Waste gas incineration device for recycling lithium iron phosphate material battery

Abstract

The utility model discloses a waste gas incinerator for recycling lithium iron phosphate material batteries, which relates to the technical field of waste gas incinerators for recycling batteries, and comprises a buffer tank, the buffer tank is communicated with an incinerator and waste gas through pipelines, the incinerator is communicated with a bag-type dust collector through a pipeline, and the bag-type dust collector is communicated with a bag-type dust collector through a pipeline. An induced draft fan is arranged on one side of the bag-type dust collector, a chimney is arranged on one side of the induced draft fan, an atomizing spray gun is installed between the incinerator and the bag-type dust collector, the atomizing spray gun is communicated with a temperature reduction water pump and compressed air through pipelines, a temperature reduction water storage tank is arranged on one side of the temperature reduction water pump, and the temperature reduction water storage tank is connected with tap water through a pipeline. According to the scheme, the problems that in the prior art, the waste gas treatment device for battery recycling is simple in treatment process, waste gas contains various organic and inorganic gases, the purification quality cannot be guaranteed to the maximum extent, and therefore emission does not reach the standard, and follow-up emission is affected are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of waste gas incineration devices for battery recycling, and particularly relates to a waste gas incineration device for recycling lithium iron phosphate material batteries. Background Technique

[0002] The lithium iron phosphate battery is a lithium-ion battery that uses lithium iron phosphate as the positive electrode material and carbon as the negative electrode material. The rated voltage of a single cell is 3.2V, and the charging cut-off voltage is 3.6V - 3.65V. During the charging process, some lithium ions in the lithium iron phosphate escape, are transferred through the electrolyte to the negative electrode, and are embedded in the negative electrode carbon material; at the same time, electrons are released from the positive electrode, reach the negative electrode through the external circuit, and maintain the balance of the chemical reaction. During the discharging process, lithium ions escape from the negative electrode, reach the positive electrode through the electrolyte, and at the same time the negative electrode releases electrons, which reach the positive electrode through the external circuit to provide energy for the outside world. It needs to be recycled after being discarded;

[0003] For example, the Chinese authorized patent with the publication number CN216604661U (a waste gas treatment device for lithium battery recycling): includes: a waste gas collection box, which has an air inlet end and an air outlet end, and the air inlet end is arranged in the lithium battery recycling workshop; a series pipeline; one end of the series pipeline is a closed structure, and the other end is an open structure, and the open structure of the series pipeline is communicated with the air outlet end; an activated carbon filtration component, which includes a driving member and a housing, and a filtration device is arranged inside the housing, and the driving member is used to drive the filtration device to rotate inside the housing; an exhaust pipeline, the air outlet of the activated carbon filtration component is communicated with the exhaust pipeline, and the air inlet of the activated carbon filtration component is communicated with the series pipeline; an air suction device, which is connected to the air outlet of the exhaust pipeline, improves the adsorption effect, and is beneficial to reducing environmental pollution.

[0004] However, the waste gas treatment device for battery recycling in the above-mentioned prior art has a simple treatment process, and the waste gas contains a variety of organic and inorganic gases, and it is impossible to ensure the purification quality to the greatest extent, resulting in non-compliant emissions and affecting subsequent emissions; Therefore, it does not meet the existing requirements, and for this reason, we propose a waste gas incineration device for recycling lithium iron phosphate material batteries. Content of the Utility Model

[0005] The purpose of the present utility model is to provide a waste gas incineration device for recycling lithium iron phosphate material batteries, so as to solve the problems in the above-mentioned background technique that the waste gas treatment device for battery recycling in the prior art has a simple treatment process, the waste gas contains a variety of organic and inorganic gases, and it is impossible to ensure the purification quality to the greatest extent, resulting in non-compliant emissions and affecting subsequent emissions.

[0006] To achieve the above object, the utility model provides the following technical solution: An exhaust gas incineration device for lithium iron phosphate material battery recycling, including a buffer tank, the buffer tank is connected to an incinerator and the exhaust gas through pipelines, the incinerator is connected to a bag filter through pipelines, an induced draft fan is arranged on one side of the bag filter, a chimney is arranged on one side of the induced draft fan, and an atomizing spray gun is installed between the incinerator and the bag filter.

[0007] Preferably, the atomizing spray gun is connected to a desuperheating water pump and compressed air through pipelines, a desuperheating water storage tank is arranged on one side of the desuperheating water pump, and the desuperheating water storage tank is connected to tap water through pipelines.

[0008] Preferably, the incinerator is connected to an oxygen supply fan through pipelines, a burner is installed on the incinerator, the burner is connected to natural gas through pipelines, an exhaust gas burner is arranged on one side of the incinerator, an explosion-proof port is arranged on one side of the top of the incinerator, a gas transmission port is arranged on the other side of the incinerator, a support frame is arranged at the bottom of the incinerator, and a maintenance door is arranged on the front end face of the incinerator.

[0009] Preferably, an air inlet is arranged on one end face of the bag filter, and an air outlet is arranged on the other end face of the bag filter.

[0010] Preferably, a detection port is arranged on one end face of the chimney, and an emission pipe is arranged on the top of the chimney.

[0011] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0012] 1. By setting a buffer tank, an incinerator, and a burner, since the exhaust gas contains organic gases of various components, an organic waste gas incinerator is configured for the organic gases to perform high-temperature incineration and cracking on the organic components in the exhaust gas. The device uses natural gas to generate a high-temperature flame of 650-750°C in the combustion chamber of the incinerator to completely burn the VOCs introduced into the combustion chamber, and finally decompose them into CO2 and H2O. By adjusting the amount of combustion-supporting air, it is ensured that the exhaust gas is completely burned and the combustion temperature in the furnace is maintained. The volume of the furnace is determined according to the residence time of the incineration flue gas in the furnace and the volumetric heat load to ensure that the organic matter in the exhaust gas is completely burned and decomposed in the furnace. The exhaust gas incineration device is placed near the steel structure platform. On the one hand, by reducing the exhaust air duct, the deposition of exhaust gas components containing colloid on the inner wall of the pipe is effectively reduced, and at the same time, it is beneficial to the steady flow and pressure stabilization of the overall exhaust gas, which is conducive to the stable operation of the exhaust gas treatment equipment. On the other hand, the occupied space of the equipment is minimized, and the three-dimensional layout effectively utilizes the existing space position, solving the problems in the prior art that the process of the exhaust gas treatment device for battery recycling is simple, the exhaust gas contains various organic and inorganic gases, and the purification quality cannot be guaranteed to the greatest extent, resulting in non-compliance emissions and affecting subsequent emissions.

[0013] 2. A flue gas purification system is formed by setting up a bag filter and a desuperheating water storage tank. The high-temperature purified air coming out of the incinerator enters the box-type bag filter after cooling, removing the fine dust remaining in the flue gas. The qualified flue gas directly enters the chimney for emission. Before entering the dust collector, the temperature of the flue gas is rapidly reduced by using an atomizing spray gun. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall process of the waste gas incineration device for recycling of the present utility model;

[0015] Figure 2 It is an enlarged schematic diagram of the structure of the incinerator of the present utility model;

[0016] Figure 3 It is an enlarged schematic diagram of the structure of the bag filter of the present utility model;

[0017] Figure 4 It is an enlarged schematic diagram of the structure of the chimney of the present utility model;

[0018] In the figure: 1. Buffer tank; 2. Incinerator; 3. Bag filter; 4. Induced draft fan; 5. Chimney; 6. Desuperheating water storage tank; 7. Desuperheating water pump; 8. Oxygen supply fan; 9. Atomizing spray gun; 10. Waste gas burner; 11. Burner; 12. Inspection door; 13. Explosion-proof port; 14. Gas transmission port; 15. Support frame; 16. Air inlet; 17. Exhaust port; 18. Discharge pipe; 19. Detection port. SPECIFIC EMBODIMENTS

[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0020] Please refer to Figures 1-4, An embodiment provided by the present utility model: An exhaust gas incineration device for the recovery of lithium iron phosphate material batteries, including a buffer tank 1, the buffer tank 1 is connected to an incinerator 2 and the exhaust gas through pipelines, the incinerator 2 is connected to a bag filter 3 through pipelines, an induced draft fan 4 is arranged on one side of the bag filter 3, a chimney 5 is arranged on one side of the induced draft fan 4, an atomizing spray gun 9 is installed between the incinerator 2 and the bag filter 3. By setting the buffer tank 1, the incinerator 2, and the burner 11, since the exhaust gas contains various components of organic gases, an organic waste gas incinerator 2 is configured for the organic gases to perform high-temperature incineration cracking on the organic components in the exhaust gas. The device uses natural gas to generate a high-temperature flame of 650 - 750 °C in the combustion chamber of the incinerator to completely burn the VOCs mixed into the combustion chamber in the flame area, and finally decompose them into CO2 and H2O. By adjusting the amount of combustion-supporting air, it is ensured that the exhaust gas is completely burned and the combustion temperature in the furnace is maintained. The volume of the furnace is determined according to the residence time of the incineration flue gas in the furnace and the volumetric heat load to ensure that the organic matter in the exhaust gas is completely burned and decomposed in the furnace. The exhaust gas incineration device is placed near the steel structure platform. On the one hand, by reducing the exhaust and ventilation pipelines, the deposition of exhaust gas components containing colloid on the inner wall of the pipeline is effectively reduced, and at the same time, it is beneficial to the steady flow and pressure stabilization of the overall exhaust gas, which is conducive to the stable operation of the exhaust gas treatment equipment. On the other hand, the equipment occupation space is minimized to the greatest extent, and the three-dimensional layout effectively utilizes the existing space position, solving the problem that the exhaust gas treatment device for battery recycling in the prior art has a simple treatment process, and the exhaust gas contains various organic and inorganic gases, and it is impossible to ensure the purification quality to the greatest extent, resulting in unqualified emissions and affecting subsequent emissions.

[0021] Please refer to Figures 1-4 , the atomizing spray gun 9 is connected to a desuperheating water pump 7 and compressed air through pipelines, a desuperheating water storage tank 6 is arranged on one side of the desuperheating water pump 7, and the desuperheating water storage tank 6 is connected to tap water through pipelines.

[0022] Please refer to Figures 1-4 , the incinerator 2 is connected to a make-up oxygen fan 8 through pipelines, a burner 11 is installed on the incinerator 2, the burner 11 is connected to natural gas through pipelines, an exhaust gas burner 10 is arranged on one side of the incinerator 2, an explosion-proof port 13 is arranged on one side of the top of the incinerator 2, a gas transmission port 14 is arranged on the other side of the incinerator 2, a support frame 15 is arranged at the bottom of the incinerator 2, a maintenance door 12 is arranged on the front end face of the incinerator 2. The incinerator 2 has a function that it cannot be ignited without excluding explosive gases before startup to prevent gas explosion. An artificial fire viewing hole and a flame detector are set to facilitate the observation and monitoring of the flame situation. Once the flame goes out or the ignition fails in the furnace, the supply is immediately cut off, and the alarm system is perfect, which is safe and reliable.

[0023] Please refer to Figures 1-4 , an air inlet 16 is arranged on one side end face of the bag filter 3, and an exhaust outlet 17 is arranged on the other side end face of the bag filter 3.

[0024] Please refer to Figures 1-4 , a detection port 19 is provided on one end face of the chimney 5, and an exhaust pipe 18 is provided on the top of the chimney 5.

[0025] Working principle: During use, first the operator turns on the fan to purge the residual gas in the system, and then starts the burner 11 attached to the incinerator 2. When the temperature in the furnace reaches the set temperature, the waste gas is sprayed into the furnace through the waste gas delivery system for combustion. By adjusting the fuel consumption of the burner 11, the furnace is maintained at 650 - 750 °C to ensure the full combustion of the waste. According to the principles of combustion temperature, time, and eddy current, the waste is fully oxidized, pyrolyzed, and burned in the combustion chamber of the furnace body, so that the organic harmful substances in the flue gas are completely destroyed and transformed into CO2, H2O, SO2, and NOX gases. The high-temperature flue gas that has been fully burned in the combustion chamber first passes through the atomizing spray gun 9 for water cooling, and then passes through the bag filter 3 to remove dust. The qualified flue gas is discharged into the atmosphere through the chimney 5 by the induced draft fan 4. To ensure the uniform and stable pressure in each roller kiln body of each system, a set of gas pressure buffer tank 1 device is configured on the main pipeline. On the one hand, the buffer tank 1 equalizes the flow and pressure of the gas in each air duct. The buffer tank 1 is configured with key instrument parameter control, and a discharge port and a cleaning port are provided at the bottom. At the same time, an explosion-proof membrane is provided on the buffer tank 1 to ensure the safety and reliability of the equipment. And through PLC programming, automatic ignition, automatic purging function, automatic control start, and the purging instruction can be issued through the function buttons of the on-site explosion-proof operation box, or it can be an instruction signal from the PLC system. The incinerator 2 is equipped with a thermocouple to timely reflect the temperature in the furnace and facilitate timely adjustment of the combustion-supporting air volume. A pressure transmitter is also provided at the outlet of the incinerator 2 to adjust the induced draft fan 4.

[0026] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-described exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be encompassed within the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. A waste gas incineration device for recycling lithium iron phosphate battery, comprising a buffer tank (1), characterized in that: The buffer tank (1) is connected to the incinerator (2) and the exhaust gas through a pipeline, the incinerator (2) is connected to the bag dust collector (3) through a pipeline, an induced draft fan (4) is provided on one side of the bag dust collector (3), a chimney (5) is provided on one side of the induced draft fan (4), and an atomizing spray gun (9) is installed between the incinerator (2) and the bag dust collector (3).

2. A waste gas incineration device for recycling lithium iron phosphate battery according to claim 1, characterized in that: The atomizing spray gun (9) is connected to the cooling water pump (7) and the compressed air through a pipeline. A cooling water storage tank (6) is provided on one side of the cooling water pump (7). The cooling water storage tank (6) is connected to the tap water through a pipeline.

3. A waste gas incineration device for recycling lithium iron phosphate battery according to claim 1, characterized in that: The incinerator (2) is connected to the oxygen supplementing fan (8) through a pipeline. A burner (11) is installed on the incinerator (2), and the burner (11) is connected to the natural gas through a pipeline.

4. A waste gas incineration device for recycling lithium iron phosphate battery according to claim 1, characterized in that: A waste gas burner (10) is arranged on one side of the incinerator (2), an explosion-proof opening (13) is arranged on one side of the top of the incinerator (2), and a gas delivery port (14) is arranged on the other side of the incinerator (2).

5. A waste gas incineration device for recycling lithium iron phosphate battery according to claim 1, characterized in that: A support frame (15) is provided at the bottom of the incinerator (2), and an inspection door (12) is provided at the front end surface of the incinerator (2).

6. A waste gas incineration device for recycling lithium iron phosphate battery according to claim 1, characterized in that: An air inlet (16) is provided on one end surface of the bag-type dust collector (3), and an air outlet (17) is provided on the other end surface of the bag-type dust collector (3).

7. A waste gas incineration device for recycling lithium iron phosphate battery according to claim 1, characterized in that: A detection port (19) is arranged on one end surface of the chimney (5), and a discharge pipe (18) is arranged on the top of the chimney (5).

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