Method for controlling boost fan, control device for boost fan, information processing device, information processing system, and method for controlling information processing system

Abstract

To provide a control method for a pressure rise ventilator for maintaining a suitable opening degree by the pressure rise ventilator, a control device for the pressure rise ventilator, an information processing unit, an information processing system and a control method for the information processing system.SOLUTION: A control method for a pressure rise ventilator provided at an exhaust gas exhaust line for exhausting an exhaust gas exhausted from a combustion facility comprises: an operation information acquisition step of acquiring operation information of an induction ventilator provided at the upstream side of the exhaust gas exhaust line than the pressure rise ventilator; a control value determination step of determining a control value of the pressure rise ventilator based on the operation information of the induction ventilator; and a control value correction step of correcting the control value based on a deviation between a set value of information regarding the pressure of the exhaust gas in the downstream side of the exhaust gas exhaust line than the induction ventilator and a measured value thereof.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present disclosure relates to a control method for a boost fan provided in an exhaust gas exhaust line for discharging exhaust gas discharged from a combustion facility, a control device for the boost fan, an information processing device, an information processing system, and a control method for an information processing system. [Background technology]

[0002] For example, exhaust gas discharged from a combustion facility such as a boiler contains air pollutants such as sulfur oxides (SOx), and the sulfur oxides are removed from the exhaust gas in a desulfurization device before the exhaust gas is released into the atmosphere in a chimney. In a conventional plant, an induced draft fan is provided between the combustion facility and the desulfurization device in an exhaust gas discharge line for discharging the exhaust gas discharged from the combustion facility, and a boost fan is provided between the desulfurization device and the chimney in the exhaust gas discharge line (see Patent Document 1). In such a conventional plant, there is a bypass line that branches off from the exhaust gas discharge line between the induced draft fan and the desulfurization device in the exhaust gas discharge line, bypasses the desulfurization device and the boost fan, and is connected between the boost fan and the chimney in the exhaust gas discharge line, and a bypass damper that is provided in the bypass line and is capable of adjusting the flow rate of the exhaust gas (see Patent Document 1).

[0003] In conventional plants, a bypass line is provided from the viewpoint of equipment protection, and environmentally friendly exhaust gas generated by burning diesel fuel and the like is discharged into the atmosphere from a chimney after passing through the bypass line. In recent years, as exhaust gas emission regulations have tended to be strengthened, environmentally friendly exhaust gas is now also passed through a desulfurization device. In addition, the reliability of the devices and equipment installed in the exhaust gas discharge line has improved, making bypass lines unnecessary as safety equipment. For this reason, in recent plants, there is a tendency to improve the output performance of induced draft fans compared to conventional plants and to omit bypass lines and boost fans. However, some conventional plants still have induced draft fans and boost fans in operation. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2000-84353 A Summary of the Invention [Problem to be solved by the invention]

[0005] Patent Document 1 describes that when both an induced draft fan and a boost fan, each of which blows exhaust gas, are installed in an exhaust gas discharge line, the induced draft fan and the boost fan are driven synchronously, but does not disclose the specific details. If the opening degree of the boost fan is uniquely determined according to the opening degree of the induced draft fan, the boost fan may not be able to maintain an appropriate opening degree because it cannot respond to changes in the state downstream of the induced draft fan in the exhaust gas discharge line. If the boost fan cannot maintain an appropriate opening degree, for example, the flow of exhaust gas in the exhaust gas discharge line may be stagnated, which may lead to a decrease in the desulfurization efficiency in the desulfurization device and an increase in the load on the boost fan.

[0006] In view of the above-mentioned circumstances, an object of at least one embodiment of the present disclosure is to provide a control method for a boost fan, which maintains the boost fan at an appropriate opening angle, a control device for a boost fan, an information processing device, an information processing system, and a control method for an information processing system. [Means for solving the problem]

[0007] The method for controlling a boost fan according to the present disclosure includes: A method for controlling a booster fan provided in an exhaust gas exhaust line for exhausting exhaust gas discharged from a combustion facility, comprising: an operation information acquisition step of acquiring operation information of an induced draft fan provided upstream of the exhaust gas discharge line relative to the boost fan; a control value determination step of determining a control value for the boost fan based on the operation information of the induced draft fan; and a control value correction step of correcting the control value based on a deviation between a set value and a measured value of information regarding the pressure of the exhaust gas downstream of the induced draft fan in the exhaust gas discharge line.

[0008] The control device for a boost fan according to the present disclosure includes: A control device for a booster fan provided in an exhaust gas exhaust line for exhausting exhaust gas discharged from a combustion facility, a control value determination unit configured to determine a control value of the boost fan based on operation information of an induced draft fan provided upstream of the boost fan in the exhaust gas discharge line; a control value correction unit configured to correct the control value based on a deviation between a set value and a measured value of information regarding the pressure of the exhaust gas in the exhaust gas discharge line downstream of the induced draft fan; and an opening control unit that controls an opening of the boost fan based on the control value corrected in the control value correction unit.

[0009] The information processing device according to the present disclosure includes: An information processing device that executes processing related to a control method for a booster fan provided in an exhaust gas exhaust line for discharging exhaust gas discharged from a combustion facility, a control value determination unit configured to determine a control value of the boost fan based on operation information of an induced draft fan provided upstream of the boost fan in the exhaust gas discharge line; and a control value correction unit configured to correct the control value based on a deviation between a set value and a measured value of information regarding the exhaust gas pressure in the exhaust gas discharge line downstream of the induced draft fan.

[0010] The information processing system according to the present disclosure includes: An information processing system including an information processing device that executes processing related to a control method for a booster fan provided in an exhaust gas exhaust line for exhausting exhaust gas discharged from a combustion facility, and a terminal connected to be able to communicate with the information processing device, a control value determination unit configured to determine a control value of the boost fan based on operation information of an induced draft fan provided upstream of the boost fan in the exhaust gas discharge line in response to a request from the terminal; and a control value correction unit configured to correct the control value based on a deviation between a set value and a measured value of information regarding the exhaust gas pressure in the exhaust gas discharge line downstream of the induced draft fan.

[0011] The control method for an information processing system according to the present disclosure includes: A control method for an information processing system including an information processing device that executes processing related to control of a booster fan provided in an exhaust gas exhaust line for exhausting exhaust gas discharged from a combustion facility, and a terminal connected so as to be able to communicate with the information processing device, The information processing device includes: a control value determination step configured to determine a control value of the boost fan based on operation information of an induced draft fan provided upstream of the boost fan in the exhaust gas discharge line in response to a request from the terminal; and a control value correction step configured to correct the control value based on a deviation between a set value and a measured value of information regarding the exhaust gas pressure in the exhaust gas discharge line downstream of the induced draft fan. Effect of the Invention

[0012] According to at least one embodiment of the present disclosure, there are provided a control method for a boost fan, capable of maintaining an appropriate opening degree of the boost fan, a control device for a boost fan, an information processing device, an information processing system, and a control method for an information processing system. [Brief description of the drawings]

[0013] [Figure 1] 1 is a schematic configuration diagram of an exhaust gas discharge system including a boost fan that is a control target in a control method for a boost fan according to an embodiment of the present disclosure. [Diagram 2] FIG. 4 is a flow diagram illustrating an example of a control method for a boost fan according to an embodiment of the present disclosure. [Diagram 3] FIG. 2 is an explanatory diagram for explaining a function of a control device for a boost fan according to an embodiment of the present disclosure. [Figure 4] FIG. 4 is a flow diagram illustrating an example of a control method for a boost fan according to an embodiment of the present disclosure. [Diagram 5] FIG. 2 is an explanatory diagram for explaining a function of a control device for a boost fan according to an embodiment of the present disclosure. [Figure 6] 1 is a schematic diagram illustrating an exhaust gas emission system including a boost fan that is a control target in a control method for a boost fan according to an embodiment of the present disclosure, and an information processing system. [Figure 7] FIG. 2 is an explanatory diagram for explaining functions of an information processing device according to an embodiment of the present disclosure. [Figure 8] FIG. 2 is an explanatory diagram for explaining functions of an information processing device according to an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Hereinafter, some embodiments of the present disclosure will be described with reference to the accompanying drawings. However, the dimensions, materials, shapes, relative arrangements, etc. of components described as the embodiments or shown in the drawings are merely illustrative examples and are not intended to limit the scope of the present disclosure. For example, expressions expressing relative or absolute configuration, such as "in a certain direction," "along a certain direction," "parallel," "orthogonal," "center," "concentric," or "coaxial," not only strictly express such a configuration, but also express a state in which there is a relative displacement with a tolerance or an angle or distance to the extent that the same function is obtained. For example, expressions indicating that things are in an equal state, such as "identical," "equal," and "homogeneous," not only indicate a state of strict equality, but also indicate a state in which there is a tolerance or a difference to the extent that the same function is obtained. For example, expressions describing shapes such as a rectangular shape or a cylindrical shape do not only refer to rectangular shapes, cylindrical shapes, etc. in the strict geometric sense, but also refer to shapes that include uneven portions, chamfered portions, etc., to the extent that the same effect is obtained. On the other hand, the expressions "comprise", "include", or "have" a certain element are not exclusive expressions excluding the presence of other elements. In addition, the same components are denoted by the same reference numerals and the description thereof may be omitted.

[0015] (Exhaust Gas Emission System) FIG. 1 is a schematic diagram of an exhaust gas discharge system including a boost fan that is a control target in a control method for a boost fan according to an embodiment of the present disclosure. As shown in FIG. 1, the exhaust gas discharge system 1 includes at least an exhaust gas discharge line 2 for discharging exhaust gas discharged from a combustion equipment 11 such as a boiler, a boost fan (BUF) 3 provided in the exhaust gas discharge line 2, and an induced draft fan (IDF) 4 provided upstream of the boost fan 3 in the exhaust gas discharge line 2.

[0016] The exhaust gas discharge system 1 is provided in a plant (e.g., a power plant) equipped with a combustion equipment 11 and a chimney 12. As shown in Fig. 1, the exhaust gas discharge line 2 has the combustion equipment 11 connected to one side thereof, and the chimney 12 connected to the other side thereof for discharging the exhaust gas flowing through the exhaust gas discharge line 2 into the atmosphere. The exhaust gas guided from the combustion equipment 11 to the exhaust gas discharge line 2 is pressurized by the induced draft fan 4 and the boost fan 3, and flows toward the chimney 12. Hereinafter, the upstream side (one side) of the exhaust gas flow direction in the exhaust gas discharge line 2 may be simply abbreviated to the upstream side, and the downstream side (the other side) of the exhaust gas flow direction in the exhaust gas discharge line 2 may be simply abbreviated to the downstream side.

[0017] In the illustrated embodiment, the exhaust gas discharge system 1 includes an electrostatic precipitator 13 provided between the combustion equipment 11 and the induced draft fan 4 in the exhaust gas discharge line 2, and a desulfurization device 14 provided between the induced draft fan 4 and the boost fan 3 in the exhaust gas discharge line 2, as shown in FIG. 1. The electrostatic precipitator 13 is configured to remove soot contained in the exhaust gas. The desulfurization device 14 is configured to desulfurize the exhaust gas by contacting the exhaust gas with an absorption liquid. In addition, the exhaust gas discharge system 1 includes a reheater 15 provided between the desulfurization device 14 and the boost fan 3 in the exhaust gas discharge line 2, as shown in FIG. 1.

[0018] The boost fan 3 includes a rotor blade 31, an electric motor 32 configured to supply a driving force for rotating the rotor blade 31 to the rotor blade 31, and an opening adjustment unit 33 configured to adjust the opening of the rotor blade 31. By adjusting the opening of the rotor blade 31 with the opening adjustment unit 33, the amount of exhaust gas passing through the rotor blade 31 can be adjusted.

[0019] The induced draft fan 4 includes a rotor blade 41, an electric motor 42 configured to supply a driving force for rotating the rotor blade 41 to the rotor blade 41, and an opening adjustment unit 43 configured to adjust the opening of the rotor blade 41. By adjusting the opening of the rotor blade 41 with the opening adjustment unit 43, the amount of exhaust gas passing through the rotor blade 41 can be adjusted.

[0020] (Bypass line, bypass damper) In the illustrated embodiment, the exhaust gas discharge system 1 further includes a bypass line 16 and a bypass damper 17 provided in the bypass line 16, as shown in Fig. 1. The bypass line 16 branches off from the exhaust gas discharge line 2 between the induced draft fan 4 and the desulfurizer 14 in the exhaust gas discharge line 2, bypasses the desulfurizer 14, the reheater 15, and the boost fan 3, and is connected to a position between the boost fan 3 and the chimney 12 in the exhaust gas discharge line 2. The bypass damper 17 includes an opening / closing mechanism 171 for opening and closing the bypass line 16, and an opening adjustment unit 172 configured to adjust the opening degree of the opening / closing mechanism 171. The opening adjustment unit 172 controls the opening of the bypass damper 17 so that the pressure on the outlet side of the bypass damper 17 (for example, the measurement value of an outlet side pressure gauge 92 described later) is higher than the pressure on the inlet side of the bypass damper 17 (for example, the measurement value of an inlet side pressure gauge 91 described later) and so that the differential pressure between the inlet side pressure and the outlet side pressure of the bypass damper 17 is constant (for example, 10 mmAq). By controlling the opening of the bypass damper 17 by the opening adjustment unit 172, it is possible to prevent the exhaust gas from flowing from the inlet side to the outlet side of the bypass damper 17 without passing through the desulfurization device 14.

[0021] (2-system combustion equipment) 1, the exhaust gas emission system 1 is configured to purify exhaust gas discharged from two systems of combustion equipment 11 by one system of desulfurization equipment 14. Note that the present disclosure is also applicable to configurations other than the illustrated configuration, for example, a configuration including one system of combustion equipment 11 and one system of desulfurization equipment 14.

[0022] 1, the combustion equipment 11 includes a first combustion equipment 11A and a second combustion equipment 11B different from the first combustion equipment 11A. The exhaust gas discharge line 2 includes a first pipeline 2A for guiding the exhaust gas discharged from the first combustion equipment 11A to the downstream side, a second pipeline 2B for guiding the exhaust gas discharged from the second combustion equipment 11B to the downstream side, and a third pipeline 2C whose upstream side is connected to the downstream ends of the first pipeline 2A and the second pipeline 2B at a junction P1 and whose downstream side is connected to a desulfurization device 14.

[0023] The induced draft fan 4 includes a first induced draft fan 4A provided in the first pipeline 2A and a second induced draft fan 4B provided in the second pipeline 2B. The electrostatic precipitator 13 includes a first electrostatic precipitator 13A provided in the first pipeline 2A and a second electrostatic precipitator 13B provided in the second pipeline 2B. The exhaust gas discharged from the first combustion equipment 11A passes through the first pipeline 2A and the third pipeline 2C and is led to the desulfurization equipment 14. The exhaust gas discharged from the second combustion equipment 11B passes through the second pipeline 2B and the third pipeline 2C and is led to the desulfurization equipment 14.

[0024] In addition, in the embodiment shown in FIG. 1, the exhaust gas discharge line 2 includes a fourth pipeline 2D whose upstream side is connected to the desulfurization device 14, a fifth pipeline 2E and a sixth pipeline 2F whose upstream sides are connected to the downstream end of the fourth pipeline 2D at a branching point P2, and a seventh pipeline 2G whose upstream side is connected to the downstream ends of the fifth pipeline 2E and the sixth pipeline 2F at a junction P3 and whose downstream side is connected to the chimney 12.

[0025] The boost fan 3 includes a first boost fan 3A provided in the fifth pipe 2E and a second boost fan 3B provided in the sixth pipe 2F. The reheater 15 includes a first reheater 15A provided in the fifth pipe 2E and a second reheater 15B provided in the sixth pipe 2F. The exhaust gas purified by the desulfurization device 14 passes through either the fifth pipe 2E or the sixth pipe 2F, and is then guided to the chimney 12 through the seventh pipe 2G and discharged from the chimney 12 into the atmosphere. One side (upstream side) 161 of the bypass line 16 is connected to the third pipe 2C at the branch point P4, and the other side (downstream side) 162 is connected to the seventh pipe 2G at the junction P5.

[0026] (Boost Ventilator Control Method and Boost Ventilator Control Device) Fig. 2 is a flow diagram showing an example of a control method for a boost fan according to an embodiment of the present disclosure. Fig. 3 is an explanatory diagram for explaining a function of a control device for a boost fan according to an embodiment of the present disclosure. A control method 100 for the boost fan 3 according to some embodiments includes an operation information acquisition step S101, a control value determination step S102, a control value correction step S103, and a control step S104, as shown in Fig. 2. In the embodiment shown in Fig. 3, some steps in the control method 100 are performed by a control device 6 for the boost fan 3. As shown in Fig. 3, the control device 6 includes a database unit 61, a control value determination unit 62, a control value correction unit 63, and an opening control unit 64. Each of the control value determination unit 62, the control value correction unit 63, and the opening control unit 64 is configured to obtain necessary information from the database unit 61. Note that each step in the control method 100 may be performed using a device or equipment other than the control device 6, or may be performed manually.

[0027] The control device 6 is an electronic control unit for controlling the opening of the rotor blades 31 of the boost fan 3, and may be configured as a microcomputer including a CPU (processor) (not shown), memories such as ROM and RAM, storage devices such as an external storage device, an I / O interface, a communication interface, etc. Then, the CPU may operate (e.g., perform data calculations, etc.) according to instructions of a program loaded into the main storage device of the memory, for example, to realize each of the above-mentioned parts.

[0028] In the operation information acquisition step S101, operation information of the induced draft fan 4 is acquired. The operation information of the induced draft fan 4 is acquired continuously. Examples of the operation information of the induced draft fan 4 include the load of the induced draft fan 4 (e.g., the current value of the motor 42) and the opening degree of the rotor blades 41. Since the boost fan 3 controls the pressure in the furnace of the combustion equipment 11 located upstream of it, the operation state of the induced draft fan 4 changes depending on the pressure in the furnace of the combustion equipment 11. For this reason, the operation information of the induced draft fan 4 may include the pressure in the furnace of the combustion equipment 11.

[0029] 3, the control device 6 is configured to continuously receive operation information of the induced draft fan 4 as a signal through a wired or wireless communication line. The operation information of the induced draft fan 4 acquired by the control device 6 is stored in the database unit 61 together with time-series information.

[0030] In the control value determination step S102, the control value of the boost fan 3 is determined based on the operation information of the induced draft fan 4. Association information that associates the operation information of the induced draft fan 4 with the control value of the boost fan 3 is prepared before the control value determination step S102. The association information is stored in the database unit 61. By referring to the association information, the control value of the boost fan 3 corresponding to the operation information of the induced draft fan 4 acquired in the operation information acquisition step S101 can be acquired. The association information may be information that can use the operation information of the induced draft fan 4 as input information and output the control value of the boost fan 3 as output information, and includes lists, tables, maps, functions, machine learning models, etc. that show the correspondence between the input information and the output information. The association information can be obtained from past performance values, experimental values, numerical analysis results, etc.

[0031] The control value determination unit 62 is configured to determine a control value for the boost fan 3 based on the operation information of the induced draft fan 4. The control value determination unit 62 acquires the operation information and association information of the induced draft fan 4 from the database unit 61, and acquires a control value for the boost fan 3 as output information based on the association information, using the acquired operation information of the induced draft fan 4 as input information. The acquired control value is stored in the database unit 61 together with time-series information.

[0032] 3, the association information is formed of a function that uses as input information the sum of the load of the first induced draft fan 4A and the load of the second induced draft fan 4B and as output information the load of the boost fan 3. The control value determination unit 62 acquires, as a control value, the load of the boost fan 3 that corresponds to the acquired sum of the load of the first induced draft fan 4A and the load of the second induced draft fan 4B. In some other embodiments, the association information (for example, a function) may use the sum of the opening degree of the first induced draft fan 4A and the opening degree of the second induced draft fan 4B as input information, or the average value of the loads or the average value of the opening degrees of the two induced draft fans 4. The association information (for example, a function) may output the opening degree of the boost fan 3 as a control value, or may output each of the loads or opening degrees of the two boost fans 3 as a control value.

[0033] In control value correction step S103, the control value is corrected based on the deviation between a set value and a measured value of information 7 about the exhaust gas pressure downstream of the exhaust gas discharge line 2 from the induced draft fan 4. Examples of the information 7 about the exhaust gas pressure include the exhaust gas pressure at a point on the exhaust gas discharge line 2 downstream of the induced draft fan 4, and the exhaust gas pressure difference between two points on the exhaust gas discharge line 2 downstream of the induced draft fan 4. The set value of the information 7 about the exhaust gas pressure is obtained from past performance values, experimental values, numerical analysis results, etc.

[0034] The information 7 relating to the exhaust gas pressure is acquired continuously. In the embodiment shown in Fig. 3, the control device 6 is configured to continuously receive the information 7 relating to the exhaust gas pressure as a signal through a wired or wireless communication line. The information 7 relating to the exhaust gas pressure acquired by the control device 6 is stored in the database unit 61 together with time-series information. In addition, a set value of the information 7 relating to the exhaust gas pressure is stored in the database unit 61.

[0035] The control value correction unit 63 is configured to correct the control value based on the deviation between a set value and a measured value of information 7 about the pressure of the exhaust gas in the exhaust gas discharge line 2 downstream of the induced draft fan 4. In the embodiment shown in Fig. 3, the deviation between the measured value and the set value is calculated, and a correction control value for eliminating the deviation is calculated by proportional-integral processing of this deviation. The control value correction unit 63 then corrects the control value determined by the control value determination unit 62 by adding the correction control value.

[0036] In control step S104, the boost fan 3 is controlled using the control value corrected in control value correction step S103. As described below, the control value may be corrected or adjusted separately between control value correction step S103 and control step S104. The "control value corrected in control value correction step S103" includes a control value that has been corrected or adjusted separately after control value correction step S103. In control step S104, the boost fan 3 is controlled using the latest control value.

[0037] The opening control unit 64 is configured to continuously transmit the instructed opening corresponding to the latest control value to the boost fan 3 (3A and 3B) via a wired or wireless communication line. The opening adjustment unit 33 of the boost fan 3 adjusts the opening of the rotor blades 31 so that the instructed opening is the opening received from the opening control unit 64.

[0038] In the embodiment shown in FIG. 3, since the control value is the load of the boost fan 3, the load of the boost fan 3 is converted into the opening degree of the boost fan 3. When the control value is not the opening degree of the boost fan 3, the opening degree control unit 64 may include a conversion unit 641 that converts the control value into the opening degree of the boost fan 3 based on second association information that associates the control value with the opening degree of the boost fan 3. The second association information is prepared in advance before the control step S104. The second association information is stored in the database unit 61. The second association information may be information that uses the control value as input information and can output an instruction opening degree to the boost fan 3 as output information, and includes a list, table, map, function, machine learning model, etc. that show the correspondence between input information and output information. In addition, the association information can be obtained from past actual values, experimental values, numerical analysis results, etc. In this case, the conversion unit 641 refers to the second association information, and can obtain, from the latest control value, the opening degree of the boost fan 3 that corresponds to this control value.

[0039] 3, the opening control unit 64 may include a filter unit 642 that changes the opening instructed to the boost fan 3 to the maximum opening of the boost fan 3 when the opening instructed to the boost fan 3 exceeds the maximum opening of the boost fan 3. The boost fan 3 may include a positioner 34 configured to mechanically transmit a signal indicating the instructed opening from the opening control unit 64 to the opening adjustment unit 33.

[0040] As described above, the control method 100 for the boost fan 3 according to some embodiments includes an operation information acquisition step S101, a control value determination step S102, and a control value correction step S103, as shown in FIG.

[0041] According to the above method, in the control value determination step S102, the control value of the boost fan 3 is determined based on the operation information of the induced draft fan 4. By controlling using this control value, the opening degree of the boost fan 3 can be made to reflect the operation information of the induced draft fan 4. In addition, in the control value correction step S103, the control value is corrected based on the deviation between the set value and the measured value of the information 7 regarding the exhaust gas pressure downstream of the induced draft fan 4. Therefore, the corrected control value reflects the influence of the pressure fluctuation of the exhaust gas downstream of the induced draft fan 4. By controlling using this corrected control value, the opening degree of the boost fan 3 can be adjusted by feeding back the influence of the pressure fluctuation, so that the boost fan 3 can be maintained at an appropriate opening degree. By appropriately maintaining the opening degree of the boost fan 3, it is possible to suppress the decrease in the desulfurization efficiency in the desulfurization device 14 and the increase in the load of the boost fan 3.

[0042] As described above, the control method 100 for the boost fan 3 may further include a control step S104, as shown in Fig. 2. According to the above method, in the control step S104, the boost fan 3 is controlled using the corrected control value, so that the opening degree of the boost fan 3 can be adjusted by feeding back the influence of the pressure fluctuation of the exhaust gas downstream of the induced draft fan 4, and therefore the boost fan 3 can be maintained at an appropriate opening degree.

[0043] As described above, the control device 6 for the boost fan 3 according to some embodiments includes the control value determination unit 62, the control value correction unit 63, and the opening control unit 64, as shown in FIG.

[0044] According to the above configuration, the control value determination unit 62 determines the control value of the boost fan 3 based on the operation information of the induced draft fan 4. The opening control unit 64 performs control using this control value, so that the opening of the boost fan 3 can be made to reflect the operation information of the induced draft fan 4. The control value correction unit 63 corrects the control value based on the deviation between the set value and the measured value of the information 7 on the exhaust gas pressure downstream of the induced draft fan 4. Therefore, the control value corrected by the control value correction unit 63 reflects the influence of the pressure fluctuation of the exhaust gas downstream of the induced draft fan 4. The opening control unit 64 performs control using this corrected control value, so that the opening of the boost fan 3 can be adjusted by feeding back the influence of the pressure fluctuation, so that the boost fan 3 can be maintained at an appropriate opening. By appropriately maintaining the opening of the boost fan 3, it is possible to suppress a decrease in the desulfurization efficiency in the desulfurization device 14 and an increase in the load on the boost fan 3.

[0045] Fig. 4 is a flow diagram showing an example of a control method for a boost fan according to an embodiment of the present disclosure. Fig. 5 is an explanatory diagram for explaining a function of a control device for a boost fan according to an embodiment of the present disclosure. In some embodiments, the control method 100 for the boost fan 3 described above includes an operation information acquisition step S101, a control value determination step S102, a control value correction step S103, a control step S104, and a control value adjustment step S105 for adjusting the control value by adding, subtracting, multiplying, or dividing a predetermined bias value to the control value described above, as shown in Fig. 4. The control value adjustment step S105 may be performed before or after the control value correction step S103. Also, the control value adjustment step S105 may be performed before or after the control value correction step S103.

[0046] According to the above method, the control value can be adjusted by adding, subtracting, multiplying or dividing a predetermined bias value to the control value in the control value adjustment step S105. Therefore, the control value can be finely adjusted according to individual differences or circumstances in the exhaust gas discharge line 2, such as deterioration of the boost fan 3.

[0047] In some embodiments, the predetermined bias value used in the above-mentioned control value adjustment step S105 includes a deterioration value indicating the degree of deterioration of the boost fan 3. The control value adjustment step S105 includes a step S105A of adding, subtracting, multiplying, or dividing the deterioration value with respect to the control value, as shown in FIG.

[0048] In the embodiment shown in Fig. 4, the above step S105A is performed between the control value determination step S102 and the control value correction step S103. In the embodiment shown in Fig. 5, the above deterioration value is stored in advance in the database unit 61. The deterioration value may be created based on past operation data such as the relationship between the opening degree and the workload of the boost fan 3 stored in the database unit 61, or may be a value manually input such as a design value. The control device 6 further includes a first control value adjustment unit 65 that adds, subtracts, multiplies, and divides (adds in the illustrated example) the deterioration value to the control value determined by the control value determination unit 62.

[0049] According to the above method, by adding, subtracting, multiplying or dividing the deterioration value with respect to the control value (step S105A), the opening degree of the boost fan 3 can be made to correspond to the degree of deterioration of the boost fan 3 by control using this control value, so that the boost fan 3 can be maintained at an appropriate opening degree, and ultimately, a decrease in the desulfurization efficiency in the desulfurization device 14 and an increase in the load on the boost fan 3 can be suppressed.

[0050] In some embodiments, the predetermined bias value used in the above-mentioned control value adjustment step S105 includes at least one adjustment value for adjusting the machine difference of each boost fan 3. As shown in Fig. 4, the control value adjustment step S105 includes step S105B of adding, subtracting, multiplying or dividing the above adjustment value with respect to the control value. The machine difference of the boost fan 3 may include not only a difference arising from the state of the boost fan 3 itself (e.g., machine performance such as maximum output) but also a difference arising from the installation state of the boost fan 3 (e.g., piping length to the chimney 12, etc.).

[0051] In the embodiment shown in FIG. 4, the step S105B is performed between the control value correction step S103 and the control step S104. In the embodiment shown in FIG. 5, the adjustment value is stored in the database unit 61 in advance. The adjustment value may be created based on past operation data such as the relationship between the opening degree and the work amount of the boost fan 3 stored in the database unit 61, or may be a value manually input, such as a design value. The control device 6 further includes a second control value adjustment unit 66 that adds, subtracts, multiplies, or divides the adjustment value to the control value corrected by the control value correction unit 63. In the illustrated example, the second control value adjustment unit 66 adds one adjustment value to the corrected control value of the first boost fan 3A, and subtracts the one adjustment value from the corrected control value of the second boost fan 3B. The second control value adjustment unit 66 may prepare a separate adjustment value for each boost fan 3, and add, subtract, multiply, or divide the prepared adjustment value for each boost fan 3.

[0052] According to the above method, by adding, subtracting, multiplying or dividing the adjustment value by the control value (step S105B), the opening degree can be adjusted to an appropriate degree for each boost fan 3 by using this control value for control. This allows each boost fan 3 to maintain an appropriate opening degree, thereby suppressing a decrease in the desulfurization efficiency in the desulfurization device 14 and an increase in the load on the boost fan 3.

[0053] In some embodiments, the above-mentioned pressure-related information 7 includes either the inlet pressure or the outlet pressure of the desulfurization device 14 provided between the induced draft fan 4 and the boost fan 3 in the exhaust gas discharge line 2, or the outlet pressure of the reheater 15 provided between the desulfurization device 14 and the boost fan 3 in the exhaust gas discharge line 2.

[0054] As shown in FIG. 1, the inlet pressure of the desulfurizer 14 may be measured by an inlet pressure gauge 71 that measures the pressure of the exhaust gas downstream of the third pipe 2C from the branch point P4. The outlet pressure of the desulfurizer 14 may be measured by an outlet pressure gauge 72 that measures the pressure of the exhaust gas in the fourth pipe 2D. The outlet pressure of the reheater 15 may be measured by an outlet pressure gauge 74 that measures the pressure of the exhaust gas between the first reheater 15A and the boost fan 3A in the fifth pipe 2E, for example. In some other embodiments, the inlet pressure of the chimney 12 may be used as the information 7 related to pressure. The inlet pressure of the chimney 12 may be measured by an inlet pressure gauge that measures the pressure downstream of the seventh pipe 2G from the junction P5, as shown in FIG. 1.

[0055] According to the above method, by using the exhaust gas pressure downstream of the induced draft fan 4 in the exhaust gas discharge line 2 as the information 7 regarding the pressure, the influence of the fluctuation in the exhaust gas pressure downstream of the induced draft fan 4 in the exhaust gas discharge line 2 can be appropriately reflected in the control value of the boost fan 3. This allows the boost fan 3 to maintain an appropriate opening degree. Furthermore, since the exhaust gas pressure or differential pressure in the bypass line 16 is not used as the information 7 regarding the pressure, the boost fan 3 can maintain an appropriate opening degree by the above control even in a plant in which the bypass line 16 is blocked or removed or in a plant that does not have a bypass line 16.

[0056] In some embodiments, the above-mentioned pressure information 7 includes any one of the differential pressure between the inlet pressure and the outlet pressure of the desulfurization device 14 provided between the induced draft fan 4 and the boost fan 3 in the exhaust gas discharge line 2, the differential pressure between the inlet pressure and the outlet pressure of the reheater 15 provided between the desulfurization device 14 and the boost fan 3 in the exhaust gas discharge line 2, the differential pressure between the inlet pressure of the desulfurization device 14 and the outlet pressure of the reheater 15, or the differential pressure between the inlet pressure of the chimney 12 provided downstream of the reheater 15 in the exhaust gas discharge line 2 and the inlet pressure of the desulfurization device 14.

[0057] These pressure differences may be measured by a differential pressure gauge measuring the two target points, or a pressure gauge may be provided at each of the two target points, and the pressure difference may be obtained from the measurements of the two pressure gauges. For example, the pressure difference between the inlet pressure and the outlet pressure of the reheater 15 may be calculated from the measurement value of the inlet pressure gauge 73 that measures the pressure upstream of the first reheater 15A on the fifth pipe 2E, and the measurement value of the outlet pressure gauge 74 described above.

[0058] According to the above method, by adopting the differential pressure of the exhaust gas downstream of the exhaust gas discharge line 2 from the induced draft fan 4 as the information 7 regarding the pressure, the influence of the pressure fluctuation of the exhaust gas downstream of the exhaust gas discharge line 2 from the induced draft fan 4 can be appropriately reflected in the control value of the boost fan 3. This allows the boost fan 3 to maintain an appropriate opening degree. Also, the pressure loss in the section where the differential pressure is acquired can be grasped. Also, since the pressure or differential pressure of the exhaust gas in the bypass line 16 is not adopted as the information 7 regarding the pressure, the boost fan 3 can maintain an appropriate opening degree by the above control even in a plant where the bypass line 16 is blocked or removed or in a plant that does not have a bypass line 16.

[0059] In some of the above-mentioned embodiments, the pressure or differential pressure of the exhaust gas in the bypass line 16 is not used as information for controlling the boost fan 3 (for example, the information 7 on the pressure). In this case, the bypass line 16 can be blocked or removed. By blocking or removing the bypass line 16, the cost of maintaining the bypass line 16 and the bypass damper 17 can be eliminated, and the cost of operating the exhaust gas emission system can be reduced. In addition, generally, as a measure to prevent the exhaust gas from flowing from one side 161 to the other side 162 of the bypass line 16, the opening degree of the boost fan 3 is adjusted to maintain the pressure on the outlet side of the bypass damper 17 in the bypass line 16 higher than the pressure on the inlet side. By blocking or removing the bypass line 16, the above control becomes unnecessary, and the control of the boost fan 3 can be simplified.

[0060] 1, the pressure on the inlet side of the bypass damper 17 may be measured by an inlet side pressure gauge 91 provided near the inlet of the bypass damper 17, and the pressure on the outlet side of the bypass damper 17 may be measured by an outlet side pressure gauge 92 provided near the outlet of the bypass damper 17. Furthermore, if the pressure on the inlet side or the outlet side of the bypass damper 17, or the differential pressure between the pressure on the inlet side and the pressure on the outlet side has been used to control the boost fan 3 in the past, the above-mentioned association information may be created based on the operation data (including, for example, the measurement results of the inlet side pressure gauge 91 and the outlet side pressure gauge 92, the opening degree of the boost fan 3 associated with the measurement results in time series, and the operation information of the induced draft fan 4), and the created association information may be used to control the opening degree of the boost fan 3.

[0061] In some embodiments, the operation information of the induced draft fan 4 used in the above-mentioned control value determination step S102 includes either the load or the opening degree of the induced draft fan 4. According to the above-mentioned method, the control value of the boost fan 3 reflects the load and the opening degree of the induced draft fan 4. As a result, by control using this control value, the opening degree of the boost fan 3 can be made to correspond to the load fluctuation and the opening degree fluctuation of the induced draft fan 4, so that the boost fan 3 can maintain an appropriate opening degree, and thus a decrease in the desulfurization efficiency in the desulfurization device 14 and an increase in the load on the boost fan 3 can be suppressed.

[0062] It is possible to configure each process executed by the control device 6 in the above embodiment to be executed by an information processing device 8 (see Figure 6 described later) connected so as to be able to communicate with the control device 6 in a cloud environment or via a VPN.

[0063] Fig. 6 is a schematic diagram of an exhaust gas discharge system including a boost fan that is a control target in a control method for a boost fan according to an embodiment of the present disclosure, and an information processing system. Fig. 7 and Fig. 8 are explanatory diagrams for explaining functions of an information processing device according to an embodiment of the present disclosure. As shown in Fig. 6, an information processing system 10 according to some embodiments includes the information processing device 8 and a terminal 9 connected to the information processing device 8 so as to be able to communicate with the information processing device 8.

[0064] In this case, as shown in Figure 7, the information processing device 8 is equipped with a data transceiver unit 81 that receives, via the control device 6, information 7 relating to the operation information of the induced draft fan 4 and the exhaust gas pressure downstream of the induced draft fan 4 in the exhaust gas discharge line 2, a database unit 61, a control value determination unit 62, and a control value correction unit 63, and the opening degree of the boost fan 3 may be adjusted by communicating the control value determined by the control value determination unit 62 or the control value corrected by the control value correction unit 63 based on the various information received by the data transceiver unit 81 to the opening degree control unit 64 in the control device 6 via the data transceiver unit 81.

[0065] In particular, when calculations are performed in a cloud environment, from the viewpoint of security, the control value of the boost fan 3 may not be directly controlled but may be displayed only. For example, an operation index diagram generated in a cloud environment may be transmitted and displayed on a customer-owned device (terminal 9, see Fig. 6) via a dedicated app, and the customer may manually update the local operation index diagram.

[0066] As shown in FIG. 8, the information processing device 8 may also include a first control value adjustment unit 65 and a second control value adjustment unit 66, and the control value adjusted by the adjustment value in the second control value adjustment unit 66 may be communicated to the opening control unit 64 in the control device 6 via the data transmission / reception unit 81, thereby adjusting the opening of the boost fan 3.

[0067] Moreover, the information processing device 8 shown in Figs. 7 and 8 may also include an opening control unit 64, and may adjust the opening of the boost fan 3 remotely.

[0068] Furthermore, the information processing device 8 may be configured to execute each process in response to a request from the terminal 9.

[0069] The present disclosure is not limited to the above-described embodiments, and includes modifications to the above-described embodiments and appropriate combinations of these modifications.

[0070] The contents described in the above-mentioned embodiments can be understood, for example, as follows.

[0071] 1) A method (100) for controlling a boost fan (3) according to at least one embodiment of the present disclosure includes: A method (100) for controlling a booster fan (3) provided in an exhaust gas exhaust line (2) for discharging exhaust gas discharged from a combustion facility (11), comprising the steps of: an operation information acquisition step (S101) of acquiring operation information of an induced draft fan (4) provided upstream of the boost fan (3) in the exhaust gas discharge line (2); a control value determination step (S102) of determining a control value for the boost fan (3) based on the operation information of the induced draft fan (4); and a control value correction step (S103) of correcting the control value based on a deviation between a set value and a measured value of information (7) relating to the pressure of the exhaust gas downstream of the exhaust gas discharge line (2) from the induced draft fan (4).

[0072] According to the method 1), in the control value determination step (S102), a control value of the boost fan (3) is determined based on the operation information of the induced draft fan (4). By controlling using this control value, the opening degree of the boost fan (3) can be made to reflect the operation information of the induced draft fan (4). In addition, in the control value correction step (S103), the control value is corrected based on the deviation between the set value and the measured value of the information (7) related to the exhaust gas pressure downstream of the induced draft fan (4). Therefore, the corrected control value reflects the influence of the pressure fluctuation of the exhaust gas downstream of the induced draft fan (4). By controlling using this corrected control value, the opening degree of the boost fan (3) can be adjusted by feeding back the influence of the pressure fluctuation, so that the boost fan (3) can be maintained at an appropriate opening degree. By appropriately maintaining the opening degree of the boost fan (3), it is possible to suppress a decrease in the desulfurization efficiency in the desulfurization device (14) and an increase in the load on the boost fan (3).

[0073] 2) In some embodiments, there is provided a control method (100) for the boost fan (3) according to 1), comprising the steps of: The method further includes a control step (S104) of controlling the boost fan (3) using the control value corrected in the control value correction step (S103).

[0074] According to the above method 2), in the control step (S104), the boost fan (3) is controlled using the corrected control value, whereby the opening degree of the boost fan (3) can be adjusted by feeding back the influence of the pressure fluctuation of the exhaust gas downstream of the induced draft fan (4). Therefore, the boost fan (3) can be maintained at an appropriate opening degree.

[0075] 3) In some embodiments, there is provided a control method (100) for the boost fan (3) according to 1) or 2), comprising: The method further includes a control value adjustment step (S105) of adjusting the control value by adding, subtracting, multiplying or dividing the control value by a predetermined bias value.

[0076] According to the above method 3), in the control value adjustment step (S105), the control value can be adjusted by adding, subtracting, multiplying or dividing a predetermined bias value to the control value. Therefore, the control value can be finely adjusted according to individual differences or circumstances in the exhaust gas discharge line (2), such as deterioration of the boost fan (3).

[0077] 4) In some embodiments, there is provided a control method (100) for the boost fan (3) according to any one of 1) to 3), comprising the steps of: The pressure information (7) is The pressure sensor includes any one of the inlet pressure or outlet pressure of a desulfurization device (14) provided between the induced draft fan (4) and the boost fan (3) in the exhaust gas discharge line (2), or the outlet pressure of a reheater (15) provided between the desulfurization device (14) and the boost fan (3) in the exhaust gas discharge line (2).

[0078] According to the method of 4), by using the exhaust gas pressure downstream of the induced draft fan (4) in the exhaust gas discharge line (2) as the information (7) on the pressure, the influence of the fluctuation in the exhaust gas pressure downstream of the induced draft fan (4) in the exhaust gas discharge line (2) can be appropriately reflected in the control value of the boost fan (3). This allows the boost fan (3) to maintain an appropriate opening degree. In addition, since the exhaust gas pressure or the differential pressure in the bypass line (16) is not used as the information (7) on the pressure, the boost fan (3) can maintain an appropriate opening degree by the above control even in a plant in which the bypass line (16) is blocked or removed or in a plant that does not have a bypass line (16).

[0079] 5) In some embodiments, there is provided a control method (100) for the boost fan (3) according to any one of 1) to 3), comprising the steps of: The pressure information (7) is The pressure difference includes any one of the pressure difference between the inlet pressure and the outlet pressure of a desulfurization device (14) provided between the induced draft fan (4) and the boost fan (3) in the exhaust gas discharge line (2), the pressure difference between the inlet pressure and the outlet pressure of a reheater (15) provided between the desulfurization device (14) and the boost fan (3) in the exhaust gas discharge line (2), the pressure difference between the inlet pressure of the desulfurization device (14) and the outlet pressure of the reheater (15), or the pressure difference between the inlet pressure of a chimney (12) provided downstream of the reheater (15) in the exhaust gas discharge line and the inlet pressure of the desulfurization device (14).

[0080] According to the method of 5) above, by using the differential pressure of the exhaust gas downstream of the induced draft fan (4) in the exhaust gas discharge line (2) as the information on pressure (7), the influence of the pressure fluctuation of the exhaust gas downstream of the induced draft fan (4) in the exhaust gas discharge line (2) can be appropriately reflected in the control value of the boost fan (3). This allows the boost fan (3) to maintain an appropriate opening degree. In addition, the pressure loss in the section where the differential pressure is acquired can be grasped. In addition, since the pressure or differential pressure of the exhaust gas in the bypass line (16) is not used as the information on pressure (7), the boost fan (3) can maintain an appropriate opening degree by the above control even in a plant where the bypass line (16) is blocked or removed or in a plant that does not have a bypass line (16).

[0081] 6) In some embodiments, there is provided a control method (100) for the boost fan (3) according to any one of 1) to 5) above, comprising: The operation information of the induced draft fan (4) includes either the load or the opening degree of the induced draft fan (4).

[0082] According to the above method 6), the control value of the boost fan (3) reflects the load and the opening of the induced draft fan (4). Thus, by controlling using this control value, the opening of the boost fan (3) can be made to correspond to the load fluctuation and the opening fluctuation of the induced draft fan (4), so that the boost fan (3) can maintain an appropriate opening, and thus, a decrease in the desulfurization efficiency in the desulfurization device (14) and an increase in the load of the boost fan (3) can be suppressed.

[0083] 7) In some embodiments, there is provided a control method (100) for the boost fan (3) described in 3) above, comprising: The predetermined bias value includes a deterioration coefficient indicating a degree of deterioration of the boost fan (3), The control value adjusting step (S105) includes a step (S105A) of multiplying the control value by the deterioration coefficient.

[0084] According to the above method 7), by multiplying the control value by the deterioration coefficient (step S105A), the opening degree of the boost fan (3) can be made to correspond to the degree of deterioration of the boost fan (3) by control using this control value. Therefore, the boost fan (3) can be maintained at an appropriate opening degree, and thus a decrease in the desulfurization efficiency in the desulfurization device (14) and an increase in the load on the boost fan (3) can be suppressed.

[0085] 8) The control device (6) for a boost fan according to at least one embodiment of the present disclosure comprises: A control device (6) for a booster fan (3) provided in an exhaust gas exhaust line (2) for discharging exhaust gas discharged from a combustion facility (11), comprising: a control value determination unit (62) configured to determine a control value for the boost fan (3) based on operation information of an induced draft fan (4) provided upstream of the boost fan (3) in the exhaust gas discharge line (2); and a control value correction unit (63) configured to correct the control value based on a deviation between a set value and a measured value of information (7) relating to the pressure of the exhaust gas in the exhaust gas discharge line (2) downstream of the induced draft fan (4); and an opening control unit (64) that controls the opening of the boost fan (3) based on the control value corrected in the control value correction unit (63).

[0086] According to the above configuration 8), the control value determination unit (62) determines a control value for the boost fan (3) based on the operation information of the induced draft fan (4). The opening control unit (64) performs control using this control value, so that the opening of the boost fan (3) can be adjusted to reflect the operation information of the induced draft fan (4). The control value correction unit (63) corrects the control value based on the deviation between a set value and a measured value of the information (7) related to the exhaust gas pressure downstream of the induced draft fan (4). Therefore, the control value corrected by the control value correction unit (63) reflects the influence of the pressure fluctuation of the exhaust gas downstream of the induced draft fan (4). The control using the corrected control value performed by the opening control unit (64) can adjust the opening of the boost fan (3) by feeding back the influence of the pressure fluctuation, so that the boost fan (3) can be maintained at an appropriate opening. By appropriately maintaining the opening degree of the boost fan (3), it is possible to suppress a decrease in the desulfurization efficiency in the desulfurization device (14) and an increase in the load on the boost fan (3).

[0087] 9) An information processing device (8) according to at least one embodiment of the present disclosure, An information processing device (8) for executing processing related to a control method for a booster fan (3) provided in an exhaust gas exhaust line (2) for exhausting exhaust gas discharged from a combustion facility (11), a control value determination unit (62) configured to determine a control value for the boost fan (3) based on operation information of an induced draft fan (4) provided upstream of the boost fan (3) in the exhaust gas discharge line (2); and and a control value correction unit (63) configured to correct the control value based on a deviation between a set value and a measured value of information (7) relating to the exhaust gas pressure in the exhaust gas discharge line (2) downstream of the induced draft fan (4).

[0088] According to the above configuration 9), by performing control using the control value determined by the control value determination unit (62) of the information processing device (8) or the control value corrected by the control value correction unit (63) of the information processing device (8), it is possible to execute processing related to adjustment of the opening degree of the boost fan (3) even from the information processing device (8) located remotely from the boost fan (3).

[0089] 10) An information processing system (10) according to at least one embodiment of the present disclosure, An information processing system (10) including: an information processing device (8) that executes processing related to a control method for a booster fan (3) that is provided in an exhaust gas exhaust line (2) for exhausting exhaust gas discharged from a combustion facility (11); and a terminal (9) that is connected to the information processing device (8) so as to be able to communicate with the information processing device, a control value determination unit (62) configured to determine a control value for the boost fan (3) based on operation information of an induced draft fan (4) provided upstream of the boost fan (3) in the exhaust gas discharge line (2) in response to a request from the terminal (9); and and a control value correction unit (63) configured to correct the control value based on a deviation between a set value and a measured value of information (7) relating to the exhaust gas pressure in the exhaust gas discharge line (2) downstream of the induced draft fan (62).

[0090] According to the above configuration 10), by performing control using the control value determined by the control value determination unit (62) of the information processing device (8) or the control value corrected by the control value correction unit (63) of the information processing device (8) in response to a request from the terminal (9), it is possible to execute processing related to adjustment of the opening degree of the boost fan (3) even from the terminal (9) located remotely from the boost fan (3).

[0091] 11) A control method for an information processing system (10) according to at least one embodiment of the present disclosure, A control method for an information processing system (10) including an information processing device (8) that executes processing related to control of a booster fan (3) provided in an exhaust gas exhaust line (2) for exhausting exhaust gas discharged from a combustion facility (11), and a terminal (9) connected to the information processing device (8) so as to be able to communicate with the information processing device, The information processing device (8) a control value determination step (S102) configured to determine a control value for the boost fan (3) based on operation information of an induced draft fan (4) provided upstream of the boost fan (3) in the exhaust gas discharge line (2) in response to a request from the terminal (9); and a control value correction step (S103) configured to correct the control value based on a deviation between a set value and a measured value of information (7) relating to the exhaust gas pressure in the exhaust gas discharge line (2) downstream of the induced draft fan (62).

[0092] According to the method of 11) above, in response to a request from the terminal (9), the information processing device (8) determines a control value for the boost fan (3) based on the operation information of the induced draft fan (4) (control value determination step S102). Also, in the information processing device (8), the control value is corrected based on the deviation between a set value and a measured value of the information (7) related to the exhaust gas pressure downstream of the induced draft fan (4) (control value correction step S103). By performing control using the control value determined by the information processing device (8) in response to a request from the terminal (9) or the control value corrected by the information processing device (8), it is possible to execute the process related to the adjustment of the opening degree of the boost fan (3) even from the terminal (9) located remotely from the boost fan (3). [Explanation of symbols]

[0093] 1 Exhaust gas emission system 2 Exhaust gas exhaust line 2A~2G 1st~7th pipeline 3 Booster fan 3A 1st booster fan 3B Second booster fan 31 Moving blade 32 Electric motor 33 Opening adjustment part 34 Positioner 4. Induced draft fan 4A First induced draft fan 4B Second induced draft fan 41 Moving blade 42 Electric motor 43 Opening adjustment part 6. Control device 61 Database Department 62 Control value determination unit 63 Control value correction unit 64 Opening control section 641 Conversion unit 642 Filter section 65 First control value adjustment unit 66 Second control value adjustment unit 7 Pressure Information 71, 73, 91 Inlet pressure gauge 72, 74, 92 Outlet pressure gauge 8. Information processing equipment 81 Data transmission / reception unit 9 Terminal 10. Information Processing Systems 11 Combustion equipment 11A First Combustion Facility 11B Second Combustion Facility 12 Chimney 13 Electrostatic Precipitator 13A First electrostatic precipitator 13B Second electrostatic precipitator 14 Desulfurization equipment 15 Reheater 15A First Reheater 15B Second Reheater 16 Bypass Line 161 One side 162 Other side 17 Bypass damper 171 Opening and closing mechanism 172 Opening adjustment part 100 Control Method P1,P3,P5 Confluence P2, P4 branch S101 Driving information acquisition step S102 Control value determination step S103 Control value correction step S104 Control step S105 Control value adjustment step

Claims

1. A method for controlling a booster fan provided in an exhaust gas exhaust line for exhausting exhaust gas discharged from a combustion facility, comprising: an operation information acquisition step of acquiring operation information of an induced draft fan provided upstream of the exhaust gas discharge line relative to the boost fan; a control value determination step of determining a control value for the boost fan based on the operation information of the induced draft fan; a control value correction step of correcting the control value based on a deviation between a set value and a measured value of information regarding the pressure of the exhaust gas downstream of the induced draft fan in the exhaust gas discharge line, The information regarding the pressure may include The inlet pressure or outlet pressure of a desulfurization device provided between the induced draft fan and the boost fan in the exhaust gas discharge line, or the outlet pressure of a reheater provided between the desulfurization device and the boost fan in the exhaust gas discharge line, A method for controlling a boost fan.

2. A method for controlling a booster fan provided in an exhaust gas exhaust line for discharging exhaust gas discharged from a combustion facility, comprising: an operation information acquisition step of acquiring operation information of an induced draft fan provided upstream of the exhaust gas discharge line relative to the boost fan; a control value determination step of determining a control value for the boost fan based on the operation information of the induced draft fan; and a control value correction step of correcting the control value based on a deviation between a set value and a measured value of information regarding the pressure of the exhaust gas downstream of the induced draft fan in the exhaust gas discharge line, The information regarding the pressure may include The pressure difference between the inlet pressure and the outlet pressure of a desulfurization device provided between the induced draft fan and the boost fan in the exhaust gas discharge line, the pressure difference between the inlet pressure and the outlet pressure of a reheater provided between the desulfurization device and the boost fan in the exhaust gas discharge line, the pressure difference between the inlet pressure of the desulfurization device and the outlet pressure of the reheater, or the pressure difference between the inlet pressure of a chimney provided downstream of the reheater in the exhaust gas discharge line and the inlet pressure of the desulfurization device. A method for controlling a booster fan.

3. The control value correction step further includes a control step of controlling the boost fan using the corrected control value. A method for controlling a boost fan according to claim 1 or 2.

4. The control value may further include a control value adjustment step of adjusting the control value by adding, subtracting, multiplying or dividing a predetermined bias value to the control value. A method for controlling a boost fan according to any one of claims 1 to 3.

5. The operation information of the induced draft fan includes either a load or an opening degree of the induced draft fan. A method for controlling a boost fan according to any one of claims 1 to 4.

6. The predetermined bias value includes a deterioration value indicating a degree of deterioration of the boost fan, The control value adjustment step includes a step of performing addition, subtraction, multiplication, and division of the deterioration value on the control value. A method for controlling a boost fan according to claim 4.

7. A control device for a booster fan provided in an exhaust gas exhaust line for exhausting exhaust gas discharged from a combustion facility, a control value determination unit configured to determine a control value of the boost fan based on operation information of an induced draft fan provided upstream of the boost fan in the exhaust gas discharge line; a control value correction unit configured to correct the control value based on a deviation between a set value and a measured value of information regarding the pressure of the exhaust gas in the exhaust gas discharge line downstream of the induced draft fan; an opening control unit that controls an opening of the boost fan based on the control value corrected by the control value correction unit, The information regarding the pressure may include The inlet pressure or outlet pressure of a desulfurization device provided between the induced draft fan and the boost fan in the exhaust gas discharge line, or the outlet pressure of a reheater provided between the desulfurization device and the boost fan in the exhaust gas discharge line, Booster fan control device.

8. A control device for a booster fan provided in an exhaust gas exhaust line for discharging exhaust gas discharged from a combustion facility, a control value determination unit configured to determine a control value of the boost fan based on operation information of an induced draft fan provided upstream of the boost fan in the exhaust gas discharge line; a control value correction unit configured to correct the control value based on a deviation between a set value and a measured value of information regarding the pressure of the exhaust gas in the exhaust gas discharge line downstream of the induced draft fan; an opening control unit that controls an opening of the boost fan based on the control value corrected by the control value correction unit, The information regarding the pressure may include The pressure difference between the inlet pressure and the outlet pressure of a desulfurization device provided between the induced draft fan and the boost fan in the exhaust gas discharge line, the pressure difference between the inlet pressure and the outlet pressure of a reheater provided between the desulfurization device and the boost fan in the exhaust gas discharge line, the pressure difference between the inlet pressure of the desulfurization device and the outlet pressure of the reheater, or the pressure difference between the inlet pressure of a chimney provided downstream of the reheater in the exhaust gas discharge line and the inlet pressure of the desulfurization device. Booster fan control device.

9. An information processing device that executes processing related to a control method for a booster fan provided in an exhaust gas exhaust line for discharging exhaust gas discharged from a combustion facility, a control value determination unit configured to determine a control value of the boost fan based on operation information of an induced draft fan provided upstream of the boost fan in the exhaust gas discharge line; a control value correction unit configured to correct the control value based on a deviation between a set value and a measured value of information regarding the pressure of the exhaust gas in the exhaust gas discharge line downstream of the induced draft fan, The information regarding the pressure may include The inlet pressure or outlet pressure of a desulfurization device provided between the induced draft fan and the boost fan in the exhaust gas discharge line, or the outlet pressure of a reheater provided between the desulfurization device and the boost fan in the exhaust gas discharge line, Information processing device.

10. An information processing device that executes processing related to a control method for a booster fan provided in an exhaust gas exhaust line for discharging exhaust gas discharged from a combustion facility, a control value determination unit configured to determine a control value of the boost fan based on operation information of an induced draft fan provided upstream of the boost fan in the exhaust gas discharge line; a control value correction unit configured to correct the control value based on a deviation between a set value and a measured value of information regarding the pressure of the exhaust gas in the exhaust gas discharge line downstream of the induced draft fan, The information regarding the pressure may include The pressure difference between the inlet pressure and the outlet pressure of a desulfurization device provided between the induced draft fan and the boost fan in the exhaust gas discharge line, the pressure difference between the inlet pressure and the outlet pressure of a reheater provided between the desulfurization device and the boost fan in the exhaust gas discharge line, the pressure difference between the inlet pressure of the desulfurization device and the outlet pressure of the reheater, or the pressure difference between the inlet pressure of a chimney provided downstream of the reheater in the exhaust gas discharge line and the inlet pressure of the desulfurization device. Information processing device.

11. An information processing system including an information processing device that executes processing related to a control method for a booster fan provided in an exhaust gas exhaust line for exhausting exhaust gas discharged from a combustion facility, and a terminal connected to be able to communicate with the information processing device, a control value determination unit configured to determine a control value of the boost fan based on operation information of an induced draft fan provided upstream of the boost fan in the exhaust gas discharge line in response to a request from the terminal; a control value correction unit configured to correct the control value based on a deviation between a set value and a measured value of information regarding the pressure of the exhaust gas in the exhaust gas discharge line downstream of the induced draft fan, The information regarding the pressure may include The inlet pressure or outlet pressure of a desulfurization device provided between the induced draft fan and the boost fan in the exhaust gas discharge line, or the outlet pressure of a reheater provided between the desulfurization device and the boost fan in the exhaust gas discharge line, Information processing system.

12. An information processing system comprising: an information processing device that executes processing related to a control method for a booster fan that is provided in an exhaust gas exhaust line for discharging exhaust gas discharged from a combustion facility; and a terminal connected so as to be able to communicate with the information processing device, a control value determination unit configured to determine a control value of the boost fan based on operation information of an induced draft fan provided upstream of the boost fan in the exhaust gas discharge line in response to a request from the terminal; a control value correction unit configured to correct the control value based on a deviation between a set value and a measured value of information regarding the pressure of the exhaust gas in the exhaust gas discharge line downstream of the induced draft fan, The information regarding the pressure may include The pressure difference between the inlet pressure and the outlet pressure of a desulfurization device provided between the induced draft fan and the boost fan in the exhaust gas discharge line, the pressure difference between the inlet pressure and the outlet pressure of a reheater provided between the desulfurization device and the boost fan in the exhaust gas discharge line, the pressure difference between the inlet pressure of the desulfurization device and the outlet pressure of the reheater, or the pressure difference between the inlet pressure of a chimney provided downstream of the reheater in the exhaust gas discharge line and the inlet pressure of the desulfurization device. Information processing system.

13. A control method for an information processing system including an information processing device that executes processing related to control of a booster fan provided in an exhaust gas exhaust line for exhausting exhaust gas discharged from a combustion facility, and a terminal connected so as to be able to communicate with the information processing device, The information processing device includes: a control value determination step configured to determine a control value of the boost fan based on operation information of an induced draft fan provided upstream of the boost fan in the exhaust gas discharge line in response to a request from the terminal; a control value correction step configured to correct the control value based on a deviation between a set value and a measured value of information regarding the pressure of the exhaust gas in the exhaust gas discharge line downstream of the induced draft fan, The information regarding the pressure may include The inlet pressure or outlet pressure of a desulfurization device provided between the induced draft fan and the boost fan in the exhaust gas discharge line, or the outlet pressure of a reheater provided between the desulfurization device and the boost fan in the exhaust gas discharge line, A method for controlling an information processing system.

14. A control method for an information processing system comprising an information processing device that executes processing related to control of a booster fan provided in an exhaust gas exhaust line for discharging exhaust gas discharged from a combustion facility, and a terminal connected so as to be able to communicate with the information processing device, The information processing device includes: a control value determination step configured to determine a control value of the boost fan based on operation information of an induced draft fan provided upstream of the boost fan in the exhaust gas discharge line in response to a request from the terminal; a control value correction step configured to correct the control value based on a deviation between a set value and a measured value of information regarding the pressure of the exhaust gas in the exhaust gas discharge line downstream of the induced draft fan, The information regarding the pressure may include The pressure difference between the inlet pressure and the outlet pressure of a desulfurization device provided between the induced draft fan and the boost fan in the exhaust gas discharge line, the pressure difference between the inlet pressure and the outlet pressure of a reheater provided between the desulfurization device and the boost fan in the exhaust gas discharge line, the pressure difference between the inlet pressure of the desulfurization device and the outlet pressure of the reheater, or the pressure difference between the inlet pressure of a chimney provided downstream of the reheater in the exhaust gas discharge line and the inlet pressure of the desulfurization device. A method for controlling an information processing system.

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