or at a height lower than the bottom of the central liquid-blocking ring. The liquid-blocking protrusion is ring-shaped and is provided on the outer side of the inner tank, tilting downward away from the end of the inner tank.

[0011] Furthermore, a sealing ring is provided at the bottom of the liquid-retaining protrusion, which connects the bottom of the liquid-retaining protrusion and the side wall of the inner tank.

[0012] This invention provides a reactor that integrates catalytic oxidation and biological fluidized bed, enabling the coupled use of catalytic oxidation and biological fluidized bed. This allows for more effective removal of organic matter from wastewater, improving treatment efficiency, while also enhancing resistance to shock loads. It is suitable for the rapid treatment of sudden high concentrations or toxic and harmful substances, thereby enhancing the stability and adaptability of the system.

[0013] In terms of specific structure, a mixing device is set at the liquid inlet of the catalytic oxidation unit to achieve full mixing of wastewater and added agents, thereby improving oxidation treatment efficiency. At the same time, the spiral-driven blades can also improve the circulation of wastewater in the catalytic oxidation unit. Meanwhile, a longitudinal baffle ring is set at the bottom of the equipment to reduce the disturbance of the bottom sludge by the spiral-driven blades and prevent excessive sludge from entering the subsequent biological fluidization unit.

[0014] For the biological fluidized bed unit, a U-shaped fluidized bed structure is adopted, which is used in conjunction with a circulating water pump to achieve the effect of wastewater circulation within a small volume. At the same time, the bottom of the U-shaped layout is optimized to reduce the disturbance of the bottom sediment during circulation and improve the treatment efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall scheme of one embodiment of the present utility model.

[0016] Figure 2 This is a cross-sectional view of the overall scheme of another embodiment of the present utility model.

[0017] Figure 3 This is a partially enlarged view of the catalytic oxidation unit in one embodiment of this utility model.

[0018] Figure 4 This is a partially enlarged view of the stirring structure under the catalytic oxidation unit in one embodiment of this utility model.

[0019] Figure 5 This is a partially enlarged view of the lower part of the biological fluidization unit according to an embodiment of this utility model. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] As attached Figure 1-5 As shown, the present invention relates to a catalytic oxidation coupled with a high-efficiency biological fluidized bed reactor for petrochemical wastewater treatment, comprising a catalytic oxidation unit 1 and a biological fluidization unit 2.

[0022] As attached Figure 1 , 2 As shown, the catalytic oxidation unit 1 includes an inner tank 11, a central rotating assembly 12, a lower mixing chamber 13, several longitudinal baffle rings 14, an inner tube 15, an inlet pipe 16, and a three-phase separator S.

[0023] As attached Figure 1 , 2As shown in Figures 3 and 4, the inner tank 11 is an open-top, hollow, rotating cavity structure with an openable sludge discharge pipe 111 at the bottom. Above the sludge discharge pipe 111 within the inner tank 11, multiple longitudinal baffle rings 14 are coaxial with the inner tank 11. The longitudinal baffle rings 14 have different sizes, and gaps are provided between adjacent longitudinal baffle rings 14. A lower mixing chamber 13 is located at a certain distance above the longitudinal baffle rings 14. The lower mixing chamber 13 is shaped like an inverted hemispherical shell. An inner tube 15 is located at a certain distance above the lower mixing chamber 13. The lower mixing chamber 13, inner tube 15, and longitudinal baffle rings 14 are coaxial with the inner tank 11. The inner tube 15, lower mixing chamber 13, inner tube 15, and longitudinal baffle rings 14 are fixed inside the inner tank 11 by a support rod z.

[0024] A three-phase separator S is provided in the upper part of the inner cavity of the inner tank 11. The specific structure of the three-phase separator S is conventional knowledge in the field.

[0025] The central rotating assembly 12 includes a drive motor 121, a central shaft 122, a lower stirring structure 123, and a spiral driving blade 124. The central shaft 122 is coaxial with the inner tank 11, and its bottom extends into the lower mixing chamber 13 and is connected to the lower stirring structure 123. A spiral driving blade 124 is provided on the outside of the central shaft 122 in the area between the lower mixing chamber 13 and the inner tube 15. The top is connected to the drive motor 121, which is mounted on the top plate of the outer tank 21.

[0026] The inlet pipe 16 passes through the outer tank 21 and the inner tank 11 in sequence and is connected to the lower mixing chamber 13. Wastewater flows into the lower mixing chamber 13 through the inlet pipe 16.

[0027] The lower stirring structure 123 includes several inclined hollow tubes 1231 and connecting rods 1232. The hollow tubes 123 are arranged in an array outside the central shaft 122 and located inside the lower mixing chamber 13, and are connected to the central shaft 122 through the connecting rods 1232. Since the hollow tubes 123 are hollow inside, when rotating, the liquid in the lower mixing chamber 13 will flow into and out of the hollow tubes 1231, thereby achieving turbulence in the lower mixing chamber 13 and achieving uniform stirring of the liquid flowing into the inlet pipe.

[0028] As attached Figure 1 , 2 The biological fluidization unit 2 shown in Figure 5 includes an outer tank 21, a central liquid-retaining ring 22, several circulation components 23, a lower air distribution pipe ring 24, an air inlet pipe assembly 25, and an outlet pipe 27.

[0029] The outer tank 21 is a hollow, rotating cavity structure with a top plate. The outer tank 21 is positioned outside the inner tank 11, specifically fitted over it. The bottom of the outer tank 21 is angled and connected to the outer side of the inner tank 11. The top and bottom of the outer tank 21 are both higher than the top and bottom of the inner tank 11. A second, openable sludge pipe 211 is located at the bottom of the outer tank 21.

[0030] The liquid outlet pipe 27 is located on the outside of the outer tank 21, and its height is lower than the top height of the inner tank 11. A three-phase separator S is provided in the area between the outer tank 21 and the central liquid baffle ring 22 below the liquid outlet pipe 27.

[0031] A central liquid-blocking ring 22 is provided in the gap between the outer tank 21 and the outer wall of the inner tank 11. The central liquid-blocking ring 22 is annular and fits around the outer side of the inner tank. The top is fixed to the top plate of the outer tank 21, and the bottom is separated from the interior of the outer tank 21. A lower air distribution pipe ring 24 is provided at the bottom of the central liquid-blocking ring 22. The lower air distribution pipe ring 24 is hollow inside and is bent into an annular round tube, which is connected to the air inlet pipe 251 of the air inlet pipe assembly 25.

[0032] An air outlet is provided on the top plate of the outer tank 21, which is connected to the air inlet pipe 251 through the air return pipe 252. An air pump or other conventional accessories in the field can be installed on the air return pipe 252.

[0033] The circulation component 23 includes a circulation water pipe 231 and a water pump 232. The two ends of the circulation water pipe 231 are respectively located between the outer tank 21 and the central liquid-retaining ring 22, and between the central liquid-retaining ring 22 and the inner tank 11. The water pump 232 is installed on the circulation water pipe 231 to realize the circulation of water in the area between the outer tank 21 and the central liquid-retaining ring 22 and the area between the central liquid-retaining ring 22 and the inner tank 11.

[0034] Furthermore, a baffle plate 26 is provided on the outer side of the inner tank 11 at a uniform height or lower than the bottom of the central baffle ring 22. The baffle plate 26 is annular and located on the outer side of the inner tank 11, tilting downwards away from the end of the inner tank 11. This facilitates the direct flow of liquid from the area between the central baffle ring 22 and the inner tank 11 to the area between the outer tank 21 and the central baffle ring 22, reducing disturbance to the sludge inside the outer tank 21. For ease of cleaning, a sealing ring is provided at the bottom of the baffle plate 26 to connect the bottom of the baffle plate 26 to the side wall of the inner tank 11.

[0035] It should be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

Claims

1. A catalytic oxidation coupled high-efficiency biological fluidized bed reactor for petrochemical wastewater treatment, characterized in that, The utility model provides a catalytic oxidation unit, biological fluidization unit, the catalytic oxidation unit includes inner jar body, central rotation component, lower mixing cavity, inner tube, liquid inlet pipe, three -phase separator, the inner jar body top is open, bottom is provided with the openable sludge pipe, is provided with three -phase separator, inner tube, lower mixing cavity from top to bottom in the inner jar body inner chamber, central rotation component sets up on the inner jar body axis, includes drive motor, central shaft, lower stirring structure, spiral pushing blade, the central shaft passes three -phase separator, inner tube, lower mixing cavity, sets up spiral pushing blade in the area between inner tube and lower mixing cavity, sets up lower stirring structure in lower mixing cavity, and liquid inlet pipe communicates with lower mixing cavity, the biological fluidization unit includes outer jar body, central liquid baffle ring, liquid outlet pipe, the outer jar body is sleeved in the outer side of inner jar body, the outer jar body top height is higher than the inner jar body top height, is provided with central liquid baffle ring in the gap between the outer jar body same outer wall of inner jar body, and central liquid baffle ring is annular, is sleeved in the outer side of inner jar body, and top is fixed to the outer jar body top plate, and bottom is provided with the gap with the inside of outer jar body, and liquid outlet pipe is provided in the outer side of outer jar body.

2. The catalytic oxidation coupled high-efficiency biological fluidized bed reactor for petrochemical wastewater treatment according to claim 1, characterized in that, The catalytic oxidation unit further comprises a plurality of longitudinal flow separation rings; the longitudinal flow separation rings are arranged in the area between the sludge outlet pipe and the lower mixing cavity inside the inner jar body, the plurality of longitudinal flow separation rings are coaxial with the inner jar body, and gaps are provided between adjacent longitudinal flow separation rings.

3. The catalytic oxidation coupled high-efficiency biological fluidized bed reactor for petrochemical wastewater treatment according to claim 1, characterized in that, The central shaft is coaxial with the inner jar body, and the drive motor is arranged on the outer jar body top plate; the lower stirring structure comprises a plurality of hollow tubes and connecting rods, the hollow tubes are arranged obliquely, are arranged in an array on the outer side of the central shaft, and are located inside the lower mixing cavity and connected to the central shaft by the connecting rods.

4. The catalytic oxidation coupled high-efficiency biological fluidized bed reactor for petrochemical wastewater treatment according to claim 1, characterized in that, The biological fluidization unit further comprises a plurality of circulating assemblies, a lower air distribution pipe ring, and an air inlet pipe assembly; the bottom of the outer jar body is also higher than the bottom of the inner jar body, and the bottom of the outer jar body is provided with a second sludge outlet pipe that can be opened and closed; the liquid outlet pipe is arranged on the outer side of the outer jar body and has a height lower than the top of the inner jar body, and a three-phase separator is arranged in the area between the outer jar body below the liquid outlet pipe and the central liquid baffle ring.

5. The catalytic oxidation coupled high-efficiency biological fluidized bed reactor for petrochemical wastewater treatment according to claim 4, characterized in that, A lower air distribution pipe ring is arranged at the bottom of the central liquid baffle ring, the lower air distribution pipe ring is hollow inside, is bent into a ring-shaped pipe, and communicates with the air inlet pipe of the air inlet pipe assembly; an air outlet is arranged on the top plate of the outer jar body and communicates with the air inlet pipe through an air return pipe.

6. The catalytic oxidation coupled high-efficiency biological fluidized bed reactor for petrochemical wastewater treatment according to claim 4, characterized in that, The circulating assembly comprises a circulating water pipe and a water pump, wherein the two ends of the circulating water pipe are arranged in the areas between the outer jar body and the central liquid baffle ring and between the central liquid baffle ring and the inner jar body respectively, and the water pump is arranged on the circulating water pipe.

7. The catalytic oxidation coupled high-efficiency biological fluidized bed reactor for petrochemical wastewater treatment according to claim 6, characterized in that, A liquid baffle protruding plate is arranged on the outer side of the inner jar body at a uniform height or a height lower than the bottom of the central liquid baffle ring, the liquid baffle protruding plate is annular, is arranged on the outer side of the inner jar body, and is inclined downward away from the end of the inner jar body.

8. The catalytic oxidation coupled high-efficiency biological fluidized bed reactor for petrochemical wastewater treatment according to claim 7, characterized in that, A sealing ring is arranged at the bottom of the liquid baffle protruding plate, and the sealing ring connects the bottom of the liquid baffle protruding plate and the side wall of the inner jar body.

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