A system for incinerating aluminum residue after production of triisobutyl aluminum

Abstract

The utility model relates to a kind of aluminium residue incineration treatment systems after production triisobutyl aluminium, belong to triisobutyl aluminium technical field, solve the problem of low efficiency of existing incineration system processing.The system includes feeding unit, processing unit, combustion unit;Feeding unit includes low-temperature liquid nitrogen storage tank, raw material tank, vaporizer, nitrogen line and raw material tank inlet material line, nitrogen line includes nitrogen main line, first nitrogen branch line, second nitrogen branch line and third nitrogen branch line;Processing unit includes mixed stirring reaction kettle, motor and liquid full plug wire are installed in mixed stirring reaction kettle;Combustion unit includes incinerator, two combustion chamber, spray gun device, air supply device, two combustion chamber material line and nitrogen backflush line.The system processing efficiency is high.

Description

Technical Field

[0001] This utility model relates to the field of triisobutylaluminum technology, and in particular to an aluminum residue incineration treatment system after the production of triisobutylaluminum. Background Technology

[0002] Triisobutylaluminum is an important organoaluminum compound, a colorless and transparent liquid with wide applications. The residue generated during its production contains various chemical substances, such as triisobutylaluminum, n-hexane, and aluminum oxide. If this aluminum residue is discharged directly without treatment, it will cause serious environmental pollution. Furthermore, aluminum residue is flammable in air and releases heat violently when it comes into contact with water. If the residue is not properly handled, it may cause fires or explosions, posing a threat to the safety of personnel and equipment.

[0003] 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. This necessitates a distillation separation unit within the system. 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.

[0004] Therefore, it is necessary to continuously improve and optimize the high-temperature incineration system for aluminum residues generated after the production of triisobutylaluminum. Summary of the Invention

[0005] Based on the above analysis, the present invention aims to provide an aluminum residue incineration treatment system 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.

[0006] The objective of this utility model is mainly achieved through the following technical solutions:

[0007] This utility model provides an aluminum residue incineration treatment system after the production of triisobutylaluminum, including a feeding unit, a processing unit, and a combustion unit;

[0008] 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);

[0009] The processing unit includes a mixing and stirring reactor (2), which is equipped with a motor (M) and a liquid power supply (8).

[0010] 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);

[0011] 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.

[0012] Furthermore, 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 feed line (16) are respectively connected to the nitrogen main line (12) through the parallel branch lines.

[0013] Furthermore, the branch line includes a first nitrogen branch line (13), a second nitrogen branch line (14), and a third nitrogen branch line (15);

[0014] The first nitrogen branch line (13) is connected to the nitrogen main line (12) at one end and to the mixing and stirring reactor (2) at the other end; the second nitrogen branch line (14) is connected to the nitrogen main line (12) at one end and to the raw material tank feed line (16) at the other end; the third nitrogen branch line (15) is connected to the nitrogen main line (12) at one end and to the raw material tank (3) at the other end.

[0015] Furthermore, the mixing and stirring reactor (2) is connected to a vent line (20), which includes a main vent line and branch vent lines.

[0016] Furthermore, 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).

[0017] The nitrogen purging material line (19) is connected at both ends to the nitrogen main line (12) and the secondary combustion chamber material line (17);

[0018] The nitrogen purging and venting line (22) is connected at both ends to the nitrogen main line (12) and the venting line (20).

[0019] Furthermore, valves are provided 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.

[0020] Furthermore, in the feeding unit, a cryogenic liquid nitrogen tank pressure gauge (PG) and a glass plate level gauge (LG) are installed on one side of the cryogenic liquid nitrogen tank (1).

[0021] Furthermore, in the combustion unit, the incinerator (6) and the secondary combustion chamber (5) are connected;

[0022] The secondary combustion chamber (5) is connected to a spray gun device (7) on one side, and the air supply device (4) and the spray gun device (7) are connected by an air supply pipeline.

[0023] Furthermore, along the direction away from the cryogenic liquid nitrogen storage tank (1), the nitrogen main 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);

[0024] Along the direction away from the mixing and stirring reactor (2), the main vent line is sequentially equipped with a reactor safety valve front valve (26#) and a safety valve (35#);

[0025] A venting ball valve (25#) is installed on the venting line branch of the reactor.

[0026] Furthermore, the diameters of the raw material tank inlet material line (16) and the valves thereon, the secondary combustion chamber material line (17) and the valves thereon, and the vent line (20) and the valves thereon are all equal and ≥DN50;

[0027] The diameters of the nitrogen line (11) and the valves thereon, the nitrogen backflush line (18) and the valves thereon, the nitrogen purging material line (19) and the valves thereon, and the nitrogen purging vent line (22) and the valves thereon 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).

[0028] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0029] 1. The aluminum residue incineration treatment system after the production of triisobutylaluminum of this utility model 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 material lines and nitrogen backflushing lines in the feeding unit, processing unit, combustion unit and purging and venting unit, which greatly improves the safety of the treatment process.

[0030] 2. The aluminum residue incineration treatment system of this utility model, after the production of triisobutylaluminum, through precise control of valves at various points in the system, such as the nitrogen line, the raw material tank inlet line, the vent line, the secondary combustion chamber material line, the nitrogen backflushing line, the nitrogen purging material line, and the nitrogen purging vent line, regulates the flow of nitrogen and materials, controls the feed rate to the incinerator and the secondary combustion chamber, ensures the continuity and safe control of aluminum residue material processing, and improves processing efficiency; the incineration treatment system of this utility model can achieve a processing efficiency of 50 kg / h, which is more than 10 times more efficient than the existing hydrolysis method or cement kiln for processing aluminum residue.

[0031] 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 will become apparent from the description or be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained from the description and accompanying drawings, which are particularly pointed out. Attached Figure Description

[0032] The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0033] Figure 1 This is a diagram showing the composition of the aluminum residue incineration treatment system of this utility model.

[0034] Figure label:

[0035] 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-line; 9- Material full-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 inlet line; 17- Secondary combustion chamber material line; 18- Nitrogen backflushing line; 19- Nitrogen purging material line; 20- Vent line; 21- Spray gun blockage observation. Inspection port and spray gun blockage maintenance port; 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 valve. 8# - Nitrogen purging and venting 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

[0036] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a 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.

[0037] This utility model provides an aluminum residue incineration treatment system after the production of triisobutylaluminum, including a feeding unit, a processing unit, and a combustion unit;

[0038] 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);

[0039] 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.

[0040] 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);

[0041] 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.

[0042] 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.

[0043] 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).

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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#).

[0048] 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#).

[0049] 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.

[0050] 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).

[0051] 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#).

[0052] 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).

[0053] 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#).

[0054] 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).

[0055] 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#).

[0056] 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).

[0057] 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);

[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] Raw material tank volume ≥ 2m 3 Pressure resistance ≥0.6Mpa.

[0062] The aluminum residue incineration treatment system of this utility model can be applied in actual use through the following steps:

[0063] 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;

[0064] S2: Perform an airtightness test on the raw material tank. After the airtightness is qualified, introduce nitrogen into the raw material tank to purge and agitate the material in the raw material tank, so that the solid and liquid are fully mixed.

[0065] 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, and the material in the mixing and stirring reactor is fully stirred by the motor;

[0066] S4: Ignite the fuel in the incinerator to keep the fuel burning continuously;

[0067] 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. 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.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] 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.

[0072] 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.

[0073] 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%, 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).

[0074] 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).

[0075] 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 material inlet line (16) of the raw material tank into the mixing and stirring reactor (2), ensuring that there is no residual material in the material inlet line (16) of the raw material tank. After the material inlet line (16) of the raw material tank is purged, close the material valve (27#) at the bottom of the raw material tank, the ball valve (13#) of the material hose connection line, the solenoid valve (14#) of the reactor material inlet, the ball valve (15#) of the raw material tank inlet line, the ball valve (16#) of the reactor feed line, and the ball valve (25#) of the reactor venting line. The motor frequency conversion is 37%-66%, and the stirring time is 1-2 hours.

[0076] 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.

[0077] 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.

[0078] 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).

[0079] 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 nitrogen inlet solenoid valve (4#), the material inlet solenoid valve (18#) to the secondary combustion chamber and the material inlet solenoid valve (22#) of the secondary combustion chamber is 20-80%, and the other valves are fully open.

[0080] 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.

[0081] 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.

[0082] 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.

[0083] 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 material 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 material line (19) and nitrogen purging vent line (22) are closed.

[0084] 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#).

[0085] 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.

[0086] 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).

[0087] This invention relates to an aluminum residue incineration system for the production of triisobutylaluminum. Through the design of nitrogen lines, nitrogen purging material lines, and nitrogen backflushing lines in the feeding unit, processing unit, combustion unit, and purging / venting unit, the system ensures that the aluminum residue does not come into contact with air before entering the incinerator and secondary combustion chamber, greatly improving the safety of the processing. Simultaneously, precise control of valves throughout the system regulates the feed rate to the incinerator and secondary combustion chamber, ensuring continuous and safe control of the aluminum residue material processing and improving processing efficiency. This incineration system achieves a processing efficiency of 50 kg / h, which is more than 10 times higher than the efficiency of existing hydrolysis methods or cement kilns for processing aluminum residue.

[0088] Example 1

[0089] This embodiment provides a system for incinerating aluminum residue after the production of triisobutylaluminum, such as... Figure 1 As shown, an aluminum residue incineration treatment system after the production of triisobutylaluminum includes a feeding unit, a processing unit, a combustion unit, and a purging and venting unit.

[0090] 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);

[0091] 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.

[0092] 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);

[0093] The purging and venting unit includes a nitrogen purging material line (19) and a nitrogen purging and venting line (22); the two ends of the nitrogen purging material line (19) are respectively connected to the nitrogen main line (12) and the secondary combustion chamber material line (17); the two ends of the nitrogen purging and venting line (22) are respectively connected to the nitrogen main line (12) and the venting line (20).

[0094] 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.

[0095] 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.

[0096] 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).

[0097] 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.

[0098] 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.

[0099] 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#).

[0100] 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#).

[0101] 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.

[0102] 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).

[0103] 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#).

[0104] 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).

[0105] 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#).

[0106] 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).

[0107] 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#).

[0108] 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).

[0109] 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.

[0110] The volume of mixing and stirring reactor 2 is 4m³. 3 The pressure resistance is 0.8 MPa;

[0111] The refractoriness of the refractory materials in the secondary combustion chamber and incinerator is ≥2000℃;

[0112] The spray gun is made of high-purity steel with a fire resistance of ≥2000℃;

[0113] Raw material tank volume 2m 3 The pressure resistance is 0.6 MPa.

[0114] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model.

Claims

1. A system for incinerating aluminum residue after the production of triisobutylaluminum, 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.

2. The aluminum residue incineration treatment system according to claim 1, characterized in that, 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 feed line (16) are respectively connected to the nitrogen main line (12) through the branch lines set in parallel.

3. The aluminum residue incineration treatment system according to claim 2, characterized in that, The branch lines include a first nitrogen branch line (13), a second nitrogen branch line (14), and a third nitrogen branch line (15). The first nitrogen branch line (13) is connected to the nitrogen main line (12) at one end and to the mixing and stirring reactor (2) at the other end; the second nitrogen branch line (14) is connected to the nitrogen main line (12) at one end and to the raw material tank feed line (16) at the other end; the third nitrogen branch line (15) is connected to the nitrogen main line (12) at one end and to the raw material tank (3) at the other end.

4. The aluminum residue incineration treatment system according to claim 2, characterized in that, The mixing and stirring reactor (2) is connected to a vent line (20), which includes a main vent line and vent line branches.

5. The aluminum residue incineration treatment system according to claim 2, characterized in that, 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.

6. The aluminum residue incineration treatment system according to claim 5, characterized in that, Valves are provided 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.

7. The aluminum residue incineration treatment system according to claim 1, characterized in that, In the feeding unit, a cryogenic liquid nitrogen tank pressure gauge (PG) and a glass plate level gauge (LG) are installed on one side of the cryogenic liquid nitrogen tank (1).

8. The aluminum residue incineration treatment system according to claim 1, characterized in that, In the combustion unit, the incinerator (6) and the secondary combustion chamber (5) are connected; The secondary combustion chamber (5) is connected to a spray gun device (7) on one side, and the air supply device (4) and the spray gun device (7) are connected by an air supply pipeline.

9. The aluminum residue incineration treatment system according to claim 4, characterized in that, Along the direction away from the cryogenic liquid nitrogen storage tank (1), the nitrogen main 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). Along the direction away from the mixing and stirring reactor (2), the main vent line is sequentially equipped with a reactor safety valve front valve (26#) and a safety valve (35#). A venting ball valve (25#) is installed on the venting line branch of the reactor.

10. The aluminum residue incineration treatment system according to claim 9, characterized in that, The diameters of the raw material tank inlet material line (16) and the valves thereon, the secondary combustion chamber material line (17) and the valves thereon, and the vent line (20) and the valves thereon are all equal and all ≥DN50. The diameters of the nitrogen line (11) and the valves thereon, the nitrogen backflush line (18) and the valves thereon, the nitrogen purging material line (19) and the valves thereon, and the nitrogen purging vent line (22) and the valves thereon 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).

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