Continuous production device for lithium hexafluorophosphate

Abstract

The utility model belongs to the technical field of lithium hexafluorophosphate production, and discloses a lithium hexafluorophosphate continuous production device which comprises a reactor, a mixer, a first container, a second container, a product receiving tank and a circulating assembly, and the mixer is arranged at the input end of the reactor; the first container and the second container are connected with the input end of the reactor; the input end of the product receiving tank is connected with the output end of the reactor; the circulating assembly comprises a condenser and a circulating pump, the condenser is communicated with the interior of the reactor and connected with the circulating pump, and the output end of the circulating pump is connected with the mixer. Thus, the condenser can cool the mixed material in the reactor so as to control the reaction rate and the reaction temperature, and the circulating pump can convey the cooled material into the mixer again for continuous reaction, so that continuous production of lithium hexafluorophosphate is realized, and the production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to lithium hexafluorophosphate production technical field especially relates to a lithium hexafluorophosphate continuous production device. BACKGROUND

[0002] Lithium hexafluorophosphate is the key raw material of lithium ion battery electrolyte, because it has many excellent characteristics, such as high specific energy, small self-discharge, long cycle life, fast charge and discharge, excellent high-low temperature performance, large discharge power, no memory effect, etc., is widely used in 3C (Computer, Communication, Consumer Electronics, computer, communication equipment, consumer electronics), power battery, energy storage and other fields.

[0003] In the prior art, lithium hexafluorophosphate production process is usually intermittent production method, the reaction equipment of intermittent production method occupies large area, and the reaction is unstable, and the use amount of solvent and raw material is large, so it is difficult to control the reaction rate and temperature, and there are problems of complex equipment, low production efficiency, low safety performance and the like. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a lithium hexafluorophosphate continuous production device to solve the problems of complex equipment, low production efficiency and low safety performance of lithium hexafluorophosphate intermittent production process.

[0005] To achieve this purpose, the utility model adopts the following technical scheme:

[0006] A lithium hexafluorophosphate continuous production device, comprising: a reactor and a mixer, the mixer is arranged at the input end of the reactor; a first container and a second container, the first container and the second container are connected with the input end of the reactor; a product receiving groove, the input end of the product receiving groove is connected with the output end of the reactor; a circulating assembly, the circulating assembly comprises a condenser and a circulating pump, the condenser is communicated with the inside of the reactor, the condenser is connected with the circulating pump, and the output end of the circulating pump is connected with the mixer.

[0007] Preferably, the reactor comprises a jacket, the jacket is connected with an input pipe and an output pipe, and is used for conveying refrigerant into the jacket, the input pipe is arranged at the bottom of the jacket, and the output pipe is arranged at the top of the jacket.

[0008] Preferably, the reactor further comprises a circulating pipe, the circulating pipe is communicated with the inside of the reactor, one end of the circulating pipe, away from the reactor, is connected with the condenser, and the input pipe, the circulating pipe and the output pipe are arranged in sequence along the direction from the input end to the output end of the reactor.

[0009] As a preference, the input end cross-sectional area of the reactor is smaller than the output end cross-sectional area of the reactor.

[0010] As a preference, the reactor further comprises an upper section, a middle section and a lower section, the middle section is connected with the upper section and the lower section at two ends respectively, one end of the lower section away from the middle section is connected with the first container and the second container, one end of the upper section away from the middle section is connected with the product receiving groove, and the cross-sectional area of the upper section is larger than that of the lower section.

[0011] As a preference, the input pipe is arranged corresponding to the position of the lower section, the circulation pipe is arranged corresponding to the position of the middle section, and the output pipe is arranged corresponding to the position of the upper section.

[0012] As a preference, the lithium hexafluorophosphate continuous production device further comprises a back pressure valve arranged between the output end of the reactor and the input end of the product receiving groove.

[0013] As a preference, the lithium hexafluorophosphate continuous production device further comprises a detection assembly, and the detection assembly comprises a pressure transmitter connected with the output end of the reactor.

[0014] As a preference, the detection assembly further comprises a first temperature transmitter, a second temperature transmitter and a third temperature transmitter arranged in sequence along the length direction of the reactor, and the first temperature transmitter, the second temperature transmitter and the third temperature transmitter are all connected with the reactor.

[0015] As a preference, the first container is connected with a first metering pump, the input end of the first metering pump is connected with the output end of the first container, and the output end of the first metering pump is connected with the input end of the reactor; and / or, the second container is connected with a second metering pump, the input end of the second metering pump is connected with the output end of the second container, and the output end of the second metering pump is connected with the input end of the reactor.

[0016] The beneficial effects of the utility model are as follows:

[0017] A lithium hexafluorophosphate continuous production device comprises a reactor, a mixer, a first container, a second container, a product receiving groove and a circulation assembly, the mixer is arranged at the input end of the reactor, the first container and the second container are connected with the input end of the reactor, the input end of the product receiving groove is connected with the output end of the reactor, the circulation assembly comprises a condenser and a circulation pump, the condenser is communicated with the inside of the reactor, the condenser is connected with the circulation pump, and the output end of the circulation pump is connected with the mixer.

[0018] Thus, the synthetic liquid and liquid hydrogen fluoride can be fully mixed and reacted in the mixer and the reactor, the mixed material can be cooled by the condenser and circulated and delivered to the mixer by the circulating pump, the reaction rate and temperature are more controllable, the production efficiency and safety performance are improved, the continuous production of lithium hexafluorophosphate is realized, the equipment structure is more simplified, and the land occupation area is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a structural schematic view of a lithium hexafluorophosphate continuous production device in an embodiment of the utility model.

[0020] In the drawings:

[0021] 1, reactor; 11, jacket; 111, input pipe; 112, output pipe; 12, discharge pipe; 13, circulating pipe; 14, upper section; 15, middle section; 16, lower section; 2, mixer; 3, first container; 31, first metering pump; 4, second container; 41, second metering pump; 5, product receiving tank; 6, circulating assembly; 61, condenser; 62, circulating pump; 7, back pressure valve; 8, detection assembly; 81, pressure transmitter; 82, first temperature transmitter; 83, second temperature transmitter; 84, third temperature transmitter. DETAILED DESCRIPTION

[0022] The utility model will be further described in detail below in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the utility model, and not limited to the utility model. In addition, it should be noted that, in order to facilitate the description, only the part related to the utility model is shown in the drawings, not all structures.

[0023] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0024] In the utility model, unless another definite provision and limitation, first feature is in second feature "on" or "under" can include that first and second features are in direct contact, also can include that first and second features are not in direct contact but contact through other feature between them. Moreover, first feature is in second feature "on", "above" and "upper surface" include that first feature is in second feature directly above and obliquely above, or just indicate that first feature horizontal height is higher than second feature. First feature is in second feature "under", "below" and "under surface" include that first feature is in second feature directly below and obliquely below, or just indicate that first feature horizontal height is less than second feature.

[0025] In the description of the embodiment, the terms "upper", "lower", "right", "left", "horizontal", "vertical", and "radial" refer to the orientation or position shown in the drawings, which are for convenience and simplification of description and operation only, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be construed as limiting the present utility model. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0026] Referring to Figure 1 The utility model provides a kind of lithium hexafluorophosphate continuous production device, including reactor 1, mixer 2, first container 3, second container 4, product receiving tank 5 and circulating assembly 6, mixer 2 is set to the input end of reactor 1;First container 3, second container 4 are connected with the input end of reactor 1;The input end of product receiving tank 5 is connected with the output end of reactor 1;Circulating assembly 6 includes condenser 61 and circulating pump 62, condenser 61 is communicated with the inside of reactor 1, condenser 61 is connected with circulating pump 62, the output end of circulating pump 62 is connected with mixer 2.

[0027] In the embodiment, the inner container of the reactor 1 is made of stainless steel material to avoid corrosion of the material to the inner container of the reactor 1. The reactor 1 is a vertical structure, that is, the reactor 1 is vertically arranged. The mixer 2 is connected with the output end of the second container 4 through a pipeline, and the first container 3 is connected with the reactor 1 through a pipeline.

[0028] Further, the condenser 61 is a shell-and-tube condenser 61. The tubes (not shown in the figure) are made of silicon carbide material, and the upper and lower heads of the tubes are made of stainless steel material. The condenser 61 includes a tube layer (not shown in the figure) and a shell layer (not shown in the figure). The tube layer is used to pass the material, and the shell layer is used to pass the refrigerant. The tube layer inlet of the condenser 61 is communicated with the inside of the reactor 1 through a stainless steel pipeline, which is used to convey the mixed material in the reactor 1 to the inside of the tube layer. The tube layer outlet of the condenser 61 is connected with the input end of the circulating pump 62 through a stainless steel pipeline. The circulating pump 62 is a magnetic drive pump. The output end of the circulating pump 62 is connected with the mixer 2 through a stainless steel pipeline.

[0029] It should be noted that the first container 3 stores the synthetic liquid, the second container 4 stores the liquid hydrogen fluoride, the synthetic liquid is transported to the inside of the reactor 1 and reaches a height that can enter the condenser 61, and then the liquid hydrogen fluoride is transported to the mixer 2, so that the synthetic liquid and the liquid hydrogen fluoride in the mixer 2 are fully mixed and reacted to generate lithium hexafluorophosphate products and tail gas, which can be transported to the product receiving tank 5 through the output end of the reactor 1. The mixture in the reactor 1 is cooled by the condenser 61 and then transported to the mixer 2 by the circulating pump 62 for continuous reaction.

[0030] In this way, the synthetic liquid and the liquid hydrogen fluoride are fully mixed and reacted in the mixer 2, so that the mixture transported into the reactor 1 can be stably and continuously reacted to generate lithium hexafluorophosphate, and the mixture is cooled by the condenser 61 and then circulated to the mixer 2 by the circulating pump 62, which facilitates the control of the temperature of the material during the reaction, thereby improving the production efficiency and safety performance, and the structure is more simplified, and the floor area of the lithium hexafluorophosphate continuous production device is reduced.

[0031] It can be understood that the specific type of the circulating pump 62 can also be flexibly adjusted according to actual needs, and will not be enumerated here; the pipeline connected with the condenser 61 and the reactor 1 can be provided with a valve to control the transportation of the mixture, and other pipelines can also be provided with a valve, the valve in contact with the material can adopt a stainless steel ball valve structure to avoid corrosion of the valve by the material, and the valve in contact with the refrigerant can adopt a carbon steel ball valve structure.

[0032] Referring to Figure 1 In some embodiments, the reactor 1 includes a jacket 11 connected with an input pipe 111 and an output pipe 112 for transporting refrigerant into the jacket 11, the input pipe 111 is arranged at the bottom of the jacket 11 (i.e., one end of the jacket 11 facing the input end of the reactor 1), and the output pipe 112 is arranged at the top of the jacket 11 (i.e., one end of the jacket 11 facing the output end of the reactor 1).

[0033] In this embodiment, the jacket 11 is made of carbon steel material, the jacket 11 is internally passed through the refrigerant, and the inside of the jacket 11 is not communicated with the inside of the reactor 1, the input pipe 111 is located below the output pipe 112, and the input pipe 111 and the output pipe 112 are arranged on the side wall of the jacket 11, so as to facilitate the refrigerant to fully cool the inside of the reactor 1; the reactor 1 includes a discharge pipe 12 arranged at the output end of the reactor 1, and the discharge pipe 12 is connected with the product receiving tank 5 through a pipeline.

[0034] Thus, the refrigerant in the jacket 11 can timely transport the heat generated by the material in the reactor 1 to the outside, realize the control of the reaction temperature, reduce the residence time of the material, make the reaction more stable, facilitate the control of the reaction rate and temperature, and part of the mixed material can further enter the mixer 2 after being controlled by the condenser 61, so as to realize the continuous production of lithium hexafluorophosphate, improve the production efficiency and safety performance.

[0035] It can be understood that the material of the jacket 11 can also be the same as that of the reactor 1, and the embodiment does not limit this.

[0036] Referring to Figure 1 In some embodiments, the reactor 1 further comprises a circulating pipe 13, the circulating pipe 13 is in communication with the inside of the reactor 1, and the end of the circulating pipe 13 away from the reactor 1 is connected with the condenser 61. In the direction from the input end to the output end of the reactor 1 (i.e. from the bottom to the top of the reactor 1), the input pipe 111, the circulating pipe 13 and the output pipe 112 are arranged in sequence.

[0037] In the embodiment, the circulating pipe 13 is arranged at the middle part of the reactor 1, the input pipe 111 is arranged at the bottom of the reactor 1, and the output pipe 112 is arranged at the top side wall of the reactor 1. The circulating pipe 13 is connected with the input end of the condenser 61, so that the mixed material in the reactor 1 enters the pipe layer of the condenser 61.

[0038] Thus, the circulating pipe 13 can transport the mixed material in the middle part of the reactor 1 to the condenser 61, and then recycle to the mixer 2 after being cooled by the condenser 61, so as to realize the overall temperature control of the material in the reactor 1, make the reaction more stable, facilitate the control of the reaction rate and temperature by the operator, improve the production efficiency, and make the continuous production process of lithium hexafluorophosphate more safe and stable.

[0039] It can be understood that the setting position of the circulating pipe 13 is set according to the liquid level of the material in the reactor 1, and the liquid mixed material can be transported to the condenser 61 through the circulating pipe 13, which will not be described here.

[0040] Referring to Figure 1 In some embodiments, the cross-sectional area of the input end of the reactor 1 is smaller than that of the output end of the reactor 1.

[0041] Thus, the cross-sectional area of the input end of the reactor 1 is smaller, which is conducive to the liquid mixing reaction, and the cross-sectional area of the output end is larger, which can facilitate the discharge of the gas with high temperature generated in the reaction process, make the reaction more stable, improve the production efficiency, realize the continuous production of lithium hexafluorophosphate, and the volume of the input end of the reactor 1 is smaller, which can reduce the floor area, make the overall structure of the lithium hexafluorophosphate continuous production device more compact and simple.

[0042] Referring to Figure 1 In some embodiments, the reactor 1 further comprises an upper section 14, a middle section 15 and a lower section 16, the middle section 15 is connected with the upper section 14 and the lower section 16 at two ends respectively, the lower section 16 is connected with the first container 3 and the second container 4 at one end away from the middle section 15, the upper section 14 is connected with the product receiving groove 5 at one end away from the middle section 15, and the cross-sectional area of the upper section 14 is greater than that of the lower section 16. Further, in some embodiments, the input pipe 111 is arranged corresponding to the position of the lower section 16, the circulation pipe 13 is arranged corresponding to the position of the middle section 15, and the output pipe 112 is arranged corresponding to the position of the upper section 14.

[0043] In the reactor 1, the end of the upper section 14 away from the middle section 15 is the output end of the reactor 1, the end of the lower section 16 away from the middle section 15 is the input end of the reactor 1, and the cross-sectional area of the middle section 15 gradually increases in the direction from the bottom to the top of the reactor 1.

[0044] In this way, the coolant enters the jacket 11 through the input pipe 111 arranged in the lower section 16, and can cool the mixed material in the lower section 16. The mixed material releases heat during the reaction process, and the mixed material with high temperature in the middle section 15 can enter the condenser 61 through the circulation pipe 13 for further cooling, and be transported to the mixer 2 by the circulation pump 62 for mixing and reaction, so as to facilitate the control of the reaction rate and the stability of the reaction, reduce the residence time and adjustment time in the production process, and reduce the labor cost and the equipment operation cost, thereby reducing the production cost. Moreover, the jacket 11 and the condenser 61 can adjust the temperature of the material, thereby improving the production efficiency.

[0045] It can be understood that the relative positions of the input pipe 111, the output pipe 112 and the circulation pipe 13 on the reactor 1 can be flexibly adjusted according to the actual production situation, so that the coolant in the jacket 11 circulates and flows, and the mixed material in the reactor 1 enters the condenser 61 through the circulation pipe 13. Details are not described herein.

[0046] Referring to Figure 1 In some embodiments, the lithium hexafluorophosphate continuous production device further comprises a back pressure valve 7 arranged between the output end of the reactor 1 and the input end of the product receiving groove 5. In this embodiment, the back pressure valve 7 is a full-automatic back pressure valve 7 made of stainless steel.

[0047] In this way, by arranging the back pressure valve 7, the required pressure can be maintained in the reactor 1, so that the reaction in the reactor 1 can be carried out at a suitable pressure, thereby improving the stability of the reaction and the production efficiency, and facilitating the collection of the produced lithium hexafluorophosphate, thereby improving the safety performance of the lithium hexafluorophosphate continuous production device.

[0048] It can be understood that the specific type of back pressure valve 7 can be adjusted according to actual conditions, which will not be repeated here.

[0049] Referring to Figure 1 In some embodiments, the lithium hexafluorophosphate continuous production device further comprises a detection assembly 8, and the detection assembly 8 comprises a pressure transmitter 81 connected with the output end of the reactor 1.

[0050] In this embodiment, the pressure transmitter 81 is arranged at the top end of the reactor 1, and the lithium hexafluorophosphate continuous production device further comprises an electric control system (not shown in the figure), and the back pressure valve 7 and the pressure transmitter 81 are connected with the electric control system, so that the opening and closing of the back pressure valve 7 can be adjusted according to the internal pressure of the reactor 1 detected by the pressure transmitter 81, so as to control the internal pressure of the main reactor 1.

[0051] In this way, the pressure transmitter 81 and the back pressure valve 7 are connected through the electric control system, which facilitates real-time adjustment of the opening and closing of the back pressure valve 7 according to the internal pressure of the reactor 1 and the reaction stage of the material, improves the flexibility of production, facilitates control of the reaction rate, reduces manual intervention, reduces production cost, improves production efficiency and safety performance of the lithium hexafluorophosphate continuous production device.

[0052] Referring to Figure 1 In some embodiments, the detection assembly 8 further comprises a first temperature transmitter 82, a second temperature transmitter 83 and a third temperature transmitter 84 arranged in sequence along the length direction of the reactor 1, and the first temperature transmitter 82, the second temperature transmitter 83 and the third temperature transmitter 84 are connected with the reactor 1.

[0053] In this embodiment, the first temperature transmitter 82 is arranged at one end of the lower section 16 away from the middle section 15, the second temperature transmitter 83 is arranged at one end of the middle section 15 facing the lower section 16, and the third temperature transmitter 84 is arranged at one end of the upper section 14 away from the middle section 15, and the first temperature transmitter 82, the second temperature transmitter 83 and the third temperature transmitter 84 are connected with the electric control system.

[0054] In this way, the first temperature transmitter 82, the second temperature transmitter 83 and the third temperature transmitter 84 can detect the temperature of the lower section 16, the middle section 15 and the upper section 14 of the reactor 1 respectively, so as to control the reaction rate and temperature, make the continuous production of lithium hexafluorophosphate more controllable, and improve the production efficiency.

[0055] It can be understood that the arrangement positions of the first temperature transmitter 82, the second temperature transmitter 83 and the third temperature transmitter 84 can be adjusted according to actual production.

[0056] Referring to Figure 1In some embodiments, the first container 3 is connected with a first metering pump 31, the input end of the first metering pump 31 is connected with the output end of the first container 3, the output end of the first metering pump 31 is connected with the input end of the reactor 1, the second container 4 is connected with a second metering pump 41, the input end of the second metering pump 41 is connected with the output end of the second container 4, and the output end of the second metering pump 41 is connected with the input end of the reactor 1.

[0057] The first metering pump 31 is made of stainless steel, the input end of the first metering pump 31 is connected with the first container 3 through a stainless steel pipeline, the output end of the first metering pump 31 is connected with the lower section 16 of the reactor 1 through a stainless steel pipeline, the input end of the second metering pump 41 is connected with the second container 4 through a stainless steel pipeline, and the output end of the second metering pump 41 is connected with the mixer 2 through a stainless steel pipeline. The first metering pump 31 and the second metering pump 41 are both connected with an electric control system.

[0058] In this way, the first metering pump 31 and the second metering pump 41 can respectively control the feeding amount of the synthesis liquid and the liquid hydrogen fluoride, and can adjust the feeding amount according to the temperature and pressure inside the reactor 1 under the control of the electric control system, so as to realize the automatic continuous production of lithium hexafluorophosphate, reduce the residence time and adjustment time in the production process, and reduce the need for manual intervention and equipment adjustment, thereby reducing the labor cost and equipment operation cost, improving the production efficiency, and improving the stability and consistency of the product quality.

[0059] It should be noted that in the present embodiment, the electric control system sends control signals to the first metering pump 31 and the second metering pump 41 through the signals fed back by the pressure transmitter 81, the first temperature transmitter 82, the second temperature transmitter 83 and the third temperature transmitter 84, which is a prior art and will not be described here.

[0060] The use method of the lithium hexafluorophosphate continuous production device is as follows:

[0061] The mixer 2, the first container 3, the second container 4, the product receiving groove 5, the circulation assembly 6 and the back pressure valve 7 are assembled to the reactor 1 through bolts or flanges, and the pipelines after connection are tested for pressure to ensure that there is no leakage.

[0062] According to the process requirement, the feed flow of the first metering pump 31 and the second metering pump 41 is set, and according to the required reactor 1 pressure of the process requirement, the pressure parameter of the back pressure valve 7 is set, the synthetic liquid is delivered into the reactor 1 through the first metering pump 31, so that the liquid level inside the reactor 1 is enough for circulation (that is, the liquid level inside the reactor 1 is higher than the height of the circulation pipe 13), the circulation pump 62 is opened to make the synthetic liquid start to circulate, and the refrigerant is delivered into the jacket 11 through the input pipe 111, the temperature inside the reactor 1 is detected through the first temperature transmitter 82, the second temperature transmitter 83 and the third temperature transmitter 84, the first metering pump 31 and the second metering pump 41 are opened, the synthetic liquid and the liquid hydrogen fluoride are mixed and continuously reacted in the mixer 2 and the bottom of the reactor 1, and the reacted product and the tail gas are all collected into the product receiving tank 5 through the back pressure valve 7.

[0063] Obviously, the above embodiments of the present application are merely examples for clear illustration of the present application, and are not intended to limit the embodiments of the present application. For those skilled in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present application. Here, it is unnecessary and impossible to enumerate all the embodiments. Any modification, equivalent substitution and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A continuous production apparatus of lithium hexafluorophosphate, characterized by, The application relates to a lithium hexafluorophosphate continuous production device. The lithium hexafluorophosphate continuous production device comprises a reactor (1) and a mixer (2), the mixer (2) is arranged at the input end of the reactor (1); a first container (3) and a second container (4) are connected with the input end of the reactor (1); a product receiving groove (5) is connected with the output end of the reactor (1); a circulating assembly (6) is arranged, the circulating assembly (6) comprises a condenser (61) and a circulating pump (62), the condenser (61) is communicated with the inside of the reactor (1), the condenser (61) is connected with the circulating pump (62), and the output end of the circulating pump (62) is connected with the mixer (2). The reactor (1) comprises a jacket (11), an input pipe (111) and an output pipe (112) are connected with the jacket (11) and used for conveying refrigerant into the jacket (11), the input pipe (111) is arranged at the bottom of the jacket (11), and the output pipe (112) is arranged at the top of the jacket (11). The reactor (1) further comprises a circulating pipe (13), the circulating pipe (13) is communicated with the inside of the reactor (1), one end of the circulating pipe (13) away from the reactor (1) is connected with the condenser (61), and the input pipe (111), the circulating pipe (13) and the output pipe (112) are arranged in sequence along the direction from the input end to the output end of the reactor (1). The cross-sectional area of the input end of the reactor (1) is smaller than that of the output end of the reactor (1).

2. The lithium hexafluorophosphate continuous production apparatus according to claim 1, characterized by, The reactor (1) further comprises an upper section (14), a middle section (15) and a lower section (16), the middle section (15) is connected with the upper section (14) and the lower section (16) at two ends respectively, one end of the lower section (16) away from the middle section (15) is connected with the first container (3) and the second container (4), one end of the upper section (14) away from the middle section (15) is connected with the product receiving groove (5), and the cross-sectional area of the upper section (14) is larger than that of the lower section (16).

3. The lithium hexafluorophosphate continuous production apparatus according to claim 2, characterized by, The input pipe (111) is arranged at the position corresponding to the lower section (16), the circulating pipe (13) is arranged at the position corresponding to the middle section (15), and the output pipe (112) is arranged at the position corresponding to the upper section (14).

4. The lithium hexafluorophosphate continuous production apparatus according to claim 3, characterized by The lithium hexafluorophosphate continuous production device further comprises a back pressure valve (7), which is arranged between the output end of the reactor (1) and the input end of the product receiving groove (5).

5. The continuous production apparatus of lithium hexafluorophosphate according to claim 3, characterized by The lithium hexafluorophosphate continuous production device further comprises a detection assembly (8), which comprises a pressure transmitter (81) connected with the output end of the reactor (1).

6. The continuous production apparatus of lithium hexafluorophosphate according to claim 5, characterized by ​ 7. The continuous production apparatus of lithium hexafluorophosphate according to any one of claims 1 to 6, characterized by, ​ 8. The continuous production apparatus of lithium hexafluorophosphate according to any one of claims 1 to 6, characterized by, ​ 9. The lithium hexafluorophosphate continuous production apparatus according to claim 8, characterized by The detection assembly (8) further comprises a first temperature transmitter (82), a second temperature transmitter (83) and a third temperature transmitter (84) arranged in sequence along the length direction of the reactor (1), and each of the first temperature transmitter (82), the second temperature transmitter (83) and the third temperature transmitter (84) is connected with the reactor (1).

10. The continuous production apparatus of lithium hexafluorophosphate according to any one of claims 1 to 6, characterized by, The first container (3) is connected with a first metering pump (31), an input end of the first metering pump (31) is connected with an output end of the first container (3), and an output end of the first metering pump (31) is connected with an input end of the reactor (1); and / or the second container (4) is connected with a second metering pump (41), an input end of the second metering pump (41) is connected with an output end of the second container (4), and an output end of the second metering pump (41) is connected with an input end of the reactor (1).

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