Measurement device and method for measuring unreacted powder, and recovery system.

Abstract

To improve the measurement accuracy of unreacted powders such as char. [Solution] The char measuring device 55 is applied to a recovery system that includes a recovery device for recovering char from the generated gas output from a gasifier, and a char supply pipe for supplying char from the recovery device to the gasifier. The recovery device includes a plurality of recovery containers for storing char. The char measuring device 55 includes a data acquisition unit 31 for acquiring the total weight of the plurality of recovery containers, a supply amount calculation unit 33 for calculating the amount of char supplied to the gasifier, and a recovery amount calculation unit 32 for calculating the amount of char recovered using the time change in the total weight of the plurality of recovery containers and the amount of char supplied to the gasifier.

Description

Technical Field

[0001] The present disclosure relates to an unreacted powder measuring device, a measuring method thereof, and a recovery system.

Background Art

[0002] Conventionally, as a gasification furnace, a carbon-containing fuel gasification facility that generates combustible gas by supplying a carbon-containing solid fuel such as coal into the gasification furnace and partially burning and gasifying the carbon-containing solid fuel is known.

[0003] The carbon-containing fuel gasification facility includes, for example, a carbonaceous raw material supply device, a gasification furnace, a char recovery device, etc. The carbonaceous raw material is supplied to the gasification furnace by a carrier gas such as nitrogen, and a gasifying agent (e.g., air, oxygen-enriched air, oxygen, steam, etc.) is supplied. The carbonaceous raw material is burned and gasified in the gasification furnace to generate a product gas (combustible gas). Then, in the char recovery device, unreacted carbonaceous raw material (char) is removed from the product gas generated in the gasification furnace.

[0004] In the char recovery device, for example, char contained in the product gas generated in the gasification furnace is removed using a multi-stage dust collector. And the recovered char is returned to the gasification furnace in predetermined amounts by a char supply device.

[0005] When recovering the char and reintroducing it into the gasification furnace, in order to stably operate the gasification furnace and also to control the operation so that the amount of char recovered and the amount of char supplied are substantially balanced, it is necessary to measure the amount of char recovered and the amount of char supplied. For example, Patent Document 1 discloses a method of measuring the volume of char using a level meter using γ-rays.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

[0007] However, the char measurement method disclosed in Patent Document 1 has drawbacks such as being expensive and costly due to the use of radiation, and being difficult to handle and maintain. Therefore, a simpler char measurement method was desired.

[0008] This disclosure is made in view of these circumstances and aims to provide an unreacted powder measuring device, a measuring method thereof, and a recovery system that can improve the measurement accuracy of unreacted powder with an inexpensive configuration. [Means for solving the problem]

[0009] One aspect of the present disclosure is an unreacted powder measuring device applied to a recovery system comprising a recovery device for recovering unreacted powder from a product gas output from a process apparatus, and a supply pipe for supplying the unreacted powder from the recovery device to the process apparatus, wherein the recovery device comprises a plurality of recovery containers for storing the unreacted powder, a data acquisition unit for acquiring the total weight of the plurality of recovery containers, a supply amount calculation unit for calculating the amount of unreacted powder to be supplied to the process apparatus, and a recovery amount calculation unit for calculating the amount of unreacted powder recovered using the change in the total weight of the plurality of recovery containers over time and the amount of unreacted powder supplied to the process apparatus.

[0010] One aspect of the present disclosure is an unreacted powder measuring device applied to a recovery system comprising a recovery device for recovering unreacted powder from a product gas output from a process apparatus, and a supply pipe for supplying the unreacted powder from the recovery device to the process apparatus, wherein the recovery device comprises a plurality of recovery containers for storing the unreacted powder, and each of at least two of the recovery containers is capable of selectively switching between a plurality of uses, including a recovery use for containing the unreacted powder and a supply use for supplying the unreacted powder to a process apparatus, and the unreacted powder measuring device comprises a data acquisition unit for acquiring the total weight of the recovery containers used for the recovery use, and a recovery amount calculation unit for calculating the amount of unreacted powder recovered using the change in the total weight of the recovery containers used for the recovery use.

[0011] One aspect of this disclosure is a recovery system equipped with a measuring device for the unreacted powder.

[0012] One aspect of this disclosure is a carbon-containing fuel gasification facility equipped with the above-mentioned recovery system.

[0013] One aspect of the present disclosure is a method for measuring unreacted powder applied to a recovery system comprising a recovery device for recovering unreacted powder from a product gas output from a process apparatus, and a supply pipe for supplying the unreacted powder from the recovery device to the process apparatus, wherein the recovery device comprises a plurality of recovery containers for storing the unreacted powder, and the method for measuring unreacted powder is performed by a computer, comprising: a data acquisition step for acquiring the total weight of the plurality of recovery containers; a supply amount calculation step for calculating the amount of unreacted powder to be supplied to the process apparatus; and a recovery amount calculation step for calculating the amount of unreacted powder recovered using the change in the total weight of the plurality of recovery containers over time and the amount of unreacted powder supplied to the process apparatus.

[0014] One aspect of the present disclosure is a method for measuring unreacted powder applied to a recovery system comprising a recovery device for recovering unreacted powder from a product gas output from a process apparatus, and a supply pipe for supplying the unreacted powder from the recovery device to the process apparatus, wherein the recovery device comprises a plurality of recovery containers for storing the unreacted powder, and each of at least two of the recovery containers is capable of selectively switching between a plurality of uses, including a recovery use for containing the unreacted powder and a supply use for supplying the unreacted powder to a process apparatus, and the method for measuring unreacted powder is performed by a computer, comprising a data acquisition step of acquiring the total weight of the recovery containers used for the recovery use, and a recovery amount calculation step of calculating the amount of unreacted powder recovered using the change in the total weight of the recovery containers used for the recovery use.

[0015] One aspect of this disclosure is a program for causing a computer to function as a measuring device for the unreacted powder. [Effects of the Invention]

[0016] The low-cost configuration allows for improved measurement accuracy of unreacted powders such as char. [Brief explanation of the drawing]

[0017] [Figure 1] This figure shows an example of the schematic configuration of a coal gasification combined cycle power generation facility according to the first embodiment of this disclosure. [Figure 2] This figure shows an example of a schematic configuration of a gasifier according to the first embodiment of this disclosure. [Figure 3] This figure shows an example of a schematic configuration of a char recovery system according to the first embodiment of this disclosure. [Figure 4] This figure shows an example of the hardware configuration of a charge measuring device according to the first embodiment of this disclosure. [Figure 5] This is a functional configuration diagram showing an example of the functions of the charge measuring device according to the first embodiment of this disclosure. [Figure 6]This is a functional configuration diagram showing an example of the functions of the char measurement device according to the second embodiment of the present disclosure.

Mode for Carrying Out the Invention

[0018] 〔First Embodiment〕 Hereinafter, a measurement device for unreacted powder, a measurement method thereof, and a recovery system according to the first embodiment of the present disclosure will be described with reference to the drawings. In the embodiments described below, the case of application to a coal gasification combined cycle power generation facility (IGCC: Integrated Coal Gasification Combined Cycle) 10 will be exemplified and described.

[0019] FIG. 1 is a diagram showing an example of the schematic configuration of a coal gasification combined cycle power generation facility 10 according to the present embodiment. As shown in FIG. 1, a coal gasification combined cycle power generation facility (gasification combined cycle power generation facility) 10 includes, for example, a coal supply facility 11, a gasifier 101, a char recovery system (recovery system) 15, a gas purification facility 16, a gas turbine 17, and a heat recovery steam generator (HRSG) 18.

[0020] The coal gasification combined cycle power generation facility 10 purifies the generated gas generated in the gasifier 101 in the gas purification facility 16 into a fuel gas, and then supplies it to the gas turbine 17 to generate power. As the fuel supplied to the gasifier 101, for example, a carbon-containing solid fuel such as coal is used.

[0021] The coal supply facility 11 is supplied with, for example, coal which is a carbon-containing fuel, and manufactures a fine powder fuel pulverized into fine particles by pulverizing the coal with a coal mill (not shown). The fine powder fuel manufactured in the coal supply facility 11 is pressurized by nitrogen and supplied to the gasifier 101.

[0022] The gasifier 101 is supplied with the fine powder fuel manufactured in the coal supply facility 11 and the char (unreacted portion of the fine powder fuel) recovered by the char recovery system 15 described later. <00***02>

[0023] The gasifier 101 is configured, for example, as a two-stage jet bed type, and gasifies the fine fuel and char supplied inside by partial combustion with an oxidizer (air, oxygen) to produce a gas. A specific example of the configuration of the gasifier 101 will be described later. The product gas generated in the gasification furnace 101 is sent to the char recovery system 15 through the gas line.

[0024] In the char recovery system 15, char, which is unreacted powder contained in the generated gas, is separated. The generated gas, after the char has been separated, is sent to the gas purification facility 16 through the gas line. Meanwhile, the char separated from the generated gas is supplied from the char recovery system 15 to the gasification furnace 101 for recycling. Details of the char recovery system 15 will be described later.

[0025] The gas purification equipment 16 purifies the generated gas from which char has been separated by the char recovery system 15 by removing impurities such as sulfur compounds and nitrogen compounds. The gas purification equipment 16 purifies the generated gas to produce fuel gas, which is supplied to the gas turbine 17. Since the generated gas from which char has been separated contains sulfur compounds (such as H2S), the gas purification equipment 16 removes and recovers the sulfur compounds using an amine absorbent or the like, and utilizes them effectively as gypsum or the like.

[0026] The gas turbine 17 includes, for example, a compressor, a combustor, and a turbine. In the combustor, a mixture of compressed air supplied from the compressor and fuel gas supplied from the gas purification equipment 16 is burned to generate combustion gas, which is then supplied to the turbine to generate electricity. In addition to the gas turbine, a steam turbine may also be included.

[0027] The exhaust gas discharged from the gas turbine 17 is treated by an exhaust gas treatment device (not shown), such as a denitrification device, located inside or downstream of the heat recovery boiler 18, and then released into the atmosphere through the chimney 19.

[0028] Next, the gasifier 101 will be described with reference to Figure 2. Figure 2 is a diagram showing an example of the schematic configuration of the gasifier 101. As shown in Figure 2, the gasifier 101 is formed to extend vertically, with pulverized fuel and an oxidizer (air, oxygen) supplied to the lower side in the vertical direction, and the product gas, which is partially combusted and gasified, flows from the lower side to the upper side in the vertical direction. The gasifier 101 has, for example, a pressure vessel 110 and a gasifier wall (furnace wall) 111 provided inside the pressure vessel 110.

[0029] Within the space inside the gasification furnace wall 111, the combustor section 116, the diffuser section 117, and the reducer section 118 are formed in order from the vertically downward side (i.e., the upstream side in the direction of gas flow).

[0030] The annulus section 115 is a space formed between the inside of the pressure vessel 110 and the outside of the gasification furnace wall 111. For example, nitrogen, an inert gas, is supplied through a nitrogen supply line (not shown). Near the upper vertical part of the annulus section 115, a furnace pressure equalization pipe (not shown) is provided to equalize the pressure inside the gasification furnace 101. The furnace pressure equalization pipe is provided to connect the inside and outside of the gasification furnace wall 111 and approximately equalizes the pressure difference between the internal space of the pressure vessel 110 (combustor section 116, diffuser section 117, and reducer section 118) and the external space (annulus section 115) so that it is within a predetermined pressure.

[0031] In the combustor section 116, the gasification furnace wall 111 is equipped with a char burner 125 and a combustor-type pulverized coal burner 126, arranged in order from the upper side of the furnace. In the combustor section 116, high-temperature combustion gas is generated by the combustion of pulverized fuel and char. The high-temperature combustion gas passes through the diffuser section 117 and flows into the reducer section 118. Furthermore, in the combustor section 116, the combustion of fine fuel and char causes ash to melt in the high-temperature gas, generating slag. This slag flows down the gasification furnace wall 111, passes through the slag hole H located at the bottom of the combustor section 116, and is finally discharged into the water reservoir in the slag hopper 122.

[0032] In the reducer section 118, a combustion device consisting of multiple reducer-type pulverized coal burners (burners) 127 is arranged on the gasification furnace wall 111. The reducer section 118 is maintained at the high temperature necessary for the gasification reaction. In the reducer section 118, pulverized fuel is mixed with high-temperature combustion gas, and the pulverized fuel undergoes partial combustion in a high-temperature reducing atmosphere to carry out a gasification reaction and generate product gas. The gasified product gas is cooled by heat exchange in the syngas cooler 102 and sent to the char recovery system 15 through the gas line.

[0033] Next, the char recovery system 15 will be described with reference to Figure 3. Figure 3 is a diagram showing an example of the schematic configuration of the char recovery system 15. As shown in Figure 3, the char recovery system 15 includes a recovery device 50 and a char supply line (supply piping) 51. The recovery device 50 includes, for example, a dust collector 60 and a plurality of recovery containers, namely a charbin 62 and a plurality of hoppers 63 (63a to 63c). Figure 3 illustrates three hoppers 63, but the number of hoppers to be installed is not limited as long as there are two or more. In the following, when it is necessary to distinguish between hoppers 63a, 63b, and 63c, they will be referred to as hoppers 63a, 63b, and 63c, respectively, and when it is not necessary to distinguish between them, they will simply be referred to as hopper 63.

[0034] The generated gas produced in the gasifier 101 is supplied to the charbin (recovery container) 62. The charbin 62 uses centrifugal force to recover coarse char from the generated gas of the gasifier 101, and also discharges the fine char that has been returned from the dust collector 60 via the lower hopper 61 of the dust collector into the lower hopper 63 by gravity. The dust collector 60 is composed of, for example, one or more cyclones or porous filters, and separates fine char from the generated gas from which coarse char has been separated in the char bin 62. The generated gas from which fine char has been separated in the dust collector 60 is sent to the downstream equipment. The fine char is returned to the bottom of the char bin (recovery container) 62 via the hopper 61 at the bottom of the dust collector.

[0035] Each hopper 63a to 63c is designed to be used selectively for multiple purposes, including a recovery purpose for containing unreacted powder and a supply purpose for supplying unreacted powder to the gasifier 101. In this embodiment, the three purposes of recovery, standby, and supply are switched sequentially. As a result, at a certain time, for example, hopper 63a is used for the supply purpose to supply the stored char to the gasifier 101, hopper 63b is used for the standby purpose with char stored inside, and hopper 63c is used for the recovery purpose to recover char from the char bin 62. By switching these purposes in sequence, char recovery and supply are carried out stably and continuously. Furthermore, if there are two hoppers 63, the standby use is omitted. Also, if there are four or more hoppers 63, multiple hoppers 63 may be used for a single purpose. In addition, the switching of the hopper 63's purpose may be performed at the same time for all hoppers 63, or it may be performed at different times as appropriate.

[0036] The char output from the supply hopper 63 is returned to the gasifier 101 through the char supply line 51. For example, the char is pumped to the gasifier 101 using nitrogen supplied from another line to the char supply line 51 as the transport gas. The char supply line 51 is equipped with a flow control valve 52 for adjusting the flow rate of char.

[0037] Furthermore, the char recovery system 15 is equipped with a char measuring device (a device for measuring unreacted powder) 55. Figure 4 shows an example of the hardware configuration of the charge measurement device 55. As shown in Figure 4, the charge measurement device 55 is a computer and includes, for example, a CPU (Central Processing Unit: processor) 21, main memory 22, secondary storage (memory) 23, etc. The charge measurement device 55 may also have a communication interface 24 for exchanging information with external devices (for example, various sensors, system control devices, etc.). The charge measurement device 55 may also have an external interface 25 for connecting external devices. Furthermore, the charge measurement device 55 may include an input unit for user input operations, a display for displaying data, etc.

[0038] The main memory 22 is composed of writable memory such as RAM (Random Access Memory), and is used as a work area for reading the CPU 21's executable program and writing processing data by the executable program. The secondary storage device 23 is a non-transitory computer-readable storage medium. Examples of secondary storage devices 23 include magnetic disks such as HDDs (Hard Disk Drives), magneto-optical disks, CD-ROMs, DVD-ROMs, and semiconductor memory such as SSDs (Solid State Drives).

[0039] Next, the functions of the charge measuring device 55 according to this embodiment will be described with reference to the figures. Figure 5 is a functional configuration diagram showing an example of the functions of the charge measuring device 55 according to this embodiment. The series of processes necessary to realize the various functions described later are stored in the form of a program in a secondary storage device 23, for example. The CPU (processor) 21 reads this program into the main memory 22 and performs information processing and calculations to realize the various functions. The program may be pre-installed in the secondary storage device 23, provided stored in a non-temporary computer-readable storage medium, or distributed via wired or wireless communication. Examples of non-temporary computer-readable storage media include magnetic disks, magneto-optical disks, CD-ROMs, DVD-ROMs, and semiconductor memory.

[0040] The charge measuring device 55 includes a data acquisition unit 31 and a recovery amount calculation unit 32.

[0041] Furthermore, the charge measuring device 55 may also include a supply amount calculation unit 33.

[0042] The data acquisition unit 31 acquires, for example, the total weight of the charbin 62 and the hopper 63.

[0043] For example, each of the charbin 62 and hopper 63 is provided with a weight measuring device (not shown) for measuring the total weight of the hopper, including the stored char. A load cell can be used as a weight measuring device. The data acquisition unit 31 acquires the weights of the churbin 62 and each hopper 63a to 63b (hereinafter referred to as "total hopper weight") measured by each weight measuring instrument.

[0044] Furthermore, the data acquisition unit 31 acquires the differential pressure across the flow control valve 52. Here, the differential pressure across the flow control valve 52 corresponds to the difference between the pressure of the gasification furnace 101 and the char supply pressure.

[0045] The supply amount calculation unit 33 calculates the char supply amount by multiplying the differential pressure across the flow control valve 52, acquired by the data acquisition unit 31, by a predetermined coefficient. The supply amount calculation unit 33 calculates the char supply amount using, for example, the following equation (1).

[0046] Charge supply rate [t / h] = α × differential pressure across the flow control valve (1)

[0047] In equation (1) above, α is a predetermined coefficient set by the valve opening of the flow control valve 52, and is set to an appropriate value in advance through simulation or the like. Here, the differential pressure across the flow control valve 52 is noisy. Therefore, it is advisable to perform smoothing processing using a low-pass filter or the like. For example, a delay element of approximately 10 minutes or so can be used.

[0048] The recovery amount calculation unit 32 calculates the amount of char recovered using the total weight (total hopper weight) of each char bin 62 and each hopper 63a to 63c acquired by the data acquisition unit 31 and the char supply amount calculated by the supply amount calculation unit 33.

[0049] The recovery amount calculation unit 32 calculates the amount of char recovered using, for example, the time change of the total hopper weight and the char supply amount. More specifically, it calculates the amount of char recovered per unit time (char recovery flow rate) by adding the char supply amount per unit time (char supply flow rate) to the smoothed value of the time change of the total hopper weight. In other words, the time change of the total hopper weight is a differential operation and therefore has a lot of noise. For this reason, it is good to perform smoothing using a smoothing filter. A low-pass filter is an example of a smoothing filter. The time constant is set to a larger value than the time constant used in the supply amount calculation unit 33. This is because the noise of the time change of the total hopper weight is greater than the noise of the differential pressure across the flow control valve 52.

[0050] The recovery amount calculation unit 32 calculates the char recovery amount using, for example, the following equation (2).

[0051] Char recovery rate [t / h] = (Total hopper weight [t] - Total hopper weight [t] k1 seconds ago) × (3600 / k1) + Char supply rate [t / h] (2)

[0052] In equation (2), "k1" is a value (sampling interval) that is determined in advance by a measuring device or the like.

[0053] The char recovery amount and char supply amount calculated in this manner are output to a control system (not shown) that controls the char recovery system 15 and the gasifier 101. This makes it possible to control the gasifier 101 using the char recovery amount and char supply flow rate. This enables, for example, stable operation of the gasifier 101.

[0054] As described above, according to this embodiment, the amount of char recovered is calculated using the time change in the total weight of the hopper and the amount of char supplied. This makes it possible to improve the measurement accuracy (calculation accuracy) of the amount of char recovered compared to the method disclosed in Patent Document 1, which estimates the amount of char recovered using a gamma-ray level meter. Furthermore, since a level meter using radiation is not required, the amount of char recovered can be measured with an inexpensive configuration.

[0055] Furthermore, according to this embodiment, since the amount of char recovered is calculated using the total weight of the char bin 62 and hoppers 63a to 63c, even when switching the use of each hopper 63a to 63c, it is not necessary to switch the weight data used to calculate the amount of char recovered according to the use, as in the char recovery amount measurement method in the second embodiment described later.

[0056] Furthermore, according to this embodiment, the char supply amount is calculated using the differential pressure across the flow control valve 52. The noise of the differential pressure across the flow control valve 52 is smaller than the noise of the time change in the total hopper weight used when calculating the char recovery amount. Therefore, it is possible to use a low-pass filter with a relatively small time constant. This makes it possible to reduce the delay time and improve responsiveness.

[0057] In this embodiment, char is supplied to the hopper 63 via the char bin 62, but this is not the only configuration. For example, the char bin 62 may be omitted. Alternatively, the char bin 62 may be combined with a cyclone having a char separation function. Furthermore, the lower hopper 61 of the dust collector may be omitted.

[0058] [Second Embodiment] Next, a second embodiment of the present disclosure will be described. In this embodiment, the system configuration of the char recovery system 15 is the same as in the first embodiment described above, but the method for calculating the char supply amount and char recovery amount by the char measuring device 55a differs from that of the first embodiment. The following mainly describes the method for calculating the amount of char supplied and the amount of char recovered by the char measuring device 55a according to this embodiment.

[0059] Figure 6 is a functional configuration diagram showing an example of the functions provided by the charge measuring device 55a of this embodiment. The series of processes for realizing the various functions described later are, as in the first embodiment described above, stored in the form of a program in the secondary storage device 23, for example. The CPU (processor) 21 reads this program into the main memory 22 and performs information processing and calculations to realize the various functions. The program may be pre-installed in the secondary storage device 23, provided in the form of being stored in a non-temporary computer-readable storage medium, or distributed via wired or wireless communication means. Examples of non-temporary computer-readable storage media include magnetic disks, magneto-optical disks, CD-ROMs, DVD-ROMs, and semiconductor memory.

[0060] The charge measuring device 55a includes a data acquisition unit 41 and a recovery amount calculation unit 42.

[0061] Furthermore, the charge measuring device 55a may also include a supply amount calculation unit 43.

[0062] The data acquisition unit 41 acquires, for example, the total weight (including the weight of the stored char) of the hoppers 63 used for recovery purposes (hereinafter referred to as "recovery hoppers"). The data acquisition unit 41 also acquires the total weight (including the weight of the stored char) of the hoppers 63 used for supply purposes (hereinafter referred to as "supply hoppers"). The total weight of the recovery hopper and the total weight of the supply hopper can be obtained, for example, from a weighing instrument (e.g., a load cell) corresponding to the hopper 63 in question.

[0063] The recovery amount calculation unit 42 calculates the char recovery amount using the time change in the total weight of the recovery hopper acquired by the data acquisition unit 41. More specifically, the recovery amount calculation unit 42 calculates the char recovery amount per unit time (char recovery flow rate) by smoothing the time change of the total weight of the recovery hopper. Since the time change of the hopper weight is a differential operation, it is noisy. For this reason, it is preferable to perform smoothing using a smoothing filter. A low-pass filter is an example of a smoothing filter. The time constant can be determined in advance by performing simulations or other methods and registered as an appropriate value. The time constant of the delay element is set to a larger value than the time constant used in the supply amount calculation unit 33 in the first embodiment described above.

[0064] The recovery amount calculation unit 42 calculates the char recovery amount using, for example, the following equation (3).

[0065] Charge recovery rate [t / h] = (Total weight of recovery hopper [t] - Total weight of recovery hopper [t] k2 seconds ago) × (3600 / k2) (3)

[0066] In equation (3), "k2" is a value (sampling interval) that is determined in advance by a measuring device or the like.

[0067] The supply amount calculation unit 43 calculates the char supply amount using the time change in the total weight of the supply hopper acquired by the data acquisition unit 41. More specifically, the char supply rate per unit time (char supply flow rate) is calculated by smoothing the time change of the total weight of the supply hopper. Since the time change of hopper weight is a differential operation, it is noisy. For this reason, it is advisable to perform smoothing using a smoothing filter. A low-pass filter is one example of a smoothing filter. The time constant can be determined in advance by performing simulations or other methods and registered as an appropriate value. The time constant of the delay element is set to a larger value than the time constant used in the supply amount calculation unit 33 in the first embodiment described above.

[0068] The supply quantity calculation unit 43 calculates the char supply quantity using, for example, the following equation (4).

[0069] Char supply rate [t / h] = (Total weight of supply hopper [t] - Total weight of supply hopper [t] k3 seconds ago) × (3600 / k3) (4)

[0070] In equation (4), "k3" is a value (sampling interval) that is determined in advance by a measuring device or the like.

[0071] The char recovery amount and char supply amount calculated in this manner are output to a control system (not shown) that controls the char recovery system 15 and the gasifier 101. This enables control of the system using the char recovery amount and char supply flow rate, and for example, enables stable operation of the gasifier 101.

[0072] As described above, according to this embodiment, the amount of char recovered is calculated using the time change in the total weight of the recovery hopper. This makes it possible to improve the measurement accuracy (estimation accuracy) of the amount of char recovered compared to the method disclosed in Patent Document 1, which estimates the amount of char recovered using a gamma-ray level meter. Furthermore, since a level meter using radiation is not required, the amount of char recovered can be measured with an inexpensive configuration.

[0073] Furthermore, according to this embodiment, the char supply amount is calculated using the time change in the total weight of the supply hopper. This makes it possible to improve the measurement accuracy (estimation accuracy) of the char supply amount compared to the method disclosed in Patent Document 1, which estimates the char supply amount using a gamma-ray level meter.

[0074] Although the present disclosure has been described above using embodiments, the technical scope of this disclosure is not limited to the scope described in the embodiments above. Various modifications or improvements can be made to the embodiments without departing from the gist of the disclosure, and such modified or improved forms are also included in the technical scope of this disclosure. Furthermore, the embodiments above may be combined as appropriate.

[0075] [Variation 1] Instead of the method for calculating the char supply amount in the first embodiment described above, the method for calculating the char supply amount in the second embodiment may be adopted. In this case, the char measuring device will be a combination of the recovery amount calculation unit 32 shown in Figure 5 and the supply amount calculation unit 43 shown in Figure 6. In this case, the data acquisition unit will only need to acquire the data required by the recovery amount calculation unit 32 and the supply amount calculation unit 43.

[0076] [Variation 2] Instead of the method for calculating the amount of char recovered in the first embodiment described above, the method for calculating the amount of char recovered in the second embodiment may be adopted. In this case, the char measuring device will be a combination of the recovery amount calculation unit 42 shown in Figure 6 and the supply amount calculation unit 33 shown in Figure 5. In this case, the data acquisition unit will only need to acquire the data required by the recovery amount calculation unit 42 and the supply amount calculation unit 33.

[0077] Furthermore, the configuration of the char recovery system 15 described above is just one example, and the char measuring devices 55 and 55a according to each embodiment and modified example are widely applicable to known char recovery systems 15. Furthermore, the configurations of the gasifier 101 and the coal gasification combined cycle power generation equipment 10 in each embodiment are merely examples, and other known configurations can be appropriately combined.

[0078] Furthermore, while each embodiment illustrates the application of the “unreacted powder measuring device” of this disclosure to the char recovery system 15 and its use as char measuring devices 55 and 55a, the invention is not limited thereto. For example, the “unreacted powder measuring device” of this disclosure can be broadly applied to a recovery system comprising a recovery device that recovers unreacted powder from the generated gas output from process equipment, and a supply pipe that supplies the unreacted powder from the recovery device to the process equipment.

[0079] For example, in a system where waste is fed into a gasification and melting furnace (process equipment) and burned, there may be a mechanism to recover dust (unreacted powder) from the gas output from the gasification and melting furnace and return it to the furnace. In such cases, the "unreacted powder measuring device" of this disclosure can be applied to measure the unreacted dust. Furthermore, the "unreacted powder measuring device" described herein can also be applied to various plants such as steel plants, chemical plants, and glass manufacturing plants.

[0080] In a steelmaking plant, raw materials containing iron ore are fed into a blast furnace (process equipment) to produce iron. When unreacted powdered iron ore is recovered from the gas output from the blast furnace and returned to the blast furnace, the "unreacted powder measuring device" of this disclosure can be applied to measure the amount of unreacted powdered iron ore.

[0081] In chemical plants, during polymer production, monomer powder is supplied to a high-temperature, high-pressure reactor (process equipment) to carry out a polymerization reaction. When unreacted powder contained in the gas output from the reactor is recovered and returned to the reactor, the "unreacted powder measuring device" of this disclosure can be applied to measure the amount of unreacted powder.

[0082] In a glass manufacturing plant, powdered raw materials such as silica sand, sodium carbonate, and limestone are introduced into a high-temperature melting furnace under pressure to produce glass. When unreacted powdered raw materials contained in the gas output from the melting furnace are recovered and returned to the furnace, the "unreacted powder measuring device" of this disclosure can be applied to measure the amount of unreacted powder.

[0083] <Note> The unreacted powder measuring device, measuring method, and recovery system described in the embodiments above can be understood, for example, as follows:

[0084] An unreacted powder measuring device (55) according to a first aspect of the present disclosure is an unreacted powder measuring device applied to a recovery system (15) comprising a recovery device (50) for recovering unreacted powder from a product gas output from a process device (101) and a supply pipe (51) for supplying the unreacted powder from the recovery device to the process device, wherein the recovery device comprises a plurality of recovery containers (62, 63) for storing the unreacted powder, a data acquisition unit (31, 41) for acquiring the total weight of the plurality of recovery containers, a supply amount calculation unit (33, 43) for calculating the amount of unreacted powder supplied to the process device, and a recovery amount calculation unit (32) for calculating the amount of unreacted powder recovered using the time change of the total weight of the plurality of recovery containers (62, 63) and the amount of unreacted powder supplied to the process device.

[0085] According to the above embodiment, the amount of unreacted powder recovered is calculated using the time change in the total weight of multiple recovery containers storing the unreacted powder and the amount of unreacted powder supplied to the process apparatus. This makes it possible to improve the measurement accuracy (calculation accuracy) of the amount of unreacted powder recovered compared to the method disclosed in Patent Document 1, which estimates the supply amount using a gamma-ray level meter. Furthermore, since a radiation level meter is not required, the amount of unreacted powder recovered can be measured with an inexpensive configuration.

[0086] In the second aspect of the present disclosure, the unreacted powder measuring device (55) in the first aspect calculates the amount of unreacted powder recovered per unit time by adding the amount of unreacted powder supplied per unit time to a value obtained by smoothing the time change of the total weight of the plurality of recovery containers (62, 63).

[0087] According to the above embodiment, the amount of unreacted powder recovered per unit time is calculated using a value obtained by smoothing the time change of the total weight of multiple recovery containers. This reduces noise and allows for stable calculation results.

[0088] In the third aspect of the present disclosure, the unreacted powder measuring device (55) is configured such that, in the first or second aspect, the data acquisition unit (31) acquires the pressure of the process apparatus and the supply pressure of the unreacted powder supplied to the process apparatus, and the supply amount calculation unit (33) calculates the supply amount of the unreacted powder by multiplying the difference between the pressure of the process apparatus and the supply pressure of the unreacted powder by a predetermined coefficient based on the valve opening of the flow rate control valve 52.

[0089] According to the above embodiment, the amount of unreacted powder supplied is calculated using the difference between the pressure of the process equipment and the supply pressure of the unreacted powder. The noise in the difference between the pressure of the process equipment and the supply pressure of the unreacted powder is smaller than the noise in the time change of the total weight of the multiple recovery containers used when calculating the amount of unreacted powder recovered. Therefore, stable calculation results can be obtained.

[0090] In the fourth aspect of the present disclosure, the unreacted powder measuring device (55) is provided in the first or second aspect of the present disclosure, with the supply piping (51) having a flow control valve (52) for adjusting the flow rate of the unreacted powder, the data acquisition unit (31) acquiring the differential pressure of the flow control valve, and the supply amount calculation unit (33) calculating the supply amount of the unreacted powder by multiplying the differential pressure of the flow control valve by a predetermined coefficient based on the valve opening of the flow control valve 52.

[0091] According to the above embodiment, the amount of unreacted powder supplied is calculated using the differential pressure across the flow control valve. The noise from the differential pressure across the flow control valve is smaller than the noise from the time change in the total weight of the multiple recovery containers used when calculating the amount of unreacted powder recovered. Therefore, stable calculation results can be obtained.

[0092] In the fifth aspect of the present disclosure, the unreacted powder measuring device is configured such that, in the first or second aspect, each of at least two of the recovery containers (63) can be selectively switched between a plurality of uses, including a recovery use for containing the unreacted powder and a supply use for supplying the unreacted powder to a process device (101). The data acquisition unit (41) acquires the total weight of the recovery containers (63) used for the supply use, and the supply amount calculation unit (43) calculates the supply amount of the unreacted powder using the change in the total weight of the recovery containers used for the supply use over time.

[0093] According to the above embodiment, the amount of unreacted powder supplied is calculated using the time change in the total weight of the recovery container used for supply purposes. This makes it possible to improve the measurement accuracy (estimation accuracy) of the amount of unreacted powder supplied compared to the method disclosed in Patent Document 1, which calculates the supply amount using a gamma-ray level meter.

[0094] In the sixth aspect of the present disclosure, the unreacted powder measuring device, in the fifth aspect described above, has a supply amount calculation unit (43) that calculates the supply amount of the unreacted powder per unit time by smoothing the time change in the total weight of the recovery container (63) for supply purposes.

[0095] According to the above embodiment, the amount of unreacted powder supplied per unit time is calculated using a smoothed value of the time change in the total weight of the recovery container used for supply purposes. This reduces noise and allows for stable calculation results.

[0096] An unreacted powder measuring device (55a) according to a seventh aspect of the present disclosure is an unreacted powder measuring device applied to a recovery system (15) comprising a recovery device (50) for recovering unreacted powder from a product gas output from a process device (101) and a supply pipe (51) for supplying the unreacted powder from the recovery device to the process device, wherein the recovery device comprises a plurality of recovery containers (62, 63) for storing the unreacted powder, and each of at least two of the recovery containers (63) can be selectively switched between a plurality of uses, including a recovery use for containing the unreacted powder and a supply use for supplying the unreacted powder to the process device, and comprises a data acquisition unit (31, 41) for acquiring the total weight of the recovery containers used for the recovery use, and a recovery amount calculation unit (42) for calculating the amount of unreacted powder recovered using the change in the total weight of the recovery containers (63) used for the recovery use over time.

[0097] According to the above embodiment, the amount of unreacted powder recovered is calculated using the time change in the total weight of the recovery container used for recovery purposes. This makes it possible to improve the measurement accuracy (estimation accuracy) of the amount of unreacted powder recovered compared to the method disclosed in Patent Document 1, which estimates the amount recovered using a gamma-ray level meter.

[0098] In the eighth aspect of this disclosure, the unreacted powder measuring device (55a) in the seventh aspect calculates the amount of unreacted powder recovered per unit time by smoothing the time change in the total weight of the recovery container (63) used for recovery purposes.

[0099] According to the above embodiment, the amount of unreacted powder recovered per unit time is calculated using a smoothed value of the time change in the total weight of the recovery container used for recovery purposes. This reduces noise and allows for stable calculation results.

[0100] An unreacted powder measuring device (55a) according to the ninth aspect of this disclosure, in the seventh or eighth aspect described above, the data acquisition unit (41) includes a supply amount calculation unit (43) which acquires the total weight of the recovery container (63) used for supply purposes and calculates the supply amount of the unreacted powder using the change in the total weight of the recovery container used for supply purposes over time.

[0101] According to the above embodiment, the amount of unreacted powder supplied is calculated using the time change in the total weight of the recovery container used for supply purposes. This makes it possible to improve the measurement accuracy (estimation accuracy) of the amount of unreacted powder supplied compared to the method disclosed in Patent Document 1, which calculates the supply amount using a gamma-ray level meter.

[0102] In the tenth aspect of the present disclosure, the unreacted powder measuring device (55a) is configured such that, in the ninth aspect, the supply amount calculation unit (43) calculates the supply amount of the unreacted powder per unit time by smoothing the time change in the total weight of the recovery container (63) used for supply purposes.

[0103] According to the above embodiment, the amount of unreacted powder supplied per unit time is calculated using a smoothed value of the time change in the total weight of the recovery container used for supply purposes. This reduces noise and allows for stable calculation results.

[0104] In the eleventh aspect of the present disclosure, the unreacted powder measuring device, in the seventh or eighth aspect described above, includes a data acquisition unit (31, 41) which acquires the pressure of the process device (101) and the supply pressure of the unreacted powder supplied to the process device, and a supply amount calculation unit (33) which calculates the supply amount of the unreacted powder by multiplying the difference between the pressure of the process device and the supply pressure of the unreacted powder by a predetermined coefficient.

[0105] According to the above embodiment, the amount of unreacted powder supplied is calculated using the difference between the pressure of the process equipment and the supply pressure of the unreacted powder. The noise in the difference between the pressure of the process equipment and the supply pressure of the unreacted powder is smaller than the noise in the time change of the total weight of the multiple recovery containers used when calculating the amount of unreacted powder recovered. Therefore, stable calculation results can be obtained. The "predetermined coefficient" mentioned above is, for example, a predetermined coefficient based on the valve opening degree of the flow control valve.

[0106] In the twelfth aspect of the present disclosure, the measuring device for unreacted powder is provided in the eleventh aspect, with a flow control valve (52) for adjusting the flow rate of the unreacted powder in the supply piping (51), the data acquisition unit (31, 41) acquires the differential pressure of the flow control valve, and the supply amount calculation unit (33) calculates the supply amount of the unreacted powder by multiplying the differential pressure of the flow control valve (52) by a predetermined coefficient.

[0107] According to the above embodiment, the amount of unreacted powder supplied is calculated using the differential pressure across the flow control valve. The noise from the differential pressure across the flow control valve is smaller than the noise from the time change in the total weight of the multiple recovery containers used when calculating the amount of unreacted powder recovered. Therefore, stable calculation results can be obtained. The "predetermined coefficient" mentioned above is, for example, a predetermined coefficient based on the valve opening degree of the flow control valve.

[0108] A recovery system (15) according to the 13th aspect of this disclosure comprises an unreacted powder measuring device (55, 55a) as described in any of the 1st to 12th aspects above.

[0109] A carbon-containing fuel gasification equipment (10) according to the 14th aspect of this disclosure comprises the recovery system (15) described in the 13th aspect above.

[0110] A method for measuring unreacted powder according to a 15th aspect of this disclosure is a method for measuring unreacted powder applied to a recovery system (15) comprising a recovery device (50) for recovering unreacted powder from a product gas output from a process device (101) and a supply pipe (51) for supplying the unreacted powder from the recovery device to the process device, wherein the recovery device comprises a plurality of recovery containers (62, 63) for storing the unreacted powder, and a computer performs a data acquisition step of acquiring the total weight of the plurality of recovery containers, a supply amount calculation step of calculating the amount of unreacted powder to be supplied to the process device, and a recovery amount calculation step of calculating the amount of unreacted powder recovered using the time change of the total weight of the plurality of recovery containers and the amount of unreacted powder supplied to the process device.

[0111] A method for measuring unreacted powder according to a 16th aspect of this disclosure is a method for measuring unreacted powder applied to a recovery system (15) comprising a recovery device (50) for recovering unreacted powder from a product gas output from a process device (101) and a supply pipe (51) for supplying the unreacted powder from the recovery device to the process device, wherein the recovery device comprises a plurality of recovery containers (62, 63) for storing the unreacted powder, and each of at least two of the recovery containers (63) can be selectively switched between a plurality of uses, including a recovery use for containing the unreacted powder and a supply use for supplying the unreacted powder to the process device, and a computer performs a data acquisition step of acquiring the total weight of the recovery containers used for the recovery use, and a recovery amount calculation step of calculating the amount of unreacted powder recovered using the change in the total weight of the recovery containers used for the recovery use.

[0112] The program relating to the 17th aspect of this disclosure causes a computer to function as a measuring device for unreacted powder as described in any of the 1 to 12 aspects above. [Explanation of Symbols]

[0113] 10: Coal gasification combined cycle power generation facility 11: Coal feeding equipment 15: Charger Recovery System (Recovery System) 16: Gas purification equipment 17: Gas Turbine 18: Waste heat recovery boiler 19: Chimney 21: CPU 22: Main memory 23:Secondary storage device 24: Communication Interface 25: External Interface 31: Data Acquisition Unit 32: Recovery amount calculation unit 33:Supply amount calculation section 41: Data Acquisition Unit 42: Recovery amount calculation unit 43:Supply amount calculation section 50: Recovery device 51: Charge supply line (supply piping) 52: Flow control valve 55: Char measuring device (device for measuring unreacted powder) 55a: Char measuring device (device for measuring unreacted powder) 60: Dust collector 61: Lower hopper of dust collector 62: Charbin (collection container) 63: Hopper (collection container) 63a: Hopper (recovery container) 63b: Hopper (collection container) 63c: Hopper (collection container) 101: Gasification furnace (process equipment) 102: Singasukura 110: Pressure vessel 111: Gasification furnace wall 115: Annuus section 116: Combusta Club 117: Diffuser section 118: Reducer section 122: Slug Hopper 125: Chabanana 126: Combustor-type pulverized coal burner H: Slughole

Claims

1. An unreacted powder measuring device applied to a recovery system comprising a recovery device for recovering unreacted powder from a product gas output from a process apparatus, and a supply pipe for supplying the unreacted powder from the recovery device to the process apparatus, The recovery device comprises a plurality of recovery containers for storing the unreacted powder, A data acquisition unit that acquires the total weight of multiple collection containers, A supply amount calculation unit that calculates the amount of unreacted powder to be supplied to the process apparatus, A recovery amount calculation unit calculates the amount of unreacted powder recovered using the time change in the total weight of the multiple recovery containers and the amount of unreacted powder supplied to the process apparatus. A measuring device for unreacted powder, equipped with the following features.

2. The unreacted powder measuring device according to claim 1, wherein the recovery amount calculation unit calculates the amount of unreacted powder recovered per unit time by adding the supply amount of unreacted powder per unit time to a value obtained by smoothing the time change of the total weight of the plurality of recovery containers.

3. The data acquisition unit acquires the pressure of the process apparatus and the supply pressure of the unreacted powder supplied to the process apparatus. The unreacted powder measuring device according to claim 1, wherein the supply amount calculation unit calculates the supply amount of the unreacted powder by multiplying the difference between the pressure of the process apparatus and the supply pressure of the unreacted powder by a predetermined coefficient.

4. The supply piping is provided with a flow control valve for adjusting the flow rate of the unreacted powder. The data acquisition unit acquires the differential pressure of the flow control valve, The unreacted powder measuring device according to claim 1, wherein the supply amount calculation unit calculates the supply amount of the unreacted powder by multiplying the differential pressure of the flow control valve by a predetermined coefficient.

5. Each of at least two of the recovery containers is capable of selectively switching between multiple uses, including a recovery use for containing unreacted powder and a supply use for supplying the unreacted powder to a process apparatus. The data acquisition unit acquires the total weight of the recovery containers for supply purposes. The unreacted powder measuring device according to claim 1, wherein the supply amount calculation unit calculates the supply amount of the unreacted powder using the change in the total weight of the recovery container for supply purposes over time.

6. The unreacted powder measuring device according to claim 5, wherein the supply amount calculation unit calculates the supply amount of the unreacted powder per unit time by smoothing the time change of the total weight of the recovery container for supply purposes.

7. An unreacted powder measuring device applied to a recovery system comprising a recovery device for recovering unreacted powder from a product gas output from a process apparatus, and a supply pipe for supplying the unreacted powder from the recovery device to the process apparatus, The recovery device comprises a plurality of recovery containers for storing the unreacted powder, and each of at least two of the recovery containers is capable of selectively switching between a plurality of uses, including a recovery use for containing the unreacted powder and a supply use for supplying the unreacted powder to the process apparatus. A data acquisition unit that acquires the total weight of the collection containers used for collection purposes, A recovery amount calculation unit calculates the amount of unreacted powder recovered using the time change in the total weight of the recovery container used for recovery purposes. A measuring device for unreacted powder, equipped with the following features.

8. The unreacted powder measuring device according to claim 7, wherein the recovery amount calculation unit calculates the amount of unreacted powder recovered per unit time by smoothing the time change in the total weight of the recovery container used for recovery purposes.

9. The data acquisition unit acquires the total weight of the recovery containers used for supply purposes. The unreacted powder measuring device according to claim 7, further comprising a supply amount calculation unit that calculates the supply amount of the unreacted powder using the time change in the total weight of the recovery container used for supply purposes.

10. The unreacted powder measuring device according to claim 9, wherein the supply amount calculation unit calculates the supply amount of the unreacted powder per unit time by smoothing the time change of the total weight of the recovery container used for supply purposes.

11. The data acquisition unit acquires the pressure of the process apparatus and the supply pressure of the unreacted powder supplied to the process apparatus. The unreacted powder measuring device according to claim 7, further comprising a supply amount calculation unit that calculates the supply amount of the unreacted powder by multiplying the difference between the pressure of the process apparatus and the supply pressure of the unreacted powder by a predetermined coefficient.

12. The supply piping is provided with a flow control valve for adjusting the flow rate of the unreacted powder. The data acquisition unit acquires the differential pressure of the flow control valve, The unreacted powder measuring device according to claim 11, wherein the supply amount calculation unit calculates the supply amount of the unreacted powder by multiplying the differential pressure of the flow control valve by a predetermined coefficient.

13. A recovery system comprising a measuring device for unreacted powder according to any one of claims 1 to 12.

14. A carbon-containing fuel gasification apparatus comprising the recovery system described in claim 13.

15. A method for measuring unreacted powder, applicable to a recovery system comprising a recovery device for recovering unreacted powder from a product gas output from a process apparatus, and a supply pipe for supplying the unreacted powder from the recovery device to the process apparatus, The recovery device comprises a plurality of recovery containers for storing the unreacted powder, A data acquisition step to obtain the total weight of multiple collection containers, A supply amount calculation step for calculating the amount of unreacted powder to be supplied to the process apparatus, A recovery amount calculation step that calculates the amount of unreacted powder recovered using the time change in the total weight of the multiple recovery containers and the amount of unreacted powder supplied to the process apparatus. A method for measuring unreacted powder, performed by a computer.

16. A method for measuring unreacted powder, applicable to a recovery system comprising a recovery device for recovering unreacted powder from a product gas output from a process apparatus, and a supply pipe for supplying the unreacted powder from the recovery device to the process apparatus, The recovery device comprises a plurality of recovery containers for storing the unreacted powder, and each of at least two of the recovery containers is capable of selectively switching between a plurality of uses, including a recovery use for containing the unreacted powder and a supply use for supplying the unreacted powder to a process device. A data acquisition step to obtain the total weight of the collection containers used for collection purposes, A recovery amount calculation step that calculates the amount of unreacted powder recovered using the time change in the total weight of the recovery container used for recovery purposes, A method for measuring unreacted powder, performed by a computer.

17. A program for causing a computer to function as a measuring device for unreacted powder according to any one of claims 1 to 12.

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