JP7155910B2 - Sintering machine gas sampling device and sintering machine - Google Patents

Description

TECHNICAL FIELD The present invention relates to a technique for sampling combustion exhaust gas of raw materials loaded on pallet trucks in a sintering machine having a plurality of pallet trucks arranged adjacent to each other on an endless track.

The sintering machine has a plurality of pallet trucks arranged on an endless track. A plurality of pallets are adjacent to each other to form a continuous transport conveyor. Raw materials for sintering are loaded on a series of pallets and transported. During transport, the fuel, such as coke breeze, in the loaded raw material is ignited. After ignition, the iron ore is heated and partially melted to produce sintered ore by burning the coke fine in the raw material. Underneath the pallets loaded with raw material are a series of wind boxes that create a negative pressure. The windboxes are connected to the induced draft fan via ducts. That is, the gas inside the wind box group is sucked by the induced exhaust fan and exhausted through the duct. The flue gas from the raw material loaded on the pallet truck is sucked into the wind box. Therefore, the raw material is always supplied with air from above.

The temperature and composition of the flue gas sucked into the wind box change depending on the combustion state of the raw materials loaded on the pallet truck. Also, the temperature and composition of the gas in the windbox will change due to wind leaks. The inventors paid attention to these matters and studied measuring the temperature and composition of the gas in the wind box.

Conventionally, in the field of blast furnaces, there have been probes for blast furnaces for measuring the temperature, pressure, composition, and gas flow rate of gases in blast furnaces, or for sampling raw materials in blast furnaces. As a blast furnace sonde, for example, Japanese Patent No. 2791692 (Patent Document 1) proposes a type in which a lance is inserted into the furnace from outside.

Regarding the sintering machine, for example, Japanese Patent No. 5298629 (Patent Document 2) discloses a laser oxygen concentration meter. This laser oxygen concentration meter emits a laser beam in the width direction of the pallet truck in the wind box, receives it with a light receiver, and measures the oxygen concentration in the optical path. Further, for example, Japanese Patent No. 4826129 (Patent Document 3) discloses measuring the combustion exhaust gas temperature with thermocouples at a plurality of locations in the machine length direction of the sintering machine. The measured temperature is used to predict the hottest ingredient temperature location on the pallet truck. The pallet speed is controlled so that the highest temperature position is the set position.

Japanese Patent No. 2791692 Japanese Patent No. 5298629 Japanese Patent No. 4826129

The inventors examined the detection of the combustion state of the raw material of the pallet truck and the occurrence of air leakage by analyzing the gas in the wind box. In the sintering machine, it is difficult to detect the location of air leakage by measuring the temperature and oxygen concentration in the conventional technology.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a sintering machine gas sampling device and a sintering machine that can detect the location of the leaked air in the wind box of the sintering machine.

A sintering machine gas sampling device according to an embodiment of the present invention includes a plurality of gas sampling pipes inserted into a wind box provided below a pallet truck loaded with raw materials for sintering and transported on an endless track. a sampling tube set comprising: The gas inlets of the plurality of gas sampling pipes are arranged side by side in the width direction of the pallet truck inside the wind box.

According to the disclosure of the present application, it is possible to provide a sintering machine gas sampling device and a sintering machine that are capable of detecting the position of the leaked air in the wind box of the sintering machine.

FIG. 1 is a side view of a sintering machine. FIG. 2 is a cross-sectional view taken along line AA of FIG. FIG. 3 is an enlarged cross-sectional view of the vicinity of region R1 in FIG. FIG. 4 is a bottom view of the vicinity of the gas inlet shown in FIG. FIG. 5 is a diagram for explaining the flow of dust in the wind box. 6 is a cross-sectional view taken along line BB of FIG. 2. FIG. FIG. 7 is an enlarged cross-sectional view of the vicinity of region R2 in FIG. FIG. 8 is a diagram showing a configuration example of a device connected to a gas sampling pipe. FIG. 9 is a diagram showing a display example of the distribution of the physical quantity of gas in the width direction. FIG. 10 is a diagram showing a display example of the distribution of physical quantities of gas in the width direction and the movement direction.

The inventors have considered a configuration for analyzing the temperature and composition of the gas in the windbox. We investigated a configuration for sampling gas by inserting a gas sampling pipe into the wind box. In the study, the inventors have come up with a configuration in which a plurality of gas sampling pipes are regarded as one set, and the respective gas suction ports of the plurality of gas sampling pipes are arranged side by side in the width direction of the pallet truck. The inventors have found that by analyzing the gas obtained with this configuration, it is possible to detect the position of the leakage wind entering the wind box. Based on this knowledge, the following configurations of the embodiments were conceived.

(Configuration 1)
The sintering machine gas sampling device in configuration 1 of the embodiment of the present invention is a sampling device in which at least a part of the gas sampling device is located inside a wind box provided below a pallet truck loaded with sintering raw materials and moving on an endless track. Equipped with tube set. The sampling tube set includes a plurality of gas sampling tubes. A gas inlet is formed in each of the plurality of gas sampling pipes. The gas inlets of the plurality of gas sampling pipes are arranged side by side in the width direction of the pallet truck inside the wind box.

According to Configuration 1 above, the gas inlets of the plurality of gas sampling tubes included in the sampling tube set are aligned in the width direction inside the wind box. As a result, a single set of sampling tubes can simultaneously sample gas at a plurality of positions in the width direction inside the wind box. Here, the inventors have found that the distribution of gas components in the width direction changes when leaked air enters the wind box of the sintering machine. Therefore, when leaked air enters the wind box, the position of the leaked air can be detected based on the gas simultaneously sampled by the plurality of gas sampling pipes. It should be noted that wind leakage is the flow of air that enters the windbox without contributing to the combustion of the material on the pallet truck. Moreover, according to the configuration 1, in addition to the detection of air leakage, it is possible to detect the change in the width direction of the combustion state of the raw material on the pallet truck.

(Configuration 2)
In configuration 1 above, the sintering machine gas sampling device may further include a temperature sensor that detects the temperature of the gas at the gas inlet of each of the plurality of gas sampling pipes. Thereby, information on the temperature distribution in the width direction of the wind box can be obtained. For example, by combining gas information sampled by a plurality of gas sampling pipes with the temperature distribution, it is possible to detect a more accurate position of the leaked air. It is also possible to detect changes in the combustion state of raw material on the pallet truck in the width direction. A temperature sensor is provided near the gas inlet. For example, if the gas inlet is at the tip of the gas sampling tube, a temperature sensor can be provided at the tip. Note that the temperature sensor may be provided either inside or outside the gas sampling pipe.

(Composition 3)
In configuration 1 or 2 above, a plurality of the sampling pipe sets may be arranged side by side in the movement direction of the pallet truck. This provides information on the distribution of the gas components in both the width direction and the movement direction of the pallet truck.

(Composition 4)
In any one of configurations 1 to 3 above, the gas inlets of the plurality of gas sampling pipes may be downward openings. This makes it difficult for dust falling downward from the pallet truck to enter from the gas inlet of the gas sampling pipe.

(Composition 5)
In any one of the configurations 1 to 4 above, the sampling tube set may include a guide tube accommodating the plurality of gas sampling tubes inside the wind box. The guide pipe is formed with a plurality of openings aligned in the width direction corresponding to the positions of the gas inlets of the plurality of gas sampling pipes. Thereby, the gas passing through each of the plurality of openings of the guide tube enters each of the plurality of gas sampling gas inlets. This allows multiple gas sampling tubes to be installed in the wind box by inserting the guide tube into the wind box. This facilitates installation of the sampling tube set. The state in which the plurality of openings of the guide pipe correspond to the positions of the gas inlets of the plurality of gas sampling pipes is, for example, when viewed from below, at least a portion of the plurality of openings of the guide pipe respectively correspond to the positions of the plurality of gas sampling ports. It can be in overlap with the gas inlet of the tube. The gas sampling tube may protrude out of the guide tube through the opening of the guide tube, and the gas inlet of the gas sampling tube is arranged inside the guide tube at a position corresponding to the opening of the guide tube. good too.

(Composition 6)
In configuration 5 above, the guide pipe penetrates through one of both widthwise walls of the wind box and is supported by the inner surface of the other of the widthwise both side walls of the wind box. good too. As a result, the guide pipe can be configured to pass through one wall of both sides in the width direction of the wind box and not pass through the other wall. Therefore, it is not necessary to make a hole for passing the guide pipe in the other wall of both sides in the width direction of the wind box. Also, the guide pipe can be arranged from one wall to the other of both sides in the width direction of the wind box. Therefore, it becomes easier to disperse and dispose the gas suction ports of the plurality of gas sampling pipes in the width direction.

(Composition 7)
In the above configuration 5 or 6, in the longitudinal direction of the gas sampling pipe, the dimension of each of the plurality of openings of the guide pipe is larger than the longitudinal dimension of the outer periphery of the gas inlet of each of the plurality of gas sampling pipes. can be done. Thereby, the outer circumference of the gas inlet of the gas sampling tube can be moved relative to the edge of the opening of the guide tube in the longitudinal direction of the gas sampling tube. As a result, thermal expansion of the gas sampling pipe in the longitudinal direction prevents the outer circumference of the gas suction port from coming into contact with the opening of the guide pipe, thereby preventing damage to the gas sampling pipe or the guide pipe. Note that the gas sampling pipe is an elongated pipe formed in a long shape. As an example, when the gas inlet is formed at the tip of the gas sampling tube, the longitudinal dimension of the opening of the guide tube can be larger than the longitudinal dimension of the outer circumference of the tip of the gas sampling tube.

(Composition 8)
In the above configuration 3, the sintering machine gas sampling device is configured to measure the amount of gas in the moving direction and width direction of the pallet truck based on the information on the gas obtained using the plurality of gas sampling pipes in the plurality of sampling pipe sets. A data processing unit that generates data representing a two-dimensional distribution of physical quantities may be further provided. As a result, data representing the two-dimensional distribution of the physical quantity of gas in the width direction and movement direction of the pallet truck in the wind box of the sintering machine can be obtained. Therefore, it is possible to more accurately detect the position of the leaked air in the wind box or the combustion state of the material on the pallet truck. The information about the gas obtained using a plurality of gas sampling pipes is, for example, the analysis result of the gas sampled through the gas sampling pipe, or the physical quantity of the gas, such as the temperature sensor provided at the gas inlet of the gas sampling pipe. It contains the information obtained by the measuring sensor. The physical quantity of gas includes, for example, the amount of a specific component contained in the gas, temperature, pressure, and the like.

(Composition 9)
In any one of the configurations 1 to 8, the sintering machine gas sampling device includes a pump connected to the plurality of gas sampling pipes for sucking gas in the gas sampling pipes, and the plurality of gas sampling pipes and the pump. and a connection between the plurality of gas sampling pipes and the atmosphere. As a result, the switching valve can be used to switch between the operation of sucking and sampling the gas in the wind box through the plurality of gas sampling pipes and the operation of ventilating the flow paths of the plurality of gas sampling pipes with the atmosphere and purging the inside of the pipes. can be done.

(Configuration 10)
A sintering machine according to an embodiment of the present invention includes a plurality of pallet trucks that move on an endless track, a wind box provided below the track on which the pallet trucks loaded with sintering raw materials move, and the wind box. a sampling tube set at least partially located therein. The sampling tube set includes a plurality of gas sampling tubes. A gas inlet is formed in each of the plurality of gas sampling pipes. The gas inlets of the plurality of gas sampling pipes are arranged side by side in the width direction of the pallet truck inside the wind box.

In this specification, the moving direction is the direction in which the pallet truck on the track loaded with raw materials advances. The direction of movement is perpendicular to the vertical direction. The width direction is a direction perpendicular to the movement direction and the vertical direction. That is, when the vertical direction is vertical, the moving direction and width direction are horizontal. The movement direction of the pallet truck may be provided with a gradient in all or part of the movement range of the pallet truck. The movement direction can also be referred to as the transport direction.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The same reference numerals are given to the same or corresponding parts in the drawings, and the description thereof will not be repeated.

(Embodiment 1)
<Configuration example of sintering machine>
FIG. 1 is a side view showing a configuration example of a sintering machine 100 according to this embodiment. FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1. FIG. The sintering machine 100 comprises a plurality of pallet trucks 2 arranged adjacent to each other on an endless track. The endless track K includes an upper track Ku and a lower track Kd. On the upper track Ku of the endless track K, the pallet truck 2 loaded with raw material for sintering is conveyed in the direction indicated by the arrow Y1 from the ore supply side KS toward the ore discharge side HS. In FIG. 1 and the following drawings, an orthogonal coordinate system is used in which the moving direction is the y-axis, the width direction is the x-axis, and the vertical direction is the z-axis.

As shown in FIG. 1, on the upper track Ku of the endless track K, a bedding hopper 71, a feed hopper 72, and an ignition furnace 73 are arranged from the ore supply side KS toward the ore discharge side HS. be. The bedding hopper 71 feeds relatively coarse iron ore onto the pallet truck 2 . The iron ore fed from the bedding hopper 71 covers the fire grate that is the bottom of the raw material storage section of the pallet truck 2 . The ore supply hopper 72 feeds relatively fine fine ore to the pallet truck 2 . Coke is mixed with the fine ore that is fed. The ignition furnace 73 ignites the surface of the raw material for sintering stored in the pallet truck 2 . Due to the ignition, combustion starts from the upper layer of the sintering raw material on the pallet truck 2 . By the time the pallet truck 2 reaches the end of the waste ore side HS of the upper track Ku, the combustion reaches the bottom layer of sintering material on the pallet truck 2 . The pallet truck 2 is reversed at the end of the ore discharge side HS of the upper track Ku. As a result, the sintered ore on the pallet truck 2 is discharged.

A plurality of wind boxes 3 are arranged below the pallet truck 2 of the upper track Ku of the endless track K. A plurality of wind boxes 3 are arranged side by side in the moving direction. That is, a plurality of wind boxes 3 are provided in an area where the pallet truck 2 loaded with sintering raw materials is conveyed. The spaces within the plurality of wind boxes 3 are interconnected and isolated from the atmosphere. A suction pipe 15 is connected to each of the wind boxes 3 . The suction tube 15 is connected to a duct (not shown). The duct leads to an induced draft fan (not shown). The gas in the wind box 3 is sucked into the induced exhaust fan through the suction pipe 15 and the duct.

The wind box 3 is isolated from the atmosphere. The inside of the wind box 3 becomes a negative pressure. The combustion exhaust gas of the raw materials on the pallet truck 2 is sucked into the wind box 3 . The wind box 3 establishes the interface between the negative pressure space below the pallet truck 2 and the atmosphere.

A plurality of sampling tube sets 4 are provided below the pallet truck 2 in the wind box 3 . A plurality of sampling tube sets 4 are arranged side by side in the movement direction. In the example shown in FIG. 1, a plurality of sampling tube sets 4 are distributed over the direction of movement of the plurality of wind chests 3 . The plurality of sampling tube sets 4 are arranged in the movement direction at approximately equal intervals. As an example, one sampling tube set 4 can be arranged in each wind chest 3 .

As shown in FIG. 2, sampling tube set 4 includes a plurality of gas sampling tubes 41-45. The gas suction ports 41a-45a of the plurality of gas sampling pipes 41-45 are arranged side by side in the width direction in the wind box 3. As shown in FIG. That is, the widthwise positions of the gas inlets 41a to 45a of the plurality of gas sampling pipes 41 to 45 included in one sampling pipe set 4 are different from each other. As a result, one sampling tube set 4 can simultaneously sample gas from a plurality of locations in the wind box 3 in the width direction.

In the example shown in FIG. 2, the gas suction ports 41a-45a of the plurality of gas sampling pipes 41-45 are arranged at regular intervals in the width direction. The gas inlets 41a to 45a are distributed over substantially the entire width of the wind box 3 . The gas sampling pipes 41 to 45 extend in the width direction and are inserted into the wind box 3 . The longitudinal direction, that is, the axial direction of the gas sampling pipes 41 to 45 in the wind box 3 is substantially the same as the width direction. One ends of the gas sampling pipes 41-45 are positioned inside the wind box 3 as gas inlets 41a-45a, and the other ends are positioned outside the wind box 3. As shown in FIG.

The sampling tube set 4 comprises a guide tube 46 housing a plurality of gas sampling tubes 41 - 45 inside the windbox 3 . The guide tube 46 has a plurality of openings arranged in the width direction. The gas inlets 41a-45a of the plurality of gas sampling pipes 41-45 are arranged in the plurality of openings of the guide pipe 46, respectively. That is, the plurality of openings of the guide pipe 46 are provided at positions corresponding to the gas suction ports 41a-45a of the plurality of gas sampling pipes 41-45.

A plurality of gas sampling pipes 41 to 45 are arranged inside the wind box 3 while being housed in a guide pipe 46 . The internal space of the guide tube 46 communicates with the wind box 3 through an opening. The internal space of the guide tube 46 is isolated from the atmosphere. The guide pipe 46 penetrates one side wall 31 a of the side walls on both sides in the width direction of the air box 3 . The guide tube 46 is supported on the inner surface of the side wall 31b opposite to the side wall 31a of the wind box 3 . That is, the guide pipe 46 passes through one side wall 31a of the wind box 3 in the width direction and does not pass through the other side wall 31b.

One longitudinal end 46 a of the guide tube 46 is positioned outside the wind box 3 , and the other longitudinal end 46 b is positioned inside the wind box 3 . One end 46a of the guide tube 46 is closed with a lid. A plurality of gas sampling pipes 41 to 45 pass through a lid that closes one end 46a of the guide pipe 46. As shown in FIG. The other end 46b of the guide tube 46 is supported by a projection protruding inward from the other side wall 31b of the wind box 3 .

As shown in FIG. 2 , the pallet truck 2 includes a pallet frame 21 and a plurality of great bars 22 arranged on the pallet frame 21 . A plurality of great bars 22 form a grate. A pair of wheels 6 are rotatably attached to both ends of the pallet frame 21 in the width direction. Axles of the pair of wheels 6 extend in the width direction. The raw materials for sintering are loaded on the grate.

Wheels 6 roll on rails 8 extending in the direction of movement. A pair of wear bars 5 extending in the moving direction are arranged on the inner side of the rail 8 in the width direction. The weir bars 5 are supported by side walls 31 a and 31 b on both sides in the width direction of the wind box 3 . The side walls 31a, 31b of the windbox 3 are weir bar supports. The side walls 31a, 31b of the wind box 3, which are integrally configured with the weir bar support, are provided on the floor surface F. As shown in FIG. Above the floor surface F, rails 8 of the upper track are also provided. The weir bar support and the rails 8 of the upper track are supported on the floor surface F. Lower side walls 32a, 32b of the windbox 3 are provided below the floor F. The space inside the wind box 3 extends above and below the floor surface F. Note that the side walls 31a and 31b of the wind box 3 and the wear bar support may be configured integrally or may be configured separately. A wear bar 5 is arranged below the pallet truck 2 .

A pair of seal bars 23 extending in the movement direction is inserted into each of two recesses formed in the lower surface of the pallet frame 21 . Each of the pair of seal bars 23 is attached to the pallet frame 21 so as to be vertically movable. When the pallet truck 2 is loaded with raw materials and conveyed, the seal bar 23 moves relative to the weir bar 5 in the moving direction while the lower surface of the seal bar 23 is in contact with the upper surface of the weir bar 5 . That is, the seal bar 23 slides on the wear bar 5 .

In the example shown in FIG. 2, the sampling tube set 4 is attached to a weir bar support. That is, the sampling tube set 4 is provided at a position lower than the weir bar 5 and higher than the floor surface F. This makes it easier to detect the position of the air leakage or the combustion state of the raw material using the sampling pipe set 4 . Further, the gas suction ports 41a to 45a of the plurality of gas sampling pipes 41 to 45 are distributed between the pair of weir bars 5 in the width direction. This makes it easier to detect the position of the air leak or the combustion state of the raw material.

FIG. 3 is an enlarged cross-sectional view of the gas sampling pipe 41 shown in FIG. 2 near the gas suction port 41a (R1). In the example shown in FIG. 3, the vicinity of the tip of the gas sampling pipe 41 is bent downward. The tip of the gas sampling pipe 41 is open and serves as a gas suction port 41a. The gas inlet 41a is a downward opening. The gas suction port 41a is exposed from the opening 46c of the guide pipe 46. As shown in FIG. The opening 46c of the guide tube 46 is also a downward opening.

In the example shown in FIG. 3 , a thermocouple 51 is provided at the gas inlet 41 a of the gas sampling pipe 41 . An end portion of the thermocouple 51, that is, a temperature detection portion, is arranged near the gas inlet 41a. A thermocouple 51 is led out of the wind box 3 through the gas sampling tube 41 . A thermocouple 51 measures the temperature near the gas inlet 41a. In the example shown in FIG. 3, the end of the thermocouple 51 is positioned outside the gas sampling pipe 41 near the gas inlet 41a. The end of the thermocouple 51 may be placed inside the gas sampling tube 41 near the gas inlet 41a. Thermocouple 51 is an example of a temperature sensor. Temperature sensors are not limited to thermocouples.

FIG. 4 is a bottom view of the vicinity of the gas inlet 41a shown in FIG. In the example shown in FIG. 4, the dimension W2 of the opening 46c of the guide tube 46 is larger than the dimension W1 of the tip of the gas sampling tube 41 in the longitudinal direction of the gas sampling tube. A portion including the tip 41af of the gas sampling pipe 41 is relatively movable in the longitudinal direction of the gas sampling pipe 41 with respect to the opening 46c of the guide pipe 46 . That is, the tip 41af of the gas sampling tube 41 is not fixed to the edge 46cf of the opening 46c of the guide tube 46. As shown in FIG. Also, the portion including the tip 41af of the gas sampling pipe 41 does not contact the edge 46cf of the opening 46c of the guide pipe 46 in the longitudinal direction. As a result, it is possible to prevent the gas sampling pipe 41 and the guide pipe 46 from exerting forces on each other and causing cracks due to the difference in the amount of thermal expansion between the gas sampling pipe 41 and the guide pipe 46 in the longitudinal direction. The difference (W2-W1) between the opening 46c of the guide pipe 46 and the tip 41af of the gas sampling pipe 41 in the longitudinal direction is larger than the estimated difference in the amount of thermal expansion between the gas sampling pipe 41 and the guide pipe 46 in the longitudinal direction. can do. In the direction perpendicular to the longitudinal direction, the dimension of the tip 41af of the gas sampling tube 41 may be the same as the dimension of the opening 46c of the guide tube 46, or may be smaller than the dimension of the opening 46c. Note that the tip 41af of the gas sampling pipe 41 is an example of the outer periphery of the gas suction port 41a.

In the example shown in FIGS. 3 and 4, a flange 61 is provided at the tip of the gas sampling pipe 41 . The flange 61 is positioned outside the opening 46c of the guide tube 46. As shown in FIG. Flange 61 does not contact guide tube 46 . Flange 61 can be formed from a nut or a plate. Note that the flange 61 may be omitted.

The gas inlets 42a-45a of the other gas sampling tubes 42-45 of the gas sampling tube 41 can also be downward openings. This makes it difficult for dust to enter from the gas inlet 41a. FIG. 5 is a diagram for explaining the flow of dust in the wind box 3. FIG. Dust falls from the pallet truck 2 into the wind box 3. In the windbox 3, the dust falls from above to below due to gravity. On the other hand, the gas entering the gas sampling pipe 41 through the downward opening 46c of the guide pipe 46 and the gas suction port 41a of the gas sampling pipe 41 flows from bottom to top in the opposite direction of the dust flow. Therefore, dust is less likely to enter the gas sampling pipe 41 through the opening 46c and the gas suction port 41a.

Preferably, the lower half of the guide tube 46 is provided with an opening 46c and the upper half is not provided with an opening. Further, by providing the gas suction ports 41a to 45a in the lower halves of the gas sampling pipes 41 to 45, the gas suction ports 41a to 45a can be opened downward. In addition, the gas suction ports 41a to 45a can be opened downward by covering the edge regions of the gas suction ports 41a to 45a with other portions of the gas sampling pipes 41 to 45. can be done.

6 is a cross-sectional view taken along line BB of FIG. 2. FIG. In the example shown in FIG. 6, the gas sampling tubes 42, 43, 44 are overlapping as viewed in the direction of movement. Moreover, the gas sampling pipes 41, 43, and 45 overlap each other when viewed from above and below. In this way, of the plurality of gas sampling pipes 41 to 45 included in the sampling pipe set 4, two or more gas sampling pipes 42, 43, 44 overlap each other when viewed from the movement direction, and two or more gas sampling pipes 41 , 43 and 45 can be arranged so as to overlap each other when viewed in the vertical direction. As a result, the plurality of gas sampling pipes 41 to 45 can be collectively arranged compactly.

FIG. 7 is an enlarged cross-sectional view of the vicinity of region R2 in FIG. FIG. 7 shows an example of a sealing mechanism between the side wall 31 b of the wind box and the guide tube 46 . In the example shown in FIG. 7, a packing 48 that contacts the entire circumferential direction of the outer peripheral surface of the guide tube 46 and a flange 47 that holds the packing 48 are attached without a gap to the side wall 31b of the wind box. The flange 47 is provided on the outer side in the circumferential direction of the packing 48 and holds the packing 48 from the outer side in the circumferential direction. A fitting 49 is provided between the windbox side wall 31 b and the flange 47 . One end of the fixture 49 is tightly attached to the side wall 31 b and the other end is tightly attached to the flange 47 . The fitting 49 and the flange 47 are secured together by fasteners 47a. Thus, by providing a sealing mechanism for sealing the gap between the side wall 31b of the wind box and the guide pipe 46, wind leakage can be suppressed. Note that the sealing mechanism is not limited to the example shown in FIG.

FIG. 8 is a diagram showing a configuration example of a device connected to a gas sampling pipe. In the example shown in FIG. 8 , the pump 14 is connected to the gas sampling pipe 41 outside the wind box 3 . The pump 14 sucks the gas inside the gas sampling pipe 41 . A first valve 11 is provided between the gas sampling pipe 41 and the pump 14 . A second valve 12 is provided in the flow path of the gas sampling pipe 41 for switching between ventilation and disconnection between the flow path in the gas sampling pipe 41 and the atmosphere. The second valve 12 is provided in the flow path between the gas inlet 41 a and the first valve 11 . Further, gas analyzers 13a to 13c are provided in the flow path of the gas sampling pipe 41. As shown in FIG. Gas analyzers 13 a - 13 c are provided in the flow path between first valve 12 and pump 14 .

The gas analyzers 13 a - 13 c analyze the components of the gas flowing through the gas sampling pipe 41 . In the example of FIG. 8, a plurality of gas analyzers are provided for one gas sampling pipe. A plurality of gas analyzers detect different gas components. Gas components detected by the gas analyzer are, for example, oxygen O ₂ , carbon monoxide CO, carbon dioxide CO ₂ , water H ₂ O, nitrogen oxides NO _x , or sulfur oxides SO _x . can be done. A gas analyzer may have a sensor that detects a particular component contained in the gas. Note that only one gas analyzer may be provided for one gas sampling pipe.

The thermocouple 51 has its end located at the gas inlet 41a. A lead wire of the thermocouple 51 passes through the inside of the gas sampling pipe 41 and is led out of the wind box 3 . Outside the wind box 3 , the leads of the thermocouple 51 are led out of the gas sampling tube 41 . The thermocouple 51 and the gas analyzers 13a to 13c are connected to the data processing section . The connection between the thermocouple 51 and the data processing unit 7 and the connection between the gas analyzers 13a to 13c and the data processing unit 7 may be wired or wireless.

In the configuration shown in FIG. 8, when the gas inside the wind box 3 is sucked, the first valve 11 is opened and the second valve 12 is closed. In this case, the gas in the vicinity of the gas inlet 41 a of the wind box 3 is sucked into the gas sampling pipe 41 by the pump 14 sucking the gas in the gas sampling pipe 41 . The gas sucked into the gas sampling pipe 41 passes through the gas analyzers 13a-13c. Components in the gas are detected by gas analyzers 13a-13c. Data of the detection results of the gas analyzers 13a to 13c are sent to the data processing section 7. FIG. The data processing unit 7 also receives the detection result of the thermocouple 51 . The data processing unit 7 receives information indicating physical quantities of gas components from the gas analyzers 13a to 13c, and receives information about the temperature of the gas from the thermocouple 51. FIG.

When purging and cleaning the gas sampling pipe 41, the first valve 11 is closed and the second valve 12 is opened. In this case, since the inside of the wind box 3 has a negative pressure, the atmosphere is sucked into the gas sampling pipe 41 through the second valve 12 and is expelled from the gas suction port 41a. As a result, dust accumulated in the gas sampling pipe 41 is swept out from the gas suction port 41a. This facilitates, for example, removing dust clogging in the gas sampling pipes 41-45.

Thus, by opening and closing the first valve 11 and the second valve 12, it is possible to switch between the gas analysis operation and the purge operation. The first valve 11 and the second valve 12 are examples of switching valves. Note that the configuration of the switching valve is not limited to the example shown in FIG. For example, one valve may switch between the connection between the gas sampling pipe and the atmosphere and the connection between the gas sampling pipe and the pump.

It should be noted that other gas sampling pipes 42 to 45 can also be connected to pumps, measuring devices, and valves in the same manner as in the example shown in FIG. In this case, the data processing section 7 may be connected to a plurality of gas sampling pipes 41-45. If there are multiple sampling tube sets 4 , the data processing section 7 may be connected to multiple gas sampling tubes 41 to 45 in each of the multiple sampling tube sets 4 . Also, the device connected to the gas sampling pipe is not limited to the example shown in FIG. For example, a pressure gauge may be placed at the gas inlet of the gas sampling tube.

The data processing unit 7 provides a two-dimensional distribution of the physical quantity of the gas in the movement direction and width direction of the wind box 3 based on the information on the gas obtained using the plurality of gas sampling pipes 41 to 45 in the plurality of sampling pipe sets 4. may generate data indicating The data processing unit 7 acquires data indicating the physical quantity of the gas obtained from each of the plurality of gas sampling pipes 41 to 45 in the plurality of sampling pipe sets 4 as information about the gas. Here, each physical quantity acquired by the data processing unit 7 is also added with information indicating which gas sampling tube of which sampling tube 4 the physical quantity was obtained. Further, the physical quantity of gas includes, for example, a value indicating the amount of a specific component contained in the gas, the temperature of the gas, the pressure of the gas, and the like. The data processing unit 7 assigns coordinates in a two-dimensional coordinate system having two axes, the moving direction and the width direction, to the gas physical quantities obtained from the gas sampling pipes 41 to 45, respectively. The coordinates assigned to each physical quantity can be determined by the information added to each physical quantity indicating the sampling pipe set and gas sampling pipe from which the physical quantity is obtained. In this way, data representing the two-dimensional distribution of physical quantities of gas is generated. The data processing unit 7 may also perform interpolation processing and contour diagram generation processing. The data processing unit 7 can display the two-dimensional distribution of the physical quantity of the gas on the display device 9 . Note that the process of generating data representing a two-dimensional distribution is not limited to the above example.

Note that the data processing unit 7 may generate data indicating the distribution of the physical quantity of gas in the width direction based on the information about the gases of the plurality of gas sampling tubes 41 to 45 in one sampling tube set 4 .

The data processing section 7 can be composed of a processor or a circuit. The processing of the data processing unit 7 described above can be realized, for example, by causing the processor to operate based on a program recorded in the memory.

FIG. 9 is a diagram showing a display example of the distribution of the physical quantity of gas in the width direction. In the example shown in FIG. 9, a graph showing the oxygen concentration of the gas sampled by each of the plurality of gas sampling tubes 41 to 45 in the sampling tube set 4 is displayed. In FIG. 9, a diagram showing the measurement positions of the gas sampling pipes 41 to 45 is shown in association with the graphs G1 to G3. In the graphs G1 to G3, the horizontal axis is the position in the width direction, and the vertical axis is the oxygen concentration. A graph G1 shows the distribution of the oxygen concentration in the width direction under normal conditions. Graph G2 shows the distribution of the oxygen concentration in the width direction when there is air leakage from the left seal bar and there is no air leakage from the right seal bar when viewed from the moving direction.

In graph G2, the oxygen concentration at the left end in the width direction is higher than normal. Therefore, the administrator who sees this graph G2 can understand that there is air leakage from the left seal bar. In graph G3, the oxygen concentration at the center in the width direction is higher than normal. Therefore, an administrator who sees this graph G3 can understand that, for example, there is a possibility that the great bar near the center in the width direction of the pallet truck 2 has fallen off. In this way, the position of the leaked air can be detected based on the information on the oxygen concentration distribution in the width direction.

FIG. 10 is a diagram showing a display example of the distribution of physical quantities of gas in the width direction and the movement direction. In the example shown in FIG. 10, a contour map K1 generated based on temperatures measured in each of the plurality of gas sampling tubes 41 to 45 in the plurality of sampling tube sets 4 is displayed. In FIG. 10, a diagram showing the measurement positions in the sintering machine is shown in association with the contour diagram K1. In the contour diagram K1, the horizontal axis indicates the position in the movement direction, and the vertical axis indicates the position in the width direction. The contour map K1 shows a two-dimensional temperature distribution in the moving direction and the width direction. With this contour map K1, the temperature distribution can be visualized on the plane of the sintering machine viewed from above.

The present invention is not limited to the above embodiments. For example, although the sintering machine 100 is provided with a plurality of sampling tube sets 4 in the above embodiment, the sintering machine 100 may be provided with one sampling tube set 4 . Also, in the above example, the thermocouple may be omitted. Further, the gas suction ports 41a-45a of the gas sampling pipes 41-45 are not limited to the tips of the gas sampling pipes 41-45, and may be provided, for example, on the sidewalls of the gas sampling pipes or other portions.

Although one embodiment of the present invention has been described above, the above-described embodiment is merely an example for carrying out the present invention. Therefore, the present invention is not limited to the above-described embodiment, and can be implemented by appropriately modifying the above-described embodiment without departing from the scope of the invention.

2: Pallet truck 3: Wind box 31a, 31b: Side wall of wind box (ware bar support)
4: Sampling tube set
41 to 45: gas sampling pipe 41a to 45a: gas inlet 46: guide pipe 100: sintering machine

Claims (9)

A sampling tube set at least partially positioned inside a wind box provided below a pallet truck loaded with sintering material and moving on an endless track,
the sampling tube set includes a plurality of gas sampling tubes;
A gas inlet is formed in each of the plurality of gas sampling pipes,
The gas inlets of the plurality of gas sampling pipes are arranged side by side in the width direction of the pallet truck inside the wind box ,
a pump connected to the plurality of gas sampling pipes for sucking gas in the gas sampling pipes;
a gas suction connection that connects the plurality of gas sampling pipes and the pump to suck the gas in the wind box from the gas suction port; and a connection that connects the plurality of gas sampling pipes to the atmosphere to suck the gas. A sintering machine gas sampling device, further comprising a switching valve for switching a purge connection for discharging gas from a port to said wind box . 2. The sintering machine gas sampling apparatus of claim 1, further comprising a temperature sensor for detecting the temperature of gas at the gas inlet of each of said plurality of gas sampling tubes. comprising a plurality of said sampling tube sets,
3. The sintering machine gas sampling device according to claim 1 or 2, wherein said plurality of said sampling pipe sets are arranged side by side in the moving direction of said pallet truck. The sintering machine gas sampling device according to any one of claims 1 to 3, wherein the gas inlets of the plurality of gas sampling tubes are downward openings. the sampling tube set includes a guide tube housing the plurality of gas sampling tubes inside the windbox;
5. The guide pipe according to any one of claims 1 to 4, wherein a plurality of openings arranged in the width direction corresponding to the positions of the gas inlets of the plurality of gas sampling pipes are formed in the guide pipe. A sinterer gas sampling device as described. 6. The guide pipe according to claim 5, wherein the guide pipe passes through one side wall of both side walls in the width direction of the wind box, and is supported on the inner surface of the other side wall of the side walls on both width direction sides of the wind box. A sinterer gas sampling device as described. 7. The claim 5 or 6, wherein the dimension of each of the plurality of openings of the guide tube in the longitudinal direction of the gas sampling tube is greater than the longitudinal dimension of the outer perimeter of the gas inlet of each of the plurality of gas sampling tubes. sintering machine gas sampling device. Data processing for generating data indicating a two-dimensional distribution of physical quantities of gas in the moving direction and width direction of the pallet truck based on the information about the gas obtained using the plurality of gas sampling pipes in the plurality of sampling pipe sets. 4. The sinterer gas sampling device of claim 3, further comprising a section. a plurality of pallet trucks that move on an endless track;
A wind box provided below the track on which the pallet truck loaded with the raw material for sintering moves;
a sampling tube set at least partially located within the windbox;
the sampling tube set includes a plurality of gas sampling tubes;
A gas inlet is formed in each of the plurality of gas sampling pipes,
The gas inlets of the plurality of gas sampling pipes are arranged side by side in the width direction of the pallet truck inside the wind box ,
a pump connected to the plurality of gas sampling pipes for sucking gas in the gas sampling pipes;
a gas suction connection that connects the plurality of gas sampling pipes and the pump to suck the gas in the wind box from the gas suction port; and a connection that connects the plurality of gas sampling pipes to the atmosphere to suck the gas. and a switching valve for switching between a purge connection for discharging gas from a port to the windbox.

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