Efficient pretreatment deslagging grit chamber

Abstract

The utility model discloses an efficient pretreatment deslagging grit chamber, belongs to the field of sewage treatment, and solves the problems of large occupied area, large head loss and high energy consumption due to separate arrangement of a fine grid tank, a grit chamber and a superfine grid tank. The device comprises a fine grid tank, an aerated grit chamber, a superfine grid tank and a water outlet tank which are connected in sequence, a water inlet tank and at least two fine grid channels are arranged in the fine grid tank; the aerated grit chamber is internally provided with at least two grit grooves, the grit grooves are connected with the fine grid channel, a slag removal channel is arranged beside the grit grooves, and the slag removal channel is communicated with the grit grooves through the bottom of the chamber wall; at least two superfine grid channels are arranged in the superfine grid pool, and the superfine grid channels are connected with the sand settling tank; and the water outlet tank is connected with the superfine grid channel. According to the utility model, the fine grid tank, the aerated grit chamber, the superfine grid tank and the water outlet tank are integrally arranged after being combined, so that the occupied area is small, and the inspection management is convenient; and connecting pipelines are reduced, head loss is reduced, and energy consumption is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of wastewater treatment, specifically relating to a high-efficiency pretreatment sludge removal and grit settling tank. Background Technology

[0002] With increasing restrictions on urban land use, more and more wastewater treatment plants are adopting smaller-footprint wastewater treatment processes such as MBR (Multi-Body Bioreactor). However, the MBR process has high requirements for the incoming water. Most treatment processes pre-treat the raw water in an ultra-fine screen tank after passing through a fine screen tank and a grit chamber. Because the fine screen tank, grit chamber, and ultra-fine screen tank are arranged separately, the footprint is large, the head loss is large, and the energy consumption is high. In addition, because the three pretreatment tanks are arranged separately, inspection personnel need to go up and down the three structures, which is inconvenient and inefficient. Utility Model Content

[0003] The purpose of this invention is to provide a highly efficient pretreatment slag removal and sedimentation tank to solve the problems of separate arrangement of fine screen tanks, sedimentation tanks, and ultrafine screen tanks, which result in large floor space, large head loss, and high energy consumption.

[0004] The technical solution of this utility model is: a high-efficiency pretreatment slag removal and grit removal tank, comprising a fine screen tank, an aerated grit removal tank, an ultrafine screen tank and an effluent tank connected in sequence.

[0005] The fine screen tank is equipped with an inlet pool and at least two fine screen channels. The inlet pool is connected to an inlet pipe at the front end, and the fine screen channels are connected to the rear end of the inlet pool.

[0006] The aerated grit chamber is equipped with at least two grit chambers, which are connected to the fine screen channel in a one-to-one correspondence. A slag removal channel is provided next to the grit chamber, and the slag removal channel and the grit chamber are connected through the bottom of the tank wall.

[0007] The ultrafine bar tank is equipped with at least two ultrafine bar channels, which are connected to the sedimentation tank one by one.

[0008] There are at least two outlet pools, each connected to an ultra-fine screen channel, and an outlet pipe is connected to the rear end of the outlet pool.

[0009] As a further improvement of this utility model, a fine screen cleaning machine is provided inside the fine screen channel. The fine screen cleaning machine adopts a rotary drum screen cleaning machine, and a screw conveyor is provided below the fine screen cleaning machine.

[0010] As a further improvement of this utility model, it also includes a sand suction device, which is connected to a sand suction pipe, the lower end of which is located in the sedimentation tank.

[0011] As a further improvement of this utility model, the sand suction device is connected to a sand discharge channel, and a sand-water separator is connected to the bottom of the sand discharge channel.

[0012] As a further improvement of this utility model, it also includes a blower, the output end of which is connected to an aeration pipe, and the aeration pipe is provided with multiple aeration branch pipes, which are distributed in the sedimentation tank.

[0013] As a further improvement of this utility model, a slag scraper is provided at the top of the slag removal channel.

[0014] As a further improvement of this utility model, the top of the sedimentation tank and the slag removal channel is provided with a rubber sheet and an odor pipe.

[0015] As a further improvement of this utility model, an ultra-fine bar screen cleaner is provided inside the ultra-fine bar screen channel. The ultra-fine bar screen cleaner is a perforated plate type bar screen cleaner. A slag-water separator is provided below the ultra-fine bar screen cleaner. The ultra-fine bar screen cleaner is connected to the slag-water separator through a slag chute.

[0016] As a further improvement of this utility model, an regulating weir is provided in the water outlet pool, and the ultra-fine screen channel and the water outlet pipe are located on both sides of the regulating weir.

[0017] As a further improvement of this utility model, the top of the fine screen tank, the aerated grit chamber, the ultrafine screen tank, and the effluent tank are all equipped with walkway slabs.

[0018] The beneficial effects of this utility model are as follows: This utility model integrates the fine screen tank, aerated grit chamber, ultrafine screen tank, and effluent tank into a single integrated layout, resulting in a small footprint and convenient inspection and management; it also reduces connecting pipelines, head loss, and energy consumption. The aerated grit chamber of this utility model is equipped with a sludge removal channel. Under the action of hydraulic vortex, scum and grease in the grit chamber flow from the bottom into the sludge removal channel, thereby improving the effluent quality and ensuring the normal operation of subsequent wastewater treatment processes. Attached Figure Description

[0019] Figure 1 This is a top view of the present invention;

[0020] Figure 2 for Figure 1 AA section view in the middle;

[0021] Figure 3 for Figure 1 BB cross-section view in the middle;

[0022] Figure 4 for Figure 1 CC cross-section view.

[0023] In the diagram: 1. Fine screen tank; 1-1. Fine screen channel; 1-2. Fine screen cleaning machine; 1-3. Screw conveyor; 1-4. Inlet tank; 1-5. First gate; 2. Aerated grit chamber; 2-1. Second gate; 2-2. Grit settling trough; 2-3. Sand suction equipment; 2-4. Sand suction pipe; 2-5. Slag removal channel; 2-6. Sand discharge channel; 2-7. Sand-water separator; 2-8. Rubber sheet; 2 -9. Odor duct; 2-10. Sludge scraper; 3. Ultra-fine bar screen tank; 3-1. Ultra-fine bar screen channel; 3-2. Ultra-fine bar screen cleaner; 3-3. Sludge-water separator; 3-4. Third gate; 3-5. Sludge chute; 4. Effluent tank; 4-1. Regulating weir; 4-2. Fourth gate; 5. Blower; 6. Aeration pipe; 7. Aeration branch pipe; 8. Walkway; 9. Inlet pipe; 10. Outlet pipe. Detailed Implementation

[0024] The present invention will now be described in detail with reference to the accompanying drawings.

[0025] Example 1

[0026] like Figure 1-4 As shown, a high-efficiency pretreatment slag removal and grit removal tank includes a fine screen tank 1, an aerated grit removal tank 2, an ultrafine screen tank 3, and an effluent tank 4 connected in sequence.

[0027] The fine screen pool 1 is provided with an inlet pool 1-4 and at least two fine screen channels 1-1. The front end of the inlet pool 1-4 is connected to an inlet pipe 9, and the fine screen channels 1-1 are connected to the rear end of the inlet pool 1-4. A first gate 1-5 is provided between the inlet pool 1-4 and the fine screen channels 1-1.

[0028] The aerated grit chamber 2 is equipped with at least two grit chambers 2-2, which are connected to the fine screen channel 1-1 in a one-to-one correspondence. A second gate 2-1 is provided between the fine screen channel 1-1 and the grit chamber 2-2. A slag removal channel 2-5 is provided on the side of the grit chamber 2-2, and the slag removal channel 2-5 and the grit chamber 2-2 are connected through the bottom of the tank wall.

[0029] The ultrafine bar tank 3 is provided with at least two ultrafine bar channels 3-1, which are connected to the sedimentation tank 2-2 in a one-to-one correspondence. A third gate 3-4 is provided between the sedimentation tank 2-2 and the ultrafine bar channel 3-1.

[0030] At least two water outlet pools 4 are provided, and each water outlet pool 4 is connected to the ultra-fine bar channel 3-1 in a corresponding manner. A fourth gate 4-2 is provided between the ultra-fine bar channel 3-1 and the water outlet pool 4. A water outlet pipe 10 is connected to the rear end of the water outlet pool 4.

[0031] Fine screen channel 1-1 is equipped with fine screen cleaning machine 1-2, which is a rotary drum screen cleaning machine. A screw conveyor 1-3 is installed below the fine screen cleaning machine 1-2.

[0032] It also includes a sand suction device 2-3, which is connected to a sand suction pipe 2-4, with the lower end of the sand suction pipe 2-4 located inside the settling tank 2-2.

[0033] The sand suction device 2-3 is connected to the sand discharge channel 2-6, and the bottom of the sand discharge channel 2-6 is connected to the sand-water separator 2-7. The sand discharge channel 2-6 is located on one side of the aerated grit chamber 2.

[0034] It also includes a blower 5, the output end of which is connected to an aeration pipe 6. The aeration pipe 6 is equipped with multiple aeration branch pipes 7, which are distributed within the sedimentation tank 2-2. The blower 5 is a Roots blower.

[0035] The top of the slag removal channel 2-5 is equipped with a slag scraper 2-10.

[0036] The top of the sedimentation tank 2-2 and the slag removal channel 2-5 is equipped with a rubber sheet 2-8 and an odor pipe 2-9. The rubber sheet 2-8 prevents the spread of odor, and the odor pipe 2-9 collects the odor.

[0037] The ultra-fine bar channel 3-1 is equipped with an ultra-fine bar screen cleaner 3-2, which is a perforated plate bar screen cleaner. Below the ultra-fine bar screen cleaner 3-2 is a slag-water separator 3-3. The ultra-fine bar screen cleaner 3-2 is connected to the slag-water separator 3-3 through a slag chute 3-5.

[0038] The outlet pool 4 is equipped with a regulating weir 4-1, and the ultra-fine screen channel 3-1 and the outlet pipe 10 are located on both sides of the regulating weir 4-1.

[0039] The top of the fine screen tank 1, the aerated grit chamber 2, the ultrafine screen tank 3, and the effluent tank 4 are all equipped with walkway 8.

[0040] In this embodiment, two fine screen channel 1-1, two sedimentation tank 2-2, two ultra-fine screen channel 3-1, and two effluent pools 4 are provided; the slag removal channel 2-5 is located outside the sedimentation tank 2-2.

[0041] Raw water enters the inlet pool 1-4 through inlet pipe 9, and then is distributed to each fine screen channel 1-1. The fine screen cleaning machine 1-2 removes suspended solids from the water. The treated water enters the grit chamber 2-2, and the screenings are compressed by screw conveyor 1-3 and transported off-site for treatment. In the grit chamber 2-2, blower 5 provides uniform aeration through aeration pipe 6 and aeration branch pipe 7, which abrades and washes the sand and gravel in the wastewater. The washed sand and gravel are then sucked through suction pipe 2-4 and suction equipment 2-3 and transported to sand discharge channel 2-6, and then enter sand separator 2-7 for treatment. The scum and grease in the grit chamber 2-2 flow from the bottom to the slag removal channel 2-5 under the action of hydraulic vortex, and the scum and grease are removed by scraper 2-10. Water treated in sedimentation tank 2-2 enters ultra-fine screen channel 3-1, where ultra-fine screen cleaner 3-2 removes impurities such as hair from the wastewater. The water then flows into effluent tank 4, where it is evenly distributed by regulating weir 4-1 before exiting through effluent pipe 10. Impurities intercepted by ultra-fine screen cleaner 3-2 are discharged through slag chute 3-5 into slag-water separator 3-3.

[0042] This invention removes suspended solids, grit, and hair from wastewater, improving effluent quality and ensuring the normal operation of subsequent wastewater treatment processes. The overall layout of this invention connects the fine screen tank 1, aerated grit chamber 2, ultrafine screen tank 3, and effluent tank 4 via walkway 8, resulting in a compact structure, reduced connecting pipes, saving space and energy, reducing inspection workload, and improving inspection efficiency.

Claims

1. A high-efficiency pretreatment slag removal and grit removal tank, characterized in that: It includes a fine screen tank (1), an aerated grit chamber (2), an ultrafine screen tank (3), and an effluent tank (4) connected in sequence. The fine screen pool (1) is provided with an inlet pool (1-4) and at least two fine screen channels (1-1). The inlet pool (1-4) is connected to an inlet pipe (9) at the front end, and the fine screen channels (1-1) are connected to the rear end of the inlet pool (1-4). The aerated grit chamber (2) is equipped with at least two grit chambers (2-2), which are connected to the fine screen channel (1-1) in a one-to-one correspondence. A slag removal channel (2-5) is provided on the side of the grit chamber (2-2), and the slag removal channel (2-5) and the grit chamber (2-2) are connected through the bottom of the pool wall. The ultrafine bar tank (3) is provided with at least two ultrafine bar channels (3-1), and the ultrafine bar channels (3-1) are connected to the sedimentation tank (2-2) one by one; At least two water outlet pools (4) are provided, and each water outlet pool (4) is connected to an ultra-fine screen channel (3-1) in a one-to-one correspondence. The rear end of the water outlet pool (4) is connected to a water outlet pipe (10).

2. The high-efficiency pretreatment slag removal and grit removal tank according to claim 1, characterized in that: The fine screen channel (1-1) is equipped with a fine screen cleaning machine (1-2), which is a rotary drum screen cleaning machine. A screw conveyor (1-3) is installed below the fine screen cleaning machine (1-2).

3. The high-efficiency pretreatment slag removal and grit removal tank according to claim 1, characterized in that: It also includes a sand suction device (2-3), which is connected to a sand suction pipe (2-4), the lower end of which is located in the sedimentation tank (2-2).

4. The high-efficiency pretreatment slag removal and grit removal tank according to claim 3, characterized in that: The sand suction device (2-3) is connected to a sand discharge channel (2-6), and a sand-water separator (2-7) is connected to the bottom of the sand discharge channel (2-6).

5. The high-efficiency pretreatment slag removal and grit removal tank according to claim 4, characterized in that: It also includes a blower (5), the output end of which is connected to an aeration pipe (6), and the aeration pipe (6) is provided with multiple aeration branch pipes (7), which are distributed in the sedimentation tank (2-2).

6. The high-efficiency pretreatment slag removal and grit removal tank according to claim 5, characterized in that: The top of the slag removal channel (2-5) is equipped with a slag scraper (2-10).

7. The high-efficiency pretreatment slag removal and grit removal tank according to claim 6, characterized in that: The top of the sedimentation tank (2-2) and the slag removal channel (2-5) is equipped with a rubber sheet (2-8) and an odor pipe (2-9).

8. The high-efficiency pretreatment slag removal and grit removal tank according to claim 1, characterized in that: The ultra-fine bar channel (3-1) is equipped with an ultra-fine bar screen cleaner (3-2). The ultra-fine bar screen cleaner (3-2) is a perforated plate bar screen cleaner. A slag-water separator (3-3) is installed below the ultra-fine bar screen cleaner (3-2). The ultra-fine bar screen cleaner (3-2) is connected to the slag-water separator (3-3) through a slag chute (3-5).

9. A high-efficiency pretreatment slag removal and grit removal tank according to claim 1, characterized in that: The water outlet pool (4) is equipped with an regulating weir (4-1), and the ultra-fine grid channel (3-1) and the water outlet pipe (10) are located on both sides of the regulating weir (4-1).

10. A high-efficiency pretreatment slag removal and grit removal sedimentation tank according to any one of claims 1-9, characterized in that: The top of the fine screen tank (1), aerated grit chamber (2), ultrafine screen tank (3) and effluent tank (4) are all equipped with walkway slabs (8).

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