CN102126774A - Short-time flocculation and high speed sedimentation sewage treatment device - Google Patents

Abstract

The invention discloses a short-time flocculation-high-speed sedimentation sewage treatment device, which belongs to the technical field of sewage treatment. Through the action of an external magnetic field, the floc sedimentation is accelerated to achieve the purpose of efficient and rapid treatment. The device of the present invention consists of a water inlet pipe, a pipeline mixer, a flocculant dosing port, a fast stirring paddle, a rectangular water outlet, a baffle, a slow stirring paddle, a circular water outlet, a magnet placement table, a strong magnet, a mud discharge pipe, and a control It is composed of valve, magnetic separator, screw conveying pipe, outlet baffle and outlet pipe. After passing through the pipeline mixer, the sewage reaches the fast stirring area, where it is mixed and reacted successively under the action of the fast stirring paddle and the slow speed stirring paddle, and then settles rapidly under the action of the strong magnet to achieve the purpose of treatment and purification. The invention has the advantages of simple structure, low construction cost, large treatment capacity and short treatment time, and is suitable for rapid treatment of a large amount of overflow sewage.

Description

A short-time flocculation-high-speed sedimentation sewage treatment device

technical field

The invention belongs to the technical field of sewage treatment, and in particular relates to an overflow sewage treatment device, which is used for rapid treatment and purification of overflow sewage.

Background technique

With the acceleration of urbanization, the area of built-up areas continues to expand, resulting in a substantial increase in impermeable areas, resulting in an increase in runoff coefficient, an earlier flood peak, and an increase in flood volume under the same rainfall conditions, which poses a huge impact on urban drainage and river flood discharge. pressure. During the rainfall process, the rainwater and the formed runoff flow through the urban ground, scouring and accumulating a series of pollutants, resulting in high pollutant content in the overflow sewage, large changes, and complex components. The overflow sewage does not undergo any treatment. Directly discharged into water bodies, causing serious pollution to urban water bodies. And because the overflow pollution is generated in rainy days, its discharge is intermittent, sudden, random, and the instantaneous discharge is large, which has caused great difficulties for the treatment of urban runoff pollutants [2,3]. Therefore, the development of A process with fast start-up, high handling loads and resistance to hydraulic shock.

Domestically, the treatment of combined sewage overflow is basically blank, but there are already many sets of commercialized treatment devices abroad, mainly Densadeg, Actiflo, Lamella Clarifier and other processes. The coagulation theory is a complete coagulation-sedimentation treatment unit that does not depend on the storage tank, but there are still shortcomings such as large flocculant dosage, large sludge production, and high treatment costs.

Contents of the invention

The object of the present invention is to provide an algae removal device which can realize a large amount of treatment with short treatment time and low operating cost.

In order to achieve the above object, the present invention consists of three parts: fast stirring zone, slow stirring zone and sedimentation zone, including water inlet pipe, pipeline mixer, flocculant dosing port, fast stirring paddle, rectangular nozzle, baffle, slow speed Stirring paddle, circular water outlet, magnet placement table, strong magnet, mud discharge pipe, control valve, magnetic separator, screw conveying pipe, outlet baffle, outlet pipe. The water inlet pipe is located at the bottom of the device, and there is a pipeline mixer between the water inlet pipe and the fast stirring zone; the flocculant dosing port is connected to the pipeline mixer above; A rectangular water outlet is set on the upper part of the partition plate, a baffle is set on the upper part of the rectangular water outlet side of the slow stirring zone, and a slow stirring paddle is set in the middle; a circular water outlet is set on the upper part of the partition between the slow stirring zone and the sedimentation zone, and its position Slightly lower than the rectangular water outlet; a 45-degree sloping plate is set at the bottom of the sedimentation area, and a drawer-shaped magnet placement table is arranged at the bottom of the sloping plate, and a strong magnet is placed on it; the upper part of the water outlet side of the sedimentation area is equipped with a water outlet baffle, and the height of the baffle is Two-thirds of the area, the outlet is connected to the outlet pipe, and its position is slightly lower than the circular outlet in the slow stirring area; the bottom of the sedimentation area is connected to the mud discharge pipe, which is connected to the magnetic separator, and the mud discharge pipe is separated from the magnetic separator. A control valve is set between the separators; the magnetic separator is connected to the flocculant feeding port through a spiral conveying pipe.

When using this device, the overflow sewage with a certain pressure enters from the water inlet pipe, first mixes with the magnetic seed and flocculant in the pipeline mixer, then enters the fast stirring zone and slow stirring zone to enhance the coagulation effect, and then enters the sedimentation area, it settles rapidly under the action of a strong magnet. When the sludge in the sedimentation area accumulates to a certain extent, the control valve is opened, and the magnetic seeds in the sludge are separated by the magnetic separator, and are transported to the flocculant dosing port by the spiral conveying pipe to realize the reuse of the magnetic seeds.

The beneficial effect of the invention is that the setting of the strong magnet realizes the rapid sedimentation of the flocs and achieves the purpose of rapid processing of large quantities. The invention has the advantages of simple structure, low construction cost and small floor area, and can realize efficient treatment of overflow sewage.

Description of drawings

Figure 1 is a schematic structural diagram of a short-term flocculation-high-speed sedimentation sewage treatment device.

In the figure, 1—water inlet pipe, 2—pipeline mixer, 3—flocculant dosing port, 4—fast stirring paddle, 5—rectangular water outlet, 6—baffle plate, 7—slow speed stirring paddle, 8—circular Water outlet, 9—magnet placement platform, 10—magnet, 11—exit baffle, 12—water outlet pipe, 13—sludge discharge pipe, 14—control valve, 15—magnetic separator, 16—screw conveying pipe.

Detailed ways

As shown in Figure 1, this sewage treatment device includes a water inlet pipe 1, a pipeline mixer 2, a flocculant dosing port 3, a fast stirring paddle 4, a rectangular water outlet 5, a baffle 6, a slow stirring paddle 7, a circular outlet Nozzle 8, magnet placement table 9, strong magnet 10, outlet baffle plate 11, outlet pipe 12, mud discharge pipe 13, control valve 14, magnetic separator 15, screw conveying pipe 16.

When using this device, the overflow sewage with a certain pressure enters from the water inlet pipe 1, and at the same time, flocculant and magnetic seeds are added through the flocculant dosing port 3, and then mixed in the pipeline mixer 2, and then enters the rapid stirring zone and In the slow-speed stirring zone, the coagulation effect is enhanced under the action of the fast stirring paddle 4 and the slow-speed stirring paddle 7, and then enters the sedimentation zone, where it settles rapidly under the action of the strong magnet 10. When the sludge in the sedimentation area accumulates to a certain extent, the control valve 14 is opened, and the sludge reaches the magnetic separator 15 through the sludge discharge pipe 13. Transport to the flocculant dosing port 3 to realize the reuse of magnetic seeds.

Claims (3)

1. waste disposal plant of flocculation-high speed sedimentation in short-term, it is characterized in that, by quick stirring area, stirring area and settling region three parts are formed at a slow speed, comprise water inlet pipe (1), line mixer (2), flocculant concentration mouth (3), stirring rake (4), rectangle water outlet (5), baffle plate (6), stirring rake (7), circular water outlet (8), magnet mounting table (9), strong magnet (10), water outlet baffle plate (11), rising pipe (12), shore pipe (13), control valve (14), magnetic separator (15), spiral conveying tube (16) at a slow speed fast; Described water inlet pipe (1) is positioned at bottom of device, is provided with line mixer (2) between water inlet pipe (1) and the quick stirring area; Connect flocculant concentration mouth (3) above the line mixer (2); Fast be provided with quick stirring rake (4) in the stirring area, fast stirring area and at a slow speed between the stirring area top of dividing plate establish rectangle water outlet (5), the top of stirring area rectangle water outlet (5) one sides baffled (6) at a slow speed, stirring rake (7) is at a slow speed established in the centre; Circular water outlet (8) is established on dividing plate top between stirring area and the settling region at a slow speed; 45 degree swash plates are established in the bottom, settling region, and magnet mounting table (9) is established in the swash plate bottom, places strong magnet (10) above; The top of water outlet one side of settling region sets out water baffle plate (11), highly is 2/3rds of settling region; Water outlet connects rising pipe (12); The bottom, settling region connects shore pipe (13), and shore pipe (13) connects magnetic separator (15), between shore pipe (13) and the magnetic separator (15) control valve (14) is set; Magnetic separator (15) links to each other with flocculant concentration mouth (3) by spiral conveying tube (16).

2. as the waste disposal plant of flocculation-high speed sedimentation in short-term as described in claims 1, it is characterized in that described circular water outlet (8) position is lower than rectangle water outlet (8); Described rising pipe (12) position is lower than circular water outlet (8).

3. as the waste disposal plant of flocculation-high speed sedimentation in short-term as described in claims 1, it is characterized in that described magnet mounting table is a drawer-like, place strong magnet (10) above.