Efficient carbonization tower for purifying lithium carbonate

Abstract

The utility model provides an efficient carbonizer for purifying lithium carbonate, which comprises a carbonizer main body, the top of the carbonizer main body is provided with a feed port and a gas outlet, the bottom of the carbonizer main body is provided with a gas inlet and a discharge port, and the feed port at the top is provided with a feed nozzle and uniformly sprays lithium-containing slurry into the carbonizer main body. The gas outlet is externally connected with a micro-nano bubble generator and a supercharger, carbon dioxide is treated into nano-scale bubbles and then pressurized into the carbonization tower main body, and an ultrasonic generator is mounted in the carbonization tower main body and emits ultrasonic waves for improving the mass transfer rate during reaction. The solubility of the carbon dioxide is improved, the contact reaction area between the carbon dioxide and the lithium-containing slurry in the carbonization tower is increased, the utilization rate of the carbon dioxide is improved, and the production cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to lithium carbonate purification technology especially relates to a kind of high-efficiency carbonization tower for purifying lithium carbonate. BACKGROUND

[0002] Lithium carbonate has extensive application demand in battery, electronic equipment, medicine, optical glass and many other fields, and is an important basic lithium salt, and the purity of lithium carbonate is required in these fields.The carbonization decomposition method is a commonly used method for industrial preparation of high-purity lithium carbonate, which is realized by using a high-efficiency carbonization tower.The carbonization decomposition method usually uses a gas bubble or gas blowing method for carbonation reaction of carbon dioxide, carbon dioxide is blown into the carbonization tower, and lithium-containing slurry is injected into the carbonization tower.Under the reaction conditions, carbon dioxide and lithium-containing slurry are contacted to carry out carbonization reaction.After carbonization, the carbonization liquid is separated and purified to obtain high-purity lithium bicarbonate solution, and high-purity lithium carbonate is obtained after treatment.

[0003] When purifying lithium carbonate using a carbonization tower, gaseous CO2 reacts with liquid industrial low-purity lithium carbonate, the contact time is short, the contact area is small, the reaction rate is slow, and the utilization rate of CO2 is low, resulting in waste of CO2, high-purity lithium carbonate preparation cost is high, therefore, a high-efficiency carbonization tower for purifying lithium carbonate is needed. SUMMARY

[0004] The utility model discloses a kind of high-efficiency carbonization towers for purifying lithium carbonate to solve the problem of CO2 waste caused by short contact time, small contact area, slow reaction rate and low CO2 utilization rate of CO2 and lithium-containing slurry in carbonization tower, high-purity lithium carbonate preparation cost is high, and is presented.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A high-efficiency carbonization tower for purifying lithium carbonate includes a carbonization tower main body, a feed inlet, a gas outlet, an air inlet, a discharge outlet, a feed nozzle, a micro-nano bubble generator, a booster, and an ultrasonic generator. The feed inlet and the gas outlet are located at the top of the carbonization tower main body, and the air inlet and the discharge outlet are located at the bottom of the carbonization tower main body. The feed nozzle is installed at the top end of the carbonization tower and is connected to the feed inlet. The feed nozzle is used to spray lithium-containing slurry into the carbonization tower main body. The micro-nano bubble generator is used to generate nano-sized carbon dioxide bubbles. The micro-nano bubble generator is connected to the booster and then connected to the air inlet. The ultrasonic generator is installed inside the carbonization tower main body.

[0007] Preferably, the number of the feed spray heads is at least two and the lithium-containing slurry in the feed port is uniformly sprayed in the carbonization tower body.

[0008] Preferably, the micro-nano bubble generator is connected to a carbon dioxide gas source and processes the carbon dioxide gas into bubbles with a size range of 50-1000 nm.

[0009] Preferably, the pressure of the carbon dioxide bubbles after being pressurized by the booster into the gas inlet is 0.4-0.8 MPa.

[0010] Preferably, the gas inlet is a pipe obliquely inserted into the inside of the carbonization tower body, and the carbon dioxide bubbles impact upward into the inside of the carbonization tower body.

[0011] Preferably, the ultrasonic generator is installed at an intermediate position inside the carbonization tower body.

[0012] Preferably, the ultrasonic generator has an ultrasonic frequency of not less than 20 kHz and an intensity of 40 w / cm 2 .

[0013] Preferably, the stirring device includes a stirring shaft and stirring blades, the stirring shaft extends into the carbonization tower body, the stirring blades are installed on the stirring shaft, and the stirring device rotates and stirs inside the carbonization tower body.

[0014] Preferably, the stirring device is installed at an intermediate position inside the carbonization tower body.

[0015] Preferably, the cooling coil is installed outside or inside the carbonization tower body and used to cool the temperature inside the carbonization tower body.

[0016] Compared with the prior art, the beneficial effects of the present application are as follows: the micro-nano bubble generator is used to beat the carbon dioxide gas into nano-sized carbon dioxide bubbles, the gas inlet is arranged at the bottom of the carbonization tower, a booster is arranged to blow from the bottom upward, the feed spray head is used to uniformly spray the lithium-containing slurry downward from the top of the carbonization tower, most of the carbon dioxide bubbles and the lithium-containing slurry spray meet and react at the central position inside the carbonization tower, the particle size of the carbon dioxide and the lithium-containing slurry is reduced to improve the solubility of the carbon dioxide, the contact reaction area between the carbon dioxide and the lithium-containing slurry in the carbonization tower is increased, and thus the utilization rate of the carbon dioxide is improved; in addition, the ultrasonic generator is arranged to increase the mass transfer rate in the reaction process of the carbon dioxide and the lithium-containing slurry through the dispersion effect of the ultrasonic waves, improve the reaction rate, prolong the reaction time, and improve the utilization rate of the carbon dioxide. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or prior art description, and obviously, the drawings described below are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0018] Fig. 1 It is a kind of high-efficiency carbonization tower for purifying lithium carbonate, and the overall structure is simplified schematic diagram;

[0019] Fig. 2 It is the installation schematic diagram of feed inlet and feed spray head;

[0020] Fig. 3 It is the schematic diagram of feed spray head.

[0021] Wherein, carbonization tower main body 1, feed inlet 2, gas outlet 3, gas inlet 4, discharge port 5, feed spray head 6, micro-nano bubble generator 7, booster 8, ultrasonic generator 9, stirring device 10, cooling coil 11. Specific embodiments

[0022] In order to further understand the purpose, structure, features and functions of the present application, the following will be described in detail with examples.

[0023] In the description of the present application, it should be pointed out that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as limiting the device or element indicated or implied to have a specific orientation, structure and operation, therefore cannot be understood as limiting the present application.

[0024] Please combine Figs. 1-3 A kind of high-efficiency carbonization tower for purifying lithium carbonate, including carbonization tower main body 1, feed inlet 2, gas outlet 3, gas inlet 4, discharge port 5, feed spray head 6, micro-nano bubble generator 7, booster 8, ultrasonic generator 9;Feed inlet 2 and gas outlet 3 are arranged at the top of carbonization tower main body 1, gas inlet 4 and discharge port 5 are arranged at the bottom of carbonization tower main body 1, feed spray head 6 is installed at the top end inside carbonization tower and is connected with feed inlet 2, feed spray head 6 is used to spray lithium-containing slurry to the inside of carbonization tower main body 1, micro-nano bubble generator 7 is used to generate nanometer carbon dioxide bubbles, micro-nano bubble generator 7 is connected to booster 8 and then connected to gas inlet 4, ultrasonic generator 9 is installed inside carbonization tower main body 1.

[0025] The efficient carbonization tower in the utility model is used, carbon dioxide gas source is handled into nanometer bubble through micro-nano bubble generator 7, and after further pressurization through booster 8, enters inside carbonization tower main part 1;Lithium-containing slurry enters feed inlet 2 from feed inlet 2, and feed inlet 6 is evenly sprayed to the inside of carbonization tower main part 1, and nanometer carbon dioxide bubble makes the solubility of carbon dioxide in water higher, and the contact area of lithium-containing slurry increases, and the reaction rate improves, thereby improving the utilization rate of carbon dioxide, and reducing the consumption of carbon dioxide. After the reaction of carbon dioxide and lithium-containing slurry, lithium bicarbonate solution is generated from the outlet 5 below the carbonization tower main part 1, and the exhaust gas is discharged from the gas outlet 3 at the upper end of the carbonization tower main part 1. In the reaction process, the ultrasonic generator 9 is opened and emits ultrasonic waves, and the mass transfer rate of carbon dioxide bubble and lithium-containing slurry during the reaction is improved by the dispersion effect, which is beneficial to prolong the reaction time, improve the utilization rate of carbon dioxide and reduce the production cost.

[0026] In the utility model, micro-nano bubble generator 7, booster 8 and ultrasonic generator 9 can be selected according to actual demand and installed and used by selecting market products, and no more will be described here.

[0027] In some preferred embodiments, the number of feed inlet 6 is at least two, and the lithium-containing slurry in feed inlet 2 is evenly sprayed in carbonization tower main part 1. Multiple feed inlets 6 are connected to feed inlet 2, and can be evenly distributed at the top of carbonization tower main part 1, and the lithium-containing slurry in feed inlet 2 is separated into multiple small branches and evenly sprayed into carbonization tower main part 1, so as to slow down the flow speed of lithium-containing slurry, increase the reaction area and reaction time between carbon dioxide bubble and lithium-containing slurry, and make it fully react in the carbonization tower.

[0028] Feed inlet 6 can select any model of industrial nozzle on the market, and when selecting the nozzle, it needs to be noted that the diameter of each minimum unit water outlet of the nozzle needs to ensure that the lithium-containing slurry can be evenly and smoothly sprayed out, so as to avoid nozzle blockage. Fig. 2 and Fig. 3 As shown, a shower-shaped nozzle can be selected, and the top end of the nozzle can be connected with feed inlet 2 by screw thread, and the lithium-containing slurry directly enters feed inlet 6 from the pipeline of feed inlet 2, and is evenly divided into multiple fine streams and sprayed out.

[0029] In some preferred embodiments, micro-nano bubble generator 7 is connected to carbon dioxide gas source and processes carbon dioxide gas into bubbles with a size range of 50-1000nm. The nanometer carbon dioxide bubble has smaller particle size, higher solubility in clean water and can stay in water for a long time, which improves the reaction rate and the utilization rate of carbon dioxide, and at the same time, nanometer lithium carbonate can be obtained, which can inhibit the aggregation of crystallization.

[0030] In some preferred embodiments, the pressure of the pressurized carbon dioxide bubbles entering the gas inlet 4 is 0.4-0.8 MPa; further, the gas inlet 4 is a pipe inserted obliquely upward into the inside of the carbonization tower body 1, and the carbon dioxide bubbles impact upward into the inside of the carbonization tower body 1. The pressurizer 8 enables the carbon dioxide bubbles to impact into the inside of the carbonization tower body 1 at a certain speed, helping the nanoscale particle size carbon dioxide bubbles to meet and react with the lithium-containing slurry sprayed from the top in the middle of the carbonization tower, prolonging the residence time of the carbon dioxide and the lithium-containing slurry in the middle of the carbonization tower body 1, and enabling them to fully react to generate small particle size lithium bicarbonate.

[0031] In some preferred embodiments, the ultrasonic generator 9 is installed at an intermediate position in the inside of the carbonization tower body 1, which is the main position where the carbon dioxide bubbles and the lithium-containing slurry chemically react, so that the ultrasonic generator 9 is placed at this position and emits ultrasonic waves, which can directly act on most of the reactants, improving the reaction rate and the utilization rate of carbon dioxide; further, the ultrasonic frequency of the ultrasonic generator 9 is not less than 20 kHz, and the intensity is 40 w / cm 2 .

[0032] In some preferred embodiments, the high-efficiency carbonization tower for purifying lithium carbonate of the utility model further comprises a stirring device 10, which comprises a stirring shaft and stirring blades. The stirring shaft extends into the carbonization tower body 1, and the stirring blades are installed on the stirring shaft. The stirring device 10 rotates and stirs in the inside of the carbonization tower body 1. The stirring device 10 is used to prolong the contact time between the carbon dioxide bubbles and the lithium-containing slurry, thereby improving the utilization rate of carbon dioxide; further, the stirring device 10 is installed at an intermediate position in the inside of the carbonization tower body 1, i.e., the main reaction region between the carbon dioxide bubbles and the lithium-containing slurry, and can cooperate with ultrasonic waves to improve the reaction rate and the utilization rate of carbon dioxide.

[0033] In some embodiments, the high-efficiency carbonization tower for purifying lithium carbonate of the utility model further comprises a cooling coil 11, which is installed on the outside or inside of the carbonization tower body 1 and used to cool the temperature in the inside of the carbonization tower body 1, effectively avoiding the heat released by the reaction between the carbon dioxide and the lithium-containing slurry from causing the temperature in the carbonization tower body 1 to rise and thereby inhibiting the reaction.

[0034] The utility model has been described by the above related embodiments, however, the above embodiments are only examples for implementing the utility model. It must be pointed out that the disclosed embodiments do not limit the scope of the utility model. On the contrary, modifications and decorations made without departing from the spirit and scope of the utility model are all within the scope of the patent protection of the utility model.

Claims

1. A high efficiency carbonation column for purifying lithium carbonate, characterized by: The carbonization tower body, the feed inlet, the gas outlet, the gas inlet, the discharge outlet, the feed nozzle, the micro-nano bubble generator, the pressure booster, and the ultrasonic generator; the feed inlet and the gas outlet are arranged at the top of the carbonization tower body, the gas inlet and the discharge outlet are arranged at the bottom of the carbonization tower body, the feed nozzle is installed at the top end inside the carbonization tower and connected with the feed inlet, the feed nozzle is used to spray the lithium-containing slurry into the carbonization tower body, the micro-nano bubble generator is used to generate nano-sized carbon dioxide bubbles, the micro-nano bubble generator is connected with the pressure booster and then connected to the gas inlet, and the ultrasonic generator is installed inside the carbonization tower body.

2. The high efficiency carbonation column for purifying lithium carbonate according to claim 1, characterized by: The number of the feed nozzles is at least two, and the lithium-containing slurry in the feed inlet is uniformly sprayed in the carbonization tower body.

3. The high efficiency carbonation column for purifying lithium carbonate as claimed in claim 1, wherein: The micro-nano bubble generator is connected with a carbon dioxide gas source and processes the carbon dioxide gas into bubbles with a size range of 50-1000nm.

4. The high efficiency carbonation column for purifying lithium carbonate as claimed in claim 1, wherein: The pressure of the carbon dioxide bubbles after being pressurized by the pressure booster and entering the gas inlet is 0.4-0.8MPa.

5. The high efficiency carbonation column for purifying lithium carbonate as claimed in claim 1, wherein: The gas inlet is a pipeline inserted into the carbonization tower body in an upward direction, and the carbon dioxide bubbles enter the carbonization tower body by upward impact.

6. The high efficiency carbonation column for purifying lithium carbonate as claimed in claim 1, wherein: The ultrasonic generator is installed at the middle position inside the carbonization tower body.

7. The high efficiency carbonation column for purifying lithium carbonate as claimed in claim 6, characterized by: The ultrasonic frequency of the ultrasonic generator is not less than 20 kHz, and the intensity is 40 w / cm 2 .

8. The high efficiency carbonation column for purifying lithium carbonate as claimed in claim 1, wherein: The stirring device includes a stirring shaft and stirring blades, the stirring shaft extends into the carbonization tower body, the stirring blades are installed on the stirring shaft, and the stirring device rotates and stirs inside the carbonization tower body.

9. The high efficiency carbonation column for purifying lithium carbonate as claimed in claim 8, characterized by: The stirring device is installed at the middle position inside the carbonization tower body.

10. The high efficiency carbonation column for purifying lithium carbonate as claimed in claim 1, wherein: The cooling coil is installed outside or inside the carbonization tower body and is used to cool the temperature inside the carbonization tower body.

Images