Nitrogen gas temperature control system for methane gas-reducing catalyst filter regeneration, and method thereof

Abstract

Disclosed are a nitrogen gas temperature control system for methane gas-reducing catalyst filter regeneration, and a method thereof. The nitrogen gas temperature control system for methane gas-reducing catalyst filter regeneration, according to one embodiment of the present invention, comprises: a case provided in the form of a pipe and having an injection port and a discharge port in the respective ends thereof; an insulating material inserted inside the case; a heating coil provided inside the insulating material; and a control unit for controlling the inflow of nitrogen gas into the case, and heating the nitrogen gas introduced into the case to a preset target temperature. The control unit comprises: a gas injection unit for injecting nitrogen gas into the case through the injection port provided in the case; a heating control unit for measuring the nitrogen gas temperature at the injection port and the discharge port through at least one temperature sensor provided inside the case, and controlling a current applied to the heating coil; and a display unit for displaying at least any one among whether the heating coil is generating heat, the cumulative heat generation time of the heating coil, the flow rate and pressure of the nitrogen gas injected into the case, the nitrogen gas temperature at the injection port area, and the nitrogen gas temperature at the discharge port area. The heating coil has a hollow spiral structure in which a heat wire is wound in an elliptical shape surrounding the hollow.

Description

Nitrogen gas temperature control system and method for regenerating a methane gas reduction catalyst filter

[0001] The present invention relates to a nitrogen gas temperature control system and method thereof, and more particularly, to a nitrogen gas temperature control system and method thereof for regenerating a methane gas reduction catalyst filter, which generates high-temperature nitrogen gas for regenerating a methane gas reduction catalyst filter by applying current to a heater coil.

[0002] Engine exhaust gas from LNG-fueled DF vessels typically contains methane. Therefore, treatment technology is needed to reliably remove methane contained in the exhaust gas.

[0003] Conventionally, methane reduction catalysts are placed within the exhaust pipe through which exhaust gas flows to reduce methane content. These catalysts may contain manganese (Mn), platinum (Pt), cobalt (Co), palladium (Pd), or other elements, and are placed within the exhaust pipe to obstruct the flow of exhaust gas.

[0004] However, ship exhaust gas may contain moisture and sulfur, which react with the methane reduction catalyst. This can lead to the formation of Pd(OH)2 and PdS02 on the surface of the methane reduction catalyst.

[0005] In this case, there is a problem that the reactivity between the methane reduction catalyst and methane is reduced due to the substance generated on the surface, thereby reducing the methane reduction effect.

[0006] To solve these problems, various methane reduction catalyst regeneration systems have been disclosed that can maintain the methane reduction effect by removing substances generated on the surface of the methane reduction catalyst.

[0007] Korean Patent Publication No. 10-2024-0059886 discloses a methane reduction catalyst regeneration system that injects compressed gas into the methane reduction catalyst to remove impurities attached to the surface of the methane reduction catalyst, and Korean Patent Publication No. 10-2011-0013217 discloses an exhaust gas heating device for diesel particulate filter regeneration.

[0008] Furthermore, there is a need for research on a nitrogen gas temperature control system and method for methane reduction catalyst filter regeneration that can quickly produce high-temperature dry gas optimized for filter regeneration to solve the above-described problems and effectively regenerate the methane reduction catalyst.

[0009] The purpose of the present invention is to provide a nitrogen gas temperature control system and method for regenerating a methane gas reduction catalyst filter, which includes a heating coil having a spiral structure, thereby minimizing deformation of the coil shape due to softening at high temperatures and improving the durability of the heater.

[0010] In addition, the purpose of the present invention is to provide a nitrogen gas temperature control system and method for regenerating a methane gas reduction catalyst filter, which can quickly heat the nitrogen gas to the target temperature within a set time by monitoring the temperature of the nitrogen gas injected into the case and correcting the current applied to the heater coil if the nitrogen gas is not heated to the target temperature within a set time.

[0011] The problems to be solved by the present invention are not limited to the problems mentioned above, and other problems to be solved by the present invention that are not mentioned herein will be clearly understood by a person having ordinary skill in the technical field to which the present invention pertains from the description below.

[0012] A nitrogen gas temperature control system for regeneration of a methane gas reduction catalyst filter according to an embodiment of the present invention comprises: a case formed in a pipe shape and having an inlet and an outlet at both ends; an insulating material inserted into the case; a heating coil provided inside the insulating material; and a control unit for controlling the inflow of nitrogen gas into the case and heating the nitrogen gas introduced into the case to a preset target temperature, wherein the control unit comprises a gas injector for injecting nitrogen gas into the case through an inlet provided in the case; a heating control unit for measuring the nitrogen gas temperatures of the inlet and the outlet through at least one temperature sensor provided inside the case and controlling the current applied to the heating coil; and a display unit for displaying at least one of whether the heating coil is heated, a heating cumulative time of the heating coil, a flow rate of nitrogen gas injected into the case, a pressure, a nitrogen gas temperature in an inlet region, and the nitrogen gas temperature in an outlet region, wherein the heating coil has a hollow spiral structure, and is characterized in that a heating wire is wound in an oval shape surrounding the hollow structure.

[0013] In addition, the gas injection unit includes an injection condition receiving unit that receives flow rate conditions and pressure conditions of nitrogen gas to be injected into the case through the injection port from a preset manager terminal, and a gas transfer control unit that controls the movement of nitrogen gas from a preset nitrogen gas storage container based on the flow rate conditions and pressure conditions of nitrogen gas received by the injection condition receiving unit, and the gas transfer control unit is characterized in that it includes a flow rate control valve provided at a preset distance from the injection port and a pressure regulator provided between the nitrogen gas storage container and the injection port to control the pressure of the nitrogen gas supplied into the case.

[0014] In addition, the heating control unit is characterized by including a gas recognition unit that determines whether nitrogen gas flows into the case through the inlet, including at least one gas sensor; a current control unit that applies current to the heating coil when the inlet of nitrogen gas into the case is recognized; and a current correction unit that measures the temperature of the nitrogen gas in the inlet area and the outlet area through the temperature sensor for a preset first reference time, and corrects the size of the current applied to the heating coil when the temperature of the nitrogen gas is lower than the preset target.

[0015] In addition, the display unit includes a heater data generation unit that generates a heater usage report including whether the heating coil is heated, the accumulated heating time of the heating coil, the flow rate of nitrogen gas injected into the case, the pressure, the nitrogen gas temperature of the inlet area, and the nitrogen gas temperature of the outlet area, and transmits the heater usage report to a pre-designated user terminal, and a heater failure diagnosis unit that diagnoses whether at least one of the gas injection unit and the heating control unit has failed based on the heater usage report generated by the heater data generation unit, and the heater failure diagnosis unit is characterized in that, when a failure occurs in at least one of the gas injection unit and the heating control unit, the failure diagnosis result data that includes the cause of the failure, an expected solution method, and a maintenance procedure is generated and transmitted to the administrator terminal.

[0016] In addition, the current correction unit compares the magnitude of the current applied to the heating coil with the temperature of the nitrogen gas in the discharge port area based on data collected from the temperature sensor to calculate the temperature change per unit time, and corrects the magnitude of the current applied to the heating coil and the current application time based on the temperature change, and the heating control unit further includes a recovery control unit that generates a nitrogen gas recovery control signal for discharging the nitrogen gas in the discharge port area to an auxiliary channel extended from one end of the discharge port and communicated with a predetermined nitrogen gas storage container when the temperature of the nitrogen gas in the discharge port area is lower than the target temperature within a preset second reference time after the current applied to the heating coil is corrected through the current correction unit, and the auxiliary channel includes at least one discharge valve provided at one end, at least one filter provided at the other end for filtering the nitrogen gas flowing in through the discharge valve, and a cooling device provided between the filter and the nitrogen gas storage container for cooling the nitrogen gas filtered by the filter, and the recovery control unit controls the opening and closing state of the discharge valve based on the nitrogen gas recovery control signal, and when the discharge valve is opened, supplies power to the cooling device. It is characterized by controlling.

[0017] According to the present invention, by including a heating coil having a spiral structure, there is an effect of minimizing deformation of the coil shape due to softening at high temperatures and improving the durability of the heater.

[0018] In addition, by monitoring the temperature of nitrogen gas injected into the case and correcting the current applied to the heater coil if the nitrogen gas is not heated to the target temperature within the set time, there is an effect of quickly heating the nitrogen gas to the target temperature within the set time.

[0019] FIG. 1 is a configuration diagram of a nitrogen gas temperature control system for regeneration of a methane gas reduction catalyst filter according to an embodiment of the present invention.

[0020] FIG. 2 is a drawing for explaining a control unit of a nitrogen gas temperature control system for regeneration of a methane gas reduction catalyst filter according to an embodiment of the present invention.

[0021] FIG. 3 is a drawing for explaining a heating coil of a nitrogen gas temperature control system for regeneration of a methane gas reduction catalyst filter according to an embodiment of the present invention.

[0022] FIG. 4 is a drawing for explaining a gas injection unit of a nitrogen gas temperature control system for regeneration of a methane gas reduction catalyst filter according to an embodiment of the present invention.

[0023] FIG. 5 and FIG. 6 are drawings for explaining a heating control unit of a nitrogen gas temperature control system for regeneration of a methane gas reduction catalyst filter according to an embodiment of the present invention.

[0024] FIG. 7 is a drawing for explaining a display unit of a nitrogen gas temperature control system for regeneration of a methane gas reduction catalyst filter according to an embodiment of the present invention.

[0025] Specific details, including the problems to be solved, means of solving the problems, and effects of the invention, related to the present invention are included in the following examples and drawings. The advantages and features of the present invention, and methods for achieving them, will become clearer with reference to the detailed examples described below, along with the accompanying drawings.

[0026] The scope of the present invention is not limited to the embodiments described below, and various modifications may be made by a person having ordinary knowledge in the relevant technical field without departing from the technical spirit of the present invention.

[0027] Hereinafter, the title of the invention of the present invention is described in detail with reference to the attached drawing 1.

[0028] FIG. 1 is a configuration diagram of a nitrogen gas temperature control system for regeneration of a methane gas reduction catalyst filter according to an embodiment of the present invention, FIG. 2 is a diagram for explaining a control unit of a nitrogen gas temperature control system for regeneration of a methane gas reduction catalyst filter according to an embodiment of the present invention, FIG. 3 is a diagram for explaining a heating coil of a nitrogen gas temperature control system for regeneration of a methane gas reduction catalyst filter according to an embodiment of the present invention, FIG. 4 is a diagram for explaining a gas injection unit of a nitrogen gas temperature control system for regeneration of a methane gas reduction catalyst filter according to an embodiment of the present invention, FIGS. 5 and 6 are diagrams for explaining a heating control unit of a nitrogen gas temperature control system for regeneration of a methane gas reduction catalyst filter according to an embodiment of the present invention, and FIG. 7 is a diagram for explaining a display unit of a nitrogen gas temperature control system for regeneration of a methane gas reduction catalyst filter according to an embodiment of the present invention.

[0029]

[0030] Example 1

[0031] Referring to FIGS. 1 and 2, a nitrogen gas temperature control system (100) for regeneration of a methane gas reduction catalyst filter according to an embodiment of the present invention may include a case (110), an insulating material (120), a heating coil (130), and a control unit (140).

[0032] More specifically, the case (110) is provided in a pipe shape and has an inlet and an outlet at both ends, the insulating material (120) is inserted into the case (110), the heating coil (130) is provided inside the insulating material (120), and the control unit (140) controls the inflow of nitrogen gas into the case (110) and can heat the nitrogen gas introduced into the case (110) to a preset target temperature.

[0033] At this time, the control unit (140) may include a gas injection unit (141) that injects nitrogen gas into the case (110) through an injection port provided in the case (110), a heating control unit (142) that measures the nitrogen gas temperature of the injection port and the discharge port through at least one temperature sensor provided inside the case (110) and controls the current applied to the heating coil (130), and a display unit (143) that displays at least one of whether the heating coil (130) is heated, the cumulative heating time of the heating coil (130), the flow rate and pressure of the nitrogen gas injected into the case (110), the nitrogen gas temperature of the injection port area, and the nitrogen gas temperature of the discharge port area.

[0034] For example, it is preferable that the insulating material (120) be made of a ceramic material that does not break even at high temperatures while fixing the heating coil (130).

[0035]

[0036] Meanwhile, as shown in FIG. 3, the heating coil (130) has a hollow spiral structure, but the heating wire can be wound in an elliptical shape surrounding the hollow structure.

[0037] More specifically, when the heating coil is viewed from the front (130a), the heating wire is wound while rotating at a preset angle in a form that surrounds the hollow, and accordingly, when the heating coil is viewed from the side (130b), it can be confirmed that the heating wire is wound in a wave shape.

[0038] Hereinafter, the shape of the hollow body is described in more detail. The shape of the wound heating wire can be formed into a plurality of ellipses that surround the hollow body. In this case, the plurality of ellipses can be wound in a shape in which the center point is located within the hollow body, but the center point is located at the same location, and the plurality of ellipses are all wound in a shape in which the axis of the ellipses rotates at a preset angle around the same center point.

[0039] By providing the heating coil (130) in the shape described above, even if a high current is applied to the heating coil (130), deformation of the shape of the heating coil (130) due to softening can be minimized.

[0040]

[0041] In addition, by additionally inserting a ceramic material insulation into the hollow space of the heating coil (130), the insulation is formed in the double pipe shape, thereby more firmly fixing the heating coil (130) and preventing damage and deformation of the case (110) due to thermal expansion.

[0042]

[0043] Meanwhile, the case (110) can prevent nitrogen gas that has not passed through the heating coil (130) from being mixed in by applying heat-resistant silicone paste to the area where the discharge port is provided, through a separation space formed between the inner diameter area of ​​the case (110) and the outer diameter area of ​​the insulating material (120).

[0044] If nitrogen gas that has not passed through the heating coil (130) is introduced, nitrogen gas heated by the heating coil (130) and nitrogen gas that has not been heated are mixed, and nitrogen gas having a temperature lower than the set target temperature is discharged, which may cause a problem in that the efficiency of regeneration of the methane reduction catalyst filter is reduced.

[0045] Therefore, by applying ultra-high temperature heat-resistant silicone paste to the discharge port area, the gap between the inner diameter of the case (110) and the outer diameter of the insulating material (120) can be blocked, and only nitrogen gas passing through the heating coil (130) can be induced to move to the discharge port area.

[0046]

[0047] Meanwhile, as illustrated in FIG. 4, the gas injection unit (141) may include an injection condition receiving unit (1411) that receives the flow rate and pressure conditions of the nitrogen gas to be injected into the case (110) through the injection port from a preset manager terminal, and a gas transfer control unit (1412) that controls the movement of the nitrogen gas from a preset nitrogen gas storage container based on the flow rate and pressure conditions of the nitrogen gas received by the injection condition receiving unit (1411).

[0048] At this time, the gas transfer control unit (1412) may include a flow control valve provided at a preset distance from the inlet and a pressure regulator provided between the nitrogen gas storage container and the inlet to control the pressure of the nitrogen gas supplied into the case (110).

[0049]

[0050] Referring to FIG. 5, the heating control unit (142) may include a gas recognition unit (1421) that includes at least one gas sensor to determine whether the nitrogen gas flows into the case (110) through the inlet, a current control unit (1422) that applies current to the heating coil (130) when the inflow of the nitrogen gas into the case (110) is recognized, and a current correction unit (1423) that measures the temperature of the nitrogen gas in the inlet area and the outlet area through the temperature sensor for a preset first reference time, and corrects the magnitude of the current applied to the heating coil (130) when the temperature of the nitrogen gas is lower than a preset target.

[0051]

[0052] More specifically, the current correction unit (1423) can calculate the amount of temperature change per unit time by comparing the amount of current applied to the heating coil (130) and the temperature of the nitrogen gas in the discharge port area based on data collected from the temperature sensor, and can correct the amount of current applied to the heating coil and the current application time based on the amount of temperature change.

[0053]

[0054] As illustrated in FIG. 6, when the flow rate of the nitrogen gas to be injected into the case is determined through the injection condition receiving unit (1411), the current input value (I_input) to be applied to the heating coil (130) can be determined based on the preset target heating temperature and target heating time.

[0055] At this time, the reference current input value required to heat the minimum amount of nitrogen gas to be injected into the case (110) to the target heating temperature within the target heating time can be determined in advance through the manager terminal, and the current control unit (1422) can determine the current input value (I_input) corresponding to the nitrogen gas flow rate input to the injection condition receiving unit (1411) in proportion to the reference current input value.

[0056] In addition, after the current input value (I_input) is applied to the heating coil (130) through the current control unit (1422), the current correction unit (1423) can determine whether correction of the current input value (I_input) is necessary by measuring the nitrogen gas temperature (T_measure) of the discharge port area after a preset unit time (t_1).

[0057] For example, if the nitrogen gas temperature (T_measure) of the discharge port area measured at the time point t_1 is less than the target heating temperature (T_goal,t_1), a higher current must be applied to the heater coil (130) to reach the target heating temperature (T_goal) within the target heating time (t_goal), and thus a current correction value (I_modify) that corrects the current input value (I_input) can be calculated.

[0058] The above current correction value (I_modify) is determined based on the slope, which is the temperature change amount per unit time, and when the current input value (I_input) is determined through the current control unit (1422), the predicted slope (610) can be determined.

[0059] Accordingly, the current correction unit (1423) calculates the actual slope (620) at the time point t_1, calculates the correction slope (630) based on the nitrogen gas temperature (T_measure) of the discharge port area measured at the time point t_1 and the predicted slope (610), and calculates the current correction value (I_modify) corresponding to the correction slope (630) in proportion to the predicted slope (610) and the current input value (I_input), and the correction slope (630) can be calculated based on the following [Mathematical Formula 1].

[0060]

[0061] [Mathematical Formula 1]

[0062]

[0063] (Here, α is the slope, and T g is the target heating temperature of nitrogen gas in the outlet area, and T m is the measured temperature of nitrogen gas in the discharge port area, and t g is the target heating time, and t m means the measurement time)

[0064]

[0065] As another example, if the nitrogen gas temperature (T_measure) of the discharge port area measured at the time point t_1 exceeds the target heating temperature (T_goal,t_1), the current compensation unit (1423) can control the nitrogen gas temperature of the discharge port area to become the target heating temperature within the target time by adjusting the application time of the current input value (I_input) applied to the heating coil (130).

[0066] For example, the current input value (I_input) applied to the heating coil (130) is set as a default to be input as DC (direct current), but if it is determined that the current application time should be adjusted through the current correction unit (1423), the current input value (I_input) can be applied to the heating coil (130) in a form having an on / off duty ratio through PWM control or the like.

[0067]

[0068] Meanwhile, if the current correction value (I_modify) is calculated to exceed a preset threshold value (I_limit), it may be determined that current is not normally applied to the heating coil (130), and a notification signal requesting a system inspection may be transmitted to the administrator terminal.

[0069]

[0070] Meanwhile, the heating control unit (140) may further include a recovery control unit (not shown) that generates a nitrogen gas recovery control signal to discharge nitrogen gas in the discharge area through an auxiliary path extended from one end of the discharge area and connected to a predetermined nitrogen gas storage container when the temperature of the nitrogen gas in the discharge area is lower than the target temperature within a preset second reference time after the current applied to the heating coil (130) is corrected through the current correction unit (143).

[0071] That is, by partially discharging the nitrogen gas inside the case (110), the flow rate of the nitrogen gas injected into the case (110) can be temporarily reduced, and heating can be controlled to be performed on the reduced nitrogen gas.

[0072]

[0073] More specifically, the auxiliary flow path may include at least one discharge valve provided at one end, at least one filter provided at the other end for filtering nitrogen gas flowing in through the discharge valve, and a cooling device provided between the filter and the nitrogen gas storage container for cooling the nitrogen gas filtered by the filter.

[0074] In addition, the recovery control unit can control the opening / closing state of the discharge valve based on the nitrogen gas recovery control signal, and control power to be supplied to the cooling device when the discharge valve is opened.

[0075]

[0076] Meanwhile, referring to FIG. 7, the display unit (143) may include a heater data generation unit (1431) that generates a heater usage report including whether the heating coil (130) is heated, the heating cumulative time of the heating coil (130), the flow rate and pressure of nitrogen gas injected into the case (110), the nitrogen gas temperature of the inlet region, and the nitrogen gas temperature of the outlet region, and transmits the heater usage report to a predetermined user terminal, and a heater failure diagnosis unit (1432) that diagnoses whether a failure has occurred in at least one of the gas injection unit (141) and the heating control unit (142) based on the heater usage report generated by the heater data generation unit (1431).

[0077]

[0078] For example, when the heater data generation unit (1431) detects the inflow of nitrogen gas into the case (110) through the gas sensor, the heater data generation unit (1431) may measure the inflow time of the nitrogen gas into the case (110) and the inflow stop time of the nitrogen gas, and may include this in the heater usage report.

[0079] In addition, the heater usage report generated by the heater data generation unit (1431) is applied to a preset machine learning algorithm to calculate optimal conditions for heating nitrogen gas, and an automatic control signal of the nitrogen gas temperature control system (100) for regeneration of the methane gas reduction catalyst filter is generated based on the optimal conditions, and the automatic control signal can be transmitted to the administrator terminal.

[0080] Accordingly, the administrator can review the automatic control signal received through the administrator terminal, and based on the automatic control signal, determine whether to automatically control the nitrogen gas temperature control system (100) for regeneration of the methane gas reduction catalyst filter, thereby generating an automatic control request signal.

[0081] At this time, the automatic control signal includes the optimal flow rate condition and optimal pressure condition of the nitrogen gas to be injected into the case (110) through the injection port, and when the automatic control request signal is received by the injection condition receiving unit (1411), the gas transfer control unit (1412) can inject the nitrogen gas into the case (110) based on the optimal flow rate condition and optimal pressure condition included in the automatic control signal without inputting the flow rate condition and pressure condition of the nitrogen gas through the manager terminal.

[0082]

[0083] In addition, the heater failure diagnosis unit (1432) can generate failure diagnosis result data including the cause of the failure, expected solution, and maintenance procedure when a failure occurs in at least one of the gas injection unit (141) and the heating control unit (142), and transmit the data to the administrator terminal.

[0084]

[0085] As another example, the heater fault diagnosis unit (1432) can monitor the power applied to the control unit (140) and determine whether a leakage current occurs.

[0086] More specifically, the heater fault diagnosis unit (1432) measures the leakage current of the load terminal provided in parallel to the output of the control unit (140), and if the leakage current exceeds a preset reference range, it can be determined that a fault has occurred in the control unit (140).

[0087]

[0088] Therefore, according to the present invention as described above, a nitrogen gas temperature control system and method for regenerating a methane gas reduction catalyst filter can be provided, which includes a heating coil having a spiral structure, thereby minimizing deformation of the coil shape due to softening at high temperatures and improving the durability of the heater.

[0089] In addition, a nitrogen gas temperature control system and method for regenerating a methane gas reduction catalyst filter can be provided, which monitors the temperature of nitrogen gas injected into the case, and, if the nitrogen gas is not heated to the target temperature within a set time, corrects the current applied to the heater coil, thereby quickly heating the nitrogen gas to the target temperature within a set time.

[0090]

[0091] In addition, a method for controlling a nitrogen gas temperature control system for regenerating a methane gas reduction catalyst filter according to an embodiment of the present invention may be recorded on a computer-readable medium including program commands for performing various computer-implemented operations. The computer-readable medium may include program commands, data files, data structures, etc., singly or in combination. The program commands may be specially designed and configured for the present invention or may be known and usable by those skilled in the art of computer software. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tapes, optical media such as CD-ROMs and DVDs, magneto-optical media such as floptical disks, and hardware devices specifically configured to store and execute program commands, such as ROMs, RAMs, and flash memories. Examples of program commands include not only machine language codes generated by a compiler, but also high-level language codes that can be executed by a computer using an interpreter, etc.

[0092]

[0093] Although the embodiments of the present invention have been described with limited examples and drawings, the embodiments of the present invention are not limited to the embodiments described above, and various modifications and variations are possible based on this description by those skilled in the art to which the present invention pertains. Therefore, the embodiments of the present invention should be understood solely by the scope of the claims set forth below, and all equivalent or equivalent modifications thereof are deemed to fall within the scope of the present invention.

[0094]

[0095] 110: Case

[0096] 120: Insulation

[0097] 130: Heating coil

[0098] 140: Control unit 141: Gas injection unit

[0099] 1411: Injection condition receiver

[0100] 1412: Gas transfer control unit

[0101] 142: Heating control unit

[0102] 1421: Gas recognition unit

[0103] 1422: Current control unit

[0104] 1423: Current compensation unit

[0105] 143: Display section

[0106] 1431: Heater data generation unit

[0107] 1432: Heater failure diagnosis section

Claims

1. A case having a pipe shape and an inlet and outlet at both ends; Insulating material inserted inside the case; A heating coil provided inside the above insulating material; and A control unit that controls the inflow of nitrogen gas into the case and heats the nitrogen gas introduced into the case to a preset target temperature; The above control unit, A gas injection unit that injects nitrogen gas into the case through an injection port provided in the case; A heating control unit that measures the nitrogen gas temperature of the inlet and the outlet through at least one temperature sensor provided inside the case and controls the current applied to the heating coil; and A display unit that displays at least one of whether the heating coil is heated, the heating cumulative time of the heating coil, the flow rate and pressure of nitrogen gas injected into the case, the nitrogen gas temperature in the inlet area, and the nitrogen gas temperature in the outlet area; The above heating coil, A nitrogen gas temperature control system for regeneration of a methane gas reduction catalyst filter, characterized in that it has a hollow spiral structure and a heating wire is wound in an elliptical shape surrounding the hollow structure.

2. In paragraph 1, The above gas injection part, An injection condition receiving unit that receives the flow rate and pressure conditions of the nitrogen gas to be injected into the case through the injection port from a preset manager terminal; and A gas transfer control unit that controls the movement of the nitrogen gas from a predetermined nitrogen gas storage container based on the flow rate condition and pressure condition of the nitrogen gas received by the injection condition receiving unit; The above gas transfer control unit, A flow control valve provided at a preset distance from the above injection port; and A nitrogen gas temperature control system for regeneration of a methane gas reduction catalyst filter, characterized in that it includes a pressure regulator provided between the nitrogen gas storage container and the inlet to control the pressure of the nitrogen gas supplied into the case.

3. In paragraph 1, The above heating control unit, A gas recognition unit including at least one gas sensor for determining whether the nitrogen gas is flowing into the case through the inlet; When the inflow of the nitrogen gas into the case is recognized, a current control unit that applies current to the heating coil; and A nitrogen gas temperature control system for regeneration of a methane gas reduction catalyst filter, characterized in that it includes a current correction unit that measures the temperature of the nitrogen gas in the inlet region and the outlet region through the temperature sensor for a preset first reference time, and corrects the size of the current applied to the heating coil when the temperature of the nitrogen gas is lower than a preset target.

4. In paragraph 1, The above display unit, A heater data generation unit that generates a heater usage report including whether the heating coil is heated, the heating cumulative time of the heating coil, the flow rate and pressure of nitrogen gas injected into the case, the nitrogen gas temperature of the inlet area, and the nitrogen gas temperature of the outlet area, and transmits the heater usage report to a pre-designated user terminal; and A heater failure diagnosis unit that diagnoses whether at least one of the gas injection unit and the heating control unit has failed based on the heater usage report generated by the heater data generation unit; The above heater fault diagnosis unit, A nitrogen gas temperature control system for regeneration of a methane gas reduction catalyst filter, characterized in that when a failure occurs in at least one of the gas injection unit and the heating control unit, failure diagnosis result data including the cause of the failure, expected solution method, and maintenance procedure is generated and transmitted to the administrator terminal.

5. In paragraph 3, The above current compensation unit, Based on the data collected from the temperature sensor, the amount of current applied to the heating coil is compared with the temperature of the nitrogen gas in the discharge port area to calculate the amount of temperature change per unit time, and based on the amount of temperature change, the amount of current applied to the heating coil and the current application time are corrected. The above heating control unit, After the current applied to the heating coil is corrected through the current correction unit, if the temperature of the nitrogen gas in the discharge port area is lower than the target temperature within a preset second reference time, a recovery control unit is further included that generates a nitrogen gas recovery control signal for discharging the nitrogen gas in the discharge port area through an auxiliary path extended from one end of the discharge port and connected to a preset nitrogen gas storage container. The above auxiliary euro is, At least one discharge valve provided at a time; At least one filter provided on the other end for filtering nitrogen gas flowing in through the discharge valve; and A cooling device is provided between the filter and the nitrogen gas storage container to cool the nitrogen gas filtered by the filter; The above recovery control unit, A nitrogen gas temperature control system for regeneration of a methane gas reduction catalyst filter, characterized in that the opening / closing state of the discharge valve is controlled based on the nitrogen gas recovery control signal, and power is supplied to the cooling device when the discharge valve is opened.

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