JP2020056753A - Powder measurement device, powder supply hopper, gasification furnace facility, gasification combined cycle facility, and powder measurement method - Google Patents

Abstract

To provide a powder measurement device capable of measuring powder even when the powder reaches the uppermost part of a container.SOLUTION: A powder measurement device 50 includes: a cylindrical part radiation source 57 for applying a γ-ray inside a container in which char CH is stored; a ceiling part detector 59 which is provided at a ceiling part 52d of the container, and which detects the γ-ray emitted from the cylindrical part radiation source 57; and a controller 80 for obtaining a measurement value obtained at the ceiling part detector 59, so as to calculate a physical amount of the char CH. A powder supply hopper 52 includes the powder measurement device 50, a cone part radiation source 55, and a cone part detector 56.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a powder measuring device, a powder supply hopper, a gasification furnace facility, a combined gasification combined cycle facility, and a powder measurement method.

  As a method for measuring the physical quantity of powder stored in a container (for example, powder volume, powder mass, powder bulk density, storage height, etc.), a measuring means using γ-ray is known. (Patent Documents 1 and 2 below). Patent Literature 1 discloses that a γ-ray irradiation device and a γ-ray detector are provided outside a container containing powder to measure the density of powder and the storage height of powder. Patent Literature 2 discloses that when measuring char (powder) stored in a char supply hopper of a char (unreacted portion and ash) of a charcoal provided in a gasification furnace, a gamma ray is irradiated. The use of a gamma ray detector and a gamma ray detector is disclosed.

  Gasification furnace equipment is a carbon-containing fuel gasification facility that supplies combustible solid fuel such as coal into the gasifier and partially combusts and gasifies the carbon-containing solid fuel to produce flammable gas. (Coal gasification equipment) is known.

JP-A-10-222274 Japanese Patent No. 5859339

  However, the gamma ray detectors described in Patent Documents 1 and 2 are arranged above the container, but cannot measure up to the top of the container. In this case, the powder that has reached the uppermost part of the container cannot be measured, and the volume in which the powder can be stored is limited, and there is a problem that the hopper becomes large.

  Patent Document 1 does not assume measurement in a state where the inside of the container is pressurized. On the other hand, in the gasification furnace equipment, a pressure vessel is used because the pressure is high inside, and the wall thickness of the vessel becomes thick. For this reason, when the γ-ray source and the γ-ray detector are arranged outside the container as in Patent Document 1, a strong γ-ray source is required, and there is a problem that a safety measure is separately required.

With respect to powder property changes (for example, property changes such as bulk density due to changes in the coal type of carbon-containing solid fuel such as coal and changes in operating conditions), the gamma-ray detector If each calibration curve with the signal is not stored in advance, the measurement accuracy may be reduced.
In addition, when the powder is dispensed from the container, the stored state of the powder fluctuates due to the fluidizing gas from the lower part of the container and is not stable. For this reason, there is a problem that the measurement accuracy is reduced if the powder is fluidized during the measurement of the powder.

  The present invention has been made in view of such circumstances, and a powder measuring device, a powder supply hopper, and a gasification furnace facility capable of measuring even if powdered fuel reaches the top of a container. And a combined gasification combined cycle facility and a powder measuring method.

  Further, the present invention is capable of correcting a change in the property of the powder, and a powder measuring device, a powder supply hopper, a gasification furnace facility and a powder measuring device capable of accurately measuring the powder fuel in a stable state. It is an object of the present invention to provide an integrated gasification combined cycle facility and a powder measuring method.

  The powder measurement device according to one aspect of the present invention includes a radiation source unit that irradiates γ-rays into a container in which powdered fuel is stored, and a radiation source unit that is provided on a ceiling of the container and radiates from the radiation source unit. And a control unit that obtains a measurement value obtained by the ceiling detection unit and calculates a physical quantity of the powdered fuel.

The powder fuel is, for example, a powder containing a carbon-containing fuel component, and more specifically, a powder containing char, pulverized coal, fine powder obtained by pulverizing biomass fuel, and the like. Hereinafter, "powder fuel" may be abbreviated as "powder".
By detecting the γ-rays emitted from the radiation source by the detection unit, it is possible to obtain information on attenuation of the γ-rays due to the powder. The control unit performs a calculation based on this information to obtain a physical quantity of the powder. The physical quantity of the powder includes, for example, the volume of the powder, the mass of the powder, the bulk density of the powder, the storage height, and the like.
The detector is provided on the ceiling of the container and detects γ-rays emitted from the radiation source. Even if the storage height of the powder stored in the container reaches the top (near the ceiling), You can measure your body. As a result, the volume in the container can be used without waste for storing the powder, and there is no need to increase the size of the container.

  Further, the powder supply hopper according to one embodiment of the present invention is provided with the above-described powder measuring device, the container provided with the powder measuring device, and a vertically lower side of the container, and a vertically lower side. A cone portion having a shape reduced in diameter toward the front, a powder outlet portion provided at a lower end of the cone portion and supplying powder to the outside of the container, and a cone provided in the cone portion to irradiate gamma rays And a cone section detector for detecting γ-rays emitted from the cone section source section, wherein the control section performs measurement performed by the cone section detector. The measured value obtained by the detection unit is corrected using the value.

A cone portion is provided vertically below the container of the powder supply hopper. A powder outlet is provided at the lower end of the cone, and powder is supplied from a powder supply hopper such as a gasifier to other equipment. The cone section is provided with a cone section source section and a cone section detection section. That is, the cone source and the cone detector are provided immediately above the powder outlet, and this region is a region where the powder always exists with a high probability. Therefore, the powder can always be detected by the cone part radiation source part and the cone part detection part. Therefore, the control section uses the measurement value of the cone section detection section as the measurement value for correcting the physical quantity of the powder. Thereby, the measurement accuracy of the physical quantity of the powder can be improved.
It is preferable that the cone source and the cone detector are provided at substantially the same height in the horizontal direction.

  Further, in the powder supply hopper according to one aspect of the present invention, a powder inlet for receiving the powder fuel into the container, and an outlet valve for flowing out and stopping the powder fuel passing through the powder outlet. The control unit, the outlet valve is in a closed state and from the start of receiving the powder fuel from the powder inlet into the container from the powder inlet, before the outlet valve is in the open state The measurement values obtained by the other detection units are corrected using the measurement values obtained by the cone detection unit.

  While receiving the powder with the outlet valve closed, the powder is not disturbed at the powder outlet, so that the measurement accuracy can be maintained. On the other hand, when the outlet valve is opened, turbulence (flow) of the powder occurs at the powder outlet, and there is a possibility that the measurement accuracy is reduced. Thus, the measurement was performed from the time when the powder was started to be received from the powder inlet to the container with the outlet valve closed and before the outlet valve was opened.

  Further, in the powder supply hopper according to one aspect of the present invention, the control unit may further include: the cone unit after the reception of the powder into the container from the powder inlet that receives the powder fuel into the container is completed. The measurement value obtained by the detection unit is corrected using the measurement value obtained by the detection unit.

  After the reception of the powder from the powder inlet into the container is completed, the state of the powder in the container is relatively settled. By measuring at this timing, the measurement accuracy can be further increased.

  Furthermore, the powder supply hopper according to one aspect of the present invention includes a pressurized gas supply unit that supplies a gas into the container and pressurizes the gas, and the control unit is supplied with the gas from the pressurized gas supply unit. The measurement value of the detection unit is corrected using the measurement value obtained by the detection unit for the cone unit obtained before the detection.

  The container is provided with a pressurized gas supply unit for supplying gas to pressurize the inside of the container. When the powder stored in the container is fluidized by supplying the gas from the pressurized gas supply unit, the measurement value of the cone unit detection unit may become unstable. Therefore, measurement was performed before gas was supplied from the pressurized gas supply unit. Thereby, it is possible to avoid the measurement at the timing when the powder is fluidized and the measurement accuracy is reduced.

  Furthermore, in the powder supply hopper according to one aspect of the present invention, the control unit performs the calculation using a plurality of measurement values measured a plurality of times at predetermined time intervals.

  By calculating using a plurality of measured values, it is possible to cope with a case where an error is included in any of the measured values for a plurality of times due to a change in operating conditions. For example, by using the average value of the measured values for a predetermined number of times, it is possible to suppress the influence of the variation in the measured values and to more accurately capture the influence of the change in the type of powder. For example, a change in coal type of coal may be mentioned.

  Further, in the powder supply hopper according to one aspect of the present invention, a plurality of the containers provided with the powder measuring device are provided, and the control unit performs measurement of the detection unit in each of the plurality of containers. Calculate using values.

  Since the measured values of the plurality of containers are used, when a plurality of containers are used, for example, it is possible to cope with a case where the type of powder changes without causing a large error. For example, by using the average value of the measured values of a plurality of containers, the influence of the change in the type of powder can be suppressed. Examples of the change in the type of the powder include a change in the coal type of coal.

  Further, in the powder supply hopper according to one aspect of the present invention, the control unit outputs an alarm when a difference between the physical quantity of the powder fuel and the stored physical quantity in the past is equal to or greater than a predetermined value. .

  When the difference between the physical quantity of the powder and the stored past physical quantity is equal to or greater than a predetermined value, it is determined that an abnormality of the device is estimated and an alarm is output.

  Further, in the powder supply hopper according to one aspect of the present invention, the control unit outputs an alarm when the physical quantity of the powder and / or the changing speed of the physical quantity is out of a predetermined range.

  When the physical quantity of the powder deviates from the predetermined range, it is determined that the device is abnormal and an alarm is output. For example, when the physical quantity is the change rate of the powder storage height, it is assumed that an abnormality has occurred in the powder receiving system or the powder supply system, and an alarm is output.

  In addition, the gasification furnace equipment according to one embodiment of the present invention includes a powder supply hopper described in any of the above, and a gasification furnace that gasifies powder guided from the powder supply hopper. Have.

  In addition, the integrated gasification combined cycle power plant according to one aspect of the present invention, the gasification furnace equipment described above, and a gas turbine that is rotationally driven by burning at least a part of the generated gas generated in the gasification furnace equipment, A steam turbine that is driven to rotate by steam generated by an exhaust heat recovery boiler that introduces turbine exhaust gas discharged from the gas turbine; and a generator that is rotationally connected to the gas turbine and / or the steam turbine. .

  Further, the powder measuring method according to one embodiment of the present invention, irradiating the container with powder fuel stored therein with γ-rays, detecting the irradiated γ-rays at the ceiling of the container, and detecting Obtain the measured value and calculate the physical quantity of the powder fuel.

  Further, the powder measuring method according to one aspect of the present invention includes irradiating a container in which the powder fuel is stored with γ-rays, obtaining a measurement value obtained by detecting the irradiated γ-rays, A powder measuring method for calculating the physical quantity of the powder fuel, wherein an outlet valve for flowing and stopping the powder fuel is closed, and a powder inlet port for receiving the powder fuel into the container and into the container. The calculation is performed using the measured value obtained from the start of receiving the powdered fuel before the outlet valve is opened.

  Further, in the powder measurement method according to one embodiment of the present invention, calculation is performed using a plurality of measurement values measured a plurality of times at predetermined time intervals.

  Since the detection unit is provided on the ceiling of the container, the powder can be measured even when the storage height of the powder fuel stored in the container reaches the uppermost part.

  Correction can also be made for powder fuel property changes, and measure powder while the outlet valve for supplying powder from a powder supply hopper such as a gasifier to other equipment is closed. Therefore, the powder fuel can be measured with high accuracy.

It is a schematic structure figure showing the integrated coal gasification combined cycle equipment concerning a 1st embodiment of the present invention. FIG. 2 is a longitudinal sectional view showing a schematic configuration of the gasification furnace of FIG. 1. FIG. 2 is a longitudinal sectional view illustrating a schematic configuration of a supply hopper of FIG. 1. FIG. 4 is a schematic diagram illustrating an electric signal output by a detection unit in FIG. 3. 4 is a flowchart illustrating a detection process using the detection unit in FIG. 3. It is a flow chart which showed a detection process using a detection part concerning a 2nd embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[First Embodiment]
Hereinafter, a first embodiment of the present invention will be described.

[Coal gasification combined cycle power plant]
FIG. 1 shows a schematic configuration of an integrated coal gasification combined cycle (IGCC) 10 to which a gasifier facility 14 is applied, as an example of a combined gasification facility. The integrated coal gasification combined cycle system 10 uses air as an oxidant mainly, and employs an air combustion system that generates a combustible gas (product gas) from fuel in the gasification furnace facility 14. Then, the integrated coal gasification combined cycle facility 10 purifies the generated gas generated in the gasification furnace facility 14 by the gas purification facility 16 to obtain a fuel gas, and then supplies the fuel gas to the gas turbine 17 to generate power. That is, the integrated coal gasification combined cycle power plant 10 is a power plant of an air combustion system (air blowing). As the fuel to be supplied to the gasification furnace equipment 14, for example, a carbon-containing solid fuel such as coal is used.
In the present embodiment, the upper side indicates the upward direction in the vertical direction, and the lower side indicates the downward direction in the vertical direction. The height indicates the position of the height in the vertical direction.

  The integrated coal gasification combined cycle power plant 10 includes a coal feed facility 11, a gasifier facility 14, a char recovery facility 15, a gas purification facility 16, a gas turbine 17, a steam turbine 18, a generator 19, A heat recovery steam generator (HRSG) 20 is provided.

  The coal supply equipment 11 is supplied with coal as a carbon-containing solid fuel as raw coal, and pulverizes the coal with a coal mill (not shown) or the like to produce pulverized coal pulverized into fine particles. The pulverized coal produced by the coal supply facility 11 is pressurized at the outlet of the coal supply line 11a by nitrogen gas as an inert gas for conveyance supplied from an air separation facility (ASU) 42, which will be described later, to the gasifier facility 14. Supplied to. The inert gas is an inert gas having an oxygen content of about 5% by volume or less, and typical examples include nitrogen gas, carbon dioxide gas, and argon gas, but are not necessarily limited to about 5% by volume or less. .

  The gasification furnace equipment 14 is supplied with the pulverized coal produced in the coal supply equipment 11 and the char (unreacted portion and ash content) recovered in the char recovery equipment 15 for reuse. I have.

  Further, a compressed air supply line 41 from the gas turbine 17 (compressor 61) is connected to the gasification furnace equipment 14, and a part of the compressed air compressed by the gas turbine 17 is compressed by the booster 68 to a predetermined pressure. , And can be supplied to the gasification furnace equipment 14. The air separation equipment 42 separates and generates nitrogen and oxygen from air in the atmosphere, and the air separation equipment 42 and the gasification furnace equipment 14 are connected by a first nitrogen supply line 43. The first nitrogen supply line 43 is connected to a coal supply line 11a from the coal supply facility 11. Further, a second nitrogen supply line 45 branched from the first nitrogen supply line 43 is also connected to the gasification furnace equipment 14, and a char return line 46 from the char recovery equipment 15 is connected to the second nitrogen supply line 45. It is connected. Further, the air separation equipment 42 is connected to the compressed air supply line 41 by an oxygen supply line 47. The nitrogen separated by the air separation equipment 42 flows through the first nitrogen supply line 43 and the second nitrogen supply line 45, and is used as a carrier gas for coal or char. The oxygen separated by the air separation facility 42 flows through the oxygen supply line 47 and the compressed air supply line 41 to be used as an oxidant in the gasification furnace facility 14.

  The gasification furnace equipment 14 includes, for example, a two-stage spouted bed type gasification furnace 101 (see FIG. 2). The gasification furnace equipment 14 gasifies by partially burning coal (pulverized coal) and char supplied therein with an oxidizing agent (air, oxygen) to produce gas. The gasification furnace equipment 14 is provided with a foreign matter removal equipment 48 for removing foreign matter (slag) mixed in the pulverized coal. The gasification furnace equipment 14 is connected to a gas generation line 49 for supplying a generated gas to the char recovery equipment 15 so that the generated gas including the char can be discharged. In this case, as shown in FIG. 2, by providing a syngas cooler 102 (heat exchanger) in the gas generation line 49, the generated gas may be cooled to a predetermined temperature and then supplied to the char recovery facility 15.

  The char collection facility 15 includes a dust collection facility 51 and a supply hopper (powder supply hopper) 52. In this case, the dust collection equipment 51 is configured by one or more cyclones or porous filters, and can separate the char contained in the generated gas generated by the gasification furnace equipment 14. Then, the generated gas from which the char has been separated is sent to the gas purification facility 16 through the gas discharge line 53. The supply hopper 52 stores the char separated from the generated gas in the dust collecting facility 51. A bin (powder supply hopper) may be arranged between the dust collecting facility 51 and the supply hopper 52, and a plurality of supply hoppers 52 may be connected to the bin. The char return line 46 from the supply hopper 52 is connected to the second nitrogen supply line 45.

The gas purification equipment 16 performs gas purification by removing impurities such as sulfur compounds and nitrogen compounds from the product gas from which the char has been separated by the char recovery equipment 15. Then, the gas purification equipment 16 purifies the produced gas to produce a fuel gas, and supplies the gas to the gas turbine 17. Since the product gas from which the char has been separated still contains sulfur (H ₂ S, etc.), the gas purification equipment 16 removes and recovers the sulfur using an amine absorbing solution or the like, thereby effectively utilizing the sulfur. I do.

  The gas turbine 17 includes a compressor 61, a combustor 62, and a turbine 63. The compressor 61 and the turbine 63 are connected by a rotating shaft 64. The combustor 62 is connected to a compressed air supply line 65 from the compressor 61, a fuel gas supply line 66 from the gas purification facility 16, and a combustion gas supply line 67 extending toward the turbine 63. Is connected. Further, the gas turbine 17 is provided with a compressed air supply line 41 extending from the compressor 61 to the gasification furnace equipment 14, and a booster 68 is provided in the middle. Therefore, the combustor 62 generates a combustion gas by mixing and burning a part of the compressed air supplied from the compressor 61 and at least a part of the fuel gas supplied from the gas purification facility 16, and The generated combustion gas is supplied to the turbine 63. Then, the turbine 63 drives the generator 19 to rotate by rotating the rotating shaft 64 with the supplied combustion gas.

  The steam turbine 18 includes a turbine 69 connected to a rotation shaft 64 of the gas turbine 17, and the generator 19 is connected to a base end of the rotation shaft 64. The exhaust heat recovery boiler 20 is connected to an exhaust gas line 70 from the gas turbine 17 (turbine 63), and performs heat exchange between water supplied to the exhaust heat recovery boiler 20 and exhaust gas from the turbine 63 to generate steam. Is generated. The exhaust heat recovery boiler 20 is provided with a steam supply line 71 and a steam recovery line 72 between the turbine 69 of the steam turbine 18 and a condenser 73 in the steam recovery line 72. Further, the steam generated by the exhaust heat recovery boiler 20 may include steam generated by performing heat exchange with the generated gas in the syngas cooler 102 of the gasification furnace 101. Therefore, in the steam turbine 18, the turbine 69 is rotationally driven by the steam supplied from the exhaust heat recovery boiler 20, and the generator 19 is rotationally driven by rotating the rotating shaft 64.

  Further, a gas purification facility 74 is provided from the outlet of the exhaust heat recovery boiler 20 to the chimney 75.

  Next, the operation of the integrated coal gasification combined cycle facility 10 will be described.

  In the integrated coal gasification combined cycle facility 10, when raw coal (coal) is supplied to the coal supply facility 11, the coal is pulverized into fine particles in the coal supply facility 11 to be pulverized coal. The pulverized coal produced in the coal supply facility 11 is supplied to the gasification furnace facility 14 through the first nitrogen supply line 43 by the nitrogen supplied from the air separation facility 42. In addition, the char recovered by the char recovery facility 15 described later is supplied to the gasification furnace facility 14 by flowing through the second nitrogen supply line 45 with nitrogen supplied from the air separation facility 42. Further, after the compressed air extracted from the gas turbine 17 to be described later is pressurized by the booster 68, the compressed air is supplied to the gasification furnace facility 14 through the compressed air supply line 41 together with the oxygen supplied from the air separation facility 42.

  In the gasification furnace equipment 14, the supplied pulverized coal and char are burned by compressed air (oxygen), and the pulverized coal and char are gasified to generate a product gas. Then, the generated gas is discharged from the gasification furnace equipment 14 through the gas generation line 49 and sent to the char recovery equipment 15.

  In the char recovery facility 15, the generated gas is first supplied to the dust collection facility 51, whereby fine char contained in the generated gas is separated. Then, the generated gas from which the char has been separated is sent to the gas purification facility 16 through the gas discharge line 53. On the other hand, fine char separated from the product gas is deposited on the supply hopper 52, returned to the gasification furnace facility 14 through the char return line 46, and recycled.

  The product gas from which the char has been separated by the char recovery facility 15 is subjected to gas purification in a gas purification facility 16 by removing impurities such as sulfur compounds and nitrogen compounds, thereby producing a fuel gas. A compressor 61 generates compressed air and supplies it to a combustor 62. The combustor 62 mixes the compressed air supplied from the compressor 61 and the fuel gas supplied from the gas purification facility 16 and generates combustion gas by burning. By rotating the turbine 63 with the combustion gas, the compressor 61 and the generator 19 are rotationally driven via the rotary shaft 64. Thus, the gas turbine 17 can generate electric power.

Then, the exhaust heat recovery boiler 20 generates steam by performing heat exchange between the exhaust gas discharged from the turbine 63 in the gas turbine 17 and the feedwater, and supplies the generated steam to the steam turbine 18. In the steam turbine 18, by rotating the turbine 69 with the steam supplied from the exhaust heat recovery boiler 20, the generator 19 can be rotationally driven via the rotating shaft 64 to generate power.
The gas turbine 17 and the steam turbine 18 do not have to rotate one generator 19 on the same shaft, and may rotate a plurality of generators on another shaft.

  Thereafter, in the gas purification equipment 74, harmful substances of the exhaust gas discharged from the exhaust heat recovery boiler 20 are removed, and the purified exhaust gas is released from the chimney 75 to the atmosphere.

  Next, with reference to FIG. 1 and FIG. 2, the gasification furnace equipment 14 in the integrated coal gasification combined cycle power generation equipment 10 will be described in detail. FIG. 2 is a schematic configuration diagram showing the gasification furnace equipment of FIG.

  The gasification furnace equipment 14 includes a gasification furnace 101 and a syngas cooler 102, as shown in FIG.

  The gasification furnace 101 is formed to extend in the vertical direction, and pulverized coal and oxygen are supplied to the lower side in the vertical direction, and the product gas partially burned and gasified flows upward from the lower side in the vertical direction. It is distributed. The gasification furnace 101 has a pressure vessel 110 and a gasification furnace wall (furnace wall) 111 provided inside the pressure vessel 110. The gasification furnace 101 forms an annulus 115 in a space between the pressure vessel 110 and the gasification furnace wall 111. Further, in the space inside the gasification furnace wall 111, the gasification furnace 101 includes, in order from the lower side in the vertical direction (that is, the upstream side in the flow direction of the generated gas), the combustor section 116, the diffuser section 117, and the reducer section 118. Is formed.

  The pressure vessel 110 is formed in a cylindrical shape having a hollow space inside, and has a gas discharge port 121 formed at an upper end, and a slag hopper 122 formed at a lower end (bottom). The gasification furnace wall 111 is formed in a cylindrical shape having a hollow space inside, and the wall surface is provided to face the inner surface of the pressure vessel 110. In this embodiment, the pressure vessel 110 has a cylindrical shape, and the diffuser portion 117 of the gasification furnace wall 111 is also formed in a cylindrical shape. The gasification furnace wall 111 is connected to the inner surface of the pressure vessel 110 by a support member (not shown).

  The gasification furnace wall 111 separates the inside of the pressure vessel 110 into an internal space 154 and an external space 156. As will be described later, the gasification furnace wall 111 has such a shape that the cross-sectional shape changes at the diffuser 117 between the combustor 116 and the reducer 118. The gasification furnace wall 111 has a vertically upper side upper end connected to the gas discharge port 121 of the pressure vessel 110, and a vertically lower side lower end provided with a gap from the bottom of the pressure vessel 110. ing. In the slag hopper 122 formed at the bottom of the pressure vessel 110, stored water is stored, and the lower end of the gasification furnace wall 111 is submerged in the storage water to seal the inside and outside of the gasification furnace wall 111. Stopped. Burners 126 and 127 are inserted into the gasification furnace wall 111, and the syngas cooler 102 is disposed in the internal space 154. The structure of the gasification furnace wall 111 will be described later.

  The annulus portion 115 is a space formed inside the pressure vessel 110 and outside the gasification furnace wall 111, that is, an external space 156. Nitrogen, which is an inert gas separated by the air separation facility 42, is not shown. It is supplied through a supply line. Therefore, the annulus portion 115 is a space filled with nitrogen. A pressure equalizing pipe (not shown) for equalizing the inside of the gasification furnace 101 is provided near the upper portion of the annulus 115 in the vertical direction. The in-furnace equalizing tube is provided so as to communicate between the inside and outside of the gasification furnace wall 111, and the pressure between the inside (combustor unit 116, diffuser unit 117, and reducer unit 118) of the gasification furnace wall 111 and the outside (annulus unit 115) The pressure is substantially equalized so that the difference is within a predetermined pressure.

  The combustor unit 116 is a space for partially burning pulverized coal, char, and air, and a combustion device including a plurality of burners 126 is disposed on the gasification furnace wall 111 of the combustor unit 116. The high-temperature combustion gas obtained by burning the pulverized coal and part of the char in the combustor unit 116 passes through the diffuser unit 117 and flows into the reducer unit 118.

  The reductor unit 118 is maintained at a high temperature required for the gasification reaction, supplies pulverized coal to the combustion gas from the combustor unit 116 and partially burns the pulverized coal to remove volatile matter (carbon monoxide, hydrogen, lower hydrocarbons, etc.). ) Is gasified and gasified to generate product gas, and a combustion device including a plurality of burners 127 is disposed on the gasification furnace wall 111 in the reducer section 118.

  The syngas cooler 102 is provided inside the gasification furnace wall 111 and is provided above the burner 127 of the reducer section 118 in the vertical direction. The syngas cooler 102 is a heat exchanger. The evaporator (evaporator) 131, the superheater (super heater) 132, and the nodes are arranged in this order from the lower side in the vertical direction of the gasification furnace wall 111 (upstream in the flow direction of the generated gas). A charcoal (economizer) 134 is provided. These syngas coolers 102 cool the generated gas by performing heat exchange with the generated gas generated in the reducer section 118. Further, the numbers of the evaporators (evaporators) 131, the superheaters (super heaters) 132, and the economizers (economizers) 134 are not limited to those shown in the drawings.

Next, the operation of the gasification furnace equipment 14 will be described.
In the gasification furnace 101 of the gasification furnace equipment 14, nitrogen and pulverized coal are injected and ignited by the burner 127 of the reducer unit 118, and pulverized coal, char and compressed air (oxygen) are converted by the burner 126 of the combustor unit 116. It is turned on and ignited. Then, in the combustor section 116, high-temperature combustion gas is generated by the combustion of the pulverized coal and the char. Further, in the combustor section 116, molten slag is generated in the high-temperature gas by the combustion of the pulverized coal and the char, and the molten slag adheres to the gasification furnace wall 111, falls to the furnace bottom, and finally enters the slag hopper 122. Discharged into the reservoir. Then, the high-temperature combustion gas generated in the combustor section 116 rises to the reducer section 118 through the diffuser section 117. In the reducer section 118, the high temperature state required for the gasification reaction is maintained, the pulverized coal is mixed with the high-temperature combustion gas, and the pulverized coal is partially burned in a high-temperature reducing atmosphere to perform the gasification reaction. Is generated. The gasified product gas flows from the lower side in the vertical direction to the upper side.

[Powder supply hopper]
Next, in this embodiment, the supply hopper 52 that stores the char CH as the powder fuel will be described.
FIG. 3 shows the supply hopper 52. The supply hopper 52 is a pressure vessel whose inside is pressurized. For example, the internal pressure changes from atmospheric pressure to 0.1 MPa to 5 MPa (gauge pressure). The supply hopper 52 includes a cone portion 52b having an outlet portion 52a positioned vertically below connected to a lower end, a cylindrical portion 52c connected to an upper end of the cone portion 52b, and a ceiling portion connected to an upper end of the cylindrical portion 52c. 52d.

  The outlet portion 52a has a cylindrical shape in which the lower end portion in the vertical direction is closed, is vertically lower than the cone portion 52b, and has a constant horizontal cross-sectional area along the vertical direction. It is conveyed to the gasification furnace equipment 14 via the char return line 46. The char CH in the supply hopper 52 is discharged to the gasification furnace equipment 14 through the outlet 52a. An outlet valve 54 (for example, an on-off valve) is provided downstream of the outlet 62a, and is controlled by a control unit 80 as the powder measuring device 50.

  The cone portion 52b has a substantially conical shape whose diameter decreases as it goes vertically downward. The cone section 52b is provided with a cone section source section 55 as the powder measuring device 50 and a cone section detection section 56.

  The cone source 55 is a source for irradiating γ rays, and is provided so as to irradiate γ rays mainly in the horizontal direction. Specifically, the radiation source is installed in a sheath tube inserted into the supply hopper 52 with the tip directed horizontally in the cone portion 52b. The cone part source 55 irradiates γ-rays in a plurality of directions including the vertical direction in addition to the horizontal direction, so that the cylindrical detector part 58 described later can measure the vertical direction. It may be.

  The cone section detecting section 56 is a detecting section that detects γ-rays, and is provided so as to mainly detect γ-rays emitted from the horizontal direction. Specifically, the detector is installed in a sheath tube inserted into the supply hopper 52 with the tip directed horizontally in the cone portion 52b. The electric signal output from the cone detecting section 56 is transmitted to the control section 80.

  The cone portion source 55 and the cone detector 56 are provided so as to substantially oppose each other and at substantially the same height. The distance L1 between the cone portion source 55 and the cone detector 56 is stored in the control unit 80 as a known value. The height positions of the cone part source 55 and the cone detector 56 are always set to the height positions where the char CH is stored. Specifically, when the outlet portion 52a communicates with the downstream side, a height equal to or higher than the height at which gas is constantly deposited from the downstream side (vertically below in FIG. 3) so as not to blow through the layer of the char CH ( For example, as shown in FIG. 3, the height is lower than the minimum char storage height H1 ′ set in the cone portion 52b). Therefore, the height position of the cone part source 55 and the cone part detection part 56 is a position where the char CH is stored even when the char is paid out or even when the payout is completed. . Thus, the output of the cone detecting unit 56 can be used as a correction bulk density described later.

  A pressurized gas supply section 82 for pressurizing the inside of the supply hopper 52 is provided in the cone section 52b. As the pressurized gas, nitrogen gas is used in the present embodiment.

  The cone portion 52b is provided with a fluidizing gas supply portion 83 for fluidizing the char CH stored in the cone portion 52b. As the fluidizing gas, for example, nitrogen gas is used. With the fluidizing gas, a gas for transport is additionally supplied into the cone portion 52b to promote fluidization of the stored char CH so that the char CH can be smoothly dispensed.

  The cylindrical portion 52c has a cylindrical shape having a central axis extending in the vertical direction. The inner volume formed by the cylindrical portion 52c occupies the largest portion of the inner volume of the supply hopper 52. On the side of the cylindrical portion 52c, a cylindrical portion radiation source portion 57 and a cylindrical portion detecting portion 58 as the powder measuring device 50 are provided. The cylindrical section radiation source section 57 is provided vertically above the cylindrical section detection section 58 and at a position substantially coincident with the vertical direction.

The cylindrical portion source 57 is a source for irradiating γ-rays, and is provided so as to irradiate γ-rays mainly in two vertical directions. Specifically, the radiation source is installed in a sheath tube inserted into the supply hopper 52 with the tip directed horizontally in the cylindrical portion 52c.
The detection part 58 for a cylindrical part is a detection part which detects γ-rays, and is provided so as to mainly detect γ-rays irradiated from the vertically upper side. Specifically, the detector is installed in a sheath tube inserted into the supply hopper 52 with the tip directed horizontally in the cylindrical portion 52c. The output of the detection part 58 for a cylindrical part is transmitted to the control part 80.
The distance L2 between the cylindrical part source 57 and the cylindrical part detector 58 is stored in the controller 80 as a known value.
In addition, you may make it provide the several detection part 58 for cylindrical parts in a different height position. In this case, the measurement is performed by each of the detection sections 58 for the cylindrical portion, and these are integrated (for example, integrated) to output a measurement result such as the char storage height.

The ceiling 52d is a head plate provided so as to cover the upper end of the cylindrical portion 52c. The ceiling detecting section 59 is provided on the ceiling 52d. The ceiling detection unit 59 is a detection unit that detects γ-rays, and is provided so as to mainly detect γ-rays emitted from below vertically. Specifically, the detector is installed in a sheath tube whose tip is inserted vertically downward into the supply hopper 52 in the ceiling 52d. The output of the ceiling detector 59 is transmitted to the controller 80.
The distance L3 between the cylindrical section source section 57 and the ceiling section detection section 59 is stored in the control section 80 as a known value.

  An entrance 52e for receiving the char CH is provided in the ceiling 52d. The char CH is guided into the supply hopper 52 through the inlet 52e.

  In addition, the cone part source 55 irradiates γ-rays in two directions including the vertical direction in addition to the horizontal direction, so that the cylindrical detector part 58 can measure the vertical direction. It may be. Further, the gamma ray may be irradiated in two directions, that is, the horizontal direction and the vertically upward direction, by changing the direction by approximately 90 ° and vertically upward. The distance L4 between the cone source 55 and the cylindrical detector 58 is stored in the controller 80 as a known value. Thereby, the measurement can be performed by the detection unit 58 for the cylindrical portion and / or the detection unit 59 for the ceiling portion using the γ-rays radiated from the cone source 55. In addition, the filling height of the char necessary for measuring the correction bulk density by the cone portion detection unit 56 can be reduced, and as a result, the volume of the cone portion 52b can be effectively used, and the correction bulk density can be measured. It is not necessary to separately add the cone source 55.

  The control unit 80 includes, for example, a CPU (Central Processing Unit), a RAM (Random Access Memory), a ROM (Read Only Memory), and a computer-readable storage medium. For example, a series of processes for realizing various functions are stored in a storage medium or the like in the form of a program as an example, and the CPU reads the program into a RAM or the like, and executes information processing and arithmetic processing. Thereby, various functions are realized. The program may be installed in advance in a ROM or other storage medium, provided in a state stored in a computer-readable storage medium, or delivered via a wired or wireless communication unit. Etc. may be applied. The computer-readable storage medium is a magnetic disk, a magneto-optical disk, a CD-ROM, a DVD-ROM, a semiconductor memory, or the like.

The control unit 80 stores a calibration curve for obtaining the bulk density of the char CH using the output (electric signal) obtained from each of the detection units 56, 58, and 59. FIG. 4 shows an example of the calibration curve. The calibration curve can be verified and prepared in advance. As shown in the figure, the γ-rays are attenuated by the density of the char CH existing between the radiation source units 55 and 57 and the detection units 56, 58 and 59, and the electric power obtained from each of the detection units 56, 58 and 59 is obtained. The signal changes. For example, when the presence density of the char CH is high, the electric signal is attenuated and becomes small, and when the presence density of the char CH is low, the electric signal becomes large.
The output (electric signal) obtained from each of the detection units 56, 58, and 59 includes a calibration curve for obtaining the bulk density in the detection units 56, 58, and 59, and transmits the value of the bulk density directly to the control unit 80. Is also good.

<Char storage height H1>
The char storage height H1 is calculated as follows.
Even if the electric signals obtained from the detection units 56, 58, and 59 have the same intensity (that is, the same apparent density), if the actual bulk density of the char CH is different, the char storage height H1 Will be different. In order to reduce the error caused by the bulk density, the output of the cone detection unit 56 that detects the γ-ray emitted from the cone source 55 is used as the correction bulk density. The bulk density can be obtained from the volume calculated using the distances L1, L2, L3, and L4 in the height direction between the radiation sources 55 and 57 and the detectors 56, 58 and 59.
Therefore, the char storage height H1 is obtained from the following equation.
[Char storage height H1 (m)]
= [Bulk density obtained from detection units 58 and 59 (kg / m ³ )]
× [Difference in height between source and detector (m)] ÷ [Bulk density for correction (kg / m ³ )]

  Note that the correction bulk density may use the region filled with the char CH, and may use the cylindrical portion 52c instead of the cone portion 52b. The cone section source section 55 and the cone section detection section 56 are provided at such a height that the char CH is always deposited to such an extent that the high pressure gas in the supply hopper 52 does not blow through the layer of the char CH. It is preferable for calculating bulk density.

<Char volume>
By preparing a calibration curve of the char volume (m ³ ) corresponding to the char storage height H1 in the supply hopper 52 in advance and storing it in the control unit 80, the char storage height H1 is converted into the char volume. It becomes possible to convert. For example, in the cylindrical portion 52c of the supply hopper 52, the char volume has a first-order correlation with the char storage height H1, and the calibration curve is a straight line. On the other hand, in the cone portion 52b of the supply hopper 52, the char volume has a third-order correlation with the char storage height H1, and the calibration curve becomes a cubic curve.
[Charge volume of ceiling part (m ³ )] = [Container volume for char storage height of ceiling part (m ³ )]
[Char volume of cylindrical part (m ³ )] = [Volume of container (m ³ ) against char storage height of cylindrical part]
[Char volume of cone part (m ³ )] = [Container volume (m ³ ) for char storage height of cone part]
However,
[Char storage height H1 (m)] = [Char storage height of ceiling] + [Char storage height of cylindrical portion] + [Char storage height of cone]
Note that the relationship between the respective char storage heights of the ceiling portion 52d, the cylindrical portion 52c, and the cone portion 52b may be input in advance and calculated from the relational expression.

<Char mass>
The bulk densities obtained from the detectors 56, 58, and 59 in the respective areas of the ceiling 52d, the cylindrical portion 52c, and the cone 52b filled with the char CH, and each of the insides of the hopper calculated as described above. From the char volume (m ³ ) of the region and the correction bulk density, the char mass of each region is calculated as in the following equation. The char mass referred to here is not the mass of the char particles but the mass of the entire char stored in the supply hopper 52 hopper.
[Char Weight (kg)] = [Char volume (m ³⁾ of the ceiling portion] × [correcting bulk density (kg / m ^3)]
+ [Char volume (m ³⁾ of the cylindrical portion] × [correcting bulk density (kg / m ^3)]
+ [Char volume (m ³⁾ of the cone portion] × [correcting bulk density (kg / m ^3)]

<Measurement timing>
Next, measurement timing using the detection units 56, 58, and 59 will be described.
The supply hopper 52 starts receiving the char from the inlet 52e with the outlet valve 54 on the downstream side of the outlet 52a closed. Then, after the char storage height H1 reaches a predetermined amount, the char in the supply hopper 52 is discharged to the outside.

  Before discharging the char CH to the outside, a pressurized gas is supplied from the pressurized gas supply unit 82 into the supply hopper 52 and pressurized. In addition, a fluidizing gas is supplied from the fluidizing gas supply unit 83 to fluidize the lower part of the cone part 52b. At this time, the char CH stored in the supply hopper 52 is fluidized and disturbed, and the outputs of the detection units 56, 58, and 59 fluctuate, and the measurement accuracy is disturbed. Therefore, the measurement by the detection units 56, 58, and 59 is more preferably performed from the start of the reception of the char CH to the completion of the reception of the char CH and before the outlet valve 54 is opened. Perform before supply.

FIG. 5 shows a flowchart of the measurement process by the detection units 56, 58, and 59.
After the reception of the char CH into the supply hopper 52 is completed (step S1), the density of the char CH is measured by the detection units 56, 58, and 59 (step S2).

  Then, it is determined whether or not the number of times of measurement of the obtained measurement value is N or more (step S3). Here, N is an integer of 2 or more, and can be arbitrarily set by the user as a fixed value in the control unit 80. If the number of measurements is less than N (NO), the density measurement by the detection units 56, 58, and 59 is repeated. If the number of times of instrumentation is N or more (YES), the process proceeds to step S4, where the density measurement data for the latest N times are selected, and the bulk density average value of the char CH is calculated.

  Then, by using the average bulk density value, the bulk density is corrected by the above-described correction bulk density obtained by the cone portion detecting section 56 (step S5).

  The bulk density corrected in step S5 is used for calculating the mass of the char CH in step S6, and is used for calculating the char storage height H1. Further, the bulk density corrected in step S5 is stored in the control unit 80 as measurement data in step S7. The controller 80 also stores the char mass and the char storage height H1 calculated in step S6.

  The control unit 80 displays a GUI (Graphical User Interface) such as the mass of the char (step S9). The display unit is installed, for example, near the operator.

  In step S7, the change speed of the char storage height H1 is calculated from the char storage height H1 and the time at which the char is received, and stored in the control unit 80. The measurement data stored in the control unit 80 in step S7 is compared with the measurement data accumulated in the past in step S10, and whether the change speed of the bulk density or the char storage height H1 does not exceed a predetermined range. Judge. If the change rate of the bulk density or the height H1 exceeds a predetermined range (NO), an abnormal alarm is issued (step S11). If the change speed of the bulk density or the height H1 does not exceed the predetermined range (YES), the process returns to step S2 to continue the measurement. Here, the predetermined range of the bulk density and the predetermined range of the changing speed of the char storage height H1 can be appropriately set based on design values and actual operation values.

According to the present embodiment, the following operation and effect can be obtained.
A ceiling detection unit 59 is provided on the ceiling 52d of the supply hopper 52 to detect γ-rays emitted from the cylindrical radiation source unit 57. Thereby, even if the char storage height H1 of the char CH stored in the supply hopper 52 reaches the uppermost portion (near the ceiling 52d), the char CH can be measured. Therefore, the volume in the supply hopper 52 can be used without waste for storing the char CH, and there is no need to increase the size of the supply hopper 52.

  The cone section 52b is provided with a cone section source section 55 and a cone section detection section 56. The cone section source section 55 and the cone section detection section 56 are provided directly above the outlet section 52a, and are constantly deposited to such an extent that the high-pressure gas in the supply hopper 52 does not blow through the layer of the char CH. Area is provided, and this area is an area where the char CH always exists with a high probability. Therefore, for example, even when the charcoal type of pulverized coal is changed or the operating conditions are changed to change the properties of the char CH, the actual char CH is always detected by the cone source unit 55 and the cone detecting unit 56. It is possible to detect and measure the bulk density and the like. Therefore, the control unit 80 uses the measurement value of the cone unit detection unit 56 as the measurement value for correcting the physical quantity of the char CH. Thereby, the measurement accuracy of the physical quantity of the char CH can be improved.

  The detection units 56, 58, and 59 detect the time between when the reception of the char CH from the inlet 52 e to the supply hopper 52 and before the outlet valve 54 (not shown) on the downstream side of the outlet 52 a is opened. It was decided to measure. As a result, while receiving the char CH with the outlet valve 54 closed, the char CH is not disturbed in the cone portion 52b, so that the measurement accuracy can be maintained.

  Supplying gas from the pressurized gas supply unit 82 into the supply hopper 52 may cause fluidization of the char CH stored in the supply hopper 52. Therefore, before the pressurized gas is supplied from the pressurized gas supply unit 82, the measurement is performed by the detection units 56, 58, and 59. This makes it possible to avoid the measurement at the timing when the measurement accuracy decreases due to the fluidization of the char CH.

  The measurement was performed a plurality of times at a predetermined time interval, and the correction bulk density was calculated using the measured values N times or more. Accordingly, even when the operating conditions are changed during the measurement and an error is included in any of the N measured values, the correction bulk density can be calculated without causing a large error. The predetermined time for a plurality of measurements may be set so that the measurement can be performed N times from the start of the reception of the char CH to the completion of the reception and before the payout of the char CH is started. May be set by the measurement from before the completion of the acceptance and before the start of the payout of the char CH.

  By displaying the char mass and the like on a GUI (Graphical User Interface), the operator can confirm the char mass display that is familiar in the conventional operation as before, so that the monitoring accuracy of operation monitoring and the prediction of abnormalities are improved.

[Second embodiment]
Next, a second embodiment of the present invention will be described with reference to FIG. This embodiment is characterized in the measurement in the case where there are a plurality of supply hoppers 52 as compared with the first embodiment, and the other is the same as the first embodiment. Therefore, only the differences from the first embodiment will be described below.

  In the present embodiment, a plurality of supply hoppers 52 are provided like hoppers A, B, and C. These three hoppers A, B, and C are operated so as to continuously supply the char CH while sequentially switching, for example, one cycle from 30 minutes to 60 minutes. The number of hoppers may be two or more.

As shown in FIG. 6, after the supply hoppers 52 (hoppers A, B, and C) have completed receiving the char CH (step S1 '), the bulk density is measured in each of the hoppers A, B, and C (see FIG. 6). Step S2 ') is the same as in the first embodiment.
Then, in step S3 ', it is determined whether the number of times of measurement of the obtained measurement value is N or more (step S3'). Here, N is an integer of 2 or more, and can be set as a fixed value in the control unit 80. If the number of measurements is less than N (NO), a preset density (fixed value) is obtained from the control unit 80 (step S20), and is used as a substitute value of the density measurement value in step S21. If the number of times of measurement is N or more (YES), the process proceeds to step S21, and an average value is calculated using the bulk density measured values of the latest N times.

  Using the average bulk density measurement value obtained in step S21, the hoppers A, B, and C perform bulk density correction using the correction bulk density (step S5 '), and in step S22, hoppers A, B, and C. The average value of the bulk density after correction is calculated. The bulk density average value is stored in the control unit 80 as shown in step S7 of FIG. 5 (see reference numeral I), and the calculation of the char mass and the char storage height H1 as shown in step S6. Used for The bulk density average value is obtained from the data stored in the control unit 80 (see reference numeral II), and is used in step S10 '.

  In step 10 ′, the change rate of each char storage height H1 is calculated from the char storage height H1 of the hoppers A, B, and C and the time when each char CH is received, and stored in the control unit 80. In step S10 ', it is compared with the measurement data accumulated in the past, and it is determined whether or not the change rates of the bulk densities of the hoppers A, B, and C and the storage heights H1 of the chars do not exceed predetermined ranges. If the changing speed of each bulk density or each char storage height H1 exceeds a predetermined range (NO), an abnormal alarm is issued (S11 '). If the changing speed of each bulk density and each height H1 does not exceed the predetermined range (YES), the process returns to step S2 'and continues the measurement. Here, the predetermined range of each bulk density and the predetermined range of the changing speed of each char storage height H1 can be appropriately set from design values and actual operation values.

  According to the present embodiment, the measured values of the plurality of supply hoppers 52 (hoppers A, B, and C) are used. Therefore, when the plurality of hoppers A, B, and C are sequentially used, for example, pulverized coal is used. It is possible to cope with a change in species or operating conditions without causing a large error. More specifically, since the char CH is received and switched to the three hoppers A, B, and C, for example, every 30 to 60 minutes, the bulk density is calculated by the average value of the three times of completion of the char reception to the hoppers A, B, and C. Therefore, even when the coal type of pulverized coal is changed or the operating state of the gasifier is changed, and the properties of the char CH are changed, the bulk density is averaged over time. And the change of the operating state of the gasifier progresses with time, the correction of the bulk density can be followed until the char CH is replaced, while suppressing the fluctuation of the bulk density due to short-time disturbance be able to.

In each of the above embodiments, coal is used as a fuel. However, high-grade coal or low-grade coal can be used. The biomass used may be used. For example, it is also possible to use thinned wood, waste wood, driftwood, grass, waste, sludge, tires, and recycled fuel (pellets and chips) using these as raw materials. is there.
In addition, although the description has been made using the char CH as an example of the powder, a powder containing other powder fuel such as pulverized coal can also be applied.
Although the supply hopper 52 has been described as an example of the container for storing the powder, a bin provided between the dust collection facility 51 and the supply hopper 52 may be used, for example.

Reference Signs List 10 Coal gasification combined cycle power plant 11 Coal supply facility 11a Coal supply line 14 Gasifier facility 15 Char recovery facility 16 Gas purification facility 17 Gas turbine 18 Steam turbine 19 Generator 20 Waste heat recovery boiler (hot water supply unit)
41 compressed air supply line 42 air separation equipment (nitrogen supply unit)
43 First nitrogen supply line 45 Second nitrogen supply line 46 Char return line 47 Oxygen supply line 48 Foreign matter removal equipment 49 Gas generation line 50 Powder measuring device 51 Dust collection equipment 52 Supply hopper (powder supply hopper)
52a outlet (powder outlet)
52b Cone 52c Cylindrical 52d Ceiling 52e Inlet (powder inlet)
53 Gas exhaust line 54 Outlet valve 55 Cone source (source)
56 Detector for cone part 57 Source part for cylindrical part (source part)
58 Detection part for cylindrical part (detection part)
59 Ceiling detector (detector)
61 Compressor 62 Combustor 63 Turbine 64 Rotary shaft 65 Compressed air supply line 66 Fuel gas supply line 67 Combustion gas supply line 68 Booster 69 Turbine 70 Exhaust gas line 71 Steam supply line 72 Steam recovery line 73 Condenser 74 Gas purification equipment 75 Chimney 80 Control unit 82 Pressurized gas supply unit 83 Fluidized gas supply unit 101 Gasification furnace 102 Syngas cooler 110 Pressure vessel 111 Gasification furnace wall 115 Annulus unit 116 Combustor unit 117 Diffuser unit 118 Reductor unit 121 Gas outlet 122 Slag hopper 126 Burner 127 Burner 131 Evaporator 132 Superheater 134 Energy saving device 154 Internal space 156 External space CH Char H1 Char storage height H1 'Minimum char storage height

Claims (16)

A radiation source unit for irradiating gamma rays into a container in which powdered fuel is stored,
A ceiling detection unit that is provided on the ceiling of the container and detects γ-rays emitted from the radiation source unit,
A control unit that calculates a physical quantity of the powder fuel by obtaining a measurement value obtained by the ceiling detection unit,
A powder measuring device comprising: A powder measuring device according to claim 1,
The container provided with the powder measuring device,
The radiation source unit provided in an area filled with the powdered fuel in the container,
A detection unit that is provided in an area filled with the powdered fuel in the container and detects γ-rays emitted from the radiation source unit,
With
The control unit is a powder supply hopper that corrects a measurement value obtained by the ceiling detection unit using a measurement value obtained by the detection unit. A cone portion provided on the vertically lower side of the container, and having a shape reduced in diameter toward the vertically lower side,
A powder outlet provided at a lower end of the cone portion and supplying the powdered fuel to the outside of the container;
With
The source unit includes a cone unit source unit provided in the cone unit,
The detection unit includes a cone unit detection unit that detects γ-rays emitted from the cone unit source unit,
3. The powder supply hopper according to claim 2, wherein the control unit corrects a measurement value obtained by another detection unit using a measurement value obtained by the cone unit detection unit. 4. A powder inlet for receiving the powder fuel into the container;
An outlet valve that performs outflow and stop of the powder fuel passing through the powder outlet portion,
The controller is configured such that the outlet valve is in a closed state and the cone portion is formed from the start of receiving the powdered fuel from the powder inlet portion into the container until the outlet valve is opened. The powder supply hopper according to claim 3, wherein the measurement values obtained by the other detection units are corrected using the measurement values obtained by the application detection unit.   The control unit uses a measurement value obtained by the cone unit detection unit after the reception of the powder fuel into the container from the powder inlet portion that receives the powder fuel into the container is completed. 4. The powder supply hopper according to claim 3, wherein the measurement value obtained by the other detection unit is corrected. A pressurized gas supply unit that supplies gas into the container and pressurizes the container,
The control unit corrects the measurement values of the other detection units using measurement values obtained by the cone unit detection unit obtained before the gas is supplied from the pressurized gas supply unit. The powder supply hopper according to claim 4 or 5, wherein   The powder supply hopper according to any one of claims 2 to 6, wherein the control unit performs calculation using a plurality of measurement values measured a plurality of times at predetermined time intervals. A plurality of the containers provided with the powder measuring device are provided,
The powder supply hopper according to any one of claims 2 to 7, wherein the control unit calculates using a measurement value of the detection unit for each of the plurality of containers.   The powder supply hopper according to any one of claims 2 to 8, wherein the control unit outputs an alarm when a difference between the physical quantity of the powder fuel and the stored physical quantity in the past is equal to or greater than a predetermined value. .   The powder supply hopper according to any one of claims 2 to 9, wherein the control unit outputs an alarm when the physical quantity of the powdered fuel and / or a change rate of the physical quantity is out of a predetermined range.   The powder supply hopper according to any one of claims 2 to 10, wherein the measured value obtained by the detection unit is corrected, and the char mass is displayed on a GUI. A powder supply hopper according to any one of claims 2 to 11,
A gasifier for gasifying the powder fuel guided from the powder supply hopper,
Gasifier facilities equipped with. Gasification furnace equipment according to claim 12,
A gas turbine that is rotationally driven by burning at least a part of the generated gas generated by the gasification furnace equipment,
A steam turbine rotationally driven by steam generated by an exhaust heat recovery boiler for introducing turbine exhaust gas discharged from the gas turbine,
A generator rotatably connected to the gas turbine and / or the steam turbine;
Gasification combined cycle power plant equipped with. Irradiate gamma rays inside the container where the powdered fuel is stored,
Detecting the irradiated γ-rays at the ceiling of the container,
A powder measurement method for calculating a physical quantity of the powder fuel by obtaining a detected measurement value. Irradiate gamma rays inside the container where the powdered fuel is stored,
A powder measurement method for calculating a physical quantity of the powder fuel by obtaining a measurement value of detecting the irradiated γ-ray,
An outlet valve for performing the outflow and stop of the powder fuel is closed, and the outlet valve starts from the start of receiving the powder fuel into the container from the powder inlet port for receiving the powder fuel into the container. A powder measuring method for performing an arithmetic operation using the measured values obtained before the device is opened.   16. The powder measuring method according to claim 15, wherein the calculation is performed using a plurality of measurement values measured a plurality of times after a predetermined time.

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