System and method for controlling auto push of injector

Abstract

According to a disclosed embodiment, an auto-push control system comprises: a reactor including an outer wall; an injector passing through the outer wall of the reactor to be inserted into the reactor; a sensor disposed in the injector; and a control unit for adjusting a speed at which the injector is inserted into the reactor. The control unit calculates the loss length of the injector on the basis of a signal from the sensor, and compensates for the insertion length of the injector on the basis of the calculated loss length of the injector and the predetermined insertion length of the injector according to the insertion speed of the injector.

Description

Auto-push control system and auto-push control method for injector

[0001] The present disclosure relates to an auto-push control system and an auto-push control method for an injector. More specifically, the present disclosure relates to an auto-push control system and an auto-push control method for detecting and compensating for the length loss of an injector due to heat and / or friction within the reactor, in an injector inserted at a constant speed toward the interior of a reactor.

[0002] In processes such as Direct Reduction Smelting (DRS) performed in a reactor, injectors are provided to supply oxygen, cooling water, nitrogen, and carbon into the reactor. The injectors are inserted into the reactor, and the high-temperature environment within the reactor can cause cracks and wear due to thermal shock. Consequently, replacing the injectors requires significant time and expense.

[0003] As a solution, the introduction of an auto-push function for the injector is being considered to ensure that the injector is inserted into the reactor at a constant speed. However, it is difficult to monitor the remaining length of the injector inserted into the reactor in real time, making it difficult to maintain the gap between the end of the injector and the outer wall of the reactor.

[0004] If the gap between the end of the injector and the outer wall of the reactor is too large, damage to the end of the injector is aggravated, shortening the injector replacement cycle. If the gap between the end of the injector and the outer wall of the reactor is too small, the refractory material of the outer wall may be damaged due to the high temperature of the end of the injector that emits oxygen, etc.

[0005] Even with the auto-push function of the injector described above, it is difficult to maintain a gap between the end of the injector inside the furnace and the outer wall of the reactor, and thus the refractory material of the injector or the outer wall may be deformed and / or damaged by heat. Embodiments of the present disclosure relate to an auto-push control system and an auto-push control method for an injector that can solve the above-described problems.

[0006] One aspect of the present disclosure provides embodiments of an auto-push control system for an injector. According to a representative embodiment, the auto-push control system includes a reactor including an outer wall, an injector inserted through the outer wall of the reactor toward the interior of the reactor, a sensor disposed on the injector, and a control unit for controlling a speed at which the injector is inserted toward the interior of the reactor, wherein the control unit calculates a loss length of the injector based on a signal from the sensor, and compensates for the insertion length of the injector based on an insertion length according to a preset insertion speed of the injector and the calculated loss length of the injector.

[0007] In one embodiment, the sensor includes a first sensor and a second sensor, and the distances from the end of the injector to the positions of the first sensor and the second sensor are different.

[0008] In one embodiment, the sensor further includes a third sensor, and the positions of the first sensor, the second sensor, and the third sensor are equidistant with respect to the length direction of the injector.

[0009] In one embodiment, the equal spacing between the positions of the first sensor, the second sensor, and the third sensor is in the range of 50 mm to 150 mm.

[0010] In one embodiment, the compensation length (L) of the injector is inserted into the compensation c ) is calculated by the following formula,

[0011] L c =SL n

[0012] In the above equation, S corresponds to the straight-line distance from the molten metal injection part of the injector to the sensor, and L in the above equation n is the insertion speed (v) of the above preset injector. n ) and the auto push insertion length derived by the product of the time taken for insertion.

[0013] In one embodiment, the outer wall of the reactor comprises a plurality of refractory bricks.

[0014] In one embodiment, the outer wall of the reactor comprises a plurality of refractory bricks, the plurality of refractory bricks comprising conical bricks and square bricks, the conical bricks arranged to surround the injector and the square bricks arranged spaced apart from the injector.

[0015] In one embodiment, the sensor may be a thermocouple sensor.

[0016] In one embodiment, the sensors are arranged continuously along the length of the injector.

[0017] In one embodiment, the injector comprises a first injector and a second injector, the first injector supplying oxygen to the reactor and the second injector supplying carbon to the reactor.

[0018] In one embodiment, the injector has a tubular shape and the sensor is positioned inside the injector.

[0019] Another aspect of the present disclosure provides embodiments of an auto-push control method. According to a representative embodiment, the auto-push control method includes the steps of supplying a reactant into the interior of the reactor through an injector, injecting the injector toward the interior of the reactor at a constant speed, recognizing a signal by a sensor and transmitting it to a control unit, and calculating a difference between an insertion length of the injector according to a preset insertion speed and a distance from the end of the injector to a position of a sensor to compensate for the insertion length of the injector.

[0020] In one embodiment, the injector comprises a first injector and a second injector, the first injector supplies oxygen to the reactor, the second injector supplies carbon to the reactor, and the injectors inject into the interior of the reactor at a rate faster than that of the second injector.

[0021] According to the auto-push control system and auto-push control method of the present disclosure, by maintaining a constant gap between the end of the injector inserted into the interior of the reactor and the refractory on the outer wall, deformation and damage to the refractory due to heat can be minimized. Furthermore, according to the auto-push control system and auto-push control method of the present disclosure, by shortening the maintenance time for the injector and the refractory, operational productivity can be improved.

[0022] Figure 1 is a configuration diagram of an auto push control system according to one embodiment.

[0023] Figures 2a and 2b are enlarged views of area A of Figure 1.

[0024] Figure 3 illustrates the injector, sensor and control unit.

[0025] Figure 4 is an enlarged view of area B of Figure 3.

[0026] Fig. 5 is a configuration diagram of an auto push control system according to another embodiment.

[0027] Figure 6 is a flowchart of an auto push control method according to one embodiment.

[0028] The embodiments of this disclosure are provided for the purpose of illustrating the technical concepts of this disclosure. The scope of rights under this disclosure is not limited to the embodiments presented below or the specific descriptions of these embodiments.

[0029] All technical and scientific terms used in this disclosure, unless otherwise defined, have the meanings commonly understood by those of ordinary skill in the art to which this disclosure pertains. All terms used in this disclosure have been selected for the purpose of more clearly explaining this disclosure and are not intended to limit the scope of rights under this disclosure.

[0030] Expressions such as “including,” “comprising,” “having,” and the like used in this disclosure should be understood as open-ended terms that imply the possibility of including other embodiments, unless otherwise stated in the phrase or sentence in which the expression is included.

[0031] The singular forms described in this disclosure may include plural meanings unless otherwise stated, and the same applies to the singular forms described in the claims.

[0032] The expressions “first,” “second,” etc. used in this disclosure are used to distinguish between multiple components, and do not limit the order or importance of the components.

[0033] In this disclosure, when a component is referred to as being "connected" or "connected" to another component, it should be understood that the component can be directly connected or connected to the other component, or can be connected or connected via a new other component.

[0034] The dimensions and values ​​described in this disclosure are not limited to the described dimensions and values. Unless otherwise specified, these dimensions and values ​​can be understood to mean the described values ​​and equivalent ranges including them. For example, the dimension "50 mm" described in this disclosure can be understood to include "about 50 mm."

[0035] In the present disclosure, the term "melt injection portion" may be understood to mean the part of the injector that first contacts the molten metal inside the reactor when the initial injector is inserted into the reactor. On the other hand, the term "injector end" may be understood to mean the part of the injector that is furthest from the refractory material among the remaining injector lengths when the injector is damaged as it is inserted into the reactor.

[0036] Hereinafter, embodiments of the present disclosure will be described with reference to the attached drawings. In the attached drawings, identical or corresponding components are assigned the same reference numerals. Furthermore, in the description of the embodiments below, redundant descriptions of identical or corresponding components may be omitted. However, even if a description of a component is omitted, it is not intended that such component is not included in any embodiment.

[0037] Fig. 1 is a configuration diagram of an auto push control system (1) according to one embodiment. Figs. 2a and 2b are enlarged views of area A of Fig. 1.

[0038] Referring to FIGS. 1, 2a, and 2b, the auto-push control system (1) is configured to maintain a gap between the end of an injector inserted into the interior of a reactor to supply oxygen, carbon, nitrogen, cooling water, etc. into the interior of the reactor and the outer wall of the reactor. If the gap between the end of the injector and the outer wall of the reactor is excessively large, damage to the end of the injector is aggravated, shortening the injector replacement cycle. In addition, if the gap between the end of the injector and the outer wall of the reactor is excessively small, the refractory of the outer wall may be damaged due to the high temperature of the end of the injector that discharges oxygen, etc. Therefore, it is essential to maintain a gap between the end of the injector and the outer wall of the reactor, and this is to prevent deformation and damage to the refractory forming part of the outer wall of the reactor due to heat.

[0039] The auto push control system (1) may include a reactor (11), an injector (12), a sensor (13), and a control unit (14).

[0040] The reactor (11) may include an outer wall (110) and an inner space (C). The outer wall (110) is arranged to surround the surface of the reactor, and the inner space (C) may correspond to the inner space of the reactor formed by the outer wall (110). The outer wall (110) may be formed of a heat-resistant material. The outer wall (110) may include a steel shell (111) and a plurality of refractory bricks (112). The steel shell (111) may form the outermost surface of the outer wall (110). The steel shell (111) may prevent high-temperature materials filled in the inner space (C) from leaking. The refractory bricks (112) may be arranged adjacent to the inner wall of the steel shell (111). The refractory brick (112) may be composed of an oxide material such as Mg or Cr, and may minimize heat from high-temperature materials filling the internal space (C) from being discharged to the outside. The refractory brick (112) may include a cone-shaped brick (112a) and a square brick (112b). The cone-shaped brick (112a) may have a cone or frustum shape whose cross-sectional area increases from the outside to the inside of the reactor (11). The cone-shaped brick (112a) may be arranged to surround the injector (12). The square brick (112b) may have a hexahedral or rectangular parallelepiped shape. The square brick (112b) may be arranged to be spaced apart from the injector (12).

[0041] The internal space (C) may correspond to a space surrounded by an outer wall (110). The internal space (C) may be filled with molten, high-temperature materials. The molten, high-temperature materials may include, for example, lead ore, lead scrap, and lead byproducts.

[0042] The injector (12) may be arranged to penetrate the outer wall (110) of the reactor (11). The injector (12) may be formed in a cylindrical shape. The injector (12) may supply a reaction material (e.g., oxygen in the case of an oxidation zone, carbon in the case of a reduction zone), cooling water, and other gases, etc., to the internal space (C) of the reactor (11). The injector (12) inserted into the interior of the reactor (11) may come into direct contact with high-temperature materials filled in the internal space (C) of the reactor (11). Therefore, the injector (12) may be manufactured from a heat-resistant material.

[0043] The injector (12) can be slowly inserted in a direction (F) toward the inside of the reactor (11). That is, the injector (12) can be pushed so as to be slowly inserted toward the inner space (C) by penetrating the outer wall (110) of the reactor (11). This is defined as auto push of the injector. In one embodiment, the injector (12) can be inserted at a constant speed in a direction (F) toward the inside of the reactor (11). For example, the injector (12) of the oxidation zone can be inserted at a speed of 0.2 mm / hr, and the injector (12) of the reduction zone can be inserted at a speed of 0.1 mm / hr. As the injector (12) is slowly pushed into the inside of the reactor (11), even if a loss of length occurs due to wear and cracks caused by high temperature at the end (12A) of the injector (12), the distance between the outer wall (110) of the reactor (11) and the end (12A) of the injector (12) can be maintained to a certain extent.

[0044] The sensor (13) can detect the length lost due to long-term exposure of the end (12A) of the injector (12) to high temperatures. The sensor (13) can be disposed in the injector (12). The sensor (13) can be disposed inside the tubular injector (12). The sensor (13) can include a plurality of sensors (13). For example, the sensor (13) can include a first sensor (13a) and a second sensor (13b). The sensor (13) can further include a third sensor (13c). The sensor (13) can further include a fourth sensor (13d). The distances from the molten metal injection portion (121) of the injector (12) to the plurality of sensors (13) can be different from each other. The distances from the molten metal injection portion (121) to the sensors (13) will be described in more detail below with reference to FIGS. 3 and 4.

[0045] The sensor (13) may include any common type of sensor capable of detecting operation (e.g., on / off). Preferably, the sensor may include a sensor capable of detecting a rise in temperature or heat. More preferably, it may be a thermocouple sensor. A thermocouple is a device made of two types of metals that utilizes the Seebeck effect to measure a wide range of temperatures.

[0046] According to another embodiment, the sensor (13) may be arranged continuously along the length of the injector (12). As the sensor (13) is arranged continuously along the length of the injector (12), the length of the injector (12) inserted into the reactor (11) can be known in real time.

[0047] The control unit (14) can be connected to the opposite end of the molten metal injection unit (121) of the injector (12). The control unit (14) can receive a signal from the sensor (13). The control unit (14) can adjust the speed and / or length at which the injector (12) is inserted in a direction (F) toward the inside of the reactor (11). The control unit (14) can calculate the loss length (S) of the injector (12) based on the signal from the sensor (13). The control unit (14) can adjust the insertion speed (v) of the injector (12). n ) and auto push insertion length (L) according to elapsed time n ) can be calculated. The control unit (14) calculates the loss length (S) and the auto push insertion length (L) of the injector (12). n ) based on the compensation length (L) c ) can be inserted. That is, the control unit (14) controls the loss length (S) of the injector (12) and the auto push insertion length (L n ) and calculate the compensation length (L) by that difference. c ) can be inserted.

[0048] Referring to FIGS. 2a and 2b, the insertion compensation length (L) of the control unit (14) c ) will be described in detail as to how to determine the wear. Fig. 2a illustrates the injector (12) before wear occurs. Fig. 2b illustrates the injector (12) at the moment when the first sensor (13a) detects the loss of the injector and generates a signal. In Fig. 2a, the second sensor (13b) is positioned parallel to the refractory bricks (112) before the injector (12) is worn. While the injector (12) is worn by heat, the injector (12) can move toward the interior of the reactor (11). Preferably, the injector (12) moves toward the interior of the reactor (11) at a constant velocity (v n) can be moved to. When the injector (12) is gradually worn from the molten metal injection part (121) by high-temperature materials stored inside the reactor (11) to the position where the first sensor (13a) is placed, the first sensor (13a) can detect this and transmit a signal to the control unit (14). The distance from the molten metal injection part (121) to the first sensor (13a) corresponds to the loss length (S) of the injector (12). While the injector (12) is lost by the loss length (S), the injector (12) moves at a constant speed (v n ) and move to Auto Push Insertion Length (L n ) can be inserted into the inside of the reactor (11). At this time, in order to keep the distance (T) from the end (12A) of the injector (12) to the refractory brick (112) constant, the auto push insertion length (L) is adjusted from the loss length (S) of the injector (12). n ) must be compensated for. That is, the control unit (14) must compensate for the auto push insertion length (L) from the loss length (S) of the injector (12). n ) is positive, the compensation length (L) of the injector (12) is directed toward the inside of the reactor (11). c ) can be additionally inserted. The auto push insertion length (L) in the loss length (S) of the injector (12) n ) is negative, the control unit (14) moves the injector (12) toward the outside of the reactor (11) with a compensation length (L c ) can be discharged. That is, the compensation length (L c ) is the auto push insertion length (L) in the loss length (S) of the injector (12). n ) is the length minus the length.

[0049] For example, if the distance from the molten metal injection part (121) to the first sensor (13a) is 100 mm, the loss length (S) of the injector (12) can be calculated by generating a signal by detecting the loss of the injector (12) as the injector (12) wears out through the first sensor (13a). That is, the loss length (S) of the injector (12) at this time is 100 mm. The auto push insertion length (L) is calculated based on the time from the insertion point of the injector (12) to the detection point of the first sensor (13a) and the auto push speed of the injector (12). n ) can be calculated. For example, if the auto push speed is 0.2 mm / hr and the first sensor (13a) detects the loss of the injector (12) in exactly 15 days, the auto push insertion length (L n ) is, 15 days 24hrs It is calculated by 0.2 mm / hr and corresponds to 72 mm. In this case, while the injector (12) is worn by a loss length (S) of 100 mm, the auto push insertion length (L) of the injector (12) by the auto push n ) is only 72mm, so the compensation length (L) is 28mm, which is the difference between the two lengths. c ) can be compensated.

[0050] Fig. 3 illustrates an injector (12), a sensor (13), and a control unit (14). Fig. 4 is an enlarged view of area B of Fig. 3. Referring to Figs. 3 and 4, a plurality of sensors (13) may be arranged inside the injector (12). The sensors (13) may include a first sensor (13a), a second sensor (13b), a third sensor (13c), and a fourth sensor (13d). The distances from the end (12A) of the injector (12) to each of the first sensor (13a), the second sensor (13b), the third sensor (13c), and the fourth sensor (13d) may be different from each other. The positions of the first sensor (13a), the second sensor (13b), the third sensor (13c), and the fourth sensor (13d) may be equally spaced with respect to the longitudinal direction of the injector (12). For example, the distance (L1) from the end (12A) of the injector to the first sensor (13a) may be 50 mm to 150 mm. The distance (L2) between the first sensor (13a) and the second sensor (13b) may correspond to the distance (L3) between the second sensor (13b) and the third sensor (13c). The distance (L3) between the second sensor (13b) and the third sensor (13c) may correspond to the distance (L4) between the third sensor (13c) and the fourth sensor (13d). At this time, L2, L3, and L4 may be 50 mm to 150 mm.

[0051] Fig. 5 is a configuration diagram of an auto push control system (2) according to another embodiment.

[0052] The description of the auto-push control system according to the embodiment described above with reference to FIGS. 1 to 4 also applies to the auto-push control system according to another embodiment described below with reference to FIG. 5. Hereinafter, with reference to FIG. 5, the auto-push control system according to another embodiment will be described with a focus on differences from the embodiment described above, as follows.

[0053] Referring to FIG. 5, the auto push control system (2) may include two internal spaces (C1, C2), two injectors (221, 222), two sets of sensors (231, 232) and two control units (241, 242).

[0054] The reactor (21) may include two internal spaces (C1, C2). The internal spaces (C1, C2) include a first internal space (C1) and a second internal space (C2). The first internal space (C1) and the second internal space (C2) may be separated by a partition wall (25). The partition wall (25) may include a communication hole (25a). The communication hole (25a) may be formed in a direction crossing the partition wall (25) so that the first internal space (C1) and the second internal space (C2) may be in fluid communication with each other. In another embodiment, the first internal space (C1) and the second internal space (C2) may be completely blocked by the partition wall (25) to form independent spaces.

[0055] For example, the first internal space (C1) serves as an oxidation zone, and the first injector (221) inserted into the oxidation zone supplies oxygen, nitrogen, and cooling water to the first internal space (C1). The average temperature of the first internal space (C1) may range from, for example, 1000°C to 1150°C. The second internal space (C2) serves as a reduction zone, and the second injector (222) inserted into the reduction zone supplies carbon (C) for reaction and cooling water to the second internal space (C2). The average temperature of the second internal space (C2) may range from, for example, 1100°C to 1250°C.

[0056] Since the first injector (221) supplies oxygen as a heat source, an oxidation reaction occurs around the end of the first injector (221) (e.g., the end (12A) of FIGS. 2A and 2B), and the temperature in the X region may be in the range of about 1500°C to 1600°C. On the other hand, the second injector (221) may supply carbon. The second injector (221) may not supply oxygen. In this case, an oxidation reaction does not occur around the end (12A) of the second injector (222), and the temperature in the Y region may be in the range of about 1200°C to 1300°C. That is, since the temperature range of the peripheral area (e.g., X area) of the first injector (221) is higher than the temperature range of the peripheral area (e.g., Y area) of the second injector (222), the wear of the injector tip described above with reference to FIGS. 1 to 4 may occur relatively actively in the first injector (221). Accordingly, the speed (v1) at which the first injector (221) is inserted toward the internal space (C1) may be faster than the speed (v2) at which the second injector (222) is inserted toward the internal space (C2). For example, the first injector (221) may be inserted inward at a rate of 0.2 mm / hr. For example, the second injector (222) may be inserted inward at a rate of 0.1 mm / hr.

[0057] Fig. 6 is a flowchart of an auto push control method (S300) according to one embodiment. The auto push control method (S300) may include a step of supplying a reactant into the interior of a reactor through an injector (S310), a step of inserting the injector at a constant speed toward the interior of the reactor (S320), a step of detecting a loss length of the injector by a sensor (S330), a step of transmitting a signal from the sensor to a control unit (S340), and a step of compensating for the insertion length of the injector by calculating a difference between the insertion length according to a preset insertion speed of the injector and the distance from the molten metal injection portion of the injector to the position of the sensor (S350).

[0058] The step (350) of calculating the insertion length according to the insertion speed of the preset injector (e.g., the injector (12) of FIG. 1) and the difference in the distance from the molten metal injection portion (e.g., the molten metal injection portion (121) of FIG. 2a) of the injector (12) to the position of the sensor (e.g., the sensor (13) of FIG. 1) to compensate for the insertion length of the injector (12) may be performed by the process described above with reference to FIGS. 2a and 2b.

[0059] Although the process steps, method steps, algorithms, etc., are described in a sequential order in the flowchart illustrated in FIG. 6, such processes, methods, and algorithms may be configured to operate in any suitable order. In other words, the steps of the processes, methods, and algorithms described in various embodiments of the present disclosure need not be performed in the order described herein. Furthermore, even if some steps are described as being performed asynchronously, in other embodiments, such some steps may be performed concurrently. Furthermore, the illustration of a process by depiction in the drawings does not imply that the illustrated process excludes other variations and modifications thereof, nor does it imply that the illustrated process or any of its steps is essential to one or more of the various embodiments of the present disclosure, nor does it imply that the illustrated process is preferred.

[0060] By the auto-push control system and auto-push control method according to the above-described embodiments, unnecessary loss of the injector (e.g., the injector (12) of FIG. 1) can be prevented, and deterioration and damage of the refractory brick (e.g., the refractory brick (112) of FIG. 1) arranged around the injector (12) can be reduced. In addition, by reducing deterioration and damage of the refractory brick (112), the maintenance time and cost of the reactor (e.g., the reactor (11) of FIG. 1) can be shortened, and operational productivity can be increased.

[0061] While the technical concept of the present disclosure has been described above with reference to certain embodiments and examples illustrated in the accompanying drawings, it should be understood that various substitutions, modifications, and variations may be made without departing from the technical concept and scope of the present disclosure, which would be understood by those skilled in the art to which the present disclosure pertains. Furthermore, such substitutions, modifications, and variations should be considered to fall within the scope of the appended claims.

Claims

1. A reactor, including an outer wall; An injector that penetrates the outer wall of the reactor and is inserted toward the interior of the reactor; a sensor placed in the above injector; and A control unit for controlling the length or speed at which the injector is inserted toward the interior of the reactor; Including, The control unit calculates the loss length of the injector based on the signal from the sensor, and compensates for the insertion length of the injector based on the insertion length according to the preset insertion speed of the injector and the calculated loss length of the injector. Auto push control system.

2. In paragraph 1, The above sensor includes a first sensor and a second sensor, and the distances from the end of the injector to the positions of the first sensor and the second sensor are different. Auto push control system.

3. In paragraph 2, The above sensor further includes a third sensor, The positions of the first sensor, the second sensor and the third sensor are equidistant with respect to the longitudinal direction of the injector. Auto push control system.

4. In paragraph 3, The equal interval between the positions of the first sensor, the second sensor and the third sensor is in a range of 50 mm to 150 mm. Auto push control system.

5. In paragraph 1, The compensation length (L) of the above injector is inserted c ) is calculated by the following formula, L c =S-L n In the above equation, S corresponds to the straight-line distance from the molten metal injection part of the injector to the sensor, In the above equation, L n is the insertion speed (v) of the above preset injector. n ) and the auto push insertion length derived by the product of the time taken for insertion, Auto push control system.

6. In paragraph 1, The outer wall of the above reactor comprises a plurality of refractory bricks. Auto push control system.

7. In paragraph 6, The outer wall of the above reactor comprises a plurality of refractory bricks, The above plurality of refractory bricks include conical bricks and square bricks, The above cone-shaped bricks are arranged to surround the injector, The above square bricks are arranged spaced apart from the injector, Auto push control system.

8. In paragraph 1, The above sensor is a thermocouple sensor. Auto push control system.

9. In paragraph 1, The above sensors are arranged continuously along the length of the injector. Auto push control system.

10. In paragraph 1, The above injector comprises a first injector and a second injector, The above first injector supplies oxygen to the reactor, The second injector supplies carbon to the reactor. Auto push control system.

11. In paragraph 1, The above injector has a tubular shape, The above sensor is placed inside the injector, Auto push control system.

12. In the auto push control method of the injector using the auto push control system according to Article 1, A step of supplying a reactant into the interior of the reactor through the injector; A step in which the injector is inserted toward the interior of the reactor at a constant speed; A step in which the above sensor recognizes a signal and transmits it to the control unit; A step for calculating the insertion length according to the preset insertion speed of the injector and the difference in the distance from the end of the injector to the position of the sensor, thereby compensating for the insertion length of the injector; Including, Auto push control method.

13. In paragraph 12, The above injector comprises a first injector and a second injector, The above first injector supplies oxygen to the reactor, The second injector supplies carbon to the reactor, The speed at which the above injector injects into the interior of the reactor is such that the first injector is faster than the second injector. Auto push control method.

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