JPH10176169A - Apparatus for spraying surface protectant over refractory brick of coking chamber of coke oven - Google Patents

Abstract

PROBLEM TO BE SOLVED: To spray a surface protectant over the refractory brick of a coking chamber with a simple apparatus and to thereby inhibit carbon deposition inexpensively. SOLUTION: An elevating rack 10 is moved vertically along the gate-type guide post 9 arranged on the working deck 7 provided on a coke pusher 4 transversely traveling on the coke pushing side of a coking chamber 1, and a self-running carriage 16 is moved forward and backward along the guide rail 15 horizontally disposed on the rack 19. By the combination of the vertical and horizontal movements of the surface protectant spray lance 18 mounted on the carriage 16, the surface protectant can be sprayed in good workability onto the side wall surface of the chamber 1 with a simple apparatus from a spray nozzle open to the horizontal direction of the external periphery of the tip.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-temperature refractory which constitutes a coking chamber for preventing the coke from being clogged and stopped by the growth of carbon adhering to a coking chamber refractory brick disposed in a coke oven. The present invention relates to a device for spraying a surface protective material on a brick.

[0002]

2. Description of the Related Art Silica-based refractory bricks are generally used as refractory bricks in a carbonization chamber disposed in a coke oven. A siliceous refractory brick is manufactured by crushing a siliceous raw material, mixing with water, drying in a mold, and firing at about 1200 ° C. The furnace is built using the siliceous refractory brick manufactured in this way, dried at a uniform temperature, and after removing the stress, it is used as a refractory brick in a coke oven.

[0003] The refractory brick has a high particle density for the purpose of enhancing heat insulation, and is formed by interparticle contact. Therefore, the surface of the brick wall, which was smooth in the early stage of the furnace construction, may lose its smoothness due to peeling and cracking due to friction with the coal or coke to be charged and frequent heating and cooling. In addition to the increased roughness and increased frictional resistance, the roughened surface promotes the adhesion of treated coal and carbon and ash generated by combustion, causing a problem in the operation of a coke oven.

[0004] A coke oven has a structure in which a large number of carbonization chambers for carbonizing coal into coke and combustion chambers for burning fuel gas are alternately arranged. As described above, the carbonization chamber and the combustion chamber are separated from each other by the partition wall composed of the siliceous refractory brick. In addition, the height of the carbonization room is about 6-7m, depth 15-16
m, a rectangular cavity having a width of 40 to 50 cm. The width is slightly wider on the coke discharge side, that is, on the anti-coke extrusion side, in order to make it easier to push coke out of the furnace.

[0005] The blended coal, which is a raw material, is intermittently supplied by a coal-charging vehicle from a charging port arranged on the ceiling wall of the coking chamber.
After adjusting to a uniform height with a leveler attached to the extruder arranged on the coke extrusion side, it is heated and carbonized. After the carbonization, both furnace lids are opened, extruded and guided to the outside of the furnace by a coke guide truck located on the anti-coke extrusion side of the coking chamber, and extruded out of the furnace. Becomes

[0006] As described above, if the wall of the carbonization chamber made of refractory brick loses its smoothness, carbon in the blended coal generated in the process of coking adheres to the surface to form a more uneven surface, and the carbon of the carbon is reduced. There is a problem that the width of the carbonization chamber is narrowed due to the sticking, the extrusion resistance of coke is increased, and the load on the extruder increases. Although carbon baking is performed to avoid this problem, a portion called a joint, which fills a gap between bricks, is damaged, and raw gas may flow into the combustion chamber from the carbonization chamber side.

In order to prevent carbon from adhering to the refractory brick in the carbonization chamber, Japanese Patent Application Laid-Open No. Sho 59-174585 discloses a means for applying a surface protective material to the refractory brick and heat treating the same.
Japanese Patent Application Laid-Open Publication No. H11-139,055 discloses means for using a firebrick coated with a surface protective material at a base stage. Further, the present applicant has proposed a high-temperature refractory material having a high silica purity of a specific component and capable of forming a high-strength smooth surface layer in Japanese Patent Application Laid-Open No. H8-11977. This high-temperature refractory material is obtained by dissolving sodium silicate, sodium borate, and an organic silicone compound in water.
Spray nozzle is applied to the refractory brick wall of the high temperature carbonization room of ~ 1200 ° C using a spray nozzle, and then the temperature is raised. Form a surface layer.

[0008]

As described above, by applying or spraying a surface protective material on a refractory brick in a carbonization chamber, it has become possible to considerably prevent carbon from adhering. However, since the refractory brick in the coking chamber is at a high temperature, there is no sufficient spraying device suitable for reliably spraying the surface protective material on the refractory brick in the coking room, and development of a spraying device has been demanded. The present applicant has previously proposed Japanese Patent Application No. 7-286180 as a spraying device capable of stably applying a surface protective material to a refractory brick in a carbonization chamber of a coke oven, and has achieved results.

The spraying device is provided on the coke extrusion side of the coking chamber, and is provided with a moving carriage that moves forward and backward from outside the furnace in the longitudinal direction of the coking chamber. A horizontal lance provided at a lower portion of the horizontal lance so as to be able to advance and retreat horizontally from one end to the other end in a longitudinal direction, an upright lance erected in the height direction of the carbonization chamber at an end of the horizontal lance, And a spray nozzle for refractory material application, which is arranged in multiple stages so as to face the wall surface of the carbonization chamber along the height direction of the refractory material.

[0010] However, this spraying device for a surface protective material is a water-cooled structure for moving the entire frame including a long movable truck provided with a spray nozzle for refractory spraying into and out of a carbonization chamber. There has been a problem that the equipment cost increases and the cost increases. An object of the present invention is to provide an apparatus for spraying a surface protective material onto a coke oven refractory brick of a coke oven, which can reliably spray a surface protective agent on a refractory brick in a coke oven by a relatively simple surface material spraying device. It is intended for.

[0011]

According to a first aspect of the present invention, there is provided an apparatus for spraying a surface protective material on a refractory brick forming a carbonization chamber arranged in a coke oven. A pair of portal guide posts, spaced apart in the coke extrusion direction via a frame provided on the working deck of the coke extruder that traverses the coke extrusion side of the coking chamber, form the portal guide posts. A vertically movable gap vertically movable by driving a vertical drive device, a pair of horizontal guide rails disposed on the vertical frame in the coke pushing direction, and a pair of horizontal guide rails It has a self-propelled truck that can move forward and backward by a traveling drive device, and a spray nozzle that opens horizontally at the outer periphery of the tip end. A blowing device for surface protective material to carbonization chamber refractory brick in coke oven, characterized by comprising a lance sprayed surface protecting material of the cooling structure for the forward-reverse in a horizontal state facing.

[0012] According to a second aspect of the present invention, the lifting device includes a plurality of winches installed on a work deck;
2. The spraying of a surface protective material on a refractory brick in a coke oven in a coke oven according to claim 1, wherein the wire wound around the winch comprises a wire sheave disposed corresponding to an upper end of a frame. Device. According to a third aspect of the present invention, in the coke oven according to the first aspect of the present invention, the surface protective material spraying lance is reinforced by a reinforcing frame provided along a lower portion in a longitudinal direction. This is a device for spraying the surface protection material onto the surface.

According to a fourth aspect of the present invention, there is provided a support wherein the surface protection material spraying lance or the reinforcing frame provided along a lower portion in the length direction of the surface protection material spraying lance is disposed at a tip end of the lift base. The apparatus for spraying a surface protective material on a refractory brick in a coke oven in a coke oven according to claim 1 or 3, wherein the apparatus is supported by rollers.

According to a fifth aspect of the present invention, a sub-lance having an upward spray nozzle at a tip portion for spraying a surface protective material to a ceiling wall and a charging inlet of the carbonization chamber is provided above the surface protective material spraying lance. The apparatus for spraying a surface protective material on a refractory brick in a coke oven in a coke oven according to claim 1, wherein the refractory brick is attached. According to a sixth aspect of the present invention, there is provided a working device provided with a spraying apparatus for a surface protective material having the same structure as the spraying apparatus for a surface protective material according to the first aspect, provided by a coke guide wheel traversing the coke extruding side of the carbonization chamber. This is a device for spraying a surface protective material on a refractory brick in a coke oven in a coke oven, which is also provided on a deck.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG.
This will be described with reference to FIG. As shown in FIG. 1, a coking oven 1 of a coke oven is provided with a plurality of (only one of them is shown in the drawing) charging ports 2 in its longitudinal direction. The coke produced in the coking chamber 1 is supplied to an extrusion ram 5 provided in a coke extruder 4 traversing the coke extrusion side.
The ram head 6 is advanced from one end to the other end of the coking chamber 1 and is guided by a coke guide wheel (not shown) arranged on the anti-coke pushing side of the coking chamber 1 and is pushed out of the furnace. The surface protection material spraying device 3 for spraying the surface protection material on the refractory brick forming the carbonization chamber 1 uses the space of the work deck 7 near the extrusion ram 5 provided in the coke extruder 4 traversing the coke extrusion side. And install it. This is convenient from the operation procedure because the surface protection material spraying device 3 can be operated after extruding coke from the carbonization chamber 1 using the coke extruder 4.

In order to install the surface protection material spraying device 3 on the work deck 7, the support 8A and the beam 8B are provided on the work deck 7.
A frame frame 8 is provided, and two portal guide posts 9 reaching the beams 8B from the work deck 7 are erected on the frame 8 at a distance in the coke extrusion direction. FIG.
As shown in the figure, a long elevating rack 10 is arranged to be vertically movable within a vertical gap formed by each portal guide post 9 while maintaining a horizontal state. This lifting platform 10
The winding motor 11 installed on the work deck 7
Wires 13 wound around two winches 12 driven to rotate are connected via sheaves 14 arranged correspondingly on beams 8B of the frame 8. The device for raising and lowering the lifting base 10 is not limited to the above-described one, and may be a rack and pinion lifting mechanism, a hydraulic cylinder lifting mechanism, or a rotationally driven endless chain lifting mechanism disposed on the portal guide post 9. It can be raised and lowered by applying a well-known lifting device.

A pair of guide rails 15 are arranged on the elevating gantry 10 in the coke pushing direction. As shown in FIG.
16 is driven forward and backward via the wheels 17 by the drive of the drive device 22. The self-propelled carriage 16 is mounted with a water-cooling structure spraying lance 18 in a horizontal state. In order to improve the support strength, the surface protection material spraying lance 18 is provided with a reinforcement frame 19 at its lower part to support it, and a support roller 23 is arranged at the tip of the elevating gantry 10 to move the reinforcement frame 19 horizontally. It is preferable to support as much as possible.

As shown in FIG. 1, the rear end of the surface protection material spraying lance 18 which moves forward and backward by the traveling of the self-propelled carriage 16 has a common cable carrier which expands and contracts following the forward and backward movement.
Tank for surface protection material placed on the lifting platform 10 via 20
Connected to 21. The common cable bear 20 is used in common with a water supply / drainage hose for supplying and discharging the cooling water to and from the surface protection material spraying lance 18 and a power supply cable.

As shown in FIGS. 4 and 5, the surface protection material spraying lance 18 has a triple pipe structure in which the tip composed of an inner pipe 24, an outer pipe 25 and an intermediate partition pipe 26 is closed by a tip plate 28. When the surface protective material spraying lance 18 is held in a horizontal state, the spraying nozzle 27 penetrating the outer circumference of the inner pipe 24, the partition pipe 26, and the outer pipe 25 has a plurality of steps in the length direction so as to open in the horizontal direction. (Four stages in the drawing). The end of the partition tube 26 is open between the inner tube 24 and the outer tube 25, and the space between the inner tube 24 and the partition tube 26 is on the inlet side of the cooling water, and the outer tube 25 and the partition tube 26 are connected to each other. During this time, the cooling water is discharged, and the cooling water is supplied to cool the surface protection material spraying lance 18 with water. In some cases, the surface protection material spraying lance 18 may be air-cooled.

Next, the usage of the surface protection material spraying device 3 of the present invention will be described. When the carbonization of the coal in the coking chamber 1 is completed, the furnace lids set at both ends of the coking chamber 1 are removed, and the produced coke is moved from one end of the coking chamber 1 to the ram head 6 provided in the coke extruder 4. Coke guide vehicle (not shown) by moving forward to the other end
Through the furnace. Then, after the ram head 6 was pulled out of the furnace, the coke extruder 4 was traversed on the track 29 via the wheels 30, and the surface protection material spraying lance 18 provided in the surface protection material spraying device 3 was emptied of the hot lance 18. The position is aligned with the center of the carbonization chamber 1 in the width direction in the state, and the surface protection material spraying lance 18 is brought into a water-cooled state. The surface protection material tank 21 has a surface protection material (for example, Al ₂ O ₃ :
34wt%, SiO _2: 56 bound form mainly composed of wt% is kept stored using) a fluid-like surface protective material of the cement bond.

The take-up motor 11 is driven to rotate the two winches 12 in synchronization with each other to take up the wire 13 and to move the winch 12 up and down.
The surface protection material spraying lance 18
Is raised to a height corresponding to the upper part of the carbonization chamber 1. The self-propelled trolley 16 is driven by the driving device 22 so that
The lance 18 is advanced along 15 and the tip of the surface protection material spraying lance 18 faces the upper entrance of the carbonization chamber 1. At this stage, pressurized air is supplied to the surface protection material tank 21 to increase the pressure, and the surface protection material stored in the surface protection material tank 21 is sprayed through the surface protection material supply cable conveyor 20 to the lance.
Supply 18 The surface protection material supplied to the surface protection material spraying lance 18 is supplied to the side of the refractory brick forming the carbonization chamber 1 from the spray nozzles 27 arranged in multiple stages in the horizontal direction on the outer periphery of the distal end portion via the inner pipe. The spraying is started toward the wall surface 31.

In this manner, the surface protective material spraying lance
Start spraying surface protection material from 18
By combining the forward and backward movement 16 and the winding and rewinding of the winch 12 by the winding motor 11,
The surface protection material spraying lance 18 is moved in the length direction and the height direction of the carbonization chamber 1, and a predetermined amount of the surface protection material is applied to the entire side wall surface 31 from one end to the other end of the carbonization chamber 1 or to a necessary portion. Spraying.

The surface coating material layer coated on the side wall surface 31 forming the carbonization chamber 1 not only prevents carbon generated during carbonization of the coal in the carbonization chamber 1 from adhering to the side wall surface 31. In addition, it is possible to reduce peeling, cracking, and damage to joints that occur on the side wall surface 31. As a result, it is possible to prevent clogging when coke is extruded from the carbonization chamber 1 due to the adhered matter such as carbon and ash attached to the siliceous refractory brick forming the carbonization chamber 1.

Further, in order to spray the surface protective material on the ceiling wall 34 and the charging port 2 of the carbonization chamber 1, the sub-lance 32 of the cooling structure is arranged in parallel along the upper side of the surface protective material spraying lance 18 as shown in FIG. It is preferable to dispose the spray nozzle 33 upwardly on the outer periphery of the tip of the sub-lance 32. In this case, the sub-lance 32 can be supplied or stopped independently of the surface protection material, and the sub-lance 32 disposed on the surface protection material spraying lance 18 is attached to the ceiling wall of the carbonization chamber 1.
It is possible to supply surface protection material only when it is located in the vicinity of 34 and to spray the spray from the spray nozzle 33 to the ceiling wall 34 and the inlet 2, and to stop the supply alone when it separates downward from the ceiling wall 34. I do.

In the above description, the surface protective material spraying device 3 is arranged on the working deck 7 of the coke extruder 4 with the surface protective material spraying lance 18 having a length extending from one end of the carbonization chamber 1 to the other end. However, the length of the surface protection material spraying lance 18 disposed on the work deck 7 of the coke extruder 4 is set to reach the horizontal center of the carbonization chamber 1. Instead, a surface protection material spraying device 3 of the same structure is arranged on a work deck of a coke guide truck arranged on the opposite side of the coke extruder 4 in the carbonization chamber 1, and the surface protection material spraying device 3 is carbonized. It is also possible to arrange a surface protection material spraying lance having a length reaching the horizontal center of the chamber 1. In this case, since the length of each surface protection material spraying lance 18 can be halved, the lance bending due to exposure to high temperature can be reduced.

[0026]

As described above, according to the present invention, a pair of portals spaced apart in the coke extrusion direction on a work deck provided on a coke extruder traversing the coke extrusion side of the carbonization chamber. The vertical gap formed by the guide posts is moved up and down by driving the lifting drive device to raise and lower the self-propelled trolley on the lifting gantry, and along a pair of guide rails arranged horizontally on the lifting gantry. The self-propelled trolley is moved back and forth toward the length of the carbonization chamber.

[0027] With this, the combination of the lifting and lowering of the surface protection material spraying lance mounted on the self-propelled carriage and the forward / backward movement enables
The surface protection material can be sprayed onto the side wall surface of the carbonization chamber with good workability from the spray nozzle that opens in the horizontal direction on the outer periphery of the distal end portion. As a result, the adhesion of carbon to the refractory brick in the carbonization chamber is reduced, and it is possible to prevent the coke from being clogged or stopped due to the growth of the attached carbon, thereby improving the operation rate of the coke oven.

Only the surface protection material spraying lance is required to have the cooling structure as the surface protection material spraying device. Therefore, the range of the device having the cooling structure can be reduced, and the equipment cost and operation of the surface protection material spraying device can be reduced. Cost savings are achieved.

[Brief description of the drawings]

FIG. 1 is a side view showing a surface protection material spraying device of the present invention.

FIG. 2 is an enlarged sectional view showing the direction of arrow AA in FIG.

FIG. 3 is a partially enlarged side view of the surface protection material spraying device of the present invention.

FIG. 4 is a plan view showing a distal end portion of the surface protection material spraying lance of the present invention.

FIG. 5 is a sectional view showing the direction of arrow AA in FIG. 4;

FIG. 6 is a front view showing a surface protective material spraying lance having the sub-lance of the present invention.

[Explanation of symbols]

 DESCRIPTION OF REFERENCE NUMERALS 1 carbonization chamber 2 loading port 3 surface protection material spraying device 4 coke extruder 5 extrusion ram 6 ram head 7 work deck 8 frame frame 9 portal guide post 10 elevating pedestal 11 winding motor 12 winch 13 wire 14 sheave 15 guide rail 16 Self-propelled truck 17, 30 Wheel 18 Surface protection material spraying lance 19 Reinforcement frame 20 Shared cable carrier 21 Surface protection material tank 22 Drive unit 23 Support roller 24 Inner tube 25 Outer tube 26 Partition tube 27, 33 Spray nozzle 28 Tip plate 29 Track 31 Side wall 32 Sub lance 34 Ceiling wall

Claims (6)

[Claims] An apparatus for spraying a surface protective material on a refractory brick forming a coking chamber arranged in a coke oven, provided on a working deck of a coke extruder traversing a coke extrusion side of the coking chamber. A pair of portal guide posts spaced apart in the coke extrusion direction via a frame frame, and a vertical gap formed by the portal guide posts are provided to be vertically movable by driving a lifting drive device. An elevating platform, a pair of horizontal guide rails disposed on the elevating platform in the coke pushing direction, a self-propelled vehicle capable of moving forward and backward between the pair of horizontal guide rails by a traveling drive device, Surface spraying lance of a cooling structure which is mounted on the self-propelled vehicle and moves forward and backward in the horizontal direction toward the length direction of the carbonization chamber. An apparatus for spraying a surface protective material on a refractory brick in a coke oven in a coke oven. 2. The lifting drive device comprises: a plurality of winches installed on a work deck; and a wire sheave in which a wire wound around the winch is arranged corresponding to an upper end of a frame. The apparatus for spraying a surface protective material on a refractory brick in a coke oven in a coke oven according to claim 1, characterized in that: 3. The surface protection of a coke oven refractory brick in a coke oven according to claim 1, wherein said surface protection material spraying lance is reinforced by a reinforcing frame provided along a lower part in a length direction. A material spraying device. 4. A lance for spraying the surface protection material or a reinforcing frame provided along a lower portion in a longitudinal direction of the lance for spraying the surface protection material, the support frame being supported by a support roller disposed at a tip end of the elevating rack. The apparatus for spraying a surface protective material on a refractory brick in a coke oven in a coke oven according to claim 1 or 3. 5. A sub-lance having an upwardly directed spray nozzle for spraying a surface protective material on a ceiling wall and a charging port of a carbonization chamber at an end thereof is mounted in parallel with the surface protective material spraying lance. An apparatus for spraying a surface protective material to a refractory brick in a coking oven in a coke oven according to claim 1. 6. A spraying device for a surface protective material having the same structure as the spraying device for a surface protective material according to claim 1 is also mounted on a work deck provided with a coke guide wheel that traverses the coke extruding side of the carbonization chamber. An apparatus for spraying a surface protection material on a refractory brick in a coke oven in a coke oven.