Oxygen content monitoring system suitable for battery cell treatment

Abstract

The utility model discloses an oxygen content monitoring system suitable for battery cell treatment. The oxygen content monitoring system is arranged in a conveying channel of a lithium battery recycling line. Comprising a nitrogen device, a sampling probe device, a heating type sampling tube, a separation device and a laser oxygen analyzer, the sampling probe device is communicated with a conveying channel of a lithium battery recovery line, a blowback channel is arranged between the nitrogen device and the sampling probe device, and the nitrogen device and the sampling probe device are communicated through the blowback channel; the separation device comprises a cooler, a water passing device and a dehumidifier which are communicated in sequence, and the dehumidifier is further communicated with the laser oxygen analyzer; the nitrogen device conveys nitrogen to the sampling probe device through a back flushing channel, the sampling probe device samples gas through a conveying channel of a lithium battery recycling line, the gas sequentially passes through the sampling probe device, the heating type sampling pipe and the separation device and then enters the laser oxygen analyzer, and the gas is treated and monitored through the laser oxygen analyzer.

Description

Technical Field

[0001] The utility model belongs to the technical field of waste battery treatment, and particularly relates to an oxygen content monitoring system suitable for cell treatment. Background Technique

[0002] During the treatment process of waste lithium batteries, the requirement for oxygen concentration is relatively high. Since during cell treatment, a relatively high oxygen content concentration will cause deflagration and thus pose potential safety hazards, it is necessary to monitor the oxygen content during the process of crushing and pyrolyzing the battery to avoid safety problems such as explosion. The existing technical bases for oxygen content monitoring mainly include electrochemistry measurement technology, optical measurement technology, infrared measurement technology, gas chromatography measurement technology, etc. When using optical measurement technology to monitor the oxygen content, the gas concentration is obtained by analyzing the selective absorption of laser by the gas, which has the characteristics of high precision and fast response.

[0003] However, when monitoring the oxygen content during the treatment process of waste batteries through optical technology, such as a laser oxygen analyzer, the received sample gas needs to be clean and dry to ensure the accuracy of measurement and the long-term stable operation of the equipment. During the process of crushing and pyrolyzing waste lithium batteries, other substances such as lipids, benzenes, black powder, dust, and diaphragms will be generated, which do not meet the standard of clean and dry sample gas; if traditional chemical methods are used for monitoring, the use of chemical reagents is required, and the requirements for equipment maintenance and operating costs are relatively high. Summary of the Invention

[0004] Aiming at the problems in the related technology, the utility model provides an oxygen content monitoring system suitable for cell treatment. By pre-treating the sampled gas and then using a laser oxygen analyzer to monitor the oxygen content in real time, the influence of dust can be eliminated, and accidental deflagration during the cell treatment process can be effectively avoided.

[0005] The utility model is realized as follows:

[0006] An oxygen content monitoring system suitable for cell treatment is arranged in the conveying channel of a lithium battery recycling line; it includes a nitrogen device, a sampling probe device, a heated sampling pipe, a separation device, and a laser oxygen analyzer; the sampling probe device is communicated with the conveying channel of the lithium battery recycling line, and there is a backflush channel between the nitrogen device and the sampling probe device and they are communicated through the backflush channel;

[0007] The separation device includes a cooler, a water separator, and a dehumidifier that are connected in sequence, and the dehumidifier is also communicated with the laser oxygen analyzer;

[0008] The nitrogen gas device transports nitrogen gas to the sampling probe device through the backflush channel. The sampling probe device samples the gas through the transport channel of the lithium battery recycling line. After passing through the sampling probe device, the heated sampling pipe, and the separation device in sequence, it enters the laser oxygen analyzer, and the gas is processed and monitored by the laser oxygen analyzer.

[0009] The heated sampling pipe uses a constant temperature tracing method to uniformly heat the inside of the heated sampling pipe, and has a stable and fast heating speed, effectively avoiding the condensation of the sampled gas to block the pipeline; in addition, the heated sampling pipe uses a polytetrafluoroethylene (Teflon) pipe, and the pipeline has stable performance, corrosion resistance, and high temperature resistance. It does not need to be replaced after long-term use.

[0010] Preferably, the sampling probe device includes a sampling probe rod, a high-precision filter, a probe heater, and a protective box, and the sampling probe rod, the high-precision filter, and the probe heater are arranged in the protective box.

[0011] Specifically, the sampling probe rod is connected to the transport channel of the lithium battery recycling line, and the gas in the transport channel of the lithium battery recycling line is sampled through the sampling probe rod.

[0012] Preferably, the sampling probe device includes a first sampling probe device and a second sampling probe device, and the nitrogen gas device is connected to the first sampling probe device and the second sampling probe device respectively through the backflush channel; the sampling probe rod is connected to the high-precision filter, and the probe heater heats the inside of the protective box.

[0013] Specifically, the dual sampling probe device samples the gas continuously in turn by switching to ensure the continuity of measurement; the sampling probe rod samples the gas, which is filtered by the high-precision filter; the probe heater heats the inside of the protective box, which can reduce the condensation and adhesion of organic matter in the gas on the composite membrane.

[0014] Preferably, the sampling probe device is provided with an outer blow port and an inner blow port, and the backflush channel is sleeved outside the outer outlet and the inner outlet.

[0015] Specifically, the sampled gas can remove solid dust after being processed by the sampling probe device.

[0016] Preferably, the outer blow port is connected to the outside of the high-precision filter, and the inner blow port is connected to the inside of the high-precision filter; nitrogen gas enters the sampling probe device through the inner blow port and the outer blow port respectively for purging, and then flows out into the transport channel of the lithium battery recycling line.

[0017] Specifically, nitrogen gas enters the inside of the high-precision filter through the inner blow port, passes through the high-precision filter, and then flows out into the transport channel of the lithium battery recycling line.

[0018] Preferably, the nitrogen gas device includes an air filter and a gas storage tank, and the air filter is connected to the gas storage tank; the compressed nitrogen gas is filtered by the air filter and then stored in the gas storage tank, and enters the backflush channel from the gas storage tank.

[0019] Specifically, the compressed nitrogen gas is filtered by the air filter to remove oil, water, and dust in the nitrogen gas, and then enters the gas storage tank for storage to ensure sufficient pressure and flow rate during backflushing, so as to make the backflushing effect better.

[0020] A purging device is also provided in the nitrogen gas device, and the black powder, lipids, and diaphragm adhered to the composite membrane are purged by the purging device through internal and external pulsed vibration purging. While removing 90% of the black powder and the diaphragm, it ensures that the composite membrane is not blocked. The initial setting of the backflush time is 10 seconds / time and can be adjusted by itself.

[0021] Preferably, the nitrogen gas device is also provided with a backflush solenoid valve, and the gas in the gas storage tank is controlled by the backflush solenoid valve to be transported to the backflush channel.

[0022] Specifically, the backflush solenoid valve can control the opening and closing of the backflush channel, and thus control the gas transportation.

[0023] Preferably, the cooler is connected with a condensing pipe.

[0024] Specifically, after the gas is cooled by the cooler, the organic substances in the gas, such as lipids and benzene series substances, are discharged through the condensing pipe; the lipids and benzene in the gas are condensed and discharged through the condensing pipe, and the black powder may be discharged along with it due to adhesion.

[0025] The cooled gas is treated by a water separator, and the acidic gases, such as hydrogen fluoride and part of the black powder, are left in the water, and then dehumidified by a dehumidifier and enter the laser oxygen analyzer.

[0026] Preferably, the monitoring system further includes a control device, and the monitoring system is controlled by the control device.

[0027] Specifically, the control device is mainly for facilitating manual operation and control of the monitoring system.

[0028] Preferably, the control device includes a flow control unit and a humidity alarm unit. The flow control unit is used to regulate the gas flow rate in the monitoring system, and the humidity alarm unit is used to stop the sampling probe device from sampling and output an alarm signal at the same time.

[0029] Specifically, the flow control unit transports the nitrogen gas in the gas storage tank to the backflush channel and distributes it to the inner blowing port and the outer blowing port respectively. When the moisture in the system suddenly increases or the cooler fails, the humidity alarm unit will stop the sampling probe device from sampling and output an alarm signal to prevent impurities such as moisture from entering the inside of the monitoring system and effectively protect the analytical instruments, etc.

[0030] Compared with the prior art, the utility model has the following beneficial effects:

[0031] The utility model provides an oxygen content monitoring system applicable to cell processing, which includes a nitrogen device, a sampling probe device, a heated sampling pipe, a separation device and a laser oxygen analyzer. The gas is pretreated through the nitrogen device, the sampling probe device, the heated sampling pipe and the separation device to ensure that the laser oxygen analyzer receives a sample gas meeting the requirements, that is, dust, organic matter, acidic gas, water, etc. are removed to ensure the accuracy of measurement and the long-term stable operation of the equipment. By purging with the nitrogen device, the optical elements can be protected from contamination and the maintenance cycle can be extended; a large amount of dust is generated during the processing of waste batteries. By using nitrogen purging and the separation device, the dust can be removed, and the influence on the light transmittance of the laser can be avoided, thus ensuring the measurement effect; the heated sampling pipe adopts a constant temperature tracing method, which can effectively avoid the condensation of the sample gas and blockage of the channel, and at the same time can prevent corrosion. The laser oxygen analyzer adopts the TDLAS technology, and obtains the concentration of the gas by analyzing the selective absorption of the laser by the gas, which has the characteristics of high precision and fast response; the laser oxygen analyzer can realize non-contact measurement, avoiding the pollution and error that may be brought by contact measurement; compared with the traditional chemical method or electrochemical method, the laser method avoids the use of chemical reagents, reduces the maintenance requirements of the equipment, and reduces the operation cost. Description of the Drawings

[0032] Figure 1 It is a schematic structural diagram of an oxygen content monitoring system applicable to cell processing in an embodiment of the utility model;

[0033] Figure 2 It is a schematic diagram of internal nitrogen blowing of an oxygen content monitoring system applicable to cell processing in an embodiment of the utility model;

[0034] Figure 3 It is a schematic diagram of external nitrogen blowing of an oxygen content monitoring system applicable to cell processing in an embodiment of the utility model. Detailed Embodiments

[0035] Next, the technical solutions in the embodiments of the utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the utility model without making creative efforts shall fall within the protection scope of the utility model.

[0036] Embodiment

[0037] As Figures 1 to 3, an oxygen content monitoring system suitable for cell processing, is arranged in the conveying channel of the lithium battery recycling line;

[0038] It includes a nitrogen device, a sampling probe device, a heated sampling pipe, a separation device, and a laser oxygen analyzer; the sampling probe device is connected to the conveying channel of the lithium battery recycling line, and there is a backflush channel between the nitrogen device and the sampling probe device and they are connected through the backflush channel;

[0039] The separation device includes a cooler, a water separator, and a dehumidifier connected in sequence, and the dehumidifier is also connected to the laser oxygen analyzer;

[0040] The nitrogen device transports nitrogen to the sampling probe device through the backflush channel. The sampling probe device samples the gas from the conveying channel of the lithium battery recycling line. After passing through the sampling probe device, the heated sampling pipe, and the separation device in sequence, it enters the laser oxygen analyzer, and the gas is processed and monitored by the laser oxygen analyzer.

[0041] Among them, the heated sampling pipe uses a constant temperature tracing method to uniformly heat the inside of the heated sampling pipe, and has a stable and fast heating speed, effectively avoiding the condensation and blockage of the sampled gas in the pipeline; in addition, the heated sampling pipe uses a polytetrafluoroethylene (Teflon) pipe, with stable pipeline performance, corrosion resistance, and high temperature resistance. It does not need to be replaced after long-term use.

[0042] The sampling probe device includes a sampling probe rod, a high-precision filter, a probe heater, and a protective box. The sampling probe rod, high-precision filter, and probe heater are arranged in the protective box.

[0043] The sampling probe rod is connected to the conveying channel of the lithium battery recycling line, and the gas in the conveying channel of the lithium battery recycling line is sampled through the sampling probe rod.

[0044] The sampling probe device includes a first sampling probe device and a second sampling probe device. The nitrogen device is connected to the first sampling probe device and the second sampling probe device respectively through the backflush channel; the sampling probe rod is connected to the high-precision filter, and the probe heater heats the inside of the protective box.

[0045] The dual sampling probe device samples the gas continuously in turn by switching to ensure the continuity of measurement; the sampling probe rod samples the gas, which is filtered by the high-precision filter; the probe heater heats the inside of the protective box, which can reduce the condensation and adhesion of organic substances in the gas on the composite film.

[0046] The sampling probe device is provided with an external blowing port and an internal blowing port, and the backflush channel is sleeved outside the external outlet and the internal outlet.

[0047] The sampled gas can remove solid dust after being processed by the sampling probe device.

[0048] The external blowing port is connected to the outside of the high-precision filter, and the internal blowing port is connected to the inside of the high-precision filter; nitrogen enters the sampling probe device through the internal and external blowing ports respectively for purging and then flows out into the conveying channel of the lithium battery recycling line.

[0049] Nitrogen enters the inside of the high-precision filter through the internal blowing port, passes through the high-precision filter, and flows out into the conveying channel of the lithium battery recycling line.

[0050] The nitrogen device includes an air filter and a gas storage tank, and the air filter is connected to the gas storage tank; the compressed nitrogen is filtered by the air filter and then stored in the gas storage tank, and enters the backflush channel from the gas storage tank.

[0051] The compressed nitrogen is filtered by the air filter to remove oil, water, and dust in the nitrogen, and then enters the gas storage tank for storage to ensure sufficient pressure and flow during backflushing, making the backflushing effect better.

[0052] The nitrogen device is also provided with a purging device, which performs internal and external pulsed vibration purging on the black powder, lipids, and diaphragms adhering to the composite membrane, removing 90% of the black powder and diaphragms while ensuring that the composite membrane is not blocked. The initial setting of the backflush time is 10 seconds / time and can be adjusted by itself.

[0053] The nitrogen device is also provided with a backflush solenoid valve, and the gas in the gas storage tank is controlled to be transported to the backflush channel through the backflush solenoid valve.

[0054] The backflush solenoid valve can control the opening and closing of the backflush channel, thereby controlling the gas transportation.

[0055] The cooler is connected with a condensing pipe.

[0056] After the gas is cooled by the cooler, the organic substances in the gas, such as lipids and benzene series, are discharged through the condensing pipe; the lipids and benzene in the gas are condensed and discharged through the condensing pipe, and the black powder may be discharged accordingly due to adhesion.

[0057] The cooled gas is processed by a water separator, and the acidic gas, such as hydrogen fluoride and part of the black powder, is left in the water, and then dehumidified by a dehumidifier and enters the laser oxygen analyzer.

[0058] The monitoring system also includes a control device, and the monitoring system is controlled through the control device.

[0059] The control device is mainly for facilitating manual operation and control of the monitoring system.

[0060] The control device includes a flow control unit and a humidity alarm unit. The flow control unit is used to regulate the gas flow in the monitoring system, and the humidity alarm unit is used to stop the sampling probe device from sampling and output an alarm signal at the same time.

[0061] The flow control unit transports the nitrogen gas in the gas storage tank to the backflush channel and distributes it to the inner blow port and the outer blow port respectively. When the moisture in the system suddenly increases or the cooler fails, the humidity alarm unit will stop the sampling probe device from sampling and output an alarm signal to prevent impurities such as moisture from entering the inside of the monitoring system and effectively protect the analytical instrument, etc.

[0062] The utility model provides an oxygen content monitoring system applicable to cell processing. The sample gas is sampled through the sampling probe rod and enters the sampling probe device. After being filtered by a high-precision filter, heated by a probe heater and purged by a nitrogen device, it enters the heated sampling pipe, and then enters the separation device. The organic matter is removed by the cooler, the acidic gas and the remaining black powder are discharged through the water separator, and the water and dust are discharged through the dehumidifier. The gas that meets the requirements enters the laser oxygen analyzer to analyze and monitor the oxygen content.

[0063] According to the disclosure and teachings of the above specification, those skilled in the art to which the utility model pertains can also make changes and modifications to the above embodiments. Therefore, the utility model is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the utility model should also fall within the protection scope of the claims of the utility model. In addition, although some specific terms are used in this specification, these terms are only for convenience of description and do not constitute any limitation to the utility model.

Claims

1. An oxygen content monitoring system applicable to battery cell processing, which is arranged in the conveying channel of a lithium battery recycling line; characterized in that, it includes a nitrogen device, a sampling probe device, a heated sampling pipe, a separation device, and a laser oxygen analyzer; the sampling probe device is communicated with the conveying channel of the lithium battery recycling line, and there is a backflush channel between the nitrogen device and the sampling probe device and they are communicated through the backflush channel; the separation device includes a cooler, a water separator, and a dehumidifier that are connected in sequence, and the dehumidifier is also communicated with the laser oxygen analyzer; The nitrogen device transports nitrogen to the sampling probe device through the backflush channel. The sampling probe device samples the gas from the conveying channel of the lithium battery recycling line. After passing through the sampling probe device, the heated sampling pipe, and the separation device in sequence, it enters the laser oxygen analyzer, and the gas is processed and monitored by the laser oxygen analyzer.

2. The oxygen content monitoring system applicable to cell processing according to claim 1, wherein, The sampling probe device includes a sampling probe rod, a high-precision filter, a probe heater, and a protective box. The sampling probe rod, the high-precision filter, and the probe heater are arranged in the protective box.

3. An oxygen content monitoring system applicable to cell processing according to claim 2, characterized in that, The sampling probe device includes a first sampling probe device and a second sampling probe device. The nitrogen device is communicated with the first sampling probe device and the second sampling probe device respectively through the backflush channel; the sampling probe rod is connected to the high-precision filter, and the probe heater heats the inside of the protective box.

4. The oxygen content monitoring system applicable to cell processing according to claim 2, wherein The sampling probe device is provided with an outer blowing port and an inner blowing port, and the backflush channel is sleeved outside the outer outlet and the inner outlet.

5. The oxygen content monitoring system applicable to cell processing according to claim 4, characterized in that, The outer blowing port is communicated with the outside of the high-precision filter, and the inner blowing port is communicated with the inside of the high-precision filter; nitrogen enters the sampling probe device through the inner blowing port and the outer blowing port respectively for purging and then flows out into the conveying channel of the lithium battery recycling line.

6. The oxygen content monitoring system applicable to cell processing according to claim 1, characterized in that The nitrogen device includes an air filter and a gas storage tank, and the air filter is communicated with the gas storage tank; the compressed nitrogen is filtered by the air filter and then stored in the gas storage tank, and enters the backflush channel from the gas storage tank.

7. An oxygen content monitoring system applicable to cell processing according to claim 6, characterized in that, The nitrogen device is also provided with a backflush solenoid valve, and the gas in the gas storage tank is controlled to be transported to the backflush channel through the backflush solenoid valve.

8. The oxygen content monitoring system applicable to cell processing according to claim 1, characterized in that, The cooler is connected with a condensing pipe.

9. The oxygen content monitoring system applicable to battery cell processing according to claim 1, wherein The monitoring system further includes a control device, and the monitoring system is controlled by the control device.

10. The oxygen content monitoring system applicable to cell processing according to claim 9, wherein, The control device includes a flow control unit and a humidity alarm unit. The flow control unit is used to regulate the gas flow in the monitoring system, and the humidity alarm unit is used to stop the sampling probe device from sampling and output an alarm signal at the same time.

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