KR20200002417A - Selection method of additive to reduce ash sticking occurred when using solid fuel - Google Patents

Abstract

An additive providing method is disclosed. The purpose of the present invention is to provide an additive selection method which reduces ash sticking inside a combustor and can improve economic efficiency of operation of the combustor at the same time by using an additive that can increases ash melting temperature to reduce ash sticking occurred inside a combustion boiler and evaluating economic efficiency according to injection of an expensive additive at the same time. Specifically, the additive selection method comprises: a step (a) of allowing a fuel analysis module (100) to receive inputted physical information of a solid fuel; a step (b) of allowing an ash melting proportion value calculating module (200) to calculate ash melting proportion values according to combustion temperatures by using the inputted physical information of the solid fuel and additionally inputted oxidizer information; a step (c) of allowing an ash melting proportion reduction rate value calculating module (300) to calculate ash melting proportion reduction rate values according to whether the additives are applied or not with respect to a plurality of preset additives by using the calculated ash melting proportion values; and a step (d) of allowing an additive selection module (400) to select an additive from the plurality of additives according to the calculated ash melting proportion reduction rate values.

Description

Selection method of additive to reduce ash sticking occurred when using solid fuel}

The present invention relates to a method for selecting an additive for reducing ash generated in a solid fuel combustion boiler. More particularly, the present invention relates to a method of selecting an ash melting temperature of a solid fuel used, and to recover the ash at a temperature higher than the operating temperature of the combustor when using solid fuel. The present invention relates to a method for selecting an additive for reducing ash adhesion occurring in a combustor by raising the ash melting temperature so that the melt can be melted.

When a solid fuel such as coal is used as the fuel for combustion, a phenomenon may occur in which ash is melted in the combustor and adheres to inner walls and heat exchange pipes.

Specifically, the solid fuel is basically composed of water, volatile matter composed of organic matter, fixed carbon and ash (or inorganic matter). When a solid fuel is introduced into a combustor, volatiles and fixed carbon generate thermal energy through reaction with oxygen, and are used for high temperature steam or electricity production.

However, when ash, which does not participate in the reaction, is exposed to high temperatures, a phase change occurs from a solid to a liquid (or a gas depending on the components involved). When the ashed liquid is hit along the gas stream and hits the combustor wall or heat exchanger with a temperature gradient, it sticks and solidifies.

At this time, slagging occurs in the high-temperature radiator, and fouling occurs in the convective region, which hinders the gas flow and heat transfer of the heat exchanger, thereby degrading thermal efficiency.

In addition, liquefied ash adhesion may cause corrosion of the boiler wall or the heat exchanger surface, and in some cases, the adhered ash may become large and may fall off from the adhesion surface, resulting in damage to the combustor. Can be.

Accordingly, various techniques have been disclosed to reduce or prevent such ash adhesion in advance.

Korean Patent Laid-Open No. 10-1793972 discloses a method for predicting a nonlinear melting point when mixing two or more coals by grasping nonlinear melting points for each coal in a boiler apparatus using two or more coals as fuel.

However, this type of prediction method has a limitation in that there is no consideration of a method of directly controlling the melting point of the ash by using an additive.

Korean Patent Publication No. 10-1447032 measures the composition in real time using a fluorescent X-ray analyzer before and after mixing coal or additives introduced into the combustion chamber, and using the measurement results the minimum operating temperature and maximum operating temperature of the gasifier The present invention discloses a coal and additive supplying device and a supply method capable of controlling the amount of coal or additive accordingly.

However, this type of feeding device and method adjusts the amount of coal or additives depending on the operating temperature of the gasifier, so that the method of directly controlling the melting point of the meeting using additives and the method of selecting expensive additives in some way, There is a limitation that there is no consideration about whether to evaluate.

Korea Patent Registration No. 10-1793972 (2017.11.06.) Korea Patent Registration No. 10-1447032 (2014.09.26.)

An object of the present invention is to use an additive capable of raising the ash melting temperature in order to reduce the ash adhesion occurring in the combustion boiler, while simultaneously evaluating the economics of the expensive additives, thereby reducing the ash adhesion in the combustor and at the same time. It is to provide an additive selection method that can improve the economics of operation.

In order to achieve the above object, the present invention, (a) the fuel analysis module 100 receives the property information of the solid fuel; (b) a step of calculating the ash melting rate value according to the combustion temperature by using the ash melting rate value calculating module 200 using the inputted physical property information of the solid fuel and the additionally inputted oxidant information; (c) calculating the melt rate reduction rate according to whether additives are applied to a plurality of preset additives using the ash rate ratio calculated by the ash melt rate reduction value calculating module 300; And (d) selecting the additive of any one of the plurality of additives according to the additive melt reduction ratio calculated by the additive selecting module 400.

In addition, the step (a), (a1) the industrial analysis unit 110, the step of receiving the mass ratio value of water, volatile matter, fixed carbon and ash in the fuel; (a2) receiving, by the elemental analyzer 120, a mass ratio value of carbon, hydrogen, oxygen, nitrogen, sulfur, and chlorine in the fuel; And (a3) ash component analysis unit 130 includes silicon dioxide (SiO 2), aluminum oxide (Al 2 O 3), sodium oxide (Na 2 O), iron oxide (III) (Fe 2 O 3), potassium oxide (K 2 O), calcium oxide ( And receiving mass ratio values of CaO), magnesium oxide (MgO), titanium dioxide (TiO 2), and sulfur trioxide (SO 3), and the physical property information of the solid fuel includes the industrial analysis unit 110 and the elemental analysis. The unit 120 and the ash component analyzer 130 may include the mass ratio values respectively input.

In addition, the step (b), (b1) the fuel information input unit 210 receives the property information of the solid fuel; And (b2) receiving the oxidant information by the oxidant information input unit 220, and the oxidant information may include oxygen and nitrogen ratio values included in the oxidant.

In addition, after the step (b2), the (b3) ash melting rate calculator 230 may include calculating the ash melting rate value according to the combustion temperature using the properties of the solid fuel and the oxidant information. Can be.

In addition, the step (c), (c1) the additive information input unit 310 receives the information of the plurality of additives; (c2) calculating the additive input result for each additive by using the information of the plurality of additives inputted by the additive input calculating unit 320; And (c3) assigning a ranking to each of the additives by using the additive input result calculated by the additive ranking unit 330, wherein the additive melting result includes the ash melting ratio value according to the additive input. The amount of change may be mapped and stored according to the temperature condition in which the additive is added.

In addition, in the step (c3), the rank may be given in the order of increasing the melting rate reduction rate value calculated by the predetermined method.

In addition, the step (d), (d1) the combustion temperature comparing unit 410 compares the actual combustion temperature and the temperature conditions under which the added additive is added; (d2) filtering, by the additive filtering unit 420, of the ranked additives compared by the combustion temperature comparing unit 410, the temperature condition at which the additive is input is equal to the actual combustion temperature; And (d3) the cost ranking unit 430 calculating a cost according to the input of the additive filtered by the additive filtering unit 420 and assigning a rank to the filtered additive, wherein the ranking is: The lower the cost of using the filtered additive, the higher the ranking can be given.

In addition, after the step (d3), (d4) the economic determination unit 440 compares the ash melt rate reduction rate value according to the filtered additive input given the order with a predetermined reference melt rate reduction rate value. step; And (d5) when the additive melting rate reduction rate exceeds the predetermined reference ash rate reduction rate, the additive selecting unit 450 selects an additive having the highest rank among the filtered additives to which the order is given. It may include a step.

According to the present invention, since the information on the oxidant as well as the physical property information of the fuel is used to calculate the ash melting temperature in the combustor, the calculated ash melting temperature and the accuracy of selecting a suitable additive can be improved.

In addition, since the selected additive is filtered based on the actual combustion temperature and economic efficiency of the combustor, and the additive is determined whether to add the additive, it is possible to efficiently and economically utilize the expensive additive to reduce the adhesion.

1 is a block diagram showing a configuration for performing an additive selection method according to an embodiment of the present invention.
FIG. 2 is a block diagram showing a configuration of a fuel analysis module among the components of FIG. 1.
FIG. 3 is a block diagram showing the configuration of the ash melting ratio value calculating module in the configuration of FIG. 1.
4 is a graph showing the change of the melting ratio according to the temperature change based on the injected fuel.
FIG. 5 is a block diagram showing the configuration of the ash melting rate reduction rate calculating module among the components of FIG. 1.
FIG. 6 is a block diagram illustrating a configuration of an additive selection module in the configuration of FIG. 1.
FIG. 7 is a flowchart illustrating a process of selecting an additive according to an embodiment of the present invention by the configuration of FIG. 1.
FIG. 8 is a flowchart illustrating a detailed process in which the fuel analysis module of FIG. 7 receives property information of a solid fuel.
FIG. 9 is a flowchart illustrating a detailed process of calculating the ash melting rate value according to the combustion temperature by calculating the melt fuel property information and the additional input oxidant information of the calculated solid fuel.
FIG. 10 is a flowchart illustrating a detailed process of calculating a melt rate reduction rate value according to whether additives are applied using the melt rate value calculation module calculated in FIG. 7.
FIG. 11 is a flowchart illustrating a detailed process of selecting an additive based on the reduction rate value calculated by the additive selecting module of FIG. 7.

Hereinafter, with reference to the accompanying drawings will be described in detail the additive selection method according to an embodiment of the present invention.

The term "solid fuel" as used in the following description refers to all fuels in solid state such as biomass as well as fossil fuels such as coal.

The term "additive" as used in the description below refers to all materials except fuel and oxidants added during combustion.

1. Description of the additive inlet 10

The present invention provides a method of selecting an additive to be added to raise the ash melting temperature relative to the combustion temperature so that ash can remain solid in order to prevent ash sticking in the combustor 1.

To this end, the present invention includes an additive inlet (10).

The additive input unit 10 selects an additive to be introduced into the combustor 1 through a process to be described later, and determines whether or not the selected additive is added according to the combustion temperature and the economic evaluation result.

1, the additive input unit 10 according to an embodiment of the present invention is the fuel analysis module 100, ash melting rate value calculation module 200, ash melting rate reduction rate calculation module 300 and additive selection Module 400.

(1) Description of Fuel Analysis Module 100

The fuel analysis module 100 receives physical property information of a solid fuel through industrial analysis, elemental analysis, and ash component analysis based on a solid fuel analysis method.

At this time, the solid fuel analyzed in the fuel analysis module 100 is not limited to the fuel to be injected into the combustor 1. That is, the fuel analysis module 100 analyzes all the solid fuels that may be injected into the combustor 1 to grasp the physical properties of each solid fuel.

Referring to FIG. 2, the fuel analysis module 100 includes an industrial analysis unit 110, an elemental analysis unit 120, and an ash component analysis unit 130.

The industrial analysis unit 110 receives a mass ratio value of moisture, volatile matter, fixed carbon, and ash contained in the fuel. The analysis result of the industrial analysis unit 110 is used as background data for deriving the ratio of ash.

The element analyzer 120 receives mass ratio values of carbon, hydrogen, oxygen, nitrogen, sulfur, and chlorine.

Ash component analysis unit 130, the main components are expected to generate silicon dioxide (SiO2), aluminum oxide (Al2O3), sodium oxide (Na2O), iron oxide (III) (Fe2O3), potassium oxide (K2O), calcium oxide The mass ratio values of (CaO), magnesium oxide (MgO), titanium dioxide (TiO 2) and sulfur trioxide (SO 3) are input.

That is, the physical property information of the solid fuel input by the fuel analysis module 100 includes each mass ratio value input to the industrial analysis unit 110, the elemental analysis unit 120, and the ash component analysis unit 130.

In one embodiment, the mass ratio value analyzed by each analysis unit 110, 120, 130 is displayed as a percentage (%), the input mass ratio value, the properties of the solid fuel information is the melting ratio calculation module 200 Is delivered.

(2) Description of ash melt rate value calculation module 200

The ash melting rate calculation module 200 calculates the ash melting rate value according to the combustion temperature by calculating the property information of each solid fuel input to the fuel analysis module 100 and additional input oxidant information to be described later.

Specifically, the ash melt rate calculation module 200 determines the melting characteristics (melt rate) of various solid fuels according to the combustion temperature, and calculates the ash melt rate value accordingly.

Referring to FIG. 3, the ash melting rate calculating module 200 includes a fuel information input unit 210, an oxidant information input unit 220, and a ash melting rate value calculating unit 230.

The fuel information input unit 210 receives physical property information, that is, a mass ratio value, of each solid fuel calculated by the fuel analysis module 100.

The oxidant information input unit 220 additionally receives oxidant information that can be injected into the combustor 1 and analyzes its components. The oxidant information includes mass ratio values of oxygen and nitrogen in the oxidant. That is, the oxidant information input unit 220 calculates the oxidation condition or the reduction condition according to the mass ratio value of oxygen or the mass ratio value of nitrogen in the oxidant.

The ash melting rate calculating unit 230 calculates the ash melting rate value according to the combustion temperature by using the physical property information of each solid fuel input to the fuel information input unit 210 and the oxidant information input to the oxidant information input unit 220. .

Ash melt ratio values can be calculated by a computer program (eg, FactSage program, etc.) using a thermodynamic analysis method (based on Gibbs free energy).

Alternatively, the melt rate value may be calculated via a separate programming task.

At this time, the ash melting rate according to the combustion conditions is formed by forming the oxidizing condition or the reducing condition according to the ratio of oxygen in the oxidant using not only the physical property information of each solid fuel but also the oxidant information as a factor for calculating the ash melting rate value. It is possible to improve the accuracy of the prediction.

In one embodiment, the ash melting ratio for each combustion temperature may be derived by the following equation.

는 회의 질량 중 용융된 회의 질량이며,

는 회의 질량 중 고체 상태의 회의 질량이다.At this time,

Is the mass of molten ash of the mass

Is the mass of the solid in the mass of the mass.

Referring to Fig. 4, the melting ratios with temperature of different specific solid fuels, namely coal and biomass, calculated by the above equations are shown. In the illustrated embodiment, the ash melt ratio varies somewhat linearly, but in other embodiments it may vary nonlinearly.

In addition, the ash melting temperature is a temperature at which solid ash in the ash component melts and is phase-transformed into a liquid state. Even if the combustion temperature in the combustor 1 reaches the melting temperature, adhesion may not occur immediately.

Referring to this, even when a fuel having the same physical property information and an oxidant having the same oxidant information are burned, the ash melting ratio value is changed differently according to the combustion temperature.

The difference in ash melting rate value according to the combustion temperature is reflected through the filtering process in the additive selection module 400 to be described later.

(3) Description of ash melt rate reduction rate calculation module 300

The ash melt rate reduction rate calculation module 300 calculates the ash melt rate reduction rate according to whether additives are applied to a plurality of preset additives using the calculated ash melt rate value.

The ash melting rate reduction rate calculation module 300 receives the information of each additive, calculates the result of the addition of each additive at each combustion temperature, and assigns the ranking to the ash melting rate reduction rate.

Referring to FIG. 5, the ash melting rate reduction rate calculating module 300 includes an additive information input unit 310, an additive input result calculating unit 320, and an additive ranking unit 330.

The additive information input unit 310 receives information about a plurality of preset additives, that is, available additives. In this case, the information of the additive input to the additive information input unit 310 includes not only the additive to be input to the combustor 1 but also information of all additives that can be used to reduce the ash melting temperature in a normal combustion process.

To this end, an additive database (not shown) storing chemical formula information on each of the available additives, information on the effect of reducing the melting temperature at the time of inputting, and information on the unit cost is provided, so that the information necessary for the additive information input unit 310 is provided. Can be delivered.

The additive input result calculating unit 320 calculates the additive input result according to each combustion temperature according to the information of each additive input through the additive information input unit 310.

To this end, the additive input result calculation unit 320 may be provided with data from a database (not shown) stored by mapping the change value of the melting temperature when the additive is added according to the type of the additive and the temperature condition in which the additive is added.

In addition, in the database (not shown), the chemical formula and purchase amount representing the chemical composition of each additive are also mapped and stored.

At this time, the input amount of the additive may be expressed as a ratio with respect to the mass of the fuel.

The additive ranking unit 330 arranges the additive input result calculated by the additive input result calculating unit 320 in a predetermined manner and gives the ranking.

At this time, the predetermined method is a method for aligning and ranking the additives using the additive input result, and in one embodiment, the alignment criteria of the additives may be a melting rate reduction rate value.

Specifically, the additive ranking unit 330 calculates the ash melting ratio reduction rate value in each situation. As an example, the following equation may be used.

When the ash melt rate reduction rate value in each situation is calculated, the additive ranking part 330 ranks each additive in the order of high ash melt rate reduction rate values.

Information about each additive assigned by the additive ranking unit 330 is transferred to the additive selection module 400 to be described later.

(4) Description of Additive Selection Module 400

The additive selecting module 400 selects one or more additives to be added from among a plurality of preset additives according to the ash melting ratio reduction rate value calculated by the ash melting ratio reduction rate calculating module 300 and the rank of each additive.

As described above, the preset plurality of additives, that is, the usable additives, includes not only additives to be input to the combustor 1, but also all additives which can be used to reduce ash melting temperature in a normal combustion process.

In addition, the additive selection module 400 uses the combustion temperature and economic evaluation results of the inside of the combustor 1 in which actual combustion takes place as a condition for selecting an additive suitable to be injected.

To this end, the additive selection module 400 includes a combustion temperature comparison unit 410, an additive filtering unit 420, a cost ranking unit 430, an economic determination unit 440, and an additive selection unit 450.

The combustion temperature comparison unit 410 compares the combustion temperature inside the combustor 1 in which actual combustion takes place and the temperature conditions under which the additives ranked in the additive ranking unit 330 are injected.

Specifically, when the actual combustion temperature meets the temperature condition that the reduction of the ash melting temperature by each additive is the maximum, the effect of the additive addition can be maximized, which depends on the combustion temperature even when the same additive is added. This is because, in the present invention, the width of the ash melting temperature increase is different.

At this time, the actual combustion temperature which is the basis of the comparison can be determined by measuring the temperature inside the actual combustor 1, and any combustion temperature may be input by the user or the like.

The additive filtering unit 420 uses the comparison result between the actual combustion temperature in the combustion temperature comparison unit 410 and the temperature condition in which the additive is injected, so that the temperature condition at which the effect of the additive is maximized corresponds to the actual combustion temperature. To filter.

In addition, it is preferable that the temperature condition at which the effect of the additive addition is maximized is the same as the actual combustion temperature. However, in some embodiments, even if there are some differences but not exactly the same, it may be included in the filtering target.

인 온도 범위가 온도 조건에 만족하는 것으로 설정될 수 있다.At this time, the temperature conditions for setting the filtering target may be determined differently according to the combustion situation, in one embodiment the error range is

The phosphorus temperature range can be set to satisfy the temperature conditions.

The cost ranking unit 430 calculates a cost according to the input of the additive filtered by the additive filtering unit 420 and assigns the ranking to the filtered additive.

At this time, since the filtered additives are already suitable for the combustion temperature or the input temperature condition inside the combustor 1, the cost ranking unit 430 assigns the ranking by focusing on the consumption cost of using the additives.

In one embodiment, the lower the cost consumed by the additive input can be given a higher rank.

The economic determination unit 440 compares the ash melt rate reduction rate value according to the filtered additive input with a predetermined ash melt rate reduction rate value, which is ranked in the cost ranking unit 430.

This is because additives injected during combustion are generally expensive, so even though the effect of raising the ash melting temperature to prevent ash adhesion in the combustor 1 is excellent, the additive is compared with the economical effect that can be obtained by the prevention of ash adhesion. If the economic losses from the input are greater, it is better to avoid the addition of additives.

Therefore, the cost of additives and the economic benefits of increasing the melt rate reduction rate according to the additives are compared. It is preferable to add.

In one embodiment, the economic benefits of the increase in the ash melting rate reduction rate resulting from the addition of such additives may be used as a reference value in terms of the ash melting rate reduction rate.

The additive selecting unit 450 selects an additive to be injected into the combustor 1 by using the result compared by the economic determination unit 440.

In detail, the additive selecting unit 450 includes the combustor 1 among the additives in which the ash melting rate reduction rate according to the additive input is greater than the predetermined ash melting rate reduction rate, that is, the reference value, according to the comparison result of the economic determination unit 440. Select the additive to be added to.

At this time, the additive selection unit 450 is a rank given by the cost ranking unit 430 in order to select any one of the additives whose ash melt rate reduction rate due to the additive input exceeds a predetermined ash melt rate reduction rate value. It is possible to select the additive with the highest additive, that is, the additive with the lowest cost due to the additive input.

2. Description of additive selection method

Hereinafter, an additive selection method using the additive input unit 10 according to the embodiment of the present invention will be described in detail with reference to FIGS. 7 to 11.

Referring to FIG. 7, in the method of selecting an additive according to an exemplary embodiment of the present invention, the fuel analysis module 100 receives the information on the properties of the solid fuel (S100), and the ash melting rate calculation module 200 is input to the solid. Computing the ash melting ratio value according to the combustion temperature by using the properties of the fuel and the information of the additional oxidant (S200), the ash melting rate reduction rate calculation module 300 is based on the calculated Calculating a melt rate reduction rate value according to whether additives are applied to a plurality of set additives (S300) and selecting the additive of any one of a plurality of additives according to the calculated reduction value by the additive selection module 400 ( S400).

(1) Description of the step (S100) in which the fuel analysis module 100 receives the property information of the solid fuel

This step is to analyze the influence of the characteristics of the solid fuel in the combustion environment for the additive selection.

Hereinafter, this step will be described in detail with reference to FIG. 8.

First, the industrial analysis unit 110 receives the mass ratio values of water, volatile matter, fixed carbon, and ash in the fuel (S110). The calculated mass ratio value is utilized as background data for derivation of the ratio of ash.

Next, the elemental analyzer 120 receives mass ratio values of carbon, hydrogen, oxygen, nitrogen, sulfur, and chlorine in the fuel (S120).

In addition, the ash component analyzer 130 receives mass ratio values of silicon dioxide, aluminum oxide, sodium oxide, iron oxide (III), potassium oxide, calcium oxide, magnesium oxide, titanium dioxide, and sulfur trioxide in the fuel (S130).

That is, the physical property information of the solid fuel input in this step includes each mass ratio value input to the industrial analysis unit 110, the elemental analysis unit 120, and the ash component analysis unit 130.

The mass ratio values input to the analyzers 110, 120, and 130 are expressed as percentages, and the analyzed mass ratio values and the properties of the solid fuel are transmitted to the ash melting rate calculation module 200. Same as one.

(2) Description of the step (S200) of the ash melting rate value calculating module 200 calculating the ash melting rate value according to the combustion temperature by using the input properties of the solid fuel and the oxidant information.

This step calculates the ash melting rate value according to each combustion temperature by using the information on the properties of the solid fuel input in the previous step (S100) and the additional input oxidant information input to the combustor (1), so that It is a step for deriving the ash melt ratio value.

In this step, oxidant information is additionally input as another factor for calculating the ash melting ratio value according to the combustion temperature.

Hereinafter, this step will be described in detail with reference to FIG. 9.

First, the fuel information input unit 210 receives physical property information of the solid fuel (S210). Specifically, the physical property information of the solid fuel input to the fuel information input unit 210 is the mass input to the industrial analysis unit 110, elemental analysis unit 120 and ash component analysis unit 130 in the previous step (S100). Contains the ratio value.

Next, the oxidant information input unit 220 receives additional oxidant information (S220). Specifically, the oxidant information input to the oxidant information input unit 220 is information about a gas that can be added as an oxidant to the combustor 1 and includes oxygen and nitrogen ratio values contained in the oxidant.

In addition, the ash melting rate calculating unit 230 calculates the ash melting rate value according to the combustion temperature using the properties of the solid fuel and the oxidant information (S230). Ash melt ratio values can be calculated by commercialized programs and the like.

In another embodiment, a separate program may be further programmed by the ash melting rate calculator 230 to calculate the ash melt rate value according to the combustion temperature by using the properties of the solid fuel and the oxidant information.

(3) Description of the step (S300) of the ash melting rate reduction rate calculating module 300 calculating the ash melting rate reduction rate according to whether additives are applied to a plurality of preset additives using the calculated ash melting rate value.

This step is to generate the background data for selecting the additive suitable for the combustion conditions by calculating the ash melting ratio reduction rate value at a specific temperature using the ash melting ratio value calculated in the previous step (S200).

Hereinafter, this step will be described in detail with reference to FIG. 10.

First, the additive information input unit 310 receives information of a plurality of additives (S310). In this case, as described above, the plurality of additive information input to the additive information input unit 310 includes all additive information that may be used to increase the melting temperature, rather than a specific additive.

Next, the additive input result calculating unit 320 calculates the additive input result for each additive by using the information of the plurality of additives input (S320). To this end, as described above, a separate database (not shown) may be provided in which the amount of change in the melting temperature of the additive is mapped and stored according to the type of the additive and the temperature condition in which the additive is added.

In addition, the additive ranking unit 330 ranks each additive by using the calculated additive input result (S330). The additive ranking unit 330 may calculate the ash melting ratio reduction rate value in each situation by the equation illustrated above.

When the ash melt rate reduction rate value in each situation is calculated, the additive ranking part 330 ranks each additive in the order of high ash melt rate reduction rate values.

(4) Description of the step (S400) of selecting any one of a plurality of additives according to the additive selection module 400 calculated reduction value

This step is to select an additive to be added to any one or more of the additives and a plurality of additives based on the ranking given according to the ash melting ratio reduction rate value calculated in the previous step (S300), the actual combustion temperature and economical efficiency occurs. Step.

Hereinafter, this step will be described in detail with reference to FIG. 11.

First, the combustion temperature comparison unit 410 compares the actual combustion temperature and the temperature conditions to which the additive given the ranking (S410). That is, since the rank given to each additive in the previous step (S300) is a rank according to a specific temperature condition, it is compared with the actual combustion temperature.

Next, the additive filtering unit 420 filters the additives having the same temperature condition under which the actual combustion temperature and the additive are added as a result of the comparison performed by the combustion temperature comparing unit 410 (S420). In other words, the additives filtered out here are those which meet the actual combustion temperature conditions.

In addition, the cost ranking unit 430 calculates the cost according to the input of the additive filtered by the additive filtering unit 420 and assigns a rank to the filtered additive (S430). That is, it reflects the different costs of each additive that meets the actual combustion temperature conditions.

At this time, the lower the price of the additive, that is, the lower the cost of using the additive is advantageous in terms of economics, it is given a high rank.

Next, the economics determination unit 440 compares the ash melt rate reduction rate value according to the filtered additive addition ordered with the predetermined reference ash melt rate reduction rate (S430).

This is because additives added during combustion are generally expensive, so even though the effect of raising the ash melting temperature to prevent ash adhesion in the combustor 1 is excellent, the additives are compared with the economic effects obtained by the ash adhesion prevention. It is more advantageous to avoid the addition of additives if the economic losses from the input are greater.

Therefore, the cost of additives and the economic benefits of increasing the melt rate reduction rate according to the additives are compared. It is preferable to add.

In an embodiment, as described above, the ash melting ratio reduction rate value may be converted and used as a measure of economic efficiency.

Finally, when the ash melting rate reduction rate value exceeds a predetermined reference ash melting rate reduction rate value, the additive selecting unit 450 selects the additive having the highest rank among the filtered additives to which the order is given (S450).

That is, the additive selecting unit 450 calculates that the additive is added only when the economical efficiency of the additive is higher than the reference economical value, and calculates that the additive is not added separately when the economical efficiency of the additive is equal to the standard economical efficiency. .

In addition, when there are a plurality of additives having higher economics than the reference economics due to the additive input, the additive selecting unit 450 may improve the economics by selecting an additive having the highest rank given by the cost ranking unit 430 among them. Can be.

According to the present invention, in selecting an additive for preventing the damage of the combustor 1 and the reduction of the combustion efficiency due to the ash adhesion by increasing the ash melting temperature, it is possible to use a suitable additive using both the physical properties information and the oxidant information of the solid fuel. Since it is selected, it is possible to select a suitable additive for the purpose.

In addition, the selected additives are filtered according to the actual combustion temperature, and economical evaluation of the filtered additives is performed to select and add only additives that satisfy the evaluation, so that additives suitable for combustion may be selected.

Furthermore, the ranking is given through the ranking according to the combustion conditions and the economic evaluation, and through this it is possible to select the best additives, it is possible to maximize the effect and the economics of the use of expensive additives.

Although it has been described above with reference to preferred embodiments of the present invention, those skilled in the art will be able to variously modify and change the present invention without departing from the spirit and scope of the invention described in the claims below. It will be appreciated.

1: combustor
10: additive input unit
100: fuel analysis module
110: industrial analysis unit
120: elemental analysis unit
130: ash component analysis unit
200: ash melt ratio calculation module
210: fuel information input unit
220: oxidant information input unit
230: ash melt ratio calculation unit
300: melt rate reduction rate calculation module
310: additive information input unit
320: additive injection result calculation unit
330: additive ranking part
400: Additive Selection Module
410: combustion temperature comparison unit
420: additive filtering unit
430: cost ranking
440: Economic Determination Unit
450: additive selection unit

Claims (8)

(a) receiving, by the fuel analysis module 100, property information of the solid fuel;
(b) calculating, by the ash melting rate calculating module 200, the ash melting rate value according to the combustion temperature by using the input properties of the solid fuel and the additionally inputted oxidant information;
(c) calculating the melt rate reduction rate according to whether additives are applied to a plurality of preset additives using the ash rate ratio calculated by the ash melt rate reduction value calculating module 300; And
(d) selecting the additive of any one of the plurality of additives according to the additive melting rate reduction rate value calculated by the additive selecting module 400,
How to choose an additive.
The method of claim 1,
In step (a),
(a1) receiving, by the industrial analyzer 110, a mass ratio value of water, volatile matter, fixed carbon, and ash in the fuel;
(a2) receiving, by the elemental analyzer 120, a mass ratio value of carbon, hydrogen, oxygen, nitrogen, sulfur, and chlorine in the fuel; And
(a3) The ash component analyzing unit 130 includes silicon dioxide (SiO 2), aluminum oxide (Al 2 O 3), sodium oxide (Na 2 O), iron oxide (III) (Fe 2 O 3), potassium oxide (K 2 O), and calcium oxide (CaO) in the fuel. ), And receiving a mass ratio value of magnesium oxide (MgO), titanium dioxide (TiO 2) and sulfur trioxide (SO 3),
Physical property information of the solid fuel,
The industrial analysis unit 110, the elemental analysis unit 120 and the ash component analysis unit 130 includes the mass ratio value received, respectively,
How to choose an additive.
The method of claim 2,
In step (b),
(b1) receiving, by the fuel information input unit 210, property information of the solid fuel; And
(b2) including receiving, by the oxidant information input unit 220, the oxidant information;
In the oxidant information,
Oxygen and nitrogen ratio value that the oxidant contains,
How to choose an additive.
The method of claim 3,
After the step (b2),
(b3) including a step of calculating a melt rate value according to a combustion temperature by using the ash melt rate calculator 230 using physical property information and the oxidant information of the solid fuel;
How to choose an additive.
The method of claim 4, wherein
In step (c),
(c1) a step in which an additive information input unit 310 receives information of the plurality of additives;
(c2) calculating the additive input result for each additive by using the information of the plurality of additives inputted by the additive input calculating unit 320; And
(c3) adding a ranking to each of the additives by using the additive ranking result of the additive ranking unit 330 calculated;
In the additive addition result,
The amount of change in the ash melting ratio value according to the additive addition is mapped and stored according to the temperature condition in which the additive is added,
How to choose an additive.
The method of claim 5,
In the step (c3),
The ranking is given in the order of increasing the melting rate reduction rate value calculated by the preset method,
How to choose an additive.
The method of claim 6,
In step (d),
(d1) the combustion temperature comparing unit 410 comparing the actual combustion temperature with a temperature condition in which the ranked additive is added;
(d2) an additive filtering unit 420 filtering an additive having a temperature condition at which the additive is added among the ranked additives compared by the combustion temperature comparing unit 410 equal to the actual combustion temperature; And
(d3) a cost ranking unit 430 calculating a cost according to the input of the additive filtered by the additive filtering unit 420 and assigning a rank to the filtered additive,
The ranking is,
The lower the cost according to the use of the filtered additive is given a higher rank,
How to choose an additive.
The method of claim 7, wherein
After the step (d3),
(d4) comparing, by the economic determination unit 440, the ash melting rate reduction rate value according to the filtered additive addition with the order, and a predetermined reference ash melting rate reduction rate value; And
(d5) when the additive melting rate reduction value exceeds the predetermined reference ash rate reduction rate, the additive selecting unit 450 selects the additive having the highest rank among the filtered additives to which the order is given; Including,
How to choose an additive.

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