CN219449384U

CN219449384U - Novel electrochemical air floatation machine

Info

Publication number: CN219449384U
Application number: CN202320772795.2U
Authority: CN
Inventors: 程亚莲; 程建德
Original assignee: Jiangsu Younuo Environmental Protection Technology Co ltd
Current assignee: Jiangsu Younuo Environmental Protection Technology Co ltd
Priority date: 2023-04-10
Filing date: 2023-04-10
Publication date: 2023-08-01
Anticipated expiration: 2033-04-10

Abstract

The utility model belongs to the technical field of wastewater treatment equipment, and particularly relates to a novel electrochemical air flotation machine, which comprises an equipment main body, wherein the inner part of the air flotation machine is divided into an aeration zone, a main reaction zone, a slag collecting zone and a clear water zone, wastewater is fully mixed with microbubbles through the aeration equipment of the aeration zone and then enters the main reaction zone, a mud scraper is arranged at the upper part of the main reaction zone to collect generated scum into the slag collecting zone, an electrode plate is arranged in the main reaction zone, wastewater is discharged after being subjected to air flotation and electrode reaction through a water pipe and then enters the clear water zone, and a mud discharging valve is additionally arranged in the main reaction zone to prevent part of sludge deposition.

Description

Novel electrochemical air floatation machine

Technical Field

The utility model belongs to the technical field of wastewater treatment equipment, and particularly relates to a novel electrochemical air flotation machine.

Background

With the rapid development of world economy, water pollution becomes a hotspot problem gradually. In China, the treatment of industrial wastewater is an urgent problem to be solved. The common sewage and wastewater treatment methods mainly comprise a physical method, a chemical method and a biological method, wherein the physical method is mainly used for removing pollutants by gravity precipitation or mechanical filtration and the like; biological methods degrade contaminants by the effective flora in activated sludge; the chemical method is to remove pollutants by adding chemical reagents to generate chemical reaction.

The different treatment methods have the advantages that most of the conventional physical methods are used for pretreatment of sewage and wastewater, the emission standard cannot be met, and the physical methods with advanced treatment capability, such as ultrafiltration, reverse osmosis and other membrane methods, need to perform certain pretreatment on the inlet water, and have extremely high manufacturing cost and operation cost. Although the biological method has low operation cost, the biological method can achieve a certain effect only by pre-treating the organic wastewater which is difficult to degrade in the actual operation process, so that the biodegradability of the wastewater is improved.

The air floatation method is characterized in that highly dispersed micro bubbles are formed in water, solid or liquid particles of hydrophobic groups in wastewater are adhered to form a water-air-particle three-phase mixed system, after the particles are adhered to the bubbles, floccules with apparent density smaller than that of water are formed to float to the water surface, and a floating slag layer is formed to be scraped off, so that the process of separating the solid from the liquid or the liquid from the liquid is realized. The air floatation method has high treatment rate for suspended pollutants due to simple operation, and is widely applied. However, in practical application, the air floatation only has the function of removing suspended pollutants in the wastewater, but can not effectively remove the refractory organic pollutants facing the dissolubility, and the degradation or mineralization of the refractory organic matters still needs to be realized in the subsequent modes of oxidation and the like.

Disclosure of Invention

The utility model aims to: the novel electrochemical air floatation machine is simple in structure, easy to operate and manage and capable of further degrading or mineralizing soluble organic pollutants on the basis of effectively removing suspended pollutants, so that the problems are solved.

The technical scheme is as follows: a novel electrochemical air floatation machine, which comprises an equipment main body; the equipment main body is internally and sequentially divided into an aeration zone, a main reaction zone, a slag collecting zone and a clear water zone;

an aerator is arranged at the top of the equipment main body, the aerator is coupled to the aeration zone, and a rotating shaft of the aerator is provided with an air dispersing impeller;

the top of the equipment main body is provided with a mud scraper which is positioned at the upper part of the main reaction zone, and the mud scraper collects the generated scum into a slag collecting zone; an electrode plate is arranged in the main reaction zone; a water passing pipe communicated with the clear water area is arranged in the main reaction area; meanwhile, a mud valve is additionally arranged in the main reaction zone.

In a further embodiment, a water inlet communicated with the aeration zone inside the equipment body is arranged on one side of the equipment body, and a water outlet communicated with the clear water zone inside the equipment body is arranged on the other side of the equipment body.

In a further embodiment, a slag discharging port communicated with the slag collecting area is arranged on the equipment main body;

and the equipment main body is provided with an emptying port communicated with the clear water area.

In a further embodiment, a sludge discharge port communicated with the sludge discharge valve is arranged at the top of the main reaction zone;

the main reaction zone is internally provided with an inclined plate in an inclined state, and the inclined plate is inclined to the sludge discharge port.

In a further embodiment, the anode and the cathode in the electrode plates are graphite plates, and the interval between the electrode plates is 5-25cm.

In a further embodiment, the electrode plates are supplied with electricity in a pulse mode (duty ratio is 0.6), and the current density is controlled to be 5-25mA/cm ² And when water is fed, the power is continuously electrified.

In a further embodiment, the wastewater enters the main reaction area after the microbubbles are fully mixed by the aerator and the air dispersing impeller in the aeration area, a mud scraper is arranged at the upper part of the main reaction area to collect the generated scum into the slag collecting area, meanwhile, an electrode plate is arranged in the main reaction area, the wastewater enters the clear water area through a water pipe after air floatation and electrode reaction and is discharged, and meanwhile, a mud discharging valve is additionally arranged in the main reaction area to prevent and treat part of sludge deposition. The device integrates the advantages of air floatation and electrochemical technology, and effectively complements the defects of the air floatation process.

Compared with the prior art, the utility model has the following beneficial effects:

1. the utility model integrates the advantages of electrochemistry and an air floatation process, removes suspended pollutants through air floatation, and realizes the complement of the two processes through electrochemical degradation of soluble organic pollutants.

2. The utility model adopts a pulse power supply mode, effectively relieves passivation of the electrode plate and improves the effect of electrochemically treating wastewater.

3. On the basis of maintaining the original air floatation equipment, the utility model only combines the electrochemical technology to complement the defects in the two, reduces the land and investment in the water treatment construction period, reduces the flow length of the water treatment process, and avoids the problems of poor process stability and the like caused by the flow process.

Drawings

FIG. 1 is a schematic structural view of a novel air floatation machine of the present utility model.

Reference numerals: the device comprises a device main body 1, a water inlet 2, a water outlet 3, a slag discharging port 4, a mud discharging port 5, an emptying port 6, a water passing pipe 7, an aeration zone 8, an aerator 9, a gas dispersing impeller 10, a mud scraper 11, a slag collecting zone 12, a clear water zone 13, an electrode plate 14 and a main reaction zone 15.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1, the utility model provides a novel electrochemical air floatation machine, which comprises a device main body 1; the inside of the equipment main body 1 is sequentially divided into an aeration zone 8, a main reaction zone 15, a slag collecting zone 12 and a clear water zone 13;

an aerator 9 is arranged at the top of the equipment main body 1, the aerator 9 is coupled to the aeration zone 8, and a rotating shaft of the aerator 9 is provided with a gas dispersing impeller 10;

the top of the equipment main body 1 is provided with a mud scraper 11 positioned at the upper part of the main reaction zone 15, and the mud scraper 11 collects generated scum into a slag collecting zone 12; an electrode plate 14 is arranged in the main reaction zone 15; a water passing pipe 7 communicated with the clear water zone 13 is arranged in the main reaction zone 15; while the main reaction zone 15 is additionally provided with a sludge discharge valve.

In one embodiment, as shown in fig. 1, one side of the device main body 1 is provided with a water inlet 2 communicated with an aeration zone 8 inside the device main body 1, and the other side is provided with a water outlet 3 communicated with a clear water zone 13 inside the device main body 1.

In one embodiment, as shown in fig. 1, the apparatus main body 1 is provided with a slag discharging port 4 communicated with the slag collecting region 12; the slag discharging port 4 discharges the scum in the slag collecting region 12;

the device main body 1 is provided with an emptying port 6 communicated with the clear water area 13, and the emptying port 6 empties water collected in the clear water area 13.

In one embodiment, as shown in fig. 1, the top of the main reaction zone 15 is provided with a sludge discharge port 5 communicating with the sludge discharge valve;

the inside of the main reaction zone 15 is provided with an inclined plate in an inclined state, and the inclined plate is inclined to the sludge discharge port 5.

In one embodiment, as shown in fig. 1, the anode and the cathode of the electrode plates 14 are graphite plates, and the interval between the electrode plates 14 is 5cm to 25cm.

In one embodiment, as shown in fig. 1, the electrode plate 14 is powered by pulse (duty ratio is 0.6), the current density is controlled to be 5-25mA/cm2, and the power is continuously supplied when water is fed.

Hereinafter, different embodiments of controlling the current density according to the sizes of the different spaced electrode plates 14 will be given;

example 1:

the anode and the cathode of the electrode plate 14 are graphite plates. The electrode plates 14 were spaced 5cm apart.

The electrode plate 14 is powered by pulse (duty ratio is 0.6), current density is controlled to be 5mA/cm < 2 >, and the power is continuously supplied when water is fed.

Example 2:

the anode and the cathode of the electrode plate 14 are graphite plates. The electrode plates 14 were spaced 10cm apart.

The electrode plate 14 is powered by pulse (duty ratio is 0.6), current density is controlled to be 10mA/cm < 2 >, and the power is continuously supplied when water is fed.

Example 3:

the anode and the cathode of the electrode plate 14 are graphite plates. The electrode plates 14 are spaced 25cm apart.

The electrode plate 14 is powered by pulse (duty ratio is 0.6), current density is controlled to be 25mA/cm < 2 >, and the power is continuously supplied when water is fed.

The embodiment is utilized to treat the organic wastewater difficult to degrade in the industrial park by the electrochemical sewage treatment device and the conventional air floatation device, and the water quality index of the inlet water and the outlet water is shown in the following table.

Project	Conventional air floatation machine	Example 1	Example two	Example III
					Inlet water (COD)	3500	3500	3500	3500
Effluent (COD)	1800	970	1072	890

The data show that compared with the traditional air flotation machine, the novel electrochemical air flotation machine has great improvement on the processing capacity.

Working principle: firstly, wastewater enters an aeration zone 8 through a water inlet 2, so that an aerator 9 works to drive an air dispersing impeller 10 to rotate in the aeration zone 8, the wastewater passes through the aerator 9 of the aeration zone 8 to drive the air dispersing impeller 10 to rotate, so that wastewater microbubbles are fully mixed and enter a main reaction zone 15, a mud scraper 11 at the upper part of the main reaction zone 15 collects generated scum into a slag collecting zone 12, meanwhile, an electrode plate 14 in the main reaction zone 15 works, the wastewater enters a clear water zone 13 through a water pipe 7 after being subjected to air floatation and electrode reaction, and is discharged through a water outlet 3, and meanwhile, the main reaction zone 15 is additionally provided with a mud discharging valve to prevent part of sludge from depositing.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the utility model.

Claims

1. The novel electrochemical air floatation machine is characterized by comprising an equipment main body; the equipment main body is internally and sequentially divided into an aeration zone, a main reaction zone, a slag collecting zone and a clear water zone;

2. The novel electrochemical air flotation machine according to claim 1, wherein one side of the equipment main body is provided with a water inlet communicated with an aeration zone inside the equipment main body, and the other side of the equipment main body is provided with a water outlet communicated with a clear water zone inside the equipment main body.

3. The novel electrochemical air flotation machine according to claim 1, wherein the device main body is provided with a slag discharging port communicated with the slag collecting area;

4. The novel electrochemical air flotation machine according to claim 1, wherein the top of the main reaction zone is provided with a sludge discharge port communicated with the sludge discharge valve;

5. The novel electrochemical air flotation machine according to claim 1, wherein the anode and the cathode in the electrode plates are graphite plates, and the interval between the electrode plates is 5-25cm.

6. The novel electrochemical air flotation machine according to claim 1, wherein the electrode plate adopts a pulse power supply mode, and the current density of the electrode plate is controlled to be 5-25mA/cm ² 。