Sludge discharging device of sequencing batch reactor

Abstract

The utility model provides a sludge discharge device of a sequencing batch reactor, and belongs to the field of manufacturing of sludge treatment equipment. The device comprises a treatment tank, a spiral conveyor and a draining tank, the spiral conveyer comprises a conveying pipe and a motor; a conveying screw is mounted in the conveying pipe, and the conveying pipe is provided with an inlet and an outlet; the inlet corresponds to the bottom of the treatment tank, and a sludge pipe is arranged on the outlet; the outlet is connected with the draining tank through the sludge pipe; and the draining tank is fixed on one side above the treatment tank. According to the utility model, the sludge in the treatment tank is regularly conveyed into the draining tank through the screw conveyer for dehydration and natural drying, so that the occupied area is saved, the equipment investment is low, and the problem that the sludge of the sequencing batch reactor is difficult to regularly and automatically treat is well solved.

Description

Technical Field

[0001] The utility model relates to a sludge treatment device manufacturing technology, in particular to a sequencing batch reactor sludge discharge device, belonging to the technical field of water treatment equipment manufacturing. Background Art

[0002] The sequencing batch reactor activated sludge process (SBR, including its various variations, such as the CAST process) is a type of activated sludge process for sewage treatment. Its aeration, sedimentation and drainage are all completed in a group of tanks (i.e., SBR tanks). It is usually operated in a collaborative manner with two or four groups. It occupies an important position in the construction of domestic sewage treatment facilities because of its small footprint, few equipments, easy use and high degree of automation.

[0003] The general pool depth of the SBR process is about 6m to 7m. The pool is deep. During construction, generally about half of the pool is below the ground level, that is, the pool bottom is about 3-4m deep below the ground.

[0004] The sludge treatment in the prior art has the following problems: First, the water discharged from the SBR tank by gravity contains a large amount of sludge, so a separate sedimentation tank needs to be built for centralized treatment, which greatly increases the sludge treatment cost.

[0005] Secondly, if a sludge pump is installed in the SBR pool for extraction, the water content of the sludge is very high and it needs to be placed separately in a drying pool for dehydration and drying; and, since the SBR occupies a small area and the sludge reserves are not large, building a separate drying pool also increases the treatment cost.

[0006] Therefore, there is an urgent need in the prior art for a sludge discharge device that has low treatment cost and can effectively prevent excessive sludge from accumulating. Utility Model Content

[0007] The utility model provides a novel sludge discharge device for a sequencing batch reactor. By arranging a screw conveyor at the bottom, the sludge can be regularly cleaned to a drain tank, so as to solve the technical problem that the sludge of the sequencing batch reactor is difficult to be processed at low cost in the prior art.

[0008] The sludge discharge device of the sequencing batch reactor of the utility model embodiment comprises: a treatment tank, a screw conveyor and a drainage tank;

[0009] The screw conveyor comprises: a conveying pipe and a motor; a conveying screw is installed in the conveying pipe, and the conveying pipe has an inlet and an outlet; the inlet corresponds to the bottom of the treatment tank, and a sludge pipe is arranged on the outlet; the outlet is connected to the drain tank through the sludge pipe;

[0010] The drain tank is fixed on one side above the treatment tank.

[0011] As described above, in the sequencing batch reactor sludge discharge device, the horizontal cross-section of the treatment tank gradually decreases from top to bottom, and the screw conveyor is arranged at the bottom of the treatment tank.

[0012] The sludge discharge device for a sequencing batch reactor as described above, wherein the bottom of the sludge pipe is connected to the outlet, and the top of the sludge pipe is provided with a sludge outlet; the sludge outlet is located at the top of the drainage tank.

[0013] As described above, the sequencing batch reactor sludge discharge device, wherein an inclined drainage baffle is provided in the drainage tank, and a reflux port is provided at the bottom of the drainage tank; the reflux port is located below the drainage baffle and corresponds to the treatment tank.

[0014] The sludge discharge device for a sequencing batch reactor as described above, wherein the motor has a drive shaft; a rotating shaft is installed in the conveying pipe, and the conveying screw is fixedly installed on the rotating shaft; and the drive shaft is connected to the rotating shaft.

[0015] In the sequencing batch reactor sludge discharge device as described above, a bearing seat is provided at one end of the conveying pipe; one end of the rotating shaft is installed on the bearing seat, and the other end is connected to the motor through the driving shaft.

[0016] The sludge discharge device for a sequencing batch reactor as described above, wherein a plurality of ultrasonic transducers are arranged on the drainage baffle.

[0017] In the sequencing batch reactor sludge discharge device as described above, a water inlet and a water outlet are respectively provided on both sides of the treatment tank.

[0018] As described above, in the sequencing batch reactor sludge discharge device, a horizontally placed grid plate is provided in the treatment tank; the water inlet and the drain outlet are both located above the grid plate.

[0019] The sludge discharge device for a sequencing batch reactor as described above, wherein the sludge discharge device for a sequencing batch reactor further comprises: a Roots blower and a plurality of aeration devices; each of the aeration devices is arranged in the treatment tank and is located above the grid plate; each of the aeration devices has an air pipe, which is connected to the Roots blower through the air pipe;

[0020] Two vertical partitions are also arranged in the treatment pool, and the plurality of aeration devices are located between the two vertical partitions.

[0021] In the embodiment of the utility model, the sludge accumulated at the bottom of the treatment tank is regularly transported to the drain tank by a screw conveyor, and then dehydrated and dried by natural reflux, without the need to build additional sludge treatment facilities; at the same time, the separated water can naturally flow back to the treatment tank. The utility model not only saves space, but also reduces equipment investment, and well solves the problem that the sludge in the sequencing batch reactor is difficult to be automatically treated regularly. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a side structural diagram of a sequencing batch reactor sludge discharge device according to an embodiment of the utility model. DETAILED DESCRIPTION

[0023] The sequencing batch reactor sludge discharge device described in the utility model can be made of the following materials and components, but is not limited to the following materials and components, such as: aerators, screw conveyors, partitions, grid plates, drain plates, motors, rotating shafts, etc.

[0024] like Figure 1 The figure shows a side structural diagram of a sequencing batch reactor sludge discharge device according to an embodiment of the utility model; the sequencing batch reactor sludge discharge device according to this embodiment comprises: a treatment tank 1, a screw conveyor and a drain tank 5; the treatment tank 1 is generally a ground-fixed building, and its main structure is located below the horizontal plane.

[0025] The screw conveyor includes: a conveying pipe 2 and a motor 31; a conveying screw 3 is installed in the conveying pipe 2, and the conveying pipe 2 has an inlet 21 and an outlet 22; the inlet 21 corresponds to the bottom of the treatment tank 1, and a sludge pipe 4 is arranged on the outlet 22; the outlet 22 is connected to the drainage tank 5 through the sludge pipe 4; the sludge pipe 4 is vertically fixed on the outlet 22, and its top is located in the drainage tank 5.

[0026] The drain tank 5 is fixed on one side above the treatment tank 1 .

[0027] Generally, in order to enrich the sludge, the horizontal cross-section of the treatment tank 1 gradually decreases from top to bottom, and the screw conveyor is arranged at the bottom of the treatment tank 1. Thus, the sludge at the deepest part of the treatment tank 1 can smoothly enter the inlet 21 of the screw conveyor.

[0028] In actual use, depending on the amount of sewage to be treated, the screw conveyor is generally turned on once every 15 to 25 days, so that the sludge in the treatment tank 1 enters the drain tank 5 through the screw conveying action. Since the drain tank is small in size, no additional civil engineering costs are required, and the drain tank 5 is located above the treatment tank 1, which can also ensure that the drained water flows back to the treatment tank 1. In addition, at the end of each treatment cycle, the last sludge can already reach a lower water content, which is convenient for cleaning and transportation.

[0029] In the embodiment of the utility model, the sludge accumulated at the bottom of the treatment tank is regularly transported to the drain tank by a screw conveyor, and then dehydrated and dried by natural reflux, without the need to build additional sludge treatment facilities; at the same time, the separated water can naturally flow back to the treatment tank. The utility model not only saves space, but also reduces equipment investment, and well solves the problem that the sludge in the sequencing batch reactor is difficult to be automatically treated regularly.

[0030] Furthermore, the bottom of the sludge pipe 4 is connected to the outlet 22, and the top of the sludge pipe 4 has a sludge outlet 40; the sludge outlet 40 is located at the top of the drainage tank 5, so that the sludge with high water content can enter the bottom of the drainage tank 5 after being discharged from the sludge outlet 40, without causing the sludge outlet 40 to be blocked.

[0031] Preferably, an inclined drainage baffle 50 is provided in the drainage pool 5, and a return port 51 is provided at the bottom of the drainage pool 5; the return port 51 is located below the drainage baffle 50 and corresponds to the treatment pool 1. The inclined drainage baffle 50 can increase the contact area with the sludge, so that water can be drained out, and the drained water can enter the treatment pool 1 again through the return port 51, thereby saving the sludge treatment cost to the maximum extent.

[0032] In order to reduce maintenance costs and facilitate cleaning, a plurality of ultrasonic transducers are provided on the drain baffle 50 ; the ultrasonic transducers work intermittently, thereby improving the drainage efficiency and effectively preventing the drain baffle 50 from being blocked.

[0033] In the sludge discharge device for a sequencing batch reactor of this embodiment, the motor 31 has a driving shaft; a rotating shaft 30 is installed in the conveying pipe 2, and the conveying screw 3 is fixedly installed on the rotating shaft 30; the driving shaft is connected to the rotating shaft 30. Specifically, the rotating shaft 30 is connected to the driving shaft through a set of reduction gears, thereby increasing the torque of the rotating shaft 30.

[0034] Specifically, a bearing seat 32 is disposed at one end of the conveying pipe 2; one end of the rotating shaft 30 is mounted on the bearing seat 32, and the other end is connected to the motor 31 through the driving shaft.

[0035] In the sludge discharge device for a sequencing batch reactor of this embodiment, a water inlet 11 and a water outlet 12 are respectively provided on both sides of the treatment pool 1 .

[0036] Preferably, a horizontally placed grid plate 10 is provided in the treatment pool 1; the water inlet 11 and the drain outlet 12 are both located above the grid plate 10. The grid plate 10 has a large opening gap, mainly for the sedimentation of sludge and flocs, and to prevent the turbulence generated by the aeration above from affecting the sludge deposition under the grid plate 10.

[0037] The sludge discharge device for a sequencing batch reactor of this embodiment further includes: a Roots blower 61 and a plurality of aeration devices 6; the Roots blower 61 is fixed above the treatment tank 1. Each of the aeration devices 6 is arranged in the treatment tank 1 and is located above the grid plate 10; each of the aeration devices 6 has an air pipe 60, which is connected to the Roots blower 61 through the air pipe 60;

[0038] Two vertical partitions 16 are further provided in the treatment pool 1 , and the plurality of aeration devices 6 are located between the two vertical partitions 16 .

[0039] The two vertical partitions 16 mainly serve to isolate the aerated water flow and prevent excessive suspended matter generated by aeration from entering the drain port 12 .

[0040] In addition, the sequencing batch reactor sludge discharge device of the utility model has low construction cost, exquisite layout, compact structural design, easy to realize automatic operation, convenient maintenance and cleaning, and is suitable for sludge treatment of various small and medium-sized sequencing batch reactors.

[0041] The serial numbers of the above-mentioned embodiments of the utility model are only for description and do not represent the advantages and disadvantages of the embodiments. Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of some deformations plus the necessary general technology superposition; of course, it can also be implemented by simplifying some important technical features. Based on this understanding, the technical solution of the utility model is essentially or the part that contributes to the prior art is: the overall structure and connection method, and the structure described in each embodiment of the utility model.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A sludge discharge device for a sequencing batch reactor, characterized in that: include: treatment tanks, screw conveyors and drain tanks; The screw conveyor comprises: a conveying pipe and a motor; a conveying screw is installed in the conveying pipe, and the conveying pipe has an inlet and an outlet; the inlet corresponds to the bottom of the treatment tank, and a sludge pipe is arranged on the outlet; the outlet is connected to the drain tank through the sludge pipe; The drain tank is fixed on one side above the treatment tank.

2. The sludge discharge device of a sequencing batch reactor according to claim 1, characterized in that: The horizontal cross-section of the treatment pool gradually decreases from top to bottom, and the screw conveyor is arranged at the bottom of the treatment pool.

3. The sludge discharge device of a sequencing batch reactor according to claim 2, characterized in that: The bottom of the sludge pipe is connected to the outlet, and the top of the sludge pipe is provided with a sludge outlet; the sludge outlet is located at the top of the drainage pool.

4. The sludge discharge device for a sequencing batch reactor according to claim 3, characterized in that: An inclined drainage baffle is arranged in the drainage pool, and a reflux port is arranged at the bottom of the drainage pool; the reflux port is located below the drainage baffle and corresponds to the treatment pool.

5. The sludge discharge device for a sequencing batch reactor according to any one of claims 1 to 4, characterized in that: The motor has a driving shaft; a rotating shaft is installed in the conveying pipe, and the conveying screw is fixedly installed on the rotating shaft; the driving shaft is connected to the rotating shaft.

6. The sludge discharge device for a sequencing batch reactor according to claim 5, characterized in that: A bearing seat is arranged at one end of the conveying pipe; one end of the rotating shaft is installed on the bearing seat, and the other end is connected to the motor through the driving shaft.

7. The sludge discharge device for a sequencing batch reactor according to claim 4, characterized in that: A plurality of ultrasonic transducers are arranged on the drainage baffle.

8. The sludge discharge device for a sequencing batch reactor according to any one of claims 1 to 3, characterized in that: A water inlet and a water outlet are respectively arranged on both sides of the treatment pool.

9. The sludge discharge device for a sequencing batch reactor according to claim 8, characterized in that: A horizontally placed grid plate is arranged in the treatment pool; the water inlet and the drain outlet are both located above the grid plate.

10. The sludge discharge device of a sequencing batch reactor according to claim 9, characterized in that: The sequencing batch reactor sludge discharge device further comprises: a Roots blower and a plurality of aeration devices; each of the aeration devices is arranged in the treatment tank and is located above the grid plate; each of the aeration devices has an air pipe, which is connected to the Roots blower through the air pipe; Two vertical partitions are also arranged in the treatment pool, and the plurality of aeration devices are located between the two vertical partitions.

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