Device for continuously crystallizing and drying sodium hexafluorophosphate and using method thereof

Abstract

The invention provides a system for continuously crystallizing and drying sodium hexafluorophosphate, and belongs to the technical field of chemical devices. The device comprises a crystallizer, an intermediate tank, multifunctional integrated equipment, an inert gas replacement device and a finished product tank which are sequentially communicated through pipelines, the crystallizer is provided with a first vibrator and can adjust the angle of the pipeline; the multifunctional integrated equipment is pipeline type multifunctional integrated equipment which is provided with a second vibrator and has filtering and drying functions; the inert gas replacement device is used for replacing gas in the multifunctional integrated equipment and drying materials in the multifunctional integrated equipment; and the finished product tank is communicated with the multifunctional integrated equipment and is used for storing the materials treated by the multifunctional integrated equipment. Continuous operation can be achieved through the synthesis mother liquor pump and the multi-section reactor (the crystallizer and the multifunctional integrated equipment).

Description

Technical Field

[0001] The invention relates to the technical field of chemical devices, and in particular to a system for continuous crystallization and drying of sodium hexafluorophosphate and a use method thereof. Background Art

[0002] In the production process of sodium hexafluorophosphate, the synthesis of sodium hexafluorophosphate solution requires a crystallization process to obtain solid salt. Most of them are operated in intermittent kettles. Intermittent operation has batch differences, product quality has batch fluctuations, local differences in the temperature of the crystallization kettle wall, the problem of kettle wall sticking to the kettle, and the problem of long feeding, heating and cooling process time, resulting in low production efficiency. Reactors generally have a single function, and the structure of multifunctional equipment is complex and occupies a large area. Summary of the invention

[0003] In view of this, in order to solve the above-mentioned shortcomings of the intermittent kettle operation in the production process of sodium hexafluorophosphate in the prior art, on the one hand, the present invention provides a system for continuous crystallization and drying of sodium hexafluorophosphate, which can achieve continuous operation through a crystallizer with a vibrator and a multi-functional all-in-one device, a synthetic mother liquor pump and a multi-stage reactor (crystallizer and multi-functional all-in-one device).

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A sodium hexafluorophosphate continuous crystallization and drying system, comprising a synthetic mother liquor pump, a crystallizer, an intermediate tank, a multifunctional integrated device, an inert gas replacement device and a finished product tank which are sequentially connected through pipelines;

[0006] The crystallizer is a crystallizer with a first vibrator and capable of adjusting the angle of the pipeline;

[0007] The multifunctional all-in-one device is a pipeline-type multifunctional all-in-one device with a second vibrator and filtering and drying functions;

[0008] The inert gas replacement device is used to replace the gas in the multifunctional all-in-one device and dry the material in the multifunctional all-in-one device;

[0009] The finished product tank is connected to the multifunctional integrated device and is used to store materials processed by the multifunctional integrated device.

[0010] Preferably, it also includes a raw material tank connected to the crystallizer.

[0011] Preferably, it also includes a mother liquid tank connected to the multifunctional all-in-one device.

[0012] Preferably, a slider is provided in the crystallizer to control the movement state of the material, control the size of the crystal grains, and prevent the material from sticking to the wall. The slider has a gap between the slider and the pipe for the material to pass through.

[0013] Preferably, the sliding block is provided with axial and / or normal through holes for allowing materials to pass through.

[0014] Preferably, the outer surface of the sliding block has a toothed structure for preventing the material from sticking to the wall.

[0015] Preferably, the crystallizer and the multifunctional integrated device are both provided with jackets for temperature control.

[0016] Preferably, the crystallizer and the jacket outside the multifunctional all-in-one device are both provided with a heat-insulating layer.

[0017] The present invention also provides a method for using the above-mentioned sodium hexafluorophosphate continuous crystallization and drying system, comprising the following steps:

[0018] 1) Start the crystallizer and send the mother liquor into the crystallizer for crystallization;

[0019] 2) After the crystallization of step 1) is completed, it is sent to the middle tank for stirring;

[0020] 3) Start the multifunctional integrated equipment, and send the material after stirring in the middle tank into the multifunctional integrated equipment for filtration;

[0021] 4) Starting the inert gas replacement device to replace the gas in the multifunctional all-in-one device and to dry the material in the multifunctional all-in-one device;

[0022] 5) After step 4) drying is completed, the material is transported to the finished product tank.

[0023] Preferably, in step 4), the inert gas replacement time is 1-3 hours.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1) Continuous operation can be achieved through the synthesis mother liquor pump and pipeline reactor;

[0026] 2) Both the crystallizer and the multifunctional integrated equipment are preferably of pipeline type, with simple structure, convenient maintenance and few leakage points;

[0027] 3) A slider is set in the crystallizer with a vibrator to control the material stirring effect, the crystal particle size, and the wall scraping to prevent the crystallized material from sticking to the wall, which helps the equipment to discharge the material;

[0028] 4) The multi-stage reactor jacket can be set at different temperatures to ensure the best crystallization effect;

[0029] 5) The inert gas system can ensure that the system is isolated from water and oxygen, and can also dry the material and remove residual HF. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of the present invention;

[0031] In the figure, 1. synthetic mother liquor pump, 2. first flow meter, 3. first vibrator, 4. crystallizer, 5. thermometer, 6. second flow meter, 7. freezing liquid pump, 8. intermediate tank, 9. second vibrator, 10. multifunctional all-in-one equipment, 11. mother liquor tank, 12. finished product tank. DETAILED DESCRIPTION

[0032] like Figure 1 As shown, the present invention provides a system for continuous crystallization and drying of sodium hexafluorophosphate, comprising a synthetic mother liquor pump 1, a crystallizer 4, an intermediate tank 8, a multifunctional integrated device 10, an inert gas replacement device and a finished product tank 12 which are sequentially connected through pipelines;

[0033] The crystallizer 4 is a crystallizer with a first vibrator 3 and capable of adjusting the pipe angle;

[0034] The multifunctional all-in-one device 10 is a pipeline-type multifunctional all-in-one device with a second vibrator 9 and filtering and drying functions;

[0035] The inert gas replacement device (preferably nitrogen or argon to ensure that the material is isolated from the air) is used to replace the gas in the multifunctional all-in-one device 10 and dry the material in the multifunctional all-in-one device;

[0036] The finished product tank 12 is connected to the multifunctional integrated device 10 and is used to store materials processed by the multifunctional integrated device 10 .

[0037] In the present invention, the vibration frequency and amplitude of the first vibrator 3 can be adjusted, for example, the frequency is 50 to 260 Hz, and the amplitude is 10 to 150 mm;

[0038] 1. In the present invention, the vibration frequency and amplitude of the second vibrator 9 can be adjusted, for example, the frequency is 30 to 200 Hz, and the amplitude is 15 to 55 mm.

[0039] In the present invention, the crystallizer 4 and the multifunctional integrated device 10 are preferably connected in series in plurality.

[0040] In the present invention, the crystallizer 4 can be selected from a vibration-type multifunctional reactor system disclosed in CN114797743A, which is a pipeline crystallizer, the full text of which is introduced into the present invention, and its specific structure is:

[0041] “A vibrating reciprocating multifunctional reactor system comprises at least one vibrator and at least one reactor body;

[0042] The reactor body has a feed port and a discharge port, and a vibration rod independent of the reactor body is arranged inside the reactor body.

[0043] The reciprocating multifunctional reactor system with vibration provided by the present invention drives the whole reciprocating mechanical vibration of the reactor body through the vibrator, drives the vibrating rod inside the reactor to do reciprocating motion, so that the material in the reactor performs high-speed shear motion, can be used for gas and liquid homogeneous phase reaction, can also be used for gas, liquid, solid (dispersed in liquid) three-phase reaction, can be used for material mixing, absorption, extraction, crystallization and other chemical processes and chemical reactions, and is a multifunctional reactor system;

[0044] The gap between the tube wall of the reactor body and the vibrating rod can be adjusted according to the reaction medium, and the vibration amplitude of the vibrating rod can be adjusted by adjusting the gap between the vibrating rod and the top of the reactor body. The liquid holding capacity of the reactor can be adjusted by adjusting the diameter or structural shape of the vibrating rod.

[0045] In the present invention, a plurality of reactor bodies are connected in series or in parallel to achieve control and amplification of the reaction process.

[0046] In the present invention, a heat exchange jacket with an inlet and an outlet is arranged on the periphery of the reactor body, and the reaction temperature is controlled by the heat-conducting medium in the heat exchange jacket to achieve efficient heat transfer, mass transfer and chemical reaction in the reaction system.

[0047] In the present invention, an annular or spiral guide plate is provided in the heat exchange jacket to achieve uniform flow of the heat transfer medium to uniformly heat the reactor body.

[0048] In the present invention, the heat exchange jacket is provided with a temperature measuring device for detecting the temperature of the heat-conducting medium in the heat exchange jacket, so as to facilitate the control of the heating temperature.

[0049] In the present invention, the reactor body is provided with a measuring device for measuring the temperature and pressure inside the reactor body to achieve temperature and pressure control inside the reactor body, wherein the temperature can be measured by a temperature sensor and the pressure can be measured by a pressure sensor.

[0050] In the present invention, the feed port is connected to a first metering pump and / or a second metering pump, which can be selected according to actual needs. In addition, the discharge port can also be provided with a metering pump according to actual needs.

[0051] In the present invention, the inlet of the heat exchange jacket is connected to a third metering pump.

[0052] In the present invention, a metering pump is used to adjust the flow rate of materials and heat-conducting medium and adjust the residence time, so as to facilitate accurate control of the reaction process.

[0053] In the present invention, the vibrating rod is one of a corrugated vibrating rod, a vibrating rod with annular fins, a cylindrical vibrating rod and a tubular vibrating rod, which improves the shearing efficiency. The vibrating rod has a wall scraping function to prevent scaling and crystallization on the reactor wall.

[0054] The flow rate of the material is adjusted to adjust the residence time, and the reactor body is a tubular structure.

[0055] In addition, it should be noted that the vibrator can also be arranged in the middle of the reactor body, and the amplitude and frequency of the vibrator are adjustable. A conventional vibrator available on the market can be selected according to actual needs, as long as vibration can be achieved and the amplitude and frequency are adjustable;

[0056] The reaction process can be controlled by program, automation or manual control, which can be selected according to the actual situation and is not particularly limited; the system can be operated continuously or intermittently;

[0057] The material of the reactor body can be selected from heat-resistant, pressure-resistant and corrosion-resistant metals, such as stainless steel, alloy, etc.

[0058] The material of the reactor body can also be non-metal that is resistant to temperature, pressure and corrosion, such as glass, polymer, composite material, etc., among which the composite material can be metal-lined plastic;

[0059] The material of the reactor body is only exemplary, and those skilled in the art may also select other materials according to actual needs;

[0060] The material of the vibrating rod can be the same as that of the reactor body, or other materials can be selected;

[0061] The material of the heat exchange jacket can be the same as that of the reactor body, or other materials can be selected.

[0062] In the invention patent with publication number CN114797743A, its heat exchange jacket corresponds to the jacket in the present invention described below, its temperature measuring device is for the thermometer and pressure gauge in the present invention described below, and the first vibrator 3 in the present invention corresponds to the vibrator in this patent.

[0063] The multifunctional integrated device 10 in the present invention may be the invention patent with publication number CN115970373A, which is fully introduced in the present invention, and its structure is specifically as follows:

[0064] "A multifunctional pipeline chemical equipment, comprising:

[0065] A pipe body having an inlet for feeding and discharging materials and an outlet for draining liquid and exhausting gas;

[0066] The inlet can be used to feed materials, washing liquid, or drying gas. When washing liquid is fed, the washing function is realized, and when drying gas is fed, the drying function is realized. For some materials that are sensitive to air humidity, the outlet can also be connected to a tube-type receiver.

[0067] A rotating shaft, both ends of which are rotatably connected to a fixed bracket, and the pipeline body is rotatably connected thereto and used to drive the pipeline body to rotate, so as to facilitate feeding and discharging. When feeding or discharging at different angles is required, the direction of the pipeline body is adjusted by rotating the rotating shaft;

[0068] A vibrator is disposed at both ends of the rotating shaft, and drives the pipeline body as a whole to vibrate up and down or left and right. The vibration can cause the pipeline to move axially, radially, or in other angular directions;

[0069] The filter screen is arranged in the pipeline body and is used for filtering materials.

[0070] In the present invention, a vibrating rod is arranged in the pipe body.

[0071] In the present invention, one end of the filter screen is an open end, and the other end is a sealed end (located near the outlet);

[0072] The open end is communicated with the inlet, so that the material enters the filter screen for filtration.

[0073] In the present invention, a hollow and / or solid rod is arranged inside the filter screen, and the side surface of the rod is used to scrape the material on the inner wall of the filter screen, which is beneficial to filtering and discharging.

[0074] In the present invention, the side surface of the rod body is in the shape of a washboard, and may also be in other shapes with a scraping function.

[0075] In the present invention, a jacket for drying is provided on the outer wall of the pipeline body, and drying is performed by passing heat-conducting oil or heat-conducting gas.

[0076] In the present invention, the rotating shaft has a locking device for locking the rotating angle of the pipe body, and the locking is performed after the adjustment of different angles is completed.

[0077] In the present invention, the vibrator is an electric or pneumatic vibrator with adjustable amplitude and frequency.

[0078] In the present invention, the inlet and the outlet are respectively provided with a feed / discharge valve and a liquid discharge and exhaust valve. The feed / discharge valve is connected to the inlet through a first connecting pipe, and feeding and discharging are realized through the feed / discharge valve. The liquid discharge and exhaust valve is connected through a second connecting pipe, and liquid discharge and exhaust operations are realized through the liquid discharge and exhaust valve. The two ends of the inlet and the outlet can also be respectively connected with a first hose and a second hose, which is beneficial to the vibration operation of the equipment.

[0079] In the present invention, an air inlet and an air outlet may also be provided on the pipeline body for drying.

[0080] In the present invention, two sets of equipment can be selected for alternate use or multiple sets of equipment can be switched for use to meet the needs of continuous production.

[0081] In the present invention, an air inlet or an air outlet can be formed between the upper pipe cover plate, the lower pipe cover plate and the pipe body, and the upper pipe cover plate is connected by the upper pipe flange and the upper fastening bolts, and the lower pipe cover plate is connected by the lower pipe flange and the lower fastening bolts. ".

[0082] The vibrator disclosed in the invention patent with publication number CN115970373A corresponds to the second vibrator 9 of the present invention, and its jacket corresponds to the jacket in the present invention.

[0083] In the present invention, a raw material tank connected to the crystallizer 4 is also included.

[0084] In the present invention, it also includes a mother liquor tank 11 connected to the multifunctional integrated device 10. The mother liquor filtered out by the multifunctional integrated device 10 enters the mother liquor tank 11. The mother liquor tank 11 is preferably connected to the synthetic mother liquor pump 1 so that the mother liquor can be sent to the synthetic process for reuse.

[0085] In the present invention, a slider (the slider can be solid or hollow) is provided in the crystallizer 4 to control the movement state of the material, control the size of the crystal grains, and prevent the material from sticking to the wall. The slider has a gap between the slider and the pipeline for the material to pass through.

[0086] In the present invention, the sliding block is provided with axial and / or normal through holes for allowing materials to pass through.

[0087] In the present invention, the outer surface of the sliding block has a toothed structure for preventing the material from sticking to the wall.

[0088] In the present invention, a slider may also be provided in the pipe inside the multifunctional all-in-one device 10 (the slider may be solid or hollow). The slider also has a gap with the pipe inside the multifunctional all-in-one device 10 for the passage of materials. Axial and / or normal through holes are provided on the slider for the passage of materials. The outer surface of the slider has a toothed structure for preventing the materials from sticking to the wall.

[0089] In the present invention, the crystallizer 4 and the multifunctional integrated device 10 are both provided with a jacket for temperature control for heat exchange. For example, the refrigerant can be pumped into the jacket through the refrigerant pump 7 via the second flowmeter 6 to control the inlet and outlet temperature difference of the refrigerant so as to control the crystallization temperature of the material. For example, the inlet temperature of the refrigerant is controlled at -40°C and the outlet temperature is controlled at -5°C. The jackets between multiple crystallizers 4 and multiple multifunctional integrated devices 10 are connected in series, and the crystallization temperature of each section of the crystallizer is controlled by the inlet and outlet thermometers and the inlet flowmeter of the jacket of the crystallizer 4.

[0090] In the present invention, there are preferably three crystallizers 4, the temperature of the first crystallizer is preferably 20°C, the temperature of the second crystallizer is preferably 0 to -5°C, and the temperature of the third crystallizer is preferably -20 to -25°C.

[0091] In the present invention, the adjustment of the installation angle of the pipeline in the crystallizer 4 can control the flow state of the material in the pipeline. For example, the horizontal angle is 5 to 20 degrees.

[0092] In the present invention, the temperature of the multifunctional integrated device 10 is controlled at -20 to -25°C by the jacket when filtering is required, 0 to 5°C by the jacket when washing is required, and 60 to 80°C by the jacket when drying.

[0093] In the present invention, the multifunctional integrated device 10 can also adjust the installation angle of the pipeline to control the flow state of the material in the pipeline. For example, when the horizontal angle is 5-55°, the pipe mouth is tilted upward during feeding and filtering to facilitate the filtration of the mother liquid, and tilted downward during discharging to facilitate the discharging of the product material.

[0094] In the present invention, the filtering operation time of the multifunctional all-in-one device 10 is preferably 2 to 5 minutes, the washing time is preferably 1 to 3 minutes, and the drying time is preferably 0.5 to 3 hours, more preferably 2 to 3 hours.

[0095] In the present invention, the power devices of the first vibrator 3 and the second vibrator 9 can be driven by pneumatic and electric driving devices.

[0096] In the present invention, the crystallizer 4 and the jacket outside the multifunctional all-in-one device 10 are both provided with a heat-insulating layer.

[0097] In the present invention, a thermometer 5 and a pressure gauge may be provided on the crystallizer 4 and the multifunctional all-in-one device 10 so as to detect the temperature and pressure of the crystallizer 4 and the multifunctional all-in-one device 10 in real time.

[0098] In the present invention, the synthetic mother liquor (the concentration is generally controlled within 10%) is pumped into the crystallizer 4 for crystallization through the synthetic mother liquor pump 1 and the first flow meter 2. The synthetic mother liquor pump 1 controls the feed flow rate through the first flow meter 2, thereby controlling the material residence time. For example, the material feed rate is controlled to be 50 to 80 g / min. The residence time is 7 to 20 min. In addition, a thermometer and a pressure gauge can be set on the pumping pipeline to control the temperature and pressure of the pumping pipeline. The synthetic mother liquor pump 1 can control the flow rate of the pumped synthetic mother liquor.

[0099] In the present invention, the middle tank 8 is provided with a stirring, a jacket and a heat-insulating layer to maintain a low temperature and prevent the crystallized material from settling, agglomerating and dissolving.

[0100] The present invention also provides a method for using the above-mentioned sodium hexafluorophosphate continuous crystallization and drying system, comprising the following steps:

[0101] 1) Start the crystallizer and send the mother liquor into the crystallizer for crystallization;

[0102] 2) After the crystallization of step 1) is completed, it is sent to the middle tank for stirring;

[0103] 3) Start the multifunctional integrated equipment, and send the material after stirring in the middle tank into the multifunctional integrated equipment for filtration;

[0104] 4) Starting the inert gas replacement device to replace the gas in the multifunctional all-in-one device and to dry the material in the multifunctional all-in-one device;

[0105] 5) After step 4) drying is completed, the material is transported to the finished product tank.

[0106] In the present invention, in step 4), the inert gas replacement time is 1-3h.

[0107] The technical solution of the present invention is described clearly and in detail below in conjunction with specific embodiments.

[0108] Example 1

[0109] Take three crystallizers 4 and two multifunctional integrated devices 10 as an example for explanation, as follows:

[0110] Start the first vibrator 3, the vibration amplitude is 30mm, the vibration frequency is 145Hz, start the freezing liquid pump 7, control the freezing liquid to enter the jacket of the third crystallizer 4, the inlet temperature is -40°C, and the freezing liquid outlet temperature of the first crystallizer 4 is -5°C;

[0111] The synthetic mother liquor with a concentration of 8% is input into three crystallizers 4 at a continuous flow rate of 40 g / min by a synthetic mother liquor pump 1, and the material temperature of the third crystallizer 4 is controlled to be 20°C, the material temperature of the second crystallizer 4 is 0°C, and the material temperature of the first crystallizer 4 is -20°C. The residence time of the materials in the three crystallizers 4 is 8 minutes;

[0112] The material coming out of the crystallizer 4 continuously enters the intermediate tank 8, the stirring of the intermediate tank 8 is started, and the material temperature is controlled at -35°C;

[0113] Start the second vibrator 9 of the multifunctional integrated device 10, with a vibration frequency of 80 Hz and a vibration amplitude of 20 mm, control the jacket temperature to 0-5°C, and control the automatic valve to sequentially add materials to the two multifunctional integrated devices 10, with a material amount of 500 g each time, adjust the pipeline angle after filtering, and adjust the jacket temperature to 70°C;

[0114] Start nitrogen to replace the gas in the pipeline for 2 hours, then cool it down to below 30℃ and put the material into the finished product tank.

[0115] Finished product quality: content 99.96%, acidity 45ppm, moisture 18ppm.

[0116] Example 2

[0117] The flow rate of synthetic mother liquor was 80 g / min, and the other conditions were the same as in Example 1.

[0118] Finished product quality: content 99.95%, acidity 48ppm, moisture 20ppm.

[0119] Example 3

[0120] The jacket temperature of the multifunctional all-in-one device 10 is 50° C., and the other conditions are the same as those in Example 1.

[0121] Finished product quality: content 99.32%, acidity 72ppm, moisture 52ppm.

[0122] Example 4

[0123] The nitrogen replacement time of the multifunctional all-in-one device 10 is 3 hours, and the other conditions are the same as those in Example 1.

[0124] Finished product quality: content 99.60%, acidity 46ppm, moisture 19ppm.

[0125] The above are only preferred specific embodiments of the present invention; however, the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and improved concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A system for continuous crystallization and drying of sodium hexafluorophosphate, characterized in that: It includes a synthetic mother liquor pump, a crystallizer, an intermediate tank, a multifunctional integrated device, an inert gas replacement device and a finished product tank which are sequentially connected through pipelines; The crystallizer is a crystallizer with a first vibrator and capable of adjusting the angle of the pipeline; The multifunctional integrated device is a pipeline-type integrated device with a second vibrator and filtering and drying functions; The inert gas replacement device is used to replace the gas in the multifunctional all-in-one device and dry the material in the multifunctional all-in-one device; The finished product tank is connected to the multifunctional integrated device and is used to store materials processed by the multifunctional integrated device.

2. A system for continuous crystallization and drying of sodium hexafluorophosphate according to claim 1, characterized in that: It also includes a raw material tank communicated with the crystallizer.

3. A system for continuous crystallization and drying of sodium hexafluorophosphate according to claim 1, characterized in that: It also includes a mother liquid tank connected to the multifunctional all-in-one device.

4. A system for continuous crystallization and drying of sodium hexafluorophosphate according to claim 1, characterized in that: A slider is provided in the crystallizer to control the movement state of the material, control the size of the crystal grains, and prevent the material from sticking to the wall. There is a gap between the slider and the pipe for the material to pass through.

5. A system for continuous crystallization and drying of sodium hexafluorophosphate according to claim 4, characterized in that: The sliding block is provided with axial and / or normal through holes for allowing materials to pass through.

6. A system for continuous crystallization and drying of sodium hexafluorophosphate according to claim 4, characterized in that: The outer surface of the sliding block has a toothed structure for preventing the material from sticking to the wall.

7. A system for continuous crystallization and drying of sodium hexafluorophosphate according to any one of claims 1 to 6, characterized in that: The crystallizer and the multifunctional integrated device are both provided with jackets for temperature control.

8. A system for continuous crystallization and drying of sodium hexafluorophosphate according to claim 7, characterized in that: The crystallizer and the jacket outside the multifunctional integrated device are both provided with a heat-insulating layer.

9. A method for using a sodium hexafluorophosphate continuous crystallization and drying system according to any one of claims 1 to 8, characterized in that: The steps include: 1) Start the crystallizer and send the mother liquor into the crystallizer for crystallization; 2) After the crystallization of step 1) is completed, it is sent to the middle tank for stirring; 3) Start the integrated equipment, and send the material after stirring in the middle tank to the multifunctional integrated equipment for filtration; 4) Starting the inert gas replacement device to replace the gas in the multifunctional all-in-one device and to dry the material in the multifunctional all-in-one device; 5) After step 4) drying is completed, the material is transported to the finished product tank.

10. The method of use according to claim 9, characterized in that: In step 4), the inert gas replacement time is 1-3h.

Images