An LBBR sewage treatment device and process with high processing efficiency and stable operation

Abstract

The present invention relates to the technical field related to sewage treatment, and discloses an LBBR sewage treatment device and process with high treatment efficiency and stable operation, including a pool body; a precipitation cone; a water inlet diversion mechanism; a pushing flow mechanism; an aeration mechanism; a reflux mechanism; a combined filler; a filler support, etc. Among them: an inlet, an inlet diversion pipe, an outlet, a sludge discharge port, and an air inlet are provided at the upper part of the pool body, and the inlet enters from the upper part of the pool body and is diverted to the bottom of the pool body by the inlet diversion pipe; The present invention realizes the reasonable zoning of the anaerobic zone, anoxic zone, aerobic zone, and precipitation zone of the tank-shaped sewage treatment equipment, greatly improves the treatment effect of the device, and makes the operation more stable; The present invention adopts the detachable connection of the precipitation cone, which can be assembled arbitrarily according to the operation requirements, reducing the construction cost; The present invention adopts the inverted cone design of the aerobic zone to improve the dissolved oxygen efficiency and the space for aerobic reaction, reducing the operation energy consumption.

Description

Technical Field

[0001] The present invention relates to the technical field related to sewage treatment, and specifically to an LBBR sewage treatment device and process with high treatment efficiency and stable operation. Background Art

[0002] With the improvement of living standards, sewage has changed from the original simplicity to diversification and complexity. Due to the different living differences between the north and the south, the changes in sewage quality and quantity are relatively large, resulting in the inability of the original sewage treatment devices and processes to meet the requirements of being applicable to both the north and the south, or the original equipment being unable to adapt to the sewage treatment with high concentration and large changes in water volume. Therefore, there is an urgent need to develop new sewage treatment devices and processes to meet the existing sewage treatment.

[0003] The original tank-shaped sewage treatment equipment is generally a sewage treatment equipment evolved from an IC reactor, and is an A / O process. The water inlet is from the bottom to the top, and the load of the water inlet lift pump is relatively large and the failure rate is relatively high. In the aerobic zone, due to the rising flow rate, the residence time is short, which cannot meet the reaction requirements. The water inlet in the sedimentation zone is mixed with the sludge sedimentation, disturbing the sedimentation effect and making the effluent turbid. The gas reflux cannot control the specific reflux volume, resulting in the entire pool body being an aerobic zone, unable to remove some pollutants and the effluent not meeting the standards. The original equipment does not reserve a maintenance position, and it cannot be repaired after the equipment is damaged. The aeration mechanism uses the original aeration head, which is prone to blockage and other disadvantages. Summary of the Invention

[0004] The purpose of the present invention is to provide an LBBR sewage treatment device and process with high treatment efficiency and stable operation, which is used to overcome the above-mentioned defects in the prior art.

[0005] The present invention is realized through the following technical solutions.

[0006] An LBBR sewage treatment device and process with high treatment efficiency and stable operation of the present invention includes a pool body; a sedimentation cone; a water inlet diversion mechanism; a pushing flow mechanism; an aeration mechanism; a reflux mechanism; a combined filler; a filler support, etc., wherein:

[0007] The upper part of the pool body is provided with a water inlet, a water inlet diversion pipe, a water outlet, a sludge discharge port, and an air inlet. After entering from the upper part of the pool body, the water inlet is diverted to the bottom of the pool body by the water inlet diversion pipe. The water outlet is lower than the water inlet by 200 - 300 mm, so that there is a certain liquid level difference inside the device to facilitate the rise of the liquid. The sludge discharge port includes a set of solenoid valves, and the sludge discharge port is arranged at a position 300 - 1000 mm below the water outlet.

[0008] The reflux mechanism includes a set of reflux centrifugal pumps, a reflux inlet pipe, and a reflux outlet pipe. The reflux centrifugal pumps are arranged on the top of the tank body. The reflux inlet pipe is arranged in the upper part of the tank body. The end height of the reflux outlet pipe is arranged above the inlet diversion pipe and below the vortex aerator.

[0009] The inside of the tank body is divided into an anaerobic zone, an anoxic zone, an aerobic zone, and a sedimentation zone by the inlet diversion pipe, the reflux outlet pipe, the aeration mechanism, and the sedimentation cone. A propeller maintenance hole, an inlet and outlet water observation hole, a sedimentation zone observation hole, and an aerobic zone observation hole are arranged on the top of the tank body.

[0010] In a further technical solution, the sedimentation cone is detachably connected to the top of the tank body. The conical structure of the sedimentation cone is beneficial to the sedimentation separation of the treated mixed liquid, and the special design also increases the space of the aerobic zone.

[0011] In a further technical solution, the sedimentation cone includes a set of cylindrical serrated weirs and a water inlet diversion mechanism in the sedimentation zone. The water inlet diversion mechanism is arranged in the lower part of the sedimentation cone. The water inlet diversion mechanism is designed with two layers at different angles. The first layer of the water inlet diversion mechanism has a larger angle between 60° and 55° for sludge sedimentation. The second layer of the water inlet diversion mechanism has a smaller angle between 40° and 55° for liquid flow. By the way of upper water inlet and lower sludge sedimentation, the influence of the rising water flow on sludge sedimentation is reduced. The cylindrical serrated weir is arranged in the upper part of the center of the sedimentation cone and is connected to the water outlet for self-flowing water, forming a water level difference between the inlet and outlet.

[0012] In a further technical solution, the propelling mechanism includes a hoisting device, a guide rail, a connecting towing rope, and a propeller. The hoisting device is fixed on the top of the tank body. The guide rail is installed in the propeller maintenance hole, fixed inside the tank body, and fixed at the bottom of the tank body. The connecting towing rope is connected from the hoisting device to the propeller. The propeller is installed on the guide rail and can move up and down or be taken out inside the tank body.

[0013] In a further technical solution, the aeration mechanism includes an aeration pipeline and a vortex aerator. The vortex aerator is arranged at the 3 / 2 position in the lower part of the tank body.

[0014] In a further technical solution, the propeller evenly mixes the sludge sedimented to the bottom of the tank body with the influent water. The centrifugal pump returns the upper liquid to the anoxic zone through the reflux inlet pipe to reach anoxic conditions for anoxic reaction. The liquid in the aerobic zone dissolves oxygen through the vortex aerator, and the oxygen dissolution efficiency is improved by the conical shape design.

[0015] For a further technical solution, the sludge discharge pipe is arranged upward from the boundary between the aerobic zone and the anoxic zone to the sludge discharge port, and the solenoid valve controls the sludge discharge time.

[0016] Since the sewage inside the tank body has the water inlet higher than the water outlet and is arranged from the upper part along the water inlet diversion pipe to the bottom, the sewage slowly rises in the tank body through the influent flow rate, increasing the residence time.

[0017] For a further technical solution, the influent of the sedimentation zone enters from the middle of the aerobic zone, avoiding the influence of the rising flow rate in the aerobic zone and increasing the residence time in the aerobic zone, enabling the sewage to undergo sufficient reaction.

[0018] For a further technical solution, the combined packing is arranged inside the tank body in the aerobic zone, at a position above the swirl aerator and below the liquid level, with the arrangement spacing between 100 - 400 mm. The combined packing can cut bubbles to improve the full contact between the liquid and the gas and provide aerobic colonization conditions for the work of microorganisms.

[0019] For a further technical solution, the moving biological bed packing is arranged in the anoxic zone, floating in the net-shaped packing carrier, and uses the reflux liquid and influent to carry out efficient denitrification reaction.

[0020] The present invention provides an LBBR sewage treatment device and process with high treatment efficiency and stable operation, including the following steps:

[0021] Step 1: After the sewage enters from the water inlet, it is diverted by the water inlet diversion pipe to the anaerobic zone at the bottom of the device. A pusher is used to mix the sedimented sludge and the influent evenly, and it rises uniformly to the anoxic zone through the influent pressure to mix with the denitrification reflux liquid, reaching anoxic conditions and providing the carbon source required for the biochemical reaction. The denitrifying bacteria colonize on the moving biological bed packing to expand the number of bacteria colonies and float in the net-shaped packing carrier to utilize the anoxic conditions for efficient denitrification reaction. The liquid level continues to rise through the influent pressure to reach the aerobic zone, where the oxygen is fully dissolved under the action of the aeration mechanism in the aerobic zone. The combined packing is used to cut bubbles to improve the full contact between the liquid and the gas and provide colonization conditions for the work of microorganisms, increasing the number of microorganisms. Technologically, the reaction volume is expanded to carry out more sufficient biochemical reactions, and the sewage and sludge rise upward to reach the sedimentation zone.

[0022] Step 2: The reacted sewage enters the sedimentation zone through the influent diversion mechanism in the sedimentation zone for sedimentation separation. The sludge descends by gravity and reattaches to the combined packing; the treated sewage enters along the cylindrical sawtooth weir and then flows out through the water outlet pipe to meet the discharge standard; when the sludge load is low, the sludge falls off from the packing and descends by gravity to reach the bottom of the device and is discharged through the sludge discharge pipe.

[0023] The beneficial effects of the present invention:

[0024] 1. The present invention realizes a reasonable partition of the anaerobic zone, anoxic zone, aerobic zone, and sedimentation zone of the tank-shaped sewage treatment equipment, greatly improving the treatment effect of the device and making the operation more stable.

[0025] 2. The present invention adopts a detachable connection of the sedimentation cone, which can be assembled arbitrarily according to the operation requirements, reducing the construction cost.

[0026] 3. The present invention adopts an inverted conical design in the aerobic zone to improve the dissolved oxygen efficiency and the space for aerobic reaction, reducing the operation energy consumption.

[0027] 4. The present invention installs a centrifugal pump at the top of the device for internal reflux, which is convenient for maintenance, and reasonably controls the reflux flow rate through a flow meter to ensure the treatment effect.

[0028] 5. The present invention adopts a water inlet diversion mechanism in the sedimentation zone. By means of upper water inlet and lower sludge sedimentation, the influence of the rising water flow on sludge sedimentation is reduced, and the treatment efficiency is improved.

[0029] 6. The present invention adopts a liftable method for installing the agitator, which is convenient for the maintenance and repair of subsequent equipment.

[0030] 7. The combined packing in the aerobic zone can cut bubbles to improve the full contact between liquid and gas and provide aerobic colonization conditions for the work of microorganisms. The moving biological bed packing in the anoxic zone floats in the mesh carrier and uses the reflux liquid and influent water to carry out efficient denitrification reaction; this device combines the advantages of fixed biological packing and moving biological packing, improving the efficiency and stability of the device operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0032] The following further illustrates the present invention in conjunction with the drawings and embodiments.

[0033] Figure 1 is the top view structural schematic diagram of the present invention;

[0034] Figure 2 is the front view structural schematic diagram of the present invention;

[0035] Figure 3 is the left view structural schematic diagram of the present invention;

[0036] Figure 4 is the internal liquid flow direction schematic diagram of the present invention;

[0037] Figure 5 It is a schematic diagram of the filler installation of the present invention;

[0038] In the figure: 1. Pool body; 2. Water inlet; 3. Inlet diversion pipe; 4. Return outlet pipe; 5. Return centrifugal pump; 6. Return inlet pipe; 8. Cylindrical sawtooth weir; 9. Precipitation cone; 10. Inlet water diversion mechanism; 11. Swirl aerator; 12. Sludge discharge pipe; 13. Outlet pipe; 14. Air inlet; 15. Outlet; 16. Sludge discharge port; 17. Solenoid valve; 18. Hoisting device; 19. Winch; 20. Towing rope; 21. Guide rail; 22. Pusher; 23. Composite filler; 24. Filler support; 25. Moving biological bed filler; 26. Filler carrier; 31. Aeration mechanism; 41. Pushing flow mechanism; 51. Return mechanism; a. Inlet and outlet observation hole; b. Precipitation area observation hole; c. Pusher maintenance hole; d. Aerobic area observation hole; e. Anaerobic area; f. Anoxic area; g. Aerobic area; h. Precipitation area; Specific embodiments

[0039] The following is combined with Figures 1-5 to describe the present invention in detail. For the convenience of narration, the orientation described below is defined as follows: The up, down, left, right, front and back directions described below are consistent with the up, down, left, right, front and back directions of the projection relationship of itself. Figure 1 itself projection relationship of the up, down, left, right, front and back directions consistent.

[0040] Combined with the attached Figures 1-5 The described LBBR sewage treatment device and process with high treatment efficiency and stable operation include a pool body 1; a precipitation cone 9; a precipitation area inlet water diversion mechanism 10; a pushing flow mechanism 41; an aeration mechanism 31; a return mechanism 51; a composite filler 23; a filler support 24, etc., wherein:

[0041] The upper part of the pool body 1 is provided with a water inlet 2, an inlet diversion pipe 3, an outlet 15, a sludge discharge port 16, and an air inlet 14. The water inlet 2 enters from the upper part of the pool body 1 and is diverted to the bottom of the pool body 1 by the inlet diversion pipe 3. The outlet 15 is lower than the water inlet 2 by 200 - 300 mm to make there be a certain liquid level difference inside the device to facilitate the rise of the liquid. The sludge discharge port 16 includes a set of solenoid valves 17, and the sludge discharge port 16 is arranged at a position 300 - 1000 mm below the outlet 15.

[0042] The return mechanism 51 includes a set of return centrifugal pumps 5, a return inlet pipe 6, and a return outlet pipe 4. The return centrifugal pumps 5 are arranged on the top of the pool body 1. The return inlet pipe 6 is arranged in the upper part of the pool body 1. The end height of the return outlet pipe 4 is arranged above the inlet diversion pipe 3 and below the swirl aerator 11.

[0043] The inner part of the tank body 1 is divided into an anaerobic zone e, an anoxic zone f, an aerobic zone g, and a sedimentation zone h by the water inlet diversion pipe 3, the return pipe outlet pipe 4, the aeration mechanism 31, and the sedimentation cone 9; on the top of the tank body 1, there are arranged a propeller maintenance hole c, an inlet and outlet water observation hole a, a sedimentation zone observation hole b, and an aerobic zone observation hole d.

[0044] The sedimentation cone 9 is detachably connected to the top of the tank body 1. The conical structure of the sedimentation cone 9 is beneficial to the sedimentation separation of the treated mixed liquid, and the special design also increases the space of the aerobic zone g.

[0045] The sedimentation cone 9 includes a set of cylindrical sawtooth weirs 8 and a water inlet diversion mechanism 10 for the sedimentation zone h. The water inlet diversion mechanism 10 is arranged at the lower part of the sedimentation cone 9; the water inlet diversion mechanism 10 is designed with two layers at different angles. The first layer of the water inlet diversion mechanism has a larger angle between 60° and 55° for sludge sedimentation, and the second layer of the water inlet diversion mechanism 10 has a smaller angle between 40° and 55° for liquid flow. By the way of upper water inlet and lower sludge sedimentation, the influence of the rising water flow on sludge sedimentation is reduced; at the upper part of the center of the sedimentation cone 9, the cylindrical sawtooth weir 8 is arranged and connected to the water outlet 15 for self-flowing water outlet, forming a liquid level difference between the inlet and outlet water.

[0046] The propelling mechanism 41 is composed of a hoisting device 18, a guide rail 21, a connecting towing rope 20, and a propeller 22. The hoisting device 18 is fixed to the top of the tank body 1. The guide rail 21 is installed in the propeller maintenance hole c, fixed inside the tank body 1 and fixed at the bottom of the tank body 1. The connecting towing rope 20 is connected from the hoisting device 18 to the propeller 22. The propeller 22 is installed on the guide rail 21 and can move up and down or be taken out inside the tank body 1.

[0047] The aeration mechanism 31 includes an aeration pipeline 14 and a swirl aerator 11. The swirl aerator 11 is arranged at the lower 3 / 2 position inside the tank body 1.

[0048] The propeller 22 evenly mixes the sludge sedimented to the bottom of the tank body 1 with the inlet water; the centrifugal pump 5 returns the upper liquid to the anoxic zone f through the return water inlet pipe 6 to reach anoxic conditions for anoxic reaction; the liquid in the aerobic zone g is dissolved with oxygen through the swirl aerator 11, and the oxygen dissolution efficiency is improved through the conical shape design.

[0049] The sludge discharge pipeline 12 is arranged upward from the boundary between the aerobic zone g and the anoxic zone f to the sludge discharge port 16 from the bottom, and the solenoid valve 17 controls the sludge discharge time.

[0050] Due to the fact that the sewage inside the tank body 1 has the water inlet 2 higher than the water outlet 15 and is arranged from the upper part along the water inlet diversion pipe 3 to the bottom, the sewage slowly rises in the tank body 1 through the influent flow rate, increasing the residence time.

[0051] The influent water of the sedimentation area h enters from the middle of the aerobic area g, avoiding the influence of the upward flow velocity in the aerobic area g and increasing the residence time of the aerobic area g, enabling the sewage to undergo a sufficient reaction.

[0052] The combined packing 23 is arranged inside the tank body in the aerobic area g, at a position above the swirl aerator 11 and below the liquid level, with the arrangement spacing between 100 - 400 mm. The combined packing 23 can cut bubbles to improve the full contact between the liquid and the gas and provide an aerobic settlement condition for the work of microorganisms.

[0053] The moving biological bed packing 25 is arranged in the anoxic area f, floating inside the reticulated packing carrier 26, and uses the reflux liquid and the influent water to carry out an efficient denitrification reaction.

[0054] The present invention provides an LBBR sewage treatment device and process with high treatment efficiency and stable operation, including the following steps:

[0055] Step 1: After the sewage enters from the water inlet 2, it is diverted by the water inlet diversion pipe 3 to the anaerobic area e at the bottom of the device. The pusher 22 is used to mix the sedimented sludge and the influent water evenly, and it rises uniformly to the anoxic area f through the influent pressure to be mixed with the denitrification reflux liquid, reaching an anoxic condition and providing the carbon source required for the biochemical reaction. The denitrifying bacteria settle on the moving biological bed packing 25 to expand the number of the bacterial population and float inside the reticulated packing carrier 26 to carry out an efficient denitrification reaction under anoxic conditions. The liquid level continues to rise through the influent pressure to reach the aerobic area g, and under the action of the aeration mechanism in the aerobic area g, oxygen is fully dissolved. The combined packing 23 is used to cut bubbles to improve the full contact between the liquid and the gas and provide a settlement condition for the work of microorganisms, increasing the number of microorganisms. Technologically, the reaction volume is expanded to carry out a more sufficient biochemical reaction, and the sewage and sludge rise upward to reach the sedimentation area h.

[0056] Step 2: The reacted sewage enters the sedimentation area h through the sedimentation area influent diversion mechanism 10 for sedimentation separation. The sludge descends by gravity and reattaches to the combined packing 23; the treated sewage enters along the cylindrical sawtooth weir 8 and then flows out through the water outlet pipe 15 to meet the discharge standard; when the sludge load is low, the sludge falls off from the packing by gravity and reaches the bottom of the device and is discharged through the sludge discharge pipe.

[0057] The above embodiments are only used to illustrate the technical concept and features of the present invention. The purpose is to enable those skilled in the art to understand the content of the present invention and implement it, and it cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. A LBBR sewage treatment device with high treatment efficiency and stable operation, Features: It includes a tank body, a sedimentation cone, a water diversion mechanism, a flow-pushing mechanism, an aeration mechanism, a reflux mechanism, a combined filler and a filler support, wherein: The upper part of the pool body is provided with a water inlet, a water inlet guide pipe, a water outlet, a mud discharge port and an air inlet. The water inlet enters from the upper part of the pool body and is guided to the bottom of the pool body by the water inlet guide pipe. The water outlet is 200-300mm lower than the water inlet so that there is a certain liquid level difference inside the device to facilitate the rise of the liquid. The mud discharge port includes a set of solenoid valves, and the mud discharge port is arranged 300-1000mm below the water outlet; The aeration mechanism includes an aeration pipeline and a cyclone aerator; The reflux mechanism includes a set of reflux centrifugal pumps, a reflux water inlet pipe, and a reflux water outlet pipe. The reflux centrifugal pump is arranged on the top of the tank body, the reflux water inlet pipe is arranged on the upper part of the tank body, and the end of the reflux water outlet pipe is arranged at a height above the water inlet guide pipe and below the cyclone aerator. The inner part of the tank body is divided into an anaerobic zone, an anoxic zone, an aerobic zone and a sedimentation zone by the water inlet guide pipe, the return pipe outlet pipe, the aeration mechanism and the sedimentation cone; the top of the tank body is provided with a flow pusher inspection hole, a water inlet and outlet observation hole, a sedimentation zone observation hole and an aerobic zone observation hole; The sedimentation cone is detachably connected to the top of the tank body, and the sedimentation cone adopts a conical structure which is conducive to the sedimentation and separation of the treated mixed liquid; The sedimentation cone includes a set of cylindrical sawtooth weirs and the water inlet diversion mechanism in the sedimentation area, and the water inlet diversion mechanism is arranged at the lower part of the sedimentation cone; the water inlet diversion mechanism is designed with two layers at different angles, the first layer of the water inlet diversion mechanism has a larger angle between 60° and 55° for sludge sedimentation, and the second layer of the water inlet diversion mechanism has a smaller angle between 40° and 55° for liquid circulation, and the water inlet at the upper part and the sludge sedimentation at the lower part reduce the influence of the rising water flow on the sludge sedimentation; The water inlet of the sedimentation zone enters from the middle of the aerobic zone, avoiding the influence of the rising flow velocity of the aerobic zone, increasing the residence time of the aerobic zone, and allowing the sewage to fully react; The inverted cone design of the aerobic zone improves the dissolved oxygen efficiency and the space for aerobic reaction, and reduces the operating energy consumption; The composite filler is arranged in the aerobic zone inside the tank body, located above the cyclone aerator and below the liquid level, with an arrangement interval between 100-400 mm. The composite filler can cut bubbles to make the liquid and gas fully contact and provide aerobic implantation conditions for microorganisms to work; The moving biological bed filler is arranged in the anoxic zone, and the moving biological bed filler floats in a mesh filler carrier.

2. A LBBR sewage treatment device with high treatment efficiency and stable operation according to claim 1, Features: The cylindrical sawtooth weir is arranged at the upper center of the sedimentation cone and is connected to the water outlet to allow water to flow out by gravity, thereby forming a level difference between the inlet and outlet water.

3. A LBBR sewage treatment device with high treatment efficiency and stable operation according to claim 1, Features: The flow-pushing mechanism is composed of a hoisting device, a guide rail, a connecting towing rope and a flow pusher. The hoisting device is fixed to the top of the tank body. The guide rail is installed in the maintenance hole of the flow pusher and fixed to the inner bottom of the tank body. The connecting towing rope is connected from the hoisting device to the flow pusher. The flow pusher is installed in the guide rail and can move up and down or be taken out inside the tank body.

4. A highly efficient and stable-running LBBR sewage treatment device according to claim 3, characterized in that: The swirl aerator is arranged at the 3 / 2 position in the lower part of the tank body.

5. A highly efficient and stable-running LBBR sewage treatment device according to claim 4, characterized in that: The flow pusher uniformly mixes the sludge deposited at the bottom of the tank body with the influent water; the reflux centrifugal pump returns the upper liquid to the anoxic zone through the reflux inlet pipe to achieve anoxic conditions for anoxic reaction; the liquid in the aerobic zone dissolves oxygen through the swirl aerator, and the conical shape design improves the oxygen dissolution efficiency.

6. A highly efficient and stable-running LBBR sewage treatment device according to claim 1, characterized in that: The sludge discharge pipe is arranged upward from the boundary between the aerobic zone and the anoxic zone to the sludge discharge port, and the solenoid valve controls the sludge discharge time.

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