KR102618272B1 - Eco-friendly gas processing system - Google Patents

Abstract

The present invention relates to an eco-friendly gas processing system, and includes a pyrolysis unit 110 connected to one side of a heat treatment system 10 for recycling waste batteries and equipped to input waste gas to perform a pyrolysis reaction and separate gas and solid; An external air supply unit 120 connected to the upper side of the pyrolysis unit 110 to receive pyrolyzed gas and supply external air, and an external air supply unit 120 connected to the external air supply unit 120 to receive oxygen and waste battery components contained in the gas. A combustion gas recovery unit 130, which is equipped to completely burn and recover combustion gas, and a waste heat recovery unit 140, which is connected to the combustion gas recovery unit 130 to receive combustion gas, remove oxides, and recover waste heat. ) and a neutralization discharge unit 150 connected to the waste heat recovery unit 140 to receive combustion gases, neutralize acidic substances, and then discharge them. On one side of the combustion gas recovery unit 130, the recovery By including a gas re-injection module 133 that is equipped to recycle CO, CO ₂ , and N ₂ contained in the combustion gas into the heat treatment system 10, the environmental load is minimized and the recovery rate of valuable metals is improved. Its characteristic is that it can be promoted.

Description

Eco-friendly gas processing system{ECO-FRIENDLY GAS PROCESSING SYSTEM}

The present invention relates to an eco-friendly gas processing system, and more specifically, to a series of systems that treat waste gas generated in a heat treatment process for recovering complex compounds containing valuable metals from medium to large-sized waste batteries so that they can be recycled in the heat treatment process. It is about an eco-friendly gas processing system that can minimize environmental load and improve the recovery rate of valuable metals by configuring.

In general, a secondary battery is a battery that can be repeatedly charged and discharged. The battery cell, which is the smallest unit, consists of a positive electrode material, a negative electrode material, an electrolyte, and a separator in a container. When charging, lithium ions pass from the positive electrode to the negative electrode through the separator. and moves from the cathode to the anode during discharge.

The cathode materials for secondary batteries include cathode active materials such as nickel, manganese, cobalt, and aluminum. The negative electrode material used is graphite and carbon. The electrolyte consists of a lithium salt made of lithium, phosphoric acid, and fluorine, and an organic solvent.

Meanwhile, due to the recent expansion of the electric vehicle market and increased use of energy storage systems (ESS), the amount of secondary batteries discarded after use is expected to increase exponentially, and concerns are growing about how to dispose of waste batteries.

Accordingly, the development of technologies for recovering and recycling valuable metal active materials such as lithium, nickel, manganese, and cobalt contained in waste batteries is actively underway. As an example of a known technology, Korean Patent No. 10 - 0425554 A low-temperature heating step of heating the waste lithium-ion battery, a high-speed cutting step of dismantling and separating the plastic package from the waste lithium-ion battery, a specific gravity sorting step of separating the plastic package and other residues, and the separated unit battery into iron scrap. Charge and treat at high temperature to remove organic electrolyte, organic separator, and carbon, and separate into metal mat mainly composed of iron and nickel at the bottom and oxide powder mainly composed of cobalt, aluminum, copper, etc. suspended on it by the difference in specific gravity. A method for recovering valuable metals from waste lithium-ion batteries is comprised of a high-temperature heat treatment step for concentration.

As another example, Korean Patent No. 10 - 2021 - 0077962 includes the steps of discharging a battery cell and separating it into a positive electrode plate, a separator, and a negative electrode plate, obtaining a positive electrode plate from the separated battery cell, and separating the battery cell from the battery cell. A method for recovering valuable metals from a battery cell includes the steps of cutting the anode plate and pulverizing it through a ball mill, and heat treating the pulverized anode plate at a temperature of 400 to 600°C for 30 minutes to 1.5 hours. .

In this way, in order to recover valuable metals by recycling waste batteries, it is necessary to separate the cathode material coated on the electrode plates, so generally, the binder, electrolyte, and separator inside the waste battery are burned or pyrolyzed through a high-temperature heat treatment process. This is pulverized and classified to obtain a positive and negative electrode mixture in powder form.

In particular, the exhaust gas generated in the heat treatment process contains materials pyrolyzed from electrolyte, binder, separator, etc., so separate environmental treatment is required. For example, as known in Korean Patent No. 10-2117255, it must be separated from the waste gas inlet. a burner main body arranged so as to be able to do so, a fuel gas supply pipe communicating with the burner main body to supply fuel gas and a first oxidant to the inside, an oxidant supply pipe communicating with the burner main body to supply a second oxidant to the inside, and A method of burning gas using a burner device for waste gas incineration, which is located at the rear end of the fuel gas supply pipe and includes two or more types of nozzle units to control the flow of fuel gas and oxidant, is commonly used.

Korean Patent No. 10 - 0425554 (2004.04.03) Korean Patent No. 10 - 2021 - 0077962 (2021.06.28) Korean Patent No. 10 - 2117255 (2020.06.02) Korean Patent No. 10 - 0637680 (2006.10.24)

As described above, in order to recover valuable metals by recycling waste batteries, it is necessary to separate the cathode material coated on the electrode plate, so it generally undergoes a high-temperature heat treatment process.

Exhaust gas generated in the heat treatment process of waste batteries contains materials pyrolyzed from electrolytes, binders, separators, etc., so separate environmental treatment is required. In the conventional technology, the exhaust gas is connected to an incineration facility for treatment.

The waste gas incineration facility according to the prior art uses carbon-containing fuel such as LNG as a heating source through an incinerator in the form of a burner, reacts with oxygen to completely combust, and then passes through environmental reduction facilities such as a dust collector for final discharge. It consists of:

However, burner-type incineration facilities according to the prior art are generally built as large facilities and require enormous costs for maintenance and operation due to the risk of handling fuel used as a heating source.

In addition, waste gas incineration facilities according to the prior art continuously generate carbon dioxide in the process of consuming fuel, so there is a need for improvement in environmental aspects such as carbon reduction.

Accordingly, the present invention was invented to solve the problems of the prior art as described above.

A pyrolysis unit 110 connected to one side of a heat treatment system for recycling waste batteries and equipped to inject waste gas to perform a pyrolysis reaction and separate gas and solid;

An outdoor air supply unit 120 connected to the upper side of the pyrolysis unit 110 to receive pyrolyzed gas and supply outdoor air,

A combustion gas recovery unit 130 connected to the outside air supply unit 120 to receive oxygen and completely combust waste battery components contained in the gas to recover combustion gas;

A waste heat recovery unit 140 connected to the combustion gas recovery unit 130 to receive combustion gas, remove oxides, and recover waste heat;

It includes a neutralization discharge unit (150) connected to the waste heat recovery unit (140) to receive combustion gases, neutralize acidic substances, and then discharge them,

On one side of the combustion gas recovery unit 130,

It is configured to minimize the environmental load and improve the recovery rate of valuable metals by including a gas re-introduction module 133 that is equipped to recycle CO, CO ₂ , and N ₂ contained in the recovered combustion gas into the heat treatment system. It is possible to achieve the desired goal.

The present invention provides an eco-friendly gas treatment system that processes waste gas generated in a heat treatment process for recovering complex compounds containing valuable metals from medium to large-sized waste batteries so that they can be recycled in the heat treatment process.

The present invention excludes elements that hinder process yield by constructing a gas processing system that is differentiated from general waste gas incineration facilities that use carbon-containing fuel, more efficiently and completely burns organic substances contained in waste gas, and removes organic substances contained in combustion gas. This has the effect of allowing some of the ingredients to be actively utilized by re-introducing them into the heat treatment process.

Therefore, the present invention not only makes it possible to build an economical and safe system compared to conventional waste gas incineration facilities, but also increases the recovery rate of valuable metals through a waste battery recycling system and significantly reduces carbon emissions to minimize environmental load, making it more eco-friendly. There is an advantage in providing an efficient gas processing system.

1 is a block diagram of an eco-friendly gas processing system according to the present invention.
Figure 2 is a schematic diagram of an eco-friendly gas processing system according to the present invention.
Figure 3 is a process flow diagram of a gas processing method using an eco-friendly gas processing system according to the present invention.

Hereinafter, the configuration and operation of the preferred embodiment of the eco-friendly gas processing system of the present invention will be described in detail with reference to the accompanying drawings. In the following description, detailed descriptions of parts that can be easily implemented by those skilled in the art may be omitted.

The eco-friendly gas processing system to which the technology of the present invention is applied reduces the environmental load by constructing a series of systems that allow waste gases generated in the heat treatment process to recover complex compounds containing valuable metals from medium to large-sized waste batteries to be recycled in the heat treatment process. Please note that this is a technology that seeks to minimize and improve the recovery rate of valuable metals.

For this purpose, the eco-friendly gas processing system of the present invention largely includes a pyrolysis unit 110, an outside air supply unit 120, a combustion gas recovery unit 130, a waste heat recovery unit 140, and a neutralization discharge unit 150. It is comprised and specifically included as follows.

The pyrolysis unit 110 is connected to one side of the heat treatment system 10 for recycling waste batteries and is equipped to input waste gas to perform pyrolysis reaction and separate gas and solid.

The heat treatment system for recycling waste batteries is equipped to remove the electrical energy remaining in waste batteries through discharge, shred them through a crushing process, and then perform a heat treatment process of approximately 400°C or higher to separate the positive electrode material coated on the electrode plates. do.

The pyrolysis unit 110 is configured to preemptively separate and remove powder and pyrolyze organic substances by inputting waste gas generated from the heat treatment system 10 as described above, and includes a pyrolysis reaction module 111 and a reaction heating module. (112), gas transfer module 113, and powder discharge module 114.

The thermal decomposition reaction module 111 has a chamber structure in which the middle portion has a larger diameter than the upper and lower portions.

The thermal decomposition reaction module 111 is configured to receive waste gas from the heat treatment system 10, additionally thermally decompose organic substances contained in the waste gas, and separately separate dust present in the gas.

The thermal decomposition reaction module 111 is equipped with a reaction heating module 112, which will be described later, and is equipped in the form of a reactor equipped with insulated and heat-insulating pipes to fundamentally exclude liquefaction due to heat loss of the thermal decomposition material and cause the thermal decomposition reaction. It is structured to promote.

The thermal decomposition reaction module 111 has a diameter that expands from the top to the middle and decreases from the middle to the bottom, forming a structure that compensates for temperature decrease, so that fine powder is not accumulated inside and is discharged efficiently. do.

A gas concentration measurement sensor is installed inside the thermal decomposition reaction module 111 to monitor the concentrations of oxygen and nitrogen for thermal decomposition and to maintain the interior in an inert atmosphere in conjunction with a nitrogen input control unit provided on the pipe.

The reaction heating module 112 is installed on the entire wall of the thermal decomposition reaction module 111 to generate heat and create an insulating state.

The reaction heating module 112 is composed of a heating type heating element using electricity, and is configured to control the temperature of the thermal decomposition reaction module 111 according to a set section by selectively applying, for example, a net-type, tubular, or coil-type heater. .

The reaction heating module 112 can be installed inside or outside the thermal decomposition reaction module 111, but considering the possibility of short circuit due to dust inside, it is preferable to install and control it outside.

The gas transfer module 113 is mounted on the upper part of the thermal decomposition reaction module 111 to suction and transfer the rising gas.

The gas transfer module 113 forms a pipe to suction and transfer the gas from which the powder has been separated from the upper part of the thermal decomposition reaction module 111, and a temperature measurement sensor is installed in the central part to determine the reaction heating module 112 according to the measured temperature. ) Configure the output to be automatically controlled.

The powder discharge module 114 is mounted at the lower end of the thermal decomposition reaction module 111 and forms a double valve structure to discharge powder while maintaining internal air pressure.

The powder discharge module 114 is provided to separately recover the powder contained in the waste gas input to the thermal decomposition reaction module 111 to an external tank. A two-stage valve type gate valve is mounted between the thermal decomposition reaction module 111 and the powder discharge module 114 to maintain air flow by maintaining internal air pressure when discharging powder.

In the present invention, when arranging the pyrolysis unit 110, it is composed of a plurality of pyrolysis units 110 of a multi-stage structure in which the temperature is gradually increased for each temperature section in the range of 400 to 800 ° C.

The plurality of pyrolysis units 110 are configured in successive multiple stages by differentially setting temperature sections by each reaction heating module 112, thereby additionally pyrolyzing fine powder and separated gaseous organic materials for each temperature section to produce combustion gas, which will be described later. It is configured to maximize complete combustion efficiency by the recovery unit 130.

The internal temperature range of the plurality of pyrolysis units 110 is configured to operate, for example, by setting the first pyrolysis unit 110a to a range of 400 to 600°C and the second pyrolysis unit 110b to a range of 600 to 800°C.

The outside air supply unit 120 is connected to the upper side of the pyrolysis unit 110 to receive pyrolyzed gas and supply outside air.

The outside air supply unit 120 supplies oxygen necessary for combustion in the process of separating the powder through the pyrolysis unit 110 and transferring the pyrolyzed gas through a connection pipe to the combustion gas recovery unit 130, which will be described later. It is provided to enable complete combustion and includes a blower module 121 and an outdoor heating module 122.

The blower module 121 is provided to blow outside air by forming an air duct structure coupled to the connecting pipe of the thermal decomposition unit 110 and the combustion gas recovery unit 130.

The blower module 121 is configured to supply outside air into the connecting pipe by mounting a predetermined air fan on one side of the air duct structure. The air fan is configured to control the air volume through an inverter.

A temperature measurement sensor, a pressure potentiometer 123, a backflow prevention valve 124, and an oxygen concentration measurement module 125 are mounted on the front and rear sides of the blower module 121.

The pressure potentiometer 123 and the backflow prevention valve 124 are provided to control the airflow of the transported gas and supplied external air.

The partial pressure meter 123 is provided to control the supply amount of external air (oxygen) by measuring the partial pressure of each component constituting the gas. The backflow prevention valve 124 is provided so that the direction of gas transfer by blowing outside air can be controlled by the combustion gas recovery unit 130, which will be described later.

The oxygen concentration measurement module 125 is provided to measure the oxygen concentration of the gas input to the combustion gas recovery unit 130 and the combustion gas recovered, respectively, to adjust the supply amount of outside air.

The outside air heating module 122 is coupled to one side of the blower module 121 to heat the outside air and prevent temperature cooling of the gas transferred from the pyrolysis unit 110.

The outside air heating module 122 is composed of a heating element using electricity to prevent the high-temperature gas transported through the pyrolysis unit 110 from being cooled by the supply of outside air, thereby reducing combustion efficiency, and to keep it in a high temperature state, which will be described later. It is configured to be transferred to the combustion gas recovery unit 130.

The combustion gas recovery unit 130 is connected to the outside air supply unit 120 to receive oxygen and completely combust waste battery components contained in the gas to recover combustion gas.

The combustion gas recovery unit 130 receives gas and oxygen from pyrolyzed organic materials through the pyrolysis unit 110 and the outside air supply unit 120, retains the air current at a high temperature, and binds and electrolyte unreacted in the previous unit. , pyrolysis materials such as separators are completely burned, and part of the treated combustion gas is configured to be reusable in the heat treatment system 10 for recycling waste batteries, and includes an airflow transfer module 131, an airflow heating module 132, Includes a gas re-introduction module (133).

The airflow transfer module 131 is provided with an inlet and an outlet, and forms an airflow channel inside to transfer external air and gas.

The airflow transfer module 131 is configured to secure residence time during transfer by arranging, for example, a zigzag-shaped flow path inside.

The airflow heating module 132 is mounted on the wall of the airflow transfer module 131 and is heated to a higher temperature than the pyrolysis unit 110 to maximize thermal efficiency to achieve complete combustion. A temperature measurement sensor and a gas concentration measurement sensor are installed on the outlet side of the airflow heating module 132 to enable control of the direction of combustion gas supply to the gas re-injection module 133 or waste heat recovery unit 140, which will be described later. .

The combustion gas recovery unit 130 performs a combustion reaction of pyrolysis materials such as binders, electrolytes, and separators contained in oxygen-containing outdoor air and gas in the range of 1000 to 1100°C by the airflow heating module 132, producing CO , CO ₂ , and N ₂ are configured to be generated.

The gas reintroduction module 133 is provided to form a connection pipe from one side of the combustion gas recovery unit 130 to the heat treatment system 10 for recycling waste batteries.

The gas re-introduction module 133 is configured to recycle CO, CO ₂ , and N ₂ contained in the combustion gas recovered by the combustion gas recovery unit 130 by injecting them into the heat treatment system 10.

The gas re-introduction module 133 is a combustion gas input to the heat treatment system 10 by the amount of outside air supplied controlled according to the oxygen concentration measured by the oxygen concentration measurement module 125 provided in the outside air supply unit 120. can be controlled.

The CO and CO ₂ gases reintroduced into the heat treatment system 10 by the gas reintroduction module 133 react with lithium contained in the cathode material of the spent battery and are converted into lithium carbonate. N ₂ gas acts as an inert carrier gas within the heat treatment system 10.

The waste heat recovery unit 140 is connected to the combustion gas recovery unit 130 to receive combustion gas, remove oxides, and then recover waste heat, and includes a waste heat recovery module 141 and an SCR reaction module 142. do.

The waste heat recovery module 141 is configured to recover waste heat by heat exchanging combustion gas excluding the gas supplied to the gas re-introduction module 133, and the recovered waste heat is configured to be discharged and utilized in the form of hot water or steam. .

The SCR reaction module 142 is configured to reduce combustion gas containing chemicals such as nitrogen oxides, sulfur oxides, and other volatile organic compounds used in the heat treatment process of waste batteries by reacting with a reduction catalyst.

The neutralization discharge unit 150 is connected to the waste heat recovery unit 140 to receive combustion gases, neutralize acidic substances, and then discharge them, and includes a neutralization reaction module 151 and a gas discharge module 152. do.

The neutralization reaction module 151 forms a scrubber that accommodates combustion gas and sprays a basic compound inside to mix and neutralize acidic substances.

The gas discharge module 152 is configured to discharge the combustion gas that has passed through the neutralization reaction module 151 into the atmosphere of the system in the form of non-harmful oxygen, water vapor, etc.

The gas treatment process using the eco-friendly gas treatment system using the technology of the present invention, which has the above-described configuration, is outlined as follows. The following description describes the present invention by way of preferred embodiments, so the present invention is not limited by the following examples, and it is natural that various modifications may be made without departing from the scope of the present invention. .

The recycling process for medium to large-sized waste batteries is largely comprised of a process (S10) of discharging and separating/disassembling waste batteries by putting them into a discharge system, a process of shredding them to a state that can be heat treated by a shredding system (S20), and a process of shredding them into a state that can be heat treated by a shredding system (S20). It consists of a heat treatment process (S30), a process of crushing/classifying the heat-treated waste battery (S40), and a process of recovering valuable metal materials such as lithium (S50).

The eco-friendly gas treatment process using the system of the present invention is configured to input the waste gas generated in the heat treatment process (S30) into a gas treatment system, go through a series of treatment processes, and discharge or reuse it in an environmentally friendly manner.

1) Gas/solid separation and pyrolysis process (S310) by the multi-stage pyrolysis unit 110

After going through the heat treatment process by the heat treatment system 10 for recycling waste batteries, the risk of ignition is reduced during the heat treatment of gaseous substances in which organic substances such as binders, electrolytes, and separators of waste batteries are thermally decomposed, and combustible substances such as electrolytes. Inert gases such as nitrogen and argon used for suppression are generated, and depending on the oxygen concentration inside the heat treatment system, some complete or incomplete combustion gas is generated, and NOx (nitrogen oxides) and SOx (sulfur oxides) may be discharged as waste gas. there is.

In addition, in waste gas, in addition to gaseous substances, internal heat substances in the form of fine powder move with the gas airflow. When waste gas is collected using existing simple dust collection equipment, gaseous pyrolysis substances are transported inside the facility and through piping during the dust collection process. As it moves, it cools due to heat loss, causing liquefaction and depositing inside the facility with a tar-like consistency. This reduces the speed of the discharged airflow and acts as a serious inhibitor of process yield.

In this thermal decomposition process (S310), the waste gas is input into the thermal decomposition reaction module 111 of the thermal decomposition unit 110, and the organic substances remaining in the waste gas are thermally decomposed at high temperature by the reaction heating module 112. The powder is discharged to the powder discharge module 114 at the bottom of the pyrolysis reaction module 111, and the gas is transferred to the outside air supply unit 120 through the gas transfer module 113 at the top of the pyrolysis reaction module 111.

A plurality of thermal decomposition units 110 are arranged for each temperature section. In an embodiment of the present invention, the primary pyrolysis unit 110a in the 500 to 600°C section and the secondary pyrolysis unit 110b in the 600 to 700°C section are arranged continuously to gradually increase the temperature to reduce heat loss of the pyrolyzed material. It fundamentally excludes the liquefaction phenomenon and promotes the thermal decomposition reaction to maximize combustion efficiency.

2) High-temperature outside air supply process (S320) by the airflow type outside air supply unit (120)

In the process of transporting the gas that has undergone the pyrolysis process through the connection pipe between the pyrolysis unit 110 and the combustion gas recovery unit 130, outside air is supplied by the blower module 121 and the air flow is maintained by the outside air heating module 122. By maintaining it at a high temperature, problems related to cooling and liquefaction are eliminated and combustion efficiency is maximized.

A partial pressure gauge 123 and a backflow prevention valve 124 are mounted on the front and rear sides of the blower module 121 to measure the partial pressure of each component constituting the gas to control the supply amount of external air (oxygen) and to control the supply amount of external air (oxygen) by Controls the transport direction of the aircraft. The oxygen concentration of the gas input to and the combustion gas recovered from the combustion gas recovery unit 130 is measured using the oxygen concentration measurement module 125 to adjust the supply amount of outside air.

3) High-temperature combustion and gas recovery process (S330) by airflow type combustion gas recovery unit (130)

The gas that has gone through the thermal decomposition process and the oxygen from the external air supply process are transferred into the airflow transfer module 131 and heated by the airflow heating module 132 to completely burn the organic substances contained in the gas.

In an embodiment of the present invention, the combustion reaction proceeds at a temperature of 1000 to 1100°C, which is higher than the pyrolysis unit 110, to generate CO, CO ₂ , and N ₂ from pyrolysis materials such as binder, electrolyte, and separator contained in the gas.

It is possible to control the supply direction of combustion gas to the gas re-introduction module 133 or the waste heat recovery unit 140 by using a temperature measurement sensor and a gas concentration measurement sensor provided on the outlet side of the airflow heating module 132.

The gas reintroduction module 133 reintroduces the generated CO, CO ₂ , and N ₂ into the waste battery heat treatment system 10. CO and CO ₂ gas react with lithium contained in the cathode material of a waste battery and are converted into lithium carbonate, thereby increasing the recovery efficiency of lithium and reducing carbon emissions.

N ₂ gas can act as an inert carrier gas within the heat treatment system 10, thereby improving the safety and efficiency of the heat treatment process.

Examples of major reaction equations are as follows.

6LiMeO ₂ + CO ₂ + 2CO = Me + 3MeO + 2MeO ₂ + 3Li ₂ CO ₃ (Me=Ni, Co, Mn)

4) Heat exchange and waste heat recovery process by waste heat recovery unit 140 (S340)

Combustion gas, excluding the gas supplied to the gas re-introduction module 133, is heat-exchanged by the waste heat recovery module 141 and recovered and recycled in the form of hot water, steam, etc., and NOx, SOx, and volatile organic compounds are reduced by reacting with a reduction catalyst.

5) Neutralization and discharge process by neutralization discharge unit 150 (S350)

The gas with reduced harmful components is input into the neutralization reaction module (151), neutralized with a basic compound, and discharged into the atmosphere through the gas discharge module (152).

The eco-friendly gas processing system according to the present invention as described above provides an eco-friendly gas processing system that processes waste gas generated in the heat treatment system 10 for recycling of medium to large-sized waste batteries so that it can be recycled in the heat treatment process.

In particular, the present invention constitutes a gas processing system that is significantly different from general waste gas incineration facilities that use carbon-containing fuel, thereby eliminating factors that hinder conventional process yields and more efficiently and completely burns organic substances contained in waste gas, thereby reducing some of the waste gas incineration facilities. It has the effect of allowing ingredients to be recycled in the heat treatment process.

Therefore, compared to the prior art, the present invention has the advantage of providing a more environmentally friendly gas processing system, such as minimizing the environmental load by significantly reducing carbon emissions while increasing the recovery rate of valuable metals by the waste battery recycling system, and thus has the potential for industrial application. It is expected to be very large.

110: thermal decomposition unit 111: thermal decomposition reaction module
112: Reaction heating module 113: Gas transfer module
114: powder discharge module 120: external air supply unit
121: blower module 122: outdoor heating module
123: Potentiometer 124: Backflow prevention valve
125: Oxygen concentration measurement module 130: Combustion gas recovery unit
131: Airflow transfer module 132: Airflow heating module
133: Gas re-introduction module 140: Waste heat recovery unit
141: Waste heat recovery module 142: SCR reaction module
150: Neutralization discharge unit 151: Neutralization reaction module
152: Gas discharge module 10: Heat treatment system

Claims (7)

A pyrolysis unit (110) connected to one side of the heat treatment system (10) for recycling waste batteries to input waste gas and perform a thermal decomposition reaction to separate gas and solid,
An outdoor air supply unit 120 connected to the upper side of the pyrolysis unit 110 to receive pyrolyzed gas and supply outdoor air,
A combustion gas recovery unit 130 that is connected to the outside air supply unit 120 to receive oxygen and recover combustion gas by completely burning spent battery components, including unreacted binders, electrolytes, and separators contained in the gas, and
A waste heat recovery unit 140 that is connected to the combustion gas recovery unit 130 to receive combustion gas, remove oxides, and recover waste heat;
It includes a neutralization discharge unit (150) connected to the waste heat recovery unit (140) to receive combustion gases, neutralize acidic substances, and then discharge them,
The thermal decomposition unit 110,
A plurality of pyrolysis units including a primary pyrolysis unit (110a) with a temperature range of 400 to 600°C and a secondary pyrolysis unit (110b) with a temperature range from 600 to 800°C are arranged continuously in a multi-stage structure,
The combustion gas recovery unit 130,
Equipped to generate CO, CO ₂ , and N ₂ by inducing a combustion reaction of outdoor air containing oxygen and gas containing the spent battery components in the range of 1000 to 1100°C,
On one side of the combustion gas recovery unit 130,
Eco-friendly, characterized in that it includes a gas re-injection module (133) for recycling CO, CO ₂ and N ₂ contained in the recovered combustion gas by reintroducing them into the heat treatment system (10) for recycling of the waste batteries. Gas processing system. According to claim 1,
The thermal decomposition unit 110,
A thermal decomposition reaction module (111) having a chamber structure in which the middle portion has a larger diameter compared to the upper and lower portions,
A reaction heating module (112) mounted on the entire wall of the thermal decomposition reaction module (111) to generate heat and create an insulating state,
A gas transfer module (113) mounted on the upper part of the thermal decomposition reaction module (111) to suction and transfer the rising gas,
An eco-friendly gas processing system comprising a powder discharge module (114) mounted on the lower part of the thermal decomposition reaction module (111) and forming a double valve structure to discharge powder while maintaining internal air pressure. delete According to claim 1,
The outside air supply unit 120,
A blower module 121 provided to blow outside air by forming an air duct structure coupled to the connecting pipe of the pyrolysis unit 110 and the combustion gas recovery unit 130,
An outdoor air heating module 122 coupled to one side of the blower module 121 to heat the outdoor air and prevent the temperature of the gas transferred from the pyrolysis unit 110 from cooling,
A pressure potentiometer (123) and a backflow prevention valve (124) provided to control the airflow of the transported gas and supplied external air,
An eco-friendly gas processing system comprising an oxygen concentration measurement module (125) configured to control the supply amount of outside air by measuring the oxygen concentration of the gas input to the combustion gas recovery unit (130) and the combustion gas recovered. delete According to claim 1,
The combustion gas recovery unit 130,
An airflow transfer module (131) provided with an inlet and an outlet and forming an airflow flow path inside to transport external air and gas,
An eco-friendly gas processing system comprising an airflow heating module (132) mounted on the wall of the airflow transfer module (131) and heated to a higher temperature than the pyrolysis unit (110) to achieve complete combustion. delete

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