Mechanical disturbance washing type water treatment filtering device and treatment method thereof

Abstract

The invention relates to the technical field of sewage treatment, in particular to a mechanical disturbance washing type water treatment filtering device and a treatment method thereof. The mechanical disturbance washing type water treatment filtering device comprises a water distribution area, a filter material area, a filter plate filter head, a clear water area, an ultrahigh area, an effluent weir, a stirring washing motor, a stirring washing paddle, a water inlet electric valve, a water distribution opening, a stirring washing drainage electric valve, a stirring washing drainage pipe, a communicating pipe and a water outlet pipe. According to the water treatment filtering device, the EPS foam filter beads are adopted as the filter material, and the filter material is cleaned in a disturbed washing manner, so that the problems of the existing filtering device in rural sewage treatment are solved; the device has the advantages of high water quantity and water quality impact resistance, stable and reliable treatment effect, durability, less corollary equipment, simplicity in operation and maintenance, full-automatic operation, small head loss, no need of a secondary lifting pump and no need of backwashing equipment, low overall investment, low operation cost and saved occupied area and installation space, and the installed power and the operation power consumption of the equipment are reduced by more than 80%.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and in particular to a mechanically disturbed-washing water treatment and filtering device and a treatment method thereof. Background Art

[0002] In recent years, rural sewage treatment has made significant progress. However, due to the wide variety of locational conditions, geography, climate, topography, economic development, permanent population, sewage production, accessibility to centralized sewage collection, and living habits, rural domestic sewage is inevitably characterized by extremely unstable water quantity and quality, poor operating conditions of sewage treatment facilities, and a lack of professional operators and managers. Therefore, when applied to rural sewage treatment, the effectiveness and stability of conventional sewage treatment technologies are significantly compromised, necessitating improvements tailored to the specific characteristics of rural sewage treatment. Regarding sewage filtration technology, current filtration devices used in rural sewage treatment generally suffer from numerous supporting equipment, complex operation and management, numerous fault points, high requirements for operator and management personnel, high filtration head loss, the need for secondary lift pumps and backwash equipment with high installed power, a significant impact on electricity load in remote villages and towns, large equipment investment and footprint, the inability of conventional filter media to withstand variable influent volume and quality, the ease of contamination of the filter media, resulting in poor effluent quality, difficulty in cleaning the filter media using conventional backwashing methods, and the tendency of the filter media to become compacted. Summary of the Invention

[0003] The present invention discloses a mechanical perturbation-washing water treatment and filtration device and a treatment method thereof, aiming to overcome the problems in the background technology. The present invention adopts the following technical solutions:

[0004] A mechanical turbulence-washing water treatment and filtration device comprises a water distribution area, a filter material area, a filter plate and filter head, a clear water area, an ultra-high area, a water outlet weir, a turbulence-washing motor, a turbulence-washing paddle, a water inlet electric valve, a water distribution port, a turbulence-washing drainage electric valve, a turbulence-washing drainage pipe, a connecting pipe and a water outlet pipe.

[0005] The interior of the water treatment and filtration device consists of the super-high area, water outlet weir, clear water area, filter material area, and water distribution area from top to bottom;

[0006] The disturbing and washing motor is fixed on the top of the water treatment and filtering device, and a disturbing and washing paddle is connected below the motor;

[0007] The disturbing and washing paddle is located in the filter material area and is driven by the disturbing and washing motor;

[0008] A layer of white spherical EPS foam filter beads is suspended in the filter material area as filter material;

[0009] The filter plate and filter head are fixedly installed between the clean water area and the filter material area, and the filter head is evenly inverted and installed on the filter plate;

[0010] The water distribution port is connected to the water distribution area, the water distribution port is located in the center of the water distribution area, and the water distribution port is vertically downward;

[0011] The water inlet electric valve is connected to the water distribution port through a pipeline;

[0012] The electric valve for disturbing washing and draining is connected to the disturbing washing and draining pipe;

[0013] The outlet pipe is connected to the outlet weir;

[0014] The connecting pipe is connected to another water treatment and filtering device.

[0015] Specifically, the scrubber paddle includes bars, a frame, and a rotating shaft.

[0016] The disturbing and washing paddle is a frame-type grid structure;

[0017] The frame is welded from stainless steel square tubes and connected to the rotating shaft;

[0018] The grid bars are made of stainless steel flat steel and are evenly welded to the frame;

[0019] The agitating and washing paddle is connected to the agitating and washing motor through a rotating shaft, and the agitating and washing paddle is driven by the agitating and washing motor.

[0020] In a preferred embodiment, the water treatment and filtration device is a circular or square steel tank with a diameter or side length D of 1.0 to 3.0 m, a water distribution area height h1 of 0.8 to 1.0 m, a filter area height h2 of 0.8 to 1.2 m, a clear water area height h3 of 0.6 to 1.0 m, an ultra-high area height h4 of 0.3 to 0.4 m, and a total height of 3.0 to 3.5 m.

[0021] In a preferred embodiment, the particle size of the EPS foam filter beads is 1.0-2.0 mm, and the bulk density is 25-50 kg / m 3 , porosity is 50%, and compressive strength is greater than 100kPa.

[0022] In a preferred solution, the water distribution port is a trumpet-shaped structure, the water distribution port should be centered and vertically downward, and the height e of the water distribution port from the bottom of the water treatment and filtration device is 0.15 to 0.2 m.

[0023] In a preferred solution, the bar width b is 50 mm, the net bar spacing d is 100-150 mm, the total width D of the disturbing washing paddle is 250 mm, the total height h2 is 175 mm, and it is centered in the filter material area, with the bottom elevation consistent with the bottom elevation of the filter material area.

[0024] In a preferred solution, the rotation speed of the disturbing and washing motor is controlled to be 10-15 r / min, so that the linear speed of the disturbing and washing paddle is 60-90 m / min.

[0025] The methods of sewage treatment are as follows:

[0026] S1: During normal filtration, the electric valve for washing and draining is closed, the washing motor and the washing paddle are turned off, and the water inlet electric valve is opened. The sewage to be treated passes through the water distribution port and enters the water distribution area at the bottom of the water treatment filter device. The sewage rises evenly through the filter material area, and then passes through the filter plate filter head to obtain clean water stored in the clean water area, and overflows from the upper part of the clean water area into the outlet weir, and finally flows into the outlet pipe for discharge; the present invention improves the conventional filter material into a white spherical EPS foam filter bead, and gives the parameters of the EPS foam filter bead used as filter material. The EPS foam filter bead is originally an intermediate material for building insulation and packaging boxes. It is easy to obtain and inexpensive. It has natural advantages such as light weight, high strength and toughness, and strong ability to adsorb and intercept pollutants. It is suitable for washing in water. After configuring the washing method, it can be well restored to cleanliness. It is applied to sewage filtration treatment. Compared with conventional filter materials, it has better filtration treatment effect.

[0027] S2: After the normal filtration is completed, the disturbance washing is carried out; when the disturbance washing is carried out, the water inlet electric valve is closed, the disturbance washing drainage electric valve is opened, and the disturbance washing motor and the disturbance washing paddle are started in sequence; initially, the water in the filter device flows down quickly, loosening the filter material, and the impurities trapped between the filter materials are taken away by the rapidly flowing water; then, under the action of the disturbance washing paddle, the pollutants adhering to the filter material are peeled off by the disturbance washing and taken away with the water flowing downward in the reverse direction; the wastewater generated by the disturbance washing eventually flows back into the water distribution port and is discharged through the disturbance washing drain pipe; the present invention proposes a method of disturbing and washing the filter material, and provides the structural form, size and operating parameters of the disturbance washing pulp, During the entire disturbing and washing process, at the moment the disturbing and washing drainage electric valve is opened, the filter material is mainly flushed by the water in the clear water area quickly flowing down, and the flushing intensity is relatively large. When the water level in the clear water area drops to the elevation of the top of the disturbing and washing drainage pipe, the water level stops dropping, and the outflow of water from another filter device through the connecting pipe is used to replenish the disturbing and washing water. At this time, the filter material is mainly cleaned by the disturbing and washing slurry, and the replenished disturbing and washing water is mainly used to carry away the pollutants stripped by the disturbing and washing. Compared with the backwashing method of conventional filter devices, the disturbing and washing method can clean the filter material in all directions without dead ends, requires very little disturbing and washing water, does not require a lot of flushing equipment, and is easy to operate.

[0028] S3: After the washing is completed, the washing motor and washing paddle are turned off in sequence, the washing drainage electric valve is closed, and the water inlet electric valve is opened to enter the next filtration cycle.

[0029] Beneficial effects of the present invention:

[0030] The water treatment filter device of the present invention adopts EPS foam filter beads as filter material and adopts a disturbing washing method to clean the filter material, which solves the problems existing in the current filter device in the treatment of domestic sewage in villages and towns. It has strong resistance to water volume and water quality impact, stable and reliable treatment effect, durability, less supporting equipment, simple operation and maintenance, fully automatic operation, small head loss, no need for secondary lifting pump, no need for backwashing equipment, equipment installed power and operating power consumption are reduced by more than 80%, equipment investment is low, and floor space and installation space are saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a cross-sectional structural diagram of a mechanical perturbation-washing water treatment and filtration device proposed by the present invention.

[0032] 1. Water distribution area;

[0033] 2. Filter material area;

[0034] 3. Filter plate and filter head;

[0035] 4. Clear water area;

[0036] 5. Super high area;

[0037] 6. Outlet weir;

[0038] 7. Disturb the washing motor;

[0039] 8. Disturbance and washing paddle;

[0040] 9. Water inlet electric valve;

[0041] 10. Water distribution outlet;

[0042] 11. Electric valve for washing and draining;

[0043] 12. Disturb the washing drainage pipe;

[0044] 13. Connecting pipe;

[0045] 14. Water outlet pipe.

[0046] Figure 2 This is a schematic diagram of the structure and dimensions of the disruptive wash paddle proposed in the present invention.

[0047] 15. Fence bars;

[0048] 16. Framework;

[0049] 17. Rotating axis.

[0050] Figure 3 This is a flow chart of the sewage treatment method proposed in the present invention.

[0051] Figure 4 This is the automatic control logic diagram of the sewage treatment method proposed in this invention.

[0052] Figure 5 This is a diagram showing the removal effect of SS (suspended solids) by the mechanical perturbation and washing water treatment and filtration device of the present invention. DETAILED DESCRIPTION

[0053] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0054] Reference Figure 1 A mechanical disturbance-washing water treatment and filtration device includes a water distribution area 1, a filter material area 2, a filter plate and filter head 3, a clean water area 4, an ultra-high area 5, a water outlet weir 6, a disturbance-washing motor 7, a disturbance-washing paddle 8, an inlet electric valve 9, a water distribution port 10, a disturbance-washing drainage electric valve 11, a disturbance-washing drainage pipe 12, a connecting pipe 13 and a water outlet pipe 14.

[0055] The interior of the water treatment and filtration device is composed of the super-high area 5, the water outlet weir 6, the clean water area 4, the filter material area 2, and the water distribution area 1 from top to bottom;

[0056] The disturbing and washing motor 7 is fixed on the top of the water treatment and filtering device, and a disturbing and washing paddle 8 is connected below it;

[0057] The agitation and washing paddle 8 is located in the filter material area 2 and is driven by the agitation and washing motor 7;

[0058] A layer of white spherical EPS foam filter beads is suspended in the filter material area 2 as filter material;

[0059] The filter plate filter head 3 is fixedly installed between the clean water area 4 and the filter material area 2, and the filter head is evenly inverted and installed on the filter plate;

[0060] The water distribution port 10 is connected to the water distribution area 1, and the water distribution port 10 is located in the center of the water distribution area 1, and the water distribution port 10 is vertically downward;

[0061] The water inlet electric valve 9 is connected to the water distribution port 10 through a pipeline;

[0062] The electric valve for disturbing washing and draining 11 is connected to the disturbing washing and draining pipe 12;

[0063] The outlet pipe 14 is connected to the outlet weir 6;

[0064] The connecting pipe 13 is connected to another water treatment and filtering device.

[0065] Preferably, the water treatment and filtration device is a circular or square steel tank with a diameter or side length D of 1.0 to 3.0 m, a height h1 of the water distribution area 1 of 0.8 to 1.0 m, a height h2 of the filter material area 2 of 0.8 to 1.2 m, a height h3 of the clear water area 4 of 0.6 to 1.0 m, a height h4 of the super-high area 5 of 0.3 to 0.4 m, and a total height of 3.0 to 3.5 m.

[0066] Preferably, the filter area 2 is filled with white spherical EPS foam filter beads as filter material. EPS foam filter beads are intermediate materials used for building insulation, packaging boxes, etc. They have the characteristics of low density, low water absorption, easy adhesion of pollutants, high mechanical properties, aging resistance, easy operation and installation, and have a good sewage filtering effect. They can also cooperate with the disturbing and washing paddle 8 to perform disturbing and washing. The particle size of the EPS foam filter beads selected as the filter material is 1.0-2.0 mm, and the bulk density is 25-50 kg / m 3 , the porosity is about 50% and the compression strength is greater than 100kPa to obtain the best filtering treatment effect and disturbing washing effect.

[0067] Preferably, the water distribution port 10 is a trumpet-shaped structure. The water distribution port 10 should be centered and vertically downward. The height e of the water distribution port 10 from the bottom of the water treatment filter device is 0.15 to 0.2 m. The size of the water distribution port 10 is designed according to the outlet water flow velocity not exceeding 0.1 m / s, so that the water intake and disturbing washing drainage do not affect the EPS foam filter beads suspended in the filter material area 2; the disturbing washing drainage pipe 12 should return upward, and the height f of the highest point from the filter plate filter head 3 is 0.2 to 0.3 m, so that the filter material area 2 is always submerged in water during disturbing washing.

[0068] Reference Figure 2 The disturbing wash paddle 8 includes bars 15 , a frame 16 , and a rotating shaft 17 .

[0069] The disturbing and washing paddle 8 is a frame-type grid structure;

[0070] The frame 16 is made of stainless steel square tubes and is connected to the rotating shaft 17;

[0071] The grid bars 15 are made of stainless steel flat steel and are evenly welded to the frame 16;

[0072] The agitating and washing paddle 8 is connected to the agitating and washing motor 7 through a rotating shaft 17 , and the agitating and washing paddle 8 is driven by the agitating and washing motor 7 .

[0073] Preferably, the width b of the bars 15 is 50 mm, the net spacing d of the bars 15 is 100-150 mm, the total width D of the disturbing and washing paddle 8 is 250 mm, the total height h2 is 175 mm, and it is centered in the filter material area 2, with the bottom elevation being consistent with the bottom elevation of the filter material area 2, so as to create a suitable disturbed flow pattern;

[0074] Preferably, the disturbing and washing motor 7 should be operated at a low speed, with the rotation speed controlled to be 10-15 r / min, so that the linear speed of the disturbing and washing paddle 8 is 60-90 m / min, so as to obtain a suitable disturbing and washing intensity.

[0075] Water treatment and filtering devices are generally used in groups. Two filtering devices can be used as a group. The clear water areas 4 of the two filtering devices are interconnected through a connecting pipe 13. All water treatment and filtering devices can share the water inlet main pipe, water outlet main pipe, and water washing and drainage main pipe.

[0076] Reference Figure 3 In a preferred embodiment, a complete sewage treatment method is as follows:

[0077] S1: During normal filtration, the disturbance and washing drainage electric valve 11 is closed, the disturbance and washing motor 7 and the disturbance and washing paddle 8 are turned off, and the water inlet electric valve 9 is opened. The sewage to be treated passes through the water distribution port 10 and enters the water distribution area 1 at the bottom of the water treatment and filtration device. The sewage rises evenly through the filter material area 2, and then passes through the filter plate filter head 3 to obtain clean water stored in the clean water area 4, and overflows from the upper part of the clean water area 4 into the outlet weir 6, and finally flows into the outlet pipe 14 for discharge; the normal filtration cycle is set in the automatic control program according to the treatment water quality. The normal filtration cycle is generally set to 12 to 24 hours. When the operation duration reaches the set time, the disturbance and washing work is automatically started.

[0078] S2: When the disturbing and washing operation is started, the water inlet electric valve 9 is closed, the disturbing and washing drain electric valve 11 is opened, and the disturbing and washing motor 7 and the disturbing and washing paddle 8 are started in sequence; initially, the water in the clean water area 4 flows down rapidly, loosening the filter material, and the impurities trapped between the filter materials are carried away by the rapidly flowing water, until the water level in the clean water area 4 drops to the top elevation of the disturbing and washing drain pipe 12, that is, the height f from the filter plate filter head 3 is 0.2 to 0.3 m, the water level stops dropping, and the outlet water of the other filter device is continuously replenished through the connecting pipe 13; at the same time, under the action of the disturbing and washing paddle, the pollutants adhering to the filter material are peeled off by the disturbing and washing, and are carried away by the water flowing downward in the reverse direction replenished by the connecting pipe 13; the wastewater generated by the disturbing and washing finally flows back into the water distribution port 10 and is discharged through the disturbing and washing drain pipe 12; the disturbing and washing duration is set in the automatic control program according to the water quality to be treated, and the disturbing and washing duration is generally set to 10 to 15 minutes. When the disturbing and washing duration reaches the set time, the disturbing and washing operation is automatically stopped and the next filtration cycle begins.

[0079] S3: After the disturbing and washing work is completed, the disturbing and washing motor 7 and the disturbing and washing paddle 8 are turned off in sequence, the disturbing and washing drainage electric valve 11 is closed, and the water inlet electric valve 9 is opened to enter the next filtration cycle.

[0080] Automatic control logic of sewage treatment method Figure 4 Please refer to it for further understanding.

[0081] In a preferred embodiment, the mechanical perturbation and washing water treatment and filtration device has a treatment effect on SS (suspended solids) as follows: Figure 5 As shown:

[0082] By Figure 5 It can be seen that the mechanical perturbation-washing water treatment and filtration device has a good removal effect on SS (suspended solids). In this embodiment, when the inlet SS (suspended solids) concentration is 15-20 mg / L, the outlet SS (suspended solids) concentration is basically stable at about 5 mg / L.

[0083] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A mechanical perturbation-washing water treatment and filtration device, comprising: Water distribution area (1), filter material area (2), filter plate filter head (3), clean water area (4), super-high area (5), water outlet weir (6), disturbing washing motor (7), disturbing washing paddle (8), water inlet electric valve (9), water distribution port (10), disturbing washing drainage electric valve (11), disturbing washing drainage pipe (12), connecting pipe (13) and water outlet pipe (14); The feature is that the interior of the water treatment and filtering device is composed of a super-high area (5), a water outlet weir (6), a clean water area (4), a filter material area (2), and a water distribution area (1) from top to bottom; The disturbing and washing motor (7) is fixed on the top of the water treatment and filtering device, and a disturbing and washing paddle (8) is connected below the motor; The disturbing and washing paddle (8) is located in the filter material area (2) and is driven by the disturbing and washing motor (7); A layer of white spherical EPS foam filter beads is suspended in the filter material area (2) as filter material; The filter plate filter head (3) is fixedly installed between the clean water area (4) and the filter material area (2), and the filter head is evenly inverted and installed on the filter plate; The water distribution port (10) is connected to the water distribution area (1), the water distribution port (10) is located in the center of the water distribution area (1), and the water distribution port (10) is vertically downward; The water inlet electric valve (9) is connected to the water distribution port (10) via a pipeline; The disturbing wash and drainage electric valve (11) is connected to the disturbing wash and drainage pipe (12); The water outlet pipe (14) is connected to the water outlet weir (6); The connecting pipe (13) is connected to another water treatment and filtering device.

2. A mechanical perturbation-washing water treatment and filtration device according to claim 1, characterized in that: The water treatment and filtration device is a circular or square steel tank with a diameter or side length D of 1.0 to 3.0 m, a water distribution area (1) with a height h1 of 0.8 to 1.0 m, a filter area (2) with a height h2 of 0.8 to 1.2 m, a clear water area (4) with a height h3 of 0.6 to 1.0 m, and a super-high area (5) with a height h4 of 0.3 to 0.4 m, with a total height of 3.0 to 3.5 m.

3. The mechanical perturbation-washing water treatment and filtration device according to claim 1, characterized in that: The particle size of the EPS foam filter beads is 1.0-2.0 mm, and the bulk density is 25-50 kg / m 3 , porosity is 50%, and compressive strength is greater than 100 kPa.

4. The mechanical perturbation-washing water treatment and filtration device according to claim 1, characterized in that: The water distribution port (10) is a trumpet-shaped structure. The water distribution port (10) should be centered and vertically downward. The height e of the water distribution port (10) from the bottom of the tank of the water treatment and filtering device is 0.15 to 0.2 m.

5. The mechanical perturbation-washing water treatment and filtration device according to claim 1, characterized in that: The control speed of the disturbing and washing motor (7) is 10-15 r / min, and the linear speed of the disturbing and washing paddle (8) is 60-90 m / min.

6. The mechanical perturbation-washing water treatment and filtration device according to claim 1, characterized in that: The disturbing washing paddle (8) comprises a grid bar (15); a frame (16); and a rotating shaft (17). The disturbing washing paddle (8) is a frame-type grid bar structure. The frame (16) is welded from a stainless steel square tube and connected to the rotating shaft (17). The grid bar (15) is made of a stainless steel flat steel material and is uniformly welded to the frame (16). The disturbing washing paddle (8) is connected to the disturbing washing motor (7) via the rotating shaft (17), and the disturbing washing motor (7) drives the disturbing washing paddle (8).

7. The mechanical perturbation-washing water treatment and filtration device according to claim 6, characterized in that: The width b of the bars (15) is 50 mm, the net spacing d of the bars (15) is 100-150 mm, the total width D of the disturbing and washing paddle (8) is 250 mm, the total height h2 is 175 mm, and it is centered in the filter material area (2), with the bottom elevation being consistent with the bottom elevation of the filter material area (2).

8. According to the mechanical perturbation-washing water treatment and filtration device of claims 1-7, the sewage treatment method thereof is as follows: S1: During normal filtration, the electric valve for drainage of the perturbation and washing system (11) is closed, the perturbation and washing motor (7) and the perturbation and washing paddle (8) are turned off, and the electric valve for water inlet (9) is opened. The sewage to be treated passes through the water distribution port (10) and enters the water distribution area (1) at the bottom of the perturbation and washing filter device. The sewage rises evenly through the filter material area (2) and then passes through the filter plate filter head (3). Clean water is obtained and stored in the clean water area (4). The water overflows from the upper part of the clean water area (4) and enters the water outlet weir (6). The water is finally discharged into the water outlet pipe (14). S2: After the normal filtration is completed, the disturbance washing is performed; when the disturbance washing is performed, the water inlet electric valve (9) is closed, the disturbance washing drainage electric valve (11) is opened, the disturbance washing motor (7) and the disturbance washing paddle (8) are started, and initially, the water in the filter device flows down quickly, loosening the filter material, and the impurities trapped between the filter materials are carried away by the rapidly flowing water; then, under the action of the disturbance washing paddle, the pollutants adhering to the filter material are peeled off by the disturbance washing and carried away by the water flowing downward in the reverse direction; the wastewater generated by the disturbance washing enters the water distribution port (10) in the reverse direction, and is finally discharged through the disturbance washing drainage pipe (12); S3: After the filtration is completed, the filtration motor (7) and the filtration paddle (8) are shut down in sequence, the filtration drainage electric valve (11) is closed, and the water inlet electric valve (9) is opened to enter the next filtration cycle.

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