Tank car transporting and conveying system for liquid lithium salt

Abstract

The invention relates to a tank car transporting and conveying system for liquid lithium salt. The preparation method comprises the following steps: adding solid lithium hexafluorophosphate into an organic solvent to prepare a saturated solution of lithium hexafluorophosphate; then adding solid lithium hexafluorophosphate, the prepared saturated solution and a liquid stabilizer into a tank car together to form a supersaturated suspension of lithium hexafluorophosphate in the tank car; transporting the supersaturated suspension of lithium hexafluorophosphate in the tank car to an unloading area, and unloading; the liquid stabilizer disclosed by the invention is prepared by reacting polyether methacrylate PEM-1066, dilithium carbamate phosphate, (Z)-3-tributyltin alkyl acrylate, triethylamine and DMF (Dimethyl Formamide). According to the invention, the material state is a solid-liquid mixed state, the defect of low efficiency of transporting the solid material by a ton bucket is avoided, and more solid lithium hexafluorophosphate can be transported at one time compared with the conventional liquid salt tank car; and compared with traditional liquid salt tank car transportation, the transportation amount is larger, and the transportation cost is saved.

Description

Technical Field

[0001] The invention relates to the technical field of lithium hexafluorophosphate, in particular to a tank truck transportation and delivery system for liquid lithium salt. Background Art

[0002] Lithium hexafluorophosphate is a key component of lithium-ion battery electrolyte. With the development of the industry, the demand for lithium hexafluorophosphate continues to grow.

[0003] Chinese patent CN109058768A: discloses a large-scale low-temperature storage and production liquid supply system and method for lithium battery electrolyte, including a constant temperature electrolyte storage tank, the inlet of the constant temperature electrolyte storage tank is provided with a magnetic unloading pump, the outlet of the constant temperature electrolyte storage tank is connected to a sleeve type constant temperature delivery pipeline through a pipeline equipped with a magnetic circulation delivery pump, the sleeve type constant temperature delivery pipeline is provided with a microporous filter, one side of the sleeve type constant temperature delivery pipeline is connected to a constant temperature workshop buffer tank, one side of the constant temperature workshop buffer tank is connected to an exhaust gas washing tower through a pipeline, one side of the exhaust gas washing tower has a pipeline with an alkali liquid circulation pump extending to the top of the exhaust gas washing tower, the top of the exhaust gas washing tower is connected to an exhaust gas adsorption bed through a pipeline, the top of the constant temperature electrolyte storage tank is provided with a cleaning solvent inlet pipe, the cleaning solvent inlet pipe is connected to a cleaning nozzle installed in the constant temperature electrolyte storage tank, the electrolyte storage capacity is large, the degree of automation is high, and it is suitable for large-scale continuous production.

[0004] Chinese Patent CN115849288A: Provides a chemical raw material unloading method, device and system for unloading liquid chemical raw materials used in chemical production. After the tank truck enters the raw material storage tank area, the liquid chemical raw materials carried by the tank truck are inspected, and the raw material inspection results are uploaded to the MES system. The MES system selects the target unloading raw material storage tank according to the raw material inspection results. In response to receiving the storage tank information of the target unloading raw material storage tank from the MES system, the chemical raw material unloading device unlocks the unloading pump arranged in the unloading pipeline between the tank truck and the target unloading raw material storage tank. Subsequently, it is determined whether the unloading tag generated by the chemical production execution management system matches the unloading pump tag of the unlocked unloading pump, and after matching, the unlockable unloading control valve set in the unloading pipeline is unlocked and released. After the unloading control valve is released, under the control of the unlocked unloading pump, the liquid chemical raw material is unloaded from the tank truck to the target unloading raw material storage tank via the unloading pipeline.

[0005] The above patents and existing lithium hexafluorophosphate are mainly transported in small barrels or ton barrels. This method has a limited amount of each transport and is inefficient. In addition, a large number of expensive ton barrels also increase the cost. Summary of the invention

[0006] In order to solve the above problems, the present invention provides a tank truck transportation and delivery system for liquid lithium salt, and its operation steps are as follows: S1: adding solid lithium hexafluorophosphate into an organic solvent to prepare a saturated solution of lithium hexafluorophosphate; S2: 1-4 parts of solid lithium hexafluorophosphate, 8-16 parts of the saturated solution prepared in S1, and 0.00005-0.0005 parts of a liquid stabilizer are added into a tank truck to form a supersaturated suspension of lithium hexafluorophosphate in the tank truck; S3: transporting the supersaturated suspension of lithium hexafluorophosphate in the tank truck to the unloading area and unloading the truck; The liquid stabilizer is prepared by an addition reaction between polyether methacrylate PEM-1066 and dilithium carbamate phosphate, and an amino-ene addition reaction between (Z)-3-tributyltin alkyl acrylate and dilithium carbamate phosphate; The transportation process is as follows: A1 Preparation: Ensure that all connections between the tank truck and the loading system are correct, including the connection of pressure transmitters, flow meters, temperature sensors, nitrogen circulation and mixing systems, etc. Start the PLC control system and perform self-check and initialization; Check the on-site environment to ensure there are no potential safety hazards; A2 starts the loading pump: According to the loading plan, start the corresponding loading pump; Monitor the pressure transmitter values ​​before and after the loading pump to ensure that the pressure is within the normal range; If the pressure is abnormal, such as the pressure before the loading pump is lower than -10kPa or the pressure after the loading pump is higher than 400kPa, the pump will automatically stop and trigger an alarm; A3 flow monitoring and control: Use flow meters to monitor flow changes in real time during loading; When the accumulated flow reaches the set value, the pump stops automatically; At the same time, the PLC control system records various data during the loading process, including pressure, flow, temperature, etc. A4 Temperature Monitoring and Refrigeration: Monitor the temperature changes in the tank truck in real time through the temperature sensor; When the temperature inside the car exceeds the set value, the refrigeration system is activated to cool down; Ensure the refrigeration system operates normally to maintain a stable temperature inside the tank truck; A5 nitrogen circulation stirring: Start the nitrogen circulation and mixing system according to the material characteristics and loading requirements; By adjusting the stirring rate, ensure that the materials remain evenly mixed during loading; Monitor the operating status of the mixing system to ensure its normal operation; A6 Security Monitoring and Emergency Response: During the loading process, continuously monitor the safety conditions on site; If a leak or other emergency is detected, immediately activate the emergency stop button to cut off all power; Take appropriate emergency measures according to the emergency plan, such as starting the exhaust system, using fire-fighting equipment, etc.; A7 completes loading: When loading is completed, turn off the loading pump and related equipment; Disconnect all connections between the tank truck and the loading system; Summarize and record the loading process, including loading time, loading quantity, abnormal conditions, etc.; The unloading process is as follows: B1 Preparation: Ensure that all connections between the tank truck and the unloading system are correct; Start the PLC control system and perform self-check and initialization; Check the on-site environment to ensure there are no potential safety hazards; B2 starts the unloading pump: According to the unloading plan, start the corresponding unloading pump; Monitor the pressure transmitter values ​​before and after the unloading pump to ensure that the pressure is within the normal range; B3 temperature monitoring and cooling: Monitor the temperature changes in the tank truck in real time through the temperature sensor; When the temperature inside the car exceeds the set value, the refrigeration system is activated to cool it down; Ensure the refrigeration system operates normally to maintain a stable temperature inside the tank truck; B4 nitrogen circulation stirring: Start the nitrogen circulation and mixing system according to the material characteristics and unloading requirements; By adjusting the stirring rate, ensure that the materials remain evenly mixed during unloading; Monitor the operating status of the mixing system to ensure its normal operation; B5 Security Monitoring and Emergency Response: During the unloading process, continuously monitor the safety conditions on site; If a leak or other emergency is detected, immediately activate the emergency stop button to cut off all power; Take appropriate emergency measures according to the emergency plan, such as starting the exhaust system, using fire-fighting equipment, etc.; B6 completes unloading: When unloading is completed, turn off the unloading pump and related equipment; Disconnect all connections between the tank truck and the unloading system; Summarize and record the unloading process, including unloading time, unloading quantity, abnormal situations, etc.

[0007] The organic solvent is DMC or EMC.

[0008] The loading and unloading pipeline is equipped with blockage alarm or prompt facilities, as well as blockage clearing measures. If blockage occurs during the process, it can be discovered in time and effectively cleared.

[0009] The tank truck is equipped with cold preservation measures. When the temperature inside the truck exceeds 30° C., the refrigeration system is started to prevent the lithium hexafluorophosphate from decomposing during transportation.

[0010] The loading site is equipped with a PLC control box, the CPU model of which is Siemens S7-200 SMART-SR30, which can collect data, display data, alarm data, and interlock data, and transmit the collected data to the DCS system via Ethernet or RS485.

[0011] A pressure transmitter is added before the loading pump, and the pump stops automatically when the pressure before the loading pump is lower than -10kPa; a pressure transmitter is added after the loading pump, and the pump stops automatically when the pressure after the loading pump is higher than 400kPa; a flow meter is added at the pump outlet, and the cumulative flow reaches 5000m 3 Stop the pump.

[0012] The tank truck is equipped with a pressure and temperature display, and the refrigeration system is started when the temperature is high; the tank truck is equipped with a nitrogen circulation automatic stirring system; the tank truck outlet is equipped with an automatic backflush system when blocked; the tank truck outlet is equipped with a pressure transmitter, and the negative pressure starts the backflush system.

[0013] The preparation method of the liquid stabilizer is: The raw materials are prepared in a weight ratio of polyether methacrylate PEM-1066: dilithium carbamate phosphate: (Z)-3-tributyltin alkyl acrylate: triethylamine: DMF = 200-240: 30-50: 3-6: 30-60: 500-700, heated and stirred, reacted under normal pressure, and after the reaction, distilled to remove DMF to obtain a liquid stabilizer.

[0014] The reaction temperature is 60-80°C and the reaction time is 100-150 minutes.

[0015] Reaction mechanism The polyether methacrylate PEM-1066 undergoes an amino-ene addition reaction with dilithium carbamate phosphate, and (Z)-3-tributyltin alkyl acrylate undergoes an amino-ene addition reaction with dilithium carbamate phosphate to obtain a polyether containing dilithium phosphate and stannyl.

[0016] Technical Effects The present invention discloses a tank truck transportation and delivery system for liquid lithium salt. Compared with the prior art, the present invention has the following significant effects: 1. Improved stability: By introducing stannic acid and dilithium phosphate, the structure of the polymer becomes more stable. This structural stability helps reduce the decomposition of the polymer under extreme conditions (such as high temperature, strong acid or strong alkaline environment), thereby maintaining its performance unchanged. At the same time, specific groups in the polymer (such as polyether segments) can interfere with the mechanism of foam formation, that is, by destroying the integrity of the foam film or changing the surface properties of the foam, thereby inhibiting the formation of foam.

[0017] 2. Improved solubility: The polymer containing dilithium phosphate has better solubility and dispersibility in the supersaturated suspension of lithium hexafluorophosphate. This improved solubility helps to form a more uniform solution and reduce the foaming caused by uneven dissolution. In addition, the addition of polymer can enhance the overall stability of the liquid, making it more reliable during storage and transportation, and reducing product loss or performance degradation due to instability.

[0018] 3. Economic benefits: The application of this new polymer can bring significant economic benefits to enterprises by improving transportation efficiency and reducing losses. At the same time, due to its environmentally friendly characteristics, it can also reduce the impact on the environment. These advantages make this new polymer have broad prospects and potential in practical applications.

[0019] The economic efficiency of the present invention is mainly reflected in two aspects. First, by improving transportation efficiency and increasing transportation volume, the unit transportation cost is reduced. Since more solid lithium hexafluorophosphate can be transported at a time, the enterprise can reduce the number of transportations and the use of transportation vehicles, thereby reducing fuel consumption, labor costs, and maintenance costs. Second, by simplifying the unloading process and improving safety, the losses and compensation costs caused by improper operation or safety accidents are reduced. These improvements in economic efficiency make the present invention have higher promotion value and market competitiveness in practical applications.

[0020] 4. Improve transportation efficiency and increase transportation volume: The present invention effectively avoids the inefficiency caused by loading, unloading and handling when transporting solid materials in traditional barrels by preparing solid lithium hexafluorophosphate into a supersaturated suspension. At the same time, compared with conventional liquid salt tank truck transportation, the present invention can transport more solid lithium hexafluorophosphate at a time, thereby significantly increasing the amount of material transported in a single trip. This mode of transportation not only improves transportation efficiency, but also greatly reduces the number of transportations, thereby saving transportation costs and bringing significant economic benefits to the enterprise.

[0021] 5. Simplified unloading process and enhanced safety: Since the material state is a solid-liquid mixed state, the unloading process is relatively simple, and no complicated solid material unloading equipment or special processing procedures for liquid materials are required. This greatly reduces the complexity and time cost of operation and improves the unloading efficiency. At the same time, by forming a supersaturated suspension, the present invention can reduce the potential risks caused by pure solids or pure liquids. For example, pure solid materials may generate static electricity or sparks due to vibration, friction and other reasons during transportation, causing safety accidents; while pure liquid materials may have risks such as leakage and volatilization. The supersaturated suspension combines the advantages of solids and liquids, which not only maintains the stability of the material, but also reduces safety risks and improves the safety of transportation and handling. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Flowchart of the tank truck transport and delivery system for liquid lithium salts with control points.

[0023] In the figure: 1. Loading tank; 2. Loading pump; 3. Flow meter; 4. Tank truck; 5. Unloading pump; 6. Unloading tank. DETAILED DESCRIPTION

[0024] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation mode, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0025] The supersaturated suspension of lithium hexafluorophosphate was left to stand for 7 days to observe its stability.

[0026] Example 1 A tank truck transportation and delivery system for liquid lithium salt, the operation steps of which are as follows: S2: 1 ton of solid lithium hexafluorophosphate, 8 tons of the saturated solution prepared in S1, and 0.00005 tons of liquid stabilizer are added into the tank truck to form a supersaturated suspension of lithium hexafluorophosphate in the tank truck; S3: transporting the supersaturated suspension of lithium hexafluorophosphate in the tank truck to the unloading area and unloading the truck; The transportation process is as follows: A1 Preparation: Ensure that all connections between the tank truck and the loading system are correct, including the connection of pressure transmitter PT, flow meter FT, temperature sensor TT, nitrogen circulation stirring system and other equipment; Start the PLC control system and perform self-check and initialization; Check the on-site environment to ensure there are no potential safety hazards; A2 starts the loading pump: According to the loading plan, start the corresponding loading pump 2; Monitor the values ​​of the pressure transmitters PT02 and PT03 before and after the loading pump to ensure that the pressure is within the normal range; If the pressure is abnormal, such as the pressure before the loading pump is lower than -10kPa or the pressure after the loading pump is higher than 400kPa, the pump will automatically stop and trigger an alarm; A3 flow monitoring and control: The flow meter FT01 is used to monitor the flow changes during loading in real time; When the accumulated flow reaches the set value, the pump stops automatically; At the same time, the PLC control system records various data during the loading process, including pressure, flow, temperature, etc. A4 Temperature Monitoring and Refrigeration: Real-time monitoring of temperature changes in the tank truck through the temperature sensor TT02; When the temperature inside the car exceeds the set value, the refrigeration system is activated to cool down; Ensure the refrigeration system operates normally to maintain a stable temperature inside the tank truck; A5 nitrogen circulation stirring: Start the nitrogen circulation and mixing system according to the material characteristics and loading requirements; By adjusting the stirring rate, ensure that the materials remain evenly mixed during loading; Monitor the operating status of the mixing system to ensure its normal operation; A6 Security Monitoring and Emergency Response: During the loading process, continuously monitor the safety conditions on site; If a leak or other emergency is detected, immediately activate the emergency stop button to cut off all power; Take appropriate emergency measures according to the emergency plan, such as starting the exhaust system, using fire-fighting equipment, etc.; A7 completes loading: When loading is completed, turn off loading pump 2 and related equipment; Disconnect all connections between the tank truck and the loading system; Summarize and record the loading process, including loading time, loading quantity, abnormal conditions, etc.; The unloading process is as follows: B1 Preparation: Ensure that all connections between the tank truck and the unloading system are correct; Start the PLC control system and perform self-check and initialization; Check the on-site environment to ensure there are no potential safety hazards; B2 starts the unloading pump: According to the unloading plan, start the corresponding unloading pump 5; Monitor the values ​​of the pressure transmitters PT05 and PT06 before and after the unloading pump to ensure that the pressure is within the normal range; B3 temperature monitoring and cooling: Real-time monitoring of temperature changes in the tank truck through the temperature sensor TT02; When the temperature inside the car exceeds the set value, the refrigeration system is activated to cool it down; Ensure the refrigeration system operates normally to maintain a stable temperature inside the tank truck; B4 nitrogen circulation stirring: Start the nitrogen circulation and mixing system according to the material characteristics and unloading requirements; By adjusting the stirring rate, ensure that the materials remain evenly mixed during unloading; Monitor the operating status of the mixing system to ensure its normal operation; B5 Security Monitoring and Emergency Response: During the unloading process, continuously monitor the safety conditions on site; If a leak or other emergency is detected, immediately activate the emergency stop button to cut off all power; Take appropriate emergency measures according to the emergency plan, such as starting the exhaust system, using fire-fighting equipment, etc.; B6 completes unloading: When unloading is completed, turn off the unloading pump and related equipment; Disconnect all connections between the tank truck and the unloading system; Summarize and record the unloading process, including unloading time, unloading quantity, abnormal situations, etc.

[0027] The organic solvent is DMC or EMC.

[0028] The loading and unloading pipeline is equipped with blockage alarm or prompt facilities, as well as blockage clearing measures. If blockage occurs during the process, it can be discovered in time and effectively cleared.

[0029] The tank truck is equipped with cold preservation measures. When the temperature inside the truck exceeds 30° C., the refrigeration system is started to prevent the lithium hexafluorophosphate from decomposing during transportation.

[0030] The loading site is equipped with a PLC control box, the CPU model of which is Siemens S7-200 SMART-SR30, which can collect data, display data, alarm data, and interlock data, and transmit the collected data to the DCS system via Ethernet.

[0031] A pressure transmitter is added before the loading pump, and the pump stops automatically when the pressure before the loading pump is lower than -10kPa; a pressure transmitter is added after the loading pump, and the pump stops automatically when the pressure after the loading pump is higher than 400kPa; a flow meter is added at the pump outlet, and the cumulative flow reaches 5000m3 Stop the pump.

[0032] The tank truck is equipped with a pressure and temperature display, and the refrigeration system is started when the temperature is high; the tank truck is equipped with a nitrogen circulation automatic stirring system; the tank truck outlet is equipped with an automatic backflush system when blocked; the tank truck outlet is equipped with a pressure transmitter, and the negative pressure starts the backflush system.

[0033] The preparation method of the liquid stabilizer is: The raw materials are prepared in a weight ratio of polyether methacrylate PEM-1066: dilithium carbamate phosphate: (Z)-3-tributyltin alkyl acrylate: triethylamine: DMF = 200:30:3:30:500, heated and stirred, reacted at normal pressure, and after the reaction, distilled to remove DMF to obtain a liquid stabilizer.

[0034] The reaction temperature is 60°C and the reaction time is 100 minutes.

[0035] Example 2 A tank truck transportation and delivery system for liquid lithium salt, the operation steps of which are as follows: S1: adding solid lithium hexafluorophosphate into an organic solvent to prepare a saturated solution of lithium hexafluorophosphate; S2: 2 tons of solid lithium hexafluorophosphate, 12 tons of the saturated solution prepared in S1, and 0.0001 tons of liquid stabilizer are added into the tank truck to form a supersaturated suspension of lithium hexafluorophosphate in the tank truck; S3: transporting the supersaturated suspension of lithium hexafluorophosphate in the tank truck to the unloading area and unloading the truck; The transportation process is as follows: A1 Preparation: Ensure that all connections between the tank truck and the loading system are correct, including the connection of pressure transmitter PT, flow meter FT, temperature sensor TT, nitrogen circulation stirring system and other equipment; Start the PLC control system and perform self-check and initialization; Check the on-site environment to ensure there are no potential safety hazards; A2 starts the loading pump: According to the loading plan, start the corresponding loading pump 2; Monitor the values ​​of the pressure transmitters PT02 and PT03 before and after the loading pump to ensure that the pressure is within the normal range; If the pressure is abnormal, such as the pressure before the loading pump is lower than -10kPa or the pressure after the loading pump is higher than 400kPa, the pump will automatically stop and trigger an alarm; A3 flow monitoring and control: The flow meter FT01 is used to monitor the flow changes during loading in real time; When the accumulated flow reaches the set value, the pump stops automatically; At the same time, the PLC control system records various data during the loading process, including pressure, flow, temperature, etc. A4 Temperature Monitoring and Refrigeration: Real-time monitoring of temperature changes in the tank truck through the temperature sensor TT02; When the temperature inside the car exceeds the set value, the refrigeration system is activated to cool down; Ensure the refrigeration system operates normally to maintain a stable temperature inside the tank truck; A5 nitrogen circulation stirring: Start the nitrogen circulation and mixing system according to the material characteristics and loading requirements; By adjusting the stirring rate, ensure that the materials remain evenly mixed during loading; Monitor the operating status of the mixing system to ensure its normal operation; A6 Security Monitoring and Emergency Response: During the loading process, continuously monitor the safety conditions on site; If a leak or other emergency is detected, immediately activate the emergency stop button to cut off all power; Take appropriate emergency measures according to the emergency plan, such as starting the exhaust system, using fire-fighting equipment, etc.; A7 completes loading: When loading is completed, turn off loading pump 2 and related equipment; Disconnect all connections between the tank truck and the loading system; Summarize and record the loading process, including loading time, loading quantity, abnormal conditions, etc.; The unloading process is as follows: B1 Preparation: Ensure that all connections between the tank truck and the unloading system are correct; Start the PLC control system and perform self-check and initialization; Check the on-site environment to ensure there are no potential safety hazards; B2 starts the unloading pump: According to the unloading plan, start the corresponding unloading pump 5; Monitor the values ​​of the pressure transmitters PT05 and PT06 before and after the unloading pump to ensure that the pressure is within the normal range; B3 temperature monitoring and cooling: Real-time monitoring of temperature changes in the tank truck through the temperature sensor TT02; When the temperature inside the car exceeds the set value, the refrigeration system is activated to cool it down; Ensure the refrigeration system operates normally to maintain a stable temperature inside the tank truck; B4 nitrogen circulation stirring: Start the nitrogen circulation and mixing system according to the material characteristics and unloading requirements; By adjusting the stirring rate, ensure that the materials remain evenly mixed during unloading; Monitor the operating status of the mixing system to ensure its normal operation; B5 Security Monitoring and Emergency Response: During the unloading process, continuously monitor the safety conditions on site; If a leak or other emergency is detected, immediately activate the emergency stop button to cut off all power; Take appropriate emergency measures according to the emergency plan, such as starting the exhaust system, using fire-fighting equipment, etc.; B6 completes unloading: When unloading is completed, turn off the unloading pump and related equipment; Disconnect all connections between the tank truck and the unloading system; Summarize and record the unloading process, including unloading time, unloading quantity, abnormal situations, etc.

[0036] The organic solvent is DMC or EMC.

[0037] The loading and unloading pipeline is equipped with blockage alarm or prompt facilities, as well as blockage clearing measures. If blockage occurs during the process, it can be discovered in time and effectively cleared.

[0038] The tank truck is equipped with cold preservation measures. When the temperature inside the truck exceeds 30° C., the refrigeration system is started to prevent the lithium hexafluorophosphate from decomposing during transportation.

[0039] The loading site is equipped with a PLC control box, the CPU model of which is Siemens S7-200 SMART-SR30, which can collect data, display data, alarm data, and interlock data, and transmit the collected data to the DCS system via Ethernet.

[0040] A pressure transmitter is added before the loading pump, and the pump stops automatically when the pressure before the loading pump is lower than -10kPa; a pressure transmitter is added after the loading pump, and the pump stops automatically when the pressure after the loading pump is higher than 400kPa; a flow meter is added at the pump outlet, and the cumulative flow reaches 5000m 3 Stop the pump.

[0041] The tank truck is equipped with a pressure and temperature display, and the refrigeration system is started when the temperature is high; the tank truck is equipped with a nitrogen circulation automatic stirring system; the tank truck outlet is equipped with an automatic backflush system when blocked; the tank truck outlet is equipped with a pressure transmitter, and the negative pressure starts the backflush system.

[0042] The preparation method of the liquid stabilizer is: The raw materials were prepared in a weight ratio of polyether methacrylate PEM-1066: dilithium carbamate phosphate: (Z)-3-tributyltin alkyl acrylate: triethylamine: DMF = 210:35:4:40:550, heated and stirred, and reacted under normal pressure. After the reaction was completed, DMF was distilled off to obtain a liquid stabilizer.

[0043] The reaction temperature is 65°C and the reaction time is 110 minutes.

[0044] Example 3 A tank truck transportation and delivery system for liquid lithium salt, the operation steps of which are as follows: S2: 3 tons of solid lithium hexafluorophosphate, 14 tons of the saturated solution prepared in S1, and 0.003 tons of liquid stabilizer are added into the tank truck to form a supersaturated suspension of lithium hexafluorophosphate in the tank truck; S3: transporting the supersaturated suspension of lithium hexafluorophosphate in the tank truck to the unloading area and unloading the truck; The transportation process is as follows: A1 Preparation: Ensure that all connections between the tank truck and the loading system are correct, including the connection of pressure transmitter PT, flow meter FT, temperature sensor TT, nitrogen circulation stirring system and other equipment; Start the PLC control system and perform self-check and initialization; Check the on-site environment to ensure there are no potential safety hazards; A2 starts the loading pump: According to the loading plan, start the corresponding loading pump 2; Monitor the values ​​of the pressure transmitters PT02 and PT03 before and after the loading pump to ensure that the pressure is within the normal range; If the pressure is abnormal, such as the pressure before the loading pump is lower than -10kPa or the pressure after the loading pump is higher than 400kPa, the pump will automatically stop and trigger an alarm; A3 flow monitoring and control: The flow meter FT01 is used to monitor the flow changes during loading in real time; When the accumulated flow reaches the set value, the pump stops automatically; At the same time, the PLC control system records various data during the loading process, including pressure, flow, temperature, etc. A4 Temperature Monitoring and Refrigeration: Real-time monitoring of temperature changes in the tank truck through the temperature sensor TT02; When the temperature inside the car exceeds the set value, the refrigeration system is activated to cool down; Ensure the refrigeration system operates normally to maintain a stable temperature inside the tank truck; A5 nitrogen circulation stirring: Start the nitrogen circulation and mixing system according to the material characteristics and loading requirements; By adjusting the stirring rate, ensure that the materials remain evenly mixed during loading; Monitor the operating status of the mixing system to ensure its normal operation; A6 Security Monitoring and Emergency Response: During the loading process, continuously monitor the safety conditions on site; If a leak or other emergency is detected, immediately activate the emergency stop button to cut off all power; Take appropriate emergency measures according to the emergency plan, such as starting the exhaust system, using fire-fighting equipment, etc.; A7 completes loading: When loading is completed, turn off loading pump 2 and related equipment; Disconnect all connections between the tank truck and the loading system; Summarize and record the loading process, including loading time, loading quantity, abnormal conditions, etc.; The unloading process is as follows: B1 Preparation: Ensure that all connections between the tank truck and the unloading system are correct; Start the PLC control system and perform self-check and initialization; Check the on-site environment to ensure there are no potential safety hazards; B2 starts the unloading pump: According to the unloading plan, start the corresponding unloading pump 5; Monitor the values ​​of the pressure transmitters PT05 and PT06 before and after the unloading pump to ensure that the pressure is within the normal range; B3 temperature monitoring and cooling: Real-time monitoring of temperature changes in the tank truck through the temperature sensor TT02; When the temperature inside the car exceeds the set value, the refrigeration system is activated to cool it down; Ensure the refrigeration system operates normally to maintain a stable temperature inside the tank truck; B4 nitrogen circulation stirring: Start the nitrogen circulation and mixing system according to the material characteristics and unloading requirements; By adjusting the stirring rate, ensure that the materials remain evenly mixed during unloading; Monitor the operating status of the mixing system to ensure its normal operation; B5 Security Monitoring and Emergency Response: During the unloading process, continuously monitor the safety conditions on site; If a leak or other emergency is detected, immediately activate the emergency stop button to cut off all power; Take appropriate emergency measures according to the emergency plan, such as starting the exhaust system, using fire-fighting equipment, etc.; B6 completes unloading: When unloading is completed, turn off the unloading pump and related equipment; Disconnect all connections between the tank truck and the unloading system; Summarize and record the unloading process, including unloading time, unloading quantity, abnormal situations, etc.

[0045] The organic solvent is DMC or EMC.

[0046] The loading and unloading pipeline is equipped with blockage alarm or prompt facilities, as well as blockage clearing measures. If blockage occurs during the process, it can be discovered in time and effectively cleared.

[0047] The tank truck is equipped with cold preservation measures. When the temperature inside the truck exceeds 30° C., the refrigeration system is started to prevent the lithium hexafluorophosphate from decomposing during transportation.

[0048] The loading site is equipped with a PLC control box, the CPU model of which is Siemens S7-200 SMART-SR30, which can collect data, display data, alarm data, and interlock data, and transmit the collected data to the DCS system via Ethernet.

[0049] A pressure transmitter is added before the loading pump, and the pump stops automatically when the pressure before the loading pump is lower than -10kPa; a pressure transmitter is added after the loading pump, and the pump stops automatically when the pressure after the loading pump is higher than 400kPa; a flow meter is added at the pump outlet, and the cumulative flow reaches 5000m 3 Stop the pump.

[0050] The tank truck is equipped with a pressure and temperature display, and the refrigeration system is started when the temperature is high; the tank truck is equipped with a nitrogen circulation automatic stirring system; the tank truck outlet is equipped with an automatic backflush system when blocked; the tank truck outlet is equipped with a pressure transmitter, and the negative pressure starts the backflush system.

[0051] The preparation method of the liquid stabilizer is: The raw materials were prepared in a weight ratio of polyether methacrylate PEM-1066: dilithium carbamate phosphate: (Z)-3-tributyltin alkyl acrylate: triethylamine: DMF = 230:45:5:50:650, heated and stirred, and reacted under normal pressure. After the reaction was completed, DMF was distilled off to obtain a liquid stabilizer.

[0052] The reaction temperature is 75°C and the reaction time is 140 minutes.

[0053] Example 4 A tank truck transportation and delivery system for liquid lithium salt, the operation steps of which are as follows: S2: 4 tons of solid lithium hexafluorophosphate, 16 tons of the saturated solution prepared in S1, and 0.0005 tons of liquid stabilizer are added into the tank truck to form a supersaturated suspension of lithium hexafluorophosphate in the tank truck; S3: transporting the supersaturated suspension of lithium hexafluorophosphate in the tank truck to the unloading area and unloading the truck; The transportation process is as follows: A1 Preparation: Ensure that all connections between the tank truck and the loading system are correct, including the connection of pressure transmitter PT, flow meter FT, temperature sensor TT, nitrogen circulation stirring system and other equipment; Start the PLC control system and perform self-check and initialization; Check the on-site environment to ensure there are no potential safety hazards; A2 starts the loading pump: According to the loading plan, start the corresponding loading pump 2; Monitor the values ​​of the pressure transmitters PT02 and PT03 before and after the loading pump to ensure that the pressure is within the normal range; If the pressure is abnormal, such as the pressure before the loading pump is lower than -10kPa or the pressure after the loading pump is higher than 400kPa, the pump will automatically stop and trigger an alarm; A3 flow monitoring and control: The flow meter FT01 is used to monitor the flow changes during loading in real time; When the accumulated flow reaches the set value, the pump stops automatically; At the same time, the PLC control system records various data during the loading process, including pressure, flow, temperature, etc. A4 Temperature Monitoring and Refrigeration: Real-time monitoring of temperature changes in the tank truck through the temperature sensor TT02; When the temperature inside the car exceeds the set value, the refrigeration system is activated to cool down; Ensure the refrigeration system operates normally to maintain a stable temperature inside the tank truck; A5 nitrogen circulation stirring: Start the nitrogen circulation and mixing system according to the material characteristics and loading requirements; By adjusting the stirring rate, ensure that the materials remain evenly mixed during loading; Monitor the operating status of the mixing system to ensure its normal operation; A6 Security Monitoring and Emergency Response: During the loading process, continuously monitor the safety conditions on site; If a leak or other emergency is detected, immediately activate the emergency stop button to cut off all power; Take appropriate emergency measures according to the emergency plan, such as starting the exhaust system, using fire-fighting equipment, etc.; A7 completes loading: When loading is completed, turn off loading pump 2 and related equipment; Disconnect all connections between the tank truck and the loading system; Summarize and record the loading process, including loading time, loading quantity, abnormal conditions, etc.; The unloading process is as follows: B1 Preparation: Ensure that all connections between the tank truck and the unloading system are correct; Start the PLC control system and perform self-check and initialization; Check the on-site environment to ensure there are no potential safety hazards; B2 starts the unloading pump: According to the unloading plan, start the corresponding unloading pump 5; Monitor the values ​​of the pressure transmitters PT05 and PT06 before and after the unloading pump to ensure that the pressure is within the normal range; B3 temperature monitoring and cooling: Real-time monitoring of temperature changes in the tank truck through the temperature sensor TT02; When the temperature inside the car exceeds the set value, the refrigeration system is activated to cool it down; Ensure the refrigeration system operates normally to maintain a stable temperature inside the tank truck; B4 nitrogen circulation stirring: Start the nitrogen circulation and mixing system according to the material characteristics and unloading requirements; By adjusting the stirring rate, ensure that the materials remain evenly mixed during unloading; Monitor the operating status of the mixing system to ensure its normal operation; B5 Security Monitoring and Emergency Response: During the unloading process, continuously monitor the safety conditions on site; If a leak or other emergency is detected, immediately activate the emergency stop button to cut off all power; Take appropriate emergency measures according to the emergency plan, such as starting the exhaust system, using fire-fighting equipment, etc.; B6 completes unloading: When unloading is completed, turn off the unloading pump and related equipment; Disconnect all connections between the tank truck and the unloading system; Summarize and record the unloading process, including unloading time, unloading quantity, abnormal situations, etc.

[0054] The organic solvent is DMC or EMC.

[0055] The loading and unloading pipeline is equipped with blockage alarm or prompt facilities, as well as blockage clearing measures. If blockage occurs during the process, it can be discovered in time and effectively cleared.

[0056] The tank truck is equipped with cold preservation measures. When the temperature inside the truck exceeds 30° C., the refrigeration system is started to prevent the lithium hexafluorophosphate from decomposing during transportation.

[0057] The loading site is equipped with a PLC control box, the CPU model of which is Siemens S7-200 SMART-SR30, which can collect data, display data, alarm data, and interlock data, and transmit the collected data to the DCS system via Ethernet.

[0058] A pressure transmitter is added before the loading pump, and the pump stops automatically when the pressure before the loading pump is lower than -10kPa; a pressure transmitter is added after the loading pump, and the pump stops automatically when the pressure after the loading pump is higher than 400kPa; a flow meter is added at the pump outlet, and the cumulative flow reaches 5000m 3 Stop the pump.

[0059] The tank truck is equipped with a pressure and temperature display, and the refrigeration system is started when the temperature is high; the tank truck is equipped with a nitrogen circulation automatic stirring system; the tank truck outlet is equipped with an automatic backflush system when blocked; the tank truck outlet is equipped with a pressure transmitter, and the negative pressure starts the backflush system.

[0060] The preparation method of the liquid stabilizer is: The raw materials were prepared in a weight ratio of polyether methacrylate PEM-1066: dilithium carbamate phosphate: (Z)-3-tributyltin alkyl acrylate: triethylamine: DMF = 240:50:6:60:700, heated and stirred, reacted under normal pressure, and after the reaction was completed, DMF was distilled off to obtain a liquid stabilizer.

[0061] The reaction temperature is 80°C and the reaction time is 150 minutes.

[0062] Comparative Example 1 No liquid stabilizer was added, and the rest was the same as in Example 1.

[0063] Comparative Example 2 No dilithium carbamate phosphate was added, and the other steps were the same as in Example 1.

[0064] Comparative Example 3 The other steps were the same as in Example 1 except that (Z)-3-tributyltin alkyl acrylate was not added.

[0065] stability Example 1 No sediment Example 2 No sediment Example 3 No sediment Example 4 No sediment Comparative Example 1 There is more sediment Comparative Example 2 A small amount of sediment Comparative Example 3 A small amount of sediment By comparing the above examples with the comparative examples, the supersaturated suspension of lithium hexafluorophosphate of the present invention has no precipitate and has good stability.

[0066] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A tank truck transportation and delivery system for liquid lithium salt, the operation steps of which are: S1: adding solid lithium hexafluorophosphate into an organic solvent to prepare a saturated solution of lithium hexafluorophosphate; S2: 1-4 parts of solid lithium hexafluorophosphate, 8-16 parts of the saturated solution prepared in S1, and 0.00005-0.0005 parts of a liquid stabilizer are added into a tank truck to form a supersaturated suspension of lithium hexafluorophosphate in the tank truck; The liquid stabilizer is prepared by an addition reaction between polyether methacrylate PEM-1066 and dilithium carbamate phosphate, and an amino-ene addition reaction between (Z)-3-tributyltin alkyl acrylate and dilithium carbamate phosphate; S3: transporting the supersaturated suspension of lithium hexafluorophosphate in the tank truck to the unloading area and unloading the truck; The transportation process is as follows: A1 Preparation: Ensure that all connections between the tank truck and the loading system are correct, including the connection of pressure transmitters, flow meters, temperature sensors, nitrogen circulation and mixing systems, etc. Start the PLC control system and perform self-check and initialization; Check the on-site environment to ensure there are no potential safety hazards; A2 starts the loading pump: According to the loading plan, start the corresponding loading pump; Monitor the pressure transmitter values ​​before and after the loading pump to ensure that the pressure is within the normal range; If the pressure is abnormal, such as the pressure before the loading pump is lower than -10kPa or the pressure after the loading pump is higher than 400kPa, the pump will automatically stop and trigger an alarm; A3 flow monitoring and control: Use flow meters to monitor flow changes during loading in real time; When the accumulated flow reaches the set value, the pump stops automatically; At the same time, the PLC control system records various data during the loading process, including pressure, flow, temperature, etc. A4 Temperature Monitoring and Refrigeration: Monitor the temperature changes in the tank truck in real time through the temperature sensor; When the temperature inside the car exceeds the set value, the refrigeration system is activated to cool down; Ensure the refrigeration system operates normally to maintain a stable temperature inside the tank truck; A5 nitrogen circulation stirring: Start the nitrogen circulation and mixing system according to the material characteristics and loading requirements; By adjusting the stirring rate, ensure that the materials remain evenly mixed during loading; Monitor the operating status of the mixing system to ensure its normal operation; A6 Security Monitoring and Emergency Response: During the loading process, continuously monitor the safety conditions on site; If a leak or other emergency is detected, immediately activate the emergency stop button to cut off all power; Take appropriate emergency measures according to the emergency plan, such as starting the exhaust system, using fire-fighting equipment, etc.; A7 completes loading: When loading is completed, turn off the loading pump and related equipment; Disconnect all connections between the tank truck and the loading system; Summarize and record the loading process, including loading time, loading quantity, abnormal conditions, etc.; The unloading process is as follows: B1 Preparation: Ensure that all connections between the tank truck and the unloading system are correct; Start the PLC control system and perform self-check and initialization; Check the on-site environment to ensure there are no potential safety hazards; B2 starts the unloading pump: According to the unloading plan, start the corresponding unloading pump; Monitor the pressure transmitter values ​​before and after the unloading pump to ensure that the pressure is within the normal range; B3 temperature monitoring and cooling: Monitor the temperature changes in the tank truck in real time through the temperature sensor; When the temperature inside the car exceeds the set value, the refrigeration system is activated to cool it down; Ensure the refrigeration system operates normally to maintain a stable temperature inside the tank truck; B4 nitrogen circulation stirring: Start the nitrogen circulation and mixing system according to the material characteristics and unloading requirements; By adjusting the stirring rate, ensure that the materials remain evenly mixed during unloading; Monitor the operating status of the mixing system to ensure its normal operation; B5 Security Monitoring and Emergency Response: During the unloading process, continuously monitor the safety conditions on site; If a leak or other emergency is detected, immediately activate the emergency stop button to cut off all power; Take appropriate emergency measures according to the emergency plan, such as starting the exhaust system, using fire-fighting equipment, etc.; B6 completes unloading: When unloading is completed, turn off the unloading pump and related equipment; Disconnect all connections between the tank truck and the unloading system; Summarize and record the unloading process, including unloading time, unloading quantity, abnormal situations, etc.

2. The tank truck transportation and delivery system for liquid lithium salt according to claim 1, characterized in that: The organic solvent is DMC or EMC.

3. The tank truck transportation and delivery system for liquid lithium salt according to claim 1, characterized in that: The loading and unloading pipeline is equipped with blockage alarm or prompt facilities, as well as blockage clearing measures. If blockage occurs during the process, it can be discovered in time and effectively cleared.

4. The tank truck transportation and delivery system for liquid lithium salt according to claim 1, characterized in that: The tank truck is equipped with cold preservation measures. When the temperature inside the truck exceeds 30° C., the refrigeration system is started to prevent the lithium hexafluorophosphate from decomposing during transportation.

5. The tank truck transportation and delivery system for liquid lithium salt according to claim 1, characterized in that: The loading site is equipped with a PLC control box, the CPU model of which is Siemens S7-200 SMART-SR30, which can collect data, display data, alarm data, and interlock data, and transmit the collected data to the DCS system via Ethernet or RS485.

6. The tank truck transportation and delivery system for liquid lithium salt according to claim 1, characterized in that: A pressure transmitter is added before the loading pump, and the pump stops automatically when the pressure before the loading pump is lower than -10kPa; a pressure transmitter is added after the loading pump, and the pump stops automatically when the pressure after the loading pump is higher than 400kPa; a flow meter is added at the pump outlet, and the cumulative flow reaches 5000m 3 Stop the pump.

7. The tank truck transportation and delivery system for liquid lithium salt according to claim 1, characterized in that: The tank truck is equipped with a pressure and temperature display, and the refrigeration system is started when the temperature is high; the tank truck is equipped with a nitrogen circulation automatic stirring system; the tank truck outlet is equipped with an automatic backflush system when blocked; the tank truck outlet is equipped with a pressure transmitter, and the negative pressure starts the backflush system.

8. The tank truck transportation and delivery system for liquid lithium salt according to claim 1, characterized in that: The preparation method of the liquid stabilizer is: The raw materials are prepared in a weight ratio of polyether methacrylate PEM-1066: dilithium carbamate phosphate: (Z)-3-tributyltin alkyl acrylate: triethylamine: DMF = 200-240: 30-50: 3-6: 30-60: 500-700, heated and stirred, reacted under normal pressure, and after the reaction, distilled to remove DMF to obtain a liquid stabilizer.

9. The tank truck transportation and delivery system for liquid lithium salt according to claim 8, characterized in that: The reaction temperature is 60-80°C and the reaction time is 100-150 minutes.

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