A precision drum filter

Abstract

The utility model discloses a drum type precision filter, including the box, the box inside one side is fixed with the baffle, and the baffle middle part is passed through and is rotatedly connected with the drum filter screen through the bearing, the drum filter screen is close to the baffle one side and is the open design, the drum filter screen is fixed with the inlet pipe away from the open one end, and inlet pipe passes through the box side wall and extends to the box outside, the box bottom is fixed with a plurality of drain pipes, in the utility model, set up and blow gas subassembly, combine pneumatic cleaning with hydraulic flushing, this blow gas subassembly mainly comprises air pump, air knife and gas supply pipeline, in the cleaning process, air pump pumps into the air knife chamber continuously with compressed air, and air is discharged through the linear slit outlet specially made at the bottom of air knife, forms a concentrated, uniform high pressure air curtain, and this high pressure air curtain is accurately guided, and is blown to the outer surface of the drum filter screen rotating to the cleaning station vertically or at a certain angle.

Description

Technical Field

[0001] This utility model relates to the field of filter technology, and in particular to a rotary drum precision filter. Background Technology

[0002] Rotary drum precision filters, as a type of continuously operating solid-liquid separation equipment, are widely used in municipal sewage treatment, industrial wastewater pretreatment, aquaculture recirculating water treatment, and process water filtration in industries such as food and papermaking. Its core working component is a horizontally or slightly tilted, continuously and slowly rotating drum, the surface of which is covered with a high-precision filter screen.

[0003] Currently, standard online cleaning technology for rotary drum precision filters primarily relies on high-pressure water flushing. A typical structure consists of one or more flushing water pipes with fan-shaped nozzles installed parallel to the drum axis on the upper outer side of the drum. When the contaminated filter area rotates to the flushing station, a high-pressure water jet, driven by a high-pressure pump, is ejected from the nozzles, impacting the filter surface and thus stripping away and washing away most of the impurities. Some advanced designs further incorporate mechanical contact components such as nylon brushes or scrapers to physically scrape and assist in cleaning more adhesive contaminants.

[0004] However, existing rotary drum precision filters still have the following drawbacks: First, their cleaning effect on lightweight, dry, or sticky impurities is limited. High-pressure water jets are effective for wet, heavy, and easily dispersed particles, but for sludge, lightweight fibrous flocs, or sticky organic matter (such as oily contaminants) that have hardened on the screen after dewatering, the water flow often only washes away the loose surface parts, failing to completely break down the adhesion between the impurities and the filter screen. This leads to impurity residue and gradual accumulation, eventually forming stubborn blockages. Therefore, further improvements are needed. To this end, we propose a rotary drum precision filter. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a rotary drum precision filter.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a rotary drum precision filter, comprising a housing, a partition fixed on one side inside the housing, and a rotary drum filter screen rotatably connected to the middle of the partition via a bearing, the rotary drum filter screen having an open design on the side near the partition, an inlet pipe fixed on the end of the rotary drum filter screen away from the open end, the inlet pipe extending through the side wall of the housing to the outside of the housing, multiple drain pipes fixed at the bottom of the housing, a motor for driving the rotary drum filter screen to rotate fixedly installed on the outer side wall of the housing near the partition, a waste collection trough horizontally arranged at the top of the inside of the rotary drum filter screen, and a rinsing assembly, an air blowing assembly, and an impact assembly fixedly installed on the top of the housing above the rotary drum filter screen.

[0007] Furthermore, an external gear ring is fixed to the surface of the drum filter screen near the motor end, and the motor output shaft passes through the side wall of the housing and is fixed with a drive gear, which meshes with the external gear ring.

[0008] Furthermore, the flushing assembly includes a horizontal pipe fixed to the top of the tank, with multiple high-pressure nozzles fixed at equal intervals on the lower surface of the horizontal pipe, and the horizontal pipe is connected to a water pump.

[0009] Furthermore, a waste discharge pipe is fixed at one end of the waste collection tank near the opening of the rotating drum filter screen, and the waste discharge pipe extends through the side wall of the box to the outside of the box.

[0010] Furthermore, the air blowing assembly includes an air knife, which is hollow inside and has a linear air outlet at the bottom. An air inlet pipe is fixed to one end of the air knife, and an air pump is connected to the other end of the air inlet pipe.

[0011] Furthermore, the impact assembly includes a ramp fixed to the top of the box, and an electromagnetic pulse vibrator is fixed to the lower surface of the ramp. A horizontal plate is fixed to the bottom drive end of the electromagnetic pulse vibrator. Multiple vertical rods are fixed at equal intervals on the lower surface of the horizontal plate, and an impact head is slidably connected to the bottom surface of each vertical rod. A spring is fixedly connected to the inner bottom wall of the impact head and the bottom end of the vertical rod.

[0012] The beneficial effects of this utility model are:

[0013] 1. This utility model combines pneumatic cleaning with water rinsing by setting up an air blowing component. The air blowing component mainly consists of an air pump, an air knife, and an air supply pipeline. During the cleaning process, the air pump continuously pumps compressed air into the air knife chamber. The air is discharged through a specially designed linear slit outlet at the bottom of the air knife, forming a concentrated and uniform high-pressure air curtain. This high-pressure air curtain is precisely guided and blown vertically or at a certain angle onto the outer surface of the rotating drum filter screen that has rotated to the cleaning station. This effectively blows away, loosens, and peels off light, dry, or sticky impurities adhering to the filter screen surface. These impurities peeled off by the airflow are then completely removed by gravity and subsequent or simultaneous high-pressure water rinsing. This solution forms a gas-liquid synergistic composite cleaning mechanism with the traditional pure water washing solution. It not only significantly improves the overall cleaning efficiency for complex pollutants, but also, due to its targeted cleaning of the top area of ​​the filter screen, more comprehensively restores the filter screen throughput and extends the continuous and stable operation cycle of the filter.

[0014] 2. This invention incorporates an electromagnetic pulse vibration impact component, using high-frequency pulses to drive the impact head to strike the rotating drum filter screen, generating a powerful stress wave. This vibration effectively breaks down the bond between sticky impurities and the filter screen, causing them to loosen. It is particularly effective at removing stubborn dirt from the inner top wall of the filter screen, which is difficult for conventional water flow to reach, without attenuation. This component, in conjunction with the flushing and air blowing system, forms a three-in-one cleaning system of vibration loosening, airflow purging, and water rinsing, significantly improving cleaning efficiency, reducing the risk of clogging and flushing energy consumption, and extending filter screen life. Attached Figure Description

[0015] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is an overall sectional view of the present invention;

[0017] Figure 2 This is a perspective view of the flushing assembly of this utility model;

[0018] Figure 3 This is a perspective view of the air blowing component of this utility model;

[0019] Figure 4 This is a side sectional view of the air knife of this utility model;

[0020] Figure 5 This is a schematic diagram of the impact component of this utility model;

[0021] Figure 6 For the present utility model Figure 5 Enlarged view of point A in the middle.

[0022] The attached figures are labeled as follows:

[0023] 1. Housing; 2. Partition; 3. Rotary drum filter; 31. External gear ring; 4. Water inlet pipe; 5. Drain pipe; 6. Motor; 61. Drive gear; 7. Flushing assembly; 71. Horizontal pipe; 72. High-pressure nozzle; 8. Air blowing assembly; 81. Air knife; 82. Air inlet pipe; 9. Impact assembly; 91. Skip board; 92. Electromagnetic pulse vibrator; 93. Horizontal plate; 94. Vertical rod; 95. Impact head; 96. Spring; 10. Waste collection trough; 11. Waste discharge pipe. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0025] like Figures 1-6 As shown, a rotary drum precision filter is disclosed, comprising a housing 1, a partition 2 fixed to one side inside the housing 1, and a rotary drum filter 3 rotatably connected to the middle of the partition 2 via a bearing. The rotary drum filter 3 has an open design on the side near the partition 2, and an inlet pipe 4 is fixed to the end of the rotary drum filter 3 away from the open end. The inlet pipe 4 extends through the side wall of the housing 1 to the outside of the housing 1. Multiple drain pipes 5 are fixed to the bottom of the housing 1. A motor 6 for driving the rotary drum filter 3 to rotate is fixedly installed on the outer side wall of the housing 1 near the partition 2. A waste collection trough 10 is horizontally arranged at the top of the rotary drum filter 3. A flushing assembly 7, an air blowing assembly 8, and an impact assembly 9 are fixedly installed on the top of the housing 1 above the rotary drum filter 3.

[0026] In this embodiment, a control cabinet is also provided outside the housing 1. The control cabinet has a built-in control circuit and controller, which controls the operation of the electronic components of the filter.

[0027] An external gear ring 31 is fixed on the surface of the drum filter screen 3 near the end of the motor 6. The output shaft of the motor 6 passes through the side wall of the housing 1 and is fixed with a drive gear 61. The drive gear 61 meshes with the external gear ring 31.

[0028] After starting the motor 6, the drive gear 61 at the output end of the motor 6 drives the external gear ring 31 to rotate, thereby realizing the rotation of the drum filter screen 3. When the sewage enters the inside of the drum filter screen 3 from the inlet pipe 4, the water passing through the drum filter screen 3 enters the bottom of the box 1 and is finally discharged from the drain pipe 5. The impurities are attached to the inner wall of the drum filter screen 3. The working principle here is exactly the same as that of the existing technology.

[0029] The flushing assembly 7 includes a horizontal pipe 71 fixed to the top of the housing 1. Multiple high-pressure nozzles 72 are fixed at equal intervals on the lower surface of the horizontal pipe 71, and the horizontal pipe 71 is connected to a water pump.

[0030] Waste collection tank 10 is fixed with a waste discharge pipe 11 at one end near the open end of the rotating drum filter screen 3. The waste discharge pipe 11 extends through the side wall of the box body 1 to the outside of the box body 1.

[0031] As the drum filter 3 rotates, the impurities attached to the inner wall of the drum filter 3 rotate to the top. At this time, after the water pump is started, the water flows into the horizontal pipe 71 and finally sprays out from the high-pressure nozzle 72, washing away the impurities attached to the inside of the drum filter 3. The washed-off impurities flow into the waste collection tank 10 with the water flow and are finally discharged from the waste discharge pipe 11. The working principle here is the same as that of the existing technology.

[0032] The air blowing assembly 8 includes an air knife 81, which is hollow inside and has a linear air outlet at the bottom. An air inlet pipe 82 is fixed to one end of the air knife 81, and an air pump is connected to the other end of the air inlet pipe 82.

[0033] While rinsing the top of the drum filter screen 3 through the rinsing component 7, the air pump is started. The air pump pumps high-pressure air into the air knife 81, and the airflow blows out from the bottom of the air knife 81, using high-pressure air to blow away the impurities attached to the inner wall of the drum filter screen 3.

[0034] The impact assembly 9 includes a ramp 91 fixed to the top of the housing 1, and an electromagnetic pulse vibrator 92 is fixed to the lower surface of the ramp 91. A horizontal plate 93 is fixed to the bottom drive end of the electromagnetic pulse vibrator 92. Multiple vertical rods 94 are fixed at equal intervals on the lower surface of the horizontal plate 93. An impact head 95 is slidably connected to the bottom surface of each vertical rod 94. A spring 96 is fixedly connected to the inner bottom wall of the impact head 95 and the bottom end of the vertical rod 94.

[0035] With the rinsing assembly 7 in operation, the electromagnetic pulse vibrator 92 is activated to drive the horizontal plate 93 to vibrate at high frequency. The horizontal plate 93 then drives the vertical rod 94 and the impact head 95 to vibrate at high frequency. Thus, the impact head 95 impacts the top of the drum filter screen 3, causing the drum filter screen 3 to vibrate and dislodging the impurities attached to the inner top wall of the drum filter screen 3. The spring 96 achieves soft contact between the impact head 95 and the drum filter screen 3.

[0036] When the filter is in operation, the flushing assembly 7 must be running, while the blowing assembly 8 and the impact assembly 9 can operate alternately or simultaneously.

[0037] Working principle: First, the motor 6 is started. The drive gear 61 at the output end of the motor 6 drives the external gear ring 31 on the drum filter 3 to rotate, causing the drum filter 3 to rotate slowly inside the housing 1. Wastewater enters the interior of the drum filter 3 through the inlet pipe 4, the filtrate passes through the drum filter 3 and enters the bottom of the housing 1, and is finally discharged through the drain pipe 5, while impurities are trapped on the inner wall of the drum filter 3. When the area with attached impurities rotates with the drum filter 3 to the top cleaning station, the water pump supplies water to the horizontal pipe 71, and the water flow is sprayed from multiple high-pressure nozzles 72 to perform basic rinsing of the inner wall of the drum filter 3.

[0038] To improve cleaning effectiveness, the air blowing component 8 and the impact component 9 can be activated simultaneously or alternately.

[0039] When the air blowing assembly 8 is started, the external air pump pumps high-pressure air into the air knife 81 through the air inlet pipe 82. The air is blown out from the linear air outlet at the bottom of the air knife 81, forming a high-pressure air curtain, which further blows away and peels off light or sticky impurities on the surface of the filter screen.

[0040] When the impact assembly 9 is activated, the electromagnetic pulse vibrator 92 works, driving the horizontal plate 93 to vibrate at high frequency. The vibration is then transmitted to the impact head 95 at the bottom through the vertical rod 94. The impact head 95, buffered by the spring 96, performs high-frequency, soft knocking on the top of the drum filter screen 3, generating strong vibration to loosen the impurities stubbornly adhering to the inner top wall.

[0041] All impurities washed, blown off, or shaken off are carried by the flushing water flow into the waste collection tank 10 inside the rotary drum filter screen 3, and finally discharged through the waste discharge pipe 11. The entire cleaning process is uniformly coordinated by the control cabinet outside the housing 1, forming a three-in-one collaborative cleaning system of "hydraulic flushing, pneumatic blowing, and vibration loosening", which significantly improves the cleaning efficiency and thoroughness of complex dirt.

[0042] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A rotary drum precision filter, comprising a housing (1), characterized in that: A partition (2) is fixed inside one side of the box (1), and a rotating drum filter (3) is rotatably connected through the middle of the partition (2) via a bearing. The rotating drum filter (3) is open on the side near the partition (2). A water inlet pipe (4) is fixed on the end of the rotating drum filter (3) away from the open. The water inlet pipe (4) extends through the side wall of the box (1) to the outside of the box (1). Multiple drain pipes (5) are fixed at the bottom of the box (1). A motor (6) for driving the rotating drum filter (3) to rotate is fixedly installed on the outer side wall of the box (1) near the partition (2). A waste collection trough (10) is horizontally arranged at the top of the rotating drum filter (3). A flushing assembly (7), an air blowing assembly (8), and an impact assembly (9) are fixedly installed on the top of the box (1) above the rotating drum filter (3).

2. The rotary drum precision filter according to claim 1, characterized in that: The surface of the rotating drum filter (3) near the motor (6) is fixed with an external gear ring (31). The output shaft of the motor (6) passes through the side wall of the housing (1) and is fixed with a drive gear (61). The drive gear (61) meshes with the external gear ring (31).

3. A rotary drum precision filter according to claim 1, characterized in that: The flushing assembly (7) includes a horizontal tube (71) fixed to the top of the housing (1), and multiple high-pressure nozzles (72) are fixed at equal intervals on the lower surface of the horizontal tube (71), and the horizontal tube (71) is connected to a water pump.

4. A rotary drum precision filter according to claim 1, characterized in that: The waste collection tank (10) is fixed with a waste discharge pipe (11) at one end near the open end of the rotating drum filter (3). The waste discharge pipe (11) extends through the side wall of the box (1) to the outside of the box (1).

5. A rotary drum precision filter according to claim 1, characterized in that: The air blowing assembly (8) includes an air knife (81), which is hollow inside and has a linear air outlet at the bottom. One end of the air knife (81) is fixed with an air inlet pipe (82), and the other end of the air inlet pipe (82) is connected to an air pump.

6. A rotary drum precision filter according to claim 1, characterized in that: The impact assembly (9) includes a ramp (91) fixed to the top of the box (1), and an electromagnetic pulse vibrator (92) is fixed to the lower surface of the ramp (91). A horizontal plate (93) is fixed to the bottom drive end of the electromagnetic pulse vibrator (92). Multiple vertical rods (94) are fixed at equal intervals on the lower surface of the horizontal plate (93). An impact head (95) is slidably connected to the bottom surface of each vertical rod (94). A spring (96) is fixedly connected to the inner bottom wall of the impact head (95) and the bottom end of the vertical rod (94).

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