Super mass transfer multiplier for lithium bicarbonate pyrolysis

Abstract

The utility model relates to the technical field of synergists, and provides a super mass transfer multiplier for lithium hydrogen carbonate pyrolysis, which comprises an outer cylinder, an inner cylinder and an outer cylinder, the rotary drum is rotationally arranged in the cavity, and a first cavity and a second cavity are formed between the rotary drum and the outer drum; the multiple heating blocks are arranged on the inner wall of the rotary drum at intervals, and hot air channels are formed in the heating blocks and communicate with the first cavity; and the heat source is arranged on the outer side of the outer cylinder, communicates with the first cavity through a pipeline and is used for introducing hot air into the first cavity. Through the technical scheme, the problem of how to realize rapid, uniform and efficient pyrolysis is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of enhancers, and in particular to a super mass transfer enhancer for thermal decomposition of lithium bicarbonate. Background Art

[0002] In today's society, with the rapid development of renewable energy technology and the growing demand for sustainable resource utilization, lithium bicarbonate, as an important chemical raw material and energy storage material, has attracted much attention for its efficient and green preparation methods. Especially in the fields of lithium-ion batteries, drug intermediates, electrolyte additives, etc., the market demand for high-quality lithium bicarbonate continues to rise. Traditional lithium bicarbonate preparation methods, especially pyrolysis processes, often face problems such as low mass transfer efficiency, uneven reaction, high energy consumption, and limited product purity. These limitations seriously affect production efficiency and economic benefits. Early lithium bicarbonate pyrolysis reactors mostly adopted static bed or fixed bed structures. Although the operation is simple, local hot spots, low thermal efficiency, and large mass transfer resistance are prone to occur during the treatment process, resulting in slow pyrolysis reaction rates, and product yields and purity are difficult to meet high-end application requirements. In addition, this type of reactor has limited control over pyrolysis temperature and atmosphere, making it difficult to accurately control the reaction process, and is prone to side reactions and incomplete pyrolysis.

[0003] To overcome the above defects, the industry has explored a variety of improvement strategies to improve the efficiency of lithium bicarbonate pyrolysis process, such as optimizing heat source design, improving heat transfer methods, and introducing mixing mechanisms such as stirring or vibration. However, existing improvement measures often fail to fundamentally solve the problem, especially in large-scale continuous production. How to achieve fast, uniform and efficient pyrolysis reaction while ensuring safety and stability is still a technical challenge. Utility Model Content

[0004] The utility model provides a super mass transfer enhancer for the pyrolysis of lithium bicarbonate, which solves the problem of how to achieve rapid, uniform and efficient pyrolysis in the related art.

[0005] The technical solution of the utility model is as follows:

[0006] A super mass transfer enhancer for lithium bicarbonate pyrolysis, comprising:

[0007] An outer cylinder having a cavity;

[0008] A rotating drum is rotatably disposed in the cavity, and a first cavity and a second cavity are formed between the rotating drum and the outer cylinder;

[0009] A plurality of heating blocks are provided, wherein the plurality of heating blocks are arranged at intervals on the inner wall of the drum, and a hot air channel is provided inside the heating block, and the hot air channel is communicated with the first cavity;

[0010] A heat source is arranged outside the outer cylinder, the heat source is connected to the first cavity through a pipeline, and the heat source is used to pass the hot air into the first cavity.

[0011] Preferably, the inner wall of the drum has a plurality of slots, and the heating block comprises:

[0012] The heat-conducting block has a clamping block, and the clamping block is clamped with the clamping slot;

[0013] a first air guide pipe, one end of which is connected to the first cavity, and the other end of which is connected to the hot air channel;

[0014] One end of the second air guide pipe is connected to the hot air channel, and the other end extends into the bottom of the inner side of the rotating drum.

[0015] Preferably, it also includes:

[0016] A protective cover, disposed on the outer cylinder, for shielding the cavity;

[0017] A top plate is arranged on the top of the outer cylinder, a receiving cavity is formed between the protective cover and the baffle, a through hole is provided in the middle of the top plate, the receiving cavity is communicated with the inside of the rotating cylinder through the through hole, and the receiving cavity is used to temporarily store water vapor and other generated gases;

[0018] The outer ring of the top plate is located at the top of the first cavity and is used to seal the first cavity.

[0019] Preferably, the heating block further has a drainage channel, one end of which is connected to the accommodating cavity, and the other end of which is connected to the second cavity.

[0020] Preferably, it also includes:

[0021] The driving part is arranged on the outer cylinder, the driving part is in driving connection with the rotating cylinder, and the driving part is used for driving the rotating cylinder to rotate.

[0022] Preferably, it also includes:

[0023] A boss is arranged on the inner bottom surface of the rotating drum;

[0024] The drum also has a plurality of drop holes, which are arranged in a ring shape on the bottom surface of the drum and are located between the outer wall of the boss and the inner wall of the drum.

[0025] An annular baffle is rotatably arranged on the bottom surface of the drum, and the annular baffle is used to block or unblock the drop hole.

[0026] Preferably, the outer cylinder has a feeding port at the bottom, the second cavity is connected to the feeding port, and the second cavity is funnel-shaped.

[0027] Preferably, it also includes:

[0028] There are a plurality of plug plates, which are respectively arranged on the heat-conducting block and are used for stirring and turbulence.

[0029] Preferably, the rotating drum is provided with a sealing ring, and the sealing ring divides the rotating drum and the outer drum into the first cavity and the second cavity.

[0030] The working principle and beneficial effects of the utility model are:

[0031] 1. In the utility model, the rotary drum is rotated in the cavity to form a first cavity and a second cavity, so that the lithium bicarbonate material is continuously tumbled and mixed in the rotary drum, which greatly enhances the relative movement between the material particles, effectively breaks the mass transfer resistance, realizes efficient contact and rapid mass transfer between the material and the hot gas, improves the uniformity of the reaction, reduces the local overheating or underheating phenomenon, and helps to improve the pyrolysis reaction rate and product consistency;

[0032] 2. The heating blocks are arranged at intervals on the inner wall of the drum, and have a hot air channel inside and are connected to the first cavity. This design allows the heat of the hot air to be directly and evenly transferred to the inner wall of the drum, achieving direct heating of the material, avoiding the loss of heat energy transfer in traditional reactors, and improving the utilization rate of heat energy. The external heat source is connected to the first cavity through a pipeline, and the hot air flow and temperature can be accurately controlled according to the reaction process, ensuring that the pyrolysis reaction is carried out under suitable conditions, avoiding the occurrence of side reactions, and is conducive to energy saving and consumption reduction and improving product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present utility model.

[0034] Figure 1 This is a schematic diagram of the external structure of the utility model booster;

[0035] Figure 2 for Figure 1 Sectional view at AA;

[0036] Figure 3 This is a schematic diagram of the structure of the heating block of the utility model;

[0037] Figure 4 This is a schematic diagram of the rotary drum structure of the utility model;

[0038] Figure 5 This is a schematic diagram of the connection structure between the rotary drum and the heating block of the utility model;

[0039] Figure 6This is a schematic diagram of the outer cylinder structure of the utility model;

[0040] Figure 7 This is a schematic diagram of the bottom structure of the rotary drum of the utility model;

[0041] Figure 8 This is a schematic diagram of the overall structure of the utility model booster;

[0042] Fig. 9 It is a schematic diagram of the top plate structure of the utility model.

[0043] In the figure: 1, outer cylinder; 2, protective cover; 3, rotating cylinder; 301, card slot; 302, blanking hole; 4, sealing ring; 5, annular baffle; 6, heating block; 601, heat conductive block; 602, first air duct; 603, second air duct; 604, card block; 605, drainage channel; 606, hot air channel; 7, plug plate; 8, first cavity; 9, heat source; 10, second cavity; 11, boss; 12, driving unit; 13, blanking port; 14, top plate; 1401, through hole. DETAILED DESCRIPTION

[0044] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the specific implementation methods of the utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0045] In order to simplify the drawings, only the parts related to the utility model are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically shown, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0046] In this article, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0047] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0048] Reference Figure 1 to Figure 9 , which is an embodiment of the utility model, proposes a super mass transfer enhancer for the thermal decomposition of lithium bicarbonate, comprising: an outer cylinder 1, having a cavity; a rotating cylinder 3, rotatably arranged in the cavity, a first cavity 8 and a second cavity 10 are formed between the rotating cylinder 3 and the outer cylinder 1; a plurality of heating blocks 6, the plurality of heating blocks 6 are arranged at intervals on the inner wall of the rotating cylinder 3, a hot gas channel 606 is provided inside the heating block 6, and the hot gas channel 606 is connected to the first cavity 8; a heat source 9, arranged outside the outer cylinder 1, the heat source 9 is connected to the first cavity 8 through a pipeline, and the heat source 9 is used to introduce hot gas into the first cavity 8.

[0049] In the above scheme, the outer cylinder 1 is made of high-quality high-temperature resistant stainless steel material, with a diameter of 1.2 meters and a length of 2.5 meters. The inner wall is coated with a high-temperature resistant heat-insulating coating to reduce heat loss. A cavity is formed inside the outer cylinder 1 to accommodate the rotating drum 3. The rotating drum 3 is made of high-strength aluminum alloy with a diameter of 1.1 meters. The gap between the rotating drum 3 and the outer cylinder 1 is uniform, forming a first cavity 8 and a second cavity 10. The two cavities are connected through a gas distribution pipe located at the axis of the rotating drum 3. Several heating blocks 6 are installed at equal intervals on the inner wall of the rotating drum 3. Each heating block 6 is made of a material with good thermal conductivity and has a hot air channel 606 inside. The hot air heated by the heat source 9 will enter. The surface of the heating block 6 is covered with a high-temperature resistant ceramic coating to enhance the heat conduction efficiency and prevent wear caused by direct contact of the material. An electric heat source 9 is arranged outside the outer cylinder 1, which is controlled by an intelligent thermostat and can provide precise temperature regulation within the range of 0-1000°C. The heat source 9 is connected to the first cavity 8 through a high-temperature stainless steel pipeline, and a flow meter and a valve are installed on the pipeline to accurately control the hot gas flow. After being heated, the hot gas (such as nitrogen or argon) generated by the heat source 9 enters the first cavity 8 through the pipeline, and then passes through the hot gas channel 606 inside the heating block 6 to directly transfer the heat to the inner wall of the drum 3 to heat the lithium bicarbonate material in the drum 3. Operation process Before starting the equipment, the lithium bicarbonate powder is first evenly loaded into the drum 3. The drive is started to start the drum 3 to rotate, and the temperature of the heat source 9 and the hot gas flow are set. After being heated by the heat source 9, the hot gas enters the first cavity 8 through the pipeline, and then transfers the heat to the drum 3 through the hot gas channel 606 inside the heating block 6. The lithium bicarbonate material in the drum 3 is constantly tumbling and mixing under the action of rotation, and is in close contact with the hot drum wall to achieve a rapid and uniform pyrolysis reaction. The gas product produced by pyrolysis is discharged upward through the second cavity 10, and then undergoes subsequent processing steps such as condensation and separation to obtain the desired lithium bicarbonate product. Through the above structure and operation mode, the super mass transfer enhancer of this embodiment effectively realizes efficient mass transfer, precise temperature control and uniform heating in the pyrolysis process of lithium bicarbonate, significantly improves the pyrolysis reaction rate, product quality and yield, and reduces energy consumption, and has good practicality and industrial application prospects.

[0050] Furthermore, the inner wall of the rotating drum 3 has a plurality of card grooves 301, and the heating block 6 includes: a heat conductive block body 601, having a card block 604, and the card block 604 is card-engaged with the card groove 301; a first air guide pipe 602, one end of which is connected to the first cavity 8, and the other end is connected to the hot air channel 606; a second air guide pipe 603, one end of which is connected to the hot air channel 606, and the other end extends into the inner bottom of the rotating drum 3.

[0051] In the above scheme, the heating block 6 includes a heat conductive block 601, a clamping block 604, a first air duct 602 and a second air duct 603. The clamping block 604 is arranged on one side or edge of the heat conductive block 601, matches the clamping groove 301 on the inner wall of the drum 3, and is fixed to the inner wall of the drum 3 by clamping. One end of the first air duct 602 is connected to the first cavity 8, and the other end is connected to the hot air channel 606, which is used to introduce hot air into the heat conductive block 601. One end of the second air duct 603 is connected to the hot air channel 606, and the other end extends into the inner bottom of the drum 3, so that the hot air circulates in the drum 3, further improving the heating efficiency and pyrolysis uniformity.

[0052] Furthermore, it also includes: a protective cover 2, which is arranged on the outer cylinder 1 and is used to shield the cavity; a top plate 14, which is arranged on the top of the outer cylinder 1, and a accommodating cavity is formed between the protective cover 2 and the baffle, and a through hole 1401 is provided in the middle of the top plate 14, and the accommodating cavity is connected with the inside of the rotating cylinder 3 through the through hole 1401, and the accommodating cavity is used to temporarily store water vapor and other generated gases; the outer circle of the top plate 14 is located at the top of the first cavity 8, and is used to seal the first cavity 8.

[0053] In the above scheme, the protective cover 2 is arranged on the outer cylinder 1 to shield the cavity and protect the internal equipment from the external environment. The top plate 14 is arranged on the top of the outer cylinder 1, and a receiving cavity is formed between the protective cover 2 and the top plate 14. The middle part of the top plate 14 has a through hole 1401, and the receiving cavity is connected to the inside of the rotating cylinder 3 through the through hole 1401, and is used to temporarily store water vapor and other generated gases. The outer ring of the top plate 14 is located at the top of the first cavity 8, which is used to block the first cavity 8 to ensure the circulation and distribution of hot air in the first cavity 8.

[0054] Furthermore, the heating block 6 also has a drainage channel 605, one end of which is connected to the accommodating chamber, and the other end is connected to the second cavity 10. The heating block 6 also has a drainage channel 605, one end of which is connected to the accommodating chamber, and the other end is connected to the second cavity 10, which is used to guide the gas temporarily stored in the accommodating chamber to the second cavity 10. In the process of the drainage channel 605 entering the heating block 6 and the heating block 6, the gas can also dissipate heat to the surroundings, indirectly participate in the pyrolysis reaction, and then be discharged from the system.

[0055] Furthermore, it also includes: a driving unit 12, which is arranged on the outer cylinder, and the driving unit 12 is connected to the rotating drum 3, and the driving unit 12 is used to drive the rotating drum 3 to rotate. The driving unit 12 can be a power device such as a motor, a reducer, etc., which is connected to the rotating drum 3 through a transmission mechanism such as a chain, a belt, and a gear to achieve stable and continuous rotation of the rotating drum 3.

[0056] Furthermore, it also includes: a boss 11, which is arranged on the inner bottom surface of the rotating drum 3; the rotating drum 3 also has a plurality of drop holes 302, and the plurality of drop holes 302 are arranged in a ring shape on the bottom surface of the rotating drum 3 and are located between the outer wall of the boss 11 and the inner wall of the rotating drum 3; an annular baffle 5, which is rotatably arranged on the bottom surface of the rotating drum 3, and the annular baffle 5 is used to block or cancel the blockage of the drop holes 302.

[0057] In the above scheme, the boss 11 is a truncated cone, and the solid material after pyrolysis will enter the position of the drop hole 302 along the inclined surface of the boss 11. When the annular baffle 5 is opened, the solid material after pyrolysis will enter the second cavity 10 through the drop hole 302 and then be discharged.

[0058] Furthermore, the outer cylinder 1 has a feed opening at the bottom, and the second cavity 10 is connected to the feed opening, and the second cavity 10 is funnel-shaped. A support cylinder for supporting the driving part 12 is also provided in the second cavity 10, and a plurality of filter holes connected to the feed opening are provided on the side wall of the support cylinder, and the solid materials after pyrolysis will enter the feed opening through the filter holes and be discharged.

[0059] Furthermore, it also includes: a plurality of plug plates 7, which are respectively arranged on the heat conductive block 601, and the plug plates 7 are used for stirring and turbulence. When the drum 3 rotates at a low speed, the plug plates 7 play a stirring role. When the drum 3 rotates at a high speed, due to the centrifugal force, the pyrolyzed solid material or lithium bicarbonate powder will stick to the inner wall of the drum 3, and the hot air entering the drum 3 between the two adjacent plug plates 7 arranged obliquely will form turbulence, which can blow the material on the inner wall of the drum 3, thereby achieving turbulence stirring.

[0060] Furthermore, the rotating drum 3 is provided with a sealing ring 4, which divides the rotating drum 3 and the outer drum 1 into a first cavity 8 and a second cavity 10. This can not only stabilize the rotation, but also improve the sealing performance of the first cavity 8 and the second cavity 10.

[0061] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A super mass transfer enhancer for lithium bicarbonate pyrolysis, characterized in that: include: An outer cylinder (1) having a cavity; A rotating drum (3) is rotatably disposed in the cavity, and a first cavity (8) and a second cavity (10) are formed between the rotating drum (3) and the outer drum (1); A plurality of heating blocks (6), wherein the plurality of heating blocks (6) are arranged at intervals on the inner wall of the rotating drum (3), wherein a hot air channel (606) is provided inside the heating block (6), and the hot air channel (606) is communicated with the first cavity (8); A heat source (9) is arranged outside the outer tube (1); the heat source (9) is connected to the first cavity (8) through a pipeline; the heat source (9) is used to introduce the hot air into the first cavity (8).

2. A super mass transfer enhancer for lithium bicarbonate pyrolysis according to claim 1, characterized in that: The inner wall of the rotating drum (3) has a plurality of slots (301), and the heating block (6) comprises: The heat-conducting block (601) has a clamping block (604), and the clamping block (604) is clamped with the clamping slot (301); a first air guide pipe (602), one end of which is in communication with the first cavity (8) and the other end of which is in communication with the hot air channel (606); The second air guide pipe (603) has one end connected to the hot air channel (606) and the other end extending into the inner bottom of the rotating drum (3).

3. A super mass transfer enhancer for lithium bicarbonate pyrolysis according to claim 2, characterized in that: Also includes: A protective cover (2) is arranged on the outer cylinder (1) and is used to shield the cavity; A top plate (14) is arranged on the top of the outer cylinder (1), a receiving cavity is formed between the protective cover (2) and the top plate (14), a through hole (1401) is provided in the middle of the top plate (14), the receiving cavity is connected with the inside of the rotating cylinder (3) through the through hole (1401), and the receiving cavity is used to temporarily store water vapor and generated gas; The outer ring of the top plate (14) is located at the top of the first cavity (8) and is used to seal the first cavity (8).

4. A super mass transfer enhancer for lithium bicarbonate pyrolysis according to claim 3, characterized in that: The heating block (6) further comprises a drainage channel (605), one end of which is in communication with the accommodating cavity, and the other end of which is in communication with the second cavity (10).

5. The super mass transfer enhancer for lithium bicarbonate pyrolysis according to claim 1, characterized in that: Also includes: A driving part (12) is arranged on the outer cylinder (1), the driving part (12) is in driving connection with the rotating cylinder (3), and the driving part (12) is used to drive the rotating cylinder (3) to rotate.

6. The super mass transfer enhancer for lithium bicarbonate pyrolysis according to claim 1, characterized in that: Also includes: A boss (11) is arranged on the inner bottom surface of the rotating drum (3); The rotating drum (3) further comprises a plurality of drop holes (302), the plurality of drop holes (302) being arranged in a ring shape on the bottom surface of the rotating drum (3) and being located between the outer wall of the boss (11) and the inner wall of the rotating drum (3); An annular baffle (5) is rotatably disposed on the bottom surface of the rotating drum (3), and the annular baffle (5) is used to block or unblock the drop hole (302).

7. The super mass transfer enhancer for lithium bicarbonate pyrolysis according to claim 1, characterized in that: The outer cylinder (1) has a feed opening at the bottom, the second cavity (10) is connected to the feed opening, and the second cavity (10) is funnel-shaped.

8. The super mass transfer enhancer for lithium bicarbonate pyrolysis according to claim 2, characterized in that: Also includes: There are a plurality of plug plates (7), and the plurality of plug plates (7) are respectively arranged on the heat conductive block (601), and the plug plates (7) are used for stirring and turbulence.

9. The super mass transfer enhancer for lithium bicarbonate pyrolysis according to claim 1, characterized in that: The rotating cylinder (3) is provided with a sealing ring (4), and the sealing ring (4) divides the rotating cylinder (3) and the outer cylinder (1) into the first cavity (8) and the second cavity (10).

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