Functionalized biological fluidized bed for treating petroleum hydrocarbon pollutants

Abstract

The utility model discloses a functional biological fluidized bed for treating petroleum hydrocarbon pollutants. The functional biological fluidized bed comprises a tank body, an inner pipe, a three-phase separation assembly, a feeding assembly and a circulating assembly, wherein the circulating assembly comprises a plurality of circulating units which are arranged in a circumferential array mode, each circulating unit comprises a circulating pipe and a circulating pump, and the feeding assembly comprises a water inlet pipe, an air inlet pipe, a water distribution piece and a plurality of spray heads; the spray head comprises a spray head inner pipe, a spray head inner pointed cone, a spray head outer pipe and a connecting cross plate; the spray head inner pointed cone is in an inverted cone shape and is arranged in the spray head inner pipe; and the spray head inner pipe is arranged in the spray head outer pipe. According to the functionalized biological fluidized bed for treating the petroleum hydrocarbon pollutants, provided by the utility model, through the arrangement of the circulating pump, the fluidity in the biological fluidized bed can be improved, the utilization rate of filler can be improved, and in water inlet and gas inlet links, the mixing efficiency of sewage and oxygen can be improved by adopting a design similar to a double-flow nozzle; the treatment capacity of the filler is favorably improved.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically a functionalized biological fluidized bed for treating petroleum hydrocarbon pollutants. Background Technology

[0002] Petroleum hydrocarbon pollutants are toxic, hydrophobic, and highly mobile. They not only adsorb into soil media, disrupting the balance of soil organic matter composition and structure, but also enter surface water and groundwater, causing water quality deterioration and poisoning aquatic organisms. Petroleum hydrocarbons can enter the human body through food chain transport, respiration, and skin contact, harming human health. Petroleum hydrocarbon pollution sources are widespread, including the dumping of oily solid waste, spills of crude oil, irrigation with oily wastewater or water sources contaminated by petroleum, and atmospheric deposition of petroleum hydrocarbons. In the treatment of petroleum hydrocarbon-contaminated wastewater, biological fluidized bed technology is widely used due to its unique advantages. Biological fluidized beds use small-diameter solid particles as carriers to achieve high biomass maintenance and good mass transfer in a fluidized state, thus providing high volumetric loading, strong shock resistance, and rapid microbial reaction rates. Simultaneously, they have a simple structure, low energy consumption, effectively mitigate membrane fouling, and reduce operating costs.

[0003] In the use of biological fluidized beds, due to the presence of packing material, the fluidized bed is prone to poor flow and circulation of sewage, resulting in low utilization of the packing material and the biological fluidized bed failing to fully realize its design efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a functionalized biological fluidized bed for the treatment of petroleum hydrocarbon pollutants, so as to solve the problems existing in the prior art.

[0005] To achieve the above objectives, the present invention provides a functionalized biological fluidized bed for treating petroleum hydrocarbon pollutants, comprising a tank, an inner tube, a three-phase separation component, a feeding component, and a circulation component; wherein the circulation component comprises several circulation units arranged in a circumferential array, each circulation unit comprising a circulation pipe and a circulation pump, wherein the water inlet end of the circulation pipe passes through the tank and is disposed between the tank and the inner tube, and the other end passes through the tank and is disposed inside the inner tube, and a circulation pump is disposed on the circulation pipe.

[0006] Preferably, the tank is a hollow rotating cavity structure with a water outlet at the top and a mud outlet at the bottom, and its bottom side slopes inward to form a frustum shape; the top of the bottom frustum shape of the tank is higher than the bottom of the inner tube.

[0007] Preferably, the inlet end of the circulation pipe is provided with a cross-section inclined to the vertical plane, and a filter screen is provided at the inlet end.

[0008] Preferably, the feeding assembly includes a water inlet pipe, an air inlet pipe, a water distribution component, and a plurality of nozzles; each nozzle includes an inner nozzle tube, an inner nozzle cone, an outer nozzle tube, and a connecting cross plate; the inner nozzle cone is an inverted cone shape and is disposed inside the inner nozzle tube; the inner nozzle tube is disposed inside the outer nozzle tube.

[0009] Preferably, the inner nozzle tube, the inner nozzle cone, and the outer nozzle tube are coaxial and interconnected at the top via the connecting cross plate; the height of the inner nozzle cone is less than the length of the outer nozzle tube, the length of the outer nozzle tube is less than the length of the inner nozzle tube, and the bottom of the outer nozzle tube is closed; the outer nozzle tube is connected to the air inlet pipe; and the inner nozzle tube is connected to the water inlet pipe via a water distribution component.

[0010] Preferably, the top of the nozzle outer tube is inclined inward, thereby reducing the gap between the top nozzle outer tube and the nozzle inner tube.

[0011] Preferably, the other end of the circulation pipe is connected to the water inlet pipe.

[0012] Preferably, the water distribution component is frustum-shaped, including an outer side, an inner side, and a top surface. The outer side and the inner side are nested together. The top surface is disc-shaped, covering the top opening of the outer side. The outer nozzles are arranged in a circumferential array on the top surface. The inner tube of the nozzle is spatially connected to the outer side and the inner side. The inner tube of the nozzle located in the center passes through the top surface and is connected to the bottom of the inner side. The bottom of the outer side is connected to the water inlet pipe.

[0013] This invention provides a functionalized biological fluidized bed for treating petroleum hydrocarbon pollutants. By setting up a circulating pump, the fluidity inside the biological fluidized bed can be improved, and the utilization rate of the packing material can be increased. In the water inlet and air inlet stages, the design similar to a dual-flow nozzle can be adopted to improve the mixing efficiency of sewage and oxygen, which is beneficial to improving the treatment capacity of the packing material. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall design of this utility model.

[0015] Figure 2 This is a partial cross-sectional view of the bottom of the tank according to an embodiment of the present invention.

[0016] Figure 3 This is a partial cross-sectional view of the bottom of the tank in another embodiment of the present invention.

[0017] Figure 4 This is an enlarged schematic diagram of the feeding assembly of this utility model.

[0018] Figure 5 This is a partial cross-sectional view of the feeding assembly of this utility model.

[0019] Figure 6This is a cross-sectional view of the nozzle of the feeding assembly 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 1-6 As shown, the functionalized biological fluidized bed for treating petroleum hydrocarbon pollutants according to this utility model includes a tank 1, an inner tube 2, a three-phase separation component 3, a feeding component 4, and a circulation component 5.

[0022] As attached Figure 1 , 2 As shown in Figures 1 and 3, the tank 1 is a hollow rotating cavity structure with a water outlet 11 at the top and an openable mud outlet 12 at the bottom. The bottom side of the tank is inclined inward to form a frustum shape. An inner tube 2 is installed inside the tank. The outer diameter of the inner tube 2 is smaller than the inner diameter of the tank 1. It is installed in the central area inside the tank 1 via a connecting rod.

[0023] Packing material (not shown in the attached diagram) is installed in the gap between inner pipe 2 and / or inner pipe 2 and tank body. The specific packing material is selected according to the specific conditions of the wastewater being treated.

[0024] A three-phase separation assembly 3 is installed in the space of the tank 1 above the inner tube 2. The three-phase separation assembly 3 is a conventional structure in the field. In one embodiment of this application, the three-phase separation assembly 3 includes an outer ring and inner corner pieces. The inner corner pieces are formed by bending sheet metal and are arranged in layers with adjacent layers of inner corner pieces staggered.

[0025] As attached Figure 2 As shown, further, the bottom of the tank 1 is inclined inward to form a frustum-shaped bottom frustum side 13, the top of which is higher than the bottom of the inner pipe 2. This can optimize the path of sewage flowing from the outside of the inner pipe 2 into the inner pipe 2 and reduce flow resistance.

[0026] The circulation component 5 includes several circulation units 51, three of which are shown in the figure, arranged in a circular array. Each circulation unit 51 includes a circulation pipe 511 and a circulation pump 512. One end of the circulation pipe 511 is the water inlet end, which passes through the tank 1 and is located between the tank 1 and the inner pipe 2. The other end passes through the tank 1 and is located inside the inner pipe 2. A circulation pump 512 is installed on the circulation pipe 511.

[0027] As attached Figure 3As shown, due to the presence of packing material, in order to reduce the amount of packing material entering the circulation pipe 511, the water inlet end of the circulation pipe 511 is provided with a cross-section inclined to the vertical plane, and a filter screen 513 is provided at the water inlet end. The presence of the inclined cross-section can play a certain self-cleaning role, eliminating the need for frequent manual cleaning.

[0028] As attached Figure 4-6 As shown, the feeding assembly 4 includes a water inlet pipe 41, an air inlet pipe 42, a water distribution component 43, and several nozzles 44.

[0029] Furthermore, the other end of the circulation pipe 511 is directly connected to the water inlet pipe 41.

[0030] The nozzle 44 includes an inner nozzle tube 441, an inner nozzle cone 442, an outer nozzle tube 443, and a connecting cross plate 444.

[0031] The inner cone 442 of the nozzle is an inverted cone shape and is located inside the inner tube 441 of the nozzle; the inner tube 441 of the nozzle is located inside the outer tube 443 of the nozzle, and the inner tube 441, the inner cone 442, and the outer tube 443 of the nozzle are coaxial and connected to each other at the top through the connecting cross plate 444.

[0032] The height of the inner cone 442 of the nozzle is less than the length of the outer tube 443 of the nozzle, the length of the outer tube 443 of the nozzle is less than the length of the inner tube 441 of the nozzle, and the bottom of the outer tube 443 of the nozzle is closed.

[0033] The outer nozzle tube 443 is connected to the air inlet pipe, and gas enters the gap between the outer nozzle tube 443 and the inner nozzle tube 441. The top of the outer nozzle tube 443 is tilted inward, which reduces the gap between the top of the outer nozzle tube 443 and the inner nozzle tube 441. The inner nozzle tube 441 is connected to the water inlet pipe 41 through the water distribution component 43.

[0034] The attached diagram shows five nozzles 44. The water distribution component 43 is generally frustum-shaped, including an outer side 431, an inner side 432, and a top surface 433. The outer side 431 and the inner side 432 are nested together. The top surface 433 is disc-shaped and covers the top opening of the outer side 431. The outer nozzles 44 are arranged in a circumferential array on the top surface 433. The inner tube 441 of the nozzle is spatially connected to the outer side 431 and the inner side 432. The inner tube 441 of the nozzle 44 located in the center passes through the top surface 433 and is connected to the bottom of the inner side 432. The bottom of the outer side 431 is connected to the water inlet pipe 41.

[0035] The nozzle outer tubes 443 of multiple nozzles 44 are connected to each other through connecting pipes, and the nozzle outer tube 443 of one of the nozzles 44 is connected to the air inlet pipe 42.

[0036] This allows the gas to be fully mixed with the wastewater directly at the nozzle 44 outlet during the air and water intake process.

[0037] 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 functionalized biological fluidized bed for treating petroleum hydrocarbon pollutants, comprising a tank, an inner pipe, and a three-phase separation assembly, characterized in that, It also includes a feeding assembly and a circulation assembly; wherein the circulation assembly includes several circulation units arranged in a circumferential array, the circulation unit includes a circulation pipe and a circulation pump, the water inlet end of the circulation pipe passes through the tank and is located between the tank and the inner pipe, and the other end passes through the tank and is located inside the inner pipe, and a circulation pump is installed on the circulation pipe.

2. The functionalized biological fluidized bed for treating petroleum hydrocarbon pollutants according to claim 1, characterized in that, The tank is a hollow rotating cavity structure with a water outlet at the top and a mud outlet at the bottom. The bottom side of the tank slopes inward to form a frustum shape. The top of the bottom frustum shape of the tank is higher than the bottom of the inner tube.

3. The functionalized biological fluidized bed for treating petroleum hydrocarbon pollutants according to claim 1, characterized in that, The inlet end of the circulation pipe is provided with a cross-section inclined to the vertical plane, and a filter screen is provided at the inlet end.

4. The functionalized biological fluidized bed for treating petroleum hydrocarbon pollutants according to claim 1, characterized in that, The feeding assembly includes a water inlet pipe, an air inlet pipe, a water distribution component, and several nozzles; each nozzle includes an inner nozzle tube, an inner nozzle cone, an outer nozzle tube, and a connecting cross plate; the inner nozzle cone is an inverted cone shape and is located inside the inner nozzle tube; the inner nozzle tube is located inside the outer nozzle tube.

5. The functionalized biological fluidized bed for treating petroleum hydrocarbon pollutants according to claim 4, characterized in that, The inner tube, inner cone, and outer tube of the nozzle are coaxial and connected to each other at the top via the connecting cross plate. The height of the inner cone is less than the length of the outer tube, the length of the outer tube is less than the length of the inner tube, and the bottom of the outer tube is closed. The outer tube is connected to the air inlet pipe. The inner tube is connected to the water inlet pipe via a water distribution component.

6. The functionalized biological fluidized bed for treating petroleum hydrocarbon pollutants according to claim 4, characterized in that, The top of the nozzle outer tube is tilted inward, which reduces the gap between the top nozzle outer tube and the nozzle inner tube.

7. The functionalized biological fluidized bed for treating petroleum hydrocarbon pollutants according to claim 4, characterized in that, The other end of the circulation pipe is connected to the inlet pipe.

8. The functionalized biological fluidized bed for treating petroleum hydrocarbon pollutants according to claim 4, characterized in that, The water distribution component is frustum-shaped, including an outer side, an inner side, and a top surface. The outer side and the inner side are nested together. The top surface is disc-shaped, covering the top opening of the outer side. The outer nozzles are arranged in a circumferential array on the top surface. The inner tube of the nozzle is spatially connected to the outer side and the inner side. The inner tube of the nozzle located in the center passes through the top surface and is connected to the bottom of the inner side. The bottom of the outer side is connected to the water inlet pipe.

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