CN212833331U

CN212833331U - Bioreactor for sewage treatment

Info

Publication number: CN212833331U
Application number: CN202021471607.5U
Authority: CN
Inventors: 张绍延; 徐科; 熊梦辉; 邓林胜
Original assignee: China Petroleum and Chemical Corp; Sinopec Hubei Chemical Fertilizer Co
Current assignee: China Petroleum and Chemical Corp; Sinopec Hubei Chemical Fertilizer Co
Priority date: 2020-07-23
Filing date: 2020-07-23
Publication date: 2021-03-30
Anticipated expiration: 2030-07-23

Abstract

The utility model discloses a bioreactor for sewage treatment, which comprises a reaction box with a hollow structure, wherein a first baffle and a second baffle which are parallel to each other are sequentially arranged in the reaction box; two baffles divide into reaction box inside in proper order: an anoxic zone, an aerobic zone and a filtering separation zone; the reactor can fully utilize air, optimize mass transfer effect, is convenient to carry and disassemble, is favorable for industrialized popularization, is suitable for treating high-concentration oil refining and chemical sewage, and can also treat light industrial sewage and urban sewage so as to solve the problems of high energy consumption and difficult standard reaching of the conventional aerobic sewage treatment technology.

Description

Bioreactor for sewage treatment

Technical Field

The utility model belongs to the technical field of sewage treatment, concretely relates to a bioreactor for sewage treatment.

Background

With the rapid development of the coal chemical industry in China, the project of preparing ethylene glycol from coal also becomes the focus of attention, particularly in the field of ethylene glycol sewage treatment, the discharge amount of sewage is not large, but the water quality is complex, the toxicity is high, and nitrate nitrogen and COD are high. The traditional aerobic sewage treatment process mainly adopts an aeration tank technology, the technology is simple to operate and stable in operation, but the energy consumption and the operation cost are higher, the sewage treatment cost is high, the up-to-standard discharge of glycol sewage which is poor in biochemical property and difficult to degrade is difficult, and the problems are mainly caused by the fact that the aeration tank body is large, the air utilization rate is low, the sludge load is low, the impact resistance is poor, gas-liquid phases in the tank body are not well fluidized, and the sewage treatment is difficult to discharge up to the standard. The coal-to-ethylene glycol production device is continuously expanded and modified, the existing situations that the quantity of sewage is increased and the water quality is deteriorated cannot be met by the original sewage treatment device, and a new sewage process is urgently needed to be found for replacing the existing sewage process.

Disclosure of Invention

The utility model aims to solve the technical problem that a bioreactor for sewage treatment is provided, collect the oxygen deficiency, good oxygen and filtering separation are in an organic whole, can solve traditional sewage biochemical treatment technology air water than big, the energy consumption is high, the shortcoming of difficulty up to standard, this reactor can carry out make full use of to the air, optimize mass transfer effect, the transport is convenient with the dismantlement, be favorable to the industrialization to promote, this equipment is fit for handling oil refining and the chemical industry sewage of high concentration, also can handle light industry sewage and municipal sewage, it is high to solve current good oxygen sewage treatment technology energy consumption, difficult problem up to standard.

In order to realize the above design, the utility model adopts the following technical scheme: a bioreactor for sewage treatment comprises a reaction box with a hollow structure, wherein a first baffle and a second baffle which are of hollow flat plate structures are sequentially arranged in the reaction box; two baffles divide into reaction box inside in proper order: an anoxic zone, an aerobic zone and a filtering separation zone; the bottom of the first baffle plate is provided with an opening, and a first gate plate is arranged in the opening and matched with the sliding chute of the first baffle plate; the upper part of the second baffle is provided with an opening, and a second gate plate is arranged in the opening and matched with the sliding chute of the second baffle; the first gate plate and the second gate plate are both externally connected with a winch to do lifting motion.

In a preferred scheme, a water inlet and an air inlet are arranged on the upper surface of the anoxic zone; the air inlet is externally connected with a nitrogen tank; the bottom of the side surface of the anoxic zone is provided with an air outlet, and the inner wall of the anoxic zone at the inner side of the air outlet is paved with a waterproof breathable film.

In a preferred scheme, the top of the aerobic zone is connected with an exhaust pipe, and the bottom surface in the aerobic zone is provided with an aeration device; the aeration device comprises a main pipe of a rectangular frame loop structure, the inner side of the main pipe of the frame structure is connected with a plurality of mutually parallel branch pipes, and the surfaces of the branch pipes are provided with a plurality of holes for ventilation; the main pipe is connected with an aeration port arranged at the bottom of the side surface of the aerobic zone.

In the preferred scheme, a clapboard is arranged in the filtering and separating area, a filler layer is arranged above the clapboard, and a plurality of filtering balls with spherical structures are arranged in the filler layer; one side of the packing layer is provided with a water outlet, and the diameter of the water outlet is smaller than that of the filter ball; a sludge filtering plate parallel to the partition plate is arranged below the partition plate; a settling layer is arranged between the clapboard and the mud filtering plate; a back washing layer is arranged below the sludge filtering plate.

In a preferred scheme, the partition plate is of a flat plate structure, the surface of the flat plate structure is provided with a plurality of round holes with the same area, and the diameter of each round hole is smaller than that of each filter ball.

In a preferred scheme, the filter ball comprises a shell with a hollow spherical structure, a plurality of holes are formed in the surface of the shell, and activated sludge zoogloea is filled in the shell.

In a preferred scheme, the upper surface of the clapboard is connected with a plurality of stirring belts; the stirring belt comprises activated carbon, and the outer surface of the activated carbon is wrapped with a polyethylene film with holes.

In the preferred scheme, a plurality of ejectors are also arranged in the filtering and separating area; the ejector comprises a water pump positioned in the backwashing layer, one end of the water pump is connected with a water pipe, and the other end of the water pipe penetrates through the partition plate and the mud filter plate and extends out of the packing layer; one end of the water pipe, which is positioned on the packing layer, is connected with a jet flow nozzle.

In preferred scheme, sediment layer one side's reaction box side surface has seted up row's husky mouth, and it has the apron to articulate in the row's husky mouth, and apron one side is connected with the handle.

In a preferable scheme, a reflux pump is arranged in the filtering and separating area and is used for refluxing the mixed liquid to the anoxic area for denitrification treatment.

Compared with the prior art, the utility model, its beneficial effect lies in:

1, the device is totally enclosed, fully utilizes oxygen, and can effectively reduce the energy consumption of a fan by about 35 percent compared with the traditional aeration tank process; the anoxic zone is provided with an air inlet for injecting nitrogen, the air inlet is arranged above the anoxic zone, the air outlet is arranged below the anoxic zone due to the fact that the specific gravity wall of the nitrogen is small, the injected nitrogen can extrude all oxygen-containing air in the anoxic zone from the air outlet below the anoxic zone, and the waterproof and breathable film is laid on the air outlet to prevent sewage from flowing out, so that the anaerobic environment of the anoxic zone is ensured;

2, the aeration device at the bottom of the aerobic zone is arranged into a rectangular loop frame structure, air is fed from the main pipe, and a large number of micro bubbles can uniformly contact with sewage through the small air holes on the surfaces of the branch pipes which are uniformly distributed comprehensively, so that the contact area with the sewage and the oxygen dissolution amount in the sewage are increased, and the aerobic decomposition and decontamination effects are improved;

3, separating a packing layer in the filtering and separating area for adsorbing and cleaning the silt in the sewage, wherein a settling layer is used for collecting the silt washed by settling, and a jet device is arranged in a backwashing layer and used for repeatedly pumping the cleaned sewage into the packing layer for repeated cleaning; the filter balls move irregularly in the packing layer by matching with the partition plates, sewage sent from the aerobic zone is adsorbed and cleaned, and cleaned silt falls into a lower sedimentation layer under the action of gravity; the cleaned water falls into the back flushing layer at the lowest part and is pumped into the packing layer again by the ejector to be repeatedly flushed; meanwhile, the ejector is matched with the stirring belt, so that the irregular movement of the filter balls in the packing layer can be accelerated, and the efficiency of filtering and cleaning is improved;

4, a gate type baffle plate and a gate plate structure are arranged among the anoxic zone, the aerobic zone and the filtering separation zone, and the gate plate can be lifted or lowered through a small-sized winch or a motor, so that the connection among the anoxic zone, the aerobic zone and the filtering separation zone can be conveniently controlled; the treatment time of the sewage in each area can be conveniently controlled, so that the decontamination effect is enhanced.

Drawings

Fig. 1 is a front view of the present invention.

Fig. 2 is a sectional view taken along direction a of the present invention.

Fig. 3 is a schematic structural diagram of the first baffle plate and the first gate plate chute of the present invention.

Fig. 4 is a schematic structural view of the second baffle plate and the second gate plate sliding groove of the present invention.

Fig. 5 is a structural diagram of the filter ball of the present invention.

The reference numbers in the figures are: the device comprises a reaction box 1, a first baffle 2, a first gate plate 21, a second baffle 3, a second gate plate 31, an anoxic zone 4, a water inlet 41, an air inlet 42, an air outlet 43, a waterproof breathable film 44, an aerobic zone 5, an exhaust pipe 51, a main pipe 52, a branch pipe 53, an aeration port 54, a filtering separation zone 6, a partition plate 61, a packing layer 62, a filter ball 63, a shell 631, a sludge filter plate 64, a sedimentation layer 65, a backwashing layer 66, a sand discharge port 67, a water outlet 7, a stirring belt 8 and an ejector 9.

Detailed Description

Example 1:

as shown in fig. 1 to 5, a bioreactor for sewage treatment comprises a reaction tank 1 with a hollow structure, wherein a first baffle 2 and a second baffle 3 with a hollow flat plate structure are sequentially arranged in the reaction tank 1; two baffles divide into reaction box 1 inside in proper order: an anoxic zone 4, an aerobic zone 5 and a filtering separation zone 6; the bottom of the first baffle 2 is provided with an opening, and a first gate plate 21 is arranged in the opening and matched with the sliding chute of the first baffle 2; the upper part of the second baffle 3 is provided with an opening, and a second gate plate 31 is arranged in the opening and is matched with the sliding chute of the second baffle 3; the first gate plate 21 and the second gate plate 31 are both externally connected with a winch to perform lifting movement.

Preferably, the upper surface of the anoxic zone 4 is provided with a water inlet 41 and an air inlet 42; the air inlet 42 is externally connected with a nitrogen tank; the bottom of the side surface of the anoxic zone is provided with a gas outlet 43, and the inner wall of the anoxic zone at the inner side of the gas outlet 43 is paved with a waterproof breathable film 44.

Preferably, the top of the aerobic zone 5 is connected with an exhaust pipe 51, and the bottom surface in the aerobic zone 5 is provided with an aeration device; the aeration device comprises a main pipe 52 of a rectangular frame loop structure, the inner side of the main pipe 52 of the frame structure is connected with a plurality of branch pipes 53 which are parallel to each other, and the surfaces of the branch pipes 53 are provided with a plurality of holes for ventilation; the main pipe 52 is connected with an aeration port 54 arranged at the bottom of the side surface of the aerobic zone 5.

Preferably, a partition plate 61 is arranged in the filtering and separating area 6, a filler layer 62 is arranged above the partition plate 61, and a plurality of filtering balls 63 with spherical structures are arranged in the filler layer 62; a water outlet 7 is formed in one side of the packing layer 62, and the diameter of the water outlet 7 is smaller than that of the filter ball 63; a mud filter plate 64 parallel to the partition plate 61 is arranged below the partition plate 61; a settling layer 65 is arranged between the partition plate 61 and the mud filtering plate 64; below the filter mud plate 64 is a backwash layer 66.

Preferably, the partition 61 is a flat plate structure with a plurality of circular holes having the same area on the surface, and the diameter of the circular holes is smaller than that of the filter balls 63.

Preferably, the filter ball 63 includes a casing 631 having a hollow spherical structure, a plurality of holes are formed on the surface of the casing 631, and the casing 631 is filled with activated sludge zoogloea.

Preferably, the upper surface of the partition board 61 is connected with a plurality of stirring belts 8; the stirring belt 8 comprises activated carbon, and the outer surface of the activated carbon is wrapped with a polyethylene film with holes.

Preferably, a plurality of ejectors 9 are also arranged in the filtering and separating area 6; the ejector 9 comprises a water pump positioned in the backwashing layer 66, one end of the water pump is connected with a water pipe, and the other end of the water pipe penetrates through the partition plate 61 and the mud filtering plate 64 and extends out of the packing layer 62; one end of the water pipe, which is positioned on the packing layer 62, is connected with a jet flow nozzle.

Preferably, sediment layer 65 one side's reaction box 1 side surface is seted up row husky mouth 67, and it has the apron to articulate in row husky mouth 67, and apron one side is connected with the handle.

Example 2:

the working principle of the utility model is as follows:

firstly, sewage is sent into an anoxic zone from a water inlet 41, then nitrogen is filled from an air inlet 42, and the nitrogen above the anoxic zone gradually extrudes the air in the anoxic zone from an air outlet 43 at the bottom because the specific gravity of the nitrogen is smaller than that of the air; after a period of decomposition treatment is carried out in the anoxic zone, an external winch is controlled to lift the first gate plate 21, so that the sewage in the anoxic zone flows into the aerobic zone 5, and aerobic decomposition is carried out through the aeration device; after a period of time, the second gate plate 31 is lifted, so that the sewage in the aerobic zone 5 overflows to the filtering and separating zone 6 from the upper part, the sewage impacts the filtering balls 63 in the filling zone, the filtering balls 63 make irregular movement, activated sludge zoogloea in the filtering balls 63 adsorbs and cleans substances such as silt in the sewage, part of the flushed silt falls into the sedimentation layer 65 below from holes in the surface of the partition plate 61, and the filtering balls 63 play a certain blocking role in the movement process because the diameters of the holes in the surface of the partition plate 61 are smaller than those of the filtering balls 63, so that the silt in the sedimentation layer 65 is prevented from flowing back; the mud filter 64 makes the filtered water flow into the lowest back washing layer 66, and the ejector 9 pumps out the water almost without mud and sand in the back washing layer 66 and sprays the water into the packing layer 62 again for repeated filtering and washing.

Preferably, the diameter of the water outlet 7 is smaller than that of the filter ball 63, and the filter ball 63 can block the holes on the surface of the partition plate 61 during movement, so that the filter screen of the water outlet 7 is realized.

Preferably, the ejector 9 pumps out the water almost without silt in the backwash layer 66 and then injects the water into the packing layer 62 again, so that the sewage in the packing layer 62 can be subjected to water flow stirring, and the filter balls 63 can be accelerated to move irregularly by matching with the stirring belt 8 formed by the activated carbon, thereby improving the adsorption filtration efficiency.

Preferably, the first gate plate 21 and the second gate plate 31 can be in a normally open state, sewage is continuously sent into the reaction box 1, and sewage treatment operation with uninterrupted holding is performed, so that the sewage is in a flowing state in each area, the decomposition time of the sewage in the anoxic area and the aerobic area 5 is reduced, and the higher decontamination operation efficiency is obtained by sacrificing part of decontamination effects.

The above embodiments are merely preferred technical solutions of the present invention, and should not be considered as limitations of the present invention, and the features in the embodiments and the examples in the present application may be arbitrarily combined with each other without conflict. The protection scope of the present invention shall be defined by the claims and the technical solutions described in the claims, including the technical features of the equivalent alternatives as the protection scope. Namely, equivalent alterations and modifications within the scope of the invention are also within the scope of the invention.

Claims

1. A bioreactor for sewage treatment, characterized in that: the reaction device comprises a reaction box (1) with a hollow structure, wherein a first baffle (2) and a second baffle (3) with a hollow flat plate structure are sequentially arranged in the reaction box (1); two baffles divide into reaction box inside in proper order: an anoxic zone (4), an aerobic zone (5) and a filtering separation zone (6); the bottom of the first baffle (2) is provided with an opening, and a first gate plate (21) is arranged in the opening and is matched with the sliding chute of the first baffle (2); the upper part of the second baffle (3) is provided with an opening, and a second gate plate (31) is arranged in the opening and is matched with the sliding groove of the second baffle (3); the first gate plate (21) and the second gate plate (31) are both externally connected with a winch to do lifting movement.

2. A bioreactor for wastewater treatment according to claim 1, characterized in that: the following steps: the upper surface of the anoxic zone (4) is provided with a water inlet (41) and an air inlet (42); the air inlet (42) is externally connected with a nitrogen tank.

3. A bioreactor for wastewater treatment according to claim 1, characterized in that: the bottom of the side surface of the anoxic zone (4) is provided with a gas outlet (43), and a waterproof and breathable film (44) is laid on the inner wall of the anoxic zone (4) at the inner side of the gas outlet (43).

4. A bioreactor for wastewater treatment according to claim 1, characterized in that: the top of the aerobic zone (5) is connected with an exhaust pipe (51), and the bottom surface in the aerobic zone (5) is provided with an aeration device; the aeration device comprises a main pipe (52) of a rectangular frame loop structure, the inner side of the main pipe (52) of the frame structure is connected with a plurality of mutually parallel branch pipes (53), and the surface of each branch pipe (53) is provided with a plurality of holes for ventilation; the main pipe (52) is connected with an aeration opening (54) arranged at the bottom of the side surface of the aerobic zone (5).

5. A bioreactor for wastewater treatment according to claim 1, characterized in that: a partition plate (61) is arranged in the filtering and separating area (6), a filler layer (62) is arranged above the partition plate (61), and a plurality of filtering balls (63) with spherical structures are arranged in the filler layer (62); a water outlet (7) is formed in one side of the packing layer (62), and the diameter of the water outlet (7) is smaller than that of the filter ball (63); a mud filter plate (64) parallel to the partition plate (61) is arranged below the partition plate (61); a sedimentation layer (65) is arranged between the partition plate (61) and the mud filtering plate (64); a back washing layer (66) is arranged below the mud filtering plate (64).

6. A bioreactor for wastewater treatment according to claim 5, characterized in that: the baffle (61) is of a flat plate structure with a plurality of round holes with the same area formed in the surface, and the diameter of each round hole is smaller than that of the filter ball (63).

7. A bioreactor for wastewater treatment according to claim 5, characterized in that: the filter ball (63) comprises a shell (631) with a hollow spherical structure, a plurality of holes are formed in the surface of the shell (631), and activated sludge zoogloea is filled in the shell (631).

8. A bioreactor for wastewater treatment according to claim 5, characterized in that: the upper surface of the clapboard (61) is connected with a plurality of stirring belts (8); the stirring belt (8) comprises activated carbon, and the outer surface of the activated carbon is wrapped with a polyethylene film with holes.

9. A bioreactor for wastewater treatment according to claim 1, characterized in that: a plurality of ejectors (9) are also arranged in the filtering and separating area (6); the ejector comprises a water pump positioned in the backwashing layer (66), one end of the water pump is connected with a water pipe, and the other end of the water pipe penetrates through the partition plate (61) and the mud filtering plate (64) and extends out of the packing layer (62); one end of the water pipe, which is positioned on the packing layer (62), is connected with a jet flow nozzle.

10. A bioreactor for wastewater treatment according to claim 5, characterized in that: sediment layer (65) one side reaction box (1) side surface has seted up row husky mouth (67), and it has the apron to articulate in row husky mouth (67), and apron one side is connected with the handle.