Sewage treatment system

Abstract

The utility model relates to a sewage treatment system which is characterized by comprising an aerobic tank, an aeration device, a cover plate and a plurality of cross beams which are arranged on the aerobic tank, a transverse plate connected with the cover plate and a stirring component arranged on the transverse plate, the cross beams support the cover plate and the transverse plate, two ends of the transverse plate are respectively positioned above the cross beams, and the aeration device is arranged on the aeration device. The stirring assembly is used for stirring sewage in the aerobic tank, and avoiding holes for avoiding the stirring assembly are formed in the cover plate and the transverse plate. The stirring assembly is arranged to improve the mixing effect of the sewage mixed liquid in the aerobic tank, and the aeration device is matched to control the dissolved oxygen in the aerobic tank to be in a low-concentration state, so that the sewage reaction is facilitated. The stirring assembly enables all substances in the sewage mixed liquid to be uniformly mixed, the aeration effect is improved, the oxygen supply requirement of the aeration device is also reduced, the use of electricity is reduced, and the cost is saved. The cross beam and the transverse plate are arranged to bear the weight of the stirring assembly and share the weight of the cover plate, so that the cover plate is prevented from cracking, and the stirring assembly can be stably mounted and used.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, and more specifically, to a sewage treatment system. Background Art

[0002] In sewage treatment, anaerobic, anoxic and aerobic zones are generally set up, wherein agitators are provided in the anaerobic and anoxic zones, and an aeration system is provided in the aerobic zone. Through aeration, the activated sludge in the aerobic zone is suspended in the water and placed in an aerobic environment. The activated sludge degrades organic matter, absorbs phosphates, nitrates NH3-N and other reactions under aerobic conditions, thereby achieving the sewage treatment effect. In actual operation, it is generally necessary to control the dissolved oxygen at the end of the aerobic zone to about 0.5 mg / L. It is often difficult to achieve the ideal state of process control for the control of dissolved oxygen and the mixing of mud and water by adjusting the air pipe valve of the aeration system alone, and too low aeration volume is prone to mud and water separation, and stirring equipment needs to be added to ensure that the dissolved oxygen in the aerobic zone reaches the required concentration. At the same time, the load-bearing capacity of the cover plate set on the top of the existing aerobic zone is weak, and the stirring equipment cannot be directly installed on the cover plate. Direct installation will cause problems such as cracking of the cover plate, resulting in unstable operation of the stirring equipment. Utility Model Content

[0003] The utility model provides a sewage treatment system to overcome the defects in the prior art that it is difficult to achieve the control requirement of dissolved oxygen concentration only by using an aeration system, and the cover plate of the aerobic zone cannot directly install a stirring device, and solves the above problems.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a sewage treatment system, including an aerobic tank, an aeration device arranged in the aerobic tank, a cover plate and multiple cross beams arranged on the aerobic tank, a cross plate connected to the cover plate and a stirring assembly installed on the cross plate, the cross beam provides support for the cover plate and the cross plate, both ends of the cross plate are respectively located above the cross beam, the stirring assembly is used to stir the sewage in the aerobic tank, and the cover plate and the cross plate are provided with air avoidance holes for avoiding the stirring assembly.

[0005] Specifically, the sewage treatment system also includes an anaerobic tank, an anoxic tank, an aerobic tank and a secondary sedimentation tank. During sewage treatment, the sewage is treated in the anaerobic tank, anoxic tank, aerobic tank and secondary sedimentation tank in turn. The top of the aerobic tank is provided with multiple beams, the bottom of the beams is flush with the edge of the aerobic tank, and the cover is placed above the beams and the aerobic tank. The beams provide support for the cover. On this basis, a cross plate is also provided, and the cross plate is provided between two or more beams, wherein the two ends of the cross plate refer to the two ends in the length direction of the cross plate, and then the stirring assembly is provided on the cross plate, and then an air-avoiding hole is provided so that the working end of the stirring assembly can be extended into the aerobic tank for stirring. The cross plate and the cross beam are used to bear the weight of the stirring assembly to avoid cracking of the cover, and to ensure the stable use of the stirring assembly. Furthermore, the cross plate and the stirring assembly are provided at the end of the aerobic tank. Specifically, the aeration device includes a blower. In the aerobic pool, the front and middle sections are acted upon by the aeration device, and the valve of the aeration device can be closed at the end section. At this time, the sewage mixture in the pool can still maintain a low dissolved oxygen concentration. At this time, the sewage mixture is fully stirred by the stirring component, and the oxygen supply of the blower is adjusted in real time according to the dissolved oxygen concentration. When the dissolved oxygen concentration is sufficient, the blower does not need to be turned on, which can reduce the power consumption of the blower and save power. The dissolved oxygen concentration in each part of the aerobic pool is made consistent by the stirring component, and the dissolved oxygen concentration is adjusted by the blower, so that the sewage reacts at a lower dissolved oxygen concentration to achieve the working effect.

[0006] Preferably, it further comprises a mounting frame connected to the transverse plate, the mounting frame is provided with a mounting hole, and the mounting frame is located above the air avoidance hole.

[0007] A mounting frame is arranged on the transverse plate for mounting the stirring assembly. The mounting frame further enhances the load-bearing capacity of the cover plate and the transverse plate, and also enables the stirring assembly to be fully fixed.

[0008] Preferably, the mounting frame includes a support rod connected to the transverse plate and a mounting plate connected to the support rod, and the mounting hole is arranged on the mounting plate.

[0009] The support rod is connected to the horizontal plate, and the mounting plate is used for installing the stirring assembly, wherein a plurality of support rods are provided, and the support rod and the mounting plate are preferably made of metal material to ensure structural strength.

[0010] Preferably, the transverse plate is a concrete plate, the lower portion of the support rod is cast and fixed in the transverse plate, and the mounting plate is detachably connected to the support rod.

[0011] When the cross plate is being cast, the support rod is placed therein and cast together to enhance the strength of the cross plate. The upper part of the support rod is detachably connected to the mounting plate, which is convenient for replacing the mounting plate and setting the mounting holes on the mounting plate.

[0012] Preferably, the stirring assembly includes a stirrer mounted on the mounting frame, a control box connected to the transverse plate, and a controller disposed in the control box, wherein the controller is signal-connected to the stirrer.

[0013] The stirring parts of the mixer pass through the air-avoiding holes and go deep into the aerobic pool for stirring. The control box protects the controller to prevent rainwater from soaking the controller.

[0014] Preferably, the control box includes a base connected to the horizontal plate, a vertical rod connected to the base and a box body connected to the vertical rod, the vertical rod is provided with a vertical through hole for accommodating the wires, and the bottom of the base is provided with a through groove connected to the vertical through hole.

[0015] The controller is installed in a box body, and an openable door is provided on the box body. More specifically, an opening is provided at the connection between the box body and the vertical rod, and an opening is also provided at the connection between the base and the vertical rod. The wires of the mixer enter the vertical through hole of the vertical rod from the through groove of the base, and then enter the box body to connect with the controller.

[0016] Preferably, the control box further comprises a vertical cylinder member connected to the base, a side surface of the vertical cylinder member is provided with an opening communicating with the through groove, the top of the vertical cylinder member is closed, and the bottom of the vertical cylinder member is connected to the cover plate.

[0017] The wires of the controller are routed from the vertical through holes of the vertical rods and extend into the through slots of the base, then enter into the vertical cylinders and extend onto the cover plate, and then are connected to an external power source.

[0018] Preferably, a groove communicating with the vertical cylinder member is provided on the top of the cover plate, the vertical cylinder member is communicated with the groove, and a closing cover is provided on the top of the groove.

[0019] The vertical cylinder is connected to the trench, which means that the cavity of the vertical cylinder is connected to the trench, and the wire extends from the vertical cylinder into the trench. The trench is provided to extend the wiring distance, and the closing cover is provided to cover the trench and protect the wire. The control box as a whole, the vertical cylinder, the trench and the closing cover all protect the wire.

[0020] Preferably, an observation hole is provided on the cover plate, and an observation cover is provided on the observation hole.

[0021] The observation hole is provided to facilitate the operator to observe the reaction conditions in the aerobic tank and to facilitate sampling, and the observation cover is used to cover the observation hole.

[0022] Preferably, danger signs are provided on the cover plate around the observation hole and on the observation cover.

[0023] Danger signs are set up to indicate the location of the observation hole and remind workers to be careful of the hole. Danger signs can be set up in the form of danger sign boards or danger sign tapes.

[0024] Compared with the prior art, the utility model has the following beneficial effects:

[0025] The stirring assembly is set to improve the mixing effect of the sewage mixture in the aerobic pool, and the dissolved oxygen in the aerobic pool can be controlled to be at a low concentration in conjunction with the aeration device, which is conducive to sewage reaction. The stirring assembly mixes the substances in the sewage mixture evenly, improves the aeration effect, and also reduces the oxygen supply demand of the aeration device, reduces the use of electricity, and saves costs. The crossbeam and cross plate are set to bear the weight of the stirring assembly, share the weight of the cover plate, avoid cracking of the cover plate, and also allow the stirring assembly to be stably installed and used. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of a sewage treatment system of the utility model;

[0027] Figure 2 It is a structural schematic diagram of a horizontal plate, a stirring assembly and an observation cover of a sewage treatment system of the utility model;

[0028] Figure 3 It is a schematic diagram of the structure of a trench and a control box of a sewage treatment system of the utility model;

[0029] Figure 4 It is a structural schematic diagram of a mounting frame of a sewage treatment system of the utility model;

[0030] Figure 5 The utility model is a structural schematic diagram of a hazard mark of a sewage treatment system.

[0031] In the figure: 1. aerobic pool; 2. cover plate; 201. groove; 3. cross beam; 4. cross plate; 401. air avoidance hole; 5. stirring assembly; 501. mixer; 502. control box; 5021. base; 5022. vertical rod; 5023. box body; 5024. vertical cylinder; 6. mounting frame; 601. support rod; 602. mounting plate; 7. mounting hole; 8. closing cover; 9. observation hole; 10. observation cover; 11. hazard sign. DETAILED DESCRIPTION

[0032] The drawings are only for illustrative purposes and cannot be construed as limiting the present invention. To better illustrate the present embodiment, some parts of the drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are only for illustrative purposes and cannot be construed as limiting the present invention.

[0033] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "long", "short" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0034] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0035] Example 1

[0036] like Figure 1 As shown, a sewage treatment system includes an aerobic tank 1, an aeration device arranged in the aerobic tank 1, a cover plate 2 and a plurality of cross beams 3 arranged on the aerobic tank 1, a cross plate 4 connected to the cover plate 2 and a stirring assembly 5 installed on the cross plate 4, the cross beam 3 provides support for the cover plate 2 and the cross plate 4, both ends of the cross plate 4 are respectively located above the cross beam 3, the stirring assembly 5 is used to stir the sewage in the aerobic tank 1, and the cover plate 2 and the cross plate 4 are provided with air avoidance holes 401 for avoiding the stirring assembly 5.

[0037] Specifically, the sewage treatment system also includes an anaerobic tank, an anoxic tank, an aerobic tank 1 and a secondary sedimentation tank. During sewage treatment, the sewage is sequentially treated in the anaerobic tank, the anoxic tank, the aerobic tank 1 and the secondary sedimentation tank. A plurality of beams 3 are provided on the top of the aerobic tank 1. The bottom of the beams 3 is flush with the edge of the aerobic tank 1. The cover plate 2 is placed above the beams 3 and the aerobic tank 1. The beams 3 provide support for the cover plate 2. On this basis, a cross plate 4 is also provided. The cross plate 4 is provided between two or more cross beams 3. The two ends of the cross plate 4 refer to the two ends in the length direction of the cross plate 4. Then, the stirring assembly 5 is provided on the cross plate 4. Then, an air avoidance hole 401 is provided so that the working end of the stirring assembly 5 extends into the aerobic tank 1 for stirring. The cross plate 4 and the cross beam 3 are used to bear the weight of the stirring assembly 5, so as to avoid cracking of the cover plate 2 and ensure the stability of the stirring assembly 5. Further, the cross plate 4 and the stirring assembly 5 are provided at the end of the aerobic tank 1. Specifically, the aeration device includes a blower. In the aerobic pool 1, the front section and the middle section are acted upon by the aeration device, and the valve of the aeration device can be closed at the end section. At this time, the sewage mixture in the pool can still maintain a low dissolved oxygen concentration. At this time, the sewage mixture is fully stirred by the stirring component 5, and the oxygen supply of the blower is adjusted in real time according to the dissolved oxygen concentration. When the dissolved oxygen concentration is sufficient, the blower does not need to be turned on, which can reduce the power consumption of the blower and save power. The dissolved oxygen concentration in each part of the aerobic pool 1 is made consistent by the stirring component 5, and the dissolved oxygen concentration is adjusted by the blower, so that the sewage reacts at a lower dissolved oxygen concentration to achieve the working effect.

[0038] Furthermore, the cover plate 2 is connected to two or more transverse plates 4 , and each transverse plate 4 is provided with a stirring assembly 5 .

[0039] Beneficial effects of this embodiment: The stirring assembly 5 is provided to improve the mixing effect of the sewage mixture in the aerobic tank 1, and the dissolved oxygen in the aerobic tank 1 can be controlled to be in a low concentration state in cooperation with the aeration device, which is beneficial to the sewage reaction. The stirring assembly 5 makes the substances in the sewage mixture mix evenly, promotes the aeration effect, and also reduces the oxygen supply demand of the aeration device, reduces the use of electricity, and saves costs. The crossbeam 3 and the cross plate 4 are provided to bear the weight of the stirring assembly 5, share the weight of the cover plate 2, avoid cracking of the cover plate 2, and also enable the stirring assembly 5 to be stably installed and used.

[0040] Example 2

[0041] like Figure 1-4 As shown, based on Example 1, the difference from Example 1 is that:

[0042] The invention also includes a mounting frame 6 connected to the horizontal plate 4, and a mounting hole 7 is provided on the mounting frame 6. The mounting frame 6 is located above the air-avoiding hole 401. The mounting frame 6 includes a support rod 601 connected to the horizontal plate 4 and a mounting plate 602 connected to the support rod 601, and the mounting hole 7 is provided on the mounting plate 602. The horizontal plate 4 is a concrete plate, and the lower part of the support rod 601 is cast and fixed in the horizontal plate 4, and the mounting plate 602 is detachably connected to the support rod 601. The mixing assembly 5 includes a mixer 501 installed on the mounting frame 6, a control box 502 connected to the horizontal plate 4, and a controller arranged in the control box 502, and the controller is connected to the mixer 501 by signal. The control box 502 includes a base 5021 connected to the horizontal plate 4, a vertical rod 5022 connected to the base 5021, and a box body 5023 connected to the vertical rod 5022, the vertical rod 5022 is provided with a vertical through hole for accommodating electric wires, and the bottom of the base 5021 is provided with a through groove connected to the vertical through hole. The control box 502 further includes a vertical cylinder 5024 connected to the base 5021. The side of the vertical cylinder 5024 is provided with an opening connected to the through slot. The top of the vertical cylinder 5024 is closed. The bottom of the vertical cylinder 5024 is connected to the cover plate 2. The top of the cover plate 2 is provided with a groove 201 connected to the vertical cylinder 5024. The vertical cylinder 5024 is connected to the groove 201. The top of the groove 201 is provided with a closing cover 8.

[0043] A mounting frame 6 is provided on the transverse plate 4 for the installation of the stirring assembly 5. The mounting frame 6 further enhances the load-bearing capacity of the cover plate 2 and the transverse plate 4, and also enables the stirring assembly 5 to be fully fixed. The support rod 601 is connected to the transverse plate 4, and the mounting plate 602 is used for the installation of the stirring assembly 5, wherein a plurality of support rods 601 are provided, and the support rod 601 and the mounting plate 602 are preferably made of metal materials to ensure the structural strength. When the transverse plate 4 is cast, the support rod 601 is placed therein and cast together to enhance the strength of the transverse plate 4. The upper part of the support rod 601 is detachably connected to the mounting plate 602, which is convenient for the replacement of the mounting plate 602, and is also convenient for setting the mounting holes 7 on the mounting plate 602. The stirring member of the mixer 501 passes through the air-avoiding hole 401 and goes deep into the aerobic pool 1 for stirring, and the control box 502 protects the controller to prevent the controller from being soaked by rainwater. The controller is installed in the box body 5023, and the box body 5023 is provided with an openable box door. More specifically, the connection part between the box body 5023 and the vertical rod 5022 is provided with an opening, and the connection part between the base 5021 and the vertical rod 5022 is also provided with an opening. The electric wires of the mixer 501 enter the vertical through hole of the vertical rod 5022 from the through groove of the base 5021, and then enter the box body 5023 to connect with the controller. The electric wires of the controller are routed from the vertical through hole of the vertical rod 5022 and extend into the through groove of the base 5021, and then enter the vertical cylinder 5024 and extend to the cover plate 2, and then connect with the external power supply. The vertical cylinder 5024 is connected with the digging groove 201, which means that the cavity of the vertical cylinder 5024 is connected with the digging groove 201, and the electric wires extend from the vertical cylinder 5024 to the digging groove 201. The digging groove 201 is provided to extend the wiring distance, and the closing cover 8 is provided to cover the digging groove 201 and protect the electric wires at the same time. The entire control box 502, the vertical cylinder 5024, the groove 201 and the closing cover 8 all protect the wires.

[0044] The remaining features and working principles of this embodiment are consistent with those of Embodiment 1.

[0045] Example 3

[0046] like Figure 2 and Figure 5 As shown, based on Example 1 or Example 2, Example 1 or Example 2 is further limited, and the difference is that:

[0047] The cover plate 2 is provided with an observation hole 9, and an observation cover 10 is provided on the observation hole 9. Danger signs 11 are provided around the observation hole 9 and on the observation cover 10 on the cover plate 2.

[0048] The observation hole 9 is provided for the convenience of the operator to observe the reaction in the aerobic tank 1 and also for sampling. The observation cover 10 is used to cover the observation hole 9. The danger sign 11 is provided to indicate the position of the observation hole 9 and remind the operator to be careful of the hole. The danger sign can be provided as a danger sign 11 plate or a danger sign 11 belt.

[0049] The rest of the working principle and working process of this embodiment are consistent with those of Embodiment 1 or Embodiment 2.

[0050] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not intended to limit the implementation methods of the utility model. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A sewage treatment system, characterized in that: The invention comprises an aerobic tank (1), an aeration device arranged in the aerobic tank (1), a cover plate (2) and a plurality of cross beams (3) arranged on the aerobic tank (1), a cross plate (4) connected to the cover plate (2), and a stirring assembly (5) installed on the cross plate (4), wherein the cross beam (3) provides support for the cover plate (2) and the cross plate (4), both ends of the cross plate (4) are respectively located above the cross beam (3), the stirring assembly (5) is used for stirring sewage in the aerobic tank (1), and air avoidance holes (401) for avoiding the stirring assembly (5) are provided on the cover plate (2) and the cross plate (4).

2. A sewage treatment system according to claim 1, characterized in that: It also comprises a mounting frame (6) connected to the transverse plate (4), the mounting frame (6) being provided with a mounting hole (7), and the mounting frame (6) being located above the air avoidance hole (401).

3. A sewage treatment system according to claim 2, characterized in that: The mounting frame (6) comprises a support rod (601) connected to the transverse plate (4) and a mounting plate (602) connected to the support rod (601), and the mounting hole (7) is arranged on the mounting plate (602).

4. A sewage treatment system according to claim 3, characterized in that: The transverse plate (4) is a concrete plate, the lower part of the support rod (601) is cast and fixed in the transverse plate (4), and the mounting plate (602) and the support rod (601) are detachably connected.

5. A sewage treatment system according to claim 2, characterized in that: The stirring assembly (5) comprises a stirrer (501) mounted on the mounting frame (6), a control box (502) connected to the transverse plate (4), and a controller arranged in the control box (502), wherein the controller is signal-connected to the stirrer (501).

6. A sewage treatment system according to claim 5, characterized in that: The control box (502) comprises a base (5021) connected to the horizontal plate (4), a vertical rod (5022) connected to the base (5021), and a box body (5023) connected to the vertical rod (5022), wherein the vertical rod (5022) is provided with a vertical through hole for accommodating electric wires, and the bottom of the base (5021) is provided with a through groove connected to the vertical through hole.

7. A sewage treatment system according to claim 6, characterized in that: The control box (502) further comprises a vertical cylinder member (5024) connected to the base (5021); a side of the vertical cylinder member (5024) is provided with an opening communicating with the through slot; the top of the vertical cylinder member (5024) is closed; and the bottom of the vertical cylinder member (5024) is connected to the cover plate (2).

8. A sewage treatment system according to claim 7, characterized in that: The top of the cover plate (2) is provided with a cutout (201) which is in communication with the vertical cylinder (5024); the vertical cylinder (5024) is in communication with the cutout (201); and a closing cover (8) is provided on the top of the cutout (201).

9. A sewage treatment system according to any one of claims 1 to 8, characterized in that: The cover plate (2) is provided with an observation hole (9), and the observation hole (9) is provided with an observation cover (10).

10. A sewage treatment system according to claim 9, characterized in that: Danger signs (11) are provided on the cover plate (2) around the observation hole (9) and on the observation cover (10).

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