Incineration treatment process method and system for aluminum residues generated after production of triisobutyl aluminum

Abstract

The invention relates to an incineration treatment process method and system for aluminum residues generated after production of triisobutyl aluminum, belongs to the technical field of triisobutyl aluminum, and solves the problems that an existing method is poor in continuity and low in treatment efficiency. Comprising the following steps: quantitatively storing materials in a raw material tank according to the maximum volume of the raw material tank; the raw material tank is subjected to airtightness detection, nitrogen is introduced after airtightness is qualified, and the materials are stirred; all the materials are pressed into a mixing and stirring reaction kettle to be stirred by utilizing nitrogen pressure; the fuel in the incinerator is ignited and combusted; after the materials are stirred, nitrogen is introduced, the materials are continuously pressed into a spray gun through nitrogen pressure, the spray gun sprays the materials into a secondary combustion chamber, an air supply device is started synchronously, and the materials are combusted; judging whether all the materials in the reaction kettle are pressed into the spray gun or not and spraying is completed; residual materials in the spray gun are blown into the secondary combustion chamber for combustion; and releasing the pressure of the mixing and stirring reaction kettle to 0 MPa, reversely blowing the residual materials into the reaction kettle, and closing the system after the blowing is completed. The method is high in treatment efficiency.

Description

Technical Field

[0001] This invention relates to the field of triisobutylaluminum technology, and more particularly to a process and system for incinerating aluminum residue after the production of triisobutylaluminum. Background Technology

[0002] Triisobutylaluminum is an important organoaluminum compound, a colorless and transparent liquid, widely used in organic synthesis, polymer materials and other fields.

[0003] Triisobutylaluminum holds an important position in the chemical industry due to its unique chemical properties and wide range of applications. However, its high reactivity and hazardous nature necessitate adherence to safety regulations during use and storage. The residue generated during its production contains various chemical substances, such as triisobutylaluminum, n-hexane, and aluminum oxide. Direct discharge of these aluminum residues without treatment can cause serious environmental pollution, including soil, water, and air pollution. Furthermore, the aluminum residues contain highly reactive triisobutylaluminum, which is flammable in air and reacts violently with water, releasing flammable alkane gases. If the residues are not properly handled, they may cause fires or explosions, posing a threat to personnel and equipment safety.

[0004] Current treatment processes for aluminum residue after triisobutylaluminum production mainly involve hydrolysis or cement kiln degradation. Hydrolysis is simple, convenient, and low-cost, making it suitable for small-scale processing. However, the main problem is the vigorous reaction between the aluminum residue and water, which releases flammable and explosive gases such as hydrogen, posing a significant safety hazard. Cement kiln degradation requires the distillation separation of hexane and triisobutylaluminum from the aluminum residue as much as possible. Because the aluminum residue releases a large amount of heat upon contact with water, the distillation process requires precise temperature and pressure control, placing extremely high demands on the operator. This results in a time-consuming and labor-intensive process, and the remaining aluminum residue is highly viscous, easily causing blockages and leading to very low processing efficiency.

[0005] The aluminum residue also contains incompletely separated triisobutylaluminum. Furthermore, the residual active aluminum in the reacted aluminum residue is highly susceptible to secondary reactions in the air, causing exothermic reactions. Therefore, traditional incineration processes are not suitable for treating triisobutylaluminum residues, posing significant safety hazards, poor processing continuity, high energy consumption, and high costs.

[0006] Therefore, it is necessary to optimize the high-temperature incineration method for aluminum residues generated after the production of triisobutylaluminum. Summary of the Invention

[0007] Based on the above analysis, the present invention aims to provide a process and system for incinerating aluminum residue after the production of triisobutylaluminum, in order to solve the problems of poor material handling continuity, significant safety hazards, and low processing efficiency of existing high-temperature incineration methods for aluminum residue after triisobutylaluminum production.

[0008] The objective of this invention is mainly achieved through the following technical solutions:

[0009] This invention provides a process for incinerating aluminum residue after the production of triisobutylaluminum, comprising the following steps:

[0010] S1: Based on the maximum volume of the raw material tank, store the on-site materials in the raw material tank in a fixed quantity;

[0011] S2: Perform an airtightness test on the raw material tank. After the airtightness is qualified, introduce nitrogen into the raw material tank through the nitrogen line to purge and agitate the material in the raw material tank, so that the solid and liquid are fully mixed.

[0012] S3: Using the nitrogen pressure in the raw material tank, all the material in the raw material tank is forced into the mixing and stirring reactor through the raw material tank feed line, and the material in the mixing and stirring reactor is fully stirred by the motor;

[0013] S4: Ignite the fuel in the incinerator to keep the fuel burning continuously;

[0014] S5: After the material in the mixing and stirring reactor is stirred, nitrogen gas is introduced into the mixing and stirring reactor for pressurization. After pressurization to the specified pressure range, the pressure in the mixing and stirring reactor is maintained within the specified range. Using the nitrogen pressure in the mixing and stirring reactor, the material in the mixing and stirring reactor is continuously forced into the spray gun device through the material line in the secondary combustion chamber. The spray gun device sprays the material into the secondary combustion chamber, and the air supply device is turned on at the same time. The material is fully combusted in the secondary combustion chamber and the incinerator.

[0015] S6: Determine whether all the material in the mixing and stirring reactor has been pressed into the spray gun and sprayed completely based on whether the liquid level of the material in the mixing and stirring reactor is below the liquid level line.

[0016] S7: After all the material in the mixing and stirring reactor has been pressed into the spray gun and sprayed into the secondary combustion chamber and incinerator for complete combustion, nitrogen is used to purge the remaining material in the spray gun into the secondary combustion chamber for combustion.

[0017] S8: Depressurize the mixing and stirring reactor to 0MPa, use nitrogen to backflush the residual material in the secondary combustion chamber material line into the mixing and stirring reactor, and shut down the system after purging.

[0018] Furthermore, in step S1, the on-site material quantity is ≤ 80% of the maximum volume of the raw material tank.

[0019] Furthermore, in step S2, the nitrogen pressure is 0.4-0.6 MPa.

[0020] Furthermore, in step S3, the motor frequency conversion is 37-66%, and the stirring time is 1-2 hours.

[0021] Furthermore, in step S5, the specified pressure range is 0.2MPa-0.4MPa.

[0022] Furthermore, in step S5, the air supply device supplies air to the spray gun device, and the volume ratio of the supplied air to the material in the air supply device is ≤1:3.

[0023] Furthermore, the diameters of the material inlet line of the raw material tank and the material inlet line of the secondary combustion chamber are equal, and both are ≥DN50;

[0024] The diameter of the nitrogen line is ≥DN20, and is simultaneously smaller than the diameter of the material line from the raw material tank to the reactor and the material line from the secondary combustion chamber.

[0025] Furthermore, the nitrogen line is equipped with a vaporizer inlet valve (1#) and a vaporizer outlet regulating valve (2#). The vaporizer outlet regulating valve (2#) is opened at 20-50% during the aluminum residue incineration process, and the vaporizer inlet valve (1#) is opened at 100% during the aluminum residue incineration process.

[0026] Furthermore, the secondary combustion chamber material line is equipped with a secondary combustion chamber material solenoid valve (18#) and a secondary combustion chamber material inlet solenoid valve (22#), and the opening degree of the secondary combustion chamber material solenoid valve (18#) and the secondary combustion chamber material inlet solenoid valve (22#) is 20-80% during the aluminum residue incineration process.

[0027] The present invention also provides an aluminum residue incineration treatment system after the production of triisobutylaluminum, for implementing the above-mentioned aluminum residue incineration treatment process, including a feeding unit, a processing unit, and a combustion unit;

[0028] The feeding unit includes a cryogenic liquid nitrogen storage tank (1), a raw material tank (3), a vaporizer (10), a nitrogen line (11), and a raw material tank feed line (16);

[0029] The processing unit includes a mixing and stirring reactor (2), which is equipped with a motor (M) and a liquid power supply (8).

[0030] The combustion unit includes an incinerator (6), a secondary combustion chamber (5), a spray gun device (7), an air supply device (4), a secondary combustion chamber material line (17), and a nitrogen backflushing line (18);

[0031] The cryogenic liquid nitrogen storage tank (1) is connected to the raw material tank (3) via a nitrogen line (11); the raw material tank (3) is connected to the liquid inlet line (8) of the mixing and stirring reactor (2) via a raw material tank inlet material line (16); the spray gun device (7) is connected to the liquid inlet line (8) of the mixing and stirring reactor (2) via a secondary combustion chamber material line (17); and the two ends of the nitrogen backflush line (18) are connected to the secondary combustion chamber material line (17) and the nitrogen line (11) respectively.

[0032] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0033] 1. The aluminum residue incineration treatment process and system after the production of triisobutylaluminum of the present invention, through the design of nitrogen line, nitrogen purging line and nitrogen backflushing line, uses nitrogen as protective gas to ensure that the aluminum residue does not come into contact with air before entering the incinerator and secondary combustion chamber, which greatly improves the safety of the treatment process.

[0034] 2. The aluminum residue incineration treatment process and system of the present invention, after the production of triisobutylaluminum, through precise control of valves at various points in the system, regulates the flow of nitrogen and materials, controls the feed rate of the incinerator and secondary combustion chamber, ensures the continuity and safe control of aluminum residue material treatment, and improves the treatment efficiency; the incineration treatment system and process of the present invention can achieve a treatment efficiency of 50 kg / h, which is more than 10 times higher than the efficiency of existing hydrolysis methods or cement kiln treatment of aluminum residue.

[0035] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages may become apparent from the description or be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained from what is particularly pointed out in the description and drawings. Attached Figure Description

[0036] The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0037] Figure 1 This is a diagram showing the composition of the aluminum residue incineration treatment system of the present invention.

[0038] Figure label:

[0039] 1- Cryogenic liquid nitrogen storage tank; 2- Mixing and stirring reactor; 3- Raw material tank; 4- Air supply device; 5- Secondary combustion chamber; 6- Incinerator; 7- Spray gun device; 8- Liquid full connection line; 9- Material full connection line; 10- Vaporizer; 11- Nitrogen line; 12- Nitrogen main line; 13- First nitrogen branch line; 14- Second nitrogen branch line; 15- Third nitrogen branch line; 16- Raw material tank feed line; 17- Secondary combustion chamber feed line; 18- Nitrogen backflush line; 19- Nitrogen purging line; 20- Vent line; 21- Spray gun blockage observation. Clogged maintenance port for nozzles and spray guns; 22-Nitrogen purging vent line; LG-Glass plate level gauge; PG-Cryogenic liquid nitrogen storage tank pressure gauge; PG1-Reactor pressure gauge; PG2-Nitrogen line pressure gauge; PG3-Second combustion chamber material line pressure gauge; PG4-Raw material tank pressure gauge; M-Motor; 1#-Vaporizer inlet valve; 2#-Vaporizer outlet pressure regulating valve; 3#-Nitrogen line main valve; 4#-Reactor nitrogen inlet solenoid valve; 5#-Reactor nitrogen tank root valve; 6#-First nitrogen purging material line ball valve; 7#-Second nitrogen purging material line Ball valves; 8# - Nitrogen purging vent line ball valve; 9# - First nitrogen purging feed line ball valve; 10# - Second nitrogen purging feed line ball valve; 11# - Nitrogen line ball valve; 12# - Nitrogen hose connection line ball valve; 13# - Material hose connection line ball valve; 14# - Reactor material inlet solenoid valve; 15# - Material line ball valve; 16# - Reactor feed line ball valve; 17# - Reactor discharge line ball valve; 18# - Material to secondary combustion chamber solenoid valve; 19# - Secondary combustion chamber material line main valve; 20# - First and secondary combustion chamber spray gun feed ball valve; 21# - Second combustion chamber spray gun feed ball valve; 22# - Second combustion chamber material inlet solenoid valve; 23# - Second combustion chamber nitrogen backflush line ball valve; 24# - Nitrogen backflush line ball valve; 25# - Reactor venting cross-line ball valve; 26# - Reactor safety valve front valve; 27# - Raw material tank root material valve; 28# - Raw material tank root nitrogen valve; 29# - Pressure regulating valve; 30# - Control valve; 31# - First check valve; 32# - Second check valve; 33# - First nitrogen jet; 34# - Second nitrogen jet; 35# - Safety valve. Detailed Implementation

[0040] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0041] This invention provides a process for incinerating aluminum residue after the production of triisobutylaluminum, comprising the following steps:

[0042] S1: Based on the maximum volume of the raw material tank, store the on-site materials in the raw material tank in a fixed quantity;

[0043] S2: Perform an airtightness test on the raw material tank. After the airtightness is qualified, introduce nitrogen into the raw material tank through the nitrogen line to purge and agitate the material in the raw material tank, so that the solid and liquid are fully mixed.

[0044] S3: Using the nitrogen pressure in the raw material tank, all the material in the raw material tank is forced into the mixing and stirring reactor through the raw material tank feed line, and the material in the mixing and stirring reactor is fully stirred by the motor;

[0045] S4: Ignite the fuel in the incinerator to keep the fuel burning continuously;

[0046] S5: After the material in the mixing and stirring reactor is stirred, nitrogen gas is introduced into the mixing and stirring reactor for pressurization. After pressurization to the specified pressure range, the pressure in the mixing and stirring reactor is maintained within the specified range. Using the nitrogen pressure in the mixing and stirring reactor, the material in the mixing and stirring reactor is continuously forced into the spray gun device through the material line in the secondary combustion chamber. The spray gun device sprays the material into the secondary combustion chamber, and the air supply device is turned on at the same time. The material is fully combusted in the secondary combustion chamber and the incinerator.

[0047] S6: Determine whether all the material in the mixing and stirring reactor has been pressed into the spray gun and sprayed completely based on whether the liquid level of the material in the mixing and stirring reactor is below the liquid level line.

[0048] S7: After all the material in the mixing and stirring reactor has been pressed into the spray gun and sprayed into the secondary combustion chamber and incinerator for complete combustion, nitrogen is used to purge the remaining material in the spray gun into the secondary combustion chamber for combustion.

[0049] S8: Depressurize the mixing and stirring reactor to 0MPa, use nitrogen to backflush the residual material in the secondary combustion chamber material line into the mixing and stirring reactor, and shut down the system after purging.

[0050] Specifically, in step S1, the on-site materials are quantitatively stored in the raw material tank according to the maximum volume of the raw material tank; the quantitative storage amount of on-site materials shall not exceed 80% of the maximum volume of the raw material tank.

[0051] Specifically, in step S2, a vaporizer inlet valve (1#) and a vaporizer outlet regulating valve (2#) are installed on the nitrogen line. The vaporizer outlet regulating valve (2#) is opened at 20-50% during the aluminum residue incineration process (exemplarily, the opening of the vaporizer outlet regulating valve is 22%, 24%, 25%, 26%, 28%, 30%, 32%, 34%, 35%, 36%, 38%, 40%, 42%, 44%, 45%, 46%, 48%), and the vaporizer inlet valve (1#) is opened at 100% during the aluminum residue incineration process. The airtightness test of the raw material tank refers to: nitrogen is introduced into the nitrogen line, and when the pressure gauge (PG2) on the nitrogen line shows that the nitrogen line (11) has been pressurized to above 0.4 MPa, it is tested with soapy water. If no external bubbles are found, the airtightness is qualified. The nitrogen pressure is 0.4-0.6 MPa.

[0052] Specifically, in step S3, the nitrogen pressure inside the raw material tank is used to press all the material in the raw material tank into the mixing and stirring reactor through the material inlet line of the raw material tank. The material in the mixing and stirring reactor is thoroughly stirred by a motor with a frequency conversion of 37-66% (exemplarily, the motor frequency conversion is 40%, 42%, 44%, 46%, 48%, 50%, 52%, 54%, 56%, 58%, 60%, 62%, 64%). The stirring time is 1-2 hours.

[0053] Specifically, in step S5, after the material in the mixing reactor is stirred, nitrogen gas is introduced into the mixing reactor to pressurize it to 0.2MPa-0.4MPa. The pressure inside the mixing reactor is maintained within the 0.2MPa-0.4MPa range. The nitrogen pressure inside the mixing reactor is used to continuously force the material into the spray gun device. It should be noted that the secondary combustion chamber material line is equipped with a solenoid valve for material to the secondary combustion chamber (18#) and a solenoid valve for material to the secondary combustion chamber (22#). The solenoid valves for material to the secondary combustion chamber (18#) and the material to the secondary combustion chamber (22#) are located at... During the aluminum residue incineration process, the opening degree is 20-80%; simultaneously, in step S5, the opening degree of the reactor nitrogen inlet solenoid valve (4#) on the nitrogen line is also 20-80%; for example, the opening degrees of the reactor nitrogen inlet solenoid valve 4#, the secondary combustion chamber material solenoid valve 18#, and the secondary combustion chamber material inlet solenoid valve 22# are 22%, 24%, 26%, 28%, 30%, 32%, 34%, 36%, 38%, 40%, 42%, 44%, 46%, 48%, 50%, 52%, 54%, 56%, 60%, 62%, 64%, 66%, 68%, 70%, 72%, 74%, 76%, and 78%.

[0054] While the spray gun device is spraying material into the secondary combustion chamber, the air supply device is turned on, and the air supply device provides air to the spray gun device. The volume ratio of the provided air to the material in the air supply device is ≤1:3. It should be noted that, in order to ensure that the volume ratio of the provided air to the material in the air supply device is ≤1:3 during the process of the air supply device providing air to the spray gun device, the control valve (30#), the pressure regulating valve (29#), and the first one-way valve (31#) installed on the air supply device (4) need to cooperate with each other for precise adjustment. The opening degree of the control valve (30#) and the regulating valve (29#) is 20-80%, and the first one-way valve (31#) is fully open. For example, the opening degrees of the control valve (30#) and the regulating valve (29#) are 22%, 24%, 26%, 28%, 30%, 32%, 34%, 36%, 38%, 40%, 42%, 44%, 46%, 48%, 50%, 52%, 54%, 56%, 60%, 62%, 64%, 66%, 68%, 70%, 72%, 74%, 76%, and 78%.

[0055] Specifically, in step S6, it is determined whether all the material in the mixing and stirring reactor has been pressed into the spray gun and sprayed completely, based on whether the liquid level of the material in the mixing and stirring reactor is below the liquid level line. If the liquid level of the material in the mixing and stirring reactor is below the liquid level line, airflow sound will be generated in the material line of the secondary combustion chamber at the same time, which can be used to determine whether all the material in the mixing and stirring reactor has been pressed into the spray gun and sprayed completely.

[0056] Specifically, in step S7, after all the material in the mixing and stirring reactor has been pressed into the spray gun and injected into the secondary combustion chamber and incinerator for complete combustion, nitrogen is used to purge the remaining material in the spray gun into the secondary combustion chamber for combustion, ensuring that there is no material residue in the spray gun; then in step S8, the mixing and stirring reactor is depressurized to 0MPa, and nitrogen is used to backflush the remaining material in the secondary combustion chamber material line into the mixing and stirring reactor, ensuring that there is no remaining material in the secondary combustion chamber material line, and the system is shut down after purging is completed.

[0057] It should be noted that the diameters of the raw material tank inlet material line and the secondary combustion chamber material line are equal and both ≥ DN50; the diameter of the nitrogen line is ≥ DN20 and is simultaneously smaller than the diameters of the raw material tank inlet material line and the secondary combustion chamber material line.

[0058] Mixing and stirring reactor volume ≥4m³ 3 Pressure resistance ≥ 0.8 MPa;

[0059] The refractoriness of the refractory materials in the secondary combustion chamber and incinerator is ≥2000℃;

[0060] The spray gun is made of high-purity steel with a fire resistance of ≥2000℃;

[0061] The raw material tank has a volume of ≥2m3 and a pressure of ≥0.6Mpa.

[0062] The present invention also provides an aluminum residue incineration treatment system after the production of triisobutylaluminum, for implementing the above-mentioned aluminum residue incineration treatment process, including a feeding unit, a processing unit, and a combustion unit;

[0063] The feeding unit includes a cryogenic liquid nitrogen storage tank (1), a raw material tank (3), a vaporizer (10), a nitrogen line (11), and a raw material tank feed line (16);

[0064] The processing unit includes a mixing and stirring reactor (2), which is equipped with a motor (M) and a liquid power supply (8). The mixing and stirring reactor (2) is connected to a vent line (20), which includes a vent line main line and vent line branch lines.

[0065] The combustion unit includes an incinerator (6), a secondary combustion chamber (5), a spray gun device (7), an air supply device (4), a secondary combustion chamber material line (17), and a nitrogen backflushing line (18);

[0066] Specifically, the cryogenic liquid nitrogen storage tank (1) is connected to the raw material tank (3) via a nitrogen line (11); the raw material tank (3) is connected to the liquid inlet line (8) of the mixing and stirring reactor (2) via a raw material tank inlet material line (16); the spray gun device (7) is connected to the liquid inlet line (8) of the mixing and stirring reactor (2) via a secondary combustion chamber material line (17); and the two ends of the nitrogen backflush line (18) are connected to the secondary combustion chamber material line (17) and the nitrogen line (11) respectively.

[0067] The nitrogen line (11) includes a nitrogen main line (12) and multiple branch lines connected in parallel to the nitrogen main line (12). The mixing and stirring reactor (2), the raw material tank (3), and the raw material tank inlet material line (16) are respectively connected to the nitrogen main line (12) through the branch lines set in parallel.

[0068] The branch lines include a first nitrogen branch line (13), a second nitrogen branch line (14), and a third nitrogen branch line (15); one end of the first nitrogen branch line (13) is connected to the main nitrogen line (12), and the other end is connected to the mixing and stirring reactor (2); one end of the second nitrogen branch line (14) is connected to the main nitrogen line (12), and the other end is connected to the material inlet line (16) of the raw material tank; one end of the third nitrogen branch line (15) is connected to the main nitrogen line (12), and the other end is connected to the raw material tank (3).

[0069] The aluminum residue incineration treatment system also includes a purging and venting unit, which includes a nitrogen purging material line (19) and a nitrogen purging and venting line (22); the nitrogen purging material line (19) is connected to the nitrogen main line (12) and the secondary combustion chamber material line (17) at both ends respectively; the nitrogen purging and venting line (22) is connected to the nitrogen main line (12) and the venting line (20) at both ends respectively.

[0070] Valves are installed on the nitrogen line (11), the raw material tank feed line (16), the vent line (20), the secondary combustion chamber feed line (17), the nitrogen backflush line (18), the nitrogen purging feed line (19), and the nitrogen purging vent line (22) to regulate the flow of nitrogen and materials.

[0071] Specifically, in the feeding unit, a cryogenic liquid nitrogen storage tank pressure gauge (PG) and a glass plate level gauge (LG) are installed on one side of the cryogenic liquid nitrogen storage tank (1), and the two ends of the nitrogen main line (12) are connected to the cryogenic liquid nitrogen storage tank (1) 1 and the third nitrogen branch line (15) respectively.

[0072] Along the direction away from the cryogenic liquid nitrogen storage tank (1), the main nitrogen line (12) is sequentially equipped with a vaporizer inlet valve (1#), a vaporizer (10), a vaporizer outlet regulating valve (2#), a nitrogen line main valve (3#), and a nitrogen line pressure gauge (PG2); one end of the first nitrogen branch line (13) is connected to the main nitrogen line (12), and the other end is connected to the mixing and stirring reactor (2). Along the direction close to the mixing and stirring reactor (2), a reactor inlet nitrogen solenoid valve (4#) and a reactor nitrogen tank root valve (5#) are sequentially installed on it; one end of the second nitrogen branch line (14) is connected to the main nitrogen line (13), and the other end is connected to the raw material tank inlet material line (16). Along the direction close to the material line (16) of the raw material tank, the first nitrogen purging feed line ball valve (9#) and the second nitrogen purging feed line ball valve (10#) are installed in sequence on the second nitrogen branch line (14); one end of the third nitrogen branch line (15) is connected to the nitrogen main line (12), and the other end is connected to the raw material tank (3). Along the direction close to the raw material tank (3), the third nitrogen branch line (15) is installed in sequence with a nitrogen line ball valve (11#), a nitrogen hose connection line ball valve (12#) and a raw material tank root nitrogen valve (28#). A raw material tank pressure gauge (PG4) is installed between the nitrogen hose connection line ball valve (12#) and the raw material tank root nitrogen valve (28#).

[0073] One end of the raw material tank feed line (16) is connected to the mixing and stirring reactor (2), and the other end is connected to the raw material tank (3). Along the direction away from the raw material tank (3), the raw material tank feed line (16) is sequentially equipped with a raw material tank root material valve (27#), a material hose connection line ball valve (13#), a reactor material inlet solenoid valve (14#), a raw material tank feed line ball valve (15#), and a reactor feed line ball valve (16#).

[0074] Specifically, in the processing unit, a pressure gauge (PG1) is installed on the mixing and stirring reactor (2), and a motor (M) and a liquid power supply (8) are installed inside the mixing and stirring reactor (2); one end of the vent line is connected to the mixing and stirring reactor (2), and the other end is directly connected to the ground. Along the direction away from the mixing and stirring reactor (2), a safety valve (26#) and a safety valve (35#) are installed in sequence; the two ends of the vent line branch are connected to the vent line main line respectively, and a reactor venting cross-line ball valve (25#) is installed on it.

[0075] Specifically, in the combustion unit, the incinerator (6) and the secondary combustion chamber (5) are connected. One side of the secondary combustion chamber (5) is connected to the spray gun device (7). One end of the air supply device (4) is connected to the spray gun device (7). The air supply device (4) and the spray gun device (7) are connected through an air supply pipeline. Along the direction close to the spray gun device (4), a pressure regulating valve (29#), a control valve (30#), and a first one-way valve (31#) are sequentially installed on the air supply pipeline. One end of the spray gun device (4) is connected to the secondary combustion chamber (5), and the other end is provided with a spray gun blockage observation port and a spray gun blockage maintenance port (21).

[0076] One end of the secondary combustion chamber material line (17) is connected to the liquid connection line (8) in the mixing and stirring reactor (2), and the other end is connected to the spray gun device (7). Along the direction away from the material line (16) of the raw material tank, the secondary combustion chamber material line (17) is sequentially equipped with a reactor discharge line ball valve (17#), a secondary combustion chamber material solenoid valve (18#), a secondary combustion chamber material line main valve (19#), a first secondary combustion chamber spray gun inlet ball valve (20#), a second secondary combustion chamber spray gun inlet ball valve (21#), a secondary combustion chamber material inlet solenoid valve (22#), and a second check valve (32#). Between the secondary combustion chamber material solenoid valve (18#) and the secondary combustion chamber material line main valve (19#), a secondary combustion chamber material line pressure gauge (PG3) is installed at the end closest to the secondary combustion chamber material line main valve (19#).

[0077] The nitrogen backflush line (18) is connected in parallel with the nitrogen main line (12) and the secondary combustion chamber material line (17). One end of the nitrogen backflush line (18) is connected to the nitrogen main line (12) and is located at the vaporizer outlet pressure regulating valve (2#) and the nitrogen line main valve (3#), near the end of the nitrogen line main valve (3#). The other end of the nitrogen backflush line (18) is located between the first secondary combustion chamber spray gun inlet ball valve (20#) and the second secondary combustion chamber spray gun inlet ball valve (21#). Along the direction away from the nitrogen main line (12), the nitrogen backflush line ball valve (24#) and the secondary combustion chamber nitrogen backflush line ball valve (23#) are sequentially installed on the nitrogen backflush line (18).

[0078] In the purging and venting unit, the two ends of the nitrogen purging material line (19) are connected to the nitrogen main line (12) and the secondary combustion chamber material line (17) respectively. One end of the nitrogen purging material line (19) is located between the nitrogen main line main valve (3#) on the nitrogen main line and the reactor inlet nitrogen solenoid valve (4#) on the first nitrogen branch line. The other end of the nitrogen purging material line (19) is located between the reactor outlet ball valve (17#) and the secondary combustion chamber material solenoid valve (18#). The nitrogen purging material line (19) is equipped with a first nitrogen purging material line ball valve (6#) and a second nitrogen purging material line ball valve (7#).

[0079] The aluminum residue incineration treatment system also includes two nitrogen slingers. The first nitrogen slinger (33#) is located on the secondary combustion chamber material line (17), between the secondary combustion chamber material solenoid valve (18#) and the secondary combustion chamber material line pressure gauge (PG3).

[0080] The second nitrogen blower (34#) is located on the nitrogen backflush line (18), between the nitrogen backflush line ball valve (24#) and the secondary combustion chamber nitrogen backflush line ball valve (23#), near the end of the secondary combustion chamber nitrogen backflush line ball valve (23#).

[0081] The nitrogen main line (12) and the vent line main line are connected by a nitrogen purging vent line (22), and a nitrogen purging vent line ball valve (8#) is installed on the nitrogen purging vent line (22).

[0082] It should be noted that the diameters of the raw material tank inlet material line (16) and its valves, the secondary combustion chamber material line (17) and its valves, and the vent line (20) and its valves are all equal and ≥DN50; the diameters of the nitrogen line (11) and its valves, the nitrogen backflush line (18) and its valves, the nitrogen purging material line (19) and its valves, and the nitrogen purging vent line (22) and its valves are all equal and ≥DN20, and are smaller than the diameters of the raw material tank inlet material line (16) and the secondary combustion chamber material line (17).

[0083] It should be noted that in the process of realizing the aluminum residue incineration treatment process through the above-mentioned aluminum residue incineration treatment system, the components of the feeding unit, processing unit, combustion unit, and purging and venting unit work together to complete the incineration treatment of aluminum residue.

[0084] Specifically, in step S1, the on-site materials are quantitatively stored in the raw material tank according to its maximum volume; the quantitative storage amount of on-site materials shall not exceed 80% of the maximum volume of the raw material tank. In actual operation, after the on-site materials are quantitatively stored in the raw material tank, the raw material tank is connected to the nitrogen line and the raw material tank inlet material line, and the raw material tank is connected to the incineration treatment system.

[0085] Specifically, in step S2, the airtightness test of the raw material tank refers to the airtightness test of the two flange connections at the base of the raw material tank. The airtightness test involves introducing nitrogen into the nitrogen line. When the nitrogen line pressure gauge (PG2) shows that the nitrogen line (11) has been pressurized to above 0.4 MPa, the test is performed with soapy water. If no external bubbles are found, the airtightness is qualified. After the airtightness is qualified, the material valve (27#) and the nitrogen valve (28#) at the base of the raw material tank are opened, and nitrogen is introduced into the raw material tank (3) through the nitrogen line (11) to purge and agitate the material in the raw material tank (3) so that the solid and liquid are fully mixed.

[0086] In actual operation, first open the vaporizer inlet valve (1#) and the vaporizer outlet regulating valve (2#), and adjust the opening of the vaporizer inlet valve (1#) and the vaporizer outlet regulating valve (2#). The vaporizer inlet valve (1#) is fully open, and the opening of the vaporizer outlet regulating valve (2#) is controlled at 20-50% (for example, the opening of the vaporizer outlet regulating valve is 22%, 24%, 25%, 26%, 28%, 30%, 32%, 34%, 35%, 36%, 38%, 40%, 42%, 44%, 45%, 46%, 48%), so as to maintain the vaporizer (10) outlet pressure at 0.4-0.6MPa and provide high-purity pressure for the entire incineration system. Then open the main nitrogen line valve (3#, fully open). Observe the nitrogen line pressure gauge (PG2). After the pressure is in the range of 0.4-0.6MPa, open the nitrogen line ball valve (11#), nitrogen hose connection ball valve (12#), first nitrogen purge feed line ball valve (9#), second nitrogen purge feed line ball valve (10#), material hose connection ball valve (13#), reactor material inlet solenoid valve (14#), and raw material tank inlet material line ball valve (15#) (all valves should be fully open). Connect the two flanges at the base of the raw material tank. After the airtightness test is performed at the joint, the material valve (27#) and nitrogen valve (28#) at the bottom of the raw material tank are opened. Nitrogen gas is introduced into the raw material tank (3) through the nitrogen line (11). The material in the raw material tank (3) is purged and stirred by the material plug (9) to make the solid and liquid fully mixed. After the raw material tank (3) is pressurized to 0.4-0.6MPa, the ball valve (9#) of the first nitrogen purging feed line and the ball valve (10#) of the second nitrogen purging feed line are closed to prepare for pressing the material into the mixing and stirring reactor (2).

[0087] Specifically, in step S3, using the nitrogen pressure inside the raw material tank (3), the material inside the raw material tank (3) is pressed into the mixing and stirring reactor (2) through the material inlet line (16) of the raw material tank. When there is a sound of gas passing through the material inlet line (16) of the raw material tank, it can be confirmed that the material inside the raw material tank (3) has been pressed into the mixing and stirring reactor (2). The material inside the mixing and stirring reactor (2) is fully stirred by the motor (M).

[0088] In actual operation, open the venting ball valve (25#) and the feed ball valve (16#) of the reactor. Use the pressure inside the raw material tank (3) to press the material in the raw material tank (3) into the mixing and stirring reactor (2). If the nitrogen pressure is too low to pressurize, open the nitrogen valve (28#) at the bottom of the raw material tank and pressurize the raw material tank (3) to 0.4-0.6MPa. Continue to pressurize the material into the mixing and stirring reactor (2) until the material in the raw material tank (3) is completely pressurized. If there is a sound of gas passing through the feed line (16) of the raw material tank, it means that the material in the raw material tank (3) has been fully inserted into the feed line (9) and passed through. After all the material in the raw material tank (3) has been compressed, continue to use the residual pressure or pressurization in the raw material tank (3) to purge the raw material tank feed line (16) into the mixing and stirring reactor (2), ensuring that there is no residual material in the raw material tank feed line (16). After the raw material tank feed line (16) is purged, close the raw material tank root material valve (27#), the material hose connection line ball valve (13#), the reactor material inlet solenoid valve (14#), the raw material tank feed line ball valve (15#), the reactor feed line ball valve (16#), and the reactor venting cross-line ball valve (25#). The motor frequency is 37%-66% (exemplarily, the motor frequency is 40%, 42%, 44%, 46%, 48%, 50%, 52%, 54%, 56%, 58%, 60%, 62%, 64%), and the stirring time is 1-2 hours.

[0089] It should be noted that during the process of using the pressure inside the raw material tank (3) to press the material inside the raw material tank (3) into the mixing and stirring reactor (2), the opening of the nitrogen line main valve (3#), nitrogen line ball valve (11#), nitrogen hose connection ball valve (12#), raw material tank root nitrogen valve (28#), raw material tank root material valve (27#), material hose connection ball valve (13#), reactor material inlet solenoid valve (14#), raw material tank inlet reactor material line ball valve (15#), reactor feed line ball valve (16#), and reactor venting cross-line ball valve (25#) is fully open until all the material inside the raw material tank (3) is pressed into the mixing and stirring reactor (2); if the pressure inside the raw material tank (3) exceeds 0.6MPa during the material pressing process, the nitrogen hose connection ball valve (12#) is closed. During the process of using the pressure inside the raw material tank (3) to force the material inside the raw material tank (3) into the mixing and stirring reactor (2), the pressure inside the raw material tank (3) is always maintained at 0.4-0.6 MPa, which ensures that all the material inside the raw material tank (3) is forced into the mixing and stirring reactor (2). After the material enters the mixing and stirring reactor (2), the gas inside the mixing and stirring reactor (2) is slowly discharged through the vent line.

[0090] Specifically, in step S5, after stirring is completed, nitrogen is introduced into the mixing and stirring reactor through the nitrogen line to pressurize it. After pressurizing to the specified pressure range, the pressure inside the mixing and stirring reactor is maintained within the specified range. Using the nitrogen pressure inside the mixing and stirring reactor, the material inside the mixing and stirring reactor is continuously pressed into the spray gun device through the secondary combustion chamber material line. The spray gun device sprays the material into the secondary combustion chamber, and the material is fully combusted in the secondary combustion chamber and the incinerator.

[0091] In actual operation, after the stirring is completed, the nitrogen inlet solenoid valve (4#) and the nitrogen tank root valve (5#) of the reactor are opened to pressurize the mixing reactor (2) with nitrogen. After pressurizing to the specified pressure range of 0.2MPa-0.4MPa, the reactor discharge line ball valve (17#), the secondary combustion chamber material solenoid valve (18#), the secondary combustion chamber material line main valve (19#), the first secondary combustion chamber spray gun inlet ball valve (20#), the second secondary combustion chamber spray gun inlet ball valve (21#), the secondary combustion chamber material inlet solenoid valve (22#), and the second check valve (32#) are opened on the secondary combustion chamber material line (17). The material is pressurized to the spray gun device (7) through the secondary combustion chamber material line (17), and the spray gun device (7) sprays the material into the secondary combustion chamber (5). The material is fully burned in the secondary combustion chamber (5) and the incinerator (6).

[0092] It should be noted that during the process of pressing the material from the mixing and stirring reactor (2) into the spray gun device (7), the opening degree of the reactor nitrogen inlet solenoid valve (4#), the secondary combustion chamber material solenoid valve (18#), and the secondary combustion chamber material inlet solenoid valve (22#) is 20-80% (exemplarily, the opening degree of the reactor nitrogen inlet solenoid valve 4#, the secondary combustion chamber material solenoid valve 18#, and the secondary combustion chamber material inlet solenoid valve 22# is 22%, 24%, 26%, 28%, 30%, 32%, 34%, 36%, 38%, 40%, 42%, 44%, 46%, 48%, 50%, 52%, 54%, 56%, 60%, 62%, 64%, 66%, 68%, 70%, 72%, 74%, 76%, 78%), and the remaining valves are fully open.

[0093] It should be noted that the air supply device (4) is opened simultaneously when the spray gun device (7) sprays material into the secondary combustion chamber (5). Through the precise adjustment of the control valve (30#), pressure regulating valve (29#) and the first one-way valve (31#) of the air supply device (4), the opening degree of the control valve (30#) and the regulating valve (29#) is 20-80%, and the first one-way valve (31#) is fully open, it is ensured that the volume ratio of the air supplied by the air supply device (4) to the material in the spray gun device (7) is ≤1:3. For example, the opening degrees of the control valve (30#) and the regulating valve (29#) are 22%, 24%, 26%, 28%, 30%, 32%, 34%, 36%, 38%, 40%, 42%, 44%, 46%, 48%, 50%, 52%, 54%, 56%, 60%, 62%, 64%, 66%, 68%, 70%, 72%, 74%, 76%, and 78%.

[0094] Specifically, in step S6, it is determined whether the material in the mixing and stirring reactor (2) has been completely pressed into the spray gun and sprayed, based on whether the liquid level of the material in the mixing and stirring reactor (2) is below the liquid full insertion line (8) or whether there is airflow sound in the material line (17) of the secondary combustion chamber.

[0095] It should be noted that when the liquid level of the material in the mixing and stirring reactor (2) is below the liquid full insertion line (8), the airflow sound will be generated immediately in the material line (17) of the secondary combustion chamber. These two phenomena occur simultaneously and can be used to determine whether the material in the mixing and stirring reactor (2) has been completely pressed into the spray gun device (7) and sprayed.

[0096] Specifically, in step S7, after all the material in the mixing and stirring reactor (2) has been pressed into the spray gun device (7) and sprayed into the secondary combustion chamber (5) and the incinerator (6) for complete combustion, the secondary combustion chamber material line (17) is closed, and the nitrogen backflush line (18), nitrogen purging line (19) and nitrogen purging vent line (22) are opened. The remaining material in the spray gun device (7) is purged into the secondary combustion chamber (5) for combustion using nitrogen. Then the nitrogen backflush line (18), nitrogen purging line (19) and nitrogen purging vent line (22) are closed.

[0097] In actual operation, after all the material in the mixing reactor (2) has been pressed into the spray gun device (7) and sprayed into the secondary combustion chamber (5) and incinerator (6) for complete combustion, the first secondary combustion chamber spray gun feed ball valve (20#) on the secondary combustion chamber material line (17) is closed. At this time, the reactor discharge line ball valve (17#), the secondary combustion chamber material solenoid valve (18#), and the secondary combustion chamber material line main valve (19#) are still fully open. Then, the nitrogen backflush line ball valve (24#) is opened and fully opened. ), the nitrogen backflush line ball valve of the second combustion chamber (23#, fully open), the first nitrogen purging material line ball valve (6#, fully open), the second nitrogen purging material line ball valve (7#, fully open), and the nitrogen purging vent line ball valve (8#, fully open); use nitrogen to blow the material in the spray gun metal hose into the second combustion chamber (5) and the incinerator (6) for combustion until no more material is sprayed out of the spray gun, and then close the second secondary combustion chamber spray gun feed ball valve (21#) and the secondary combustion chamber material inlet solenoid valve (22#).

[0098] Specifically, in step S8, the mixing and stirring reactor (2) is depressurized to 0 MPa, and nitrogen is used to backflush the residual material in the secondary combustion chamber material line (17) into the mixing and stirring reactor (2). After the purging is completed, the system is shut down.

[0099] In actual operation, open the venting cross-line ball valve (25#, fully open) of the reactor to depressurize the mixing and stirring reactor (2) to 0MPa, and then open the feed ball valve (20#, fully open) of the first secondary combustion chamber spray gun. Use nitrogen to backflush the residual material in the secondary combustion chamber material line (17) into the mixing and stirring reactor (2) to avoid material residue in the secondary combustion chamber material line (17). After purging, close the reactor discharge line ball valve (17#), the secondary combustion chamber material solenoid valve (18#), the secondary combustion chamber material line main valve (19#), and the first secondary combustion chamber spray gun feed ball valve (20#) set on the secondary combustion chamber material line (17). Close the secondary combustion chamber nitrogen backflush line ball valve (23#) and the nitrogen backflush line ball valve (24#) set on the nitrogen backflush line (18).

[0100] The aluminum residue incineration treatment system and process method of this invention, produced after the production of triisobutylaluminum, ensures that the aluminum residue does not come into contact with air before entering the incinerator and secondary combustion chamber through the design of nitrogen lines, nitrogen purging lines, and nitrogen backflushing lines, greatly improving the safety of the treatment process. Simultaneously, precise control and adjustment of valves throughout the system controls the feed rate to the incinerator and secondary combustion chamber, ensuring the continuity and safe controllability of aluminum residue material processing and improving processing efficiency. The incineration treatment system and process method of this invention can achieve a processing efficiency of 50 kg / h, which is more than 10 times more efficient than existing hydrolysis methods or cement kiln treatments of aluminum residue.

[0101] Example 1

[0102] This embodiment provides a system for incinerating aluminum residue after the production of triisobutylaluminum, such as... Figure 1 As shown, it includes a feeding unit, a processing unit, and a combustion unit;

[0103] The feeding unit includes a cryogenic liquid nitrogen storage tank (1), a raw material tank (3), a vaporizer (10), a nitrogen line (11), and a raw material tank feed line (16);

[0104] The processing unit includes a mixing and stirring reactor (2), which is equipped with a motor (M) and a liquid power supply (8). The mixing and stirring reactor (2) is connected to a vent line (20), which includes a vent line main line and vent line branch lines.

[0105] The combustion unit includes an incinerator (6), a secondary combustion chamber (5), a spray gun device (7), an air supply device (4), a secondary combustion chamber material line (17), and a nitrogen backflushing line (18);

[0106] Specifically, the cryogenic liquid nitrogen storage tank (1) is connected to the raw material tank (3) via a nitrogen line (11); the raw material tank (3) is connected to the liquid inlet line (8) of the mixing and stirring reactor (2) via a raw material tank inlet material line (16); the spray gun device (7) is connected to the liquid inlet line (8) of the mixing and stirring reactor (2) via a secondary combustion chamber material line (17); and the two ends of the nitrogen backflush line (18) are connected to the secondary combustion chamber material line (17) and the nitrogen line (11) respectively.

[0107] The nitrogen line (11) includes a nitrogen main line (12) and multiple branch lines connected in parallel to the nitrogen main line (12). The mixing and stirring reactor (2), the raw material tank (3), and the raw material tank inlet material line (16) are respectively connected to the nitrogen main line (12) through the branch lines set in parallel.

[0108] The branch lines include a first nitrogen branch line (13), a second nitrogen branch line (14), and a third nitrogen branch line (15); one end of the first nitrogen branch line (13) is connected to the main nitrogen line (12), and the other end is connected to the mixing and stirring reactor (2); one end of the second nitrogen branch line (14) is connected to the main nitrogen line (12), and the other end is connected to the material inlet line (16) of the raw material tank; one end of the third nitrogen branch line (15) is connected to the main nitrogen line (12), and the other end is connected to the raw material tank (3).

[0109] The aluminum residue incineration treatment system also includes a purging and venting unit, which includes a nitrogen purging material line (19) and a nitrogen purging and venting line (22); the nitrogen purging material line (19) is connected to the nitrogen main line (12) and the secondary combustion chamber material line (17) at both ends respectively; the nitrogen purging and venting line (22) is connected to the nitrogen main line (12) and the venting line (20) at both ends respectively.

[0110] Valves are installed on the nitrogen line (11), the raw material tank feed line (16), the vent line (20), the secondary combustion chamber feed line (17), the nitrogen backflush line (18), the nitrogen purging feed line (19), and the nitrogen purging vent line (22) to regulate the flow of nitrogen and materials.

[0111] Specifically, in the feeding unit, a cryogenic liquid nitrogen storage tank pressure gauge (PG) and a glass plate level gauge (LG) are installed on one side of the cryogenic liquid nitrogen storage tank (1), and the two ends of the nitrogen main line (12) are connected to the cryogenic liquid nitrogen storage tank (1) 1 and the third nitrogen branch line (15) respectively.

[0112] Along the direction away from the cryogenic liquid nitrogen storage tank (1), the main nitrogen line (12) is sequentially equipped with a vaporizer inlet valve (1#), a vaporizer (10), a vaporizer outlet regulating valve (2#), a nitrogen line main valve (3#), and a nitrogen line pressure gauge (PG2); one end of the first nitrogen branch line (13) is connected to the main nitrogen line (12), and the other end is connected to the mixing and stirring reactor (2). Along the direction close to the mixing and stirring reactor (2), a reactor inlet nitrogen solenoid valve (4#) and a reactor nitrogen tank root valve (5#) are sequentially installed on it; one end of the second nitrogen branch line (14) is connected to the main nitrogen line (13), and the other end is connected to the raw material tank inlet material line (16). Along the direction close to the material line (16) of the raw material tank, the first nitrogen purging feed line ball valve (9#) and the second nitrogen purging feed line ball valve (10#) are installed in sequence on the second nitrogen branch line (14); one end of the third nitrogen branch line (15) is connected to the nitrogen main line (12), and the other end is connected to the raw material tank (3). Along the direction close to the raw material tank (3), the third nitrogen branch line (15) is installed in sequence with a nitrogen line ball valve (11#), a nitrogen hose connection line ball valve (12#) and a raw material tank root nitrogen valve (28#). A raw material tank pressure gauge (PG4) is installed between the nitrogen hose connection line ball valve (12#) and the raw material tank root nitrogen valve (28#).

[0113] One end of the raw material tank feed line (16) is connected to the mixing and stirring reactor (2), and the other end is connected to the raw material tank (3). Along the direction away from the raw material tank (3), the raw material tank feed line (16) is sequentially equipped with a raw material tank root material valve (27#), a material hose connection line ball valve (13#), a reactor material inlet solenoid valve (14#), a raw material tank feed line ball valve (15#), and a reactor feed line ball valve (16#).

[0114] Specifically, in the processing unit, a pressure gauge (PG1) is installed on the mixing and stirring reactor (2), and a motor (M) and a liquid power supply (8) are installed inside the mixing and stirring reactor (2); one end of the vent line is connected to the mixing and stirring reactor (2), and the other end is directly connected to the ground. Along the direction away from the mixing and stirring reactor (2), a safety valve (26#) and a safety valve (35#) are installed in sequence; the two ends of the vent line branch are connected to the vent line main line respectively, and a reactor venting cross-line ball valve (25#) is installed on it.

[0115] Specifically, in the combustion unit, the incinerator (6) and the secondary combustion chamber (5) are connected. One side of the secondary combustion chamber (5) is connected to the spray gun device (7). One end of the air supply device (4) is connected to the spray gun device (7). The air supply device (4) and the spray gun device (7) are connected through an air supply pipeline. Along the direction close to the spray gun device (4), a pressure regulating valve (29#), a control valve (30#), and a first one-way valve (31#) are sequentially installed on the air supply pipeline. One end of the spray gun device (4) is connected to the secondary combustion chamber (5), and the other end is provided with a spray gun blockage observation port and a spray gun blockage maintenance port (21).

[0116] One end of the secondary combustion chamber material line (17) is connected to the liquid connection line (8) in the mixing and stirring reactor (2), and the other end is connected to the spray gun device (7). Along the direction away from the material line (16) of the raw material tank, the secondary combustion chamber material line (17) is sequentially equipped with a reactor discharge line ball valve (17#), a secondary combustion chamber material solenoid valve (18#), a secondary combustion chamber material line main valve (19#), a first secondary combustion chamber spray gun inlet ball valve (20#), a second secondary combustion chamber spray gun inlet ball valve (21#), a secondary combustion chamber material inlet solenoid valve (22#), and a second check valve (32#). Between the secondary combustion chamber material solenoid valve (18#) and the secondary combustion chamber material line main valve (19#), a secondary combustion chamber material line pressure gauge (PG3) is installed at the end closest to the secondary combustion chamber material line main valve (19#).

[0117] The nitrogen backflush line (18) is connected in parallel with the nitrogen main line (12) and the secondary combustion chamber material line (17). One end of the nitrogen backflush line (18) is connected to the nitrogen main line (12) and is located at the vaporizer outlet pressure regulating valve (2#) and the nitrogen line main valve (3#), near the end of the nitrogen line main valve (3#). The other end of the nitrogen backflush line (18) is located between the first secondary combustion chamber spray gun inlet ball valve (20#) and the second secondary combustion chamber spray gun inlet ball valve (21#). Along the direction away from the nitrogen main line (12), the nitrogen backflush line ball valve (24#) and the secondary combustion chamber nitrogen backflush line ball valve (23#) are sequentially installed on the nitrogen backflush line (18).

[0118] In the purging and venting unit, the two ends of the nitrogen purging material line (19) are connected to the nitrogen main line (12) and the secondary combustion chamber material line (17) respectively. One end of the nitrogen purging material line (19) is located between the nitrogen main line main valve (3#) on the nitrogen main line and the reactor inlet nitrogen solenoid valve (4#) on the first nitrogen branch line. The other end of the nitrogen purging material line (19) is located between the reactor outlet ball valve (17#) and the secondary combustion chamber material solenoid valve (18#). The nitrogen purging material line (19) is equipped with a first nitrogen purging material line ball valve (6#) and a second nitrogen purging material line ball valve (7#).

[0119] The aluminum residue incineration treatment system also includes two nitrogen slingers. The first nitrogen slinger (33#) is located on the secondary combustion chamber material line (17), between the secondary combustion chamber material solenoid valve (18#) and the secondary combustion chamber material line pressure gauge (PG3).

[0120] The second nitrogen blower (34#) is located on the nitrogen backflush line (18), between the nitrogen backflush line ball valve (24#) and the secondary combustion chamber nitrogen backflush line ball valve (23#), near the end of the secondary combustion chamber nitrogen backflush line ball valve (23#).

[0121] The nitrogen main line (12) and the vent line main line are connected by a nitrogen purging vent line (22), and a nitrogen purging vent line ball valve (8#) is installed on the nitrogen purging vent line (22).

[0122] Among them, the diameters of the raw material tank inlet material line (16) and its valves, the secondary combustion chamber material line (17) and its valves, and the vent line (20) and its valves are all equal, all being DN50; the diameters of the nitrogen line (11) and its valves, the nitrogen backflush line (18) and its valves, the nitrogen purging material line (19) and its valves, and the nitrogen purging vent line (22) and its valves are all equal, all being DN20.

[0123] The volume of mixing and stirring reactor 2 is 4m³. 3 The pressure resistance is 0.8 MPa;

[0124] The refractoriness of the refractory materials in the secondary combustion chamber and incinerator is ≥2000℃;

[0125] The spray gun is made of high-purity steel with a fire resistance of ≥2000℃;

[0126] The raw material tank has a volume of 2m³ and a pressure rating of 0.6MPa.

[0127] Example 2

[0128] This embodiment provides a process for incinerating aluminum residue after the production of triisobutylaluminum, specifically for a volume of 1.5m³. 3 Approximately one ton of aluminum residue was incinerated using the incineration system described in Example 1, including the following steps:

[0129] S1: Based on the maximum volume of the raw material tank, store the on-site materials in the raw material tank in a fixed quantity;

[0130] The maximum volume of the raw material tank is 2m³. 3 The material volume is 1.5m³. 3The amount is approximately 1 ton. In actual operation, after storing the on-site materials in a quantitative amount in the raw material tank, the raw material tank is connected to the nitrogen line and the raw material tank inlet material line, and the raw material tank is connected to the incineration treatment system.

[0131] S2: Perform an airtightness test on the raw material tank. After the airtightness is qualified, introduce nitrogen into the raw material tank through the nitrogen line to purge and agitate the material in the raw material tank, so that the solid and liquid are fully mixed.

[0132] In actual operation, first open the vaporizer inlet valve (1#) and the vaporizer outlet regulating valve (2#), and adjust the opening degree of the vaporizer inlet valve (1#) and the vaporizer outlet regulating valve (2#). The vaporizer inlet valve (1#) is fully open, and the opening degree of the vaporizer outlet regulating valve (2#) is 30%, so as to maintain the vaporizer (10) outlet pressure at 0.4-0.6MPa and provide high-purity pressure for the entire incineration treatment system.

[0133] Then open the main nitrogen line valve (3#, fully open) and observe the nitrogen line pressure gauge (PG2). A PG2 reading of 0.5 MPa indicates normal nitrogen system pressure. Open the following valves: nitrogen line ball valve (11#), nitrogen hose connection ball valve (12#), first nitrogen purge feed line ball valve (9#), second nitrogen purge feed line ball valve (10#), material hose connection ball valve (13#), reactor material inlet solenoid valve (14#), and raw material tank inlet material line ball valve (15#) (all valves should be fully open). Perform an airtightness test on the two flange connections at the base of the raw material tank (i.e., when nitrogen is introduced into the nitrogen line, the pressure should be checked when the nitrogen line pressure is within 50 MPa). After the nitrogen line in Table PG2 is pressurized to above 0.4 MPa, it is tested with soapy water to confirm that there are no external bubbles, and the airtightness is qualified. After the airtightness is qualified, the material valve (27#) and the nitrogen valve (28#) at the bottom of the raw material tank are opened, and nitrogen is introduced into the raw material tank (3) through the nitrogen line (11). The material in the raw material tank (3) is purged and stirred by the material insertion line (9) to make the solid and liquid fully mixed. After the raw material tank (3) is pressurized to 0.4 MPa, the ball valve (9#) of the first nitrogen purging feed line and the ball valve (10#) of the second nitrogen purging feed line are closed to prepare for pressing the material into the mixing and stirring reactor (2).

[0134] S3: Using the nitrogen pressure in the raw material tank, all the material in the raw material tank is forced into the mixing and stirring reactor through the raw material tank feed line, and the material in the reactor is fully stirred by the motor;

[0135] In actual operation, the venting ball valve (25#) and the feed ball valve (16#) of the reactor are opened and fully opened. The material in the raw material tank (3) is forced into the mixing and stirring reactor (2) by the pressure (0.4-0.6MPa) inside the raw material tank (3).

[0136] The sound of air passing through the material line (16) of the raw material tank indicates that the material in the raw material tank (3) has been completely compressed.

[0137] Continue to use the residual pressure in the raw material tank (3) to purge the raw material tank feed line (16) into the mixing and stirring reactor (2), ensuring that there is no residual material in the raw material tank feed line (16). After the raw material tank feed line (16) is purged, close the raw material tank root material valve (27#), the material hose connection line ball valve (13#), the reactor material inlet solenoid valve (14#), the raw material tank feed line ball valve (15#), the reactor feed line ball valve (16#), and the reactor venting cross-line ball valve (25#). The motor frequency conversion is 37%, and the stirring time is 2 hours.

[0138] S4: Ignite the fuel in the incinerator to keep the fuel burning continuously;

[0139] S5: After the material in the mixing and stirring reactor is stirred, nitrogen gas is introduced into the mixing and stirring reactor for pressurization. After pressurization to the specified pressure range, the pressure in the mixing and stirring reactor is maintained within the specified range. Using the nitrogen pressure in the mixing and stirring reactor, the material in the mixing and stirring reactor is continuously forced into the spray gun device through the material line in the secondary combustion chamber. The spray gun device sprays the material into the secondary combustion chamber, and the material is fully combusted in the secondary combustion chamber and the incinerator.

[0140] In actual operation, after stirring is completed, the nitrogen inlet solenoid valve (4#, 40% opening) and the nitrogen tank root valve (5#, fully open) of the reactor are opened to pressurize the mixing reactor (2) with nitrogen. After pressurizing to 0.4MPa, the reactor outlet ball valve (17#), the secondary combustion chamber material solenoid valve (18#), the secondary combustion chamber material line main valve (19#), the first secondary combustion chamber spray gun inlet ball valve (20#), and the second secondary combustion chamber spray gun inlet ball valve are opened on the secondary combustion chamber material line (17). Valve (21#), secondary combustion chamber material inlet solenoid valve (22#), and second check valve (32#). Among them, the secondary combustion chamber material solenoid valve (18#) is 50% open, the secondary combustion chamber material inlet solenoid valve (22#) is 22% open, and the other valves are fully open. Material is pressurized to the spray gun device (7) through the secondary combustion chamber material line (17), and the spray gun device (7) sprays material into the secondary combustion chamber (5). The feed rate is 50kg / h, and the material is fully burned in the secondary combustion chamber (5) and the incinerator (6).

[0141] In the air supply device (4), the air supply device (4) is opened synchronously when the spray gun device (7) sprays material into the secondary combustion chamber (5). Through the precise adjustment of the control valve (30#), pressure regulating valve (29#) and the first one-way valve (31#) of the air supply device (4) (control valve 30# opening 50%, pressure regulating valve 29# opening 30%, first one-way valve 31# fully open), it is ensured that the volume ratio of the air supplied by the air supply device (4) to the material in the spray gun device (7) is 1:3 after entering the spray gun device (7).

[0142] S6: The liquid level of the material in the mixing and stirring reactor is below the full liquid level line, and all the material in the reactor has been pressed into the spray gun and sprayed.

[0143] S7: After all the material in the mixing and stirring reactor has been pressed into the spray gun and sprayed into the secondary combustion chamber and incinerator for complete combustion, nitrogen is used to purge the remaining material in the spray gun device into the secondary combustion chamber for combustion.

[0144] In actual operation, after all the material in the mixing reactor (2) has been pressed into the spray gun device (7) and sprayed into the secondary combustion chamber (5) and incinerator (6) for complete combustion, the first secondary combustion chamber spray gun feed ball valve (20#) on the secondary combustion chamber material line (17) is closed. At this time, the reactor discharge line ball valve (17#), the secondary combustion chamber material solenoid valve (18#), and the secondary combustion chamber material line main valve (19#) are still fully open; then the nitrogen backflush line ball valve (24#, fully open) and the second The combustion chamber nitrogen backflush line ball valve (23#, fully open), the first nitrogen purging material line ball valve (6#, fully open), the second nitrogen purging material line ball valve (7#, fully open), and the nitrogen purging vent line ball valve (8#, fully open) are used to blow the material in the spray gun metal hose into the secondary combustion chamber (5) and the incinerator (6) for combustion until no more material is sprayed out from the spray gun device (7). Then the second secondary combustion chamber spray gun inlet ball valve (21#) and the secondary combustion chamber material inlet solenoid valve (22#) are closed.

[0145] S8: Depressurize the mixing and stirring reactor to 0MPa, use nitrogen to backflush the residual material in the secondary combustion chamber material line into the mixing and stirring reactor, and shut down the system after purging.

[0146] In actual operation, open the venting cross-line ball valve (25#, fully open) of the reactor to depressurize the mixing and stirring reactor (2) to 0MPa, and then open the feed ball valve (20#, fully open) of the first secondary combustion chamber spray gun. Use nitrogen to backflush the residual material in the secondary combustion chamber material line (17) into the mixing and stirring reactor (2) to avoid material residue in the secondary combustion chamber material line (17). After purging, close the reactor discharge line ball valve (17#), the secondary combustion chamber material solenoid valve (18#), the secondary combustion chamber material line main valve (19#), and the first secondary combustion chamber spray gun feed ball valve (20#) set on the secondary combustion chamber material line (17). Close the secondary combustion chamber nitrogen backflush line ball valve (23#) and the nitrogen backflush line ball valve (24#) set on the nitrogen backflush line (18).

[0147] In this embodiment, the volume of aluminum residue processed is 1.5m³. 3 It takes about 20 hours to process approximately 1 ton of wastewater at a rate of 50 kg / h.

[0148] Example 3

[0149] This embodiment is intended for a volume of 1.5m³. 3 Approximately 1 ton of aluminum residue was incinerated, using the same system and process as in Example 2.

[0150] The difference is that, in the incineration treatment method of this embodiment, in step S2, the opening degree of the vaporizer outlet regulating valve (2#) is 40%;

[0151] In this embodiment, the volume of aluminum residue processed is 1.5m³. 3 It takes about 1 ton to process, with a processing efficiency of 40 kg / h and a processing time of about 25 hours.

[0152] Example 4

[0153] This embodiment is intended for a volume of 1.5m³. 3 Approximately 1 ton of aluminum residue was incinerated, using the same system and process as in Example 2.

[0154] The difference lies in the fact that, in the incineration method of this embodiment, the frequency conversion of the motor in step S3 is 45%.

[0155] In this embodiment, the volume of aluminum residue processed is 1.5m³. 3 It takes about 1 ton to process, with a processing efficiency of 40 kg / h and a processing time of about 25 hours.

[0156] Example 5

[0157] This embodiment is intended for a volume of 1.5m³. 3 Approximately 1 ton of aluminum residue was incinerated, using the same system and process as in Example 2.

[0158] The difference lies in the fact that, in the incineration treatment method of this embodiment, in step S5, the opening degree of the nitrogen inlet solenoid valve 4# is 50%, the opening degree of the material inlet solenoid valve (18#) is 55%, and the opening degree of the material inlet solenoid valve (22#) is 30%.

[0159] In this embodiment, the volume of aluminum residue processed is 1.5m³. 3 It takes about 1 ton to process, with a processing efficiency of 40 kg / h and a processing time of about 25 hours.

[0160] Example 6

[0161] This embodiment is intended for a volume of 1.5m³. 3 Approximately 1 ton of aluminum residue was incinerated, using the same system and process as in Example 2.

[0162] The difference is that in the incineration treatment method of this embodiment, in step S6, the control valve 30# is opened to 55%, the pressure regulating valve 29# is opened to 35%, and the first one-way valve 31# is fully open, so as to ensure that the air supplied by the air supply device (4) enters the spray gun device (7) and the volume ratio of the air to the material in the spray gun device (7) is 1:4.

[0163] In this embodiment, the volume of aluminum residue processed is 1.5m³. 3 It takes about 33 hours to process approximately 1 ton of wastewater at a rate of 30 kg / h.

[0164] Comparative Example 1

[0165] This comparative example shows the treatment of aluminum residue from the production of triisobutylaluminum using a cement kiln degradation method. The volume of the aluminum residue was 1.5 m3, approximately 1 ton.

[0166] The steps for degrading aluminum residue after triisobutylaluminum production in a cement kiln are as follows:

[0167] S1: Aluminum residue pretreatment

[0168] The aluminum residue after the production of triisobutylaluminum is collected in the raw material tank;

[0169] The aluminum residue in the raw material tank is pressed into the distillation kettle. The volatile substances such as triisobutylaluminum and n-hexane in the aluminum residue are vaporized by heating and then condensed and recovered. The remaining solid residue is left in the distillation kettle.

[0170] During the distillation and separation of aluminum residue, a large amount of heat is released when it comes into contact with water, so water needs to be added slowly. The processing efficiency of the distillation and separation is about 5 kg / h.

[0171] S2: Aluminum residue mixed with cement raw materials

[0172] The aluminum residue after distillation and purification is mixed with cement raw materials at a ratio of 1:10 to ensure that the mixed material meets the chemical requirements for cement production.

[0173] S3: Add the mixed materials into the cement kiln.

[0174] The mixed material is fed into the kiln tail decomposition furnace through the lifting facility, and the material feeding rate is controlled at 0.8-1t / h;

[0175] S4: Cement kiln calcination

[0176] Inside the cement kiln, the mixed materials are calcined at a high temperature of 1500℃. This high temperature decomposes organic matter and harmful components in the residue, while also allowing metal oxides such as aluminum to participate in the formation of cement clinker.

[0177] The exhaust gas generated during the calcination process needs to be purified. The exhaust gas treatment system of cement kiln uses a high-temperature environment to convert the reducing gases (NH3, H2, etc.) in the residue into harmless gases.

[0178] S5: Follow-up processing

[0179] After calcination, the cement clinker is processed according to the normal cement production process to finally produce cement products; the remaining valuable by-products (such as alumina, alkali metal salts, etc.) are recycled.

[0180] This comparative example demonstrates the degradation treatment of 1 ton of aluminum residue from triisobutylaluminum production in a cement kiln. The process requires separating triisobutylaluminum and volatile substances such as n-hexane from the aluminum residue as much as possible. During the distillation separation process, the aluminum residue releases a large amount of heat upon contact with water, necessitating slow water addition. The distillation separation efficiency is approximately 5 kg / h. Subsequently, the mixed material is fed into a cement kiln for calcination, which takes approximately 2 hours.

[0181] In summary, this comparative example showed that the aluminum residue produced from triisobutylaluminum was treated in a cement kiln with a processing efficiency of approximately 5 kg / h and a processing time of approximately 202 hours, which is about 10 times that of Example 2.

[0182] Comparative Example 2

[0183] The volume of this comparative example is 1.5m³. 3 Approximately 1 ton of aluminum residue was incinerated, using the same system and process as in Example 2.

[0184] The difference is that, in the incineration treatment method of this comparative example, in step S2, the opening degree of the vaporizer outlet regulating valve (2#) is 10%.

[0185] In this comparative example of aluminum residue treatment, the opening degree of the vaporizer outlet regulating valve (2#) did not meet the requirements of this invention, resulting in a low treatment efficiency of 25 kg / h and a treatment time of about 40 hours, which is twice that of Example 2.

[0186] Comparative Example 3

[0187] The volume of this comparative example is 1.5m³. 3 Approximately 1 ton of aluminum residue was incinerated, using the same system and process as in Example 2.

[0188] The difference lies in the fact that, in the incineration method of this comparative example, the frequency conversion of the motor in step S3 is 10%.

[0189] In this comparative example of aluminum residue treatment, the motor frequency converter did not meet the requirements of the present invention, resulting in insufficient material mixing. The treatment efficiency of this comparative example was 20 kg / h, and the time taken was about 50 hours, which is 2.5 times that of Example 2.

[0190] Comparative Example 4

[0191] The volume of this comparative example is 1.5m³. 3 Approximately 1 ton of aluminum residue was incinerated, using the same system and process as in Example 2.

[0192] The difference is that in the incineration treatment method of this embodiment, in step S5, the opening degree of the nitrogen inlet solenoid valve 4# is 10%, the opening degree of the material inlet solenoid valve (18#) is 15%, and the opening degree of the material inlet solenoid valve (22#) is 10%.

[0193] In this comparative example of aluminum residue treatment, the opening of the nitrogen inlet solenoid valve #4, the opening of the material inlet solenoid valve (18#) to the secondary combustion chamber, and the opening of the material inlet solenoid valve (22#) to the secondary combustion chamber do not meet the requirements of this invention, which makes the material very easy to clog the pipeline. The treatment efficiency is 20 kg / h, and the time taken is about 50 hours, which is twice that of Example 2.

[0194] Comparative Example 5

[0195] The volume of this comparative example is 1.5m³. 3 Approximately 1 ton of aluminum residue was incinerated, using the same system and process as in Example 2.

[0196] The difference is that in the incineration treatment method of this comparative example, in step S6, the control valve 30# is opened to 15%, the pressure regulating valve 29# is opened to 15%, and the first one-way valve 31# is fully open, so as to ensure that the air supplied by the air supply device (4) enters the spray gun device (7) and the volume ratio of the air to the material in the spray gun device (7) is 1:2.

[0197] In the process of treating aluminum residue in this comparative example, the control valve 30# is opened at 15%, the pressure regulating valve 29# is opened at 15%, and the first one-way valve 31# is fully open. This makes the volume ratio of the air supplied by the air supply device (4) to the material in the spray gun device (7) 1:2, which does not meet the requirements of this invention and results in incomplete combustion of the material. The treatment efficiency of this comparative example is 10 kg / h, and the time taken is about 100 hours, which is 5 times that of Example 2.

[0198] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A process for incinerating aluminum residue after the production of triisobutylaluminum, characterized in that, Includes the following steps: S1: Based on the maximum volume of the raw material tank, store the on-site materials in the raw material tank in a fixed quantity; S2: Perform an airtightness test on the raw material tank. After the airtightness is qualified, introduce nitrogen into the raw material tank through the nitrogen line to purge and agitate the material in the raw material tank, so that the solid and liquid are fully mixed. S3: Using the nitrogen pressure in the raw material tank, all the material in the raw material tank is forced into the mixing and stirring reactor through the raw material tank feed line, and the material in the mixing and stirring reactor is fully stirred by the motor; S4: Ignite the fuel in the incinerator to keep the fuel burning continuously; S5: After the material in the mixing and stirring reactor is stirred, nitrogen gas is introduced into the mixing and stirring reactor for pressurization. After pressurization to the specified pressure range, the pressure in the mixing and stirring reactor is maintained within the specified range. Using the nitrogen pressure in the mixing and stirring reactor, the material in the mixing and stirring reactor is continuously forced into the spray gun device through the material line in the secondary combustion chamber. The spray gun device sprays the material into the secondary combustion chamber, and the air supply device is turned on at the same time. The material is fully combusted in the secondary combustion chamber and the incinerator. S6: Determine whether all the material in the mixing and stirring reactor has been pressed into the spray gun and sprayed completely based on whether the liquid level of the material in the mixing and stirring reactor is below the liquid level line. S7: After all the material in the mixing and stirring reactor has been pressed into the spray gun and sprayed into the secondary combustion chamber and incinerator for complete combustion, nitrogen is used to purge the remaining material in the spray gun into the secondary combustion chamber for combustion. S8: Depressurize the mixing and stirring reactor to 0MPa, use nitrogen to backflush the residual material in the secondary combustion chamber material line into the mixing and stirring reactor, and shut down the system after purging.

2. The aluminum residue incineration treatment process according to claim 1, characterized in that, In step S1, the on-site material quantity is ≤ 80% of the maximum volume of the raw material tank.

3. The aluminum residue incineration treatment process according to claim 2, characterized in that, In step S2, the nitrogen pressure is 0.4-0.6 MPa.

4. The aluminum residue incineration treatment process according to claim 3, characterized in that, In step S3, the motor frequency conversion is 37-66%, and the stirring time is 1-2 hours.

5. The aluminum residue incineration treatment process according to claim 4, characterized in that, In step S5, the specified pressure range is 0.2MPa-0.4MPa.

6. The aluminum residue incineration treatment process according to claim 5, characterized in that, In step S5, the air supply device provides air to the spray gun device, and the volume ratio of the provided air to the material in the air supply device is ≤1:

3.

7. The aluminum residue incineration treatment process according to claim 1, characterized in that, The diameters of the material inlet line of the raw material tank and the material inlet line of the secondary combustion chamber are equal and both are ≥DN50; The diameter of the nitrogen line is ≥DN20, and is simultaneously smaller than the diameter of the material line from the raw material tank to the reactor and the material line from the secondary combustion chamber.

8. The aluminum residue incineration treatment process according to claim 7, characterized in that, The nitrogen line is equipped with a vaporizer inlet valve (1#) and a vaporizer outlet regulating valve (2#). The vaporizer outlet regulating valve (2#) is opened at 20-50% during the aluminum residue incineration process, and the vaporizer inlet valve (1#) is opened at 100% during the aluminum residue incineration process.

9. The aluminum residue incineration treatment process according to claim 8, characterized in that, The secondary combustion chamber material line is equipped with a secondary combustion chamber material solenoid valve (18#) and a secondary combustion chamber material inlet solenoid valve (22#). The opening degree of the secondary combustion chamber material solenoid valve (18#) and the secondary combustion chamber material inlet solenoid valve (22#) is 20-80% during the aluminum residue incineration process.

10. A system for incinerating aluminum residue after the production of triisobutylaluminum, used to implement the aluminum residue incineration process method according to any one of claims 1-9, characterized in that, Includes a feeding unit, a processing unit, and a combustion unit; The feeding unit includes a cryogenic liquid nitrogen storage tank (1), a raw material tank (3), a vaporizer (10), a nitrogen line (11), and a raw material tank feed line (16); The processing unit includes a mixing and stirring reactor (2), which is equipped with a motor (M) and a liquid power supply (8). The combustion unit includes an incinerator (6), a secondary combustion chamber (5), a spray gun device (7), an air supply device (4), a secondary combustion chamber material line (17), and a nitrogen backflushing line (18); The cryogenic liquid nitrogen storage tank (1) is connected to the raw material tank (3) via a nitrogen line (11); the raw material tank (3) is connected to the liquid inlet line (8) of the mixing and stirring reactor (2) via a raw material tank inlet material line (16); the spray gun device (7) is connected to the liquid inlet line (8) of the mixing and stirring reactor (2) via a secondary combustion chamber material line (17); and the two ends of the nitrogen backflush line (18) are connected to the secondary combustion chamber material line (17) and the nitrogen line (11) respectively.

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