KR102291755B1 - Apparatus for indicating the combustion state of a boiler and a method therefor - Google Patents

Abstract

A device is provided for indicating the combustion state of the boiler. The device includes a first layer, which is an area for classifying a threshold of a target value according to combustion optimization control, on a status graph displaying the status of a combustion control factor whose status changes according to boiler combustion, and a first layer overlapping the first layer and the combustion control A region setting unit for setting a second layer, which is a region that distinguishes a state before combustion optimization of a factor and a state after combustion optimization, and a pre-optimal state indicator indicating the state of the combustion control factor before the combustion optimization according to a percentage, , a pre-optimal state display unit for displaying the generated pre-optimal state indicator on the state graph, and a post-optimal state indicator indicating the state of the combustion control factor after the combustion optimization according to a percentage, and the generated post-optimal state indicator and a post-optimal state display unit for displaying on the state graph.

Description

Apparatus for indicating the combustion state of a boiler and a method therefor

The present invention relates to a technology for displaying a combustion state of a boiler, and more particularly, to an apparatus for displaying the state before (As is) and after (To be) optimization of combustion of a boiler and a method therefor.

When performing combustion optimization of a coal-fired power plant boiler, the performed value should be displayed to the user on the screen. Generally, each value is expressed as a bar or numeric value. It is rather difficult for us to see the values before (As is) and after (To be) optimization.

Registered Korean Patent No. 1794325 on October 31, 2017 (Name: Pulverized Coal Supply and Control Device for Optimal Combustion of Power Plant Boilers)

It is an object of the present invention to provide an apparatus and a method for displaying a combustion state that can confirm the state before and after optimization.

According to an embodiment of the present invention, there is provided a device for indicating the combustion state of a boiler. The device includes a first layer, which is an area for classifying a threshold of a target value according to combustion optimization control, on a status graph displaying the status of a combustion control factor whose status changes according to boiler combustion, and a first layer overlapping the first layer and the combustion control A region setting unit for setting a second layer, which is a region that distinguishes a state before combustion optimization of a factor and a state after combustion optimization, and a pre-optimal state indicator indicating the state of the combustion control factor before the combustion optimization according to a percentage, , a pre-optimal state display unit for displaying the generated pre-optimal state indicator on the state graph, and a post-optimal state indicator indicating the state of the combustion control factor after the combustion optimization according to a percentage, and the generated post-optimal state indicator and a post-optimal state display unit for displaying on the state graph.

Here, the first layer includes an optimization region indicating that the state of the combustion control factor is optimal, and is formed extending from the optimization region and is separated from the optimization region by a boundary line to indicate that the state of the combustion control factor is not optimal. Includes non-optimized regions.

The second layer includes one or more factor regions for discriminating the assigned combustion control factors, and the factor domain includes a pre-optimal state region indicating before the combustion optimization and a post-optimal state region indicating after the combustion optimization.

The pre-optimal state display unit displays the area of the pre-optimal indicator to increase from the optimized region in the optimal state region to the non-optimized region in proportion to the percentage of the combustion control factor before the combustion optimization. do.

The post-optimum state display unit displays the area of the post-optimal state indicator to increase from the optimized region in the post-optimal state region to the non-optimized region in proportion to the percentage of the combustion control factor after the combustion optimization. do.

The non-optimized area is characterized in that it is further divided into a plurality of areas to display various states of the combustion control factor based on characteristics according to the type of the combustion control factor.

The apparatus further includes a change rate display unit for displaying a change rate indicating a change in a percentage of the measured value of the combustion control factor after combustion optimization compared to before combustion optimization.

Further, according to another embodiment of the present invention, there is provided a method for indicating the combustion state of a boiler. The method is based on the reference set value, which is a value set by the state calculation unit as the target value of combustion optimization, and the reference percentage, which is the percentage occupied by the optimization area, which is an area indicating that the state of the combustion control factor is optimal on the state graph, before combustion optimization. Calculating the pre-optimal and post-optimal percentages by converting the pre-optimal measured value, which is a measured value of the state of setting a first layer including an optimization region and a non-optimization region for the graph, and at least one factor region including a pre-optimal state region and a post-optimal state region, and overlapping the first layer; , displaying the pre-optimal state indicator generated according to the pre-optimal percentage by the pre-optimal state display unit in the pre-optimal state region, and the post-optimal state indicator generated according to the post-optimal percentage by the post-optimal state indicator as the optimum and displaying it in the post-state area.

In the calculating step, the pre-optimal percentage and the post-optimal percentage are calculated according to Equations A2 = A1 X S2 ÷ S1 and Equations B2 = B1 X S2 ÷ S1, wherein S1 is a reference value set as a combustion optimization target value is a set value, S2 is a reference percentage that is a percentage occupied by an optimization area that is an area indicating that the state of the combustion control factor is in an optimized state on the state graph, A1 is the pre-optimal measurement value, and A2 is before the combustion optimization It is a percentage before and after the optimal state of the measured value of the combustion control factor expressed as a percentage, B1 is the post-optimal measured value, and B2 is the measured value of the state of the combustion control factor after combustion optimization as a percentage before and after optimal It is characterized as a percentage.

The optimization region indicates that the state of the combustion control factor is optimal, and the non-optimization region is formed extending from the optimization region and is separated from the optimization region by a boundary line to indicate that the state of the combustion control factor is not optimal, The factor region distinguishes other combustion control factors from the assigned combustion control factors in response to the assigned combustion control factors, and the factor domain includes a pre-optimal state region indicating before the combustion optimization and a post-optimal state indicating after the combustion optimization. It is characterized in that it includes an area.

The pre-optimal state region includes the optimized region and the non-optimized region as the first layer and the second layer overlap each other, and the step of displaying the optimal state indicator on the optimal pre-state region includes The state display unit may display the pre-optimal state indicator so that an area increases from the optimized area to the non-optimized area in proportion to the pre-optimal percentage.

The post-optimum state region includes the optimized region and the non-optimized region as the first layer and the second layer overlap each other, and the step of displaying the post-optimal state indicator in the post-optimal state region includes the post-optimization region. The status display unit may display the post-optimal status indicator so that an area increases from the optimized area to the non-optimized area in proportion to the post-optimal percentage.

According to an embodiment of the present invention, the improved state according to the optimized combustion can be intuitively confirmed by displaying the state before and after the optimization at once.

1 is a block diagram for explaining the configuration of an apparatus for displaying a combustion state of a boiler according to an embodiment of the present invention.
2 to 7 are screen examples for displaying the combustion state of the boiler according to an embodiment of the present invention.
8 is an example of a screen displaying a combustion state of a boiler according to another embodiment of the present invention.
9 is an example of a screen displaying a combustion state of a boiler according to another embodiment of the present invention.
10 is a flowchart for explaining a method for displaying a combustion state of a boiler according to an embodiment of the present invention.
11 is a diagram illustrating a computing device according to an embodiment of the present invention.

Since the present invention can apply various transformations and can have various embodiments, specific embodiments are illustrated and described in detail in the detailed description. However, this is not intended to limit the present invention to specific embodiments, and it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention.

The terms used in the present invention are only used to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present invention, terms such as 'comprising' or 'having' are intended to designate that the features, numbers, steps, operations, components, parts, or combinations thereof described in the specification exist, but one or more other features It should be understood that this does not preclude the existence or addition of numbers, steps, operations, components, parts, or combinations thereof.

First, an apparatus for displaying the combustion state of a boiler according to an embodiment of the present invention will be described. 1 is a block diagram for explaining the configuration of an apparatus for displaying a combustion state of a boiler according to an embodiment of the present invention. 2 to 7 are screen examples of a state graph displaying the combustion state of the boiler according to an embodiment of the present invention. 8 is a screen example of a state graph displaying the combustion state of the boiler according to another embodiment of the present invention. 9 is a screen example of a state graph displaying the combustion state of the boiler according to another embodiment of the present invention.

Referring to Figure 1, the device (10, hereinafter, abbreviated as 'status display device') for displaying the combustion state of a boiler according to an embodiment of the present invention includes a plant controller 1, a state calculator 100, It includes a region setting unit 200 , a pre-optimal state display unit 300 , a post-optimal state display unit 400 , and a change rate display unit 500 .

The plant controller 1 is for overall control of the plant including the boiler. The plant controller 1 may continuously collect measured values for various factors of the boiler through various sensors and the like. In addition, combustion optimization for the boiler can be performed through user control or program control.

When the combustion optimization control is started, the state calculating unit 100 measures the state of the combustion control factor after the combustion optimization and the pre-optimal measurement value, which is the value measured before the combustion optimization from the plant controller 1 It is possible to receive an input of a post-optimal measurement value, which is a value, and a reference set value, which is a value set as a combustion optimization target value. Then, the state calculator 100 converts the pre-optimal measured value, the post-optimal measured value, and the reference set value into percentages to generate the pre-optimal percentage, the post-optimal percentage, and the reference percentage. At this time, the state calculating unit 100 determines the percentage occupied by the optimization region OZ in the first layer L1 of the state graph SC as a reference percentage. The percentage occupied by the optimization region OZ in the first layer L1 may be preset or set according to a user input. Then, the state calculating unit 100 represents the pre-optimal measured value and the post-optimal measured value as the pre-optimal percentage and the post-optimal percentage based on the reference set value and the reference percentage according to Equation 1 below.

Here, S1 is a reference set value that is a value set as a combustion optimization target value, and S2 is a reference percentage that is a percentage occupied by the optimization region OZ in the first layer L1. In addition, A1 is a pre-optimal measurement value that is a value measured before combustion optimization, and A2 is an optimal total percentage expressed as a percentage of a value measured before combustion optimization. And B1 is the post-optimal measured value, which is a value measured for the state of the combustion control factor after combustion optimization, and B2 is the post-optimal percentage indicating the measured value of the state of the combustion control factor after combustion optimization as a percentage.

In addition, the state calculating unit 100 calculates a change rate representing the change in the combustion control factor after combustion optimization as a percentage, compared to before combustion optimization, according to Equation 2 below.

Here, X means a conversion rate. In addition, A1 is a pre-optimal measured value, and B1 is a post-optimal measured value. And A2 is the pre-optimal percentage, and B2 is the post-optimal percentage.

Then, an example of calculating the above-described reference percentage, pre-optimal percentage, post-optimal percentage and change rate will be described.

As an example, it is assumed that the reference set values (S1), pre-optimal measured values (A1), and post-optimal measured values (B1) of the combustion control factors temperature, NOx, CO and O2, respectively, are as shown in Table 1 below.

Combustion Control Factor (ITEM) Pre-optimal measured value (A1) reference set value
(S1) Post-optimal measurement
(B1) rate of change
(X) Temperature 120 ºC 50 ºC 40 ºC -66.7% NOx 560 MG/NM3 200 MG/NM3 170 MG/NM3 - 69.6% CO 60 MG/NM3 80 MG/NM3 70 MG/NM3 +16.7% O2 5% 3% 2.5% -2.5%p

In this case, it is assumed that the percentage occupied by the optimization region OZ in the first layer L1 in the state graph SC is 40%. Then, the state calculating unit 100 sets all the reference percentages to 40% as shown in Table 2 below, and then, based on the reference set value (Table 1) and the reference percentage (40%), according to Equation 1, As shown in Table 2, the pre-optimal percentage (A2) and the post-optimal percentage (B2) are calculated from the pre-optimal measured value (A1) and the post-optimal measured value (B1).

combustion control factor
(ITEM) Optimal whole percentage
(A2) Base percentage
(S2) After Optimal Percentage
(B2) rate of change
(X) Temperature 96.0% 40% 32% -66.7% NOx 99.0% (limited from 112%) 40% 34% - 69.6% CO 30.0% 40% 35.0% +16.7% O2 66.7% 40% 33.3% -2.5%p

Here, according to Equation 1, in the case of the optimal total percentage (A2) of NOx in Table 2, A2 = A1 (560 MG/NM3) × S2 (40%) ÷ S1 (200 MG/NM3) = 112%. As such, when the optimal whole percentage (A2) exceeds 99%, it is limited and the optimal total percentage (A2) is set to 99%.

Then, the state calculating unit 100 also calculates the change in the measured value of the combustion control factor after combustion optimization compared to before combustion optimization as shown in Table 1 or Table 2 according to Equation 2 according to Equation 2 as a percentage. The indicated rate of change (X) is calculated.

The region setting unit 200 displays a state graph (SC) for displaying a state of a factor whose state changes according to boiler combustion, that is, a state of a combustion control factor, according to the information indicated by the region in a plurality of layers and a plurality of layers. Set by dividing the area. For example, the combustion control factor may include temperature, NOx, CO, O2, and the like. The area setting unit 200 receives a display target combustion control factor to be displayed as a state graph (SC) from the plant controller 1 and displays a state of the corresponding combustion control factor (SC: state chart) is divided into a plurality of hierarchies and a plurality of regions according to information indicated by the corresponding region and is set.

According to an embodiment, the region setting unit 200 may set the state graph SC by dividing it into a first layer L1 and a second layer L2. Here, the first layer L1 and the second layer L2 are displayed to be overlapped. Here, the first layer L1 is an area for classifying the threshold of the target value according to the combustion optimization control, and the second layer L2 is an area for classifying the state before and after the combustion optimization of the combustion control factor.

The first layer L1 is illustrated in FIG. 2 . The region setting unit 200 may divide the first layer L1 into an optimized region OZ and a non-optimized region EZ. In this case, the region setting unit 200 determines the area occupied by the optimization region OZ in the first layer L1 according to the reference percentage. As shown, the optimization region OZ is formed at the center of the circle, and the non-optimization region EZ is formed to surround the optimization region OZ and extend from the optimization region OZ. The optimization region OZ and the non-optimization region EZ are separated by a boundary line OL. The boundary line OL may be a criterion for judging whether the state of combustion control factors such as temperature, NOx, CO, and O2 is an optimal state. Accordingly, based on the boundary line OL, the optimization region OZ indicates that the combustion control factor is in an optimized state, and the non-optimized region EZ indicates that the combustion control factor is not in an optimized state. As such, the region setting unit 200 may divide and allocate the optimized region OZ and the non-optimized region EZ based on the boundary line OL on the first layer L1. Accordingly, the region setting unit 200 may set the position of the boundary line OL according to the target value of optimization.

The second layer L2 is illustrated in FIG. 3 . The second layer (L2) includes one or more factor regions (M: M1, M2, M3, M4) for classifying the assigned combustion control factors. That is, any one factor area (any one of M1, M2, M3, and M4) is allocated to any one of combustion control factors such as temperature, NOx, CO, and O2. In particular, the factor regions (M: M1, M2, M3, M4) include the pre-optimal state region (F: F1, F2, F3, F4) indicating before combustion optimization and the post-optimal state region (N: N1, N2, N3, N4).

In the embodiment of the present invention, the combustion control factor temperature, NOx, CO, and O2 will be described as an example, but the combustion control factor is not limited thereto, and all factors subject to control for optimized combustion are included in the combustion control factor. can For example, combustion control factors include Sox, UBC (Un-Burned Carbon), Boiler Heat Rate, Boiler Efficiency, Power Station Internal Load, Plant Efficiency, and Dust. dust) degree, amount of ash, RH spray usage (spray used to cool the reheater steam), property value of fuel used (C value, H value, N value, O value, S value, Ash value, moisture, etc.) may be further included.

The region setting unit 200 sets one or more factor regions (M: M1, M2, M3, M4) for classifying the combustion control factors allocated to the second layer (L2). At this time, when there are a plurality of combustion control factors to be allocated, an equal area is allocated to each combustion control factor. For example, as shown in FIG. 3 , when displaying four combustion control factors, the area setting unit 200 includes four printing areas (M: M1, M2, M3, M4) corresponding to the four combustion control factors. Allocate it evenly. In this case, the region setting unit 200 equally allocates the shapes and areas of the four print regions M: M1, M2, M3, and M4.

In addition, the region setting unit 200 equally divides the shape and area of each of the printing regions (M: M1, M2, M3, M4) to obtain the pre-optimal state region (F: F1, F2, F3, F4) and the post-optimal state region (F: F1, F2, F3, F4). It is divided into state areas (N: N1, N2, N3, N4). The pre-optimal state regions F: F1, F2, F3, and F4 are regions for indicating the state before combustion optimization of the combustion control factor. In addition, the pre-optimal state regions N: N1, N2, N3, and N4 are regions for indicating the state before combustion optimization of the combustion control factor.

As described above, the first layer L1 and the second layer L2 set by the region setting unit 200 are overlapped and displayed, and an example of such a screen is shown in FIG. 4 . As shown, the optimization region (OZ) and non-optimization region (EZ) of the first layer and the pre-optimal state region (N: N1, N2, N3, N4) and post-optimal state region (N: N1) of the second layer , N2, N3, N4) overlapping print regions (M: M1, M2, M3, M4). According to this overlap, both the pre-optimal state region (N: N1, N2, N3, N4) and the post-optimal state region (N: N1, N2, N3, N4) include an optimized region (OZ) and a non-optimized region (EZ). do.

Referring to FIG. 5 , the pre-optimal state display unit 300 displays an optimal pre-state indicator (FV: FV1, FV2, FV: FV1, FV2, FV3, FV4) are created. The optimal state indicators FV: FV1, FV2, FV3, and FV4 have an area proportional to the optimal total percentage A2. In addition, the pre-optimal state display unit 300 displays the generated pre-optimal state indicators (FV: FV1, FV2, FV3, FV4) on the state graph SC. In this case, the pre-optimal state display unit 300 may display the pre-optimal state indicators (FV: FV1, FV2, FV3, FV4) in the pre-optimal state areas (F: F1, F2, F3, F4).

For example, in FIG. 5 , it is assumed that each of the first to fourth factor regions M: M1, M2, M3, and M4 corresponds to the combustion control factor temperature, NOx, CO, and O2. The pre-optimal state display unit 300 includes first to fourth pre-optimal state indicators (FV: FV1, FV2, FV3) having an area proportional to the optimum total percentage (A2) of each of the temperature before combustion optimization, NOx, CO and O2 , FV4). Then, the pre-optimal state display unit 300 displays the first to fourth pre-optimal state indicators FV: FV1, FV2, FV3, and FV4, respectively, in the first to fourth pre-optimal state regions F: F1, F2, F3. , F4) are indicated in each. That is, the optimal state display unit 300 generates the first optimal state indicator FV1 according to the optimal total percentage A2 of the temperature before combustion optimization, and sets the first optimal state indicator FV1 to the first optimal state. It is displayed in the full state area (F1). In addition, the optimal state display unit 300 generates a second optimal state indicator FV2 according to the optimal total percentage A2 of NOx prior to combustion optimization, and removes the generated second optimal state indicator FV2. 2 It is displayed in the optimal pre-state area (F2). In addition, the optimal state display unit 300 generates a third optimal state indicator (FV3) according to the optimal total percentage of CO before combustion optimization (A2), and removes the generated third optimal state indicator (FV3). 3 It is displayed in the optimal pre-state area (F3). And the optimal state display unit 300 generates a fourth optimal state indicator FV4 according to the optimal total percentage A2 of O2 before combustion optimization, and displays the generated fourth optimal state indicator FV4 as a fourth It is displayed in the optimal pre-state area (F4).

As the first layer and the second layer overlap, the optimal state region (F: F1, F2, F3, F4) includes an optimized region (OZ) and a non-optimized region (EZ), and the optimal state indicator (FV: FV1, FV2, FV3, FV4) are the percentage of the measured value of the combustion control factor before combustion optimization, that is, the area from the optimization zone (OZ) to the non-optimization zone (EZ) is proportional to the optimal total percentage (A2). formed to increase. Therefore, if the region occupied by the pre-optimal state indicators FV: FV1, FV2, FV3, FV4 is limited only within the optimization region OZ, it can be recognized that the state of the corresponding combustion control factor before combustion optimization is already in the optimized state. On the other hand, if the area occupied by the pre-optimal state indicator (FV: FV1, FV2, FV3, FV4) extends beyond the optimization area (OZ) to the non-optimization area (EZ), the state of the corresponding combustion control factor before combustion optimization is still It can be recognized that the state is not optimized.

Referring to FIG. 6 , the post-optimal state display unit 400 displays the post-optimal state indicators (NV: NV1, NV2, NV3, NV4). The post-optimum state indicators NV: NV1, NV2, NV3, and NV4 have an area proportional to the post-optimum percentage B2. The post-optimal state display unit 400 displays the generated post-optimal state indicators (NV: NV1, NV2, NV3, NV4) on the state graph SC. In this case, the post-optimal state display unit 400 may display the post-optimal state indicators NV: NV1, NV2, NV3, and NV4 in the post-optimal state areas N: N1, N2, N3, and N4.

For example, in FIG. 6 , it is assumed that each of the first to fourth factor regions M: M1, M2, M3, and M4 corresponds to the combustion control factor temperature, NOx, CO, and O2. The post-optimal state display unit 400 includes first to fourth post-optimal state indicators (NV: NV1, NV2, NV3) having an area proportional to the post-optimal percentage (B2) of each of the temperature after combustion optimization, NOx, CO and O2 , NV4). Then, the post-optimum state display unit 400 displays the first to fourth post-optimal state indicators NV: NV1, NV2, NV3, and NV4, respectively, in the first to fourth post-optimal state regions N: N1, N2, N3. , N4) are indicated in each. That is, the post-optimum state display unit 400 generates the first post-optimum state indicator NV1 according to the post-optimum percentage B2 of the temperature after combustion optimization, and displays it in the generated first post-optimal state region N1 . do. In addition, the post-optimum state display unit 400 generates a second post-optimal state indicator NV2 according to the post-optimal percentage B2 of NOx before combustion optimization, and removes the generated second after-optimal state indicator NV2. 2 It is displayed in the post-optimal state area (N2). And the post-optimum state display unit 400 generates a third post-optimal state indicator NV3 according to the post-optimal percentage of CO after combustion optimization (B2), and displays the generated third post-optimal state indicator NV3 as a third It is displayed in the post-optimal state area N3. In addition, the post-optimum state display unit 400 generates a fourth post-optimal state indicator NV4 according to the post-optimal percentage B2 of O2 after combustion optimization, and removes the generated fourth post-optimal state indicator NV4. 4 It is displayed in the post-optimal state area (N4).

As the first layer (L1) and the second layer (L2) overlap, the post-optimal region (N: N1, N2, N3, N4) includes an optimized region (OZ) and a non-optimized region (EZ), After-state indicator (NV: NV1, NV2, NV3, NV4) is the percentage of the measured value of the combustion control factor after combustion optimization, that is, the non-optimized area from the optimization area (OZ) in proportion to the post-optimal percentage (B2). (EZ) is formed so that the area increases. Therefore, if the area occupied by the post-optimal state indicators NV: NV1, NV2, NV3, NV4 is limited only within the optimization area OZ, it can be recognized that the corresponding combustion control factor is in the optimized state. On the other hand, if the area occupied by the post-optimal state indicator (NV: NV1, NV2, NV3, NV4) extends beyond the optimization area (OZ) to the non-optimization area (EZ), recognize that the combustion control factor is not in an optimized state. can do.

Referring to FIG. 7 , the rate of change display unit 500 displays the rate of change X calculated by the state calculator 100 on the state graph SC. As described above, the state calculating unit 100 calculates the change rate (X) representing the change in the measured value of the combustion control factor after combustion optimization as a percentage as shown in Table 1 or Table 2 before combustion optimization as described above according to Equation 2 do. Then, as shown in FIG. 7 , the change rate display unit 500 sets the rate of change (-66.7%, -69.6%, +16.7%, -2.5%) in the post-optimal state region (N: N1, N2, N3, N4). can be displayed in

Meanwhile, although it has been described that four combustion control factors are displayed on one state graph SC in the embodiment of FIGS. 2 to 7 , the present invention is not limited thereto. For example, as shown in FIG. 8 , only one combustion control factor may be displayed on one state graph SC. Moreover, there is no limit to the number of combustion control factors displayed together in one state graph SC.

In addition, although it has been described that the first layer L1 is divided into an optimized area OZ and a non-optimized area EZ in the above-described embodiments of FIGS. 2 to 7 , the present invention is not limited thereto. The optimization region OZ and the non-optimization region EZ may be divided into various regions according to the characteristics of the state in order to represent various states of the combustion control factor based on the characteristics according to the type of the combustion control factor.

For example, as shown in FIG. 8 , the optimization zone OZ and the non-optimization zone EZ are divided into a balanced zone and an unbalanced zone, or a lean zone and a comfort zone. (Comfort Zone) or may be divided into a complete zone (complete zone) and an incomplete zone (Incomplete Zone).

More clearly, the balance area is a combustion gas temperature distribution balance area, and represents a state in which the temperature distribution of the combustion gas inside the boiler is evenly formed. Contrary to the balanced region, the unbalanced region indicates a state in which the temperature distribution of the combustion gas is unevenly unbalanced. The optimum combustion state includes a state in which the distribution of combustion gases inside the boiler is evenly balanced. Accordingly, the optimization region OZ may include a state indicated by the balance region.

The lean region, more clearly expressed, indicates a state in which oxygen in the combustion gas is lean. At this time, the generation of nitrogen oxides (NOX) is also reduced. Conversely, the comfort region indicates a state in which oxygen is supplied abundantly and combustion is comfortable. In this state, a lot of oxygen in the combustion gas is measured and a lot of nitrogen oxides are also generated. Optimal combustion conditions include the oxygen-lean condition of this combustion gas. The optimization region OZ may include a state indicated by the lean region.

To be more precise, the complete region refers to a state in which combustion is complete combustion. It is also a state in which the production of carbon monoxide (CO, a gas generated during incomplete combustion) is rare. Conversely, the incomplete region represents a state in which combustion is incomplete combustion, and in this case, a relatively large amount of carbon monoxide is generated. Optimal combustion conditions include this carbon monoxide lean condition. The optimization region OZ may include a state indicated by the complete region.

And according to the above-described embodiments of FIGS. 2 to 7 , it has been described that the non-optimized region EZ is divided into only one region in the first layer L1, but the present invention is not limited thereto. The non-optimized region EZ may be further divided into a plurality of regions according to the characteristics of the state in order to represent various states of the combustion control factor based on the characteristics of the combustion control factor.

As shown in FIG. 9 , the non-optimized region EZ includes an unbalanced zone and a strong unbalanced temperature distribution zone according to various states of the combustion control factor based on the characteristics of the combustion control factor. , Comfort Zone, Excessive Emissions Zone, Incomplete Zone, Air Deficiency Zone and Excessive Air Zone. .

The strong unbalanced temperature distribution region indicates a state in which the temperature distribution of the combustion gas is more severe than the unbalanced region. In this state, if severe, the boiler control system classifies it as an emergency state, and the control can be changed to an operation for safety rather than a normal operation. The excessive emission region represents a state in which more nitrogen oxides in the combustion gas are generated than in the comfort region. In this case, normal operation is difficult, and in particular, it may adversely affect the performance of the post-treatment environmental facility at the rear stage of the boiler. The excessive air region indicates a state in which the residual oxygen in the combustion gas is relatively higher than that in the comfort region. In particular, it is the main cause of the decrease in the efficiency of the boiler. The air-deficient region refers to a state in which oxygen is scarce more than an incomplete region lacking oxygen for combustion.

Next, a method for displaying the combustion state of the boiler according to an embodiment of the present invention will be described. 10 is a flowchart for explaining a method for displaying a combustion state of a boiler according to an embodiment of the present invention.

Referring to FIG. 10 , when the combustion optimization control is started, the state calculating unit 100 determines the state of the combustion control factor before the combustion optimization from the plant controller 1 in step S110. When the post-optimal measurement value, which is a value measured the state of the combustion control factor, and the reference set value, which is the value set as the combustion optimization target value, are input, the reference percentage is set, and the pre-optimal measurement value and the optimal The post-measurement values are converted to percentages to generate percent before and after optimal. These optimal pre-percentage and post-optimal percentage are calculated according to Equation (1).

Next, the state calculating unit 100 calculates a change rate representing the change in the measured value of the combustion control factor after combustion optimization as a percentage compared to before combustion optimization in step S120 . This rate of change is calculated according to Equation (2).

Next, the region setting unit 200 divides the first layer L1 into an optimization region OZ and a non-optimization region EZ according to the reference percentage as shown in FIG. 2 in step S130 .

Then, as shown in FIG. 3 in step S140, the region setting unit 200 receives the display target combustion control factor from the plant controller 1, and according to the inputted display target combustion control factor, the second layer L2 ) to the print area (M: M1, M2, M3, M4).

Then, the region setting unit 200 equally divides the shape and area of each of the printing regions M: M1, M2, M3, and M4 as shown in FIG. : F1, F2, F3, F4) and post-optimal state region (N: N1, N2, N3, N4).

As shown in FIG. 5 in step S160, the pre-optimal state display unit 300 displays the optimal pre-state indicator (FV) according to the optimal pre-percentage ratio (A2), which represents the measured value of the state of the combustion control factor prior to combustion optimization as a percentage. : FV1, FV2, FV3, FV4) is created, and the generated pre-optimal indicator (FV: FV1, FV2, FV3, FV4) is displayed in the pre-optimal state area (F: F1, F2, F3, F4). Here, the optimal pre-state indicators FV: FV1, FV2, FV3, and FV4 have an area proportional to the optimal pre-percentage A2.

Next, as shown in FIG. 6 in step S170 , the post-optimal state display unit 400 displays the post-optimal state according to the post-optimal percentage (B2) expressed as a percentage of the measured value of the combustion control factor after combustion optimization. The indicator (NV: NV1, NV2, NV3, NV4) is created, and the generated post-optimal state indicator (NV: NV1, NV2, NV3, NV4) is placed in the post-optimal state region (N: N1, N2, N3, N4). indicate The post-optimum state indicators NV: NV1, NV2, NV3, and NV4 have an area proportional to the post-optimum percentage B2.

Next, as shown in FIG. 7 in step S180, the change rate display unit 500 shows the change rate (-66.7%, -69.6%, -69.6%, +16.7%, -2.5%) are displayed in the post-optimal state region (N: N1, N2, N3, N4).

11 is a diagram illustrating a computing device according to an embodiment of the present invention. The computing device TN100 of FIG. 11 may be a device described herein (eg, a device for displaying a combustion state of a boiler, etc.).

In the embodiment of FIG. 11 , the computing device TN100 may include at least one processor TN110 , a transceiver device TN120 , and a memory TN130 . In addition, the computing device TN100 may further include a storage device TN140 , an input interface device TN150 , an output interface device TN160 , and the like. Components included in the computing device TN100 may be connected by a bus TN170 to communicate with each other.

The processor TN110 may execute a program command stored in at least one of the memory TN130 and the storage device TN140. The processor TN110 may mean a central processing unit (CPU), a graphics processing unit (GPU), or a dedicated processor on which methods according to an embodiment of the present invention are performed. The processor TN110 may be configured to implement procedures, functions, methods, and the like described in connection with an embodiment of the present invention. The processor TN110 may control each component of the computing device TN100 .

Each of the memory TN130 and the storage device TN140 may store various information related to the operation of the processor TN110 . Each of the memory TN130 and the storage device TN140 may be configured as at least one of a volatile storage medium and a non-volatile storage medium. For example, the memory TN130 may include at least one of a read only memory (ROM) and a random access memory (RAM).

The transceiver TN120 may transmit or receive a wired signal or a wireless signal. The transceiver TN120 may be connected to a network to perform communication.

On the other hand, the various methods according to the embodiment of the present invention described above may be implemented in the form of a program readable by various computer means and recorded in a computer readable recording medium. Here, the recording medium may include a program command, a data file, a data structure, etc. alone or in combination. The program instructions recorded on the recording medium may be specially designed and configured for the present invention, or may be known and available to those skilled in the art of computer software. For example, the recording medium includes magnetic media such as hard disks, floppy disks and magnetic tapes, optical recording media such as CD-ROMs and DVDs, and magneto-optical media such as floppy disks ( magneto-optical media), and hardware devices specially configured to store and execute program instructions such as ROM, RAM, flash memory, and the like. Examples of program instructions may include not only machine language wires such as those created by a compiler, but also high-level language wires that can be executed by a computer using an interpreter or the like. Such hardware devices may be configured to operate as one or more software modules to perform the operations of the present invention, and vice versa.

In the above, although an embodiment of the present invention has been described, those of ordinary skill in the art can add, change, delete or add components within the scope that does not depart from the spirit of the present invention described in the claims. The present invention may be variously modified and changed by, etc., and this will also be included within the scope of the present invention.

1: Plant controller
100: state calculation unit
200: area setting unit
300: optimal state display unit
400: post-optimal state display unit
500: change rate display unit

Claims (11)

On the state graph displaying the state of the combustion control factor whose state changes according to boiler combustion, the first layer, which is an area for classifying the threshold of the target value according to the combustion optimization control, and the first layer overlapping the first layer, the combustion of the combustion control factor a region setting unit for setting a second layer, which is a region that distinguishes states before optimization and after combustion optimization;
an optimal state display unit for generating an optimal state indicator indicating the state of the combustion control factor prior to the combustion optimization according to a percentage, and displaying the generated optimal state indicator on the state graph; and
a post-optimal state display unit for generating a post-optimal state indicator indicating the state of the combustion control factor after the combustion optimization according to a percentage, and displaying the generated post-optimal state indicator on the state graph;
includes,
The second layer is
It includes one or more factor areas that distinguish the assigned combustion control factors,
The print area is
The pre-optimal state region indicating before the combustion optimization and the post-optimal state region indicating after the combustion optimization
characterized by comprising
A device for indicating the combustion status of the boiler. According to claim 1,
The first layer is
an optimization region indicating that the state of the combustion control factor is optimal;
A non-optimization region that is formed extending from the optimization region and is separated from the optimization region through a boundary line to indicate that the state of the combustion control factor is not optimal.
characterized by comprising
A device for indicating the combustion status of the boiler. delete 3. The method of claim 2,
The optimal state display unit
Displaying that the area of the pre-optimal state indicator increases from the optimized region in the optimal state region to the non-optimized region in proportion to the percentage of the combustion control factor before the combustion optimization
A device for indicating the combustion status of the boiler. 3. The method of claim 2,
The post-optimal state display unit
Displaying that the area of the post-optimum indicator increases from the optimization region in the post-optimum state region to the non-optimization region in proportion to the percentage of the combustion control factor after the combustion optimization
A device for indicating the combustion status of the boiler. 3. The method of claim 2,
The non-optimized area is
characterized in that it is further divided into a plurality of areas to display various states of the combustion control factor based on the characteristics according to the type of the combustion control factor.
A device for indicating the combustion status of the boiler. According to claim 1,
a change rate display unit for displaying a change rate indicating a percentage change in the measured value of the combustion control factor after combustion optimization compared to before combustion optimization;
characterized in that it further comprises
A device for indicating the combustion status of the boiler. The state of the combustion control factor prior to combustion optimization is determined based on the reference set value, which is the value set by the state calculator as the target value for combustion optimization, and the reference percentage, which is the percentage occupied by the optimization area, which is an area indicating that the state of the combustion control factor is optimal on the state graph. converting the pre-optimal measured value, which is the measured value, and the post-optimal measured value, which is a measured value of the state of the combustion control factor after combustion optimization, into percentages to calculate the pre-optimal percentage and the post-optimal percentage;
For the state graph, the region setting unit selects a first layer including an optimized region and a non-optimized region, and one or more factor regions including a pre-optimal state region and a post-optimal state region, and a second layer overlapping the first layer. setting;
displaying, by a pre-optimal state display unit, an optimal pre-state indicator generated according to the optimal pre-percentage in the pre-optimal state area; and
displaying, by the post-optimum state display unit, the post-optimal state indicator generated according to the post-optimal percentage in the post-optimal state area;
characterized by comprising
A method for indicating the combustion status of a boiler. 9. The method of claim 8,
The calculating step is
The pre-optimal percentage and the post-optimal percentage are calculated according to Equations A2 = A1 × S2 ÷ S1 and Equations B2 = B1 × S2 ÷ S1,
S1 is a reference set value that is a value set as a combustion optimization target value,
S2 is a reference percentage that is a percentage occupied by the optimization area, which is an area indicating that the state of the combustion control factor is in the optimized state on the state graph,
A1 is the pre-optimal measurement value,
A2 is the optimal total percentage expressed as a percentage of the state of the combustion control factor before the combustion optimization,
B1 is the post-optimal measurement value,
Wherein B2 is a percentage before and after the optimum expressed as a percentage of the value of the measurement of the state of the combustion control factor after combustion optimization
A method for indicating the combustion status of a boiler. 9. The method of claim 8,
The optimal state region is
including the optimized region and the non-optimized region as the first layer and the second layer overlap,
The step of displaying the pre-optimal state indicator in the pre-optimal state area comprises:
wherein the pre-optimal state display unit displays the pre-optimal state indicator so that an area increases from the optimized area to the non-optimized area in proportion to the optimal pre-percentage ratio
A method for indicating the combustion status of a boiler. 9. The method of claim 8,
The optimal post-state region is
including the optimized region and the non-optimized region as the first layer and the second layer overlap,
The step of displaying the post-optimal state indicator in the post-optimal state area comprises:
wherein the post-optimum state display unit displays the post-optimal state indicator so that the area increases from the optimized area to the non-optimized area in proportion to the post-optimum percentage.
A method for indicating the combustion status of a boiler.

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