KR102294678B1 - Apparatus for Combustion and the Method for Controlling Combustion - Google Patents

Abstract

The present invention relates to a combustion device and a combustion control method of the combustion device, and more particularly, to a combustion device and a method for controlling the combustion of the combustion device that are stably burned in response to misfire and non-ignition.
The combustion control method of the combustion device of the present invention for realizing this, attempts to ignite by supplying gas at a preset gas supply amount to the combustion device unit. And, when the ignition success is determined, the gas supply amount at the time of successful ignition is set as the minimum gas supply amount, and the combustion state is controlled to be maintained.

Description

Combustion device and combustion control method of combustion device {Apparatus for Combustion and the Method for Controlling Combustion}

The present invention relates to a combustion apparatus and a combustion control method of the combustion apparatus, and more particularly, to a combustion apparatus and a combustion control method of the combustion apparatus that burns stably automatically in response to misfire and non-ignition.

A combustion control method of the combustor cascade system 10 that provides heating and hot water by using combustion of gas according to the prior art will be described with reference to FIG. 1 .

The combustor cascade system 10 is configured as a multi-boiler (10) having a medium-to-large combustor capacity by connecting a plurality of combustor units (11, 12, 13, 14) in parallel.

According to the combustor cascade system 10, the heating capacity can be expanded or reduced by installing the plurality of combustor units 11, 12, 13, and 14 according to the required capacity, and as necessary, the plurality of combustion units can be installed. Some or all of the appliance units 11 , 12 , 13 , and 14 may be operated to provide the amount of heat required for heating and hot water generation and to save energy.

The combustion device 10 has a main air supply line 20 for supplying air, and is branched from the main air supply line 20 and is connected to the plurality of combustion device units 11, 12, 13, and 14, respectively. air supply lines 21 , 22 , 23 , 24 , a main gas discharge line 30 through which combustion gas generated during combustion is discharged, and the plurality of combustion device units branched from the main gas discharge line 30 . Gas discharge lines 31 , 32 , 33 , 34 respectively connected to 11 , 12 , 13 and 14 are provided.

In addition, the combustion device 10 is provided with a gas supply line (not shown) for supplying gas to the plurality of combustion device units (11, 12, 13, 14).

In the plurality of combustion device units 11, 12, 13, and 14, a combustion chamber (not shown) in which gas is combusted, and a heat exchanger (not shown) in which a heat medium is heat exchanged using a flame generated in the combustion chamber as a heat source are provided. is provided, and a heating or hot water pipe (not shown) through which the heating medium heated in the heat exchanger flows to a heating or hot water demanding place (not shown) is connected.

In addition, an igniter (not shown) for igniting a flame in the gas supplied to each of the combustion chambers is provided in the plurality of combustor units 11 , 12 , 13 , and 14 .

In addition, blowers 51 , 52 , 53 , 54 are provided in the plurality of combustor units 11 , 12 , 13 and 14 , respectively, and the rotational speed (RPM) of the blowers 51 , 52 , 53 , 54 . ) to control the inflow of air and gas.

Accordingly, when any one of the plurality of combustor units 11, 12, 13, and 14 is operated, the blowers 51, 52, 53, and 54 of the corresponding combustor unit operate to operate the main air supply line 20 ) and air supply lines (21, 22, 23, 24) connected to the corresponding combustion device unit, and the gas supply line, air and gas are introduced into the corresponding combustion device through The ignition is ignited by the igniter to generate a flame in the combustion chamber, and the combustion gas is discharged to the main gas discharge line 30 through the gas discharge lines 31 , 32 , 33 and 34 connected to the corresponding combustion device.

At this time, when any one of the plurality of combustor units 11, 12, 13, and 14 is operated and the other combustor units 12, 13, and 14 are not operated, the Combustion gas discharged from the combustion device unit 11 to the main gas discharge line 30 flows backward through the gas discharge lines 32, 33, and 34 of the non-operational combustion device units 12, 13, and 14. There could be a situation where it was introduced into the combustion chamber.

That is, due to the reverse flow of the combustion gas, an incombustible atmosphere is formed in the combustion chamber into which the combustion gas is introduced, and then, when the combustion device units 12, 13, and 14 into which the combustion gas is introduced into the combustion chamber are operated, non-ignition or misfire. (失fire) was the cause of the occurrence.

Accordingly, in the combustor cascade system, some combustor units are operated first, and when the generated combustion gas flows back into the remaining partial combustor units to cause misfire or non-ignition, each combustor unit automatically responds and performs re-ignition and research on how to maintain the state of combustion

Also, in general, in a combustion device in which the amount of gas is variably controlled, such as a gas boiler, a turn-down ratio (TDR), which is a ratio of a maximum gas supply amount and a minimum gas supply amount, is fixedly set.

The maximum gas supply is the highest limit of the amount of gas per hour supplied to the combustion device. The gas supply amount is the lowest limit value of the amount of gas per hour supplied to the combustion device, and is applied as the lower limit value of the gas supplied to maintain the combustion state with the minimum thermal power.

In general, the turn-down ratio (TDR) is adjusted according to the minimum gas supply amount, the higher the minimum gas supply amount, the lower the turn-down ratio (TDR), and the lower the minimum gas supply amount, the higher the turn-down ratio (TDR).

At this time, as the turn-down ratio (TDR) is higher, a misfire occurs due to a lack of gas supply, resulting in a problem that the combustion state is not maintained. Excessive unnecessary combustion is performed, resulting in a decrease in the thermal efficiency of the combustion device.

Therefore, research has been made on a method for maintaining the combustion state of the combustion device by adjusting the minimum gas supply amount, but improving the thermal efficiency of the combustion device by maximally increasing the turn-down ratio (TDR).

As a prior art related to the control of the turndown ratio (TDR), Korean Patent Registration No. 10-0805630 is disclosed.

The present invention has been devised to solve the above-described problems, and an object of the present invention is to provide a combustion device that stably re-ignites and burns in response to misfire and non-ignition, and a combustion control method of the combustion device.

In addition, it is an object to provide a combustion device and a combustion control method of the combustion device that can maintain the combustion state of the combustion device by adjusting the minimum gas supply amount, but increase the turn-down ratio (TDR) to the maximum to improve the thermal efficiency of the combustion device. .

The combustion control method of a combustion device of the present invention for solving the above-described problems is a) a) of the plurality of combustion device units, whether only some of the combustion device units are in an operating state, or in a non-operational state of the combustor cascade system. A step of inputting an operation command to at least one combustor unit among the units; b) a step of supplying a preset gas supply amount to the combustor unit to which the operation command is input and attempting ignition; c) whether ignition is successful and determining, when the ignition success is determined in step c), d) maintaining the combustion state of the combustion device unit by setting the gas supply amount at the time of successful ignition as the minimum gas supply amount that is the lowest limit value of the gas supply amount. and, when determining non-ignition in step c), e) increasing the gas supply amount of the gas supplied to the combustion device unit to attempt ignition and at the same time determining whether ignition is successful, the step e) includes a plurality of times in which ignition is attempted again, and in the plurality of times, a constant gas supply amount of gas is supplied for each period and ignition is attempted again, but the gas supply amount in the following period is a certain amount than the gas supply amount in the preceding period It is configured in such a way as to increase by the amount, and when ignition is successful, the progress of the plurality of times is stopped and the step d) is performed, and the total amount of the ignition attempt time, which is the execution time for performing the step e), is a preset maximum limit If the maximum ignition attempt time, which is a value, is exceeded, operation of the ignition device and gas supply are stopped and an error is processed.

In addition, when the combustion state is released due to misfire of the flame inside the combustion chamber during operation of the combustion device unit, step e) may be performed.

In addition, when the flame inside the combustion chamber is misfired and the combustion state is released, the gas supply amount at the time of misfire is set as the misfire gas supply amount, and step e) includes a step of supplying more than the misfire gas supply amount to perform ignition. can

In addition, when the flame inside the combustion chamber is misfired and the combustion state is released, a post-purge step of evacuating the gas inside the combustion chamber for a predetermined time may be performed prior to performing step e).

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In addition, it may be configured to adjust the gas supply amount by adjusting the rotational speed of the blower that sucks the gas and introduces it into the combustion device unit.

In addition, the control unit may be configured to receive the detection information of the flame detector for detecting the presence or absence of a flame inside the combustion chamber to determine whether the ignition is successful or whether the misfire.

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The combustor cascade system comprising a plurality of combustor units according to the present invention attempts to ignite by supplying gas at a preset gas supply amount to the combustor unit, but when determining non-ignition, the timing of following until ignition success Attempt to ignite again through a plurality of periods configured in such a way that the gas supply amount is increased by a certain amount than the gas supply amount of the preceding period, and when the ignition success is determined, the progress of the plurality of periods is stopped and the gas supply amount at the time of ignition success is set to the minimum gas It maintains the combustion state as the supply amount, and when the total amount of ignition attempt time exceeds the maximum ignition attempt time, which is a preset maximum limit, a control unit for controlling the operation of the ignition device and gas supply to stop and error processing is included.

In addition, when the flame inside the combustion chamber is misfired and the combustion state is released during operation of the combustion device, the control unit may increase the gas supply amount of the supplied gas to attempt ignition again in the combustion chamber.

In addition, when the ignition success is determined, the minimum gas supply amount preset in the control unit may be updated to the gas supply amount when the ignition is successful.

In addition, the control unit may be configured to perform a post-purge step of evacuating the gas inside the combustion chamber for a predetermined time prior to attempting ignition again after a misfire occurs.

According to the combustion apparatus and the combustion control method of the combustion apparatus according to the present invention, the gas supply amount is adjusted during an ignition attempt to automatically satisfy the gas supply amount required for ignition, thereby stably igniting and stably providing heating or hot water.

In addition, until ignition is successful, the gas supply is gradually increased and the ignition is attempted to check the minimum gas supply for combustion. Alternatively, hot water may be provided.

In addition, it is possible to automatically re-ignite in case of misfire to maintain the combustion state of the combustion device and provide stable heating or hot water.

In addition, by evacuating the gas inside the combustion chamber prior to re-ignition in case of misfire, it is possible to prevent an explosion from occurring in an overcrowded gas atmosphere and to ensure that re-ignition is safely performed.

In addition, it is possible to prevent an explosion from occurring in an overcrowded gas atmosphere by limiting the total amount of time to attempt ignition.

1 is a view schematically showing the configuration of a combustor cascade system according to the prior art.
2 is a flowchart illustrating a combustion control method of a combustion device according to the present invention.
3 is a graph showing a combustion control method of a combustion device according to the present invention.

Hereinafter, a combustion device and a combustion control method of the combustion device according to the present invention will be described in detail with reference to the accompanying drawings.

Here, detailed descriptions of the contents and overlapping contents described in the prior art will be omitted, and will be mainly described with respect to the newly added components of the present invention.

A combustion device (not shown) according to the present invention is a gas combustion device that provides heating or hot water by burning gas, and may be a combustor cascade system in which a plurality of combustor units are connected in parallel. .

The combustion device may be a boiler providing heating or hot water, or a water heater providing hot water.

In the combustor unit, a combustion chamber (not shown) in which gas is burned, a gas supply line (not shown) for supplying gas to the combustor unit, and an air supply line (not shown) for supplying air to the combustor unit and a blower (not shown) provided with a gas discharge line (not shown) for discharging the gas inside the combustion chamber, and supplying a mixture of gas and air supplied through the gas supply line and the air supply line to the combustion chamber; , a burner (not shown) for generating a flame by burning the mixer is provided.

In addition, the burner is provided with an igniter (not shown) for igniting a flame to the supplied gas.

The igniter may be configured to generate a spark by applying a high voltage to the tip of the electrode.

In addition, the combustion device is provided with a flame detector (not shown) for detecting the flame inside the combustion chamber.

The flame detector may include an optical sensor that detects light generated from a flame inside the combustion chamber through a flame detection window provided on a wall surrounding the combustion chamber, and regardless of the stage of the combustion control method to be described later, the flame inside the combustion chamber It can be made to continuously detect the presence or absence and combustion state.

The igniter, the blower and the flame detector are connected to a control unit of the combustor unit.

The control unit is configured to receive the detection information of the flame detector, determine whether there is a flame inside the combustion chamber, and control the operation of the igniter and the blower to control the combustion state of the combustion device unit.

The control of the combustion state of the controller aims to efficiently provide heating or hot water at a temperature set by a user.

The control unit adjusts the rotational speed (RPM) of the blower to adjust the gas supply amount, which is the amount of gas per hour introduced into the combustion chamber, and the gas supply amount is proportional to the rotational speed (RPM) of the blower.

A maximum gas supply amount that is the highest limit value of the gas supply amount and a minimum gas supply amount that is the lowest limit value may be set in the control unit, and the maximum rotation speed that is the rotation speed (RPM) of the blower for supplying the gas of the maximum gas supply amount (Vmax) and the minimum rotational speed (Vmin) which is the rotational speed (RPM) of the blower for supplying the gas of the minimum gas supply amount may be set.

A combustion control method of a combustion device according to the present invention will be described with reference to FIGS. 2 and 3 .

2 is a flowchart illustrating a combustion control method of a combustion device according to the present invention, and FIG. 3 is a graph showing a change in rotational speed (RPM) of the blower controlled by the present invention.

The present invention relates to some of the combustor units that were in a non-operational state while some of the combustor units among a plurality of combustor units constituting the combustor cascade system are in operation, and in the description to be described later, the combustor unit' denotes any one of the 'remaining partial combustor units in non-operational state'.

Step S10 is a step in which ignition is attempted as the combustor unit is operated.

When the operation command of the combustion device unit is input, the control unit of the combustion device operates a blower to introduce gas and air into the combustion device unit from the gas supply line and the air supply line, and operates an igniter to cause a flame to enter the combustion chamber. try to ignite

At this time, the gas flowing into the combustion device unit is supplied at a preset minimum gas supply amount (Tmin), and for this purpose, the blower is operated at a preset minimum rotational speed (Vmin).

The ignition attempt of the igniter may be made at least once during a predetermined time T0, and the predetermined time T0 may be preset in the control unit in consideration of the time required for a sufficient amount of gas to reach the igniter. have.

Step S20 is a step in which the control unit determines whether the combustion chamber is ignited, and this step S20 is performed in parallel while the step S10 is performed.

The control unit receives the detection information of the flame detector to determine whether to ignite, performs step S30 to be described later when determining non-ignition, and performs step S60 to be described later when determining successful ignition.

Step S30 is a step of retrying ignition.

The control unit is configured to increase the gas supply amount by increasing the rotational speed (RPM) of the blower until ignition is achieved.

To this end, this step S30 may consist of a primary period R1 in which the rotational speed (RPM) of the blower is maintained constant at the first rotational speed (V1) for a first holding time (T1) that is a predetermined time. .

The first period (R1) is a period in which ignition is attempted secondarily in this step S30 after the initial ignition attempt, and the first rotation speed (V1) may be made to have a value greater than or equal to the minimum rotation speed (Vmin), , an ignition rotation speed increase amount G0 that is a difference value between the minimum rotation speed Vmin and the first rotation speed V1 may be set in the control unit.

After the ignition is attempted in the state in which the rotational speed (RPM) of the blower is increased as described above, the process proceeds to step S40.

Step S40 is a step in which the control unit determines whether the inside of the combustion chamber is ignited, which is the same as step S20, but this step S40 is performed in parallel while the step S30 is performed.

The controller receives the detection information of the flame detector while the first time R1 is in progress and determines whether to ignite.

The control unit performs step S50 when ignition is successful, and performs step S100 when ignition is not ignited.

In step S100, it is determined whether the maximum ignition attempt time has been exceeded. The maximum ignition attempt time (Tmax) means the maximum limit value of the time during which the gas is supplied in a state in which ignition is not performed by performing steps S30 and S40. As a result of the determination, if the ignition attempt time does not exceed the maximum ignition attempt time, the process proceeds to step S30 again.

Thereafter, the process described in S30 is repeated, and at least once in the secondary period R2 in which the rotational speed (RPM) of the blower is maintained for the second holding time (T2) at the second rotational speed (V2). Ignition attempt is made. In this case, the second rotation speed V2 has a value increased by the first increase amount G1 from the first rotation speed V1. After that, as a result of determining whether to ignite in S40, after the ignition fails again, the process of step S30 is repeated through step S100.

In addition, when ignition fails in the second time (R2), the rotation speed (RPM) of the blower is increased from the second rotation speed (V2) to the third rotation speed (V3) having a value increased by the second increase amount (G2). At least one ignition attempt is made in the third period R3 maintained for the third holding time T3.

A rotation speed increase amount between the plurality of times R1, R2, R3 including the first increase amount G1 and the second increase amount G2 may be set in the control unit, and the rotation speed increase amount of the blower G0, G1 and G2) may be set to the same value.

That is, according to the present invention, when ignition is not ignited, the gas supply amount is automatically adjusted to attempt ignition again, thereby stably igniting and heating or hot water can be stably provided.

Also, increase the gas supply until ignition is successful and try to ignite the ignition with the minimum gas supply for ignition and combustion, thereby reducing unnecessary gas waste and checking the minimum gas supply for ignition and combustion. can

In addition, the control unit may set a maximum ignition attempt time (Tmax), which is the highest limit value of the time during which the ignition attempt is performed.

The control unit, in parallel with the step S30 and this step S40, may determine whether the maximum ignition attempt time Tmax is exceeded (step S100), and the holding time of the plurality of times (R1, R2, R3) If ignition is not made so that the total amount of execution time of step S30 including (T1, T2, T3) exceeds the maximum ignition attempt time (Tmax), stop the operation of the igniter and the blower and process an error ( step S110).

The maximum ignition attempt time (Tmax) is to prevent a state in which the gas density inside the combustion chamber is excessively increased due to a situation such as ignition delay, and to prevent an explosion from occurring in an overcrowded gas atmosphere.

Step S50 is a step in which ignition is made in the combustion chamber, and the minimum gas supply amount set in the control unit is updated to the gas supply amount when ignition is successful (600).

At this time, since the control unit controls the blower to adjust the gas supply amount, in this step S50, the minimum rotation speed (Vmin) set in the control unit is updated to the rotation speed (RPM) of the blower when ignition is successful (600) It may be a step

For example, when ignition is performed during the third period R3 of step S30, the rotation speed (RPM) of the blower at the time of successful ignition (600) becomes the third rotation speed (V3), The value of the minimum rotation speed Vmin set in the control unit is updated to the value of the third rotation speed V3.

That is, according to the present invention, it is possible to check the minimum gas supply amount for combustion by gradually increasing the gas supply amount until the ignition is successful (600) and attempting ignition (step 40), and the gas at the successful ignition (600) By setting the supply amount to the minimum gas supply amount, combustion can be maintained by consuming the minimum amount of gas without unnecessary waste.

Accordingly, it is possible to provide efficient heating or hot water by maximally increasing the turn-down ratio (TDR) within a range capable of maintaining the combustion state of the combustion device unit in which the combustion gas is reversed.

Step S60 is a step of maintaining the combustion state to correspond to the heating load or the hot water load currently required. That is, when heating or hot water is used, the combustion device may be turned ON/OFF according to the set temperature.

At this time, the gas supply amount to correspond to the heating load or the hot water load is maintained between the minimum gas supply amount and the maximum gas supply amount or less, and for this, the rotation speed (RPM) of the blower is the minimum rotation speed (Vmin) and the maximum rotation between the speeds Vmax.

In addition, when the rotational speed (RPM) of the blower becomes smaller than the minimum rotational speed (Vmin), a misfire may occur and the combustion state inside the combustion chamber may be released, so that the rotational speed (RPM) of the blower is the minimum rotational speed (Vmin) or more is controlled.

That is, the control unit can prevent unnecessary gas consumption and increase the thermal efficiency of the combustion device by controlling the gas to be burned with the minimum thermal power required for maintaining the target temperature and maintaining the combustion state inside the combustion chamber.

Step S70 is a step in which the control unit determines whether the inside of the combustion chamber is misfired, and this step S70 is performed in parallel while the step S60 is performed.

The control unit receives the detection information of the flame detector, determines whether the flame inside the combustion chamber is misfired, and when misfire occurs (700), performs step S80 to be described later.

At this time, the gas supply amount at the time of the misfire 700 is referred to as the misfire gas supply amount, and the rotation speed (RPM) of the blower at the time of the misfire 700 is stored as a misfire rotation speed (Voff) or misfire gas supply amount in the control unit. .

Step S80 is a post-purge step of discharging the gas inside the combustion chamber.

The post-purge step is to prevent a state in which additional gas is supplied to the inside of the combustion chamber in which the combustion state is released due to misfire occurs and the gas density inside the combustion chamber is excessively increased, and before the re-ignition attempt to be described later This is a step for preventing an explosion from occurring in an overcrowded gas atmosphere by performing the purge step.

To this end, the control unit operates the blower to push the combustion gas inside the combustion chamber and discharge it to the gas discharge line.

At this time, the control unit may control the valve for opening and closing the gas supply line to close the gas supply line and operate the blower in a state where only the air supply line is opened, and accordingly, the air supplied into the combustion chamber is converted into combustion gas. It can be made to purge by pushing out.

At this time, the blower maintains the post-purge rotation speed (Vp) to supply air at a constant post-purge air supply amount, and is configured to operate during the post-purge holding time (Tp), so that the purge can be performed stably.

The post purge holding time (Tp) and the post purge rotation speed (Vp) may be preset in the control unit, and the post purge holding time (Tp) may be set to 10 to 20 seconds, and the post purge rotation speed (Vp) may be set in advance. The speed Vp may be set to a value smaller than the minimum rotation speed Vmin.

Step S90 is a step of determining whether to stop the operation of the combustion device by determining the cause of the occurrence of the misfire.

The control unit may be configured to stop the operation of the combustion device when the occurrence of the misfire is in accordance with the user's end command or the determination of the end of the control unit due to other causes.

In addition, when the occurrence of the misfire is not in accordance with a user's end command or an end determination of the control unit, the control unit repeats the combustion control method of step S30 or less.

That is, according to the present invention, the combustion state of the combustion chamber is maintained and the provision of heating or hot water is stably maintained by automatically re-igniting when a misfire occurs.

The re-ignition attempt may be performed immediately after the post-purge step of step S80 is completed, or may be performed at a predetermined time interval.

At this time, in the step S30 of attempting re-ignition when a misfire occurs, the first rotation speed V1 ′ of the first time R1 ′ for attempting re-ignition is configured to have a value greater than or equal to the misfire rotation speed Voff. can

To this end, a re-ignition rotation speed increase amount G0', which is a difference between the misfire rotation speed Voff and the first rotation speed V1', may be set in the control unit, and the first rotation speed V1' ) is a value obtained by adding the ignition rotation speed increase amount G0' to the misfire rotation speed Voff.

In addition, upon successful re-ignition (800), in step S50, the minimum rotation speed Vmin is updated to a value greater than or equal to the misfire rotation speed Voff.

For example, when the re-ignition is made in the second time R2 ′ in which re-ignition is attempted, the rotation speed V of the blower at the time of successful re-ignition 800 is determined from the first rotation speed V1 ′. It is the second rotation speed V2' increased by the third increase amount G3, and since the minimum rotation speed Vmin is updated with the value of the second rotation speed V2', the minimum rotation speed is the actual rotation speed ( Voff) is updated to a value obtained by adding the re-ignition rotational speed increase amount G0' and the third increase amount G3.

That is, according to the present invention, re-ignition is automatically performed when a misfire occurs, but the gas supply amount at the time of successful re-ignition (800) is set to the minimum gas supply amount to consume a minimum amount of gas without unnecessary waste to maintain combustion. It is possible to provide efficient heating or hot water by maximizing the turn-down ratio (TDR) within the range that can maintain the combustion state of the unit.

As described above, according to the combustion apparatus and the combustion control method of the combustion apparatus according to the present invention, the gas supply amount is adjusted during an ignition attempt to automatically satisfy the gas supply amount required for ignition, thereby stably igniting and stably providing heating or hot water. can do.

In addition, when ignition is successful (600,800), the gas supply is gradually increased, and the ignition is attempted to check the minimum gas supply for combustion. Efficient heating or hot water can be provided by maximizing the

In addition, it is possible to automatically re-ignite in case of misfire to maintain the combustion state of the combustion device and provide stable heating or hot water.

In addition, by evacuating the gas inside the combustion chamber prior to re-ignition in case of misfire, it is possible to prevent an explosion from occurring in an overcrowded gas atmosphere and to ensure that re-ignition is safely performed.

In addition, it is possible to prevent an explosion from occurring in an overcrowded gas atmosphere by limiting the total amount of time to attempt ignition.

The present invention is not limited to the above-described embodiments, and obvious modifications can be made by those of ordinary skill in the art to which the invention pertains without departing from the technical spirit of the invention as claimed in the claims. The practice is within the scope of the present invention.

R1: 1st period R2: 2nd period
R3: 3rd period T1: 1st holding time
T2: 2nd holding time T3: 3rd holding time
Tmax: Maximum ignition attempt time Tp: Post purge holding time
V1: 1st rotation speed V2: 2nd rotation speed
V3: 3rd rotation speed Vmax: Maximum rotation speed
Vmin: Minimum rotation speed Voff: Misfire rotation speed
Vp: Post purge rotation speed 600: Upon successful ignition
700: In case of misfire 800: In case of successful re-ignition

Claims (12)

a) in the combustor cascade system in which only some of the plurality of combustor units are in an operating state, the step of inputting an operation command to at least one combustor unit among the remaining partial combustor units that are not in operation;
b) a step of supplying a preset amount of gas to the combustion device unit to which an operation command is input, and attempting ignition;
c) determining whether ignition is successful; including,
maintaining the combustion state of the combustion device unit by setting the gas supply amount at the time of successful ignition as the minimum gas supply amount that is the lowest limit value of the gas supply amount when the ignition success is determined in step c); do,
When determining non-ignition in step c), e) increasing the gas supply amount of the gas supplied to the combustion device unit to attempt ignition to determine whether ignition is successful;
The step e) includes a plurality of times when ignition is attempted again, and the plurality of times is a period in which a gas supply amount of a constant gas supply is supplied for each period and ignition is attempted again, but the gas supply amount of the subsequent period precedes the period It is configured in such a way that it is increased by a certain amount than the gas supply amount, and when ignition is successful, the progress of the plurality of times is stopped and the step d) is performed,
When the total amount of the ignition attempt time, which is the execution time for performing the step e), exceeds the maximum ignition attempt time, which is a preset maximum limit value, the ignition control method is configured to stop the operation of the ignition device and the gas supply and process an error. . According to claim 1,
Combustion control method of a combustion device, characterized in that performing the step e) when the combustion state is canceled due to the flame inside the combustion chamber being misfired during operation of the combustion device unit. 3. The method of claim 2,
when the flame inside the combustion chamber is misfired and the combustion state is canceled, the gas supply amount at the time of misfire is set as the misfired gas supply amount;
The step e) is a combustion control method of a combustion device, characterized in that the ignition is performed by supplying a gas equal to or greater than the supply amount of the misfired gas. 3. The method of claim 2,
When the flame inside the combustion chamber is misfired and the combustion state is released, a post-purge step of evacuating the gas inside the combustion chamber for a predetermined time is performed prior to performing step e). delete According to claim 1,
A combustion control method of a combustion device, characterized in that the gas supply amount is adjusted by adjusting the rotational speed of a blower that sucks gas and introduces the gas into the combustion device unit. According to claim 1,
Combustion control method of a combustion device, characterized in that the control unit receives the detection information of the flame detector that detects the presence or absence of a flame inside the combustion chamber, and determines whether the ignition is successful or misfire. delete In the combustor cascade system in which only some combustor units among a plurality of combustor units are in an operating state and some combustor units are in an inoperative state, at least one combustor unit among the non-operational combustor units is operated When a command is entered,
Attempt to ignite by supplying gas at a preset gas supply amount to the combustion device unit,
At the time of determination of non-ignition, the ignition is attempted again through a plurality of periods configured in such a way that the gas supply amount of the succeeding period is increased by a certain amount than the gas supply amount of the preceding period until the ignition is successful,
When the ignition success is determined, the progress of the plurality of times is stopped and the combustion state is maintained by setting the gas supply amount when the ignition is successful as the minimum gas supply amount,
A combustion device comprising: a control unit for controlling to stop operation and gas supply of the igniter and process an error when the total amount of ignition attempt time exceeds the maximum ignition attempt time, which is a preset maximum limit value. 10. The method of claim 9,
Combustion device, characterized in that when the flame inside the combustion chamber is misfired and the combustion state is released during operation of the combustion device, the controller increases the gas supply amount of the supplied gas to attempt ignition again in the combustion chamber. 10. The method of claim 9,
When ignition success is determined, the minimum gas supply amount preset in the control unit is updated to the gas supply amount when ignition is successful. 11. The method of claim 10,
The control unit is configured to perform a post-purge step of evacuating the gas inside the combustion chamber for a predetermined time prior to attempting ignition again after a misfire occurs.

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