Sewage treatment air floatation tank and sewage treatment method

Abstract

The invention relates to the technical field of sewage treatment, in particular to a sewage treatment air floatation tank and a sewage treatment method.The sewage treatment air floatation tank comprises an air floatation tank body and further comprises a conveying mechanism, a connecting pipe, a supporting column, a driving mechanism, an opening mechanism, a filter screen and a dredging plate, the filter screen is driven by the driving mechanism to move up and down in the air floatation tank body, and then the filter screen is opened or contracted through the opening mechanism; when the filter screen is used for pretreating the sewage for a long time, a large number of cleaned suspended matters can be accumulated on the filter screen, so that filter holes of the filter screen are blocked, at the moment, the filter screen is moved downwards to the dredging plate through the driving mechanism, and the filter screen is dredged through the dredging plate. And the dredging plate is used for dredging the blocked parts of the filter holes of the filter screen, so that the blocked parts of the filter holes of the filter screen can be automatically cleaned, the blocked parts of the filter holes of the filter screen do not need to be manually cleaned, and the labor amount of workers is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and in particular to a sewage treatment flotation tank and a sewage treatment method. Background Art

[0002] In the process of sewage treatment, it is usually necessary to use flotation technology to pre-treat the sewage, that is, to use a flotation tank to separate solid particles from water and wastewater. During the operation of the existing flotation tank, the water is static and the bubbles cannot be quickly merged with the impurities in the water, thereby reducing the working efficiency and functionality of the device.

[0003] Prior art CN213977045U discloses a flotation tank for sewage treatment. By setting a motor and a swirl disk, during the operation of the device, the motor drives the swirl disk to rotate, so that the water in the flotation tank forms a swirl, and then the bubbles and suspended matter in the water can be quickly merged, thereby improving the working efficiency and functionality of the device.

[0004] However, when the above-mentioned flotation tank uses a filter to clean the debris on the water surface, a large amount of debris will accumulate on the filter, causing the filter holes on the filter to be easily blocked. After the blockage, the blocked filter holes of the filter need to be manually cleaned, thereby increasing the workload of the staff. Summary of the invention

[0005] The object of the present invention is to provide a sewage treatment flotation tank and a sewage treatment method, which solves the technical problem that when a filter screen is used in an existing flotation tank to clean debris on the water surface, a large amount of debris will accumulate on the filter screen, causing the filter holes on the filter screen to be easily blocked. After the blockage, the blocked filter holes of the filter screen need to be manually cleaned, thereby increasing the workload of the staff.

[0006] To achieve the above-mentioned objectives, in a first aspect, the present invention provides a sewage treatment flotation tank, comprising a flotation tank, and also comprising a transmission mechanism, a connecting pipe, a support column, a driving mechanism, an opening mechanism, a filter screen and a dredging plate. The transmission mechanism is located outside the flotation tank and is used to discharge sewage into the flotation tank, or to discharge sewage in the flotation tank. The connecting pipe is connected to the flotation tank and is located outside the flotation tank, and the connecting pipe is connected to an external bubble generator. The supporting column is arranged below the flotation tank. The driving mechanism is used to drive the opening mechanism to move up and down in the flotation tank. The opening mechanism is used to open or close the filter screen. The filter screen and the dredging plate are both located in the flotation tank, and the filter screen is located above the dredging plate.

[0007] Wherein, the transmission mechanism includes a water inlet pipe and a drain pipe, both of which are connected to the flotation tank, the water inlet pipe is located above the connecting pipe outside the flotation tank, and the drain pipe is located on a side outside the flotation tank away from the water inlet pipe.

[0008] Among them, the driving mechanism includes a driving motor, a screw and a guide ring. The driving motor is arranged at the central position below the flotation tank. The screw is connected to the output shaft of the driving motor and passes through the flotation tank. The guide ring is movably connected to the screw and is located outside the screw.

[0009] Wherein, the opening mechanism includes a mounting ring and a mounting bolt, the mounting ring is detachably connected to the guide ring and is sleeved outside the guide ring, and the mounting bolt is detachably connected to the mounting ring, abuts against the guide ring, and passes through the mounting ring.

[0010] Wherein, the filter screen comprises support rods and filter plates, the support rods are evenly and movably arranged outside the mounting ring, and the filter plate is arranged between two adjacent support rods and movably arranged outside the mounting ring.

[0011] Wherein, the opening mechanism further comprises a hydraulic rod, an output end of the hydraulic rod is connected to the support rod, and the hydraulic rod is arranged outside the mounting ring.

[0012] In a second aspect, the present invention also provides a sewage treatment method using a sewage treatment flotation tank, comprising the following steps:

[0013] The sewage is transferred from the water inlet pipe to the flotation tank. At the same time, the bubbles generated by the bubble generator are transferred to the flotation tank through the connecting pipe and merged with the suspended matter in the sewage.

[0014] During the fusion process, the drive motor is started, and the drive motor drives the screw to rotate along its own axis, driving the dredging plate to rotate along its own axis, thereby driving the sewage to form a vortex, accelerating the fusion speed of the bubbles and the suspended matter in the sewage;

[0015] At the same time, as the screw rotates along its own axis, the guide ring is driven to move along the trajectory of the thread outside the screw, thereby driving the mounting ring to move up and down in the air flotation tank, and further driving the filter to move up and down in the air flotation tank;

[0016] When the filter screen moves up and down, the hydraulic rod is started to drive the filter screen to rotate outside the mounting ring, so as to open or contract the filter screen, thereby ejecting and cleaning the suspended matter in the sewage;

[0017] After the suspended matter is pushed out and cleaned, the treated sewage is discharged from the outlet pipe to the outside of the flotation tank, completing the entire sewage treatment process.

[0018] The present invention relates to a sewage treatment flotation tank and a sewage treatment method. The filter screen is driven by the driving mechanism to move up and down in the flotation tank, so that the filter screen can move above or below the water surface. The filter screen is opened or contracted by the opening mechanism, so that the filter screen can push out and clean the suspended matter in the sewage, thereby realizing the pretreatment of the sewage. In the process of long-term use of the filter screen for pretreatment of sewage, a large amount of suspended matter cleaned out will accumulate on the filter screen, which causes the filter holes of the filter screen to be blocked. The filter screen is moved down to the drainage hole by the driving mechanism. The dredging plate is used to dredge the blocked parts of the filter holes of the filter screen, thereby realizing automatic cleaning of the blocked parts of the filter holes of the filter screen, and no manual cleaning is required for the blocked parts of the filter holes of the filter screen, thereby reducing the workload of the staff and solving the technical problem that when the filter screen is used to clean the debris on the water surface in the existing flotation tank, a large amount of debris will accumulate on the filter screen, causing the filter holes on the filter screen to be easily blocked. After being blocked, it is necessary to manually clean the blocked parts of the filter holes of the filter screen, thereby increasing the workload of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0020] Figure 1 It is a schematic diagram of the overall structure of the sewage treatment flotation tank according to the first embodiment of the present invention.

[0021] Figure 2 It is a schematic cross-sectional view along the water inlet pipe of the first embodiment of the present invention.

[0022] Figure 3 It is a schematic cross-sectional view along the guide ring of the first embodiment of the present invention.

[0023] Figure 4 1 is a schematic cross-sectional view along the mounting bolt of the first embodiment of the present invention.

[0024] Figure 5 It is a flow chart of the sewage treatment method of the sewage treatment flotation tank according to the second embodiment of the present invention.

[0025] In the figure: 101-flotation tank, 102-connecting pipe, 103-support column, 104-dredge plate, 105-water inlet pipe, 106-drain pipe, 107-drive motor, 108-screw, 109-guide ring, 110-mounting ring, 111-mounting bolt, 112-hydraulic rod, 113-support rod, 114-filter plate, 115-rod part, 116-threaded part, 117-rotating ring, 118-limiting ring, 119-dredge rod, 120-filter hole. DETAILED DESCRIPTION

[0026] Embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be construed as limiting the present invention.

[0027] First embodiment:

[0028] See also Figures 1 to 4 The present invention provides a sewage treatment flotation tank, including a flotation tank 101, a transmission mechanism, a connecting pipe 102, a support column 103, a driving mechanism, an opening mechanism, a filter screen and a dredging plate 104, wherein the transmission mechanism includes an inlet pipe 105 and a drain pipe 106, the driving mechanism includes a driving motor 107, a screw 108 and a guide ring 109, the opening mechanism includes a mounting ring 110, a mounting bolt 111 and a hydraulic rod 112, and the filter screen includes a support rod 113 and a filter plate 114.

[0029] In this embodiment, the filter screen is driven by the driving mechanism to move up and down in the flotation tank 101, so that the filter screen can be moved above or below the water surface, and the filter screen is opened or contracted by the opening mechanism, so that the filter screen can be ejected and cleaned from the suspended matter in the sewage, thereby realizing the pretreatment of the sewage. In the process of long-term use of the filter screen for pretreatment of sewage, a large amount of suspended matter cleaned out will accumulate on the filter screen, which causes the filter hole 120 of the filter screen to be blocked. The filter screen is moved down to the dredging plate 104 by the driving mechanism, and the dredging plate is used to open or contract the filter screen. 104 dredges the clogged portions of the filter holes 120 of the filter, thereby realizing automatic cleaning of the clogged portions of the filter holes 120 of the filter, and eliminating the need for manual cleaning of the clogged portions of the filter holes 120 of the filter, thereby reducing the workload of the staff and solving the problem that when the existing flotation tank 101 uses a filter to clean the debris on the water surface, a large amount of debris will accumulate on the filter, causing the filter holes 120 on the filter to be easily clogged. After being clogged, it is necessary to manually clean the clogged portions of the filter holes 120 of the filter, thereby increasing the workload of the staff.

[0030] The transmission mechanism is located outside the flotation tank 101, and is used to discharge sewage into the flotation tank 101, or to discharge sewage in the flotation tank 101. The connecting pipe 102 is connected to the flotation tank 101 and is located outside the flotation tank 101. The connecting pipe 102 is connected to the bubble generator in the outside world. The support column 103 is arranged below the flotation tank 101. The driving mechanism is used to drive the opening mechanism to move up and down in the flotation tank 101. The opening mechanism is used to open or close the filter screen. The dredging plate 104 is located in the flotation tank 101, and the filter is located above the dredging plate 104. The flotation tank 101, the connecting pipe 102 and the external bubble generator are connected in sequence, so that after the external bubble generator is started, the bubbles generated can be transmitted from the connecting pipe 102 to the flotation tank 101 and merged with the sewage in the flotation tank 101. The number of the support columns 103 is four, and they are evenly distributed below the flotation tank 101, so that the support columns 103 can support the flotation tank 101.

[0031] Secondly, the water inlet pipe 105 and the drainage pipe 106 are both connected to the flotation pool 101. The water inlet pipe 105 is located above the connecting pipe 102 outside the flotation pool 101, and the drainage pipe 106 is located on the side outside the flotation pool 101 away from the water inlet pipe 105. Since the water inlet pipe 105 and the drainage pipe 106 are both connected to the flotation pool 101, sewage can be transmitted from the water inlet pipe 105 to the flotation pool 101, and after pre-treatment in the flotation pool 101, it is discharged from the drainage pipe 106 to the outside of the flotation pool 101.

[0032] Again, the drive motor 107 is arranged at the central position below the flotation pool 101, the screw 108 is connected to the output shaft of the drive motor 107 and passes through the flotation pool 101, the guide ring 109 is movably connected to the screw 108 and is located outside the screw 108, the screw 108 has a rod 115 and a threaded portion 116, the dredging plate 104 is fixed outside the rod 115 of the screw 108, the guide ring 109 is movably arranged outside the threaded portion 116 of the screw 108, a rotating ring 117 is arranged outside the screw 108, the flotation pool 101 has a rotating groove, the rotating ring 117 of the screw 108 is located in the rotating groove of the flotation pool 101, and rotates along its own axis in the rotating groove of the flotation pool 101, so as to achieve the sealing of the rotating groove of the flotation pool 101 , to prevent the sewage in the flotation tank 101 from falling onto the drive motor 107 and affecting the normal use of the drive motor 107. A limit ring 118 is removably provided at the upper end of the screw 108. The limit ring 118 is used to limit the limit position of the guide ring 109 moving along the trajectory of the thread outside the screw 108 to avoid the guide ring 109 slipping out of the screw 108 when moving outside the screw 108. The output shaft of the drive motor 107 is connected to the screw 108 and drives the screw 108 to rotate along its own axis. The screw 108 has an external thread, and the guide ring 109 has an internal thread, so that the guide ring 109 can move along the trajectory of the thread outside the screw 108, thereby allowing the guide ring 109 to move up and down in the flotation tank 101.

[0033] At the same time, the mounting ring 110 is detachably connected to the guide ring 109 and is sleeved outside the guide ring 109. The mounting bolt 111 is detachably connected to the mounting ring 110 and abuts against the guide ring 109 and penetrates the mounting ring 110. The mounting ring 110 is arranged outside the guide ring 109, and then the mounting ring 110 is installed outside the guide ring 109 by the mounting bolt 111, so that the filter can be installed outside the guide ring 109.

[0034] In addition, the support rods 113 are evenly and movably arranged outside the mounting ring 110, the filter plate 114 is arranged between two adjacent support rods 113 and is movably arranged outside the mounting ring 110, the dredging plate 104 has a dredging rod 119, and the filter plate 114 has filter holes 120. The number of the dredging rods 119 and the filter holes 120 are consistent, and the positions of the dredging rods 119 and the filter holes 120 correspond one to one. The dredging rods 119 are inserted into the filter holes 120 one by one to dredge the blockages in the filter holes 120.

[0035] Finally, the output end of the hydraulic rod 112 is connected to the support rod 113, and the hydraulic rod 112 is arranged outside the mounting ring 110. Since the output end of the hydraulic rod 112 is connected to the support rod 113 and drives the support rod 113 to rotate outside the mounting ring 110, the filter plate 114 is driven to rotate outside the mounting ring 110, thereby realizing the opening or contraction of the filter screen.

[0036] When using a sewage treatment flotation tank of the present embodiment, the mounting ring 110 is sleeved outside the guide ring 109, and then the mounting ring 110 is installed outside the guide ring 109 by the mounting bolts 111, so that the filter can be installed outside the guide ring 109, and the filter is installed. After that, the sewage storage tank is connected with the water inlet pipe 105, so that the sewage stored in the sewage storage tank can be transmitted from the water inlet pipe 105 to the flotation tank 101. At the same time, the flotation tank 101, the connecting pipe 102 and the external bubble generator are connected in sequence, and the bubble generator is started, so that the bubbles generated by the bubble generator are transmitted to the flotation tank 101 through the connecting pipe 102, and merged with the suspended matter in the sewage in the flotation tank 101.

[0037] During the fusion process, the drive motor 107 is started so that the power output by the output shaft of the drive motor 107 drives the screw 108 to rotate along its own axis, thereby driving the dredging plate 104 to rotate along its own axis in the flotation tank 101 through the rod portion 115 of the screw 108, thereby driving the sewage in the flotation tank 101 to form a vortex, thereby accelerating the fusion speed of the bubbles in the flotation tank 101 and the suspended matter in the sewage.

[0038] At the same time, since the screw 108 rotates along its own axis, it drives the guide ring 109 to move along the trajectory of the thread outside the screw 108, so that the guide ring 109 can move up and down in the flotation tank 101, and then drive the installation ring 110 to move up and down in the flotation tank 101. Through the up and down movement of the installation ring 110 in the flotation tank 101, the filter can be driven to move up and down in the flotation tank 101.

[0039] During the up and down movement of the filter screen, the hydraulic rod 112 is started so that the power output from the output end of the hydraulic rod 112 drives the filter screen to rotate outside the mounting ring 110, thereby opening or contracting the filter screen. Through the opening or contraction of the filter screen and the up and down movement of the filter screen in the flotation tank 101, the suspended matter in the sewage in the flotation tank 101 can be ejected and cleaned.

[0040] After the suspended matter in the sewage in the flotation tank 101 is pushed out and cleaned, the treated sewage is discharged from the outlet pipe to the outside of the flotation tank 101, thereby completing the entire pretreatment process of the sewage. When the dredging plate 104 cannot completely dredge the blocked filter holes 120 of the filter screen, the filter screen is moved upward, and the mounting bolts 111 are gradually screwed out of the threaded holes of the mounting ring 110 and the guide ring 109, so that the fixing state of the mounting ring 110 outside the guide ring 109 is released. After that, the mounting ring 110 is taken out from the outside of the guide ring 109, so that the filter screen is removed, and the filter screen is disassembled to facilitate the replacement of the new filter screen.

[0041] Second embodiment:

[0042] Based on the first embodiment, please refer to Figure 5 The present invention also provides a sewage treatment method using a sewage treatment flotation tank, comprising the following steps:

[0043] S101, the sewage is transferred from the water inlet pipe 105 to the flotation tank 101, and at the same time, the bubbles generated by the bubble generator are transferred to the flotation tank 101 through the connecting pipe 102 to merge with the suspended matter in the sewage.

[0044] Specifically, the mounting ring 110 is sleeved outside the guide ring 109, and then the mounting ring 110 is installed outside the guide ring 109 by the mounting bolts 111, so that the filter can be installed outside the guide ring 109, and the filter is installed. After that, the sewage storage tank is connected with the water inlet pipe 105, so that the sewage stored in the sewage storage tank can be transmitted from the water inlet pipe 105 to the flotation tank 101. At the same time, the flotation tank 101, the connecting pipe 102 and the external bubble generator are connected in sequence, and the bubble generator is started, so that the bubbles generated by the bubble generator are transmitted to the flotation tank 101 through the connecting pipe 102, and merged with the suspended matter in the sewage in the flotation tank 101.

[0045] S102. During the fusion process, the drive motor 107 is started, and the drive motor 107 drives the screw 108 to rotate along its own axis, driving the dredging plate 104 to rotate along its own axis, thereby driving the sewage to form a vortex, accelerating the fusion speed of the bubbles and the suspended matter in the sewage.

[0046] Specifically, during the fusion process, the drive motor 107 is started so that the power output by the output shaft of the drive motor 107 drives the screw 108 to rotate along its own axis, thereby driving the dredging plate 104 to rotate along its own axis in the flotation tank 101 through the rod portion 115 of the screw 108, thereby driving the sewage in the flotation tank 101 to form a vortex, thereby accelerating the fusion speed of the bubbles in the flotation tank 101 and the suspended matter in the sewage.

[0047] S103. At the same time, since the screw 108 rotates along its own axis, the guide ring 109 is driven to move along the trajectory of the thread outside the screw 108, thereby driving the mounting ring 110 to move up and down in the flotation tank 101, and further driving the filter to move up and down in the flotation tank 101.

[0048] Specifically, at the same time, since the screw 108 rotates along its own axis, it drives the guide ring 109 to move along the trajectory of the thread outside the screw 108, so that the guide ring 109 can move up and down in the flotation tank 101, and then drive the installation ring 110 to move up and down in the flotation tank 101. Through the up and down movement of the installation ring 110 in the flotation tank 101, the filter can be driven to move up and down in the flotation tank 101.

[0049] S104, when the filter screen moves up and down, the hydraulic rod 112 is started, and the filter screen is driven to rotate outside the mounting ring 110 by the hydraulic rod 112, so as to open or contract the filter screen, thereby ejecting and cleaning the suspended matter in the sewage.

[0050] Specifically, during the up and down movement of the filter screen, the hydraulic rod 112 is started so that the power output from the output end of the hydraulic rod 112 drives the filter screen to rotate outside the mounting ring 110, thereby opening or contracting the filter screen. Through the opening or contraction of the filter screen and the up and down movement of the filter screen in the flotation tank 101, the suspended matter in the sewage in the flotation tank 101 can be ejected and cleaned.

[0051] S105, after the suspended solids are pushed out and cleaned, the treated sewage is discharged from the outlet pipe to the outside of the flotation tank 101, completing the entire sewage treatment process.

[0052] Specifically, after the suspended matter in the sewage in the flotation tank 101 is pushed out and cleaned, the treated sewage is discharged from the outlet pipe to the outside of the flotation tank 101, thereby completing the entire pretreatment process of the sewage. When the dredging plate 104 cannot completely dredge the blocked filter holes 120 of the filter screen, the filter screen is moved upward, and the mounting bolts 111 are gradually screwed out of the threaded holes of the mounting ring 110 and the guide ring 109, so that the fixing state of the mounting ring 110 outside the guide ring 109 is released. After that, the mounting ring 110 is taken out from the outside of the guide ring 109, so that the filter screen is removed, and the filter screen is disassembled to facilitate the replacement of the new filter screen.

[0053] What is disclosed above is only one or more preferred embodiments of the present application, and cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of implementing the above embodiments and equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A sewage treatment flotation tank, comprising a flotation tank, characterized in that: It also includes a transmission mechanism, a connecting pipe, a support column, a driving mechanism, an opening mechanism, a filter and a dredging plate. The transmission mechanism is located outside the flotation tank and is used to discharge sewage into the flotation tank, or discharge sewage in the flotation tank. The connecting pipe is connected to the flotation tank and is located outside the flotation tank, and the connecting pipe is connected to an external bubble generator. The support column is arranged below the flotation tank. The driving mechanism is used to drive the opening mechanism to move up and down in the flotation tank. The opening mechanism is used to open or close the filter. The filter and the dredging plate are both located in the flotation tank, and the filter is located above the dredging plate.

2. The sewage treatment flotation tank according to claim 1, characterized in that: The transmission mechanism includes an inlet pipe and a drain pipe, both of which are connected to the flotation tank. The inlet pipe is located above the connecting pipe outside the flotation tank, and the drain pipe is located outside the flotation tank on a side away from the inlet pipe.

3. The sewage treatment flotation tank according to claim 1, characterized in that: The driving mechanism includes a driving motor, a screw and a guide ring. The driving motor is arranged at the center position below the flotation tank. The screw is connected to the output shaft of the driving motor and passes through the flotation tank. The guide ring is movably connected to the screw and is located outside the screw.

4. The sewage treatment flotation tank according to claim 3, characterized in that: The opening mechanism includes a mounting ring and a mounting bolt. The mounting ring is detachably connected to the guide ring and is sleeved outside the guide ring. The mounting bolt is detachably connected to the mounting ring, abuts against the guide ring, and penetrates the mounting ring.

5. The sewage treatment flotation tank according to claim 4, characterized in that: The filter screen comprises support rods and filter plates, wherein the support rods are evenly and movably arranged outside the mounting ring, and the filter plate is arranged between two adjacent support rods and movably arranged outside the mounting ring.

6. The sewage treatment flotation tank according to claim 5, characterized in that: The opening mechanism further comprises a hydraulic rod, an output end of which is connected to the support rod, and the hydraulic rod is arranged outside the mounting ring.

7. A sewage treatment method using a sewage treatment flotation tank, applied to the sewage treatment flotation tank according to any one of claims 1 to 6, characterized in that: The following steps are involved: The sewage is transferred from the water inlet pipe to the flotation tank. At the same time, the bubbles generated by the bubble generator are transferred to the flotation tank through the connecting pipe and merged with the suspended matter in the sewage. During the fusion process, the drive motor is started, and the drive motor drives the screw to rotate along its own axis, driving the dredging plate to rotate along its own axis, thereby driving the sewage to form a vortex, accelerating the fusion speed of the bubbles and the suspended matter in the sewage; At the same time, as the screw rotates along its own axis, the guide ring is driven to move along the trajectory of the thread outside the screw, thereby driving the mounting ring to move up and down in the air flotation tank, and further driving the filter to move up and down in the air flotation tank; When the filter screen moves up and down, the hydraulic rod is started to drive the filter screen to rotate outside the mounting ring, so as to open or contract the filter screen, thereby ejecting and cleaning the suspended matter in the sewage; After the suspended matter is pushed out and cleaned, the treated sewage is discharged from the outlet pipe to the outside of the flotation tank, completing the entire sewage treatment process.

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