Seal Structure

Abstract

To provide a seal structure to be placed between components of an industrial furnace, which can be applied to a large heat treatment furnace, has a simple configuration, and is excellent in cost. [Solution] A sealing structure that seals a gap S1 formed between constituent parts of the furnace body 11, 12 of an industrial furnace 100, in which a rope 4 is arranged as a sealing material in the first gap S12, S13 formed in the vertical direction, and a water sealing structure that collects water in recesses 21, 31 is arranged as a sealing material in the second gap S11, S14 formed in the horizontal direction, and at least a portion of the rope 4 is immersed in the water in the recesses 21, 31.

Description

[Technical field]

[0001] The present invention relates to a seal structure for sealing gaps formed between components of an industrial furnace. [Background technology]

[0002] Conventionally, in industrial furnaces, gaps are formed between the components to absorb the thermal expansion of each component. Heat-resistant ropes made of ceramic fibers, as shown in Patent Document 1, are arranged in such gaps to seal the gaps so that the atmosphere inside the furnace does not leak to the outside. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2009-221503 A [Patent Document 2] JP 2009-24966 A Summary of the Invention [Problem to be solved by the invention]

[0004] Here, when the industrial furnace is a large facility such as a continuous heat treatment furnace, the metal furnace body thermally expands due to high temperatures during operation, but heat-resistant ropes do not have sufficient restoring force after being compressed, making it difficult to respond to large dimensional changes in the gap. Therefore, it is possible to use a metal expansion pipe as shown in Patent Document 2, but using it around the entire circumference of a large furnace body is very costly and construction and repair work is also difficult.

[0005] SUMMARY OF THE PRESENT EMBODIMENTS An object of the present invention is to provide a seal structure to be placed between components of an industrial furnace, which has a simple structure and is cost-effective and can be applied to large heat treatment furnaces. [Means for solving the problem]

[0006] The present invention relates to a seal structure for sealing a gap formed between components of a furnace body of an industrial furnace, A rope is disposed as a sealing material in the first gap formed in the vertical direction, In the second gap formed in the horizontal direction, a water-sealing structure in which water is stored in the recess as a sealant is arranged, At least a portion of the rope is adapted to be immersed in the water within the recess.

[0007] According to the above configuration, a water-sealing structure is applied to the second horizontal gap to seal the gap, and a rope is applied to the first vertical gap where it is difficult to apply a water-sealing structure, while at least a portion of the rope is immersed in the water in the recess to constantly replenish moisture and maintain the rope's restoring force. As a result, it is possible to provide a cost-effective sealing structure that can accommodate large dimensional changes in the gap in both the horizontal and vertical directions with a simple configuration of a water-sealing structure and a rope. Effect of the Invention

[0008] According to the present invention, it is possible to provide a seal structure to be disposed between components of an industrial furnace, which has a simple configuration and is excellent in cost performance. [Brief description of the drawings]

[0009] [Figure 1] 1 is a schematic perspective view of an industrial furnace equipped with a seal structure according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a cross-sectional view taken along line II-II of FIG. [Diagram 3] FIG. 3 is a view taken along the arrow III in FIG. [Figure 4] FIG. 4 is a cross-sectional view taken along line IV-IV of FIG. [Diagram 5] FIG. 3 is a cross-sectional view of FIG. 2 . [Figure 6] 6 is a cross-sectional view taken along line VI-VI of FIG. [Figure 7] FIG. 6 is a cross-sectional view corresponding to FIG. 5 when two ropes are arranged. [Figure 8]FIG. 7 is a cross-sectional view corresponding to FIG. 6 when two ropes are arranged. [Figure 9] IX-IX arrow view of FIG. 2 in the vicinity of the drain outlet. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] (First embodiment) FIG. 1 is a schematic perspective view of an industrial furnace 100 equipped with a seal structure 10 according to an embodiment of the present invention. FIG. 2 is a cross-sectional view taken along line II-II in FIG. 1, and FIG. 3 is a view taken along line III in FIG. 1. And FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 2. The industrial furnace 100 is an apparatus for heating and heat-treating a material to be treated at a predetermined temperature. As shown in FIG. 1, the industrial furnace 100 has a furnace body 1 that accommodates and treats the material to be treated. The furnace body 1 is configured by connecting a plurality of furnace bodies in order to absorb the thermal expansion of the furnace body 1. For example, in this embodiment, two furnace bodies 11 and 12 are connected in the furnace length direction Y with a gap therebetween to form one furnace body 1.

[0011] A gap S1 is formed between the furnace body 11 and the furnace body 12 in order to absorb the difference in thermal expansion between the furnace body 11 and the furnace body 12.

[0012] The gap S1 between the furnace body 11 and the furnace body 12 is formed around the entire circumference of the end face between the right end face of the furnace body 11 and the left end face of the furnace body 12. That is, a gap S11 is formed between the upper surface 111 of the furnace body 11 and the upper surface 121 of the furnace body 12, a gap S12 is formed between the side surface 112 of the furnace body 11 and the side surface 122 of the furnace body 12, a gap S13 (a gap on the opposite side to the gap S12) is formed between the side surface 113 of the furnace body 11 (the surface opposite to the side surface 112) and the side surface 123 of the furnace body 12 (the surface opposite to the side surface 122), and a gap S14 is formed between the bottom surface 114 of the furnace body 11 and the bottom surface 124 of the furnace body 12. When the furnace body 11 and the furnace body 12 are not thermally deformed, the gaps S11, S12, S13, and S14 have the same dimensions. In this specification, the right side of the furnace length direction Y as viewed from the arrow III in FIG. 1 will be referred to as the right side, and the left side will be referred to as the left side.

[0013] Here, the gaps S12 and S13 are gaps formed in the vertical direction and correspond to the first gap, while the gaps S11 and S14 are gaps formed in the horizontal direction and correspond to the second gap.

[0014] As shown in FIG. 1 to FIG. 4, a water sealing structure in which water is stored in a recess as a sealant is arranged in the gap S11. Specifically, the upper recess 21 is formed on the upper surface 111 of the furnace body 11 over the entire furnace width direction X of the furnace body 1, and water is stored in the upper recess 21. In addition, on the upper surface 121 of the furnace body 12, a protruding portion 22 that protrudes upward and has an inverted U-shape in side view is formed over the entire X direction. Then, one end 22a of the protruding portion 22 is immersed in the water in the upper recess 21, so that the gap S11 is sealed by the water sealing structure. In this embodiment, the upper recess 21 is formed on the upper surface 111, and the protruding portion 22 is formed on the upper surface 121, but the protruding portion may be formed on the upper surface 111, and the recess may be formed on the upper surface 121.

[0015] In the gap S14, a water sealing structure in which water is stored in a recess is arranged as a sealant. Specifically, the lower recess 31 is formed over the entire X direction on the bottom surface 124 of the furnace body 12, and water is stored in the lower recess 31. In addition, a protrusion 32 that protrudes downward and has an inverted U shape in side view is formed over the entire X direction on the bottom surface 114 of the furnace body 11. Then, one end 32a of the protrusion 32 is immersed in the water in the lower recess 31, so that the gap S14 is sealed by the water sealing structure. In this embodiment, the lower recess 31 is formed on the bottom surface 124, and the protrusion 32 is formed on the bottom surface 114, but the protrusion may be formed on the bottom surface 124, and the recess may be formed on the bottom surface 114.

[0016] FIG. 5 is a VV cross-sectional view of FIG. 2. As shown in FIG. 5, a rope is disposed in the gap S12 as a sealing material. Specifically, the rope 4 is disposed over the entire gap S12 in the up-down direction. That is, a protrusion 51 that protrudes outward and opens outward and has a U-shape in top view is formed at the right end of the side surface 112, and a protrusion 52 that protrudes outward and opens inward and has an inverted U-shape in top view is formed at the left end of the side surface 122. The U-shaped protrusion 51 and the inverted U-shaped protrusion 52 overlap in the left-right direction by the right end 51a of the protrusion 51 being located to the right of the left end 52a of the protrusion 52. In addition, the rope 4 is disposed in the gap between the right end 51a of the protrusion 51 and the left end 52a of the protrusion 52, so that the gap S12 is sealed by the rope 4. In this embodiment, a U-shaped protrusion 51 is formed on side surface 112, and an inverted U-shaped protrusion 52 is formed on side surface 122, but an inverted U-shaped protrusion may be formed on side surface 112, and a U-shaped protrusion may be formed on side surface 122.

[0017] FIG. 6 is a cross-sectional view taken along the line VI-VI in FIG. 2. As shown in FIG. 6, a rope is disposed in the gap S13 as a sealing material. Specifically, the rope 4 is disposed over the entire gap S13 in the up-down direction. That is, a protruding portion 61 that protrudes outward and opens outward and has a U-shape in top view is formed at the right end of the side surface 113, and a protruding portion 62 that protrudes outward and opens inward and has an inverted U-shape in top view is formed at the left end of the side surface 123. The U-shaped protruding portion 61 and the inverted U-shaped protruding portion 62 overlap in the left-right direction by the right end 61a of the protruding portion 61 being positioned to the right of the left end 62a of the protruding portion 62. In addition, the rope 4 is disposed in the gap between the right end 61a of the protruding portion 61 and the left end 62a of the protruding portion 62, so that the gap S13 is sealed by the rope 4. In this embodiment, a U-shaped protrusion 61 is formed on side surface 113 and an inverted U-shaped protrusion 62 is formed on side surface 123, but an inverted U-shaped protrusion may be formed on side surface 113 and a U-shaped protrusion may be formed on side surface 123.

[0018] (2 ropes) Two ropes may be arranged in the gap S12 as a sealing material. FIG. 7 is a cross-sectional view corresponding to FIG. 5 in the case where two ropes are arranged. As shown in FIG. 7, the ropes 41 and 42 are arranged over the entire gap S12 in the up-down direction. That is, a protruding portion 72 is formed at the left end of the side surface 122, which is formed by combining two inverted U-shaped members that protrude outward and open inward when viewed from above, and a protruding portion 71 that protrudes outward and opens outward when viewed from above is formed at the right end of the side surface 112. The U-shaped protruding portion 71 is positioned inside the protruding portion 72 in the left-right direction. One rope 41 is arranged in the gap between the right wall 71a of the protruding portion 71 and the central wall 72a of the protruding portion 72, and the other rope 42 is arranged in the gap between the central wall 72a of the protruding portion 72 and the left wall 71b of the protruding portion 71, so that the gap S12 is sealed by the two ropes. When the side surface 112 and the side surface 122 approach each other due to thermal expansion, the gap between the central wall 72a of the protrusion 72 and the left wall 71b of the protrusion 71 becomes smaller, and the other rope 42 arranged therein is compressed, thereby ensuring the sealing performance. On the other hand, when the side surface 112 and the side surface 122 move away from each other due to thermal expansion, the gap between the central wall 72a of the protrusion 72 and the right wall 71a of the protrusion 71 becomes smaller, and the one rope 41 arranged therein is compressed, thereby ensuring the sealing performance. In this embodiment, the protrusion 72 formed by combining two inverted U-shaped members is formed on the side surface 122, and the U-shaped protrusion 71 is formed on the side surface 112, but a U-shaped protrusion may be formed on the side surface 122, and a protrusion formed by combining two inverted U-shaped members may be formed on the side surface 112.

[0019] Two ropes may be arranged in the gap S13 as a sealing material. FIG. 8 is a cross-sectional view corresponding to FIG. 6 in the case where two ropes are arranged. As shown in FIG. 8, the ropes 41 and 42 are arranged in a pair in the gap S13 so as to be aligned in the left-right direction, over the entire vertical direction. That is, a protruding portion 81 that protrudes outward and has a U-shape when viewed from above, which opens outward, is formed at the right end of the side surface 113, and a protruding portion 82 that protrudes outward and is formed by combining two inverted U-shaped members when viewed from above, which open inward, is formed at the left end of the side surface 123. The U-shaped protruding portion 81 is positioned inside the protruding portion 82 in the left-right direction. Then, one rope 41 is arranged in the gap between the right wall 81a of the protrusion 81 and the central wall 82a of the protrusion 82, and the other rope 42 is arranged in the gap between the central wall 82a of the protrusion 82 and the left wall 81b of the protrusion 81, so that the gap S13 is sealed by the two ropes. When the side surface 113 and the side surface 123 approach each other due to thermal expansion, the gap between the central wall 82a of the protrusion 82 and the left wall 81b of the protrusion 81 becomes smaller, and the other rope 42 arranged therein is compressed, thereby reliably ensuring the sealing property. On the other hand, when the side surface 113 and the side surface 123 move away from each other due to thermal expansion, the gap between the central wall 82a of the protrusion 82 and the right wall 81a of the protrusion 81 becomes smaller, and the one rope 41 arranged therein is compressed, thereby reliably ensuring the sealing property. In this embodiment, a U-shaped protrusion 81 is formed on side surface 113, and a protrusion 82 made of two inverted U-shaped members joined together is formed on side surface 123, but a protrusion made of two inverted U-shaped members joined together may be formed on side surface 113, and a U-shaped protrusion may be formed on side surface 123.

[0020] (Overall rope configuration) 1 and 2, in gap S1, the rope 4 is disposed over the entire gap S11 in the X direction, over the entire gap S12 in the vertical direction, and over the entire gap S13 in the vertical direction. That is, one end of the rope 4 is immersed in the water in the lower recess 31, and the other end is also immersed in the water in the lower recess 31. The rope 4 is disposed so that it extends from the one end immersed in the water in the lower recess 31 upward along the gap S12, extends in the X direction while immersed in the water in the upper recess 21, and extends downward along the gap S13 to reach the other end immersed in the water in the lower recess 31.

[0021] At both ends of the upper recess 21 in the X direction, protrusions 91 and 92 are formed, which protrude upward, and the protrusions 91 and 92 are adapted to hold the rope 4. The rope 4 extending upward along the gap S12 extends downward beyond the protrusion 91 and is immersed in the water in the upper recess 21. The rope 4 is adapted to seal the gap between the protrusion 91 and the upper wall of the furnace body (the protrusion 22 that opens inward and has an inverted U-shape in side view) by the part of the rope 4 that exceeds the protrusion 91. Furthermore, the rope 4 that is immersed in the water in the upper recess 21 and extends in the X direction extends upward to exceed the protrusion 92, and then extends downward along the gap S13 beyond the protrusion 92. The rope 4 is adapted to seal the gap between the protrusion 92 and the upper wall of the furnace body (the protrusion 22 that has an inverted U-shape) by the part of the rope 4 that exceeds the protrusion 92. That is, the rope 4 is held in place by being pinched by the protrusions 91, 92 to the upper wall of the furnace body (the inverted U-shaped protrusion 22) so as not to fall into the lower recess 31.

[0022] Even when two ropes are arranged, the ropes 41 and 42 have the same configuration as the rope 4 described above.

[0023] The ropes 4, 41, 42 arranged in the gap S1 are, for example, heat-resistant ropes, made of, for example, ceramic fiber, and have elasticity and heat resistance. 2 O 3) and silica (SiO 2 ) as its main component. Ceramic fiber has a thermal conductivity of 1 / 10 that of firebricks and 1 / 2 that of insulating bricks, and the amount of heat dissipated to the outside of the furnace is small. It is also lighter than bricks at 1 / 10 its weight, so it can reduce heat storage loss, resulting in a large energy saving effect. Ceramic fiber is also excellent in chemical resistance other than strong alkali, fluorine, and phosphoric acid because it is mainly composed of high-purity alumina and silica, and alumina fiber in particular has low reactivity. In addition, since the rope is a fiber, it has water absorption, and this characteristic is utilized in the present invention to enhance sealing properties. Even if the gaps in the furnace body approach and the rope is compressed and thinned, and then the gaps move apart, water is replenished in the rope fibers, so the rope does not remain thin, but returns to its original thickness.

[0024] (Water supply and drainage) As shown in Figs. 2 and 3, the upper recess 21 is provided with a water inlet 93 for supplying water into the upper recess 21. The water inlet 93 is formed above the upper recess 21 on the upper surface 111. The lower recess 31 is also formed with a drain port 94 for draining water from the lower recess 31. The drain port 94 is positioned vertically at a height that allows the water stored in the lower recess 31 to overflow at a height that maintains the sealing property. As shown in Figs. 2 and 5, a space V1 is formed in the gap S12 on the furnace side with respect to the rope 4, which is a sealing material, and similarly, as shown in Figs. 2 and 6, a space V2 is formed in the gap S13 on the furnace side with respect to the rope 4, which is a sealing material. The water supplied into the upper recess 21 by the water inlet 93 is impregnated into the rope 4 in the spaces V1 and V2, and flows into the lower recess 31. The water in the lower recess 31 is drained from the drain port 94, as shown in Figs. 2 and 3. Fig. 9 is a view taken along the line IX-IX in Fig. 2 in the vicinity of the drain outlet 94. As shown in Fig. 3 and Fig. 9, the drain outlet 94 is disposed near the water surface of the water in the lower recess 31. In addition, the spaces V1 and V2 are connected to an exhaust outlet 95 that releases the atmosphere in the furnace to the outside.

[0025] (Ammonia combustion furnace) When the industrial furnace is an ammonia-burning furnace, that is, when a burner using ammonia as fuel gas is used, unburned ammonia may remain in the atmosphere inside the furnace. If it leaks to the outside through the gaps in the furnace body, it will emit a foul odor, which is undesirable for the environment. In the seal structure 10 of this embodiment, the atmosphere inside the furnace can be locally exhausted to the outside through the upper exhaust port 95 via the spaces V1 and V2, so that the exhaust can be connected to an exhaust facility (not shown) for disposal. In addition, since the gaps S1 between the furnace bodies 11 and 12 are sealed by the ropes impregnated with water and the water sealing structure, the unburned ammonia is dissolved (absorbed) in the water impregnated in the ropes 4 and the water used in the water sealing structure, and it is possible to further prevent leakage to the outside. The water stored in the upper recess 21 and the lower recess 31 is constantly evaporated and reduced due to the high temperature inside the furnace, so that the water levels are monitored by water level gauges (not shown), and water is supplied from the water supply port 93 to maintain the sealing performance. Furthermore, even if the ammonia concentration in the water in the seal structure increases, the ammonia concentration in the water can be reduced by supplying water from the water inlet 93 and discharging water from the drain outlet 94.

[0026] The seal structure 10 having the above configuration can provide the following effects.

[0027] (1) In the seal structure 10, the ropes 4, 41, 42 are arranged as a seal material in the first gaps S12, S13 formed in the vertical direction, and a water sealing structure in which water is stored in the recesses 21, 31 is arranged as a seal material in the second gaps S11, S14 formed in the horizontal direction, and at least a part of the ropes 4, 41, 42 is immersed in the water in the recesses 21, 31. That is, the water sealing structure is applied to the second gaps S11, S14 in the horizontal direction to seal the gap, and the ropes 4, 41, 42 are applied to the first gaps S12, S13 in the vertical direction to which it is difficult to apply the water sealing structure, while at least a part of the ropes 4, 41, 42 is immersed in the water in the recesses 21, 31 to constantly replenish moisture and maintain the restoring force of the ropes 4, 41, 42. As a result, it is possible to provide a seal structure that can respond to large dimensional changes in the gaps in both the horizontal and vertical directions and is cost-effective with a simple configuration of a water sealing structure and ropes.

[0028] (2) In the first gaps S12, S13, spaces V1, V2 are formed on the closed side of the furnace with respect to the sealing material, and the spaces V1, V2 are connected to an exhaust port 95 that releases the atmosphere inside the furnace to the outside. Therefore, a configuration can be formed in which the spaces V1, V2 can be used to release the atmosphere inside the furnace to the outside.

[0029] (3) The upper recess 21 of the second gap S11 formed in the upper part of the furnace body 11 is provided with a water supply port 93 for supplying water into the upper recess 21, and the lower recess 31 of the second gap S14 formed in the bottom of the furnace body 12 is provided with a drain port 94 for discharging water from within the lower recess 31. As a result, it is possible to supply water into the upper recess 21 and to discharge water out of the lower recess 31, so that the amount and composition of water in the recesses 21 and 31 can be appropriately maintained.

[0030] (4) Projections 91, 92 that project upward are formed on both ends of the upper recess 21, and the rope 4 that is immersed in the water in the upper recess 21 climbs over the projections 91, 92, extends downward in contact with the inner surface of the upper wall of the furnace bodies 11, 12, and is immersed in the water in the lower recess 31. As a result, the rope 4 can seal the gap between the projections 91, 92 and the inner surface of the upper wall, and the projections 91, 92 can prevent the rope 4 from falling.

[0031] (5) When two ropes are arranged, a pair of ropes 41, 42 are arranged in the first gaps S12, S13 so as to be aligned in the left-right direction. Therefore, when the components of the furnace bodies 11, 12 approach or move away from each other due to heat, by arranging a pair of ropes in the left-right direction, which contract when the components approach each other and a pair of ropes that contract when the components move away from each other, it becomes easy to ensure the sealing of the first gaps S12, S13 in either case.

[0032] (6) In an ammonia combustion furnace, the fuel gas contains ammonia, which is easily dissolved in water. Therefore, by sealing the first gaps S12, S13 with ropes at least partially immersed in water and the second gaps S11, S14 with a water-sealed structure, it is possible to make it more difficult for unburned ammonia to dissolve in water by the ropes and water-sealed structure and be released to the outside.

[0033] In this embodiment, two furnace bodies 11 and 12 are connected horizontally with a gap S1 to form one furnace body 1, but three or more furnace bodies may be connected horizontally with a gap between them to form one furnace body. In that case, the seal structure 10 of this embodiment is applied to each gap.

[0034] The present invention and embodiments can be summarized as follows.

[0035] (1) One embodiment of the present invention is a seal structure for sealing a gap formed between components of a furnace body of an industrial furnace, A rope is disposed as a sealing material in the first gap formed in the vertical direction, In the second gap formed in the horizontal direction, a water-sealing structure in which water is stored in the recess as a sealant is arranged, At least a portion of the rope is adapted to be immersed in the water within the recess.

[0036] According to the above-mentioned configuration (1), a water-sealing structure is applied to the second horizontal gap to seal the gap, and a rope is applied to the first vertical gap to which it is difficult to apply a water-sealing structure, while at least a portion of the rope is immersed in the water in the recess to constantly replenish moisture and maintain the rope's restoring force. As a result, it is possible to provide a cost-effective sealing structure that can accommodate large dimensional changes in the gap in both the horizontal and vertical directions and with a simple configuration of a water-sealing structure and a rope.

[0037] (2) In the above configuration (1), a space is formed in the first gap on the furnace closing side with respect to the sealing material, The space communicates with a passage for discharging the atmosphere inside the furnace to the outside.

[0038] According to the above configuration (2), a configuration can be formed in which the atmosphere inside the furnace can be discharged to the outside by utilizing the space.

[0039] (3) In the above configuration (1) or (2), a water supply port is provided in the upper recess of the second gap formed in the upper part of the furnace body to supply water into the upper recess, A drain outlet is provided in the lower recess of the second gap formed in the bottom of the furnace body to drain water from within the lower recess.

[0040] According to the above configuration (3), since it is possible to supply water into the recess and discharge water to the outside of the recess, the amount and composition of water in the recess can be kept appropriate.

[0041] (4) In the above-mentioned configuration (3), a protrusion protruding upward is formed on each end of the upper recess, The rope, which is immersed in the water in the upper recess, climbs over the protrusion, extends downward in contact with the inner surface of the upper wall of the furnace body, and is immersed in the water in the lower recess.

[0042] According to the above configuration (4), the gap between the protruding portion and the inner surface of the upper wall can be sealed by the rope, and the protruding portion can prevent the rope from falling off.

[0043] (5) In any one of the configurations (1) to (4), a pair of the ropes are arranged in the first gap so as to be aligned in the left-right direction.

[0044] According to the above configuration (5), when the components of the furnace body approach or move away from each other due to heat, by arranging a pair of ropes in the left-right direction that contract when the components approach each other and a pair of ropes that contract when the components move away from each other, it becomes easy to ensure the sealing of the first gap in either case.

[0045] (6) In any one of the above configurations (1) to (5), the industrial furnace is an ammonia combustion furnace.

[0046] According to the configuration (6), in the ammonia combustion furnace, the fuel gas contains ammonia, and since ammonia is easily dissolved in water, by making the first gap sealed with a rope at least a portion of which is immersed in water and the second gap of a water-sealed structure, it is possible to make it more difficult for unburned ammonia to dissolve in water in the rope or water-sealed structure and to be released to the outside.

[0047] Various modifications and variations can be made without departing from the spirit and scope of the invention as set forth in the following claims. [Industrial Applicability]

[0048] The present invention provides a sealing structure to be placed between components of an industrial furnace, which can be applied to large heat treatment furnaces, has a simple configuration, and is cost-effective, and is therefore of great industrial value. [Explanation of symbols]

[0049] 1 Furnace body 10. Seal structure 11 Furnace body 12 Furnace body 111 Top surface 121 Top surface 112 side 122 side 113 side 123 side 114 Bottom 124 Bottom 21 Upper recess 22 Projection 22a One end 31 Lower recess 32 Projection 32a One end 4. Rope 41 Rope 42 Rope 51 Projection 51a Right end 52 Projection 52a Left end 61 Projection 61a Right end 62 Projection 62a Left end 71 Projection 71a Right wall 71b Left wall 72 Projection 72a Center wall 81 Projection 81a Right wall 81b Left wall 82 Projection 82a Center wall 91 Protrusion 92 Protrusion 93 Water inlet 94 Drain 95 Exhaust port 100 Industrial Furnace S1 Gap S11 Gap S12 Gap S13 Gap S14 Gap V1 space V2 space X Width direction Y Furnace length direction

Claims

1. A seal structure for sealing a gap formed between components of a furnace body of an industrial furnace, A rope is disposed as a sealing material in the first gap formed in the vertical direction, A water sealing structure in which water is stored in a recess as a sealant is disposed in the second gap formed in the horizontal direction, A sealing structure, wherein at least a portion of the rope is adapted to be immersed in water within the recess.

2. A space is formed in the first gap on the furnace inner closure side with respect to the sealing material, 2. The seal structure according to claim 1, wherein the space communicates with an exhaust port for discharging the atmosphere inside the furnace to the outside.

3. A water supply port is provided in the upper recess of the second gap formed in the upper part of the furnace body to supply water into the upper recess, The sealing structure according to claim 1 , wherein a drain port is provided in a lower recess of the second gap formed in the bottom of the furnace body to drain water from within the lower recess.

4. The upper recess has two ends each formed with a protrusion protruding upward, The sealing structure according to claim 3 , wherein the rope, which is immersed in the water in the upper recess, passes over the protrusion, extends downward in contact with the inner surface of the upper wall of the furnace body, and is immersed in the water in the lower recess.

5. The seal structure according to claim 1 , wherein a pair of the ropes are arranged in the first gap so as to be aligned in the left-right direction.

6. The sealing structure according to any one of claims 1 to 5, wherein the industrial furnace is an ammonia combustion furnace.

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