JP2006098030A - Fuel distributor and distributing method for solid fuel combustion facility - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a solid fuel distributor and its distributing method for adjusting the distributed quantity of solid fuel of a solid fuel combustion facility and controlling the deviation of the distributed quantity in a coal burning boiler plant or the like. <P>SOLUTION: The fuel distributor for a solid fuel crushing device in the solid fuel combustion facility, and its distribution method, are provided with a distributed quantity adjusting device 20 capable of adjusting the distributed quantity of solid fuel independently at every connection part of a distributing part 6 for distributing solid fuel to each fuel piping 7, and each fuel piping 7. According to measured values such as the mass flow of solid fuel in each fuel piping 7, and/or the flame temperature of a solid fuel burner 8, the distributed quantity of solid fuel distributed to each fuel piping 7 can be adjusted and controlled to control the deviation of the distributed quantity. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

    In the present invention, in a coal fired boiler plant or the like, after solid fuel such as coal is pulverized by a pulverizer, the solid fuel is supplied from the pulverizer to a plurality of burners when used in facilities for supplying and burning to a plurality of burners. The present invention relates to a fuel distribution device that distributes and conveys and a distribution method thereof.

  In a coal-fired boiler plant for thermal power generation that burns pulverized coal obtained by pulverizing coal using a pulverizer installed on the premises of a coal-fired boiler plant as fuel, the pulverized powder is pulverized by a pulverizer. The charcoal is mixed with the carrier air to become a mixed fluid, distributed to a plurality of fuel pipes by a distribution unit provided on the outlet side of the mixed fluid of the pulverizer, and then conveyed to each burner for combustion.

  FIG. 12 shows a conventional fuel distribution apparatus for a solid fuel combustion facility. In this example, a vertical crusher is used as a coal crusher. In FIG. 12, coal 50 introduced from the outside into the vertical pulverizer through the coal supply pipe 1 is pulverized in the pulverization unit by biting between the pulverization table 2 and the pulverization roller 3 or a pulverization ball (not shown). The coal pulverizer is supplied with high temperature air from the high temperature air supply port 51 provided in the bottom of the pulverizer side wall from the outside, and is ejected from the throat 4 to the pulverization unit. Then, the coal 50 is blown up in the direction of the arrow 52 by the high-temperature air, and is conveyed to the classification device 5 in the upper part of the pulverizer.

  The coal particle group that has reached the classifying device 5 is swirled by the classifying device 5 so as to rotate around the inside of the pulverizer, and passes through the classifying device 5 in the direction of arrow 53 depending on the relationship between the centrifugal force and the fluid drag received from the gas flow. The pulverized coal is separated into the pulverized coal that falls in the direction of the arrow 54 that falls to the pulverization section and is pulverized again. The pulverized coal that has passed through the classification device 5 is sent to the fuel distribution unit 6, moves in the circumferential direction in the fuel distribution unit 6 while maintaining the turning by the classification device 5, and reaches the uppermost part of the distribution unit 6 when a plurality of pulverized coals are reached. Are distributed into the fuel pipe 7. The pulverized coal is conveyed to the pulverized coal burner 8 provided facing the boiler furnace 9 and burned in the furnace 9.

  Usually, the furnace 9 of one boiler plant is provided with one burner stage composed of a plurality of burners 8 in the width direction of the furnace wall constituting the furnace 9, and a plurality of burner stages in the height direction of the furnace 9. A stage burner stage is provided. Accordingly, when a plurality of pulverizers are provided and each pulverizer is provided so as to supply fuel to each burner stage of the furnace 9, 4 to 10 pieces constituting one burner stage of the furnace 9 are included in each pulverizer. The fuel distributor 6 for distributing and supplying coal to the burner and the fuel pipes 7 of the fuel distributor 6 are required.

  At this time, if there is a deviation in the amount of coal supplied to each burner 8, a temperature deviation (for example, about 50 ° C.) of the burner flame in the width direction of the furnace occurs for one burner stage, and the furnace heat recovery of the boiler Characteristics are degraded. In addition, since each burner 8 in the same burner stage is not usually provided with an individual adjustment mechanism of the burner air ratio, the combustion state of each burner 8 varies depending on the coal concentration of each burner 8 in one burner stage. Non-uniformity occurs, and nitrogen oxides (hereinafter referred to as NOx) and unburned components increase. Therefore, the distribution unit 6 needs to equalize the distribution amount of coal distributed to the fuel pipes 7 connected to each burner 8.

  Further, as a conventional low NOx combustion technique, a burner combustion zone is provided at the lower portion of the boiler furnace 9 in the height direction, and reduction combustion is performed at a low air ratio, and the boiler furnace height direction upper portion, that is, at the downstream side of the burner combustion zone. A two-stage combustion method is provided in which an over-air port (also referred to as an after-air port) is provided to burn unburned components generated by reduction combustion. However, since reductive combustion of fuel is performed in the burner portion, in the boiler furnace 9, sulfidation corrosion of the furnace wall becomes a problem, and it may be necessary to eliminate it.

  In this way, in the pulverized coal fired boiler plant, the solid pulverizer equipped with the pulverizing roller 3 is called a vertical roller mill. The amount of coal distributed from the vertical roller mill to each pulverized coal burner 8 is the NOx generation of the boiler furnace 9. It is well known that it greatly affects the quantity and unburned properties. The flow rate of the fuel flowing through each pipe 7 due to the difference in flow resistance in the pipe caused by the difference in the flow path length to each burner 8 of each fuel pipe 7 in the solid fuel combustion facility and the bending of the pipe in the flow path, etc. That is, a deviation occurs in the distribution amount.

  In the prior art, a gas flow rate adjusting valve 11 is provided in the middle of each fuel pipe 7 as shown in the fuel distribution control mechanism diagram of the fuel distribution device of the solid fuel combustion facility in FIG. A structure and a method for adjusting the flow rate of the mixed fluid flowing through each fuel pipe 7 to be the same have been proposed. However, although the fluid flow rate can be adjusted by the above measures, the specific gravity of coal is more than 1000 times that of the transport gas, and the coal particles behave differently from the flow of the transport gas, so the flow rate is changed in the middle of each fuel pipe. Even if it is adjusted, the distribution amount of each coal at each burner outlet cannot be made equal.

  FIG. 13 is a plan view of a pulverizing apparatus provided with a fuel distribution section 6 according to the prior art or the present invention at the top, and is a view of the fuel distribution section 6 as viewed from above. The fuel distribution section 6 and the fuel pipes 7a to 7 7h shows an arrangement example. Although this figure shows the case where there are eight fuel pipes 7, the distribution function is the same for other numbers, and is not limited to the number. Since the fuel distributor 6 constitutes the uppermost part of the pulverizer, the mixed fluid outlet portion on the upper surface of the fuel distributor 6 is connected to the pulverizer in the pulverizer from the outside in addition to the fuel pipes 7a to 7h. An access door 13 for entering the distribution unit 6 during maintenance such as during periodic inspection is disposed.

  For this reason, normally, as shown in FIG. 13, there is a restriction that the fuel pipes 7a to 7h cannot be arranged at equal intervals in the circumferential direction. In particular, in such an unequal interval arrangement, a pipe 7 having a wide gap between the other fuel pipes 7 (in the illustrated example, 7a, 7e, 7f, and 7h) and a pipe 7 having a narrow gap between the other fuel pipes 7 are provided. (In the example shown, they are 7b, 7c, 7d, and 7g).

  At the top of the vertical crusher of the type in which the distribution of the pulverized solid fuel shown in FIG. 12 and FIG. 13 is performed by the rising carrier gas flow, the pulverized coal and the carrier gas are separated from the lower classifier 5 (FIG. 12). Since the mixed fluid rises while rotating in the circumferential direction, each of the pipes 7 a, 7 e, 7 f, 7 h and the narrow pipes 7 b, 7 c, 7 d, 7 g that are spaced apart from the other fuel pipes 7 There is a tendency for deviations in the amount of coal distributed in

  In addition, as another cause of a large deviation of the coal distribution amount distributed in each of the pipes 7a to 7h, a mixed fluid of pulverized coal that has reached the distribution unit 6 from the classifier 5 of the vertical pulverizer and the conveying gas, That is, it is mentioned that the coal concentration of the solid-gas two-phase flow is not uniformly dispersed with respect to the inlet cross-sectional direction of the distributor 6. This is due to the fact that the non-uniformity of the coal concentration generated in the pulverizing section is not sufficiently eliminated by the classifier 5. In the pulverizing section, as shown in FIG. 12, a plurality of pulverizing rollers 3 are arranged opposite to the pulverizing table 2, for example, three in the rotational direction facing the horizontal direction, so that the pulverization is intermittently performed. Although it is performed, since the high-temperature air that is the carrier gas is continuously supplied, the coal concentration in the mixed fluid varies.

  Further, a difference in coal concentration also occurs due to fluctuations in the circumferential direction of the amount of conveying air due to the positional relationship between the high-temperature air supply port 51 and the throat 4. Furthermore, since the concentration of the solid-gas two-phase flow that has passed through the classifier 5 is very low (volume ratio of 0.005% or less), the so-called roping phenomenon in which the air is agglomerated and linearized while being conveyed. (Phenomenon connected to a rope) occurs, which is one of the causes of the difference in coal concentration. Thus, the coal concentration deviation is likely to occur in the inlet cross-sectional direction of the distribution unit 6, and if the same operation state is continued, the coal is easily distributed to the specific fuel pipe 7, and thus the distribution amount needs to be adjusted. .

  In addition, as shown in FIG. 12, the prior art has a vertical roller mill in which a constriction 10 is provided at the inlet of the distribution unit 6 to reduce the concentration deviation of the coal, and an enlargement unit is provided on the downstream side of the constriction unit 10. As a structure having the above, a contrivance is made to alleviate the coal concentration deviation in the distribution unit 6. However, in this case as well, a pressure loss occurs in the throttle 10, but the pressure loss cannot be increased in the throttle 10 in order to transport the mixed fluid from the fuel pipe 7 on the downstream side to the solid fuel burner 8. The opening of the throttle portion 10 cannot be made small enough to make the mixed fluid flow rate to each fuel pipe 7 sufficiently uniform. Therefore, even if the above measures are taken, conventionally, coal is not evenly distributed to each fuel pipe 7, and depending on the operating conditions of the vertical crusher, the deviation of the coal concentration is about 5 to 10%. May occur. Further, these methods did not include the concept of controlling the distribution amount deviation in each fuel pipe 7.

  In order to eliminate such problems, Patent Document 1 proposes a structure in which the lower ends of all the fuel pipes are protruded from the inner surface of the fuel distribution part by a certain dimension at the connection part between the fuel distribution part and the fuel pipe. The purpose of this is to equalize the concentration distribution of coal in each fuel pipe by colliding the pulverized coal swirling inside the fuel distribution section with the protruding part of each fuel pipe and eliminating the swirlability. is there.

Further, in Patent Document 2, a guide plate is provided on the downstream side with respect to the air swirling direction in the distribution section so as to block the air flow at the connection section of the fuel pipe, thereby introducing particles swirling in the distribution section into the fuel pipe. A structure that facilitates this has been proposed.
JP-A-10-57828 Japanese Patent Laid-Open No. 10-76171

  As described above, the mixed fluid swirling inside the fuel distributor 6 which is the fuel distributor of the solid fuel combustion facility shown in FIG. 12 inherits the non-uniformity of the coal concentration generated in the pulverizer. For this reason, even if the pulverized coal collides with the protruding portions of the individual fuel pipes 7 and locally loses the swirlability as in the invention described in Patent Document 1, the coal concentration remains uneven. In this state, the fuel pipes 7 are distributed. Even if there is no coal concentration deviation in the fluid mixture from the pulverization section, the fuel pipes 7 as shown in FIG. 13 are arranged at irregular intervals in the circumferential direction of the ceiling of the distribution section 6. In the invention described in Patent Document 1, it is difficult to eliminate the coal distribution amount deviation.

Also, the invention described in Patent Document 2 is not effective for the non-uniformity of coal concentration generated in the pulverization section, similar to the invention described in Patent Document 1, and the fuel pipe 7 Uneven distribution of coal concentration due to unequal spacing cannot be dealt with at all, and conversely, the distribution amount of fuel supplied into the piping 7 that is widely spaced from other fuel piping 7 and relatively easy to distribute coal is further increased. There is a possibility of increasing.
Further, in a coal fired boiler plant, particularly when the load is high or low (especially the minimum load), the deviation of the fuel supply amount is controlled, and efficient operation is required.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a fuel distribution device for a solid fuel combustion facility and a method for distributing the solid fuel that can adjust the distribution amount of the solid fuel distributed to each solid fuel burner of the furnace and eliminate the deviation of the distribution amount. It is.

Also, the object of the present invention is to make it possible to make the distribution amount of solid fuel to each fuel pipe of the furnace more uniform than in the past, and to distribute the fuel of the solid fuel combustion facility that saves energy and reduces the cost of the entire facility. It is to provide a device and its distribution method.
Further, another problem of the present invention is that, in the plurality of burners constituting the burner stage of the furnace, when different combustion states are required in each burner, for example, the coal concentration in the burner on the end side in the furnace width direction It is intended to provide a fuel distribution device for a solid fuel combustion facility and its distribution method that can adjust the deviation of the fuel distribution amount to each fuel pipe connected to each burner, for example, by reducing the reduction combustion.

The object of the present invention can be achieved by adjusting the distribution amount of the solid fuel distributed to each solid fuel burner of the solid fuel combustion facility and controlling the distribution amount deviation and the method thereof. Specifically, this can be achieved by employing the following method.
That is, the invention according to claim 1 is for supplying a plurality of solid fuel combustion burners after a pulverizing unit for pulverizing solid fuel and a solid fuel pulverized by the pulverizing unit entrained with a carrier gas to form a mixed fluid In a fuel distribution apparatus for a solid fuel combustion facility having a distribution unit that distributes to each of the fuel pipes, distribution in which the distribution amount of the solid fuel can be adjusted independently for each of the distribution unit and each connection part of the fuel pipes It is a fuel distribution device of a solid fuel combustion facility provided with a quantity adjusting means.

The invention according to claim 2 is the solid fuel combustion according to claim 1, wherein the distribution amount adjusting means has resistance means for receiving resistance when the solid fuel introduced from the distribution portion into the fuel pipe is introduced. It is a fuel distribution device for equipment.
The invention according to claim 3 is the fuel distribution device of the solid fuel combustion facility according to claim 1 or 2, wherein the distribution unit is provided with a classification unit for classifying the mixed fluid introduced from the pulverization unit. is there.

According to a fourth aspect of the present invention, the distribution amount adjusting means has a cylindrical member that can move to the connection portion between the fuel distribution portion and each fuel pipe, and the position of the cylindrical member can be adjusted. 4. A fuel distribution device for a solid fuel combustion facility according to any one of items 1 to 3.
According to a fifth aspect of the present invention, the distribution amount adjusting means has a movable plate member at a connection portion between the fuel distribution portion and each fuel pipe, and the position of the plate member can be adjusted. A fuel distribution device for a solid fuel combustion facility according to any one of the above.
According to a sixth aspect of the invention, the distribution amount adjusting means has an air injection port at a connection portion between the fuel distribution unit and each fuel pipe, and the fuel distribution unit or the inside of the fuel pipe is connected to the air injection port. The fuel distribution device for a solid fuel combustion facility according to any one of claims 1 to 3, wherein an air jet is introduced into the fuel.

  The invention according to claim 7 is a flow rate measuring device for detecting a mass flow rate of the solid fuel in the fuel pipe and / or one or a plurality of flame temperature measuring devices for detecting a flame temperature of each solid fuel burner, 7. The control device according to claim 1, further comprising: a control device that controls a distribution amount of the solid fuel by each of the distribution amount adjusting means according to a measurement value by the flow rate measurement device and / or the flame temperature measurement device. It is a fuel distribution apparatus of the solid fuel combustion facility.

  The invention according to claim 8 is the fuel distribution method using the fuel distribution device of the solid fuel combustion facility according to any one of claims 1 to 7, wherein each of the fuel distribution methods corresponds to the mass flow rate of the solid fuel in each fuel pipe. A fuel distribution method for a fuel distribution device of a solid fuel combustion facility, wherein the distribution amount of solid fuel supplied to each solid fuel burner is controlled by the distribution amount adjusting means.

  According to a ninth aspect of the present invention, there is provided a fuel distribution method using the fuel distribution device of the solid fuel combustion facility according to any one of the first to seventh aspects, wherein each distribution according to a flame temperature of each solid fuel burner. This is a fuel distribution method for a fuel distribution device of a solid fuel combustion facility, in which the distribution amount of the solid fuel supplied to each solid fuel burner is controlled by the amount adjusting means.

  A tenth aspect of the present invention is the fuel distribution method using the fuel distribution device of the solid fuel combustion facility according to any one of the first to seventh aspects, wherein the measured value of the mass flow rate of the solid fuel in each fuel pipe and A fuel distribution method for a fuel distribution device of a solid fuel combustion facility that controls a distribution amount of solid fuel supplied to each solid fuel burner by each distribution amount adjusting means according to a measured value of a flame temperature of each solid fuel burner. is there.

  An eleventh aspect of the present invention is the fuel distribution method using the fuel distribution device for the solid fuel combustion facility according to any one of the first to seventh aspects, wherein a plurality of solids at the same height of the furnace of the solid fuel combustion facility are provided. Solid fuel combustion equipment for controlling the distribution amount of solid fuel by the respective distribution amount adjusting means so that the fuel distribution amount distributed to each burner of the burner stage composed of fuel burners is uniform or substantially uniform in the same burner stage This is a fuel distribution method of the fuel distribution apparatus of FIG.

  A twelfth aspect of the present invention is the fuel distribution method using the fuel distribution device for the solid fuel combustion facility according to any one of the first to seventh aspects, wherein a plurality of solids at the same height of the furnace of the solid fuel combustion facility are provided. A solid fuel combustion facility for controlling the distribution amount of solid fuel by each distribution amount adjusting means so that the fuel distribution amount distributed to each burner of the burner stage composed of fuel burners is individually adjusted in the same burner stage. A fuel distribution method for a fuel distribution device.

(Function)
The present invention has distribution amount adjusting means capable of adjusting the distribution amount of the solid fuel to each fuel pipe independently for each connection portion between the fuel distribution section and each fuel pipe. The gas flow rate of each fuel pipe can be controlled by a flow control valve provided in the middle of the pipe, but the distribution amount of the solid fuel affects the structure of the branch part to each fuel pipe, that is, the connection part of the fuel distribution part and each fuel pipe. Receive.

According to the first aspect of the invention, in the solid fuel combustion facility, the distribution amount of the solid fuel can be adjusted by the distribution amount adjusting means provided independently for each connection portion of the fuel distribution portion and each fuel pipe, An appropriate amount of solid fuel can be supplied to each solid fuel burner.
According to the invention described in claim 2, in addition to the operation of the invention described in claim 1, since the distribution amount adjusting means has the resistance means for receiving resistance when the solid fuel is introduced into the fuel pipe, the fuel distribution is achieved. The flow rate of the solid fuel can be adjusted by the resistance means for each connecting portion between the fuel pipe and each fuel pipe, and an appropriate amount of solid fuel can be supplied to each solid fuel burner.
According to the invention described in claim 3, in addition to the operation of the invention described in claim 1 or 2, the mixed fluid introduced from the pulverization unit is made to be in accordance with the size of the solid fuel by the classification unit provided in the fuel distribution unit. After classification, a relatively fine solid fuel can be introduced into the solid fuel burner.

Further, as a specific configuration of the distribution amount adjusting means, the present invention employs a configuration that exhibits the following effects, for example, by changing the structure of the connecting portion.
According to invention of Claim 4, in addition to the effect | action of invention of Claim 1 thru | or 3, by adjusting the position of the movable cylindrical member provided in the connection part of a fuel distribution part and each fuel piping, The solid fuel amount introduced into each fuel pipe is partially blocked, and the distribution amount of the solid fuel to each fuel pipe can be adjusted.

  According to the fifth aspect of the present invention, in addition to the effects of the first to third aspects of the invention, by adjusting the position of the movable plate member provided at the connecting portion between the fuel distributor and each fuel pipe, The solid fuel amount introduced into the fuel pipe is partially blocked, and the distribution amount of the solid fuel to each fuel pipe is adjustable.

  Further, according to the sixth aspect of the invention, in addition to the operation of the first to third aspects of the invention, from the air injection port provided at the connection portion between the fuel distribution portion and each fuel pipe, the fuel distribution portion or each fuel is provided. Distributing the amount of solid fuel to each fuel pipe by partially blocking the amount of solid fuel introduced into each fuel pipe by introducing an air jet into the pipe and increasing or decreasing the flow rate of the air jet The configuration is adjustable.

  Further, according to the invention described in claim 7, in addition to the operation of the invention described in claims 1 to 6, the control device is provided to each fuel pipe according to the measured value by the flow rate measuring device and / or the flame temperature measuring device. The solid fuel distribution amount is automatically controlled by the solid fuel distribution amount adjusting means.

According to the eighth aspect of the present invention, the distribution amount of the solid fuel is reduced in the fuel pipe having a high fuel flow rate and the fuel pipe having a low fuel flow rate is set according to the mass flow rate of the solid fuel in each fuel pipe. Controls the distribution amount of the solid fuel to each fuel pipe by each distribution amount adjusting means so as to increase the distribution amount of the solid fuel.
According to the ninth aspect of the invention, by applying the fact that there is a correlation between the flow rate of the solid fuel flowing through the burner and the flame temperature of the burner, each solid fuel is adjusted by the distribution amount adjusting means according to the flame temperature of each solid fuel burner. Controls the amount of solid fuel distributed to the fuel burner.
According to the invention described in claim 10, the distribution amount of the solid fuel to each solid fuel burner is controlled by the distribution amount adjusting means according to the measured value of the mass flow rate of the solid fuel and the flame temperature of the solid fuel burner. .

  Furthermore, according to the inventions of claims 11 and 12, the combustion state in the burner width direction is adjusted by adjusting the fuel distribution amount distributed to each of the plurality of burners constituting the burner stage.

  According to the eleventh aspect of the invention, the fuel distribution amount distributed to each burner is made uniform or substantially uniform in the same burner stage, thereby achieving a stable combustion state. For example, if a burner step is provided on the front wall of the furnace and / or the rear wall facing the front wall, the reducing atmosphere is reduced by reducing the distribution amount to the burners on both side walls where the burner step is not provided. It is possible to shift from lower combustion to combustion in an oxidizing atmosphere, and it is possible to prevent harmful effects caused by sulfidation corrosion of the furnace water wall that may occur due to reduction combustion.

  According to the twelfth aspect of the present invention, for example, the distribution amount adjusting means controls the fuel supply amount intentionally supplied to each solid fuel burner to have a deviation so that the periodic temperature distribution is generated in the furnace. By forming, gas mixing in the furnace can be promoted by convection generated by the temperature difference (density difference) of the gas.

  According to the first aspect of the present invention, in the solid fuel combustion facility, the distribution amount of the solid fuel distributed to each solid fuel burner can be adjusted, and the deviation of the distribution amount can be controlled. Therefore, an appropriate amount of solid fuel can be supplied to each solid fuel burner. Moreover, energy saving and cost reduction of the entire equipment can be achieved. Furthermore, the deviation of the fuel supply amount at the time of high load or low load (particularly the minimum load) can be controlled in the coal fired boiler plant, and efficient operation becomes possible.

  According to the invention described in claim 2, in addition to the effect of the invention described in claim 1, the distribution amount of the solid fuel distributed to each solid fuel burner can be easily adjusted by the resistance means included in the distribution amount adjustment means. The deviation of the distribution amount can be controlled.

  According to the invention described in claim 3, in addition to the effect of the invention described in claim 1 or 2, the mixed fluid introduced from the pulverizing part by the classifying part is classified by the size of the solid fuel, and then relatively fine. Since the solid fuel can be introduced into the solid fuel burner, a difference in the solid fuel concentration between the solid fuel burners hardly occurs, and the combustibility of each solid fuel burner does not occur.

  According to the invention described in claim 4, in addition to the effects of the inventions described in claims 1 to 3, the cylindrical member capable of moving the connecting portion between the fuel distribution portion and the fuel pipe is moved and adjusted, so that each solid fuel burner is adjusted. The distribution amount of the solid fuel to be distributed can be adjusted more easily, and the deviation of the distribution amount distributed to each solid fuel burner can be controlled.

  According to the fifth aspect of the invention, in addition to the effects of the first to third aspects, the plate material provided at the connecting portion between the fuel distribution portion and the fuel pipe is moved and adjusted inside the fuel distribution portion or the fuel pipe. The distribution amount of the solid fuel distributed to each solid fuel burner can be adjusted, and the deviation of the distribution amount distributed to each solid fuel burner can be controlled. Further, by using a simple moving mechanism, manufacturing is easy and manufacturing can be performed at low cost.

  According to the invention described in claim 6, in addition to the effects of the invention described in claims 1 to 3, by introducing an air jet into the fuel distributor or the fuel pipe, and by increasing or decreasing the flow rate of the air jet, The distribution amount of the solid fuel distributed to each solid fuel burner can be easily adjusted, and the deviation of the distribution amount distributed to each solid fuel burner can be controlled. Moreover, since it is a simple mechanism, manufacture is easy and it can manufacture at low cost.

  According to the seventh aspect of the invention, in addition to the effects of the first to sixth aspects, the solid fuel mass flow rate measuring device and the flame temperature measuring device of each solid fuel burner are distributed according to each measured value. The distribution amount distributed to each solid fuel burner can be automatically finely adjusted and controlled by the control device for controlling the distribution amount of the solid fuel distributed to each solid fuel burner by the amount adjusting means.

  According to the eighth aspect of the present invention, it is possible to adjust and control the distribution amount such as decreasing or increasing the distribution amount of the solid fuel according to the mass flow rate of the solid fuel in each fuel pipe. The distribution amount of the solid fuel distributed to each solid fuel burner can be kept uniform, and the deviation of the distribution amount of the solid fuel distributed to each solid fuel burner can be controlled. Therefore, an appropriate amount of solid fuel can be supplied to each solid fuel burner. Moreover, energy saving and cost reduction of the entire equipment can be achieved. Furthermore, the deviation of the fuel supply amount at the time of high load or low load (particularly the minimum load) can be controlled in the coal fired boiler plant, and efficient operation becomes possible.

  According to the invention described in claim 9, by controlling the flame temperature of each solid fuel burner to be always constant, the distribution amount of the solid fuel distributed to each solid fuel burner can be kept uniform, The deviation of the distribution amount of the solid fuel distributed to the solid fuel burner can be controlled. Therefore, an appropriate amount of solid fuel can be supplied to each solid fuel burner. Moreover, energy saving and cost reduction of the entire equipment can be achieved. Furthermore, the deviation of the fuel supply amount at the time of high load or low load (particularly the minimum load) can be controlled in the coal fired boiler plant, and efficient operation becomes possible.

  According to the invention described in claim 10, by simultaneously measuring the mass flow rate of the solid fuel and the flame temperature of each solid fuel burner, the reliability of the measured value is improved, and the result of the measured value is obtained by the distribution amount adjusting means. More reliable and appropriate control reflected in the control becomes possible, and the deviation of the distribution amount of the solid fuel distributed to each solid fuel burner can be controlled. Therefore, an appropriate amount of solid fuel can be supplied to each solid fuel burner. Moreover, energy saving and cost reduction of the entire equipment can be achieved. Furthermore, the deviation of the fuel supply amount at the time of high load or low load (particularly the minimum load) can be controlled in the coal fired boiler plant, and efficient operation becomes possible.

  According to the eleventh aspect of the present invention, the amount of solid fuel supplied to each solid fuel burner becomes uniform, and the deviation of the flame temperature in each solid fuel burner is eliminated, so that the temperature in the fuel furnace is made uniform and stable. The combustion state that has been achieved becomes possible. In addition, the amount of distribution to each solid fuel burner can be adjusted, for example, to shift from combustion in a reducing atmosphere to combustion in an oxidizing atmosphere, and prevent harmful effects caused by sulfidation corrosion on the furnace water wall that can occur in reducing combustion Can do. Therefore, it is possible to realize a fuel distribution section that can make the distribution amount of the solid fuel to each fuel pipe more uniform than in the past, and a solid fuel combustion facility equipped with the fuel distribution section. Also useful. Moreover, when using the said solid fuel combustion equipment as a boiler, a favorable heat-transfer characteristic is acquired. Further, it becomes possible to suppress the unburned matter in the ash and air pollutants such as NOx, which has been generated due to a decrease in furnace heat collecting characteristics such as boilers and non-uniform combustion state.

  According to the twelfth aspect of the invention, the distribution amount adjusting means controls the fuel supply amount intentionally supplied to each solid fuel burner to have a deviation, thereby forming a periodic temperature distribution in the furnace. Thus, gas mixing in the furnace can be promoted by convection generated by temperature difference or density difference of the gas. In this way, it becomes possible to suppress atmospheric pollutants such as NOx and unburned components in ash, which are generated due to a decrease in furnace heat collection characteristics such as boilers and non-uniform combustion state.

Embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a configuration diagram of a fuel distribution device of a solid fuel combustion facility according to the present embodiment. The fuel distribution device of the solid fuel combustion facility shown in FIG. 1 has substantially the same configuration except for the fuel distribution device of the conventional solid fuel combustion facility described in FIG. That is, the coal 50 introduced into the vertical crusher, which is a coal pulverizer, from the outside through the coal supply pipe 1 enters the pulverization unit, in which the pulverization table 2 and the pulverization roller 3 or a pulverization ball (not shown) It is crushed by biting. High-temperature air is supplied from the supply port 51 at the bottom of the pulverizer side wall, and is ejected through the throat 4 to the pulverization unit. Then, the coal 50 is blown up in the direction of the arrow 52 by the high-temperature air, and is conveyed to the classification device 5 in the upper part of the pulverizer.

  The coal particle group that has reached the classifier 5 is swung around the crusher by the classifier 5 and passes through the classifier 5 in the direction of arrow 53 depending on the relationship between the centrifugal force and the fluid drag received from the gas flow. The pulverized coal is separated into the pulverized coal that falls in the direction of the arrow 54 that falls to the pulverization section and is pulverized again. The pulverized coal that has passed through the classification device 5 is sent to the fuel distribution unit 6, moves in the circumferential direction in the fuel distribution unit 6 while maintaining the turning by the classification device 5, and reaches the uppermost part of the distribution unit 6 when a plurality of pulverized coals are reached. Are distributed into the fuel pipe 7. The pulverized coal is conveyed to the pulverized coal burner 8 provided facing the boiler furnace 9 and burned in the furnace 9.

  The main feature of this embodiment is that a distribution amount adjusting device 20, which is a solid fuel distribution amount adjusting means, is installed at the connecting portion between the fuel distribution portion 6 and the fuel pipe 7. In FIG. 1, in order to avoid complication, only two solid fuel distribution amount adjusting devices 20 provided at each connection portion between the plurality of fuel pipes 7 and the fuel distribution portion 6 are shown. As for the transport flow path of the mixed fluid of the pulverized coal and the transport fluid from the fuel pipe 7 to the solid fuel burner 8, one place is typically described. The amount of coal distributed to each fuel pipe is adjusted by the solid fuel distribution amount adjusting device 20 by changing the structure of the connecting portion between the fuel distribution section 6 and each fuel pipe 7 which is the controlling factor of the solid fuel distribution quantity. can do.

  FIG. 2 is a perspective view showing an embodiment of a specific configuration of the solid fuel distribution amount adjusting device 20. In this embodiment, a cylindrical member 21 provided in the fuel pipe 7 so as to be movable up and down is disposed, and connected to a moving device 22 that moves the cylindrical member 21 in the vertical direction. Thereby, the cylindrical member 21 can move up and down in the fuel pipe 7, and the protrusion height H from the inner wall of the fuel distributor 6 can be adjusted.

  The function of the solid fuel distribution amount adjusting device shown in FIG. 2 will be specifically described with reference to FIGS. FIG. 3A shows a vertical cross section of the solid fuel distribution adjustment device 20 passing through the central axis of the fuel pipe 7, and FIG. 3A projects the cylindrical member 21 to the inner wall of the fuel distribution unit 6. If not. In this case, since the solid fuel (coal) 50 moving while turning inside the distribution unit 6 does not hit the side surface of the cylindrical member 21, it is introduced into the fuel pipe 7 without receiving any resistance. On the other hand, FIG. 3 (b) shows a vertical cross section of the solid fuel distribution adjustment device 20 passing through the central axis of the fuel pipe 7, and FIG. 3 (b) shows the cylindrical member 21 as the inner wall of the fuel distribution section 6. It is a case where it sticks out. In this case, after the solid fuel 50 collides with the side surface of the protruding portion of the cylindrical member 21, a part of the solid fuel moves up to the lower side (in the direction of arrow 41) and then rises and is introduced into the fuel pipe 7. However, the other solid fuel 50 moves around the outer circumference of the cylindrical member 21 (in the direction of the arrow 42) and is not introduced into the fuel pipe 7. As described above, by increasing the protruding height H protruding downward from the ceiling wall of the fuel distributor 6 of the cylindrical member 21, the amount of solid fuel distributed into the fuel pipe 7 can be reduced.

  Thus, in the first embodiment, the cylindrical member 21 provided inside each fuel pipe 7 is moved and adjusted in the vertical direction so that the distribution amount of the solid fuel distributed to each solid fuel burner can be adjusted. Can be controlled.

  4 is a perspective view showing another embodiment of the specific configuration of the distribution amount adjusting device 20, FIG. 5 is a plan view for explaining the arrangement relationship of the constituent members in FIG. 4, and FIG. FIG. In the present embodiment, a plate member 23 capable of adjusting the protruding height from the inner wall of the fuel distribution unit 6 is installed in the vicinity of the connection portion with the fuel pipe 7 on the upper surface of the fuel distribution unit 6. The plate member 23 may be installed in the fuel distributor 6 or the fuel pipe 7, or may be installed in the fuel distributor 6 and the fuel pipe 7.

  The plate member 23 is connected to the moving device 24. As shown in FIG. 5, the plate member 23 is preferably installed upstream of the fuel pipe 7 with respect to the swirling direction 43 of the solid fuel in the fuel distributor 6. 5 is a plan view for explaining the arrangement relationship between the fuel pipes 7a to 7d connected to the fuel distributor 6 and the plate member 23. FIG. In FIG. 5, for convenience of explanation, the number of fuel pipes is four, but other numbers may be used. A plurality of plate members 23 may be provided in the vicinity of the same fuel pipe 7. 6 is a longitudinal sectional view passing through the central axis of the fuel pipe 7 of the distribution amount adjusting device 20 shown in FIG.

  The function of the distribution amount adjusting device 20 shown in FIG. 4 will be described with reference to FIG. 6. When the plate member 23 protrudes from the inner wall of the fuel distribution unit 6, the solid fuel 50 moving while turning inside the distribution unit 6. After colliding with the protruding portion of the plate member 23, it temporarily moves downward of the plate member 23, but a part of the solid fuel 50 is guided by the fluid drag force of the gas flowing into the fuel pipe 7 as indicated by an arrow 41. Are introduced into the fuel pipe 7. The other solid fuel 50 is not introduced into the fuel pipe 7 as indicated by the arrow 42 and starts moving again in the distribution unit 6. By increasing the height H projecting downward from the ceiling wall of the distribution portion of the plate member 23, the amount of solid fuel that is not introduced into the fuel pipe 7 increases. Therefore, by adjusting the height of the plate member 23, the solid to each fuel pipe 7 is increased. It is possible to control the amount of fuel distribution. 4 and 6, the plate member 23 is moved and adjusted in the vertical direction, but the plate member 23 may be moved and adjusted in the left and right direction.

Thus, in the second embodiment, the plate material 23 provided inside each fuel pipe 7 is moved and adjusted in the vertical direction so that the distribution amount of the solid fuel distributed to each solid fuel burner 8 can be adjusted. Can be controlled.
The plate member 23 and its vertical movement mechanism in this embodiment are simpler than the cylindrical member 21 and its vertical movement mechanism in the first embodiment. Its manufacturing cost is also relatively low.

  FIG. 7 shows still another embodiment of the specific configuration of the distribution amount adjusting device 20. In this embodiment, an air injection port 25 is provided in the vicinity of the connection portion with the fuel pipe 7 on the upper surface of the fuel distribution section 6, and an air jet is introduced into the fuel distribution section 6 or into the fuel pipe 7. The air injection port 25 may be provided so that an air jet is introduced into the fuel pipe 7. The amount of air to be ejected can be adjusted by a flow rate adjustment valve 26 provided in a pipe that supplies air to the air injection port 25. The installation position of the air injection port 25 is preferably on the upstream side of the fuel pipe 7 with respect to the swirling direction of the solid fuel in the fuel distributor 6. There may be a plurality of air injection ports 25.

This function will be described with reference to FIG. FIG. 8 is a longitudinal sectional view passing through the central axis of the fuel pipe 7 of the distribution amount adjusting device 20 shown in FIG.
When the solid fuel 50 moving while turning inside the distribution unit 6 reaches below the air injection port 25, the solid fuel 50 is blown down by the air jet 27 from the air injection port 25. Among them, a part of the solid fuel 50 is guided by the fluid drag of the gas flowing into the fuel pipe 7 and introduced into the fuel pipe 7 in the direction of the arrow 41, while the other solid fuel 50 is introduced into the fuel pipe 7. Instead, it flows in the direction of the arrow 42 that moves again in the distributor 6.

  In the present embodiment, the solid fuel that is not introduced into the fuel pipe 7 increases by increasing the flow rate of the air jet from the air injection port 25. Therefore, since the distribution amount of the solid fuel to each fuel pipe 7 can be controlled by adjusting the air flow control valve 26, the solid to each fuel pipe 7 is compared with the case where various members are moved and adjusted. Easy control of fuel distribution.

  FIG. 9 is an overall configuration diagram including a fuel supply control mechanism of an embodiment of a solid fuel combustion facility equipped with the fuel distributor 20 according to the present invention. In this embodiment, the number of fuel pipes 7 is four (7a to 7d and fuel pipes 7b and 7c are not shown). In the present embodiment, distribution amount adjusting devices 20a to 20d (distribution amount adjusting devices 20b to 20c are not shown) are installed at the connecting portion between the fuel distribution unit 6 and the fuel pipes 7a to 7d), and the fuel pipes 7a to 7d. Are provided with solid fuel flow rate measuring devices 32a to 32d (flow rate measuring devices 32b to 32d are not shown). The measured values 33a to 33d of the flow rate measuring devices 32a to 32d are sent to the controller 30 of the distribution amount adjusting devices 20a to 20d. Then, control commands 31a to 31d of the respective distribution amount adjusting devices 20a to 20d are calculated so as to make the solid fuel flow rates in the respective fuel pipes 7a to 7d uniform, and are sent to the respective distribution amount adjusting devices 20a to 20d. .

  In the system shown in FIG. 9, when the solid fuel distribution amount of any fuel pipe 7 increases or decreases from the solid fuel distribution amount to other fuel pipes 7, the flow amount measuring devices 32 a to 32 d increase or decrease the solid fuel distribution amount. Is directly measured, and the controller 30 controls the distribution amount adjusting devices 20a to 20d so that the solid fuel flow rates of the fuel pipes 7a to 7d become uniform. Therefore, it is possible to always maintain a uniform distribution amount of the solid fuel to the fuel pipes 7a to 7d.

  FIG. 10 shows another embodiment of the solid fuel combustion facility equipped with the fuel distributor according to the present invention. In the present embodiment, distribution amount adjusting devices 20a to 20d (distribution amount adjusting devices 20b to 20d are not shown) at the connecting portions of the fuel distribution unit 6 and the fuel pipes 7a to 7d (fuel pipes 7b and 7c are not shown). ) And a flame temperature measuring device 34a (flame temperature measuring devices 34b to 34d are not shown) of the solid fuel burners 8a to 8d (burners 8b to 8d are not shown). .

The measured values 35a to 35d of the flame temperature measuring devices 34a to 34d are sent to the controller 30 of the distribution amount adjusting devices 20a to 20d.
Then, the control commands 31a to 31d of the distribution amount adjusting devices 20a to 20d are calculated so as to make the solid fuel flow rates of the fuel pipes 7a to 7d uniform, and are sent to the distribution amount adjusting devices 20a to 20d.

For example, if the flow rate of the solid fuel flowing from the fuel pipe 7a to the burner 8a increases, the amount of heat generated by the burner flame also increases, so that the flame temperature similarly increases. Further, when the flow rate of the solid fuel flowing into the burner 8a is reduced, the heat value of the flame is also reduced and the flame temperature is lowered. As described above, since there is a correlation between the flow rate of the solid fuel flowing into the burner 8a and the flame temperature of the burner 8a, it can be indirectly measured by the flame temperature without directly measuring the flow rate of the solid fuel.
Although various flame temperature measuring devices 34a to 34d are used, contact-type measuring instruments such as thermocouples are severely deteriorated by heat. Therefore, non-contact measuring instruments such as infrared radiation thermometers are desirable.
According to the present embodiment, if the flame temperature of each burner 8a to 8d is controlled so as to be always constant, the solid fuel distribution amount distributed to each burner 8a to 8d can be kept uniform.

  FIG. 11 shows still another embodiment of the solid fuel combustion facility provided with the fuel distributor 20 according to the present invention. In the present embodiment, distribution amount adjusting devices 20a to 20d (distribution amount adjusting devices 20b to 20c are not shown) are connected to the connecting portions of the fuel distribution unit 6 and the fuel pipes 7a to 7d (pipes 7b and 7c are not shown). And solid fuel flow rate measuring devices 32a to 32d (the flow rate measuring devices 32b to 32d are not shown) are provided in the middle of the fuel pipes 7a to 7d, and the fuel furnace 9 is provided with solid fuel burners 8a to 8d (burner). Flame temperature measuring devices 34a to 34d (measuring devices 34b to 34d are not shown). The measured values 33a to 33d of the flow rate measuring devices 32a to 32d and the measured values 35a to 35d of the flame temperature measuring devices 34a to 34d (the measured values 35b to 35d are not shown) are the controllers 30 of the distribution amount adjusting devices 20a to 20d. Sent to.

Then, the control commands 31a to 31d of the distribution amount adjusting devices 20a to 20d are calculated so as to make the solid fuel flow rates of the fuel pipes 7a to 7d uniform, and are sent to the distribution amount adjusting devices 20a to 20d.
In the present embodiment, by simultaneously measuring the solid fuel flow rate and the flame temperature in this way, the reliability of the measurement value is improved, and the measurement result is reflected in the control of the distribution amount adjusting devices 20a to 20d. Appropriate control becomes possible.

  The fuel distribution device and the fuel distribution method of the present invention are used in a coal fired boiler plant or the like in a facility in which a solid fuel such as coal is pulverized by a pulverizer and then supplied to a burner by an air flow and burned. As a device for adjusting and supplying the distribution amount of the solid particulate matter, a burner for ultra-low NOx combustion such as a two-stage combustion system can be used. In addition, since the fuel distribution device and fuel distribution method of the present invention can be adjusted from the outside and can be controlled under various conditions, various combustion devices other than boilers, such as a garbage incinerator, can be used in various technical fields. Application is possible.

It is a block diagram of the fuel distribution apparatus of the solid fuel combustion facility which concerns on this Embodiment. It is a perspective view which shows one Example of the concrete structure of the solid fuel distribution amount adjustment apparatus which concerns on this invention. FIG. 3 is a longitudinal sectional view of the solid fuel distribution amount adjusting device passing through the central axis of the fuel pipe shown in FIG. 2, and FIG. 3A shows a case where the cylindrical member is not projected to the inner wall of the fuel distribution unit; FIG. 3B shows a case where the cylindrical member protrudes to the inner wall of the fuel distributor. It is a perspective view which shows one Example of the concrete structure of the solid fuel distribution amount adjustment apparatus which concerns on this invention. It is a top view explaining the arrangement | positioning relationship between the fuel piping connected to the fuel distributor shown in FIG. 4, and a board | plate material. FIG. 6 is a vertical cross-sectional view of the solid fuel distribution adjustment device passing through the central axis of the fuel pipe shown in FIG. It is a perspective view which shows one Example of the concrete structure of the solid fuel distribution amount adjustment apparatus which concerns on this invention. FIG. 8 is a longitudinal sectional view taken along the line CC of the solid fuel distribution adjustment device passing through the central axis of the fuel pipe shown in FIG. 7. 1 is an overall configuration diagram including a fuel supply control mechanism of an embodiment of a solid fuel combustion facility equipped with a fuel distributor according to the present invention. 1 is an overall configuration diagram including a fuel supply control mechanism of an embodiment of a solid fuel combustion facility equipped with a fuel distributor according to the present invention. 1 is an overall configuration diagram including a fuel supply control mechanism of an embodiment of a solid fuel combustion facility equipped with a fuel distributor according to the present invention. It is a block diagram of the fuel distribution apparatus of the solid fuel combustion installation of a prior art example. It is a top view of the crushing apparatus which provided the fuel distribution part which concerns on a prior art or this invention in the top part.

Explanation of symbols

1 Charging pipe (raw material supply pipe) 2 Grinding table 3 Grinding roller (grinding ball) 4 Throat (air jet outlet)
DESCRIPTION OF SYMBOLS 5 Classifier 6 Fuel distribution part 7 Fuel piping 8 Solid fuel burner 9 Furnace 10 Restriction part 11 of distribution part inlet Flow control valve 12 Classifier drive motor 13 Access door 20 Distribution amount adjustment apparatus 21 Cylindrical member 22 Cylindrical member movement apparatus 23 Plate material 24 Plate material moving device 25 Air injection port 26 Air flow rate adjustment valve 27 Air jet 30 Controller 31 Control command 32 Flow rate measurement device 33 Flow rate measurement value 34 Flame temperature measurement device 35 Flame temperature measurement value
41 Solid fuel flow introduced into fuel pipe 42 Solid fuel flow not introduced into fuel pipe 43 Solid fuel swirl direction 50 Solid fuel 51 Hot air supply port 52 Coal flow 53 moving from the crushing section to the classifier Coal flow passing through the classifier 54 Coal flow falling to the grinding section

Claims (12)

A pulverizing unit for pulverizing the solid fuel, and a distributing unit for distributing the solid fuel pulverized in the pulverizing unit to each fuel pipe for supplying the mixed fuel to a plurality of solid fuel combustion burners after entraining the gas with a carrier gas In a fuel distribution device of a solid fuel combustion facility having
A fuel distribution device for a solid fuel combustion facility, characterized in that a distribution amount adjusting means is provided for adjusting the distribution amount of the solid fuel independently for each connection portion of the distribution portion and each fuel pipe.   2. The fuel of a solid fuel combustion facility according to claim 1, wherein the distribution amount adjusting means includes a resistance means for receiving a resistance when the solid fuel introduced from the distribution portion into the fuel pipe is introduced. Dispensing device.   The fuel distribution device for a solid fuel combustion facility according to claim 1, wherein the distribution unit is provided with a classification unit for classifying the mixed fluid introduced from the pulverization unit.   The distribution amount adjusting means has a cylindrical member movable at a connection portion between the fuel distribution portion and each fuel pipe, and the position of the cylindrical member can be adjusted. A fuel distribution device for a solid fuel combustion facility according to any one of the above.   4. The distribution amount adjusting means according to claim 1, further comprising: a plate member movable at a connection portion between the fuel distribution portion and each fuel pipe, wherein the position of the plate member can be adjusted. A fuel distribution device for a solid fuel combustion facility according to claim 1.   The distribution amount adjusting means includes an air injection port at a connection portion between the fuel distribution unit and each fuel pipe, and an air jet is introduced from the air injection port into the fuel distribution unit or the fuel pipe. The fuel distribution device for a solid fuel combustion facility according to any one of claims 1 to 3. A flow rate measuring device for detecting a mass flow rate of the solid fuel in the fuel pipe and / or one or more flame temperature measuring devices for detecting a flame temperature of each solid fuel burner;
7. A control device for controlling a distribution amount of solid fuel by each of the distribution amount adjusting means according to a measured value by the flow rate measuring device and / or the flame temperature measuring device. A fuel distribution device for a solid fuel combustion facility according to any one of the above. In the fuel distribution method using the fuel distribution apparatus of the solid fuel combustion facility according to any one of claims 1 to 7,
In a fuel distribution device for a solid fuel combustion facility, the distribution amount of solid fuel supplied to each solid fuel burner is controlled by the distribution amount adjusting means according to the mass flow rate of the solid fuel in each fuel pipe. Fuel distribution method. In the fuel distribution method using the fuel distribution apparatus of the solid fuel combustion facility according to any one of claims 1 to 7,
The distribution amount of the solid fuel supplied to each solid fuel burner is controlled by the distribution amount adjusting means according to the flame temperature of each solid fuel burner, and the fuel distribution of the fuel distribution device of the solid fuel combustion facility Method. In the fuel distribution method using the fuel distribution apparatus of the solid fuel combustion facility according to any one of claims 1 to 7,
The distribution amount of the solid fuel supplied to each solid fuel burner by the respective distribution amount adjusting means according to the measurement value of the mass flow rate of the solid fuel in each fuel pipe and the measurement value of the flame temperature of each solid fuel burner. A fuel distribution method for a fuel distribution device of a solid fuel combustion facility. In the fuel distribution method using the fuel distribution apparatus of the solid fuel combustion facility according to any one of claims 1 to 7,
Each of the distribution amounts so that the fuel distribution amount distributed to each burner of the burner stage composed of a plurality of solid fuel burners at the same height of the furnace of the solid fuel combustion facility is uniform or nearly uniform in the same burner stage A fuel distribution method for a fuel distribution device of a solid fuel combustion facility, wherein the amount of distribution of the solid fuel is controlled by an adjusting means. In the fuel distribution method using the fuel distribution apparatus of the solid fuel combustion facility according to any one of claims 1 to 7,
Each of the distribution amount adjustments so that the fuel distribution amount distributed to each burner of the burner stage composed of a plurality of solid fuel burners at the same height of the furnace of the solid fuel combustion facility is individually adjusted in the same burner stage A fuel distribution method for a fuel distribution device of a solid fuel combustion facility, characterized in that the distribution amount of the solid fuel is controlled by means.

Images