Improved EGSB (expanded granular sludge bed) wastewater treatment equipment and method

Abstract

The invention discloses improved EGSB (Expanded Granular Sludge Bed) wastewater treatment equipment and a method thereof, and the improved EGSB wastewater treatment equipment comprises a tank body, a plurality of groups of mutually vertical three-phase separators arranged in an inner cavity of the tank body, a steam-water separator arranged at the top of the tank body, and a central pipe arranged at the bottom of the steam-water separator, the bottom of the central pipe penetrates through the three-phase separator and is provided with an umbrella-shaped backflow water distributor; a cleaning mechanism capable of cleaning a nozzle of the umbrella-shaped backflow water distributor is arranged in the center of the bottom of the tank body and comprises a motor cover provided with a motor and a disc arranged on the upper surface of the motor cover and connected with the motor in the motor cover. By arranging the cleaning mechanism, the spray heads of the umbrella-shaped backflow water distributor can be cleaned, blockage is prevented, the wastewater treatment effect is improved, meanwhile, wastewater can be stirred through a stirring rod in the cleaning process, the wastewater is more uniform, and the treatment efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of wastewater treatment, in particular to an improved EGSB wastewater treatment device and a method thereof. Background Art

[0002] The EGSB anaerobic reactor is a new type of anaerobic reactor after the UASB. It consists of a complete system of a water distributor, a three-phase separator, a gas collecting chamber and an external water inlet system. The organic matter in the wastewater entering the EGSB anaerobic reactor through the sewage pump is fully in contact with the sludge at the bottom of the anaerobic tank, and most of it is treated and absorbed. The high hydraulic load and high gas production load make the sludge and organic matter fully mixed. The sludge is in a fully expanded state, and the mass transfer rate is high, which greatly improves the anaerobic reaction rate and organic load. The generated biogas rises to the top and passes through the three-phase separator to separate the sludge, sewage and biogas. The EGSB anaerobic reactor is a new type of reactor developed on the basis of the UASB anaerobic reactor. The EGSB reactor makes full use of the anaerobic granular sludge technology, and provides the reactor with sufficient rising flow rate through external circulation to maintain the expansion of the granular sludge bed and the mixing inside the reactor.

[0003] The existing EGSB anaerobic reactor still has some defects. For example, the wastewater returned through the water distributor is not treated cleanly, which can easily clog the nozzle of the water distributor itself and affect the wastewater treatment effect. Based on this, we designed an improved EGSB wastewater treatment equipment that can clean the nozzle of the water distributor to prevent it from clogging and stir the wastewater. Summary of the invention

[0004] The object of the present invention is to provide an improved EGSB wastewater treatment equipment and method thereof to solve the above-mentioned problems existing in the prior art.

[0005] To achieve the above object, the present invention provides the following technical solutions: an improved EGSB wastewater treatment equipment, comprising a tank body, a plurality of mutually perpendicular three-phase separators arranged in the inner cavity of the tank body, a steam-water separator arranged on the top of the tank body, and a central tube arranged at the bottom of the steam-water separator, wherein an umbrella-shaped reflux water distributor is arranged at the bottom of the central tube penetrating the three-phase separator;

[0006] A cleaning mechanism capable of cleaning the nozzle of the umbrella-shaped reflux water distributor itself is arranged at the bottom center of the tank body. The cleaning mechanism includes a motor cover equipped with a motor, a disc arranged on the upper surface of the motor cover and connected to the motor inside the motor cover, and a detachable cleaning brush arranged on the circumference of the upper surface of the disc and corresponding to the nozzle of the umbrella-shaped reflux water distributor itself. Driven by the motor in the motor cover, the disc and the cleaning brush can be driven to rotate to clean the nozzle of the umbrella-shaped reflux water distributor itself.

[0007] In a preferred embodiment, a water outlet pipe is provided on one side of the top of the outer wall of the tank body, and a water inlet pipe is provided on one side of the bottom of the outer wall of the tank body.

[0008] In a preferred embodiment, a circulation pump is provided on one side of the outer wall of the tank body, and the water inlet and water outlet of the circulation pump are respectively provided with a circulation water inlet pipe and a circulation water outlet pipe, one end of the circulation water inlet pipe passes through the tank body and extends between two adjacent three-phase separators, and one end of the circulation water outlet pipe extends to the bottom of the inner cavity of the tank body.

[0009] In a preferred embodiment, an exhaust pipe is provided on one side of the top of the outer wall of the steam-water separator, an air inlet pipe is provided on the circumference of the outer wall of the steam-water separator, and an air collecting hood is provided at the bottom end of the air inlet pipe extending into the tank body.

[0010] In a preferred embodiment, a gasket is provided at the bottom of the three-phase separator, and a triangular plate connected to the inner wall of the tank is provided at the bottom circumference of the gasket and the top circumference of the three-phase separator.

[0011] In a preferred embodiment, the cleaning mechanism also includes a bottom ring arranged at the bottom of the inner cavity of the tank body, the interior of the bottom ring is rotatably connected to a support ring, and the top of the support ring is connected to the disc, the bottom of the support ring is provided with a connecting concave ring, and the inner cavity of the connecting concave ring is provided with a roller.

[0012] In a preferred embodiment, a concave plate is detachably provided on the circumference of the outer wall of the disk, and a stirring rod is detachably provided in the inner cavity of the concave plate.

[0013] A treatment method of an improved EGSB wastewater treatment equipment comprises the following steps:

[0014] S1, wastewater enters the tank through the water inlet pipe and flows upward;

[0015] S2. After the wastewater passes through the granular sludge bed to absorb the organic matter in the wastewater, the generated biogas and wastewater are separated through the three-phase separator;

[0016] S3, the circulation pump reintroduces part of the wastewater separated by the three-phase separator into the bottom of the tank for circulation and separation treatment;

[0017] S4. After the wastewater is separated and treated by multiple three-phase separators, it enters the steam-water separator through the gas collecting hood and the air inlet pipe. The steam-water separator separates the gas and discharges it from the exhaust pipe. The treated water returns to the bottom of the tank through the central pipe and the umbrella-shaped reflux water distributor;

[0018] S5. The motor in the motor cover starts, and the cleaning brush rotates to clean the nozzle of the umbrella-shaped reflux water distributor to prevent the sludge in the untreated clean wastewater from clogging the nozzle. At the same time, the stirring rod rotates to stir the wastewater to make it more uniform.

[0019] S6. After the final treatment is completed, the wastewater is discharged from the outlet pipe.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The cleaning mechanism of the present invention can clean the nozzle of the umbrella-shaped reflux water distributor to prevent blockage and improve the wastewater treatment effect. At the same time, the wastewater can be stirred by the stirring rod during the cleaning process to make the wastewater more uniform and improve the treatment efficiency;

[0022] 2. The present invention can make part of the wastewater circulate in the tank body through the setting of the circulation pump, thereby increasing the contact time between the wastewater and the granular sludge bed and improving the removal efficiency of organic matter. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a front cross-sectional view of the present invention;

[0024] Figure 2 It is a schematic diagram of the enlarged structure of A of the present invention;

[0025] Figure 3 It is a front cross-sectional view of the cleaning mechanism of the present invention;

[0026] Figure 4 The front cross-sectional view of the cleaning mechanism of the present invention after adding a stirring rod.

[0027] In the figure: 1. tank body; 101. water outlet pipe; 102. water inlet pipe; 103. circulation pump; 104. circulation water inlet pipe; 105. circulation water outlet pipe; 2. three-phase separator; 3. gas-water separator; 301. exhaust pipe; 302. air inlet pipe; 303. air collecting hood; 4. center pipe; 5. umbrella-shaped reflux water distributor; 6. triangular plate; 7. gasket; 8. cleaning mechanism; 801. motor cover; 802. disc; 803. cleaning brush; 804. bottom ring; 805. support ring; 806. connecting concave ring; 807. roller; 808. concave plate; 809. stirring rod. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] See also Figure 1-4 The present invention provides a technical solution: an improved EGSB wastewater treatment equipment, comprising a tank body 1, a plurality of mutually perpendicular three-phase separators 2 arranged in the inner cavity of the tank body 1, a steam-water separator 3 arranged on the top of the tank body 1, and a central tube 4 arranged at the bottom of the steam-water separator 3, wherein an umbrella-shaped reflux water distributor 5 is arranged at the bottom of the central tube 4 penetrating the three-phase separator 2;

[0030] A cleaning mechanism 8 capable of cleaning the nozzle of the umbrella-shaped reflux water distributor 5 is arranged at the bottom center of the tank body 1. The cleaning mechanism 8 includes a motor cover 801 equipped with a motor, a disc 802 arranged on the upper surface of the motor cover 801 and connected to the motor inside the motor, and a detachable cleaning brush 803 arranged on the circumference of the upper surface of the disc 802 and corresponding to the nozzle of the umbrella-shaped reflux water distributor 5. Driven by the motor in the motor cover 801, the disc 802 and the cleaning brush 803 can be driven to rotate to clean the nozzle of the umbrella-shaped reflux water distributor 5.

[0031] In specific implementation, in order to enable wastewater to enter and exit the tank body 1 , a water outlet pipe 101 is provided on one side of the top of the outer wall of the tank body 1 , and a water inlet pipe 102 is provided on one side of the bottom of the outer wall of the tank body 1 .

[0032] During specific implementation, a circulation pump 103 is provided on one side of the outer wall of the tank body 1, and a circulation water inlet pipe 104 and a circulation water outlet pipe 105 are provided at the water inlet and the water outlet of the circulation pump 103 respectively. One end of the circulation water inlet pipe 104 passes through the tank body 1 and extends between two adjacent three-phase separators 2, and one end of the circulation water outlet pipe 105 extends to the bottom of the inner cavity of the tank body 1. With such arrangement, the circulation pump 103 can make part of the wastewater circulate in the tank body 1, thereby increasing the contact time between the wastewater and the granular sludge bed and improving the removal efficiency of organic matter.

[0033] During specific implementation, an exhaust pipe 301 is provided on one side of the top of the outer wall of the steam-water separator 3, an air inlet pipe 302 is provided on the circumference of the outer wall of the steam-water separator 3, and the bottom end of the air inlet pipe 302 extends to the tank body 1 where a gas collecting hood 303 is provided. The steam-water separator 3 is used to separate the gas in the wastewater, and the separated gas is discharged through the exhaust pipe 301 to improve the wastewater treatment effect.

[0034] In specific implementation, a gasket 7 is provided at the bottom of the three-phase separator 2, and the bottom circumference of the gasket 7 and the top circumference of the three-phase separator 2 are provided with a triangular plate 6 connected to the inner wall of the tank body 1 by screws. The gasket 7 and the triangular plate 6 are used to support and fix the three-phase separator 2 to ensure its stability in the tank body 1.

[0035] In specific implementation, the cleaning mechanism also includes a bottom ring 804 arranged at the bottom of the inner cavity of the tank body 1, and the interior of the bottom ring 804 is rotatably connected to a support ring 805, and the top of the support ring 805 is connected to the disc 802, and the bottom of the support ring 805 is provided with a connecting concave ring 806, and the inner cavity of the connecting concave ring 806 is provided with a roller 807. The structure composed of the bottom ring 804, the support ring 805 and the roller 807 enables the disc 802 to rotate stably, thereby driving the cleaning brush 803 to clean the nozzle of the umbrella-shaped reflux water distributor 5 to prevent blockage.

[0036] In specific implementation, the outer wall circumference of the disc 802 is connected to a concave plate 808 by screws, and the inner cavity of the concave plate is connected to a stirring rod 809 by screws. The concave plate 808 and the stirring rod 809 can be disassembled and installed as needed. The stirring rod 809 stirs the wastewater to make the wastewater more uniform and improve the treatment efficiency.

[0037] The detailed connection means are well-known in the art. The following mainly introduces the working principle and process. The specific working principle is as follows:

[0038] During use, wastewater enters the tank body 1 through the water inlet pipe 102, flows upward through the granular sludge bed, and organic matter is absorbed and processed. The treated wastewater passes through the three-phase separator 2 for biogas and wastewater separation. The circulating pump 103 reintroduces part of the wastewater into the bottom of the tank body 1 through the circulating water inlet pipe 104 and the circulating water outlet pipe 105 for circulating separation treatment. After the wastewater is separated by multiple three-phase separators 2, it enters the gas-water separator 3 through the gas collecting hood 303 and the air inlet pipe 302 for treatment. The separated gas is discharged from the exhaust pipe 301, and the treated water returns to the bottom of the tank body 1 through the central pipe 4 and the umbrella-shaped reflux water distributor 5. The motor in the motor cover 801 is started, driving the disc 802 and the cleaning brush 803 to rotate to clean the nozzle of the umbrella-shaped reflux water distributor 5 to prevent sludge from clogging the nozzle. At the same time, the stirring rod 809 rotates to stir the wastewater to make the wastewater more uniform. After the final treatment is completed, the wastewater is discharged from the outlet pipe 101.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An improved EGSB wastewater treatment equipment, characterized in that: The invention comprises a tank body (1), a plurality of mutually perpendicular three-phase separators (2) arranged in the inner cavity of the tank body (1), a steam-water separator (3) arranged on the top of the tank body (1), and a central tube (4) arranged at the bottom of the steam-water separator (3); the bottom of the central tube (4) penetrates through the three-phase separator (2) and is provided with an umbrella-shaped reflux water distributor (5); A cleaning mechanism (8) capable of cleaning the nozzle of the umbrella-shaped reflux water distributor (5) is arranged at the bottom center of the tank body (1), and the cleaning mechanism (8) comprises a motor cover (801) equipped with a motor, a disc (802) arranged on the upper surface of the motor cover (801) and connected to the motor inside the motor cover, and a detachable cleaning brush (803) arranged on the circumference of the upper surface of the disc (802) and corresponding to the nozzle of the umbrella-shaped reflux water distributor (5). Driven by the motor in the motor cover (801), the disc (802) and the cleaning brush (803) can be driven to rotate to clean the nozzle of the umbrella-shaped reflux water distributor (5).

2. The improved EGSB wastewater treatment equipment according to claim 1, characterized in that: A water outlet pipe (101) is provided on one side of the top of the outer wall of the tank body (1), and a water inlet pipe (102) is provided on one side of the bottom of the outer wall of the tank body (1).

3. The improved EGSB wastewater treatment equipment according to claim 2, characterized in that: A circulation pump (103) is provided on one side of the outer wall of the tank body (1); a water inlet and a water outlet of the circulation pump (103) are respectively provided with a circulation water inlet pipe (104) and a circulation water outlet pipe (105); one end of the circulation water inlet pipe (104) passes through the tank body (1) and extends between two adjacent three-phase separators (2); one end of the circulation water outlet pipe (105) extends to the bottom of the inner cavity of the tank body (1).

4. The improved EGSB wastewater treatment equipment according to claim 3, characterized in that: An exhaust pipe (301) is arranged on one side of the top of the outer wall of the steam-water separator (3), an air intake pipe (302) is arranged on the circumference of the outer wall of the steam-water separator (3), and the bottom end of the air intake pipe (302) extends to the tank body (1) and is provided with an air collecting hood (303).

5. The improved EGSB wastewater treatment equipment according to claim 4, characterized in that: A gasket (7) is provided at the bottom of the three-phase separator (2), and a triangular plate (6) connected to the inner wall of the tank body (1) is provided at the bottom circumference of the gasket (7) and the top circumference of the three-phase separator (2).

6. The improved EGSB wastewater treatment equipment according to claim 5, characterized in that: The cleaning mechanism further comprises a bottom ring (804) arranged at the bottom of the inner cavity of the tank body (1); a support ring (805) is rotatably connected to the interior of the bottom ring (804); the top of the support ring (805) is connected to the disc (802); a connecting concave ring (806) is arranged at the bottom of the support ring (805); a roller (807) is arranged in the inner cavity of the connecting concave ring (806).

7. An improved EGSB wastewater treatment equipment according to any one of claims 1 to 6, characterized in that: The outer wall circumference of the disk (802) is detachably provided with a concave plate (808), and the inner cavity of the concave plate is detachably provided with a stirring rod (809).

8. A treatment method of an improved EGSB wastewater treatment equipment, characterized in that: The treatment method is applied to an improved EGSB wastewater treatment equipment as described in any one of claims 1 to 7, comprising the following steps: S1, wastewater enters the tank through the water inlet pipe and flows upward; S2. After the wastewater passes through the granular sludge bed to absorb the organic matter in the wastewater, the generated biogas and wastewater are separated through the three-phase separator; S3, the circulation pump reintroduces part of the wastewater separated by the three-phase separator into the bottom of the tank for circulation and separation treatment; S4. After the wastewater is separated and treated by multiple three-phase separators, it enters the steam-water separator through the gas collecting hood and the air inlet pipe. The steam-water separator separates the gas and discharges it from the exhaust pipe. The treated water returns to the bottom of the tank through the central pipe and the umbrella-shaped reflux water distributor; S5. The motor in the motor cover starts, and the cleaning brush rotates to clean the nozzle of the umbrella-shaped reflux water distributor to prevent the sludge in the untreated clean wastewater from clogging the nozzle. At the same time, the stirring rod rotates to stir the wastewater to make it more uniform. S6. After the final treatment is completed, the wastewater is discharged from the outlet pipe.

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