Methylene methanedisulfonate synthesizer

Abstract

The utility model provides a methylene methanedisulfonate synthesizer. The methylene methanedisulfonate synthesizer comprises a kettle body, a stirring temperature equalizing assembly and a dripping pipe, the top of the kettle body is provided with a feed port, an exhaust port and a pressure gauge, an inner cavity is provided with a temperature detector, the bottom is provided with a discharge port, and the outer side is covered with a heat preservation jacket; the stirring temperature equalizing assembly comprises a stirrer, a driving motor and a double-channel rotating joint; the stirrer extends into the inner cavity of the kettle body, is connected with the driving motor, is of a hollow structure and is provided with a liquid inlet and outlet circulating channel; one channel of the double-channel rotating joint is connected with the liquid inlet end of the liquid inlet and outlet circulating channel, and the other channel is connected with the liquid outlet end of the liquid inlet and outlet circulating channel; the material dripping pipe comprises a material injection pipe arranged at the top of the kettle body, a material uniformizing disc connected with the lower end of the material injection pipe and suspended in the kettle body, and a plurality of material discharging nozzles distributed on the lower end surface of the material uniformizing disc. According to the methylene methanedisulfonate synthesis device, materials can be dispersed and uniformly fed, and meanwhile, the temperature of each part in the kettle body can be quickly, uniformly and consistently.

Description

Technical Field

[0001] The utility model belongs to the field of methylene disulfonate production equipment, in particular to a methylene disulfonate synthesis device. Background Art

[0002] Methylene disulfonate (MMDS) is a new type of electrolyte additive for lithium-ion batteries. In the production of lithium battery electrolytes, batteries with methylene disulfonate (MMDS) added can greatly improve the high-temperature cycle performance of lithium batteries and significantly extend the service life of lithium batteries. It is suitable for power batteries, especially power batteries with lithium manganese oxide as the positive electrode material. MMDS can prevent the Mn melted at high temperature from being adsorbed on the negative electrode surface, inhibit the impedance increase, effectively improve the cycle characteristics, and greatly increase its cycle life.

[0003] The synthesis process of methanedisulfonic acid methylene cyclopentane includes adding methylsulfonyl chloride to a synthesis kettle, then slowly dropping sulfur trioxide, keeping the temperature at a certain temperature for reaction, then cooling, adding cyclohexane, adding polyformaldehyde in batches, controlling and adjusting the reaction temperature, until the reaction is completed, and obtaining a reaction completion liquid, and then performing subsequent operations such as material analysis and recrystallization to obtain the final product. The process of obtaining the reaction completion liquid by the reaction of the reactants is carried out in a reaction synthesis kettle. The structure of the existing reaction synthesis kettle is relatively simple. The feed is usually added directly from the feed port. The feed liquid entering the kettle cannot be evenly dispersed in time, especially for the feed liquid that needs to be slowly dropped and evenly dispersed. The method of adding directly from the feed port is simple and crude, which affects the reaction quality; in addition, since the temperature of the reaction system needs to be controlled during the reaction, the existing means is generally to inject a refrigerant liquid or a heat medium liquid into the jacket of the outer wall of the kettle body to achieve cooling or heating. This method has a temperature difference between the position close to the kettle wall and the position at the center of the kettle body. As a result, the temperature in various parts of the kettle cannot be quickly and evenly consistent. Although stirring can be used to make the temperature consistent as soon as possible, the effect is limited. The temperature in various parts of the kettle still cannot be quickly consistent, affecting the reaction process and reaction effect. Utility Model Content

[0004] In view of this, in order to solve the above technical problems, the utility model proposes a methylene disulfonate synthesis device with reasonable structural design, which can disperse and evenly add materials, ensure that the temperature at various places in the kettle is quickly and evenly consistent, and optimize the reaction process.

[0005] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0006] A methylene methane disulfonate synthesis device, comprising:

[0007] A kettle body, wherein the top of the kettle body is provided with a feeding port, an exhaust port and a pressure gauge connected to the inner cavity thereof, the inner cavity is provided with a temperature detector, the bottom is provided with a discharge port, and the outer wall is covered with a heat-insulating jacket;

[0008] A stirring and temperature-averaging component, the stirring and temperature-averaging component comprises a stirrer, a drive motor and a dual-channel rotary joint; the lower end of the stirrer extends into the inner cavity of the kettle body, and the upper end is connected to the output end of the drive motor disposed on the outside of the kettle body; the stirrer is a hollow structure and is provided with an inlet and outlet liquid circulation channel; one channel of the dual-channel rotary joint is connected to the liquid inlet end of the inlet and outlet liquid circulation channel, and the other channel is connected to the liquid outlet end of the inlet and outlet liquid circulation channel; the dual-channel rotary joint is externally connected to a heat exchange medium circulation supply device;

[0009] The dripping pipe includes a feeding pipe connected to the inner cavity of the kettle body and provided with a flow regulating valve arranged on the top of the kettle body, a material balancing plate connected to the lower end of the feeding pipe and suspended in the inner cavity of the kettle body, and a plurality of discharge nozzles evenly distributed on the lower end surface of the material balancing plate.

[0010] The two channels of the double-channel rotary joint are respectively connected to the liquid inlet and liquid outlet of the inlet and outlet liquid circulation channel to form a circulating flow channel for the heat exchange medium; the heat exchange medium circulation supply device supplies the heat exchange medium to one channel of the double-channel rotary joint, which then flows into the inlet and outlet liquid circulation channel of the agitator, and finally flows out from the other channel of the double-channel rotary joint after circulation and is sent back to the heat exchange medium circulation supply device; the agitator is arranged in the kettle body, and can cooperate with the insulation jacket while stirring, and cool or heat the system in the inner cavity of the kettle body at the same time, reduce the temperature difference in various places in the kettle body, and make the temperature in various places in the kettle body quickly and uniformly; because the double-channel rotary joint is used to connect the agitator, it will not affect the stirring function of the agitator while forming the heat exchange medium circulation path; the drip tube adopts a uniform material tray with multiple discharge nozzles for feeding, and can drip the liquid that needs to be slowly and evenly dispersed, such as sulfur trioxide, into the kettle body in a dispersed manner, which is beneficial to the reaction.

[0011] Furthermore, the kettle body includes a kettle body and a kettle cover detachably installed on the top of the kettle body; the feeding port, the exhaust port and the pressure gauge are all fixed on the kettle cover; the insulation jacket is coated on the outside of the kettle body, the liquid inlet end of the insulation jacket is arranged at the lower end, and the liquid outlet end is arranged at the upper end at the diagonal position.

[0012] Furthermore, the feed port includes a solid feed port and a liquid feed port, and the liquid feed port is provided with a flow regulating valve.

[0013] The solid feed port is used to add solid reactants, such as polyformaldehyde that needs to be added in multiple batches; the liquid feed port is used to add liquid feed, and the addition speed is controlled by a flow control valve.

[0014] Furthermore, the agitator includes a stirring rod driven to rotate by the driving motor and a stirring paddle connected to the stirring rod; the stirring rod is a sleeve structure, having a liquid inlet cavity and a liquid outlet cavity with coaxial center lines; the stirring paddle is a hollow structure, the liquid inlet end is connected to the liquid inlet cavity of the stirring rod, and the liquid outlet end is connected to the liquid outlet cavity of the stirring rod.

[0015] The liquid inlet cavity of the stirring rod, the hollow structure of the stirring paddle, and the liquid outlet cavity of the stirring rod constitute the liquid inlet and outlet circulation channel of the stirrer, and heat is exchanged with the system while stirring in the kettle.

[0016] Furthermore, a mounting seat is fixed on the outer side of the top of the kettle body; the upper end of the stirring rod passes through the mounting seat and is connected to the mounting seat through a rotating bearing; a gear ring is provided on the outer side wall of the upper end of the stirring rod; the driving motor is fixed on the mounting seat, and the output end of the driving motor is provided with a gear meshing with the gear ring.

[0017] The drive motor starts, and its output end drives the gear to rotate, which then engages with the ring gear, and the ring gear drives the stirring rod to rotate.

[0018] Furthermore, the top of the upper end of the stirring rod is connected to the dual-channel rotary joint; the liquid inlet chamber of the stirring rod is connected to the liquid inlet channel of the rotating side of the dual-channel rotary joint, and the liquid outlet chamber of the stirring rod is connected to the liquid outlet channel of the rotating side of the dual-channel rotary joint; the liquid inlet channel of the fixed side of the dual-channel rotary joint is connected to the liquid outlet end of the heat exchange medium circulation supply device through a pipeline, and the liquid outlet channel of the fixed side of the dual-channel rotary joint is connected to the liquid inlet end of the heat exchange medium circulation supply device through a pipeline; the fixed side of the dual-channel rotary joint is fixed to the mounting seat through a support frame.

[0019] The liquid outlet end of the external heat exchange medium circulation supply device, the liquid inlet channel on the fixed side of the double-channel rotary joint, the liquid inlet channel on the rotating side of the double-channel rotary joint, the liquid inlet cavity of the stirring rod, the hollow structure of the stirring paddle, the liquid outlet cavity of the stirring rod, the liquid outlet channel on the rotating side of the double-channel rotary joint, the liquid outlet channel on the fixed side of the double-channel rotary joint, and the liquid inlet end of the external heat exchange medium circulation supply device constitute the entire heat exchange medium circulation path.

[0020] Furthermore, the material distribution plate is an annular structure with a cavity inside, and is arranged around the agitator.

[0021] Compared with the prior art, the methanedisulfonic acid methylene ester synthesis device described in the utility model has the following advantages:

[0022] (1) The agitator in the methylene disulfonate synthesis device of the utility model has a stirring function and a heat exchange function. Through a unique inlet and outlet liquid circulation channel structure, connected with a double-channel rotary joint, the heat exchange medium can be circulated in the agitator, and the reaction system can be cooled or heated from the inner cavity of the kettle. In combination with the insulation jacket, simultaneous cooling or heating inside and outside can be achieved, so that the temperature at various places in the kettle can be quickly and uniformly maintained, the temperature difference can be reduced, and the target temperature can be quickly reached;

[0023] (2) The methylene disulfonate synthesis device described in the utility model is designed for the methylene disulfonate synthesis route. A solid feed port, a liquid feed port, and a dripping pipe are provided to enable reactants with different addition requirements to be added from different inlets. For example, sulfur trioxide that needs to be slowly dripped and evenly dispersed can be added from the dripping pipe to optimize the reaction process and reaction effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0025] Figure 1 This is a schematic diagram of the internal structure of the methylene disulfonate synthesis device described in an embodiment of the utility model;

[0026] Figure 2 This is a schematic structural diagram of the methanedisulfonic acid methylene ester synthesis device described in an embodiment of the utility model.

[0027] Description of reference numerals:

[0028] 1- kettle body, 2- stirring and temperature-averaging component, 3- dripping tube, 4- solid feeding port, 5- exhaust port, 6- pressure gauge, 7- temperature detector, 8- discharge port, 9- insulation jacket, 10- liquid feeding port, 11- driving motor, 12- dual-channel rotary joint, 13- stirring rod, 14- stirring paddle, 15- liquid inlet chamber, 16- liquid outlet chamber, 17- mounting seat, 18- gear ring, 19- gear, 20- support frame, 21- injection pipe, 22- material-averaging plate, 23- discharge nozzle. DETAILED DESCRIPTION

[0029] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 an indirect connection 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 the present invention can be understood by specific circumstances.

[0032] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0033] like Figure 1 and 2 As shown, a methylene disulfonate synthesis device comprises a kettle body 1, a stirring and temperature-averaging component 2, and a dripping pipe 3;

[0034] The top of the kettle body 1 is provided with a solid feeding port 4, a liquid feeding port 10, an exhaust port 5 and a pressure gauge 6 connected with its inner cavity, the inner cavity is provided with a temperature detector 7, the bottom is provided with a discharge port 8, and the outer wall is covered with a heat preservation jacket 9; the kettle body 1 includes a kettle body and a kettle cover detachably mounted on the top of the kettle body; the solid feeding port 4, the liquid feeding port 10, the exhaust port 5 and the pressure gauge 6 are all fixed on the kettle cover; the liquid feeding port 10 is provided with a flow regulating valve; the heat preservation jacket 9 is covered on the outer side of the kettle body, the liquid inlet end of the heat preservation jacket 9 is arranged at the lower end, and the liquid outlet end is arranged at the upper end at the diagonal position;

[0035] The stirring and temperature-averaging assembly 2 includes an agitator, a driving motor 11 and a dual-channel rotary joint 12; the agitator includes a stirring rod 13 whose lower end extends into the inner cavity of the kettle body 1 and a stirring paddle 14 connected to the lower end of the stirring rod 13; the stirring rod 13 is a sleeve structure, having a liquid inlet cavity 15 and a liquid outlet cavity 16 with coaxial center lines; the stirring paddle 14 is a hollow structure, the liquid inlet end is connected to the liquid inlet cavity 15 of the stirring rod 13, and the liquid outlet end is connected to the liquid outlet cavity 16 of the stirring rod 13, the liquid inlet cavity 15 of the stirring rod 13, the hollow structure of the stirring paddle 14, and the liquid outlet cavity 16 of the stirring rod 13 constitute the liquid inlet and outlet circulation channel of the agitator; a mounting seat 17 is fixed to the outer side of the top of the kettle body 1, the upper end of the stirring rod 13 passes through the mounting seat 17, and is connected to the mounting seat 17 through a rotary bearing; the upper end of the stirring rod 13 A gear ring 18 is provided on the outer side wall of the end, the driving motor 11 is fixed on the mounting seat 17, and a gear 19 meshing with the gear ring 18 is provided on the output end of the driving motor 11; the top of the upper end of the stirring rod 13 is connected to the dual-channel rotary joint 12, the liquid inlet chamber 15 of the stirring rod 13 is connected to the liquid inlet channel of the rotating side of the dual-channel rotary joint 12, and the liquid outlet chamber 16 of the stirring rod 13 is connected to the liquid outlet channel of the rotating side of the dual-channel rotary joint 12; the liquid inlet channel of the fixed side of the dual-channel rotary joint 12 is connected to the liquid outlet end of the heat exchange medium circulation supply device through a pipeline, and the liquid outlet channel of the fixed side of the dual-channel rotary joint 12 is connected to the liquid inlet end of the heat exchange medium circulation supply device through a pipeline; the fixed side of the dual-channel rotary joint 12 is fixed to the mounting seat 17 through a support frame 20;

[0036] The dripping pipe 3 includes a feeding pipe 21 connected to the inner cavity of the kettle body 1 and provided with a flow regulating valve arranged on the top of the kettle body 1, a material distribution plate 22 connected to the lower end of the feeding pipe 21 and suspended in the inner cavity of the kettle body 1, and a plurality of discharge nozzles 23 evenly distributed on the lower end surface of the material distribution plate 22; the material distribution plate 22 is an annular structure with a cavity inside, and is arranged around the agitator.

[0037] The working process of the methylene disulfonate synthesis device described in the utility model is as follows:

[0038] Methanesulfonyl chloride is added into the kettle body 1 through the liquid feeding port 10, and heat medium liquid is introduced into the heat-insulating jacket 9 and the stirring and temperature-averaging component 2. The heat medium liquid enters the liquid inlet cavity 15 of the stirring rod 13 through the liquid inlet channel on the fixed side of the dual-channel rotary joint 12 and the liquid inlet channel on the rotating side of the dual-channel rotary joint 12, and then enters the hollow structure of the stirring paddle 14, and then enters the liquid outlet cavity 16 of the stirring rod 13, and enters the liquid outlet channel on the rotating side of the dual-channel rotary joint 12 and the liquid outlet channel on the fixed side of the dual-channel rotary joint 12. The entire circulation path of the heat exchange medium is formed, and the temperature is raised to the reaction temperature under the joint action of the insulation jacket 9 and the stirring and temperature-averaging component 2; then sulfur trioxide is slowly and evenly dispersed into the kettle body 1 through the drip tube 3, and after the reaction is completed, the temperature is kept to obtain an intermediate reaction liquid; a refrigerant liquid is introduced into the insulation jacket 9 and the stirring and temperature-averaging component 2 to cool it down, cyclohexane is added through the liquid feeding port 10, and the temperature is lowered again, and polyformaldehyde is added in batches through the solid feeding port 4, and the reaction temperature is controlled at the same time, and the temperature is kept to obtain a reaction completion liquid.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A methylene methane disulfonate synthesis device, characterized in that: include: A kettle body, wherein the top of the kettle body is provided with a feeding port, an exhaust port and a pressure gauge connected to the inner cavity thereof, the inner cavity is provided with a temperature detector, the bottom is provided with a discharge port, and the outer wall is covered with a heat-insulating jacket; A stirring and temperature-averaging component, the stirring and temperature-averaging component comprises a stirrer, a drive motor and a dual-channel rotary joint; the lower end of the stirrer extends into the inner cavity of the kettle body, and the upper end is connected to the output end of the drive motor disposed on the outside of the kettle body; the stirrer is a hollow structure and is provided with an inlet and outlet liquid circulation channel; one channel of the dual-channel rotary joint is connected to the liquid inlet end of the inlet and outlet liquid circulation channel, and the other channel is connected to the liquid outlet end of the inlet and outlet liquid circulation channel; the dual-channel rotary joint is externally connected to a heat exchange medium circulation supply device; The dripping pipe includes a feeding pipe connected to the inner cavity of the kettle body and provided with a flow regulating valve arranged on the top of the kettle body, a material balancing plate connected to the lower end of the feeding pipe and suspended in the inner cavity of the kettle body, and a plurality of discharge nozzles evenly distributed on the lower end surface of the material balancing plate.

2. The methylene methanedisulfonate synthesis device according to claim 1, characterized in that: The kettle body includes a kettle body and a kettle cover detachably mounted on the top of the kettle body; the feeding port, the exhaust port and the pressure gauge are all fixed on the kettle cover; the insulation jacket is coated on the outside of the kettle body, the liquid inlet end of the insulation jacket is arranged at the lower end, and the liquid outlet end is arranged at the upper end at the diagonal position.

3. The methylene methanedisulfonate synthesis device according to claim 1, characterized in that: The feeding port comprises a solid feeding port and a liquid feeding port, and a flow regulating valve is arranged on the liquid feeding port.

4. The methylene disulfonate synthesis device according to claim 1, characterized in that: The stirrer comprises a stirring rod driven to rotate by the driving motor and a stirring paddle connected to the stirring rod; the stirring rod is a sleeve structure, having a liquid inlet cavity and a liquid outlet cavity with coaxial center lines; The stirring paddle is a hollow structure, a liquid inlet end is communicated with the liquid inlet cavity of the stirring rod, and a liquid outlet end is communicated with the liquid outlet cavity of the stirring rod.

5. The methylene methanedisulfonate synthesis device according to claim 4, characterized in that: A mounting seat is fixed on the outer side of the top of the kettle body; the upper end of the stirring rod passes through the mounting seat and is connected to the mounting seat through a rotating bearing; a gear ring is provided on the outer side wall of the upper end of the stirring rod; the driving motor is fixed on the mounting seat, and the output end of the driving motor is provided with a gear meshing with the gear ring.

6. The methylene methanedisulfonate synthesis device according to claim 5, characterized in that: The top of the upper end of the stirring rod is connected to the dual-channel rotary joint; the liquid inlet chamber of the stirring rod is connected to the liquid inlet channel of the rotating side of the dual-channel rotary joint, and the liquid outlet chamber of the stirring rod is connected to the liquid outlet channel of the rotating side of the dual-channel rotary joint; the liquid inlet channel of the fixed side of the dual-channel rotary joint is connected to the liquid outlet end of the heat exchange medium circulation supply device through a pipeline, and the liquid outlet channel of the fixed side of the dual-channel rotary joint is connected to the liquid inlet end of the heat exchange medium circulation supply device through a pipeline; the fixed side of the dual-channel rotary joint is fixed to the mounting seat through a support frame.

7. The methylene methanedisulfonate synthesis device according to claim 1, characterized in that: The material distribution plate is an annular structure with a cavity inside, and is arranged around the stirrer.

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