Efficient carbonization tower for purifying lithium carbonate

Abstract

The utility model provides a high-efficiency carbonizer for purifying lithium carbonate, which is characterized in that a micro-nano bubble generator is externally connected with a gas inlet at the bottom of the carbonizer and is used for treating carbon dioxide gas into nanoscale bubbles, and a gas inlet pipe is connected in the carbonizer and is used for upwards spraying the carbon dioxide bubbles into the carbonizer; a cooling column is arranged in the carbonization tower and is connected with external cooling liquid to circularly cool the temperature in the carbonization tower, and a spiral flow channel is arranged at the periphery of the cooling column and is used for guiding lithium-containing slurry fed from the tower top to spirally flow downwards; the outer side of the cooling column is sleeved with a flow slowing plate, the periphery of the flow slowing plate is fixed to the inner wall of the carbonization tower body, an overflow hole is formed in the center of the flow slowing plate, the diameter of the overflow hole is larger than that of the cooling column, and the flow slowing plate is used for receiving lithium-containing slurry and guiding the lithium-containing slurry to flow to the spiral flow channel below the flow slowing plate from the overflow hole.

Description

TECHNICAL FIELD

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

[0002] High -purity lithium carbonate has extensive application demand in the field such as battery, electronic equipment, optical glass, and usually uses carbonization decomposition method when industrial preparation purifies, utilizes carbonization tower to blow into carbon dioxide and carry out carbonization reaction with low -purity lithium carbonate or lithium-containing slurry, obtains high -purity lithium bicarbonate solution after separation and purification, and obtains high -purity lithium carbonate after further processing. In the process of the above preparation and purification of lithium carbonate, the contact reaction time of carbon dioxide gas and lithium-containing slurry is short, and the reaction rate is low, and the blown carbon dioxide gas cannot be better used, causing waste, increasing the preparation cost of purified lithium carbonate, so a high -efficient carbonization tower for lithium carbonate purification is required. SUMMARY

[0003] The utility model discloses to solve the problem of low efficiency of the current purification of lithium carbonate in carbonization tower, and provides a high -efficient carbonization tower for lithium carbonate purification.

[0004] To achieve the above object, the utility model adopts the following technical scheme:

[0005] A kind of high -efficient carbonization tower for lithium carbonate purification, including carbonization tower main body, the top of the carbonization tower main body is provided with feed inlet and gas outlet, the bottom of the carbonization tower main body is provided with gas inlet and discharge port;The end of the gas inlet located outside the carbonization tower main body is connected with micro-nano bubble generator, the micro-nano bubble generator is used to process carbon dioxide gas into nano bubble, the end of the gas inlet located inside the carbonization tower main body is provided with gas inlet pipe, the upper side of the gas inlet pipe is provided with gas hole and is used to spray nano carbon dioxide bubble from the gas hole;

[0006] The inside of the carbonization tower main body is equipped with cooling column, the cooling column is hollow structure, the bottom end and the top end of the cooling column are equipped with water inlet pipe and water outlet pipe respectively, the water inlet pipe and the water outlet pipe are connected to the outside of the carbonization tower main body, cooling water enters the cooling column from the water inlet pipe and flows out from the water outlet pipe, the outside of the cooling column is equipped with spiral flow channel that spirals downward, the spiral flow channel is used to guide lithium-containing slurry to flow downward;

[0007] The outside of the cooling column is equipped with buffer plate, the peripheral part of the buffer plate is fixed on the inner wall of the carbonization tower main body, the central part of the buffer plate is equipped with overflow hole, the diameter of the overflow hole is greater than the diameter of the cooling column, the buffer plate is used to receive lithium-containing slurry and guide lithium-containing slurry to flow on the spiral flow channel below from the overflow hole.

[0008] Preferably, the main body of the air inlet pipe is a ring pipe structure, and the inner diameter of the ring pipe structure is greater than the diameter of the cooling column.

[0009] Preferably, the air inlet holes are uniformly distributed on the top surface of the air inlet pipe, and carbon dioxide bubbles are sprayed upward from the air inlet holes into the carbonization tower main body.

[0010] Preferably, the number of air inlet ports is at least two and uniformly distributed on the bottom of the carbonization tower main body, and each air inlet port is connected to the main ring pipe structure of the air inlet pipe.

[0011] Preferably, the cooling column is installed in the center of the carbonization tower main body, and the axis of the cooling column coincides with the axis of the carbonization tower main body.

[0012] Preferably, the feeding port is correspondingly arranged above the cooling column and the spiral flow channel.

[0013] Preferably, the slow flow plate is horizontally arranged inside the carbonization tower main body.

[0014] Preferably, the slow flow plate further comprises a baffle ring arranged on the periphery of the overflow hole and extending upward.

[0015] Preferably, the baffle ring is a mesh structure with holes.

[0016] Preferably, the micro-nano bubble generator is connected to a carbon dioxide gas source and processes carbon dioxide gas into bubbles with a size ranging from 50 to 1000 nm.

[0017] Compared with the prior art, the beneficial effects of the present application are as follows: The micro-nano bubble generator processes carbon dioxide gas into nano-sized carbon dioxide bubbles, thereby increasing the reaction contact area between carbon dioxide and lithium-containing slurry, improving the reaction rate and the utilization rate of carbon dioxide, and avoiding waste of carbon dioxide gas. The cooling column is arranged, and a spiral flow channel is arranged on the cooling column to guide most of the lithium-containing slurry to flow along the spiral flow channel and the cooling column. On the one hand, the falling time of the lithium-containing slurry is prolonged, and the carbonization reaction efficiency is improved. On the other hand, the cooling effect is good, and the heat release of the carbonization reaction does not affect the purification of lithium carbonate. In addition, a slow flow plate is arranged in the carbonization tower main body. The slow flow plate can receive most of the lithium-containing slurry that separates from the spiral flow channel. When the liquid on the slow flow plate is too much, it flows out of the overflow hole to the spiral flow channel of the lower half of the cooling column, further prolonging the flow speed of the lithium-containing slurry, and causing carbon dioxide bubbles to overflow upward from the overflow hole, thereby ensuring sufficient contact reaction between the carbon dioxide bubbles and the lithium-containing slurry. BRIEF DESCRIPTION OF DRAWINGS

[0018] 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, obviously, the drawings described in the following 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.

[0019] Figure 1 It is a structural simplified schematic diagram of a high-efficiency carbonization tower for lithium carbonate purification;

[0020] Figure 2 It is a top view structural schematic diagram of a slow flow plate;

[0021] Figure 3 It is a structural schematic diagram of a slow flow plate;

[0022] Figure 4 It is a structural schematic diagram of an air inlet pipe.

[0023] Among them, the carbonization tower main body 1, the feed inlet 2, the gas outlet 3, the air inlet 4, the discharge port 5, the micro-nano bubble generator 6, the air inlet pipe 7, the air inlet hole 71, the cooling column 8, the water inlet pipe 81, the water outlet pipe 82, the spiral flow channel 9, the slow flow plate 10, the overflow hole 101, the retaining ring 102. DETAILED DESCRIPTION

[0024] In order to further understand the purpose, structure, characteristics and functions of the present application, the following will be described in detail in conjunction with the embodiments.

[0025] 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 a limitation on the present application. The device or element must have a specific orientation, a specific orientation and operation, therefore it cannot be understood as a limitation on the present application.

[0026] Please refer to Figures 1-4The utility model provides a high -efficient carbonization tower for lithium carbonate purification, including carbonization tower main part 1, the top of carbonization tower main part 1 is provided with feed inlet 2 and gas outlet 3, and the bottom of carbonization tower main part 1 is provided with gas inlet 4 and discharge port 5, one end of gas inlet 4 is connected with micro -nano bubble generator 6 outside carbonization tower main part 1, and micro -nano bubble generator 6 is used to handle carbon dioxide gas into nanometer bubble, and the one end of gas inlet 4 is provided with gas inlet pipe 7 inside carbonization tower main part 1, and the upper side of gas inlet pipe 7 is provided with gas inlet hole 71 and is used to make nanometer carbon dioxide bubble from gas inlet hole 71. Carbon dioxide bubble is nanometer bubble by using micro -nano bubble generator 6, compared with ordinary bubble, its volume is smaller, and the solubility in water is higher, is favorable for more efficiently with lithium-containing slurry carbonization reaction occurs, and it is easier to produce nanometer high -purity lithium carbonate product.

[0027] The inside of carbonization tower main part 1 is equipped with cooling column 8, cooling column 8 is hollow structure, and the bottom end and top end of cooling column 8 are equipped with water inlet pipe 81 and water outlet pipe 82 respectively, water inlet pipe 81 and water outlet pipe 82 are connected to the outside of carbonization tower main part 1, cooling water enters cooling column 8 from water inlet pipe 81 and flows out from water outlet pipe 82, and the outside of cooling column 8 is equipped with spiral flow channel 9 that spirals downwards, and spiral flow channel 9 is used to guide lithium-containing slurry to flow downwards. When carbon dioxide and lithium-containing slurry carry out carbonization reaction, heat is released, the temperature in carbonization tower main part 1 rises, and then has negative influence to the carbonization reaction in its inside, and cooling column 8 can effectively reduce the temperature in carbonization tower main part 1, to guarantee the reaction rate in carbonization tower main part 1. In addition, the outer periphery of cooling column 8 is provided with spiral flow channel 9, and lithium-containing slurry flows into the tower from top feed inlet 2 and spirally flows downwards along spiral flow channel 9 from top, on the one hand, the route and time of lithium-containing slurry falling from top to bottom are prolonged, so that lithium-containing slurry and carbon dioxide bubble can be fully reacted, improve carbon dioxide use rate, reduce carbon dioxide consumption and waste, and on the other hand, spiral flow channel 9 is close to cooling column 8, so most of the reaction heat release also gathers in the periphery of cooling column 8, so cooling column 8 can effectively cool the heat in the tower, with lower cost, higher cooling efficiency is realized.

[0028] Please refer to Figure 2 And Figure 3The outer side of the cooling column 8 is provided with a flow slowing plate 10, the peripheral part of the flow slowing plate 10 is fixed on the inner wall of the carbonization tower main body 1, the central part of the flow slowing plate 10 is provided with an overflow hole 101, the diameter of the overflow hole 101 is larger than the diameter of the cooling column 8, the flow slowing plate 10 is used to receive the lithium-containing slurry and guide the lithium-containing slurry to flow from the overflow hole 101 to the spiral flow channel 9 below. When the lithium-containing slurry enters the tower from the feed inlet 2 at the top of the tower, most of the lithium-containing slurry spirals downward along the spiral flow channel 9, but a small part of the lithium-containing slurry may splash out of the spiral flow channel 9 when entering the tower or flowing on the spiral flow channel 9, and these lithium-containing slurries fall on the flow slowing plate 10 and are temporarily stored, stay on the flow slowing plate 10 and fully react with carbon dioxide bubbles, so as to avoid the lithium-containing slurry from accumulating at the bottom of the tower too early, increase the reaction contact area, and further increase the reaction rate. If there is too much slurry on the flow slowing plate 10, it will flow into the spiral flow channel 9 from the overflow hole 101, which can send the slurry that has separated from the spiral flow channel 9 back into the spiral flow channel 9. The flow slowing plate 10 can also be provided with a scraper, which can be electric, pneumatic or other structures that can be controlled externally. When necessary, the operator can control the scraper to rotate and scrape all the slurry on the flow slowing plate 10 into the overflow hole 101, so as to avoid leaving slurry on the flow slowing plate 10.

[0029] Please refer to Figure 4 In some embodiments, the main body of the gas inlet pipe 7 is a ring pipe structure, and the inner diameter of the ring pipe structure is larger than the diameter of the cooling column 8. The ring pipe structure of the gas inlet pipe 7 is located below and surrounds the cooling column 8, so as to avoid the gas bubbles sprayed from the gas inlet pipe 7 from hitting the bottom of the cooling column 8, thereby affecting the reaction between the carbon dioxide bubbles and the lithium-containing slurry.

[0030] In further embodiments, the gas inlet holes 71 are uniformly distributed on the top surface of the gas inlet pipe 7, and the carbon dioxide bubbles are sprayed upward into the carbonization tower main body 1 from the gas inlet holes 71; so that the carbon dioxide bubbles are uniformly distributed on the peripheral part of the cooling column 8 and move upward, and fully react with the lithium-containing slurry in the spiral flow channel 9.

[0031] In further embodiments, the number of gas inlets 4 is at least two and is uniformly distributed on the bottom of the carbonization tower main body 1, and each gas inlet 4 is connected to the main ring pipe structure of the gas inlet pipe 7, so that carbon dioxide bubbles can be input into the gas inlet pipe 7 of the ring pipe structure from multiple positions, and the carbon dioxide bubbles are uniformly output.

[0032] In some embodiments, the cooling column 8 is installed in the center of the carbonization tower main body 1, and the axis of the cooling column 8 coincides with the axis of the carbonization tower main body 1; so that the cooling column 8 uniformly radiates outward to cool, and has a good overall cooling effect, the spiral flow channel 9 provided on the cooling column 8 is also located in the center of the tower, which can better contact and fully react with the carbon dioxide bubbles, and this symmetrical structure is beneficial to the installation of other parts in the tower.

[0033] In some preferred embodiments, the feeding port 2 is arranged above the cooling column 8 and the spiral flow channel 9, so that the lithium-containing slurry can directly fall onto the spiral flow channel 9 from the top end and spiral down from the spiral flow channel 9.

[0034] In some preferred embodiments, the slow flow plate 10 is horizontally arranged inside the carbonation tower body 1, so that the lithium-containing slurry on the slow flow plate 10 is uniformly distributed and fully reacts with the carbon dioxide bubbles.

[0035] Please refer to Figure 2 and Figure 3 In some embodiments, the slow flow plate 10 further comprises a baffle ring 102 arranged on the periphery of the overflow hole 101 and extending upward. Preferably, the baffle ring 102 is a mesh structure with holes. This structure can effectively prevent large particles of reactants on the slow flow plate 10 from quickly sliding into the overflow hole 101 and falling to the bottom of the tower, thereby prolonging the contact area and contact time of the large particles of reactants with carbon dioxide, facilitating the full reaction of the lithium-containing slurry with carbon dioxide, and the mesh structure of the baffle ring 102 does not hinder the flow of the slurry.

[0036] In some embodiments, the micro-nano bubble generator 6 is connected to a carbon dioxide gas source and processes carbon dioxide gas into bubbles with a size ranging from 50 to 1000 nm.

[0037] The efficient carbonation tower for lithium carbonate purification disclosed by the utility model, by arranging a micro-nano bubble generator in front of the gas inlet, carbon dioxide gas is processed into nano bubbles, thereby improving the utilization rate of carbon dioxide and reducing the waste loss of carbon dioxide; in addition, a cooling column is arranged in the carbonation tower, and a spiral flow channel is arranged on the outer periphery of the cooling column, so that the lithium-containing slurry of the top feeding port spirals around the cooling column along the spiral flow channel, on the one hand, the distance and time of the slurry reaching the bottom of the tower are prolonged, which is beneficial to the full carbonation reaction and improves the reaction rate and the utilization rate of raw materials; on the other hand, most of the reaction is completed close to the cooling column, so that the cooling column can fully play a cooling role, take away the heat released during the reaction, maintain the appropriate reaction temperature in the tower, and is beneficial to ensuring the carbonation reaction rate. Finally, a horizontal slow flow plate is arranged in the middle of the cooling column in the carbonation tower, which can receive the slurry that has escaped from the spiral flow channel, the excess slurry on the slow flow plate falls into the lower half of the spiral flow channel along the overflow hole, which not only plays a role in collecting the slurry and accelerating the reaction, but also can introduce the collected lithium-containing slurry into the spiral flow channel.

[0038] The utility model has been described by the above related embodiments, however the above embodiment is only the example of implementing the utility model. It must be pointed out that the disclosed embodiment does not limit the scope of the utility model. On the contrary, the change and the decoration made without departing from the spirit and scope of the utility model all belong to the patent protection scope of the utility model.

Claims

1. A high-efficiency carbonization column for purifying lithium carbonate, characterized by comprising: The carbonization tower body is provided with a feed inlet and a gas outlet at the top, and a gas inlet and a discharge outlet at the bottom; one end of the gas inlet outside the carbonization tower body is connected with a micro-nano bubble generator, which is used to process carbon dioxide gas into nano bubbles; the other end of the gas inlet inside the carbonization tower body is provided with a gas inlet pipe, and the upper side of the gas inlet pipe is provided with a gas inlet hole for spraying nano carbon dioxide bubbles from the gas inlet hole; The inside of the carbonization tower body is provided with a cooling column, which is a hollow structure, and the bottom end and the top end of the cooling column are respectively provided with a water inlet pipe and a water outlet pipe, both of which are connected to the outside of the carbonization tower body; cooling water enters the cooling column from the water inlet pipe and flows out from the water outlet pipe; the outside of the cooling column is provided with a spiral flow channel spirally downward, which is used to guide the downward flow of lithium-containing slurry; The outside of the cooling column is provided with a flow slowing plate, the peripheral part of the flow slowing plate is fixed on the inner wall of the carbonization tower body, the central part of the flow slowing plate is provided with an overflow hole, the diameter of the overflow hole is greater than the diameter of the cooling column, and the flow slowing plate is used to receive lithium-containing slurry and guide the lithium-containing slurry to flow from the overflow hole to the spiral flow channel below.

2. The efficient carbonization column for purifying lithium carbonate according to claim 1, characterized by: The main body of the gas inlet pipe is a ring pipe structure, and the inner diameter of the ring pipe structure is greater than the diameter of the cooling column.

3. The efficient carbonization column for purifying lithium carbonate according to claim 2, characterized by: The gas inlet holes are uniformly distributed on the top surface of the gas inlet pipe, and carbon dioxide bubbles are sprayed upward into the carbonization tower body from the gas inlet holes.

4. The efficient carbonization column for purifying lithium carbonate according to claim 3, characterized by: The number of gas inlets is at least two and is uniformly distributed on the bottom of the carbonization tower body, and each gas inlet is connected to the main ring pipe structure of the gas inlet pipe.

5. The efficient carbonization column for purifying lithium carbonate according to claim 1, characterized by: The cooling column is installed in the center of the carbonization tower body, and the axis of the cooling column coincides with the axis of the carbonization tower body.

6. The efficient carbonization column for purifying lithium carbonate according to claim 1, wherein: The feed inlet is correspondingly arranged above the cooling column and the spiral flow channel.

7. The efficient carbonization column for purifying lithium carbonate according to claim 1, wherein: The flow slowing plate is horizontally arranged inside the carbonization tower body.

8. The efficient carbonization column for purifying lithium carbonate according to claim 1, characterized by: The flow slowing plate further comprises a retaining ring, which is arranged around the overflow hole and extends upward.

9. The efficient carbonization column for purifying lithium carbonate according to claim 8, characterized by: The retaining ring is a mesh structure with holes.

10. The efficient carbonization column for purifying lithium carbonate according to claim 1, wherein: The micro-nano bubble generator is connected to a carbon dioxide gas source and processes carbon dioxide gas into bubbles with a size ranging from 50 to 1000 nm.

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