CN105540755B - A kind of half immersion algae-removing device that can generate flocculant - Google Patents

Abstract

A semi-submerged algae removal device capable of generating flocculants belongs to the technical field of water treatment. It solves the problem that the existing algae removal device for generating the flocculant needs to consume electric energy, and its high cost limits its application. It includes two anode plates, air cathode, two cathode and anode spacers, one cathode spacer and a floating block; the air cathode is a box with an upper opening structure; the cathode spacer is a mesh structure; the cathode spacer is vertical Set in the air cathode, there is a gap between the bottom of the cathode spacer and the bottom surface of the air cathode, forming a U-shaped air cavity, and two anode plates are symmetrically arranged on both sides of the air cathode, between each anode plate and the air cathode A channel is formed, and a cathode and anode spacer is vertically arranged in each channel, and a load is connected in series between the side wall of the air cathode and the anode plate adjacent to it, and the floating block is fixed on the outer wall of the air cathode, and is located above the channel near the opening of the air cathode. It is suitable for the wastewater treatment process with flocculation treatment.

Description

A semi-submerged algae removal device capable of generating flocculants

technical field

The invention belongs to the technical field of water treatment.

Background technique

Water blooms and red tides caused by eutrophication seriously threaten people's drinking water safety and breeding safety. A large number of algae breeds, which reduces the transparency of the water, affects the water quality of the water body, hinders the photosynthesis of plants, and consumes a large amount of dissolved oxygen in the water, resulting in the death and decay of a large number of aquatic animals and plants. Many algae can produce odor and toxic substances, which seriously endanger human and biological health. The hazards of algae outbreaks are mainly manifested in the following three aspects: 1. For aquaculture: the existence of algae in eutrophic water bodies will cause poisonous and lethal effects on fish, shellfish, poultry, wild animals, etc. 2 Destruction of landscape water bodies: Due to the slow water exchange process of landscape water bodies, algae can reproduce rapidly and in large areas. These algae attach to the water surface and shore, and emit an unpleasant smell due to their growth or decomposition, which seriously affects the water sense. 3 Impact on the water purification process: Interfering with the treatment effect of the water purification process and increasing the cost of water purification. The algae and their extracellular secretions in the water body seriously interfere with the coagulation effect, which increases the dosage of flocculant, and the sedimentation and separation effect is not ideal. Algae cells can also penetrate the filter tank and pollute the effluent water quality. In addition, algae cells are easy to breed in the filter bed and block the filter bed. The traditional algae removal process mainly carries out algae removal in multiple links such as pretreatment, enhanced coagulation, air flotation and bioremediation. At present, algae removal methods mainly include physical methods, chemical methods and biological methods. These methods all have certain limitations.

In recent years, electrocoagulation algae removal technology has received more and more attention, but its application is limited due to the high cost of power consumption.

Contents of the invention

The purpose of the invention is to solve the problem that the existing algae removal device for generating flocculant needs to consume electric energy, and its high cost limits its application. The invention provides a semi-submerged algae removal device capable of generating flocculant.

A semi-submerged algae removal device capable of generating flocculants, which includes two anode plates, an air cathode, two cathode and anode spacers, one cathode spacer and a floating block;

The air cathode is a box with an upper opening structure; the cathode spacer is a mesh structure;

The cathode spacer is vertically arranged in the air cathode, and there is a gap between the bottom of the cathode spacer and the bottom surface of the air cathode to form a U-shaped air cavity.

Two anode plates are arranged symmetrically on both sides of the air cathode, and a channel is formed between each anode plate and the air cathode,

A cathode and anode spacer is vertically arranged in each channel,

A load is connected in series between the side wall of the air cathode and its adjacent anode plate,

The floating block is fixed on the outer wall of the air cathode, and is located above the passage near the opening of the air cathode.

The anode plate is arranged parallel to the air cathode.

The semi-submerged algae removal device that can generate flocculants is used to fix two anode plates, air cathode, two cathode and anode spacers and one cathode spacer by clamping, binding or bolting. fixed.

The cathode spacer is realized by insulating material.

The anode plate is iron mesh, iron plate, aluminum mesh, aluminum plate or iron-aluminum composite plate.

The cathode and anode separators are of mesh structure.

The beneficial effect that the present invention brings is,

The present invention has a unique approach. The device of the present invention does not need to consume electric energy during the application process. At the same time, the present invention is also an algae removal device that simultaneously generates electric energy and flocculant. Compared with the traditional algae removal technology, this technology can generate in situ High coagulant can avoid the secondary pollution caused by adding chemical coagulant, and can also save the cost of storage, mixing and transportation required for coagulant. The device has a series of advantages such as low cost, simple equipment, high degree of integration, and less land occupation. It is suitable for other wastewater treatment processes that can be treated with flocculation technology.

The device of the invention can be precisely controlled, can control the flocculant generation and stop by controlling the on-off of the load, and at the same time can adjust the negative-anode reaction rate by adjusting the load size, control the flocculant generation rate, and thereby control the algae removal rate. After the water body is treated, the cathode and anode are disconnected from the load to terminate the floc formation reaction and save costs.

The device can be connected to a water quality sensor, driven by the electric energy generated by itself, automatically runs when the water body deteriorates, and stops after the water body is purified.

The electric energy generated by the device of the present invention can drive the device to cruise in water, and after the treatment of one area is completed, the device can be driven to continue purifying other polluted water bodies.

The device of the present invention is different from the traditional electrocoagulation device, which needs to consume electric energy, has high operation cost and is not convenient for field operation. The device generates electric energy spontaneously, has low operation cost and can be operated in the field.

The device of the invention is simple in structure, easy to assemble, easy to operate, and can operate automatically without supervision.

Description of drawings

Fig. 1 is a schematic structural view of a semi-submerged algae removal device capable of generating flocculants according to the present invention.

Detailed ways

Specific Embodiment 1: Refer to Fig. 1 to illustrate this embodiment, a semi-submerged algae removal device capable of generating flocculants described in this embodiment, which includes two anode plates 1, an air cathode 2, and two cathode and anode intervals Plate 3, a cathode spacer plate 4 and a floating block 5;

The air cathode 2 is a box with an upper opening structure; the cathode spacer 4 is a mesh structure;

The cathode spacer 4 is vertically arranged in the air cathode 2, and there is a gap between the bottom of the cathode spacer 4 and the bottom surface of the air cathode 2 to form a U-shaped air cavity 6,

Two anode plates 1 are arranged symmetrically on both sides of the air cathode 2, and a channel 7 is formed between each anode plate 1 and the air cathode 2,

A cathode and anode partition plate 3 is vertically arranged in each channel 7,

A load 8 is connected in series between the side wall of the air cathode 2 and the adjacent anode plate 1,

The floating block 5 is fixed on the outer wall of the air cathode 2 and is located above the channel 7 close to the opening of the air cathode 2 .

In this embodiment, when the semi-submerged algae removal device for generating flocculant according to the present invention is in operation, it is placed in a water body, the part below the floating block 5 is submerged in the water body, and the part above the floating block is exposed to the air.

When the algae removal device is in operation, the anode plate 1 and the air cathode 2 are both immersed in the solution. The solution has a certain electrical conductivity. A primary battery reaction occurs between the cathode and the anode to generate electricity, which can be recycled and used by different loads. The load can be a light bulb, Resistors, energy storage devices, etc. The recovered electricity can be used for landscaping or to drive the unit for cruising. The cathode and anode are connected to the load through wires, and the load can be adjusted in size.

The air cathode and the cathode spacer 4 form a U-shaped air cavity 6, the upper end of which is open to the air and the lower end is sealed.

The air cathodes are separated by mesh cathode spacers 4 to form an air cavity, which prevents the cathodes from sticking together and facilitates the diffusion of oxygen.

Between the anode plate 1 and the air cathode 2, a cathode and anode spacer plate 3 is provided to prevent the cathode and anode from contacting each other and short circuit.

Specific embodiment 2: Referring to Fig. 1 to illustrate this embodiment, the difference between this embodiment and the semi-submerged algae removal device capable of generating flocculant described in Embodiment 1 is that the anode plate 1 and the air cathode 2 parallel settings.

Embodiment 3: The difference between this embodiment and the semi-submerged algae removal device capable of generating flocculants described in Embodiment 1 is that the algae removal device is fixed by clamping, binding or bolting. Fix two anode plates 1, air cathode 2, two cathode and anode spacers 3 and one cathode spacer 4.

Embodiment 4: The difference between this embodiment and the semi-submerged algae removal device capable of generating flocculant described in Embodiment 1 is that the cathode spacer 4 is realized by insulating material.

In this embodiment, the cathode spacer 4 is made of insulating and corrosion-resistant materials such as plastic and polytetrafluoroethylene. The cathode spacer 4 prevents the cathodes from sticking together, and the cathode spacer 4 has a mesh structure to facilitate oxygen diffusion.

Embodiment 5: The difference between this embodiment and the semi-submerged algae removal device capable of generating flocculants described in Embodiment 1 is that the anode plate 1 is iron mesh, iron plate, aluminum mesh, aluminum plate Or iron-aluminum composite panels.

In this embodiment,

(1) When the anode plate 1 is an anode of iron material, the electrode reactions that the iron anode material takes place are respectively:

The reaction at the cathode is: O ₂ +H ⁺ +e ^- →H ₂ O

The reaction at the anode is: Fe+H ₂ O→Fe(OH) ₂ +H ⁺ +e ^-

The Fe(OH) ₂ flocculant released from the anode is released into the solution, and the algae in the water body are captured to form flocs, which are finally separated and removed by sedimentation.

Part of Fe(OH) ₂ is oxidized by oxygen to generate Fe(OH) ₃ flocculant, forming a composite flocculant to improve the removal effect of algae.

The air cathode catalytic layer will release a small amount of H ₂ O ₂ in the water body, and generate hydroxyl radicals with Fe ²⁺ and O ₂ in the solution, which has a certain killing effect on algae and improves the removal effect.

(2) When the anode plate 1 is the anode of the aluminum material, the electrode reactions that the anode of the aluminum material takes place are respectively:

The reaction at the cathode is: O ₂ +H ⁺ +e ^- →H ₂ O

The reaction at the anode is: Al+H ₂ O→Al(OH) ₃ +H ⁺ +e ^-

The Al(OH) ₃ flocculant released from the anode is released into the solution, and the algae in the water body are captured to form flocs, which are finally separated and removed by sedimentation.

(3) When the anode plate 1 is an iron-aluminum composite material:

The reaction at the cathode is: O ₂ +H ⁺ +e ^- →H ₂ O

The reaction at the anode is: Fe+Al+H ₂ O→Fe(OH) ₂ +Al(OH) ₃ +H ⁺ +e ^-

The Al(OH) ₃ and Fe(OH) ₂ flocculants released from the anode are released into the solution, and part of the Fe(OH) ₂ is oxidized by oxygen to generate Fe(OH) ₃ flocculants, forming a composite flocculant to capture algae formation in the water body The flocs are finally separated and removed by sedimentation, so as to advance the removal effect of algae.

Embodiment 6: The difference between this embodiment and the semi-submerged algae removal device capable of generating flocculant described in Embodiment 1 is that the anode-cathode separator 3 is a mesh structure.

In this embodiment, a cathode-anode partition plate 3 is provided between the anode plate 1 and the air cathode 2, which not only prevents the cathode and anode from contacting each other, prevents short circuit, but also increases the circulation of the liquid.

Aiming at the eutrophication pollution of fresh water or sea water, the present invention proposes a device that utilizes the oxidation-reduction reaction of the anode and anode to generate electric energy, and at the same time, the anode is oxidized to generate a flocculant to coagulate and remove algae from precipitation. The present invention is different from the traditional electric flocculation technology. The present invention does not consume electric energy, but generates electric energy at the same time, and can recycle electric energy for use by other equipment or for this device in situ. The invention is mainly applied to algae removal and purification in fresh water drinking water plants, and can also be applied to algae removal in eutrophic lakes or landscape water bodies, as well as algae removal in mariculture and ocean landscapes.

Claims (6)

1. a kind of half immersion algae-removing device that can generate flocculant, it is characterised in that it includes two pieces of positive plates (1), sky Gas cathode (2), 2 anode and cathode spacing boards (3), 1 cathode separation plate (4) and floating block (5)；

The air cathode (2) is the babinet with upper shed structure；Cathode separation plate (4) is net structure；

Cathode separation plate (4) is vertically arranged in air cathode (2), the bottom of cathode separation plate (4) and the bottom of air cathode (2) Gap is left between face, forms U-shaped air chamber (6),

Two pieces of positive plates (1) are symmetricly set on the both sides of air cathode (2), between every piece of positive plate (1) and air cathode (2) A passage (7) is formed,

An anode and cathode spacing board (3) is vertically arranged in each passage (7),

Connect between the side wall and positive plate adjacent thereto (1) of air cathode (2) one and load (8),

Floating block (5) is fixed on the lateral wall of air cathode (2), and close to the opening of air cathode (2) above passage (7) Place.

2. a kind of half immersion algae-removing device that can generate flocculant according to claim 1, it is characterised in that described Positive plate (1) be arranged in parallel with air cathode (2).

3. a kind of half immersion algae-removing device that can generate flocculant according to claim 1, it is characterised in that this is removed By way of algae device is gripping, bundled fixed or bolt are fixed by two pieces of positive plates (1), air cathode (2), 2 Anode and cathode spacing board (3) and 1 cathode separation plate (4) are fixed.

4. a kind of half immersion algae-removing device that can generate flocculant according to claim 1, it is characterised in that described Cathode separation plate (4) using isolation material realize.

5. a kind of half immersion algae-removing device that can generate flocculant according to claim 1, it is characterised in that described Positive plate (1) be iron net, iron plate, aluminium net, aluminium sheet or iron aluminium hard board.

A kind of 6. half immersion algae-removing device that can generate flocculant according to claim 1, it is characterised in that negative and positive Interpolar partition plate (3) is net structure.