Electric flocculation air flotation device

Abstract

The utility model provides an electric flocculation air floatation device, which is characterized in that a dosing area, a release area, an electric flocculation area, a settling area and a clear water area which are sequentially communicated are arranged in a tank body, a releaser for generating bubbles is arranged at the bottom of the release area, the release area and the electric flocculation area are separated by an overflow plate, and sewage in the release area overflows into the electric flocculation area; a slag collecting tank is arranged behind the electric flocculation area, a slag scraping mechanism is arranged above the electric flocculation area, a slag scraping plate on the slag scraping mechanism extends into the water surface of the electric flocculation area to scrape suspended solids on the water surface of the electric flocculation area into the slag collecting tank, and an electrode plate is arranged in the electric flocculation area; the settling zone is located below the electric flocculation zone, the bottom of the electric flocculation zone is of a hollow structure, and sewage in the electric flocculation zone flows into the settling zone from top to bottom; a water outlet pipe is arranged on the clear water area. The device treats sewage through multiple times of flocculation and air floatation, the sewage treatment effect is good, the space utilization rate of the device is high, and the sewage treatment efficiency is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to sewage treatment equipment technical field especially relates to a kind of electrocoagulation air floatation device. BACKGROUND

[0002] Electrocoagulation air floatation technology is under the action of external voltage, using aluminum or iron to generate high-activity multi-form polyaluminum or polyiron flocculants in situ at anode, and the polyaluminum or polyiron flocculants can make colloidal pollutants flocculate. At the same time, a large number of tiny hydrogen bubbles are released from the cathode under the action of voltage, and the hydrogen bubbles can make the flocs float up during the floating process. The reactor simultaneously undergoes the processes of electrocoagulation, electroflotation and electrooxidation. The dissolved colloids and suspended pollutants in water can be effectively converted and removed under the action of coagulation, flotation and oxidation. Electrocoagulation air floatation technology can effectively remove suspended solids, organic matter, heavy metals and other pollutants in water, and has the advantages of high treatment efficiency, no need to add chemical reagents, and less sludge production, etc. It is widely used in the fields of sewage treatment and wastewater treatment.

[0003] Patent CN214611953U discloses an electrocoagulation air floatation integrated machine, which includes an electrocoagulation zone, an air floatation separation zone, a dregs tank, a clean water tank, a dissolved gas system arrangement area, an outer frame, a dregs scraping device and a power supply control cabinet. The electrocoagulation air floatation integrated machine has the functions of electrocoagulation, electroflotation and enhanced flotation, and has good sewage treatment effect. However, in this method, the suspended solids in the sewage are completely removed by electrocoagulation, which is low in efficiency and high in cost. To solve this problem, patent CN213265857U discloses an electrocoagulation air floatation machine. The electrode system in the reactor first performs electrocoagulation and sedimentation treatment on the sewage, and then further promotes the flocculation of pollutants by adding a flocculating agent, thereby reducing the operating cost and improving the treatment effect. However, in this method, electrocoagulation is performed first, followed by chemical flocculation, and the amount of flocculating agent added is difficult to control. Moreover, the loss of electrocoagulation is also large. To solve this problem, patent CN116589060A discloses an electrocoagulation air floatation and sedimentation integrated device. In this device, the sewage is first subjected to chemical flocculation in a dosing area, and then subjected to electrocoagulation treatment in an electrocoagulation air floatation area. Moreover, a releaser is arranged in the electrocoagulation air floatation area to enhance flotation, thereby ensuring the sewage treatment effect. However, in this device, the dosing area, the releaser and the electrocoagulation air floatation area are arranged compactly, which requires a large space for subsequent dregs scraping and sedimentation treatment of the suspended solids. Moreover, an inclined pipe needs to be installed to accelerate the sedimentation of the suspended solids, which results in a small effective treatment space (chemical flocculation and electrocoagulation space) and low space utilization rate, and low sewage treatment efficiency. Moreover, the electrocoagulation process itself has a certain electroflotation effect, and the releaser is placed in the electrocoagulation air floatation area, which has little effect on the enhancement of the air flotation in the electrocoagulation air floatation area. SUMMARY

[0004] The utility model provides a kind of electroflocculation air floatation device, dosing area, release area, electroflocculation area, sedimentation area and clear water area are provided in the device, sewage is treated by multiple flocculation and air floatation, sewage treatment effect is good, and device space utilization is high, and sewage treatment efficiency is high.

[0005] The technical scheme for achieving the above-mentioned purposes of the utility model is as follows:

[0006] A kind of electroflocculation air floatation device, at least including pool body, dosing area, release area, electroflocculation area, sedimentation area and clear water area are sequentially connected in the pool body, water inlet pipe and dosing port are provided on dosing area, the bottom of release area is arranged with release device for generating bubble, release area and electroflocculation area are separated by overflow plate, and the sewage overflow of release area enters electroflocculation area;Slag collecting groove is provided at the rear of electroflocculation area, and slag scraping mechanism is provided above electroflocculation area, and the slag scraping plate on slag scraping mechanism extends into the water surface of electroflocculation area, and the suspended solids on the water surface of electroflocculation area are scraped into slag collecting groove, and electrode plate is arranged in electroflocculation area;Sedimentation area is located below electroflocculation area, and the bottom of electroflocculation area is in openwork structure, and the sewage of electroflocculation area flows into sedimentation area from top to bottom;Water outlet pipe is provided on clear water area.

[0007] The bottom of the dosing area is provided with a water inlet pipe connected to the outside, and the dosing area is provided with a dosing port and a stirring mechanism.

[0008] The dosing area is divided into a first dosing area and a second dosing area in communication by a first vertical partition, and the first dosing area and the second dosing area are each provided with a dosing port and a stirring mechanism.

[0009] The top of the overflow plate is inclined towards the electroflocculation area.

[0010] The electroflocculation area is divided into a first electroflocculation area and a second electroflocculation area in communication by a second vertical partition, and electrode plates are arranged in the first electroflocculation area and the second electroflocculation area.

[0011] The electroflocculation area and the slag collecting groove are separated by a third vertical partition, and a water baffle is fixed to the top of the side of the third vertical partition close to the electroflocculation area, the cross section of the water baffle is in "<" shape, and the "tip" of the water baffle faces the electroflocculation area, and when the slag scraping plate of the slag scraping mechanism passes through the water baffle, the bottom end of the slag scraping plate is below the "tip" of the water baffle.

[0012] The top of the side of the third vertical partition close to the slag collecting groove is fixed with an inclined plate arranged downward.

[0013] The upper part of the sedimentation area is provided with a water collecting pipe connected to the clear water area, and the bottom of the sedimentation area is provided with a sludge discharge port.

[0014] The clear water area is provided with a weir plate type adjustable weir to adjust the water level in the clear water area.

[0015] The clear water zone is communicated with a dissolved air system, the dissolved air system comprising a dissolved air pump and a dissolved air tank, the dissolved air pump being connected with the clear water zone and the dissolved air tank through a reflux pipe, and the dissolved air tank being connected with a releaser.

[0016] Compared with the prior art, the electric flocculation air flotation device has the following advantages: 1. The electric flocculation air flotation device provided by the utility model is provided with a release area between the dosing area and the electric flocculation area, the suspended matter after chemical flocculation is lifted to the water surface under the action of the bubbles released by the releaser in the release area, and then overflows to the electric flocculation area and is scraped to the residue collecting groove by the residue scraping mechanism; the sewage after residue scraping is further flocculated and air floated in the electric flocculation area, and the sewage treatment effect is good.

[0017] 2. The dosing area and the electric flocculation area are both provided with two, and the sewage after chemical flocculation is treated by air flotation in the release area, so that the sewage treatment effect is good after multiple flocculation and multiple air flotation, the sedimentation area does not need to occupy a large space, the space in the pool body is fully utilized, and the sewage treatment efficiency is high.

[0018] 3. The whole pool body is of a cuboid structure, facilitating placement of the whole electric flocculation air flotation device. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a top view of the electric flocculation air flotation device provided by the utility model;

[0020] Figure 2 It is a front view of the electric flocculation air flotation device provided by the utility model;

[0021] Figure 3 It is a sectional view of the electric flocculation air flotation device provided by the utility model;

[0022] Figure 4 It is a side view of the electric flocculation air flotation device provided by the utility model;

[0023] In the drawing: 1-pool body, 2-dosing area, 201-first dosing area, 202-second dosing area, 3-release area, 4-electric flocculation area, 401-first electric flocculation area, 402-second electric flocculation area, 5-sedimentation area, 6-clear water zone, 7-inlet pipe, 8-stirring mechanism, 9-first vertical partition, 10-releaser, 11-water distribution pipe, 12-overflow plate, 13-residue scraping mechanism, 1301-residue scraping plate, 14-residue collecting groove, 15-electrode plate, 16-second vertical partition, 17-third vertical partition, 18-supporting strip, 19-inclined plate, 20-residue discharge port, 21-water collecting pipe, 22-outlet pipe, 23-weir plate type adjustable weir, 24-dissolved air pump, 25-dissolved air tank, 26- reflux pipe, 27-emptying pipe. DETAILED DESCRIPTION

[0024] The utility model will be explained in detail below with reference to the drawings.

[0025] The electric flocculation air floatation device provided by the embodiment comprises a pool body 1, and specifically, the pool body is a cuboid structure, facilitating placement of the entire electric flocculation air floatation device. Figures 1-4 The pool body is internally provided with a dosing zone 2, a release zone 3, an electric flocculation zone 4, a sedimentation zone 5 and a clear water zone 6 connected in sequence, and sewage is sequentially subjected to the dosing zone, the release zone, the electric flocculation zone, the sedimentation zone and the clear water zone during sewage treatment.

[0026] The bottom of the dosing zone is provided with a water inlet pipe 7 connected to the outside, through which sewage enters the dosing zone, and the dosing zone is provided with a dosing opening (not shown in the drawing) and a stirring mechanism 8, through which flocculants are added, and the stirring mechanism stirs to rapidly flocculate suspended solids in the sewage. In the embodiment, the dosing zone is divided into a first dosing zone 201 and a second dosing zone 202 by a first vertical partition 9, the first dosing zone and the second dosing zone are connected, the water inlet pipe is located at the bottom of the first dosing zone, the sewage first enters the first dosing zone and then enters the second dosing zone, and the first dosing zone and the second dosing zone are both provided with a dosing opening and a stirring mechanism, flocculants are added into the sewage in batches through the two dosing openings, the treatment time and frequency of the sewage in the limited space are simultaneously extended, and the treatment effect is improved.

[0027] The sewage treated by chemical flocculation enters the release zone, and the bottom of the release zone is arranged with a releaser 10. Specifically, the bottom of the second dosing zone is provided with a water distribution pipe 11 connected to the second dosing zone and the release zone, so that the sewage in the second dosing zone is dispersed into the release zone. Preferably, the water distribution pipe in the release zone is in a T-shaped structure. The releaser generates tiny bubbles to lift suspended solids in the sewage to the water surface, improving the separation efficiency of the suspended solids after chemical flocculation.

[0028] The release area and the electrocoagulation area are separated by the overflow plate 12, and specifically, the top of the overflow plate is inclined towards the electrocoagulation area. The treated sewage in the release area overflows into the electrocoagulation area, ensuring that the suspended matter floating on the water surface enters the electrocoagulation area first and is quickly scraped away by the slag scraping mechanism 13 on the electrocoagulation area. A slag collecting tank 14 is arranged at the rear of the electrocoagulation area. It should be noted that the slag collecting tank is located below the slag scraping mechanism, ensuring that the suspended matter can be scraped into the slag collecting tank. At the same time, the height of the slag collecting tank is higher than the height of the water surface in the electrocoagulation area, ensuring that the sewage does not enter the slag collecting tank. A slag scraping mechanism is arranged above the electrocoagulation area, and the slag scraping plate 1301 on the slag scraping mechanism extends into the water surface of the electrocoagulation area, scraping the suspended matter on the water surface of the electrocoagulation area into the slag collecting tank, thereby removing the suspended matter in the sewage. Electrode plates 15 are arranged in the electrocoagulation area, and the electrode plates are connected to an external electric control system (not shown in the figure). When the electrode plates work, the sewage is coagulated and treated, further removing the suspended matter in the sewage. At the same time, nanoscale bubbles are generated on the electrode plates, further lifting the suspended matter in the water to the surface of the tank. The slag scraping mechanism scrapes the suspended matter generated in the electrocoagulation area and floating on the surface into the slag collecting tank for collection and treatment. Preferably, the electrocoagulation area is divided into a first electrocoagulation area 401 and a second electrocoagulation area 402 in communication by a second vertical partition plate 16. The first electrocoagulation area and the second electrocoagulation area are both arranged with electrode plates. The sewage is first treated in the first electrocoagulation area and then treated in the second electrocoagulation area, thereby performing multiple coagulation and air flotation processes on the sewage, ensuring the removal of suspended matter in the sewage and reducing the sedimentation time and space in the later stage.

[0029] Specifically, the electrocoagulation area and the slag collecting tank are separated by a third vertical partition plate 17. The top of the side close to the electrocoagulation area of the third vertical partition plate is fixed with a support strip 18. The cross section of the support strip is in the shape of “<”, and the “tip” of the support strip faces the electrocoagulation area. When the slag scraping plate on the slag scraping mechanism passes through the support strip, the bottom end of the slag scraping plate is located below the “tip” of the support strip. At this time, the slag scraping plate continues to move, and under the support of the support strip, the slag scraping plate is inclined backward and abuts against the support strip to scrape the suspended matter to the top of the third vertical partition plate. The suspended matter falls into the slag collecting tank, and part of the water in the suspended matter flows back to the electrocoagulation area along the inclined surface of the support strip. Specifically, the top of the side close to the slag collecting tank of the third vertical partition plate is fixed with an inclined plate 19 arranged downward. The suspended matter scraped to the top of the third vertical partition plate enters the slag collecting tank through the inclined plate. A slag discharge port 20 is arranged on the slag collecting tank to discharge the separated suspended matter at regular time.

[0030] The sedimentation area is located below the electrocoagulation area. The bottom of the electrocoagulation area is in a hollow structure. The treated sewage in the electrocoagulation area flows from top to bottom into the sedimentation area for sedimentation treatment. The upper part of the sedimentation area is provided with a water collecting pipe 21 communicating with the clear water area. The bottom of the sedimentation area is provided with a sludge discharge port (not shown in the figure). The supernatant after sedimentation enters the clear water area through the water collecting pipe, and the sludge after sedimentation is discharged through the sludge discharge port.

[0031] The top of the clear water zone is provided with a water outlet pipe 22, and the supernatant entering the clear water zone is discharged through the water outlet pipe. In the embodiment, a weir plate type adjustable weir 23 is arranged on the clear water zone to adjust the water level in the clear water zone.

[0032] In the embodiment, the clear water zone is also connected with a dissolved air system, which comprises a dissolved air pump 24 and a dissolved air tank 25. The dissolved air pump is connected with the clear water zone and the dissolved air tank through a reflux pipe 26 to pump the clear water in the clear water zone into the dissolved air tank. The dissolved air tank is connected with a releaser to release the generated dissolved air water to the bottom of the release zone, so as to generate micro bubbles in the release zone. Specifically, the dissolved air system is installed on the side of the pool body.

[0033] The working principle of the electric flocculation air flotation device provided in the embodiment is as follows: the sewage enters the first dosing zone through the water inlet pipe, flocculants are added in the first dosing zone and stirred, so that the suspended solids in the sewage are rapidly flocculated. The sewage subjected to the first chemical flocculation flows into the second dosing zone, flocculants are added in the second dosing zone and stirred, so that the suspended solids in the sewage are further flocculated. The sewage subjected to the secondary flocculation flows into the bottom of the release zone through the water distribution pipe. The releaser generates micro bubbles to lift the suspended solids in the sewage to the water surface. The suspended solids lifted to the water surface flow into the electric flocculation zone together with the treated sewage. The suspended solids on the water surface of the electric flocculation zone are scraped into the residue collection tank by the residue scraping plate arranged above the electric flocculation zone. At the same time, the electrode plate of the electric flocculation zone works to further flocculate and air float the sewage, so that the suspended solids in the sewage are further flocculated and scraped into the residue collection tank by the residue scraping plate. The water subjected to the electric flocculation treatment flows into the sedimentation zone from top to bottom, and is subjected to sedimentation treatment in the sedimentation zone. The supernatant in the sedimentation zone enters the clear water zone and is discharged through the water outlet pipe.

Claims

1. An electrocoagulation flotation device, comprising at least a tank body, characterized in that: The tank body is provided with a dosing area, a release area, an electric flocculation area, a sedimentation area and a clear water area which are connected in sequence. The dosing area is provided with a water inlet pipe and a dosing port. A releaser for generating bubbles is arranged at the bottom of the release area. The release area and the electric flocculation area are separated by an overflow plate. The sewage in the release area overflows into the electric flocculation area. A slag collecting tank is provided at the rear of the electric flocculation area. A slag scraping mechanism is provided above the electric flocculation area. The scraping plate on the slag scraping mechanism extends into the water surface of the electric flocculation area to scrape suspended matter on the water surface of the electric flocculation area into the slag collecting tank. The electric flocculation area is provided with an electrode plate. The sedimentation area is located below the electric flocculation area. The bottom of the electric flocculation area is a hollow structure. The sewage in the electric flocculation area flows from top to bottom into the sedimentation area. The clear water area is provided with a water outlet pipe.

2. The electrocoagulation flotation device according to claim 1, characterized in that: The bottom of the dosing area is provided with a water inlet pipe connected to the outside world, and the dosing area is provided with a dosing port and a stirring mechanism.

3. The electro-flocculation flotation device according to claim 2, characterized in that: The dosing area is divided into a first dosing area and a second dosing area which are connected to each other by a first vertical partition plate. Both the first dosing area and the second dosing area are provided with a dosing port and a stirring mechanism.

4. The electro-flocculation flotation device according to claim 1, characterized in that: The top of the overflow plate is inclined toward the electric flocculation zone.

5. The electro-flocculation flotation device according to claim 1, characterized in that: The electric flocculation zone is divided into a first electric flocculation zone and a second electric flocculation zone which are connected to each other by a second vertical partition plate. Electrode plates are arranged in both the first electric flocculation zone and the second electric flocculation zone.

6. The electro-flocculation flotation device according to claim 1, characterized in that: The electric flocculation zone and the slag collecting tank are separated by a third vertical partition. A water retaining bar is fixed to the top of the third vertical partition close to the electric flocculation zone. The cross-section of the water retaining bar is "<"-shaped, and the "tip" of the water retaining bar is facing the electric flocculation zone. When the scraping plate on the scraping mechanism passes through the water retaining bar, the bottom end of the scraping plate is located below the "tip" of the water retaining bar.

7. The electro-flocculation flotation device according to claim 6, characterized in that: A downwardly disposed inclined plate is fixed on the top of the third vertical partition plate on the side close to the slag collecting trough.

8. The electro-flocculation flotation device according to claim 1, characterized in that: A water collecting pipe communicating with the clean water area is provided on the upper part of the sedimentation area, and a mud discharge port is provided at the bottom of the sedimentation area.

9. The electro-flocculation flotation device according to claim 1, characterized in that: The clean water area is provided with a weir plate type adjustable weir to adjust the water level in the clean water area.

10. The electro-flocculation flotation device according to claim 1, characterized in that: The clean water area is connected with a dissolved air system, which includes an air dissolved pump and an air dissolved tank. The air dissolved pump is connected to the clean water area and the air dissolved tank through a reflux pipe, and the air dissolved tank is connected to the releaser.

Images