CN111952695A

CN111952695A - Meta-aluminate/aluminum hydroxide preparation equipment

Info

Publication number: CN111952695A
Application number: CN202010860089.4A
Authority: CN
Inventors: 黄宗洪; 曾玉府; 陈寄喜; 谷波涛; 曹伟; 陈方红; 薛开建
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-08-20
Filing date: 2020-08-20
Publication date: 2020-11-17

Abstract

The invention discloses a preparation device of metaaluminate/aluminum hydroxide, which comprises a frame, a reactor, an aluminum cathode, electrolyte and a control system, wherein the reactor comprises: the reactor is composed of a plurality of reaction monomers in cascade connection, and each reaction monomer is composed of a main body, an air vent plate, an air positive electrode, a sealing ring, a lead-out pole piece and an aluminum negative electrode. The air vent plate, the air anode and the sealing rings are parallelly attached to and shielded at the left side and the right side of the main body to form a reaction cavity, the front side and the rear side of the main body of the lead-out pole piece are fixed and are connected with the air anode, the aluminum cathode is inserted and fixed in the reaction cavity, and the main body is provided with a circulating channel for electrolyte and air. The reactor is arranged in the frame, electrolyte enters the reaction cavity to react with the aluminum cathode to generate metaaluminate/aluminum hydroxide, electric energy is discharged at the same time, the aluminum cathode is continuously consumed, and the aluminum cathode is continuously transferred into the reaction cavity to form a continuous reaction discharge process and obtain the metaaluminate/aluminum hydroxide under the control of a motor on the frame.

Description

Meta-aluminate/aluminum hydroxide preparation equipment

Technical Field

The invention belongs to the preparation of meta-aluminate/aluminum hydroxide, and particularly relates to meta-aluminate/aluminum hydroxide preparation equipment.

Background

The existing methods for preparing metaaluminate/aluminum hydroxide comprise the following steps: bayer process, soda lime sintering process, bayer sintering combination, and the like;

the aluminum air battery has the advantages that:

1. the energy density is high. The aluminum air battery car consumes about 3kg of aluminum, 5L of water and electrolyte when the car is hundred kilometers, and the oil consumption of a common passenger car is about 8L/100 km; the endurance capacity is higher than that of the lithium ion battery, and the actual specific energy of the aluminum-air battery can reach 500-;

2. the aluminum has rich resources and reasonable price. The manufacturing cost of the aluminum-air battery is about 1000 yuan/kwh, which is 1/4 of the production cost of the lithium ion battery of 4000 yuan/kwh;

3. the preparation of aluminum has a mature industrial basis, and the capacity of the aluminum industry in China is surplus.

4. The product generated by the operation of the aluminum-air battery is mainly meta-aluminate/aluminum hydroxide which can be recycled and can be further processed into industrial products such as high-purity superfine aluminum hydroxide, high-purity superfine gamma-phase alumina, high-purity superfine alpha-phase alumina and the like.

Disadvantages of aluminum air cells:

1. the specific power is lower. The charging and discharging speed is slow, the voltage is lagged, and the self-discharging rate is large;

2. the side reaction of the electrode generates heat. A thermal management system is required to prevent overheating of the aluminum air cell during operation;

3. the reaction products are mainly meta-aluminate/aluminum hydroxide and metallic aluminum per se do not cause environmental pollution and have low toxicity, but aluminum ion Al³⁺Has biological enrichment property, is difficult to be discharged out of the body after entering the human body, and finally harms public health. Aluminum poisoning may manifest as symptoms of alzheimer's disease (senile dementia).

In contrast to hydrogen fuel cells:

1. aluminum air cells and hydrogen fuel cells are electrochemical cells, but have lower energy densities than hydrogen.

2. The reaction product of the aluminum-air battery is mainly meta-aluminate/aluminum hydroxide, can not be directly discharged and needs to be recycled, so that the recycling cost is increased compared with the condition that the reaction product of the hydrogen fuel vehicle can be directly discharged without harm;

3. the hydrogen fuel cell system is dangerous and has explosion hidden danger; the aluminum-air battery has good safety;

4. the user experience is poor. The electrolyte (liquid) of the aluminum-air battery generally adopts strong alkaline solutions of KOH, NaOH and the like, water and electrolyte are required to be supplemented besides the aluminum electrode, and compared with the direct fuel addition of fuel oil and hydrogen, the electrolyte (liquid) of the aluminum-air battery increases substances required to be added, and is more complicated.

China is not rich in bauxite resources, and the recovery and utilization rate of waste aluminum is low. If the waste aluminum can not be recycled, the waste aluminum is huge. Therefore, a whole set of preparation equipment for producing the metaaluminate/aluminum hydroxide slurry by using the waste aluminum is designed by utilizing the principle of the aluminum-air battery, and compared with the actual production result of a factory, the production efficiency of the aluminum-air battery is far higher than that of other production modes.

Disclosure of Invention

1. The preparation process using the principle of the aluminum-air battery comprises the following steps: the preparation process of the metaaluminate/aluminum hydroxide takes oxygen in the air as a positive active material and metal aluminum as a negative active material, and comprises the following steps: taking potassium hydroxide or sodium hydroxide solution as electrolyte, and carrying out electrochemical reaction under the catalysis of a positive electrode catalyst to generate electric energy and obtain metaaluminate/aluminum hydroxide slurry; (ii) neutral electrolyte: potassium chloride or sodium chloride solution is used as electrolyte, and the aluminum hydroxide slurry is obtained while electrochemical reaction is carried out under the catalysis of a positive electrode catalyst to generate electric energy.

2. Production equipment: including frame, reactor, aluminium negative pole, electrolyte and control system: the reactor is composed of a plurality of reaction monomers in cascade connection, and the reaction monomers are composed of a main body, an air vent plate, an air anode, a sealing ring, a lead-out pole piece and an aluminum cathode. The air vent plate, the air anode and the sealing rings are parallelly attached to and shielded at the left side and the right side of the main body to form a reaction cavity, the front side and the rear side of the main body of the lead-out pole piece are fixed and are connected with the air anode, the aluminum cathode is inserted and fixed in the reaction cavity, and the main body is provided with a circulating channel for electrolyte and air. The reactor is installed in the frame, produces electrochemical reaction through letting electrolyte get into the reaction chamber with the aluminium negative pole, and the aluminium negative pole constantly consumes, through control system to the motor control in the frame, constantly transfers the aluminium negative pole to the reaction intracavity and forms continuous reaction process.

Drawings

In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

FIG. 1 is a schematic diagram of the reaction monomers.

Fig. 2 is a schematic view of a portion of a housing.

Fig. 3 is a schematic view of the assembly.

The code numbers in FIG. 1 are: 1. the device comprises a main body, 2 a cathode, 3 a lead-out copper sheet, 4 a sealing ring, 5 an air anode, 6 a vent plate, 7 a connecting wire and 8 a contact switch.

100. Liquid outlet, 101 liquid inlet, 102 air inlet, 103 overflow outlet, 104 return channel, 105 cathode inlet

The code numbers in FIG. 2 are: 9. the device comprises a motor, 10 parts of a fixed seat, 11 parts of a moving seat, 12 parts of a negative pole fixing plate, 13 parts of a stand column, 14 parts of a baffle plate, 15 parts of a pull rod and 16 parts of an insulating block.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.

As shown in figure 1, the reaction monomer is a schematic diagram, and a reactor is composed of a main body 1, a negative electrode (2), a lead-out copper sheet (3), a sealing ring (4), an air positive electrode (5), a vent plate (6), a connecting wire (7) and a contact switch (8).

The ventilation plate (6) fixedly shields the air anode (5) and the sealing ring (4) on two sides of the main body (1) in sequence.

The lead-out copper sheets (3) are fixed at two ends of the main body (1) and are connected with two sides of the air anode (5).

The connecting wire (7) is fixedly connected with the lead-out copper sheet (3) and is fixedly connected with the cathode (2) of the next cascade-connected reaction monomer.

The main body 1 is provided with a liquid outlet 100, a liquid inlet 101, an air inlet 102, an overflow port 103, a backflow channel 104 and a negative electrode inlet 105.

The negative electrode (2) is inserted into the interior of the main body 1 through the negative electrode inlet 105, and the bottom of the main body 1 is provided with a contact switch (8) for detecting the position of the negative electrode (2) inside the main body.

When the device works, electrolyte enters the inside of the main body 1 from the liquid inlet 101, contacts with the negative electrode (2), gradually rises until the overflow port 103 flows out to the backflow channel 104, and then flows out from the liquid outlet 100. Meanwhile, air enters the aeration plates (6) at two sides of the main body 1 from the air inlet 102 and flows out from the peripheries of the aeration plates.

Fig. 2 is a schematic view of a part of a frame, which includes a motor 9, a fixed seat 10, a movable seat 11, a negative fixing plate 12, a column 13, a baffle 14, a pull rod 15, and an insulating block 16.

The motor 9 is fixed on the fixed seat 10, and the shaft inside the motor can move up and down and is connected with the moving seat 11.

The lower part of the motion seat 11 is connected with an insulating block 16.

The lower part of the insulating block 16 is connected with the negative pole fixing plate 12 and used for clamping and fixing the negative pole (2).

The fixed seat 10 is fixedly connected with four upright posts 13, and the moving seat 11 is assembled on the upright posts 13 and can slide. The motor 9 has its internal shaft connected to the motion base 11 and controls the moving manner, including speed and distance, of the motion base 11.

The baffle 14 at the lower part of the frame is used for clamping the cascaded reaction monomers and is fixed on the frame through a pull rod 15, and the baffle 14 is fixedly connected with the upright post 13. The baffle 14 has a liquid outlet 100, a liquid inlet 101, and a gas inlet 102 corresponding to the main body 1 for external connection.

The control system of the present invention is necessary for the operation of the plant and will not be described in detail herein.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.

Claims

1. An apparatus for preparing metaaluminate/aluminum hydroxide by an aluminum-air battery method, comprising: the electrolytic cell comprises a frame, a galvanic pile, an aluminum negative plate, electrolyte and a control system, wherein the galvanic pile is arranged on the frame, the electrolyte is pumped into the galvanic pile and flows with the outside in a circulating way, and the aluminum plate in the galvanic pile generates electrochemical reaction through the anode and the electrolyte to generate meta-aluminate (alkaline)/aluminum hydroxide (neutral) and generates electricity; the motor on the frame controls the aluminum negative plate with the wedge-shaped front end to continuously push towards the inside of the pile so as to complete the continuous discharge reaction process, and the metaaluminate/aluminum hydroxide slurry is obtained by filtering through the external circulation filter.

2. The apparatus according to claim 1, wherein the top of the frame is provided with a fixed base, the top of the fixed base is provided with a motor, the four corners of the frame are provided with columns connected with the fixed base, the columns are provided with moving bases, the moving bases are connected with screws inside the motor and can reciprocate on the columns through the movement of the motor, the lower part of the moving bases is provided with a plurality of insulating blocks, and the lower parts of the insulating blocks are provided with negative fixed bases one by one.

3. The apparatus for preparing metaaluminate/aluminum hydroxide by using the aluminum-air battery method according to claim 1, wherein the galvanic pile is installed by a plurality of single bodies in a cascade manner, baffles are arranged at two ends of the galvanic pile, and pull rods are arranged inside the galvanic pile for tightening and fixing the galvanic pile.

4. The apparatus of claim 3, wherein the unit comprises a main body, an air-permeable plate, an air anode, a sealing ring, a metal connecting plate and an aluminum cathode plate, wherein the air-permeable plate, the air anode and the sealing ring are attached and shielded in parallel on the left and right sides of the main body to form the reaction chamber, the metal connecting plate is fixed on the front and back sides of the main body and connected with the air anode, and the aluminum cathode plate with a wedge-shaped front end is inserted into the guide groove inside the reaction chamber.

5. The apparatus for preparing metaaluminate/aluminum hydroxide by using the aluminum-air battery method according to claim 3, wherein the bottom of each single unit is provided with a position monitoring switch for detecting the position of the aluminum negative plate with the wedge-shaped front end in the reaction cavity, and the feeding of the aluminum negative plate is controlled by a control system.

6. The apparatus for preparing metaaluminate/aluminum hydroxide by using the aluminum-air battery method according to claim 1, wherein the aluminum negative plate is fixed on a negative fixing seat of a frame and corresponds to an upper inlet of each single cell on the cell stack.

7. The apparatus for preparing metaaluminate/aluminum hydroxide by using the aluminum-air cell method according to claim 1, wherein the reactor is internally provided with channels through which electrolyte and air can circulate.

8. The apparatus for preparing metaaluminate/aluminum hydroxide by the aluminum-air battery method according to claim 1, wherein the electrolyte is potassium hydroxide or sodium hydroxide solution, and the reactant is metaaluminate; the neutral electrolyte is potassium chloride or sodium chloride solution, and the reactant is aluminum hydroxide.

9. The apparatus for preparing metaaluminate/aluminum hydroxide by using the aluminum-air battery method according to claim 4, wherein the aeration plate is provided with grooves which can be ventilated with air and are communicated with each other.