Defluorination purification method and device based on waste lithium battery pyrolysis recovery flue gas

Abstract

The invention discloses a defluorination purification method and device based on waste lithium battery pyrolysis recovery flue gas, relates to the technical field of waste battery recovery, and aims to solve the problem that battery pyrolysis flue gas cannot be normally recovered due to the fact that the liquid supplementing amount cannot be dynamically adjusted and the liquid supplementing action lags. The absorption tower body, the liquid supplementing assembly and the dynamic liquid supplementing platform are adopted, and the rotatable releasing structure is used for timely supplementing according to the concentration of adsorbed liquid medicine in real time, so that the phenomenon that the utilization rate of the sprayed liquid medicine is insufficient is relieved; the liquid supplementing amount can be dynamically adjusted through an adjustable liquid inlet valve according to the flue gas concentration, accurate and intelligent supplementing of the absorption liquid is jointly achieved through a follow-up intermittent positive and negative rotation mixing and stirring structure, and liquid flow bubbles in the absorption liquid supplementing process are reduced in combination with the arrangement of a double bearing structure; through common application of the triple effects, the whole fluid infusion assembly can effectively achieve dynamic adjustment of the fluid infusion amount and targeted regulation and control of the drug concentration in time.

Description

Technical Field

[0001] The invention relates to the technical field of waste battery recycling, and in particular to a defluorination purification method and device based on pyrolysis of waste lithium batteries to recover flue gas. Background Art

[0002] With the rapid development of the lithium battery recycling industry, the treatment of fluorine-containing pollutants (such as HF and fluorine-containing acidic gases) in the flue gas generated by the pyrolysis process has become a key environmental protection issue. In the traditional defluorination purification method, the addition of absorption liquid (such as lime milk, alkali solution, etc.) is the core link to neutralize acidic gases, but the automation defects of its rehydration process directly lead to the following problems: manual rehydration is difficult to match the flue gas flow and fluoride concentration changes in real time, resulting in excessive or insufficient absorption liquid, affecting the adequacy of the reaction; the hysteresis of rehydration causes waste of absorbent (such as lime milk is discharged before it is completely reacted), and frequent shutdowns for maintenance of equipment further reduce production efficiency; non-intelligent rehydration systems are prone to cause pipe scaling and nozzle clogging due to uncontrolled pH values, which aggravates equipment corrosion; namely, defluorination efficiency fluctuations, increased operating costs and reduced equipment reliability;

[0003] In combination with the above, it is necessary to explain that in the current mainstream technical solutions, the design of the absorption liquid replenishment system has the following technical bottlenecks: First, most systems use a fixed-flow replenishment pump, and do not dynamically adjust the replenishment volume in combination with online flue gas monitoring data (such as HF concentration, flow rate, pH value), resulting in insufficient utilization of the absorption liquid; Second, there is a lack of a closed-loop control system with multi-parameter feedback (such as a linkage algorithm based on a pH sensor, flow meter, and fluoride ion detector), and the replenishment action lags behind changes in operating conditions, affecting the normal recovery of pyrolysis flue gas from waste lithium batteries.

[0004] To this end, this application proposes a solution. Summary of the invention

[0005] The purpose of the present invention is to provide a defluorination purification method and device based on the recovery of flue gas from pyrolysis of waste lithium batteries, which is used to solve the problem that the battery pyrolysis flue gas cannot be normally recovered due to the inability to dynamically adjust the amount of liquid replenishment and the lag in the liquid replenishment action.

[0006] The purpose of the present invention can be achieved by the following technical solutions: a defluorination purification device based on the recovery of flue gas by pyrolysis of waste lithium batteries, comprising an absorption tower body and a liquid replenishment component, wherein the liquid replenishment component is communicatively connected to a dynamic liquid replenishment platform, and the dynamic liquid replenishment platform comprises a processor, a flue gas composition monitoring module, an action execution monitoring module, a real-time working condition linkage module and a closed-loop control module;

[0007] The flue gas composition monitoring module is used to collect emission factors during the operation of the absorption tower body, and send the emission factors to the real-time working condition linkage module through the processor; the action execution monitoring module is used to obtain the parameter feedback value of the liquid replenishment component, and send the parameter feedback value to the real-time working condition linkage module through the processor;

[0008] The real-time operating condition linkage module combines the received emission factor and parameter feedback value to form a fluid replenishment coefficient, generates a positive feedback regulation signal and a negative feedback regulation signal based on a comparative analysis of the fluid replenishment coefficient and a preset fluid replenishment coefficient threshold, and sends the positive feedback regulation signal and the negative feedback regulation signal to the closed-loop control module to execute related actions.

[0009] It is further configured as follows: the liquid replenishment component includes a liquid replenishment tank and a dosing tank, the liquid replenishment tank and the dosing tank are connected by a connecting pipe, the output end of the liquid replenishment tank is connected to the spray device on the top of the absorption tower body, and the top of the liquid replenishment tank is equipped with a liquid inlet pipe of a preset regulating valve for replenishing absorption liquid; a liquid distribution valve body is installed on the top of the liquid replenishment tank, a floating box is suspended at the inner bottom of the liquid distribution valve body, and the upper end of the floating box is connected to a liquid replenishment valve that matches the top of the liquid distribution valve body.

[0010] It is further configured as follows: a fixed cover is installed on the top of the dosing tank, a mixing tube is inserted in the middle of the fixed cover, and a drug outlet is opened on the mixing tube, a dosing tube is rotatably installed inside the mixing tube, a dosing disk corresponding to the drug outlet is connected to the outer sleeve of the dosing tube, and a matching opening matching the drug outlet is opened on the dosing disk.

[0011] It is further configured as follows: a swing hole is symmetrically opened at the upper end of the mixing tube, and a mixing rod facing the bottom of the dosing tank is installed at the upper end of the dosing tube corresponding to the swing hole.

[0012] It is further configured as follows: a motor is arranged above the fixed cover, the output end of the motor is connected to a driving disk downward, and the upper end of the dosing tube extends to the top of the fixed cover and is equipped with a driven disk frictionally connected to the driving disk.

[0013] It is further configured as follows: guide pillars for guiding the floating box up and down are symmetrically installed at the bottom of the liquid replenishing tank, and a follower rod is installed at the upper end of the floating box, and a spring connected to the liquid replenishing valve is installed on the follower rod.

[0014] It is further configured as follows: a supporting plate is installed on the upper end of the floating box, the supporting plate is a conical hollow structure with seepage holes on the side, and a liquid storage sleeve is installed on the upper end of the liquid replenishment valve, the liquid storage sleeve is a cylindrical hollow structure with liquid holes on the side.

[0015] It is further configured as follows: a defluorination purification method based on flue gas recovered by pyrolysis of waste lithium batteries, comprising the following steps: a: real-time monitoring and acquisition of flue gas composition data in the absorption tower body and absorption liquid parameters in the replenishment tank and the dosing tank; b: dynamic adjustment guidance of the replenishment volume and absorption liquid concentration based on the flue gas composition data in the absorption tower body and the absorption liquid parameters in the replenishment tank and the dosing tank; c: execution of adjustment of the absorption liquid flow in the replenishment tank and the absorption liquid concentration in the dosing tank; d: pumping the absorption liquid into the absorption tower body to complete the linkage spraying.

[0016] The present invention has the following beneficial effects:

[0017] 1. The present invention aims to solve the problem that the battery pyrolysis flue gas cannot be normally recovered due to the inability to dynamically adjust the amount of liquid replenishment and the delayed liquid replenishment action; the rotatable release structure can replenish the adsorbed liquid in real time according to the concentration of the adsorbed liquid, so that the phenomenon of insufficient utilization of the spray liquid is alleviated, and the adjustable liquid inlet valve can dynamically adjust the amount of liquid replenishment according to the flue gas concentration and the follow-up intermittent positive and reverse mixing and stirring structure can jointly realize the precise and intelligent replenishment of the absorption liquid, and the layout of the double receiving structure can reduce the liquid flow bubbles in the absorption liquid replenishment process; the three effects can be applied together to enable the entire liquid replenishment component to effectively realize the dynamic adjustment of the liquid replenishment amount and timely targeted regulation of the drug concentration;

[0018] 2. During the defluorination purification process, when the absorption liquid utilization rate is insufficient in the absorption tower body, the pH sensor, flow meter and fluoride ion detector in the absorption tower body and the liquid replenishment component obtain the emission factor and parameter feedback value in real time, and guide the closed-loop control module to perform relevant guidance actions under the analysis of the real-time working condition linkage module: Action 1: Determine the concentration of fluorine-containing flue gas in the absorption tower body, which is specifically monitored by the fluoride ion detector installed in the absorption tower body. If the absorption liquid utilization rate is insufficient, immediately start action 2; Action 2: According to the linkage and use of the rotatable release structure and the adjustable liquid inlet valve, adjust the proportion of the absorption original liquid and the liquid, and make flow adjustments simultaneously, so that the concentration of fluorine-containing flue gas in the absorption tower body is targetedly adapted and reduced, so as to realize timely guidance of liquid replenishment actions according to changes in working conditions, and improve the normal recovery efficiency of pyrolysis flue gas from waste lithium batteries. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a structural schematic diagram of the present invention;

[0021] Figure 2 It is a schematic diagram of the structure of the fluid replenishment assembly of the present invention;

[0022] Figure 3 It is a partial structural cutaway diagram of the fluid infusion assembly of the present invention;

[0023] Figure 4 is a front cross-sectional view of the fluid replenishment assembly of the present invention;

[0024] Figure 5 This is a structural breakdown diagram of the dosing component of the present invention;

[0025] Figure 6 It is a schematic structural diagram of the liquid replenishing valve of the present invention.

[0026] In the figure: 1. Absorption tower body; 2. Liquid replenishment assembly; 3. Liquid replenishment tank; 4. Dosing tank; 5. Liquid distribution valve body; 6. Liquid inlet pipe; 7. Fixed cover; 8. Liquid replenishment valve; 9. Floating box; 10. Guide column; 11. Carrying plate; 12. Seepage hole; 13. Liquid storage sleeve; 14. Liquid through hole; 15. Connecting pipe; 16. Mixing pipe; 17. Drug outlet; 18. Stirring rod; 19. Driven plate; 20. Spring; 21. Follower rod; 22. Fixed frame; 23. Dosing pipe; 24. Dosing plate; 25. Matching port; 26. Motor; 27. Active plate; 28. Swing hole. DETAILED DESCRIPTION

[0027] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] Embodiment 1: In order to solve the problem that the battery pyrolysis flue gas cannot be normally recovered due to the inability to dynamically adjust the amount of liquid replenishment and the delayed liquid replenishment action, the following technical solution is proposed:

[0029] Reference Figure 1 - Figure 6 As shown, in this embodiment, the defluorination purification device based on the recovery of flue gas by pyrolysis of waste lithium batteries includes an absorption tower body 1 and a liquid replenishment component 2, the liquid replenishment component 2 is communicatively connected to a dynamic liquid replenishment platform, the liquid replenishment component 2 includes a liquid replenishment tank 3 and a dosing tank 4, the liquid replenishment tank 3 and the dosing tank 4 are connected through a connecting pipe 15, the output end of the liquid replenishment tank 3 is connected to the spray device at the top of the absorption tower body 1, and the top of the liquid replenishment tank 3 is equipped with a liquid inlet pipe 6 of a preset regulating valve for replenishing absorption liquid, a liquid dispensing valve body 5 is installed at the top of the liquid replenishment tank 3, a floating box 9 is suspended at the inner bottom of the liquid dispensing valve body 5, and the upper end of the floating box 9 is connected to a liquid replenishment valve 8 matched with the inner top of the liquid dispensing valve body 5;

[0030] A fixed cover 7 is installed on the top of the dosing tank 4, a mixing tube 16 is inserted in the middle of the fixed cover 7, and a drug outlet 17 is provided on the mixing tube 16, a dosing tube 23 is rotatably installed inside the mixing tube 16, a dosing plate 24 corresponding to the drug outlet 17 is connected to the outer sleeve of the dosing tube 23, a matching port 25 matching the drug outlet 17 is provided on the dosing plate 24, a swing hole 28 is symmetrically provided on the upper end of the mixing tube 16, and a mixing rod 18 facing the bottom of the dosing tank 4 is installed on the upper end of the dosing tube 23 corresponding to the swing hole 28;

[0031] A motor 26 is arranged above the fixed cover 7, and an output end of the motor 26 is connected to a driving disk 27 downwardly, and an upper end of the dosing tube 23 extends to the upper side of the fixed cover 7 and is provided with a driven disk 19 frictionally connected to the driving disk 27, and a guide column 10 for guiding the floating box 9 up and down is symmetrically arranged at the bottom of the liquid replenishing tank 3, and a follower rod 21 is arranged at the upper end of the floating box 9, and a spring 20 connected to the liquid replenishing valve 8 is arranged on the follower rod 21;

[0032] A carrier plate 11 is installed at the upper end of the floating box 9. The carrier plate 11 is a conical hollow structure with a seepage hole 12 on the side. A liquid storage sleeve 13 is installed at the upper end of the liquid replenishment valve 8. The liquid storage sleeve 13 is a cylindrical hollow structure with a liquid hole 14 on the side.

[0033] Basic principle: Figure 4 To illustrate, through the linkage and coordination of the dosing tank 4 and the liquid replenishing tank 3, the replenishment of the adsorption liquid can respond immediately when the concentration is insufficient, and the rotatable release structure composed of the dosing tube 23 and the dosing plate 24 can be replenished in real time according to the concentration of the adsorption liquid, so that the phenomenon of insufficient utilization of the spray liquid of the absorption tower body 1 is alleviated; and the liquid inlet pipe 6 of the adjustable liquid inlet valve can also make dynamic adjustment of the liquid replenishment amount according to the flue gas concentration in the absorption tower body 1 in real time, and adapt to the demand for spraying liquid of the absorption tower body 1 based on the connection principle of the U-shaped tube, so that the entire liquid replenishment component can effectively realize the dynamic adjustment of the liquid replenishment amount and timely targeted regulation of the drug concentration, and finally achieve accurate and intelligent replenishment of the absorption liquid, so that the battery pyrolysis flue gas can be normally recovered;

[0034] It is important to note that: the dosing tank 4 and the replenishing tank 3 are used in conjunction with each other to realize the immediate replenishment reaction of the adsorbed drug solution when the concentration is insufficient, and the dosing and mixing are also realized by the stirring mechanism that can intermittently rotate forward and reverse. When the dosing tube 23 performs the dosing action, the motor 26 starts and drives the driven disk 19 to rotate forward and reverse through the active disk 27. At this time, the dosing tube 23 and the dosing disk 24 intermittently rotate forward and reverse in the mixing tube 16, that is, the matching port 25 on the dosing disk 24 forms an intermittent connection and matching with the drug outlet 17, and the stirring rod 18 also intermittently rotates forward and reverse through the swing hole 28. In this process, the absorbed drug solution is intermittently released into the dosing tank 4 through the connecting port, and the drug solution is quickly mixed with the original absorption liquid accompanied by the mixing and stirring action, so as to be suitable for subsequent injection into the absorption tower body 1 for spraying;

[0035] In addition, a floating box 9 and a liquid replenishing valve 8 are arranged in the liquid replenishing tank 3, and a carrying plate 11 and a liquid holding sleeve 13 are arranged on them respectively. After the absorption liquid is injected through the liquid inlet pipe 6, it will be pressed downward by the liquid holding sleeve 13 and overcome the elastic force of the spring 20 to complete the liquid injection. The bearing effect of the carrying plate 11 again reduces the impact of the replenishing liquid on the original absorption liquid, thereby greatly reducing the liquid level fluctuation of the absorption liquid in the liquid replenishing component 2, reducing the generation of liquid flow bubbles during the absorption liquid replenishment process, and making the absorption liquid spray in the absorption tower body 1 have a stable effect;

[0036] Combining the above, it can be seen that the rotatable release structure can replenish the adsorption liquid in real time according to the concentration of the adsorption liquid, so that the phenomenon of insufficient utilization of the spray liquid is alleviated, and the adjustable liquid inlet valve can dynamically adjust the liquid replenishment amount according to the flue gas concentration and the follow-up intermittent forward and reverse mixing and stirring structure can jointly realize the precise and intelligent replenishment of the absorption liquid, and the layout of the double receiving structure can reduce the liquid flow bubbles in the absorption liquid replenishment process; the joint application of the triple effect enables the entire liquid replenishment component to effectively realize the dynamic adjustment of the liquid replenishment amount and the timely targeted regulation of the drug concentration.

[0037] Embodiment 2: This embodiment is based on Embodiment 1, and further optimizes the dynamic fluid infusion platform intelligently:

[0038] The dynamic fluid replenishment platform includes a processor, a smoke composition monitoring module, an action execution monitoring module, a real-time working condition linkage module and a closed-loop control module;

[0039] The flue gas composition monitoring module is used to collect the emission factors during the operation of the absorption tower body 1, and send the emission factors to the real-time working condition linkage module through the processor; the action execution monitoring module is used to obtain the parameter feedback value of the liquid replenishment component 2, and send the parameter feedback value to the real-time working condition linkage module through the processor;

[0040] The flue gas component monitoring module is used to obtain the HF concentration value, flow rate and pH value of the flue gas discharged from the absorption tower body 1, and is marked as C 1 , Q 1 and pH 1 The action execution monitoring module is used to obtain the concentration value, flow value and pH value of the absorption liquid supplemented in the liquid replenishment tank 3 and the dosing tank 4, and is marked as C 2 , Q 2 and pH 2 ; The HF concentration value, flow rate and pH value of the flue gas discharged in the absorption tower body 1 constitute the emission factor, and the curve graph with the monitoring time node as the horizontal coordinate and located in the first quadrant of the coordinate system constitutes the emission factor; the concentration value, flow rate and pH value of the absorption liquid supplemented in the liquid replenishment tank 3 and the dosing tank 4 are the curve graphs with the monitoring time node as the horizontal coordinate and located in the first quadrant of the coordinate system as the parameter feedback value;

[0041] It should be noted that: the concentration value, flow value and pH value of the absorption liquid supplement solution are measured in real time by the pH sensor and flow meter installed in the liquid replenishment tank 3 and the dosing tank 4; and the HF concentration value, flow rate and pH value of the flue gas discharged in the absorption tower body 1 are measured by the pH sensor, flow meter and fluoride ion detector installed in the absorption tower body 1, and the setting positions of the above sensors can be determined by technicians in this field according to actual conditions, provided that they are set without interfering with the smooth defluorination purification;

[0042] The real-time working condition linkage module combines the received emission factor and parameter feedback value to form a fluid replenishment coefficient, generates a positive feedback regulation signal and a negative feedback regulation signal based on a comparative analysis of the fluid replenishment coefficient and a preset fluid replenishment coefficient threshold, and sends the positive feedback regulation signal and the negative feedback regulation signal to the closed-loop control module to execute related actions;

[0043] Cross-overlap the two multi-parameter curves, use the emission factor as the minuend and the parameter feedback value as the subtrahend, obtain the numerical difference of the ordinate of each parameter on the same abscissa to calculate the fluid replenishment coefficient, and compare it with the fluid replenishment coefficient threshold value (here 0):

[0044] If the difference is greater than 0, it means that the current HF concentration value, flow rate and pH value in the absorption tower body 1 are greater than the absorption liquid supplementary liquid concentration value, flow rate and pH value in the liquid replenishment component 2. At this time, a negative feedback regulation signal is generated and sent to the closed-loop control module;

[0045] If the difference is equal to 0, it means that the current HF concentration value, flow rate and pH value in the absorption tower body 1 are the same as the absorption liquid replenishment solution concentration value, flow rate and pH value in the replenishment component 2, and no signal is generated;

[0046] If the difference is less than 0, it means that the current HF concentration value, flow rate and pH value in the absorption tower body 1 are all less than the absorption liquid replenishment liquid concentration value, flow rate and pH value in the replenishment component 2. At this time, a positive feedback regulation signal is generated and sent to the closed-loop control module;

[0047] The closed-loop control module receives the positive feedback regulation signal and the negative feedback regulation signal and performs the following actions:

[0048] When the positive feedback regulation signal is received: at this time, the control motor 26 drives the dosing tube 23 to rotate, and the matching port 25 on the dosing disk 24 coincides with the drug outlet 17, so that the maximum concentration of the injected drug solution can be injected and the pH value can be adjusted synchronously; at the same time, the regulating valve is controlled to adjust the flow rate of the absorption liquid injection, and the injection flow rate of the absorption liquid is expanded to achieve the purpose of defluorination and purification of the fluorine-containing pollutants in the absorption tower body 1;

[0049] When a negative feedback regulation signal is received: at this time, the control motor 26 drives the dosing tube 23 to rotate, and the matching port 25 on the dosing disk 24 and the drug outlet 17 rotate and move to a mutually staggered state, at this time, the injection of the minimum concentration of the injected drug solution can be achieved and the pH value can be adjusted synchronously; at the same time, the regulating valve is controlled to adjust the flow rate of the absorption liquid injection, reducing the injection flow rate of the absorption liquid, so as to achieve the purpose of defluorination and purification of fluorine-containing pollutants in the absorption tower body 1.

[0050] The basic principle of the dynamic fluid infusion platform in the present invention is:

[0051] When the absorption liquid utilization rate is insufficient in the absorption tower body 1, the pH sensor, flow meter and fluoride ion detector in the absorption tower body 1 and the liquid replenishment component 2 obtain the emission factor and parameter feedback value in real time, and guide the closed-loop control module to perform relevant guidance actions under the analysis of the real-time working condition linkage module:

[0052] Action 1: Determine the concentration of fluorine-containing flue gas in the absorption tower body 1, specifically by monitoring it with a fluorine ion detector arranged in the absorption tower body 1, and immediately start action 2 if the utilization rate of the absorption liquid is insufficient;

[0053] Action 2: According to the linkage and coordination of the rotatable release structure and the adjustable liquid inlet valve, the proportion of the absorption original liquid and the liquid medicine is adjusted, and the flow rate is adjusted simultaneously, so that the concentration of the fluorine-containing flue gas in the absorption tower body 1 can be adapted and reduced in a targeted manner, and timely guidance on the liquid replenishment action can be made according to the changes in the working conditions, thereby improving the normal recovery efficiency of the pyrolysis flue gas of the waste lithium battery.

[0054] Embodiment 3: This embodiment is combined with Embodiment 1 and Embodiment 2 to show that the defluorination purification method based on the recovery of flue gas by pyrolysis of waste lithium batteries includes the following steps:

[0055] a: Real-time monitoring and acquisition of flue gas composition data in the absorption tower body 1 and absorption liquid parameters in the liquid replenishment tank 3 and the dosing tank 4;

[0056] b: The flue gas composition data in the absorption tower body 1 cooperates with the absorption liquid parameters in the liquid replenishment tank 3 and the dosing tank 4 to provide guidance for the dynamic adjustment of the replenishment amount and the absorption liquid concentration;

[0057] c: Regulate the absorption liquid flow in the liquid replenishment tank 3 and the absorption liquid concentration in the dosing tank 4;

[0058] d: Pump the absorption liquid into the absorption tower body 1 to complete the linkage spraying.

[0059] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods.

Claims

1. A defluorination purification device for recovering flue gas from pyrolysis of waste lithium batteries, comprising an absorption tower body (1) and a liquid replenishment component (2), characterized in that: The fluid replenishment component (2) is communicatively connected to a dynamic fluid replenishment platform, wherein the dynamic fluid replenishment platform comprises a processor, a smoke composition monitoring module, an action execution monitoring module, a real-time working condition linkage module and a closed-loop control module; The flue gas component monitoring module is used to collect emission factors during the operation of the absorption tower body (1), and send the emission factors to the real-time working condition linkage module via the processor; the action execution monitoring module is used to obtain parameter feedback values ​​of the liquid replenishment component (2), and send the parameter feedback values ​​to the real-time working condition linkage module via the processor; The real-time operating condition linkage module combines the received emission factor and parameter feedback value to form a fluid replenishment coefficient, generates a positive feedback regulation signal and a negative feedback regulation signal based on a comparative analysis of the fluid replenishment coefficient and a preset fluid replenishment coefficient threshold, and sends the positive feedback regulation signal and the negative feedback regulation signal to the closed-loop control module to execute related actions.

2. The defluorination purification device based on pyrolysis recovery of flue gas from waste lithium batteries according to claim 1 is characterized in that: The liquid replenishment assembly (2) comprises a liquid replenishment tank (3) and a dosing tank (4); the liquid replenishment tank (3) and the dosing tank (4) are connected via a connecting pipe (15); the output end of the liquid replenishment tank (3) is connected to a spray device at the top of the absorption tower body (1); and a liquid inlet pipe (6) of a preset regulating valve for replenishing absorption liquid is installed at the top of the liquid replenishment tank (3); a liquid dispensing valve body (5) is installed at the top of the liquid replenishment tank (3); a floating box (9) is suspended at the bottom of the liquid dispensing valve body (5); and the upper end of the floating box (9) is connected to a liquid replenishment valve (8) that matches the top of the liquid dispensing valve body (5).

3. The defluorination purification device based on the recovery of flue gas from pyrolysis of waste lithium batteries according to claim 2 is characterized in that: A fixed cover (7) is installed on the top of the dosing tank (4), a drug mixing tube (16) is inserted in the middle of the fixed cover (7), and a drug outlet (17) is provided on the drug mixing tube (16), a drug dosing tube (23) is rotatably installed inside the drug mixing tube (16), a drug dosing disk (24) corresponding to the drug outlet (17) is connected to the outer shell of the drug dosing tube (23), and a matching port (25) matching the drug outlet (17) is provided on the drug dosing disk (24).

4. The defluorination purification device based on the recovery of flue gas from pyrolysis of waste lithium batteries according to claim 3 is characterized in that: The upper end of the drug mixing tube (16) is symmetrically provided with swing holes (28), and the upper end of the drug adding tube (23) is provided with a mixing rod (18) facing the bottom of the drug adding tank (4) corresponding to the swing hole (28).

5. The defluorination purification device based on pyrolysis recovery of flue gas from waste lithium batteries according to claim 4 is characterized in that: A motor (26) is arranged above the fixed cover (7), and an output end of the motor (26) is connected to a driving disk (27) facing downwards. The upper end of the dosing tube (23) extends to the top of the fixed cover (7) and is provided with a driven disk (19) frictionally connected to the driving disk (27).

6. The defluorination purification device based on the recovery of flue gas from pyrolysis of waste lithium batteries according to claim 2 is characterized in that: A guide column (10) for guiding the floating box (9) up and down is symmetrically mounted on the bottom of the liquid replenishing tank (3), and a follower rod (21) is mounted on the upper end of the floating box (9), and a spring (20) connected to the liquid replenishing valve (8) is mounted on the follower rod (21).

7. The defluorination purification device based on the recovery of flue gas from pyrolysis of waste lithium batteries according to claim 6 is characterized in that: A carrier plate (11) is mounted on the upper end of the floating box (9), the carrier plate (11) is a conical hollow structure with seepage holes (12) opened on the side, and a liquid storage sleeve (13) is mounted on the upper end of the liquid replenishment valve (8), the liquid storage sleeve (13) is a cylindrical hollow structure with liquid holes (14) opened on the side.

8. A defluorination purification method based on the recovery of flue gas from pyrolysis of waste lithium batteries, characterized in that: The defluorination purification device based on pyrolysis and flue gas recovery of waste lithium batteries as described in any one of claims 1 to 7 comprises the following steps: a: real-time monitoring and acquisition of flue gas composition data in the absorption tower body (1) and absorption liquid parameters in the liquid replenishment tank (3) and the dosing tank (4); b: The flue gas composition data in the absorption tower body (1) is used in conjunction with the absorption liquid parameters in the liquid replenishment tank (3) and the dosing tank (4) to provide guidance for the dynamic adjustment of the replenishment amount and the absorption liquid concentration; c: regulating the absorption liquid flow in the liquid replenishment tank (3) and the absorption liquid concentration in the dosing tank (4); d: Pumping the absorption liquid into the absorption tower body (1) to complete the linkage spraying.

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