Micro-vortex multi-stage baffling efficient coagulation aiding equipment

Abstract

The utility model relates to micro-vortex multi-stage baffling efficient coagulation aid equipment which comprises a flocculation basin, a plurality of rows of mixing cavities are arranged in the flocculation basin, in each row of mixing cavities, a first partition plate is arranged between every two adjacent mixing cavities, a second partition plate is arranged between every two adjacent rows of mixing cavities, and a third partition plate is arranged between every two adjacent first partition plates. A plurality of first micropores communicated with two adjacent mixing cavities are formed in the top of one first partition plate, and a plurality of micropores communicated with two adjacent mixing cavities are formed in the bottom of the other first partition plate, so that wastewater flows along a wavy path in each row of mixing cavities; a plurality of second micropores communicated with two adjacent rows of mixing cavities are formed in the top or the bottom wall of one end of the second partition plate. After the wastewater passes through the micropores, a large number of tiny vortexes appear in the wastewater due to the change of the flowing direction, the change of the flowing direction and the change of the flow speed, and the tiny vortexes can effectively perform positive and negative charge attraction bridging connection on ground phosphate rock particles with the particle size of 2-8 microns, so that sufficient collision and agglomeration of fine particles and chemicals in the water are promoted.

Description

Technical Field

[0001] The utility model belongs to the field of sewage treatment equipment, in particular to a micro-eddy current multi-stage baffled high-efficiency coagulation-aiding equipment. Background Art

[0002] The suspended matter in the phosphate mine water has small particle size, light specific gravity and slow sedimentation rate. The diameter of suspended particles in the mine water is small, averaging only 2 to 8 microns, and more than 85% of the total suspended matter has a particle size below 5 microns; the ζ potential of suspended matter in mine water is -30.15 to -19.14 mV, all showing different degrees of negative charge, making the suspended matter in the mine water behave like colloidal particles, difficult to settle freely, difficult to form alum flocs during coagulation, and poor sedimentation effect. Traditional flocculation and clarification technology relies on a stirrer to force the mine water and the reagent to stir and react. Due to continuous hydraulic agitation, the alum flocs that have been flocculated are easily destroyed, and it is difficult to form stable and larger alum flocs, resulting in the inability to capture phosphate rock powder with a particle size of about 5um during mine water treatment. As the wastewater is entrained, the phosphate mine wastewater treatment exceeds the standard, with a value of more than 0.2 mg / L. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a micro-vortex multi-stage baffled high-efficiency coagulation aid device, which can promote the coagulation of tiny suspended matter, will not break the formed alum flowers, and improve the removal rate of suspended matter.

[0004] To solve the above problems, the technical solution adopted by the utility model is: micro-vortex multi-stage baffled high-efficiency coagulant equipment, including a flocculation tank, in which multiple rows of mixing chambers are arranged, in each row of mixing chambers, a first partition is arranged between two adjacent mixing chambers, and a second partition is arranged between two adjacent rows of mixing chambers. In two adjacent first partitions, the top of one of the first partitions is provided with a plurality of first micropores connecting the two adjacent mixing chambers, and the bottom of the other first partition is provided with a plurality of micropores connecting the two adjacent mixing chambers, so that the wastewater flows along a wavy path in each row of mixing chambers, and the top or bottom wall of one end of the second partition is provided with a plurality of second micropores connecting the two adjacent rows of mixing chambers.

[0005] Furthermore, the first partition plate and the second partition plate each include a plurality of inclined plates sequentially connected from top to bottom, and the horizontal cross-sectional area of ​​each mixing chamber changes from top to bottom.

[0006] Furthermore, the angle between two adjacent inclined plates is 90°.

[0007] The beneficial effect of the utility model is that a large number of micropores are arranged on the first partition plate and the second partition plate, when the wastewater passes through the micropores, the flow velocity will change, and because the wastewater moves along a wavy path, the flow direction of the wastewater changes after passing through the micropores, and the change of the flow direction and the change of the flow velocity cause a large number of tiny vortices to appear in the wastewater, and the tiny vortices can effectively attract and bridge the phosphate rock powder particles with a particle size between 2 and 8 microns, promote the full collision and coagulation of fine particles in the water and the reagent, and then through multi-stage deflection, the hydraulic retention time is extended, so that a large number of flocs (alum flowers) with larger particle sizes accumulate in the reactor and are suspended in the water, thereby realizing rapid destabilization, flocculation and agglomeration of the phosphate rock wastewater, thereby realizing solid-liquid separation, effectively capturing and intercepting the phosphate rock powder in the mine water, and reducing the phosphorus content of the mine water to between 0.08 and 0.15 mg / L, which is lower than the surface water quality standard of Class III (phosphorus ≤ 0.2 mg / L). BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a top view schematic diagram of the utility model;

[0009] Figure 2 yes Figure 1 Schematic cross-sectional view of AA in the figure;

[0010] Figure 3 yes Figure 1 A schematic cross-sectional view of the middle BB;

[0011] The arrows in the figure indicate the direction of wastewater flow;

[0012] Figure numerals: 1—flocculation tank; 2—mixing chamber; 3—first partition; 4—second partition; 5—first micropore; 6—second micropore. DETAILED DESCRIPTION

[0013] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0014] The micro-eddy current multi-stage baffle high-efficiency coagulation aid device of the utility model is as follows Figures 1 to 3 As shown, it includes a flocculation tank 1, in which multiple rows of mixing chambers 2 are arranged. In each row of mixing chambers 2, a first partition 3 is arranged between two adjacent mixing chambers 2, and a second partition 4 is arranged between two adjacent rows of mixing chambers 2. In two adjacent first partitions 3, the top of one of the first partitions 3 is provided with multiple micropores connecting the two adjacent mixing chambers 2, and the bottom of the other first partition 3 is provided with multiple first micropores 5 connecting the two adjacent mixing chambers 2, so that the wastewater flows along a wavy path in each row of mixing chambers 2, and the top or bottom wall of one end of the second partition 4 is provided with multiple second micropores 6 connecting the two adjacent rows of mixing chambers 2.

[0015] The flocculation tank 1 adopts a rectangular tank body with an open top, which can be a metal tank body, a concrete tank body, etc. A plurality of second baffles 4 and a first baffle 3 divide the inner cavity of the flocculation tank 1 into a plurality of mixing chambers 2, each mixing chamber 2 having an inlet side and an outlet side. Wastewater enters the mixing chamber 2 from the top or bottom of the inlet side and is discharged from the mixing chamber 2 from the top or bottom of the outlet side. When wastewater enters a mixing chamber 2 from the top of the inlet side, it is discharged from the bottom of the outlet side. When wastewater enters a mixing chamber 2 from the bottom of the inlet side, it is discharged from the top of the outlet side, ensuring that the flow direction of wastewater changes after entering the next mixing chamber 2. At the same time, the flow path of wastewater can be increased, and the residence time of wastewater in the flocculation tank 1 can be extended to ensure sufficient flocculation reaction.

[0016] After adding flocculants to the wastewater, it is passed into the flocculation tank 1. The flocculants can be aluminum oxide, polyacrylamide (PAM), calcium hydroxide, ferrous sulfate (PFS) and crystalline aluminum chloride (PAC). A large number of first micropores 5 are set on the first partition 3, and a large number of second micropores 6 are set on the second partition 4. The diameters of the first micropores 5 and the second micropores 6 are about 1 mm. When the wastewater passes through the first micropores 5 and the second micropores 6, the flow rate will change. Since the wastewater moves along a wavy path, the flow direction of the wastewater changes after passing through the micropores. The changes in the flow direction and the flow rate make the wastewater A large number of tiny vortices appear, which can effectively attract and bridge the phosphate rock powder particles with a particle size of 2 to 8 microns, promote the full collision and condensation of fine particles and reagents in the water, and then through multi-stage deflection, extend the hydraulic retention time, so that a large number of larger flocs (alum flowers) accumulate in the reactor and suspend in the water, achieving rapid destabilization, flocculation and agglomeration of phosphate mine wastewater, thereby realizing solid-liquid separation, and effectively capturing and intercepting phosphate rock powder in mine water. The phosphorus content of mine water is reduced to between 0.08-0.15 mg / L, which is lower than the surface water Class III water quality standard (phosphorus ≤ 0.2 mg / L).

[0017] The first baffle 3 and the second baffle 4 each include a plurality of inclined plates connected in sequence from top to bottom, and the horizontal cross-sectional area of ​​each mixing chamber 2 changes from top to bottom. The first baffle 3 and the second baffle 4 are each composed of a plurality of inclined plates, and the angle between the inclined plates and the horizontal plane is an acute angle or an obtuse angle, so that the horizontal cross-sectional area of ​​the mixing chamber 2 changes from top to bottom. Therefore, when the wastewater flows from top to bottom or from bottom to top, the area of ​​the flow channel is constantly changing, so the flow rate of the wastewater will also change, which is conducive to the formation of turbulence and promotes the full collision and coagulation of fine particles and reagents in the water.

[0018] The angle between two adjacent inclined plates can be 45°, 60°, 90°, 120°, etc., and flocculant PAC and coagulant aid polyacrylamide (12 million molecular weight, solid content: ≥90%) are added to the phosphorus-containing raw water with a concentration of 30 mg / L, and then the raw water is respectively passed into the flocculation tank 1 with inclined plate angles of 45°, 60°, 90°, and 120° for flocculation reaction, and the phosphorus concentration of the sampled sediment at the outlet of the flocculation tank 1 and the supernatant after 30 minutes of precipitation is measured. In order to compare the effects of inclined plates at different angles on the flocculation reaction effect of phosphorus-containing wastewater, the structure is shown in the following table:

[0019]

[0020] It can be seen that when the angle between two adjacent inclined plates is 90°, the flocculation effect is best.

[0021] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. Micro-vortex multi-stage baffle high-efficiency coagulation aid equipment, characterized by: The invention comprises a flocculation tank (1), wherein a plurality of rows of mixing chambers (2) are arranged in the flocculation tank (1), wherein in each row of mixing chambers (2), a first partition (3) is arranged between two adjacent mixing chambers (2), and a second partition (4) is arranged between two adjacent rows of mixing chambers (2). In two adjacent first partitions (3), a plurality of micropores for connecting the two adjacent mixing chambers (2) are arranged on the top of one of the first partitions (3), and a plurality of first micropores (5) for connecting the two adjacent mixing chambers (2) are arranged on the bottom of the other first partition (3), so that wastewater flows along a wavy path in each row of mixing chambers (2), and a plurality of second micropores (6) for connecting the two adjacent rows of mixing chambers (2) are arranged on the top or bottom wall of one end of the second partition (4).

2. The micro-eddy current multi-stage baffled high-efficiency coagulation aid device according to claim 1, characterized in that: The first partition plate (3) and the second partition plate (4) both comprise a plurality of inclined plates connected in sequence from top to bottom, and the horizontal cross-sectional area of ​​each mixing chamber (2) changes from top to bottom.

3. The micro-eddy current multi-stage baffled high-efficiency coagulation aid device according to claim 2, characterized in that: The angle between two adjacent inclined plates is 90°.

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