KR100290309B1 - Lance device for spray repairing furnace wall - Google Patents

Abstract

PURPOSE: A lance device is provided which accurately sets the projection position of refractory powder for a target in repairing refractory materials by projecting the refractory powder onto the furnace wall, and which is applied to partial repairing of the furnace wall of a degassing furnace in which projection conditions of the refractory powder is inferior. CONSTITUTION: The lance device for spray repairing furnace wall comprises a driving shaft on a driven shaft, wherein the driving shaft is consisted of individual shaft coupling members, and which transfers refractory powder by combining plural of the shaft coupling members as a whole; a casing enclosing the driving shaft so as to form a channel; a powder transfer pipe(13) which is guided to the driving shaft so as to transfer the refractory powder; a nozzle driving part equipped with a first rotation part which transmits power by connecting an outer power transmission gear to one end of the driving shaft, and a second bended rotation part which controls an angle of nozzle direction at an original position by power obtained from the first rotation part; a lance rotation part which is coupled to the outer power transmission gear so as to guide axial rotation of the nozzle by independently rotating the driving shaft separately from the powder transfer pipe(13); a distribution element(18) which is mounted on the outer wall of the driving shaft so as to divide and supply cooling water and combustible gas along the driving shaft; and a rotary joint which joints the concerned tangential surface of the coupling part of the distribution element(18) and the nozzle for constantly maintaining flow of fluids which are divided and supplied from the distribution element(18) regardless of rotation of the driving shaft and the nozzle.

Description

Spray repair lance device of the furnace wall

The present invention relates to a lance apparatus for hot repair in the event of damage to the lining of a refractory lining of a furnace.

In the extraction and refining of metals, the blast furnace in the smelting process, which is distinguished from ore from gangue, and any impurities present in the molten iron are selectively oxidized and removed from the molten metal to convert the pig iron obtained from the blast furnace into steel. The converter in the steelmaking process, another degassing furnace (RH) in the steelmaking process to remove impurities in the molten metals transferred from the converter, and tofeidoka, ladle, tundish, etc., which transfer the molten metal in each process In order to withstand the conditions subject to high heat, the refractory is commonly lined on the inner wall to maintain heat resistance at high temperature conditions.

Refractory construction methods for various furnaces are divided into masonry and inflow construction. Refractory surface treatment is applied by spray growth, spraying, and thermite. Depending on the cold type and hot type.

The refractory material (6) constructed in the furnace and lining material for the purpose of surface treatment become thinner due to heat as the furnace operation proceeds, or the function of the refractory material decreases, causing local refractory of the refractory material and abrasion damage. It develops due to cracks or gas leaks in (7). When these signs are detected, only the locally damaged refractory (6) is repaired to the extent that the life of the furnace is allowed to maintain the operating conditions of the furnace.

In the above-mentioned refractory repair method, the cold method stops the blast furnace operation, cools the furnace body at a high temperature, checks the damaged part by entering the furnace, repairs the part, and raises the furnace temperature to the normal level again. It is to resume operation. It is therefore an underdeveloped maintenance method with a large loss in work and low energy efficient operation.

The hot method was provided as an alternative repair method that eliminates the exhaustive factors of the cold method by eliminating most of the complicated pre and post treatment processes, such as the interruption, cooling, and reheating of the furnace operation, which are the preliminary stages. In other words, it is possible to directly repair the furnace in a high temperature state to provide a means to reduce the energy consumption required for the thermal management of the furnace and to reduce the loss in the operation process.

However, in realizing the hot repair, the demand and necessity of the device to replace the manpower has increased so that the factors affecting the workability and repair performance are determined by the device, and according to the functional matters of the device, The efficiency of maintenance work has been defined, making the device relatively important.

The apparatus applied to the hot repair is basically a refractory conveying device (lance = lance) that can adapt to the environment in the furnace, a conveying device for supplying quantitatively refractory to the conveying device side, and in particular means for moving the conveying device And a cooling device to perform a given task when the pressure feeding device is located in the furnace.

According to the refractory powder conveying characteristics in the pressure feeding device is divided into a spray growth type and a spray type to define a cold / hot repair device. In the case of the spray growth repair apparatus, water and refractory powder particles are sprayed around the target area in the furnace by pneumatic pressure through a lance to form the refractory by the furnace wall temperature.

In the case of thermal spraying equipment, combustible gas + refractory is separately supplied through the lance, but when they are joined in the furnace, they are reacted with the refractory in a high temperature state in the state where the refractory particles are heated by the flame composition to obtain a strong result of frosting. Suitable for precise partial repair of refractory materials, the device remains in development due to restrictions on transportation of refractory materials and maintenance of heat resistance.

As such, the hot repair device may be further subdivided into a spray growth repair device or a thermal spray repair device according to the transportation of the refractory powder. The spray growth repair device may be a spray gun for repairing fire-resistant interior materials according to Korean Patent Publication No. 83-121. ″ Hot repair device of blast furnace wall ″ of Utility Model Publication No. 86-1371, ″ Hot repair device of blast furnace wall of Korean Utility Model Publication No. 86-709 ″ and ″ of domestic utility model publication No. 90-2763 Spray device for hot repair of furnace large waterway, repair device spraying from hot of fireproof wall of domestic utility model publication No. 91-9505, and vacuum escape of Korean Patent Application Publication No. 97-56522 Hot repair apparatus and method of gas immersion tube. The various techniques of these spray growth repair systems have been provided by how to make the refractory powders as effective as possible in the furnace refractory.

However, there is a disadvantage that the operating area of the lance for spraying refractory powder to the repair target location is limited or the material required for thermal spray repair is not suitable for thermal spray repair.

In this regard, the thermal spray repair apparatus is described by the contents described in the Korean Patent Publication No. 96-16163, "Fireproof Body Repair Method and Fireproof Body Repair Device". This technique involves the risk of manipulation of finely oxidized particles such as silicon or aluminum particles, which are commonly used as solid fuel components of ceramic welding or dressing powders (the effects of local heating or electrical discharges due to friction in the supply line). As a result, it is possible to maintain the thermal spraying in the furnace by avoiding the possibility of premature combustion or explosion), i.e. by supplying refractory powder and burning combustible particles contained in an oxygen-rich carrier gas onto the refractory body. In the reaction zone adjacent to the refractory, the combustible particles were oxidized, thereby producing the heat required to dress the refractory or to form a refractory weld material on the refractory.

The technical conditions must be met to actually apply the benefits of thermal spraying to the hot repair of the furnace. For example, the cold spray repair of the furnace can improve the repair reliability of the refractory material compared to the spray growth repair by a relatively simple reconstruction of the spray equipment, but it is difficult to realize the thermal spray repair of the furnace in the hot. Among them, the amount of gas and flammable gas, including the quantitative supply of refractory materials, and the construction of a lance that can effectively access the area to be repaired are one of the difficult constraints.

The size and format of the lance is determined by the various types of furnace. In particular, the lance structure, which is applied in the hot repair method, generally includes a cooling means to have both durability and heat resistance to resist heat deformation.

Figure 1 is a schematic diagram of the degassing furnace (1) applied in the steelmaking process, the lower symmetrical gas circulation passage (2) which is separated from the blast furnace and the converter of the closed form and also other ladles and tundish (2) ) Will be placed in a protruding form at the bottom. Such a degassing furnace (1) forms a vacuum in the furnace, and in the process of circulating the molten metal contained in the ladle (3) through the circulation passage (2) (2a) to extract the air bubbles and gas in the molten metal by vacuum to the gas in the molten metal It is used for the purpose of removing the, so the degassing furnace (1) the most affected by the high temperature heat is the inner and outer peripheral wall surface of the circulation passage (2) (2a) corresponding to the deposition. In hot repair of various furnaces, the hot repair of a furnace having an open top portion is an easy method of spraying refractory to a corresponding area by accessing a lance 4 to a repair target as shown in FIG. 2. However, in the case where the upper portion is closed with the circulation passages (2) and (2a) like the degassing furnace (1), the upper part is impossible to repair. If refractory damage occurs at any point on the deep inner wall, it is difficult to repair itself, which allows the refractory to be sprayed correctly into the area by inserting a lance.

FIG. 2 is an example of the easiest hot repair to put the lance 4 in the furnace 5 with the top open to project the refractory to the damaged site, and the refractory pressure lance 4 applied thereto is simply a refractory material. It is designed by how the lance moves to reach the inner wall target of the furnace, and it is equipped with a simple cooling and conveying line.

On the other hand, in the hot repair of the degassing furnace (1), there are some difficulties in applying general repair methods, one of which is how to approach the lance to the refractory, and the other is the thermal spray used to increase the reliability of the refractory repair. Will not apply.

This technique of approaching a refractory body to a refractory to a refractory has been commonly carried out through a lance, but it has been difficult to precisely control the lance, thereby limiting the refractory to the refractory to a furnace wall requiring more sophisticated projection conditions. Along with the question of how to maintain the flow of the refractory body through the lance and the flow of the gas, which is required for the realization, the problem of how to deform the heat deformation factor of the lance in the hot repair was a problem.

SUMMARY OF THE INVENTION The present invention provides a lance apparatus that can precisely set the projection position selection of a refractory body relative to a target in repairing the refractory body by projecting the refractory body on the furnace wall.

The present invention also provides a lance apparatus adapted to partial repair of a furnace wall, such as a degassing furnace, in which the projection condition of the fireproof body is relatively poor.

In another aspect, the present invention is to stabilize the flow of the refractory body and gas through the fluid transfer passage of the lance to enable thermal spray repair of the refractory.

A feature of the present invention includes a rotating device for rotatably coupling the upper and lower slide frames and the lance, the gas supporting the lance for injecting a refractory body to the inner wall or the outer wall along the slide frame, the lance is refractory powder In a furnace wall hot repair lance having a nozzle having a tip and having a flow passage for circulating coolant around the transfer pipe, the tip being made of a single shaft joint material, and as a whole A drive shaft for conveying refractory powder by combining a plurality of shaft joint materials, a casing for opening a flow path surrounding the drive shaft, a powder conveying pipe guided to the drive shaft for conveying refractory powder, and an external power transmission device at one end of the drive shaft. Obtained from the first rotating unit and the first rotating unit for transmitting power by coupling A nozzle driving unit having a refracted second rotating unit which adjusts the nozzle direction angle by the oscillating power in its original position, and coupled with an external power transmission unit to induce an axial rotation of the nozzle by rotating the drive shaft independently of the powder conveying pipe. A lance rotating unit, a distribution station mounted on the outer wall of the drive shaft for supplying the cooling water and the flammable gas along the driving shaft, and a flow of fluid separately supplied from the distribution station are fixed regardless of the rotation of the driving shaft and the nozzle. In order to keep it in place, the joint of the distribution point and the nozzle is in the thermal spray lance device of the furnace wall which consists of the rotary joint.

1 is a cross-sectional view of the application example to the degassing in the steelmaking process

Figure 2 is a schematic diagram of a conventional furnace wall hot repair lance device

Figure 3 is a longitudinal cross-sectional view of the thermal spray repair lance device according to the invention

FIG. 4 is a sectional view of the main portion of the nozzle driving unit, showing the detail of the portion ″ A ″ of FIG.

Figure 5 shows a rotating housing applied to the present invention (a) is a plan view (b) is a cross-sectional view (b) is a cross-sectional view B-B line of (b)

Figure 6 shows a rotating shaft applied to the present invention (a) is a plan view (b) is a bottom view

Figure 7 shows a casing according to the present invention (a) is a plan view (b) is a cross-sectional view taken along line C-C

8 is a schematic diagram of a power transmission system of a lance device according to the present invention;

Figure 9 shows the position of the nozzle for the inner wall thermal spray repair by degassing according to the present invention (A) Example of the submerged tube and furnace inner wall partial repair (B) Example of the upper part of the submerged tube (C) A diagram showing the position of the nozzles in the maintenance condition of the upper side of the pipe and the upper side of the furnace.

* Description of the symbols for the main parts of the drawings *

10: Lance lifting slide frame 11: Lance

12: rotating device 13: powder conveying pipe

14: first rotating part 15: second rotating part

16: Nozzle 17: All lances

18: Distribution 19: Main shaft

20: Rotating housing 21: First rotating shaft

22: joint shaft 23: second rotation shaft

24: main casing 25: sub casing

26: head casing 27: water pipe

28: oxygen supply path 29: flammable gas supply path (LPG)

31.32.34.35.36.37: Bevel Gear 33.38: Servo Motor

39: Reducer 40: Flange

An up and down slide frame 10 for guiding the up and down movement of the lance and a rotating device 12 for rotatably coupling the lance 11 are added. It has a gas for supporting the lance (11) to be injected, and the lance (11) has a conveying conduit for sending the refractory powder with the combustible gas, and another flow path for circulating the cooling water around the conveying conduit, the tip is a nozzle In the furnace wall hot repair lance device made of, the present invention is composed of a single shaft joint material as shown in Figure 3, as a whole, the drive shaft on the longitudinal axis for conveying the refractory powder by combining a plurality of the shaft joint material, and surrounds the drive shaft A casing for establishing a flow path, a powder conveying pipe 13 for guiding the drive shaft to convey the refractory powder, and an external power transmission device at one end of the drive shaft. A nozzle driving unit having a first rotating unit 14 coupled to transmit power and a second rotating unit 15 refracted to adjust the nozzle direction angle by the power obtained from the first rotating unit 14, and the drive shaft Is rotated independently of the powder transfer pipe 13 to branch the lance rotating unit 17 coupled with an external power transmission device to induce axial rotation of the nozzle 16, and branching the coolant and the combustible gas along the driving shaft. Dispensing station 18 mounted on the outer wall of the drive shaft for supply, and distribution to maintain a constant flow of fluid supplied from the distribution station 18 irrespective of rotation of the drive shaft and nozzle 16 And a tangential surface of the engaging portion of the nozzle as a rotary joint.

The drive shaft is coupled to the main shaft 19 is fixed to the base, and the main shaft 19 and the first rotating shaft 21 and the distribution station 18 and the rotating housing 20 is mounted At least one joint shaft 22, which is combined with the first rotating shaft 21 to guide the powder transfer pipe 13 and guides rotation, and is coupled to the front end of the joint shaft 22 to couple the nozzle 16. It consists of a second rotating shaft 23 is refracted downward to guide and expand the area of rotation of the nozzle (16).

The casing is divided into a main casing (24), a sub casing (25), and a head casing (26) to guide the interaxial coupling with respect to the drive shaft. The casings (27) carrying the cooling water and the gas carrying the combustible gas are respectively. The supply passage 29 and the oxygen supply passage 28 are separately opened.

The nozzle driving unit includes a bevel gear 31 mounted on the main shaft 19 of the lower side of the powder conveying pipe 13 in which the first rotating unit 14 is arranged in the longitudinal axis direction by the support plate 30 and the plurality of supporting members. A driven side, a motive side for transmitting power by engaging the bevel gear 32 at a position orthogonal to the bevel gear 31, and a servo motor 33 for transmitting power to the bevel gear 32; The second rotating unit 15 is equipped with a bevel gear 34 in the axial direction at the tip of the joint shaft 22 to mediate the power generated from the first rotating unit 14, and the bevel gear 34 and The meandering bevel gear 35 is mounted on the second rotating shaft 23 to meander the nozzle 16 in order to transmit the rotational force transmitted in the meandering direction to the nozzle 16 in accordance with the joint shaft 22 deflection angle. It is configured to drive along the axis.

The lance rotating unit 17 mounts the bevel gear 36 to the first rotating shaft 21 to form the driven side, and moves the bevel gear 37 at a position orthogonal to the driven side bevel gear 36. And a driving side that transfers power to the thermomotor 38, and joints the main casing 24 and the sub casing 25 and the head casing 26 with respect to the first rotating shaft 21. The servo motor 38 on the driving side is interlocked with the rotational force to configure the driving force to participate in the rotation of the nozzle.

The present invention provides a drive unit for driving nozzles and lances separately, an apparatus unit for carrying out refractory material transfer and supply of cooling water and flammable gas (LPG) + oxygen, etc. in the nozzle and lance driving stages, and a wider maintenance area in the furnace. In order to ensure that the dynamic trajectory of the drive section is made.

In FIG. 3, when the servomotor 33 is driven, the rotation of the motor 33 is converted to a low speed through the reducer 39 to rotate the driving side formed of the motor shaft-bevel gear 30, and this rotational force is again beveled. The main shaft 19 which is transmitted to the powder transfer pipe 13 through the gear 31 and surrounds the powder transfer pipe 13 is rotated. There are a number of bearing support shafts in the periphery and the support portion for supporting the powder transfer pipe 13 on the longitudinal axis to assist when the main shaft 19 rotates, and the powder transfer pipe 13 to the main shaft 19 ) And the drive shaft guiding through the joint shaft 22 is composed of a plurality of nodes, but moves the rotational force transmitted through the various coupling coupling to the upper side of the second rotating part 15 side. The bevel gear 34 is mounted on the joint shaft 22 at the upper side, as shown in FIG. 4, and the rotational force transmitted from the lower first rotating part 14 is an inflection point for transmitting the rotational force to the counterpart bevel gear 35 again. The pivot point is a joint shaft 22 and the second rotation tape with the meandering engagement of the bevel gears 34 and 35 and the center line meandering downward from the longitudinal axis and inclined approximately 45 degrees to the reference point. Combining the ting shaft 23 eventually gives a parallel to the head casing 26 to convert the longitudinal axis rotation to the meandering rotation. At this time, the bevel gear 35 drives the nozzle 16 through the second rotating shaft 23, so that the rotation of the servo motor 33 leads to the driving of the nozzle 16.

In particular, the direction of rotation of the nozzle resulting from the driving is rotated about a meandering axis coinciding with the connection angle of the other bevel gear 35 engaged with the bevel gear 34 arranged in the longitudinal axis direction, such rotation of the nozzle 16. The property works in favor of securing a new angle of repair to the furnace wall surface.

When the other servomotor 38 is rotated, the first rotating shaft 21 is transmitted in the order of the reduction gear 39-the shaft-the bevel gear 37-the first rotating shaft 21 and the bevel gear 36 on the side. Rotate The rotation of the first rotating shaft 21 is transmitted to the main casing 24-the sub casing 25-the head casing 26, and finally the nozzle 16 coupled to the head casing 26 is rotated. Let's do it. At this time, each casing is interlocked along the first rotating shaft 21. Therefore, the nozzle is separated from the driving of the nozzle, and the nozzle is rotated while drawing a concentric circle in the longitudinal direction along the drive shaft, which plays an important role in selecting the injection direction of the refractory body against the furnace wall.

In this way, the nozzles are sprayed to the furnace wall maintenance target position by inducing the rotation of the nozzles through the rotation of the entire lance as well as the self-driving of the nozzles 16 through the selective rotation of the respective servomotors 33 and 38. It is possible to set the direction precisely.

In the case of damage to more complicated types of furnace walls such as degassing furnaces (1), in order to repair them hotly and to realize thermal spraying repair, in order to control the multi-directional position of the lance device and to spray the refractory powder on the furnace walls, Technical requirements must be in place. Representatively, the rotation of the lance and the nozzle should not change the flammable gas, oxygen supply route, etc., including refractory powder. Since the lance device is located in the furnace, heat resistance and durability to withstand high temperatures should be maintained. How to arrange complex fluid transfer lines in the lance system to create refractory spray conditions.

The present invention, while maintaining the position adjustment function of the nozzle through the lance rotating device and the nozzle drive unit in the lance device separately from the refractory powder for the thermal spraying, flammable gas, oxygen, such as the supply route, opening the cooling water line to adjust the position of the lance Including thermal spraying is possible.

5 and 6 are the details of the first rotating shaft 21 and the rotating housing 20 mounted thereto, the rotating housing 20 is connected to the supply pipe side of the distribution pipe 18 side (P) ) P1.P2.P3.P4.P5.P6, and the first rotating shaft 21 is connected to each of the holes P1 to P6 of the rotating housing 20. V1.V2. Has V3.V4.V5.V6.

Therefore, the remaining fluids except the refractory powder (U) by the powder transfer pipe 13 installed along the drive shaft, such as cooling water, combustible gas and oxygen, etc. of the rotating housing 20 and the first rotating shaft 21 In accordance with the connection of the hole P + the flow path V, it is then carried along the path given to the main / sub / head casings 24, 25, 26 and the second rotating shaft 23.

Combination of the rotating housing 20 / the first rotating shaft 20, 21 and the combination of the upper rotating housing 20a / the second rotating shaft 23 is commonly coupled to a rotary joint one It is possible to separate supply of fluid through one axis by securing a plurality of pipes through the axis of.

The coolant line flows along the outermost (casing) to block hot external heat.

7, both ends of the main / subcasing 24 and 25 forming the outer structure of the lance apparatus are flange 40 shaped for the joint, and the coolant port W is W1 to W6. Six are combustible gas ports G three G1-G3, and oxygen ports O three O1-O3 symmetrically arranged. The provision of such a conduit is nothing but a passageway for the delivery of the fluid to the destination, but in cooperation with the rotary joint (rotating shaft / rotating housing) through a single axis, ensuring that the nozzle is driven and the lance rotates. Carry to the side.

The nozzle 16 coupled to the head casing 26 is coupled by a flange coupling and detachable from the head casing 26. From this, the nozzle can be replaced so that the rear end cannot reach through the rotation of the lance and the position correction of the nozzle. Allows replacement of new nozzles for partial maintenance of the area, and aging nozzle replacements are made easily.

The position of the nozzle 16 is a first angle formed by engaging the second rotating shaft 23 in a meandering direction with an inclination of approximately 45 degrees with respect to the axial direction of the joint shaft 22 of the drive shaft, and horizontal with respect to the drive shaft. Spraying area for the wall in the degassing furnace (1) and the immersion pipe (2) (2a) by the extension part extending in the direction and the second angle bent at an angle of about 45 degrees inward from the extension part. Keep it in the optimal state.

8 shows a power transmission state for nozzle driving and lance rotation of a lance device according to the present invention.

9 shows an example of positioning of the lance apparatus of the present invention with respect to the degassing furnace 1. (A) is a state of partially repairing the inner wall of the lower side deposition pipe (2) (2a) of the degassing furnace (1) and the inner wall on the degassing furnace (1), and (b) the submerged pipe (2) (2a). (C) is the state which partially repairs the upper part of the degassing furnace 1 or the side wall of the immersion pipe (2) (2a).

In the case of (a), the provisional adjustment step of placing the lance device into the immersion pipe (2) (2a) through the lance elevating device (10) and the precise adjustment of aligning the position of the nozzle (16) around the repair target site In the precision adjustment step of the nozzle, the inner wall of the deposition pipe (2) (2a) or the nozzle 16 injection nozzle direction is adjusted to the maintenance target position by driving the servomotors (33) (38). It can be easily matched to any position of the furnace inner wall.

In the case of (B), the nozzle 16 of the nozzle 16 is accurately positioned at the repair target point through the temporary adjustment step of the lance device 11 through the lifting device 10 and the precise adjustment step of the nozzle as in the case of (A). It is correct.

In the case of (C), under the same conditions as in (A) and (B), the thermal spraying of the rear part is performed by replacing the nozzle having a different inclination angle into the head casing 26.

As described above, the present invention enables hot repair of the furnace inner wall, as well as repair of furnaces and converters having an open top, as well as thermal furnace spray repair of a complex type such as a degassing furnace.

The present invention enables easy adjustment of the refractory body injection position through the rotation of the lance apparatus for injecting the refractory to the target position of the furnace wall repair and the operation of the nozzle, thereby enabling partial repair including the repair of a wide range of areas and a complex shape such as a degassing furnace. Effective for hot repair of furnace walls.

In addition, while maintaining the heat resistance and durability of the lance system in the process of transporting refractory powders of various fluids required for refractory spraying maintenance, while satisfying these conditions, the position control of the nozzle through the rotation of the lance and the independent operation of the nozzle for the furnace wall Nozzle maintenance positioning is implemented on one axis to achieve hot repair of furnace walls from a relatively simple arrangement of devices.

In addition, in the hot repair of the furnace wall, the conditions necessary to replace the repair of the fireproof body determined by the spray type of the fireproof body with the thermal spraying method, for example, technical limitations due to the transport of various fluids and the positioning of the nozzle It is effective to meet the conditions for thermal spraying by converging on the axis.

Claims (6)

A rotating device for rotatably coupling the upper and lower slide frames and the lances to guide the up and down movement of the lances is added, and the gas supporting the lances for injecting a refractory body to the inner wall or the outer wall along the slide frame, and the lances In the furnace wall hot repair lance apparatus having a conveying conduit for sending the refractory powder with the combustible gas, and another flow path for circulating the cooling water around the conveying conduit, It consists of a single shaft joint material, as a whole drive shaft on the longitudinal axis for conveying the refractory powder by combining a plurality of said shaft joint material, A casing that surrounds the drive shaft and opens a flow path, A powder conveying tube which is guided to the drive shaft to convey refractory powder; A nozzle driving unit having a first rotating unit which couples an external power transmission device to one end of the drive shaft to transmit power, and a refracted second rotating unit which adjusts the nozzle direction angle in its original position by the power obtained from the first rotating unit; A lance rotating part coupled to an external power transmission device to induce an axial rotation of the nozzle by rotating the drive shaft independently of the powder conveying pipe; A distribution station mounted to the outer wall of the drive shaft for supplying the cooling water and the combustible gas to branch along the drive shaft; In order to maintain the flow of fluid separately supplied from the distribution station irrespective of the rotation of the drive shaft and the nozzle, the spray contact repair lance apparatus of the furnace wall comprises a tangential surface of the joint portion of the distribution part and the nozzle. . According to claim 1, The drive shaft is a main shaft fixed to the base, A first rotating shaft coupled to the main shaft in the same line and equipped with a distribution station and a rotating housing; One or more joint shafts combined with the first rotating shaft to guide rotation while guiding the powder conveying pipe; And a second rotating shaft that is coupled to the front end of the joint shaft to guide the nozzle coupling and extends the rotational area of the nozzle. The casing of claim 1, wherein the casing is divided into a main casing, a sub casing, and a head casing, which are connected in a row along the driving shaft to guide the interaxial coupling to the driving shaft, respectively, and a water pipe carrying the cooling water and a gas carrying the combustible gas. A spray repair lance device for a furnace wall, wherein the supply path and the oxygen supply path are separately opened. 2. The driven side according to claim 1, wherein the nozzle driving part comprises: a driven side having a bevel gear mounted on a lower main shaft of a powder conveying pipe in which the first rotating part is formed in the longitudinal axis direction by a supporting plate and a plurality of supporting members; A driving side for transmitting power by engaging the bevel gear at a position orthogonal to the bevel gear, And a servo motor for transmitting power to the bevel gear, wherein the second rotation part is equipped with a bevel gear in the axial direction at the distal end of the joint shaft to mediate the power generated from the first rotation part and meanders with the bevel gear. The thermal spraying lance device of a furnace wall configured to drive a nozzle along a meandering axis by attaching a meandering bevel gear to a second rotating shaft in order to transmit the rotational force transmitted by being matched to the joint shaft inflection angle to the nozzle side. . The drive of claim 1, wherein the lance rotating unit is configured to mount a bevel gear to a first rotating shaft to form a driven side and to engage the bevel gear at a position orthogonal to the driven side bevel gear to transfer power of the thermomotor. And a main casing, a sub casing and a head casing with respect to the first rotating shaft, interlocked by the servo motor rotational force of the driving side, so that the driving force is involved in the rotation of the nozzle. Thermal spray lance device. The thermal spray repair lance apparatus according to claim 1, wherein the nozzle is detachably attached to the outer side of the head casing by flange coupling.