CN103172155B - Integrated water purifying equipment for concurrent inclined plate precipitation - Google Patents

Abstract

The invention relates to an integrated water purification equipment for co-current sloping plate sedimentation, the main body of which is concentrically divided into inner, middle and outer three-layer cylinders, and is divided into a flocculation zone, a filtration zone and a co-current sloping plate sedimentation zone . The upper section of the cocurrent inclined plate sedimentation area is the water distribution area, the middle section is the inclined plate group area, and the lower end is the sludge thickening chamber. A water collection area is set between the water distribution area, the inclined plate group area and the filter area, and the bottom of the water collection area is connected with the inclined plate group area and the filter area through small holes. A circle of sloping plates is evenly arranged in the sloping plate group area. The inclination angle of the sloping plates is θ=30-45°. Small holes are set at the bottom of the catchment area corresponding to the positions between the ends of two adjacent sloping plates to connect the sloping plate groups. area and catchment area. The present invention applies the co-current inclined plate sedimentation technology to the integrated water purification equipment, combines flocculation, co-current inclined plate sedimentation and filtration, completes the treatment process independently and synergistically, and makes the three fully exert themselves Advantages, good processing effect, compact and reasonable, less land occupation, easy to install.

Description

Integrated water purification equipment with cocurrent inclined plate sedimentation

technical field

The invention relates to water treatment and purification equipment, in particular to an integrated water purification equipment used for sedimentation of co-current inclined plates in water supply and drainage.

Background technique

For a long time, water supply and drainage workers have been committed to the research and development of various integrated water purification equipment. At present, various integrated water purification equipment have been developed for this purpose, but these integrated water purification equipment are all conventional process combinations, which only combine flocculation, sedimentation, and filtration into various forms. But so far, the co-current inclined plate sedimentation technology has not been introduced into the integrated water purification equipment.

Cocurrent inclined plate (tube) sedimentation technology is a high-efficiency sedimentation technology. In 1967, under the cooperation of the School of Engineering of Chalmers University in Sweden and the Axel Johnson Industrial Research Institute, the "Lamera" separator (that is, the co-current inclined plate) was created, and a patent was applied to the United States in March of the following year . Since 1973, my country began to carry out experimental research on cocurrent inclined plate sedimentation. However, due to the following shortcomings of this precipitation technology, it is difficult to use this efficient precipitation technology in production practice:

1. The structure of the catchment area is very complicated. Since the direction of mud flow and water flow is the same during the sedimentation process of the co-current inclined plate sedimentation device, it is necessary to set up a water collection channel at the end of the sedimentation to collect clean water, and discharge the collected clean water through the return pipe. There are various shapes of catchment areas, such as knife shape, comprehensive resistance type, trapezoidal shape, etc., but the structure is very complicated, it is not convenient for construction and assembly, and the cost is expensive.

2. Since a catchment area needs to be set between the two sloping plates to collect the sunken water, the distance between the two sloping plates cannot be too small, so that the sedimentation area is limited to a certain extent. Moreover, a section of slippery mud plate is added at the end of the precipitation, which increases the cost and installation difficulty.

3. The holes in the water collection area are easy to block. The hole diameter of the water collection area is generally in the range of Φ4～Φ10mm. After the device has been running for a period of time, some holes are easily blocked and cannot work normally, which seriously affects the sedimentation efficiency of the device.

4. The body of the co-flow inclined plate sedimentation tank is unevenly distributed, and the liquid level of the inclined plate is similar to an advection type sedimentation tank body with water outlet along the way. Inlet is less, resulting in the concentration of sludge at the end is much higher than that at the rear, and there will be sludge accumulation on the inclined plate at the end.

Contents of the invention

The purpose of this invention is to introduce the co-current inclined plate sedimentation technology to the integrated water purification equipment, adopt a water collection structure that is simple, easy to collect sedimentation water, easy to separate mud and water, evenly distribute water collection, and have high space utilization for sedimentation The co-current inclined plate sedimentation structure with good effect integrates flocculation, co-current inclined plate sedimentation and filtration, and completes the treatment process independently and cooperatively, so that the three can fully exert their own advantages and achieve better treatment. Effect.

In order to realize above object, technical scheme of the present invention is:

An integrated water purification equipment for co-current inclined plate sedimentation. The main body of the equipment is a cylinder, which is concentrically divided into inner, middle and outer layers, wherein the inner layer is the flocculation area and the middle layer is the The filter area and the outer layer are co-current inclined plate sedimentation areas.

The water inlet pipe is connected with the upper end of the flocculation zone, and the outlet water of the flocculation zone is connected with the upper end of the settling zone of the co-current inclined plate.

The upper section of the co-current inclined plate settling area is a water distribution area, the middle section is an inclined plate group area, and the lower end is a sludge concentration chamber.

A water catchment area is set between the water distribution area of the cocurrent inclined plate settling area and the inclined plate group area and the filter area. The bottom of the water collection area is connected with the inclined plate group area and the filter area through small holes respectively; the lower end of the filter area is closed, The outlet pipe is connected from the lower part of the filter area, and the filtered water is discharged.

A circle of inclined plates is evenly arranged in the inclined plate group area, and the two sides of the inclined plate are fixed on the outer wall of the water collection area and the inner wall of the inclined plate group area. The inclination angle of the inclined plate is θ = 30-45°, The small hole is arranged at the bottom of the water collection area corresponding to the position between the ends of two adjacent inclined plates, and communicates with the inclined plate group area and the water collection area.

The shape of the sloping plate is taken from the shape of a section of an ellipse ring formed by two concentric ellipses with the same long-short axis ratio, the inner ellipse minor _axis A = R _, the inner ellipse major _axis B = R _/ cosθ , the minor axis of the outer ellipse A _outer = R _outer , the major axis of the outer ellipse B _outer = R _outer / cosθ, where R _inner is the radius of the outer wall of the catchment area, and R _outer is the radius of the inner wall of the inclined plate group area; the two ellipses It is obtained by virtual oblique cutting at an angle of θ = 30-45° on the inner wall of the inclined plate group and the outer wall of the catchment area. The short side of the inclined plate is the straight line part of the difference between the minor axes of the two ellipses. The long side of the ellipse is taken as the line part close to the end point of the long axis of the outer ellipse and perpendicular to the long axis. The inner ellipse side between the sides is the inner side of the inclined plate, and the outer ellipse side between the short side and the long side is the outer side of the inclined plate.

This integrated water purification equipment adopts flocculation + co-current inclined plate sedimentation + filtration. Compared with the prior art, the present invention has the following advantages:

1. Innovatively apply the co-current inclined plate sedimentation technology to the small integrated water purification equipment, give full play to the advantages of the co-current inclined plate sedimentation, compact structure and small footprint.

2. The flocculation area adopts reinforced grid plate, which has a good flocculation effect. There is a mud bucket in the area, so that the mud deposited in the flocculation area can be eliminated, and a fan-shaped inclined plate is installed at the end of the flocculation area to increase the cross-sectional area. Thereby reducing the flow rate and creating favorable conditions for the flocs to better enter the sedimentation area for sedimentation. The water after flocculation is evenly distributed along the circle of the ring sedimentation area, with good hydraulic conditions and uniform water distribution.

3. The co-current inclined plate sedimentation area adopts the co-current inclined plate sedimentation device, which has uniform water distribution, basically no dead water area, good hydraulic conditions, simple structure of water collection area and inclined plate, and is convenient for construction and installation.

4. The structure of the water collection area is simple, and it is located in the upper part of the filtration area, which neither affects the effective filtration area of the filtration area nor occupies the effective space of the sedimentation area, thereby increasing the space utilization rate of the cylinder.

5. The flocculation area, co-flow inclined plate sedimentation area, and filtration area are set in a concentric cylinder with a compact and reasonable structure. The three complete the treatment process independently and cooperatively.

6. Sludge concentration relies on gravity and water thrust to concentrate together, the solid content of sludge is high, and the sludge is concentrated twice through the inclined plate room and the concentration chamber, and the sludge concentration effect is good.

Description of drawings

Fig. 1-plane I-I sectional schematic diagram of the present invention;

Fig. 2-plan view of the present invention;

Figure 3 - Schematic diagram of the inclined plate of the present invention.

Detailed ways

Structure and working process of the present invention are described in detail below in conjunction with accompanying drawing:

1. Structural composition

Referring to Fig. 1 and shown in Fig. 2, the main body structure of the equipment of the present invention is a cylinder 28, and cylinder 28 is supported by interior equilateral triangular support 24, forms an upper end open, the overall structure of lower end closure. The cylindrical body can be divided into upper and lower parts in terms of shape, wherein the upper part is cylindrical and the lower part is truncated. The upper cylindrical area is concentrically divided into three large areas. From the inside to the outside are the flocculation area 1, the filtration area 3 (including the water collection area 4), and the sedimentation area 2. The lower part mainly has a mud chamber with a frustum-shaped inner layer. 13 and the truncated sludge concentration chamber 15 of the outer layer. The outside of the cylinder 28 is arranged with a water inlet pipe 25, an outlet pipe 17, a centrifugal pump 20, a dosing pump 21, a pipeline static mixer 22, a flow meter 23, a backwash water inlet pipe 26, a backwash pump 16, and a backwash water outlet pipe 18 , sludge chamber mud discharge pipe 12, sludge concentration chamber mud discharge pipe 14, etc., they are arranged in a conventional form to form a backwashing system, an inlet and outlet water system, and a mud discharge system.

The following is a detailed description of the structural layout of several functional areas of this equipment:

The flocculation zone 1 is concentrically divided into two circular areas, the water inlet pipe 25 is connected to the upper end of the first flocculation zone 1-1, and the first flocculation zone 1-1 is connected to the lower end of the second flocculation zone 1-2 and shares a mud deposit Bucket 13 connects the mud discharge pipe 12. Each area is provided with a transverse grid plate 11, and the spacing between the grid plates and the hole diameter on the plate gradually increase with the flow direction of the water flow. The edge of the outlet at the upper end of the second flocculation zone 1-2 is provided with a fan-shaped sloping plate 27 to expand the outlet area and communicate with the water distribution zone 10 at the upper end of the co-current sloping plate sedimentation zone 2 . The fan-shaped inclined plate can increase the cross-sectional area and reduce the flow velocity, thereby creating better hydraulic conditions for the flocs.

The lower end of the filter area 3 is closed, and the upper end is closed by a fan-shaped inclined plate 27, and the filtration is performed in the form of downward flow. There are filter water level 3-1, filter layer 8, short handle filter head 9 and water collecting channel 3-2 from top to bottom, and outlet pipe 17 connects from water collecting channel 3-2. A circle of backwash sump 19 is provided at a certain height near the outer partition in the middle section of the filter area, and a backwash outlet pipe 18 is connected with it.

The catchment area 4 is set between the water distribution area 10 of the co-current inclined plate settling area 2 and the upper section of the inclined plate group area 5 and the filter area 3, which is separated by a circle at the upper section of the filter area 3 and occupies a certain space. The upper end of the concentrated water area is closed by the fan-shaped inclined plate 27, and the bottom is also closed, and only communicates with the inclined plate group area 5 and the filter area 3 through the small holes 6 and 7 respectively.

The upper section of the sedimentation area 2 is the water distribution area 10 , the middle section is the inclined plate group area 5 with several single inclined plates (see Figure 3 ), and the lower section is the sludge concentration chamber 15 . A circle of inclined plates 5-1 is evenly arranged in the inclined plate group area, and the two sides of the inclined side are fixed on the outer wall of the catchment area and the inner wall of the inclined plate group area. The inclination angle of the inclined plate 5-1 relative to the horizontal plane is θ = 30-45°, the small hole 6 is set at the bottom of the water collection area corresponding to the position between the ends of two adjacent inclined plates, connecting the inclined plate group area and the water collection area.

Referring to Fig. 3, the shape of the inclined plate 5-1 in the inclined plate group area is designed in the following way: it is a section in an elliptical ring formed by two concentric ellipses with the same long-short axis ratio, and the minor axis A of the inner ellipse is _Inner = Rinner _, the major axis of the inner ellipse _Binner = Rinner / cosθ , the _minor axis of the outer ellipse Aouter = _Router , the major axis _of the outer ellipse _Bouter = _Router / cosθ, where _Rinner is the radius of the outer wall of the catchment area, R _outside is the radius of the inner wall of the inclined plate group area; the two ellipses are obtained by virtual oblique cutting at an angle of θ = 30-45° on the inner wall of the inclined plate group area and the outer wall of the catchment area. The short side is the straight line part of the difference between the short axes of the two ellipses, and the long side of the inclined plate is the straight line part close to the end point of the long axis of the outer ellipse and perpendicular to the long axis. The short side is parallel to the long side, and the short side is the hypotenuse The upper end and the long side are the lower end of the inclined plate; in addition, the inner ellipse between the short side and the long side is taken as the inner side of the inclined plate, and the outer ellipse between the short side and the long side is taken as the outer side of the inclined plate. In the figure, the solid line part is the inclined plate.

In addition, an obliquely downward baffle 5-2 is provided on the slant plate near the short side of the slant plate. The baffle plate extends from the inner side of the slant plate to the outer side of the slant plate. To connect, or not to connect. The included angle from the starting point of the baffle to the center of the ellipse and from the center of the ellipse to the side of the minor axis is 30°.

2. Working process

1. Processing process

When the integrated water purification equipment is working, the raw water is lifted by the centrifugal pump 20, dosed by the dosing pump 21, fed by the pipeline static mixer 22, passes through the flow meter 23, and enters the upper end of the first flocculation zone 1-1 after being fully coagulated. The coagulated raw water passes through the grid 11 from the upper end of the first flocculation area to generate micro-vortex, continuously flocculates and flows downward through the lower end into the second flocculation area 1-2 to continue flocculation (after running for a certain period of time, open the sludge discharge valve 12-1 mud discharge), in the second flocculation zone, the water flows from bottom to top to the upper end, crosses the fan-shaped inclined plate 27 at the upper end of the filter zone 3 and the water collection zone 4, and enters the water distribution zone 10 of the sedimentation zone 2 for uniform water distribution along the ring, and completes The flocculation time after the second flocculation zone is 12 minutes, and the flocculation effect is good. After the flocculated muddy water enters the sedimentation zone 2, it is evenly distributed in the water distribution zone 10 and enters the inclined plate group zone 5 for sedimentation. The chamber 15 is used for concentration (after the sludge has been concentrated for a certain period of time, the sludge discharge valve 14-1 must be opened to discharge the sludge), and the clean water enters the water collection area 4 through the small hole 6, and then enters the filter area 3 through the small hole 7. After passing through the filter layer 8 in the filter area, the short handle filter head 9 and the water collecting channel 3-2 are discharged through the outlet pipe 17 to filter the water. The equipment should be backwashed after running for a cycle.

2. Backwashing process

First close the water inlet pipe valve 25-1, the water outlet pipe valve 17-1 and the water inlet pump 20. Open the backwash outlet pipe valve 18-1, the backwash pump 16 and the backwash water inlet valve 16-1. After 5 minutes of backflushing, close the backwash valve, backwash the water inlet pump, backwash the water outlet pipe valve, then turn on the water inlet pump, open the water inlet pipe valve, and the water outlet pipe valve.

Claims (3)

1. Integrated water purification equipment for co-current inclined plate sedimentation, the main body of the equipment is a cylinder (28), and the inside of the cylinder (28) is concentrically divided into inner, middle and outer layers, wherein the inner The first layer is the flocculation area (1), the middle layer is the filtration area (3), and the outer layer is the cocurrent inclined plate sedimentation area (2); It is characterized in that: the water inlet pipe (25) is connected to the upper end of the flocculation area (1), and the water outlet of the flocculation area (1) is connected to the upper end of the co-current inclined plate sedimentation area (2); The upper section of the cocurrent inclined plate sedimentation area (2) is the water distribution area (10), the middle section is the inclined plate group area (5), and the lower end is the sludge concentration chamber (15); in the cocurrent inclined plate sedimentation area (2 ) between the water distribution area (10) and the inclined plate group area (5) and the middle filter area (3) is provided with a water collection area (4). The bottom of the water collection area is closed and passes through the small holes (6, 7) and The inclined plate group area (5) is connected to the filter area (3); The lower end of the filter area (3) is closed, and the outlet pipe (17) is connected from the lower part of the filter area (3) to discharge the filtered water; A circle of sloping plates (5-1) is evenly arranged in the sloping plate group area (5) of the co-current sloping plate sedimentation zone, and the two sides of the sloping plate (5-1) are fixed on the outer wall of the water collection area (4) and on the inner wall of the sloping plate group area (5), the inclination angle of the sloping plate (5-1) is θ = 30-45°, and the small holes (6) are set at the bottom of the water collection area corresponding to two adjacent sloping plates The position between the ends of the slope connects the inclined plate group area and the catchment area; The flocculation zone (1) is concentrically divided into two circular areas, namely the first flocculation zone (1-1) and the second flocculation zone (1-2), in which there are horizontal grid plates (11), The spacing between the grid plates (11) and the apertures on the plates gradually increase with the flow direction of the water flow. The water inlet pipe (25) is connected to the upper end of the first flocculation zone (1-1), and the first flocculation zone (1-1) It communicates with the lower end of the second flocculation area (1-2) and shares a mud hopper (13) to connect to the mud discharge pipe; the edge of the upper outlet of the second flocculation area (1-2) is provided with a fan-shaped sloping plate (27), Enlarging the outlet area to communicate with the water distribution area (10) at the upper end of the cocurrent inclined plate sedimentation area (2); The water collection area (4) is located in the filter area, occupying part of the upper part of the filter area (3), and the upper ends of the water collection area (4) and the filter area (3) are closed by fan-shaped inclined plates (27); The inclined plate is a section of an elliptical ring formed by two concentric ellipses with _the same long-short axis ratio, the minor axis _of the inner ellipse A = R , the major axis of the _inner ellipse B = R _/ cosθ , and the outer ellipse is short Axis A _outside = R _outside , outer ellipse major axis B _outside = R _outside / cosθ, where R _inside is the radius of the outer wall of the catchment area, R _outside is the radius of the inner wall of the inclined plate group; the two ellipses are on the inclined plate The inner wall of the group area and the outer wall of the catchment area are obtained by virtual oblique cutting at an angle of θ = 30-45°. The short side of the inclined plate is taken as the straight line part of the difference between the minor axes of the two ellipses, and the long side of the inclined plate is taken as Close to the end point of the long axis of the outer ellipse and perpendicular to the long axis, the short side is parallel to the long side, the short side is the upper end of the hypotenuse, and the long side is the lower end of the inclined plate; The inner ellipse is the inner side of the inclined plate, and the outer ellipse between the short side and the long side is the outer side of the inclined plate. 2. The integrated water purification equipment for co-current sloping plate sedimentation according to claim 1, characterized in that: a slanted downward baffle (5-2) is provided on the sloping plate near the short side of the sloping plate, so that The baffle plate extends from the inner side of the slanted plate to the outer side of the slanted plate, and the baffle plate can be connected with adjacent slanted plates or not. 3. The integrated water purification equipment with co-current inclined plate sedimentation according to claim 2, characterized in that: the angle between the starting point of the baffle plate to the center of the ellipse and the center of the ellipse to the side of the minor axis is 30°.

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