JPWO2019221282A1 - Coke dry fire extinguishing equipment - Google Patents

Abstract

The coke dry fire extinguishing equipment includes a cooling tower 3 having a cooling chamber surrounded by a wall portion 3a, a gas supply unit provided in the cooling tower and supplying gas to the cooling chamber, and a gas supply unit among the walls of the cooling tower. A small flue 13 formed vertically above the portion and opening to the cooling chamber, and a small flue provided in the small flue, the small flue is provided in the radial direction of the cooling tower with respect _{to the upper flue 13c 1 and the upper flue. A partition member 100 for partitioning the lower flue 13c 2} located on the outside, and a pressure detecting unit 200 for detecting at least the pressure of the lower flue are provided.

Description

The present disclosure relates to coke dry fire extinguishing equipment.

Conventionally, coke dry fire extinguishing equipment is known. The coke dry fire extinguishing system extinguishes and cools the coke extruded from the coke oven. The coke dry fire extinguishing system is equipped with a cooling tower. In the cooling tower, a spare chamber and a cooling chamber continuous below the spare chamber are formed inside. Coke (red-hot coke) is charged into the reserve chamber from the top of the cooling tower. Coke (red coke) moves from the reserve chamber to the cooling chamber. The cooling chamber is supplied with an inert gas from the bottom. The coke is extinguished and cooled by heat exchange with the inert gas.

The cooling tower is formed with a plurality of small flues opening in the cooling chamber in the circumferential direction. The inert gas rises in the cooling chamber while extinguishing and cooling the coke. The inert gas is discharged from the small flue to the outside of the cooling chamber.

Patent Documents 1 and 2 disclose a so-called two-stage flue type coke dry fire extinguishing system in which a partition member is provided in a small flue. In a two-stage flue type coke dry fire extinguishing system, an upper flue and a lower flue are formed in a small flue by a partition member.

Coke enters the small flue through the upper end of the opening of the cooling chamber, pushed by the gas flow. On the other hand, the coke that has entered the small flue is dragged by the coke that descends into the cooling chamber and returns to the cooling chamber. In this way, a flow of coke occurs in the small flue. In the two-stage flue type in which the small flue is partitioned into a plurality of flues, the total amount of coke entering the small flue is reduced as compared with the single flue type in which no partition member is provided. Therefore, the two-stage flue type can improve the ventilation capacity as compared with the single flue type.

Japanese Patent No. 4137676 Japanese Unexamined Patent Publication No. 2016-23230

In the coke dry fire extinguishing system, coke intrudes and escapes into the small flue continuously. At this time, the balance between the amount of coke that invades the small flue (hereinafter referred to as "invasion coke") and the amount of coke that escapes from the small flue (hereinafter referred to as "escape coke") is lost, and the amount of invading coke escapes. If the amount of coke is significantly exceeded, normal operation becomes impossible.

Therefore, in a general coke dry fire extinguishing system, the small flue is visually recognizable from the inspection port on the ceiling of the annular flue so that the amount of coke in the small flue can be monitored. However, in the above-mentioned two-stage flue type coke dry fire extinguishing equipment, the partition member obstructs the visual inspection of the small flue, which may make it difficult to monitor the amount of coke in the small flue.

In view of the above issues, the present disclosure aims to provide a coke dry fire extinguishing system capable of easily monitoring a dangerous amount of coke in a small flue.

In order to solve the above problems, the coke dry fire extinguishing equipment according to one aspect of the present disclosure includes a cooling tower having a cooling chamber surrounded by a wall, and a gas supply provided in the cooling tower to supply gas to the cooling chamber. Of the part and the wall part of the cooling tower, a small flue formed above the gas supply part in the vertical direction and opening to the cooling chamber, and a plurality of small flues provided in the small flue in the vertical direction. A partition member for partitioning the flue and, at least, a pressure detecting unit for detecting the pressure of the lowermost flue located at the lowermost position in the vertical direction among the plurality of flues.

Further, the pressure detection unit includes a lower detection unit that detects the pressure of the lowermost flue, an upper detection unit that detects the pressure above the lower detection unit in the vertical direction, a pressure detected by the lower detection unit, and an upper portion. It may include a differential pressure derivation unit that derives a differential pressure from the pressure detected by the detection unit.

Further, the upper detection unit may detect the pressure above the upper end of the partition member in the vertical direction.

Further, a control unit that gives a predetermined notification when the differential pressure derived by the differential pressure derivation unit exceeds a preset threshold value may be provided.

Further, the pressure detection unit may be provided in a plurality of different small flues.

According to the present disclosure, the amount of dangerous coke in the small flue can be easily monitored.

FIG. 1 is a diagram illustrating a coke dry fire extinguishing system. FIG. 2 is a cross-sectional view taken along the line II-II of FIG. FIG. 3 is a perspective view of the partition member. FIG. 4 is a sectional view taken along line IV-IV of FIG. FIG. 5 is a plan view of the partition member in four directions. FIG. 6 is a diagram illustrating an attached state of the partition member. FIG. 7 is a sectional view taken along line VII-VII of FIG. FIG. 8 shows a state in which the partition member is removed from FIG. 7. FIG. 9 is a diagram illustrating a state in which the amount of invading coke is increased. FIG. 10 is a flowchart illustrating an example of control processing of the coke dry fire extinguishing system. FIG. 11 is a diagram illustrating a coke dry fire extinguishing system of the first modification. FIG. 12 is a diagram illustrating a partition member of the second modification. FIG. 13 is a diagram illustrating a partition member of the third modification. FIG. 14 is a diagram illustrating a partition member of the fourth modification.

An embodiment of the present disclosure will be described in detail below with reference to the accompanying drawings. The dimensions, materials, other specific numerical values, etc. shown in such an embodiment are merely examples for facilitating understanding, and do not limit the present disclosure unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are designated by the same reference numerals to omit duplicate description, and elements not directly related to the present disclosure are omitted from the illustration. To do.

FIG. 1 is a diagram illustrating a coke dry fire extinguishing system 1. FIG. 2 is a cross-sectional view taken along the line II-II of FIG. As shown in FIG. 1, the coke dry fire extinguishing system 1 includes a cooling tower 3. The cooling tower 3 includes a wall portion 3a formed in an annular shape. The cooling tower 3 is provided with a spare chamber 5 and a cooling chamber 7 surrounded by a wall portion 3a. The spare chamber 5 includes an input port 5a formed at the top of the wall portion 3a. Coke is charged into the cooling tower 3 from the inlet 5a. The cooling chamber 7 is a space continuous with the spare chamber 5 and is provided below the spare chamber 5. At the bottom of the cooling chamber 7, a gas supply port 7a (gas supply unit) penetrating the wall portion 3a is formed. A circulating gas mainly composed of an inert gas such as nitrogen is supplied into the cooling tower 3 from the gas supply port 7a. Further, a gas distribution mechanism 9 is provided at the bottom of the cooling chamber 7. The gas distribution mechanism 9 divides the circulating gas supplied into the cooling tower 3 from the gas supply port 7a.

An annular flue 11 is formed in a portion of the wall portion 3a that surrounds the reserve chamber 5. The annular flue 11 is an annular hole extending in the circumferential direction of the wall portion 3a. Further, the wall portion 3a is provided with a plurality of small flues 13 having an opening 13a opened in the cooling chamber 7. The small flue 13 is located above the gas supply port 7a and the gas distribution mechanism 9 in the wall portion 3a in the vertical direction. A plurality of small flues 13 are formed so as to be separated from each other in the circumferential direction of the cooling tower 3. The small flue 13 communicates the annular flue 11 with the cooling chamber 7. That is, the small flue 13 is a passage connecting the cooling chamber 7 and the annular flue 11. The circulating gas is discharged from the cooling chamber 7 to the annular flue 11 via the small flue 13.

In the present embodiment, the portion of the wall portion 3a that separates the annular flue 11 and the reserve chamber 5 is referred to as an inner side wall portion 3b. That is, of the wall portion 3a, the radial inner side of the annular flue 11 is the inner side wall portion 3b. Therefore, the opening 13a on the cooling chamber 7 side of the small flue 13 is located below the inner side wall portion 3b. In the present embodiment, the spare chamber 5 is a space above the opening 13a of the small flue 13. The opening 13a opens into the cooling chamber 7. That is, the upper end portion of the opening 13a of the small flue 13 serves as a boundary between the spare chamber 5 and the cooling chamber 7.

The inner diameter of the cooling chamber 7 is larger than the inner diameter of the spare chamber 5. In other words, the inner diameter of the portion of the wall portion 3a surrounding the cooling chamber 7 is larger than the inner diameter of the inner side wall portion 3b. The inner peripheral surface of the wall portion 3a is provided with an inclined surface 3c whose inner diameter gradually increases downward from the lower end of the inner side wall portion 3b. An opening 13a of the small flue 13 is formed on the inclined surface 3c. Therefore, the opening 13a of the small flue 13 is inclined with respect to the vertical direction. The inner peripheral surface of the inner side wall portion 3b may be provided with a protrusion protruding inward in the radial direction of the cooling tower 3.

As shown in FIG. 2, the wall portion 3a is formed with an annular bottom portion 11a of the annular flue 11. The annular bottom portion 11a extends in an annular shape, and the upper opening 13b of the small flue 13 opens to the annular bottom portion 11a. A plurality of air supply ports 15 are provided in the annular bottom portion 11a. The air supply port 15 is located between adjacent upper openings 13b. As shown in FIG. 1, branch pipes 17 are connected to each of the plurality of air supply ports 15. The plurality of branch pipes 17 are connected to the fan 21 via the main pipe 19. The main pipe 19 supplies combustion air to the air supply port 15 via the branch pipe 17. The branch pipe 17 is provided with a flow rate adjusting valve 23 for adjusting the flow rate of combustion air. A control valve 25 is provided in the main pipe 19.

The coke dry fire extinguishing system 1 includes a gravity settling dust collector 31. The dust collector 31 has a dust removing wall portion 31a connected to the cooling tower 3. A flue 33 is formed in the dust removal wall portion 31a. The dust removal wall portion 31a is integrally formed with the wall portion 3a of the cooling tower 3. The dust removing wall portion 31a extends in the radial direction of the cooling tower 3 from the wall portion 3a. That is, in the portion of the wall portion 3a that surrounds the annular flue 11, a communication port 3d that opens the annular flue 11 to the outside of the wall portion 3a is formed over a part in the circumferential direction. The dust removing wall portion 31a extends in the radial direction of the cooling tower 3 from the outer peripheral surface of the wall portion 3a so as to cover the periphery of the communication port 3d. As a result, the flue 33 formed in the dust removal wall portion 31a communicates with the annular flue 11 via the communication port 3d.

The dust removing wall portion 31a includes a tapered portion 31b that inclines downward so as to be separated from the cooling tower 3. Therefore, the cross-sectional area of the flue 33 increases as the distance from the cooling tower 3 increases. Further, an escape outlet 31c is formed in the dust removing wall portion 31a forming the bottom surface of the flue 33. The downstream end of the tapered portion 31b is connected to the escape outlet 31c. As will be described in detail later, the circulating gas discharged from the cooling tower 3 to the flue 33 contains dust. The dust in the circulating gas is separated from the circulating gas by gravity in the process of flowing through the flue 33, and is discharged to the outside of the system from the escape outlet 31c.

The coke dry fire extinguishing system 1 includes a boiler 41. The boiler 41 is provided after the dust collector 31. The boiler 41 recovers the sensible heat of coke from the circulating gas that has passed through the dust remover 31. The boiler 41 includes a boiler wall portion 41a that is continuous with the dust removal wall portion 31a. Here, the boiler wall portion 41a is integrally formed with the dust removing wall portion 31a. A screen tube 43, which is a part of a boiler tube for generating steam, is provided in the boiler wall portion 41a. The screen tubes 43 are arranged in parallel with a gap so that the circulating gas can pass through. Inside the boiler wall portion 41a, a heat exchange pipe 45 through which a heat medium flows is provided. Heat exchange is performed between the heat medium circulating inside the heat exchange pipe 45 and the circulating gas circulating inside the boiler wall portion 41a, and the sensible heat of coke is recovered.

A circulation duct 47 is connected to the boiler 41. The circulation duct 47 is connected to the downstream side of the boiler wall portion 41a in the circulation gas flow direction with respect to the heat exchange pipe 45. The suction side of the circulation blower 51 is connected to the circulation duct 47. The discharge side of the circulation blower 51 is connected to the gas supply port 7a of the cooling tower 3. The circulating gas that has passed through the boiler 41 is blown into the cooling tower 3 by the circulating blower 51.

According to the above-mentioned coke dry fire extinguishing equipment 1, coke (red hot coke) is charged into the cooling tower 3 from the inlet 5a. In the cooling tower 3, the spare chamber 5 and the cooling chamber 7 are filled with coke. Circulating gas is supplied into the cooling tower 3 by the circulation blower 51 via the gas supply port 7a and the gas distribution mechanism 9. The circulating gas cools the coke in the process of rising in the cooling chamber 7. The coke cooled by the circulating gas is cut out from the lower part of the cooling chamber 7. According to the amount of coke cut out from the cooling chamber 7, coke is newly charged into the cooling tower 3 from the inlet 5a.

The circulating gas that has cooled the coke is discharged to the annular flue 11 via the small flue 13. At this time, combustion air is supplied from the air supply port 15 provided at the annular bottom portion 11a of the annular flue 11. The combustion air is mixed with the high-temperature circulating gas immediately after passing through the small flue 13. The combustion air burns the flammable gas (hydrogen, carbon monoxide) contained in the mixed gas. The circulating gas is guided from the annular flue 11 to the dust collector 31. In the process of flowing through the flue 33, the circulating gas is separated into dust by gravity sedimentation. The dust separated from the circulating gas is discharged to the outside of the system from the escape outlet 31c.

The circulating gas from which the dust has been separated is guided to the boiler 41. As for the circulating gas, the sensible heat of coke is recovered by the screen pipe 43 and the heat exchange pipe 45. The circulating gas cooled by heat recovery is sucked by the circulating blower 51 through the circulating duct 47. The circulating gas sucked into the circulation blower 51 is again supplied into the cooling tower 3 from the gas supply port 7a.

Here, the small flue 13 is provided with a partition member 100. The coke-dry fire extinguishing system 1 of the present embodiment is composed of a multi-stage flue type in which the small flue 13 is partitioned into a plurality of flues (passages) by a partition member 100. In the present embodiment, a two-stage flue type in which the small flue 13 is divided into two flues (passages) by a partition member 100 will be described.

FIG. 3 is a perspective view of the partition member 100. FIG. 4 is a sectional view taken along line IV-IV of FIG. FIG. 5 is a plan view of the partition member 100 in four directions. The partition member 100 includes a flat plate-shaped main body 102. Hereinafter, the x direction shown in FIG. 3 is referred to as the width direction of the main body 102, and the y direction shown in FIG. 3 is referred to as the longitudinal direction of the main body 102. As shown in FIG. 4, the main body 102 is formed by laminating a refractory material on a metal (for example, stainless steel) plate 104.

Specifically, the plate member 104 includes a flat plate-shaped flat surface portion 104a and a pair of side surface portions 104b. The side surface portions 104b are provided at both ends of the flat surface portion 104a in the width direction. The side surface portion 104b has a cross-sectional shape in which both ends of the flat plate shape are bent by approximately 90 degrees. The pair of side surface portions 104b face each other in the width direction of the main body portion 102. The flat surface portion 104a and the side surface portion 104b extend by the same length in the longitudinal direction. In this embodiment, the flat surface portion 104a and the side surface portion 104b are composed of separate members. However, the present invention is not limited to this, and the flat surface portion 104a and the side surface portion 104b may be formed by bending one member.

The plate member 104 has a cross-sectional shape in which the side surface portion 104b is projected at an angle of approximately 90 degrees on the front surface side and the back surface side of the flat surface portion 104a. On the front surface side of the flat surface portion 104a, a refractory layer 106 (shown by cross-hatching in FIG. 4) made of a refractory material is provided in a portion surrounded by the flat surface portion 104a and the side surface portion 104b. In other words, the main body 102 is formed by laminating a refractory material on a plate member 104. Here, the refractory layer 106 is composed of an amorphous refractory (castable refractory, refractory concrete) in which a binder is mixed with an aggregate obtained by crushing the refractory.

A plurality of reinforcing members 108 are provided on the plate member 104. The reinforcing member 108 is composed of rod members such as castable anchors and anchor bolts. The reinforcing member 108 is made of metal. The reinforcing member 108 is formed, for example, in a V shape. However, the reinforcing member 108 may have a shape different from the V-shape, such as a U-shape, a J-shape, or an L-shape. The reinforcing member 108 is welded to the plate member 104. However, the reinforcing member 108 may be fastened to the plate material 104 or may be fitted to the plate material 104. The plurality of reinforcing members 108 are arranged apart from each other in the width direction of the main body 102. The plurality of reinforcing members 108 are arranged apart from each other in the longitudinal direction of the main body 102. That is, the plurality of reinforcing members 108 are arranged in a grid pattern or a staggered pattern on the main body 102. The reinforcing member 108 has a V-shaped portion embedded in the refractory layer 106. In other words, the V-shaped portion of the reinforcing member 108 is covered with an amorphous refractory material. In this way, the reinforcing member 108 is arranged in the refractory layer 106.

The refractory layer 110 is provided on the side opposite to the refractory layer 106 with the flat surface portion 104a as a boundary, that is, on the back side of the plate member 104. Here, the refractory layer 110 is composed of a standard refractory material (refractory brick or refractory heat insulating brick). As described above, in the main body 102 of the partition member 100, the refractory layer 106 is laminated on the front surface side of the plate material 104, and the refractory layer 110 is laminated on the back surface side of the plate material 104. In other words, in the main body 102, the plate member 104 is covered with the refractory layers 106 and 110.

Here, the refractory layer 106 is made of an amorphous refractory material, and the refractory layer 110 is made of a standard refractory material. That is, the refractory provided in the main body 102 includes an amorphous refractory. However, for example, both the refractory layers 106 and 110 may be composed of an amorphous refractory material or a standard refractory material. Further, the refractory layer 106 may be made of a standard refractory material, and the refractory layer 110 may be made of an amorphous refractory material. Furthermore, only one of the refractory layers 106 and 110 may be provided.

As shown in FIGS. 3 and 5, the partition member 100 includes a pair of locking portions 120 provided on both side surfaces of the main body portion 102 in the width direction. The pair of locking portions 120 are separated from each other in the width direction of the main body portion 102. The locking portion 120 is provided at one end (upper end) of the main body portion 102 in the longitudinal direction and projects toward the back surface side of the main body portion 102. Of the locking portions 120, the bottom portion 120a protruding toward the back surface side from the main body portion 102 extends in the horizontal direction (diameter direction of the cooling tower 3) with the partition member 100 attached to the small flue 13. .. The locking portion 120 includes a fitting portion 122 that projects vertically from the bottom portion 120a. The fitting portion 122 is continuous with the bottom portion 120a on the side separated from the main body portion 102.

The locking portion 120 may be made of an amorphous refractory material or may be made of a standard refractory material. For example, the refractory layer 106 of the main body 102 may be extended to form the locking portion 120 (fitting portion 122). Further, the refractory layer 110 of the main body 102 may be extended to form the locking portion 120 (fitting portion 122). Further, the plate member 104 of the main body 102 may be projected in the width direction, and the protruding portion of the plate member 104 may be covered with a refractory material to form the locking portion 120.

Further, as shown in FIG. 5, the partition member 100 includes a leg portion 130 on the back surface side of the main body portion 102. The leg portion 130 projects at a substantially right angle to the back surface of the main body portion 102. The leg portion 130 is located near the center of the main body portion 102 in the width direction and the longitudinal direction. The length of the leg portion 130 in the width direction is shorter than the length of the main body portion 102 in the width direction. Further, the length of the leg portion 130 in the longitudinal direction is shorter than the length of the main body portion 102 in the longitudinal direction. The leg portion 130 is provided above the lower end in the longitudinal direction of the main body portion 102 in the vertical direction. Here, the leg portion 130 is made of the same standard refractory material as the refractory material layer 110 provided on the back surface side of the main body portion 102. However, the material of the leg 130 is not particularly limited, and may be made of metal, a refractory material, or a combination thereof.

FIG. 6 is a diagram illustrating an attached state of the partition member 100. FIG. 7 is a sectional view taken along line VII-VII of FIG. FIG. 8 shows a state in which the partition member 100 is removed from FIG. 7. As described above, a plurality of small flues 13 are provided so as to be separated from each other in the circumferential direction of the wall portion 3a. Hereinafter, among the wall portions 3a surrounding the small flue 13, the portion of the wall portion 3a that faces the inner side wall portion 3b in the radial direction of the cooling tower 3 will be described as the outer wall portion 3e. A portion connecting the inner side wall portion 3b and the outer wall portion 3e will be described as a connecting wall portion 3f (see FIG. 8).

As shown in FIG. 6, the small flue 13 includes a lower passage 13c and an upper passage 13d. The lower passage 13c extends obliquely upward from the opening 13a. The upper passage 13d is continuous above the lower passage 13c and extends along the vertical direction. The upper passage 13d includes an upper opening 13b (see FIG. 2) that opens into the annular bottom 11a of the annular flue 11 described above.

A support wall portion 3g is provided on the wall portion 3a (connecting wall portion 3f) surrounding the small flue 13. In FIG. 6, the support wall portion 3 g is shown in black for easy understanding. As shown in FIG. 8, the support wall portion 3g is provided on the facing surface of the wall portion 3a facing in the circumferential direction. That is, two support wall portions 3g are arranged to face each other in the small flue 13 so as to be separated from each other in the circumferential direction. The support wall portion 3g projects from the wall portion 3a toward the inside of the small flue 13. The support wall portion 3g includes a horizontal portion 3g ₁ and an inclined portion 3g ₂ . As shown in FIG. 6, the horizontal portion 3g ₁ is located above the opening 13a of the small flue 13 in the vertical direction. The horizontal portion 3g ₁ is located in the upper passage 13d. The horizontal portion 3g ₁ extends in the horizontal direction. The inclined portion 3g ₂ extends downward from the horizontal portion 3g ₁ and is located in the lower passage 13c. The inclined portion 3g ₂ is inclined so that the lower end side is located inward in the radial direction with respect to the upper end side.

The partition member 100 is placed on the support wall portion 3g. Specifically, the bottom portion 120a of the partition member 100 is placed on the horizontal portion 3g _1. Further, both side surfaces of the main body 102 in the width direction are placed on the inclined portion 3g _2. As described above, side surface portions 104b made of a metal plate material are provided on both side surfaces of the main body portion 102 in the width direction (see FIG. 4). The side surface portion 104b will be placed on the inclined portion 3g _2.

The fitting portion 122 projects downward in the vertical direction from _{the horizontal portion 3g 1. The horizontal portion 3g 1} is sandwiched between the back surface of the main body portion 102 and the fitting portion 122. This prevents the partition member 100 from falling off. In this way, the partition member 100 is held in the small flue 13 by the support wall portion 3g. When the partition member 100 is held in the small flue 13, the tip portion of the leg portion 130 in the protruding direction comes into contact with the wall portion 3a. However, a slight gap may be formed between the tip portion of the leg portion 130 in the protruding direction and the wall portion 3a while the partition member 100 is held in the small flue 13.

The partition member 100 divides the lower passage 13c of the small flue 13 into two flues. That is, the lower passage 13c of the small flue 13 is divided into an _{upper flue 13c 1} and a lower flue 13c _2. The lower flue 13c ₂ is located below the upper flue 13c _{1 in the} vertical direction (the wall portion 3a side of the cooling tower 3 (the radial outside of the cooling tower 3)). Here, the lower flue 13c2 is the lowest flue located at the lowermost position in the vertical direction among the plurality of flues. The front surface of the main body 102 of the partition member 100 _{faces the upper flue 13c 1} and the back surface faces the lower flue 13c ₂ . Therefore, the main body 102 of the partition member 100 is provided with a refractory layer 106 (amorphous refractory) on the surface of the _{plate member 104 on the upper flue 13c 1 side.} Further, the main body 102 of the partition member 100 is provided with a refractory layer 110 (standard refractory) on the surface of the _{plate member 104 on the lower flue 13c 2 side.} The leg 130 of the partition member 100 is provided on the _{lower flue 13c 2.} The leg portion 130 extends from the back surface of the main body portion 102 facing the _{lower flue 13c 2 toward the wall portion 3a.}

As shown in FIG. 6, coke enters the small flue 13 through the opening 13a. The invading coke that has entered the small flue 13 comes into contact with the partition member 100. That is, the partition member 100 comes into contact with the invading coke in a state of being exposed to a high temperature atmosphere, and the powder coke collides with the partition member 100. Therefore, the partition member 100 is in a state of being easily worn by coke. Since the partition member 100 of the present embodiment has a main body 102 in which a refractory is laminated on a metal plate 104, it has high heat resistance and abrasion resistance. Therefore, the service life of the partition member 100 is extended, and the frequency of maintenance can be reduced. The temperature, flow velocity, and powdered coke in the gas vary depending on the operating conditions such as the charged coke temperature. Therefore, the material of the partition member 100 may be determined for each plant.

A load of coke acts on the main body 102 of the partition member 100 _{from the upper flue 13c 1 side.} In the main body 102, the plate member 104 and the refractory layer 106 are integrated by the reinforcing member 108. Therefore, the partition member 100 can sufficiently withstand the load of coke. The main body 102 is pressed outward in the radial direction of the cooling tower 3 by the load of coke acting from the upper flue 13c _{1 side.} Legs 130 are provided on the back side of the main body 102. Therefore, the load of coke acts on the wall portion 3a via the leg portion 130. Further, both ends of the main body portion 102 in the width direction are supported by the support wall portion 3g. Therefore, the load of coke is received by the wall portion 3a, and the creep strength of the partition member 100 is improved.

Since the partition member 100 only needs to be placed on the support wall portion 3g, the replacement work is easy and the operating rate of the coke dry fire extinguishing equipment 1 can be increased.

The height of the invading coke in the lower flue 13c ₂ is lower than the height of the invading coke in _{the upper flue 13c 1.} The leg 130 is provided above the height position of the invading coke in _{the lower flue 13c 2 during normal operation.} That is, by providing the leg portion 130 above the lower end of the main body portion 102, contact with the coke is avoided, and the ventilation ability is not adversely affected. On the other hand, a part or the whole of the leg portion 130 is provided in a range lower than the height of the invading coke in _{the upper flue 13c 1 in the main body portion 102.} As described above, the leg portion 130 extends from the vicinity of the center of the main body portion 102 toward the lower end side. Due to the legs 130, _{the load of the invading coke acting on the main body 102 from the upper flue 13c 1} side is likely to act on the wall 3a of the cooling tower 3. However, the arrangement and shape of the legs 130 are not limited to this.

During the operation of the coke dry fire extinguishing equipment 1, the coke invades and escapes into the small flue 13 continuously. At this time, the balance between the amount of coke entering the small flue 13 and the amount of coke escaping from the small flue 13 may be lost. If the amount of invading coke greatly exceeds the amount of escape coke, normal operation becomes impossible. Therefore, it is necessary to constantly monitor the amount of coke in the small flue 13.

However, when the partition member 100 is provided, the visibility of the small flue 13 is lowered, and it may be difficult to monitor the amount of coke in the small flue 13. If the amount of invading coke is left unnoticed even though it has exceeded the limit, the amount of invading coke will increase without permission, leading to an irreversible state. Therefore, a means for constantly monitoring the amount of invading coke in the small flue 13 and knowing the amount of invading coke is important.

The coke-dry fire extinguishing system 1 of the present embodiment includes a pressure detection unit 200 for estimating the amount of coke in the small flue 13. The pressure detection unit 200 includes a lower detection unit 200a, an upper detection unit 200b, and a differential pressure lead-out unit 200c. The lower detection unit 200a includes _{a pipe having one end opened to the lower flue 13c 2} and the other end connected to the differential pressure lead-out unit 200c. The lower detection unit 200a detects the pressure of the _{lower flue 13c 2.} The upper detection unit 200b includes a pipe having one end opened in the upper passage 13d and the other end connected to the differential pressure lead-out unit 200c. The upper detection unit 200b detects the pressure in the lower detection unit 200a of the small flue 13, more strictly, the pressure above the upper end of the partition member 100 in the vertical direction (here, the upper passage 13d). The differential pressure derivation unit 200c derives the differential pressure between the pressure detected by the lower detection unit 200a and the pressure detected by the upper detection unit 200b.

In this embodiment, the pressure detection unit 200 is provided in a plurality of different small flues 13. Specifically, as shown in FIG. 2, four pressure detecting units 200 are provided so as to be separated from each other in the circumferential direction of the cooling tower 3. These pressure detection units 200 are approximately 90 degrees in the circumferential direction, except for one pressure detection unit 200 arranged in the vicinity of the communication port 3d communicating with the flue 33 of the dust collector 31 in the cooling tower 3. They are arranged out of phase.

As shown in FIG. 6, the lower detection unit 200a detects _{the pressure of the lower flue 13c 2} above the position where the coke can invade during the normal operation of the coke dry fire extinguishing equipment 1. Therefore, if the amount of intruding coke in the small flue 13 is within an appropriate range, the difference between the pressure detected by the lower detection unit 200a and the pressure detected by the upper detection unit 200b is small.

FIG. 9 is a diagram illustrating a state in which the amount of invading coke is increased. When the balance between the amount of invading coke into the small flue 13 and the amount of coke escaping from the small flue 13 is lost, the _{amount of invading coke in the upper flue 13c 1} increases, as shown in FIG. In this case, _{the invading coke in the upper flue 13c 1} gets over the partition member 100 and invades the lower flue 13c ₂ from above. As a result, the amount of invading coke _{in the lower flue 13c 2 increases.} At this time, in the lower flue 13c ₂ , when the intruding coke blocks the lower detection unit 200a, the pressure detected by the lower detection unit 200a increases.

As a result, the difference between the pressure detected by the lower detection unit 200a and the pressure detected by the upper detection unit 200b becomes large. As described above, _{the differential pressure between the lower flue 13c 2} and the upper passage 13d has a correlation (proportional relationship) with the amount of coke in the small flue 13. Therefore, the amount of intruding coke in the small flue 13 can be estimated from the differential pressure between the _{lower flue 13c 2 and the upper passage 13d.}

The coke dry fire extinguishing equipment 1 includes a control unit 202 and a notification unit 204. The control unit 202 performs a determination process for determining whether the differential pressure derived by the differential pressure derivation unit 200c is equal to or higher than a preset threshold value. The notification unit 204 includes a speaker, a display unit, and the like that output an alarm. The control unit 202 outputs an alarm from the notification unit 204 when it is determined by the determination process that the differential pressure is equal to or greater than the threshold value.

FIG. 10 is a flowchart illustrating an example of control processing of the coke dry fire extinguishing equipment 1. The control unit 202 repeats the process shown in FIG. 10 at predetermined time intervals. The control unit 202 acquires the differential pressure from the pressure detection unit 200 (differential pressure derivation unit 200c) (S1). The control unit 202 performs a determination process for determining whether the acquired differential pressure is equal to or higher than a preset threshold value (S2). Then, when it is determined that the differential pressure is equal to or higher than the threshold value (YES in S3), the control unit 202 outputs an alarm from the notification unit 204 and starts a predetermined notification (S4). On the other hand, when it is determined that the differential pressure is not equal to or higher than the threshold value (NO in S3), the control unit 202 determines whether or not the determination process has been completed for all the pressure detection units 200 (S5). Then, if the determination process for all the pressure detection units 200 is completed (YES in S5), the process is terminated. If the determination process is not completed for all the pressure detection units 200 (NO in S5), the above process is repeated for the pressure detection unit 200 for which the determination process has not been performed.

As described above, according to the coke dry fire extinguishing system 1 of the present embodiment, the amount of coke invading the small flue 13 is specified by the differential pressure between the _{lower flue 13c 2 and the upper passage 13d.} Therefore, the amount of intruding coke in the small flue 13 can be accurately and easily monitored.

FIG. 11 is a diagram illustrating a coke dry fire extinguishing system 1A of the first modification. The coke dry fire extinguishing equipment 1A of the first modification is different from the above embodiment in that two partition members 100 are provided in the small flue 13. Therefore, here, the description of the same configuration as that of the above embodiment will be omitted, and the points different from the above embodiment will be described. The coke dry fire extinguishing system 1A includes two support wall portions 3g in the small flue 13. The two support wall portions 3g are provided so as to be separated from each other in the vertical direction. A partition member 100 is placed on each of the two support wall portions 3g. The two partition members 100 are arranged in the small flue 13 so as to be separated in the vertical direction.

The lower passage 13c of the small flue 13 is divided into three flues (passages) _{of the upper flue 13c 1} , the lower flue 13c ₂ and the middle flue 13c _{3 by the two partitioning members 100.} The upper flue 13c ₁ is located above the lower flue 13c ₂ and the middle flue 13c _{3 in the} vertical direction. The lower flue 13c ₂ is located at the lowermost position in the vertical direction among the three flues. That is, in the coke dry fire extinguishing equipment 1A, the lower flue 13c ₂ is the lowest flue located at the lowermost position in the vertical direction among the plurality of flues.

The middle flue 13c ₃ is located between the upper flue 13c ₁ and the lower flue 13c _2. That is, the middle flue 13c ₃ is located between the two partition members 100.

In the leg portion 130 of the partition member 100 provided above in the vertical direction, the surface on the tip end side in the protruding direction comes into contact with the surface of the main body portion 102 of the partition member 100 provided below in the vertical direction. As a result, the load of the invading coke acting on the partition member 100 located relatively upward in the vertical direction is received by the wall portion 3a via the partition member 100 located relatively downward in the vertical direction. .. At least a part of the leg 130 of the partition member 100 that separates the middle flue 13c ₃ and the upper flue 13c ₁ is provided in a range lower than the height of the invading coke in _{the upper flue 13c 1.} Further, at least a part of the leg 130 of the partition member 100 that separates the middle flue 13c ₃ and the lower flue 13c ₂ is provided in a range lower than the height of the invading coke in _{the middle flue 13c 3.} As a result, the load of the invading coke tends to act on the wall portion 3a of the cooling tower 3. However, the arrangement and shape of the legs 130 are not limited to this.

Further, also in the coke dry fire extinguishing equipment 1A, the lower detection unit 200a detects _{the pressure of the lower flue 13c 2} (lowermost flue) located at the lowermost position in the vertical direction among the plurality of flues, as in the above embodiment. ..

As described above, according to the coke dry fire extinguishing equipment 1A of the first modification, the lower passage 13c is divided into three flues. As a result, the ventilation capacity can be further improved.

FIG. 12 is a diagram for explaining the partition member 100A of the second modification. As shown in FIG. 12, the partition member 100A of the second modification is different from the above embodiment in that the refractory layer 110 is not provided on the back surface side of the plate member 104. That is, the back surface side of the flat surface portion 104a of the partition member 100A is exposed. In other words, the partition member 100A is provided with a plate member 104 on the innermost back side (the side facing the flue located relatively lower in the vertical direction) of the main body portion 102.

The load of the invading coke acts on the main body 102. Therefore, bending stress acts on the main body 102 in a direction in which the central side in the width direction projects toward the back side. The partition member 100A is provided with a plate member 104 on the back surface side where the bending stress becomes relatively large. Here, the back surface side of the plate material 104 (that is, the lower flue 13c ₂ side (see FIG. 6)) is relatively colder than the front surface side of the plate material 104 (that is, the upper flue 13c ₁ side (see FIG. 6)). is there. Therefore, the refractory layer 110 of the above embodiment is not provided on the back surface side of the plate member 104 of the second modification. As a result, the partition member 100A of the second modification can be made lighter than the partition member 100 of the above embodiment. Here, a refractory layer 106 composed of an amorphous refractory is provided on the surface side of the plate member 104. However, the present invention is not limited to this, and a refractory layer 110 composed of a standard refractory may be provided on the surface side of the plate member 104.

FIG. 13 is a diagram for explaining the partition member 100B of the third modification. As shown in FIG. 13, the partition member 100B of the third modification is provided with the refractory layer 106 on both the front surface side and the back surface side of the plate member 104. Further, reinforcing members 108 are provided on both the front surface side and the back surface side of the plate member 104. Therefore, the refractory layer 106 provided on both the front surface side and the back surface side of the plate member 104 is provided with the reinforcing member 108. Further, the partition member 100B is curved so that the central side of the main body 102 (plate member 104 and the refractory layer 106) in the width direction protrudes toward the surface side as compared with both end sides.

Here, the refractory layer 106 made of an amorphous refractory is provided on both the front surface side and the back surface side of the plate material 104. However, the present invention is not limited to this, and a refractory layer 110 made of a standard refractory may be provided on either or both of the front surface side and the back surface side of the plate member 104. Further, the main body 102 (plate member 104 and refractory layer 106) may be curved so that the central side in the width direction projects toward the back side as compared with both end sides.

FIG. 14 is a diagram illustrating the partition member 100C of the fourth modification. As shown in FIG. 14, the partition member 100C of the fourth modification is provided with the refractory layer 106 on the surface side of the plate member 104. The partition member 100C is curved so that the central side of the main body 102 (plate member 104 and the refractory layer 106) in the width direction protrudes toward the surface side as compared with both end sides. Here, a refractory layer 106 composed of an amorphous refractory is provided on the surface side of the plate member 104. However, the present invention is not limited to this, and a refractory layer 110 composed of a standard refractory may be provided on the surface side of the plate member 104. Further, the main body 102 (plate member 104 and refractory layer 106) may be curved so that the central side in the width direction projects toward the back side as compared with both end sides.

The partition members 100A, 100B, and 100C of the second modification to the fourth modification can be applied to both the coke dry fire extinguishing equipment 1 of the embodiment and the coke dry fire extinguishing equipment 1A of the first modification. is there.

Further, in the above embodiment and the first modification, the pressure detection unit 200 includes a lower detection unit 200a, an upper detection unit 200b, and a differential pressure lead-out unit 200c. However, the pressure detection unit 200 may include, for example, only the lower detection unit 200a. In this case, the amount of intruding coke may be estimated based on the pressure detected by the lower detection unit 200a. In any case, the pressure detection unit 200 may detect at least the pressure of the _{lower flue 13c 2.}

Further, in the above embodiment and the first modification, the case where the upper detection unit 200b detects the pressure above the upper end of the partition member 100 in the vertical direction, that is, the pressure in the upper passage 13d has been described. _{However, the upper detection unit 200b may detect the pressure of the upper flue 13c 1 or} the pressure of the lower flue 13c ₂ as long as it is above the lower detection unit 200a.

Further, in the above embodiment and the first modification, the pressure detection unit 200 is provided in a plurality of different small flues 13, but only one pressure detection unit 200 may be provided. Further, the pressure detection unit 200 may be provided at any position in the circumferential direction of the cooling tower 3.

Further, in the above embodiment and the first modification, when the differential pressure becomes equal to or higher than the threshold value, the control unit 202 outputs an alarm (predetermined notification) from the notification unit 204. However, the control unit 202 may change the operating conditions in place of the alarm output, or in addition to the alarm output, such as stopping the operation of the coke dry fire extinguishing equipment 1.

Further, in the above embodiment and the first modification, the control unit 202 outputs an alarm when the differential pressure exceeds the threshold value in any one of the plurality of pressure detection units 200. And said. However, an alarm may be output when the differential pressure becomes equal to or higher than the threshold value in the pressure detection units 200 of 2 or more. In this way, false alarms can be prevented.

Further, in the above embodiment, the lower passage 13c is divided into two flues, and in the first modification, the lower passage 13c is divided into three flues, but the lower passage 13c is divided into four or more flues. It may be partitioned into.

Although the embodiments have been described above with reference to the accompanying drawings, it goes without saying that the present disclosure is not limited to such embodiments. It is clear that a person skilled in the art can come up with various modifications or modifications within the scope of the claims, and it is understood that they also naturally belong to the technical scope.

The present disclosure can be used for coke dry fire extinguishing equipment.

1: Coke dry fire extinguishing equipment 3: Cooling tower 3a: Wall part 7: Cooling room 7a: Gas supply port (gas supply part) 13: Small flue 13c ₁ : Upper flue 13c ₂ : Lower flue 100: Partition member 200: Pressure Detection unit 200a: Lower detection unit 200b: Upper detection unit 200c: Differential pressure derivation unit 202: Control unit

Claims (5)

A cooling tower with a cooling chamber surrounded by walls,
A gas supply unit provided in the cooling tower and supplying gas to the cooling chamber,
Of the wall portion of the cooling tower, a small flue formed above the gas supply portion in the vertical direction and opened to the cooling chamber, and a small flue.
A partition member provided in the small flue and partitioning the small flue into a plurality of flues in the vertical direction.
At least, a pressure detection unit that detects the pressure of the lowest flue located at the lowermost position in the vertical direction among the plurality of flues.
Coke dry fire extinguishing equipment equipped with. The pressure detector is
The lower detection unit that detects the pressure of the lowermost flue and
An upper detection unit that detects pressure above the lower detection unit in the vertical direction, and an upper detection unit.
A differential pressure derivation unit that derives a differential pressure between the pressure detected by the lower detection unit and the pressure detected by the upper detection unit, and
The coke dry fire extinguishing system according to claim 1. The coke dry fire extinguishing system according to claim 2, wherein the upper detection unit detects a pressure above the upper end of the partition member in the vertical direction. The coke-dry fire extinguishing system according to claim 2 or 3, further comprising a control unit that gives a predetermined notification when the differential pressure derived by the differential pressure derivation unit exceeds a preset threshold value. The coke dry fire extinguishing system according to any one of claims 1 to 4, wherein the pressure detecting unit is provided in a plurality of different small flues.

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