Novel double-chamber kiln lining structure

Abstract

The utility model discloses a novel double-hearth kiln lining structure and relates to the technical field of kiln linings. The first V-shaped anchoring part is arranged at the elevation of 28.530 m or above of the kiln shell IV through an expansion bolt, a rod body of the first anchoring part is arranged at the elevation position of 28.188 m or below and 25.246 m of the kiln shell IV, and the second V-shaped anchoring part is arranged on the inner side of a lower protection plate of the kiln shell IV and an upper structural part hopper of the discharging device. The hexsteel 2 is welded to a rod body of the first anchoring part and the inner side of a second V-shaped anchoring part of the discharging device upper structural part hopper, and the lining layer 4 is arranged on the inner side of the kiln shell IV and the inner side of the discharging device upper structural part hopper. The V-shaped anchoring parts and the T-shaped anchoring parts are arranged on the kiln shell and the upper structural part of the discharging device in a segmented mode, the hexsteel and the anchoring parts are welded, and then the refractory material spraying material is used for spraying to form the lining layer, so that the kiln shell can be well protected, the lining layer can be repaired more conveniently, and the service life of the lining layer is prolonged. Therefore, the service life of the kiln shell is prolonged, and the product quality is improved.

Description

Technical Field

[0001] The utility model relates to a novel double-chamber kiln lining structure, and relates to the technical field of kiln linings. Background Art

[0002] The double-chamber kiln, also known as the double-chamber parallel flow regenerative lime kiln, uses two kiln chambers for alternating calcination. The lime burned has high activity and good quality.

[0003] Since the double-chamber kiln is in high-temperature production operation for a long time and is subjected to vertical gravity impact and friction of the ore, the spray coating of part IV of the kiln shell (the main indicator is the kiln shell above 25.246m) is partially washed away by the ore, and cracks in the welds at the upper cone bucket and the connecting ring plate of the pallet discharger also occur from time to time. Long-term thermal stress and material pressure cause the kiln shell to burn red, dust to leak in the kiln, and dust to rise on site, seriously affecting normal production and on-site environmental safety, affecting the service life of the kiln shell, and it is difficult to enter the kiln for inspection and restoration. Internal construction cannot be carried out without completely stopping production for blowing and cooling the kiln. Therefore, a new double-chamber kiln lining structure is proposed to solve the problem of short service life of the kiln shell in the existing technology. Utility Model Content

[0004] The purpose of the utility model is to address the defects or shortcomings in the existing technology and provide a new double-chamber kiln lining structure, in which V-shaped anchors and T-shaped anchors are arranged in sections on the kiln shell and the upper structural parts of the unloading device, and a tortoise shell mesh is used to weld the anchors, and then a refractory spray coating is used to spray to form an inner lining layer, so as to obtain a better protection effect on the kiln shell and the inner lining layer can be repaired more conveniently, thereby extending the service life of the kiln shell and improving product quality.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: it includes a first V-shaped anchor 1, a tortoise shell net 2, a first anchor rod 3, an inner lining layer 4, and a second V-shaped anchor 5. The first V-shaped anchor 1 is arranged at an elevation of 28.530 meters or above of the kiln shell IV10 through an expansion bolt, the first anchor rod 3 is arranged at an elevation of 28.188 meters below and 25.246 meters of the kiln shell IV10, the second V-shaped anchor 5 is arranged on the inner side of the lower guard plate 11 of the kiln shell IV and the hopper 12 of the upper structure of the unloading device, the tortoise shell net 2 is welded to the first anchor rod 3 and the inner side of the second V-shaped anchor 5 of the hopper 12 of the upper structure of the unloading device, and the inner lining layer 4 is arranged on the inner side of the kiln shell IV10 and the inner side of the hopper 12 of the upper structure of the unloading device.

[0006] Furthermore, the top of the first V-shaped anchor 1 is bent toward both sides.

[0007] Furthermore, the inner lining layer 4 covers the first V-shaped anchor 1 , the tortoise shell net 2 , the first anchor rod 3 , and the second V-shaped anchor 5 .

[0008] Furthermore, the tortoise shell net 2 is tilted inward at an elevation of 25.246 meters near the kiln shell IV 10, and a second anchor rod 6 is provided at the tilted position to connect with the kiln shell IV 10. A reinforcement plate 7 is also provided at the tilted bottom. The second anchor rod 6 has the same structure as the first anchor rod 3, but is longer than the first anchor rod 3.

[0009] Furthermore, the tortoise shell net 2 includes a first bent steel sheet 21 and a second bent steel sheet 22. The first bent steel sheet 21 and the second bent steel sheet 22 have the same structure, but are staggered and oppositely arranged.

[0010] Furthermore, the main body of the first bent steel sheet 21 is bent toward both sides to form crests and troughs, and the crests and troughs can be spliced ​​together to form a regular hexagon.

[0011] Furthermore, a first fixing groove 211 is provided at the crest of the first bent steel sheet 21, a second fixing groove 212 is provided at the trough of the first bent steel sheet 21, and limiting steel sheets 213 are provided on both sides of the second fixing groove 212, and the width of the limiting steel sheet 213 matches the length of the first fixing groove 211.

[0012] Furthermore, the second bent steel sheet 22 is also provided with a first fixed groove 211, a second fixed groove 212, and a limiting steel sheet 213. The trough of the second bent steel sheet 22 is connected to the crest of the first bent steel sheet 21, and the limiting steel sheet 213 at the trough of the second bent steel sheet 22 passes through the first fixed groove 211 at the crest of the first bent steel sheet 21, and the limiting steel sheet 213 at the trough of the first bent steel sheet 21 passes through the first fixed groove 211 at the crest of the second bent steel sheet 22. All connections are welded, and a tortoise shell net 2 with a regular hexagonal grid structure is formed by connecting the crests and troughs of the first bent steel sheet 21 and the second bent steel sheet 22.

[0013] Furthermore, a plurality of pads 8 are provided on one side of the upper limit steel sheet 213 of the tortoise shell net 2. The pads 8 are square structures with screw holes. The pads 8 are threadedly connected to the first anchor rod 3 and the second anchor rod 6 and then welded to form a T-shaped anchor.

[0014] The working principle of the utility model is as follows: four kinds of anchors are used as the main load-bearing parts, which are respectively set at the elevation of 28.530 meters above the kiln shell IV 10, the elevation of 28.188 meters below to 25.246 meters below the kiln shell IV 10, and the inner side of the kiln shell IV lower guard plate 11 and the upper structure of the unloading device hopper 12. Due to the different impact strength at each place, different anchors are set, and the tortoise shell net 2 is not set at the elevation of 28.530 meters above the kiln shell IV 10 and the kiln shell IV lower guard plate 11, but the kiln shell A tortoise shell net 2 is set at the inner wall of the kiln shell of the lower guard plate 11 of IV. The tortoise shell net 2 is welded to the anchor to form an inner lining fixed structure, and the anchor and the tortoise shell net 2 are cast and covered inside the kiln shell by a wet process to form an impact-resistant and high-temperature resistant inner lining layer 4. The tortoise shell net 2 with a hexagonal grid structure has good load-bearing performance. At the same time, the inner lining layer 4 adopts HL-50G wear-resistant spray paint, which has temperature resistance of more than 800℃, wear resistance, and impact erosion resistance. Therefore, it is not easily damaged under high-temperature working conditions for a long time, thereby effectively ensuring product quality.

[0015] After adopting the above technical scheme, the beneficial effects of the utility model are as follows: V-shaped anchors and T-shaped anchors are set in sections on the upper structural parts of the kiln shell and the unloading device, and the anchors are welded with a tortoise shell mesh, and then a refractory spray coating is used to spray to form an inner lining layer, so as to obtain a better protection effect on the kiln shell and the inner lining layer can be repaired more conveniently, thereby extending the service life of the kiln shell and improving product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0017] Figure 1 It is a structural diagram of the utility model;

[0018] Figure 2 yes Figure 1 Cross-sectional view at AA in the middle;

[0019] Figure 3 yes Figure 1 Cross-sectional view at the middle BB;

[0020] Figure 4 yes Figure 1 The enlarged structural diagram at C in the middle;

[0021] Figure 5 yes Figure 1 The enlarged structural diagram at D in the middle;

[0022] Figure 6 yes Figure 1 The enlarged structural diagram at E in the middle;

[0023] Figure 7 yes Figure 1 The enlarged structural diagram at F in the middle;

[0024] Figure 8 yes Figure 1 The schematic diagram of the structure at G in the middle is enlarged;

[0025] Figure 9 It is a partial structural diagram of the tortoise shell net 2 in the present utility model;

[0026] Figure 10 It is a schematic structural diagram of the first bent steel sheet 21 in the present invention;

[0027] Figure 11 It is a structural diagram of the second bent steel sheet 22 in the present invention;

[0028] Figure 12 yes Figure 10 Bottom view of

[0029] Figure 13 This is a schematic structural diagram of the first V-shaped anchor 1 in the present invention;

[0030] Figure 14 It is a schematic structural diagram of the second V-shaped anchor 5 in the present utility model;

[0031] Figure 15 It is a structural schematic diagram of the T-shaped anchor piece in the utility model.

[0032] Explanation of the accompanying drawings: first V-shaped anchor 1, tortoise shell net 2, first anchor rod 3, inner lining layer 4, second V-shaped anchor 5, second anchor rod 6, reinforcement plate 7, pad 8, spray gun box 9, kiln shell IV 10, kiln shell IV lower guard plate 11, unloading device upper structure hopper 12, first bent steel sheet 21, second bent steel sheet 22, first fixing groove 211, second fixing groove 212, limiting steel sheet 213. DETAILED DESCRIPTION

[0033] See Figures 1-15As shown, the technical solution adopted in this specific embodiment is: it includes a first V-shaped anchor 1, a tortoise shell net 2, a first anchor rod 3, an inner lining 4, and a second V-shaped anchor 5. The first V-shaped anchor 1 is set at an elevation of 28.530 meters above the kiln shell IV 10 through an expansion bolt. The first anchor rod 3 is set at an elevation of 28.188 meters below and 25.246 meters above the kiln shell IV 10. The second V-shaped anchor 5 is set at the inner side of the kiln shell IV lower guard plate 11 and the upper structure hopper 12 of the unloading device. A mesh 2 is welded to the first anchor rod 3 and the inner side of the second V-shaped anchor 5 of the upper structure hopper 12 of the unloading device. The inner lining 4 is arranged on the inner side of the kiln shell IV 10 and the inner side of the upper structure hopper 12 of the unloading device. In this embodiment, the surface of the kiln shell is cleaned and a scaffold is built as needed to mainly remove the residue and rust on the surface of the kiln shell. If necessary, an angle grinder is used to grind the surface locally. After cleaning, it is blown clean with high-pressure air. The top of the wind cap in the kiln is used as the center and the line is placed on the distributor or the existing masonry line is used as the center line, and then the kiln shell is laid. Anchors are installed, among which the first V-shaped anchor is installed at the elevation of 28.530 meters above the kiln shell IV. The impact force at this section is small, so the tortoise shell net is not installed. The first anchor rod is installed at the elevation of 28.188 meters below and 25.246 meters above the kiln shell IV. The second anchor rod is installed on the inner side of the hopper of the lower guard plate of the kiln shell IV and the upper structure of the unloading device. After the above three anchors are installed, the tortoise shell net is welded. The welding of the tortoise shell net requires to be firm and not loose, and the overall flatness is required, and it cannot be uneven, and in some The places where the voids are relatively large and not suitable for repair welding of tortoise shell mesh should be repaired with the first V-shaped anchor. At the same time, if there is a coating part in the kiln shell that does not need to be removed, the tortoise shell mesh should be as close to the original coating as possible. In the places close to the old spray coating, it is necessary to prevent the pressure held by the tortoise shell mesh from causing the entire new welded tortoise shell mesh to be deformed. The part of the newly welded tortoise shell mesh that exceeds the old spray coating should be cut to avoid the stratification of the new and old spray coatings so as to form a whole. When the tortoise shell mesh is close to the spray gun box 9, it should be as close as possible to the spray gun box 9 to obtain a better spraying effect.

[0034] After the anchors and tortoise shell nets are arranged, the refractory material spraying operation is started. In this embodiment, the anchor material is 1Cr18Ni9Ti, and the refractory material spraying material adopts HL-50G wear-resistant spraying material with a temperature resistance of more than 800°C, wear resistance, and impact resistance. The spraying thickness of the position above 25.246 meters is 130mm, the spraying thickness of the kiln shell IV lower guard plate corresponding to the kiln shell is 50mm, and the spraying thickness of the hopper of the upper structure of the unloading device is 50mm. The thickness can be reduced according to the actual surface condition of the kiln shell, but the overall flatness must be guaranteed. , and it is necessary to ensure that the formed lining layer has no flow, no cracks, and no interlayers, honeycombs or holes, thereby effectively ensuring that in the subsequent actual production process, the lining layer has better impact resistance, friction resistance and high temperature resistance, and is not easily washed off by the ore, and prevents the lining layer from being subjected to long-term thermal stress and material pressure, which leads to frequent occurrence of kiln shell burning, dust leakage in the kiln, and dust on site, ensuring production safety and being more conducive to environmentally friendly production. At the same time, the maintenance of the lining layer is also more convenient. When local damage occurs, it is only necessary to spray the lining layer again without the need for comprehensive overall construction;

[0035] With the liner damage significantly reduced, the activity of the produced lime can be effectively improved, its loss on ignition percentage can be reduced, and the Cao percentage can be increased, thereby improving product quality and increasing product output;

[0036] In this embodiment, the double-cavity kiln has the same structure, so only one of the kiln structures is described. The connecting channel also uses anchors and tortoise shell mesh to form an inner lining layer.

[0037] To be more specific, the top of the first V-shaped anchor 1 is bent toward both sides. In this embodiment, the scouring force received by the position where the first V-shaped anchor is set is smaller than that of other parts. Therefore, the first V-shaped anchor with a structure with a top bent toward both sides is set at this position. The bending structure can better form a tensile structure when the inner lining layer is sprayed, and the inner lining layer has better impact resistance after cooling and forming.

[0038] To be more specific, the inner lining layer 4 covers the first V-shaped anchor 1, the tortoise shell net 2, the first anchor rod 3, and the second V-shaped anchor 5. The spraying of the inner lining layer must ensure that all anchors and tortoise shell nets are covered to prevent the mineral materials from damaging the structural parts during the production process. This is not only beneficial to extending the life of the kiln shell, but also conducive to subsequent maintenance operations.

[0039] To be more specific, the tortoise shell net 2 is inclined inward at an elevation of 25.246 meters near the kiln shell IV10, and a second anchor rod 6 is provided at the inclined position to connect with the kiln shell IV10. A reinforcement plate 7 is also provided at the inclined bottom. The second anchor rod 6 has the same structure as the first anchor rod 3, but is longer than the first anchor rod 3. The setting of the inclined portion is convenient for cutting. The setting of the second anchor rod can better support the tortoise shell net at this position. The second anchor rod is only a supplementary structure shown in this embodiment. According to the on-site conditions, a variety of anchor rods of different lengths can be set to better cooperate and support the tortoise shell nets at different positions, so that an inner lining layer with the best effect can be formed during spraying.

[0040] To be more specific, the tortoise shell net 2 includes a first bent steel sheet 21 and a second bent steel sheet 22. The first bent steel sheet 21 and the second bent steel sheet 22 have the same structure, but are staggered and oppositely arranged. In this embodiment, the tortoise shell net is a spliced ​​regular hexagonal structure, which is formed by staggered splicing and welding of the first bent steel sheet and the second bent steel sheet that are oppositely arranged. The grid structure can increase the overall load-bearing capacity, and can better cope with the stress caused by deformation, and effectively prevent the occurrence of cracking of the lining layer.

[0041] More specifically, the main body of the first bent steel sheet 21 is bent to both sides to form crests and troughs, and the crests and troughs can be spliced ​​to form a regular hexagon, and the first bent steel sheet 21 is provided with a first fixing groove 211 at the crest, and a second fixing groove 212 is provided at the trough of the first bent steel sheet 21. A limiting steel sheet 213 is provided on both sides of the second fixing groove 212, and the width of the limiting steel sheet 213 matches the length of the first fixing groove 211. The second bent steel sheet 22 is also provided with a first fixing groove 211, a second fixing groove 212, and a limiting steel sheet 213. The trough of the second bent limiting steel sheet 213 is connected to the crest of the first bent steel sheet 21, and the limiting steel sheet 213 at the trough of the second bent steel sheet 22 is connected to the crest of the first bent steel sheet 21. The positioning steel sheet 213 passes through the first fixing groove 211 at the peak of the first bent steel sheet 21, and the limiting steel sheet 213 at the trough of the first bent steel sheet 21 passes through the first fixing groove 211 at the peak of the second bent steel sheet 22. All connections are welded, and a tortoise shell net 2 with a regular hexagonal grid structure is formed by connecting the peaks and troughs of the first bent steel sheet 21 and the second bent steel sheet 22. In this embodiment, the first bent steel sheet and the second bent steel sheet are connected by the cooperation of the limiting steel sheets and the fixing grooves at the peaks and troughs, and then welded to form a tortoise shell net. The structure is simple, easy to process and manufacture, and the structure is firm and has good compressive resistance. It can be flexibly added or removed according to actual conditions, thereby effectively reducing the construction time.

[0042] To be more specific, a plurality of pads 8 are provided on one side of the upper limit steel sheet 213 of the tortoise shell net 2. The pads 8 are square structures with screw holes. The pads 8 are threadedly connected to the first anchor rod 3 and the second anchor rod 6 and then welded to form a T-shaped anchor. In order to improve the fixing effect of the tortoise shell net and ensure the use effect of the lining layer, pads are provided on the tortoise shell net to connect with the first and second anchor rods to form a T-shaped anchor, which increases the contact area between the fixed point and the lining layer, thereby increasing the pulling force of the anchor on the lining layer and obtaining a better fixing effect.

[0043] The working principle of the utility model is as follows: four kinds of anchors are used as the main load-bearing parts, which are respectively set at the elevation of 28.530 meters above the kiln shell IV 10, the elevation of 28.188 meters below to 25.246 meters below the kiln shell IV 10, and the inner side of the kiln shell IV lower guard plate 11 and the upper structure of the unloading device hopper 12. Due to the different impact strength at each place, different anchors are set, and the tortoise shell net 2 is not set at the elevation of 28.530 meters above the kiln shell IV 10 and the kiln shell IV lower guard plate 11, but the kiln shell A tortoise shell net 2 is set at the inner wall of the kiln shell of the lower guard plate 11 of IV. The tortoise shell net 2 is welded to the anchor to form an inner lining fixed structure, and the anchor and the tortoise shell net 2 are cast and covered inside the kiln shell by a wet process to form an impact-resistant and high-temperature resistant inner lining layer 4. The tortoise shell net 2 with a hexagonal grid structure has good load-bearing performance. At the same time, the inner lining layer 4 adopts HL-50G wear-resistant spray paint, which has temperature resistance of more than 800℃, wear resistance, and impact erosion resistance. Therefore, it is not easily damaged under high-temperature working conditions for a long time, thereby effectively ensuring product quality.

[0044] The above description is only used to illustrate the technical solution of the present invention and is not intended to limit it. Other modifications or equivalent substitutions made to the technical solution of the present invention by ordinary technicians in this field should be included in the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. A new type of double-chamber kiln lining structure, characterized by: The invention comprises a first V-shaped anchor (1), a tortoise shell net (2), a first anchor rod (3), an inner lining layer (4), and a second V-shaped anchor (5). The first V-shaped anchor (1) is arranged at an elevation of 28.530 meters or higher on the kiln shell IV (10) through expansion bolts. The first anchor rod (3) is arranged at an elevation of 28.188 meters to 25.246 meters below the kiln shell IV (10). The second V-shaped anchor (5) is arranged on the inner side of the lower guard plate (11) of the kiln shell IV and the hopper (12) of the upper structure of the discharge device. The tortoise shell net (2) is welded to the first anchor rod (3) and the inner side of the second V-shaped anchor (5) of the hopper (12) of the upper structure of the discharge device. The inner lining layer (4) is arranged on the inner side of the kiln shell IV (10) and the inner side of the hopper (12) of the upper structure of the discharge device.

2. The novel double-chamber kiln lining structure according to claim 1 is characterized in that: The top of the first V-shaped anchor (1) is bent toward both sides.

3. The novel double-chamber kiln lining structure according to claim 1 is characterized in that: The inner lining layer (4) covers the first V-shaped anchor (1), the tortoise shell mesh (2), the first anchor rod (3), and the second V-shaped anchor (5).

4. The novel double-chamber kiln lining structure according to claim 1 is characterized in that: The tortoise shell net (2) is tilted inward at an elevation of 25.246 meters near the kiln shell IV (10), and a second anchor rod (6) is provided at the tilted position to connect with the kiln shell IV (10). A reinforcing plate (7) is also provided at the tilted bottom. The second anchor rod (6) has the same structure as the first anchor rod (3), but is longer than the first anchor rod (3).

5. The novel double-chamber kiln lining structure according to claim 1 is characterized in that: The tortoise shell net (2) comprises a first bent steel sheet (21) and a second bent steel sheet (22). The first bent steel sheet (21) and the second bent steel sheet (22) have the same structure but are arranged in an offset and opposite manner.

6. The novel double-chamber kiln lining structure according to claim 5 is characterized in that: The main body of the first bent steel sheet (21) is bent toward both sides to form wave crests and wave troughs, and the wave crests and wave troughs can be spliced ​​together to form a regular hexagon.

7. The novel double-chamber kiln lining structure according to claim 6 is characterized in that: A first fixing groove (211) is provided at the wave crest of the first bent steel sheet (21), a second fixing groove (212) is provided at the wave trough of the first bent steel sheet (21), and limiting steel sheets (213) are provided on both sides of the second fixing groove (212), wherein the width of the limiting steel sheet (213) matches the length of the first fixing groove (211).

8. The novel double-chamber kiln lining structure according to claim 6 is characterized in that: The second bent steel sheet (22) is also provided with a first fixing groove (211), a second fixing groove (212), and a limiting steel sheet (213). The trough of the second bent steel sheet (213) is connected to the crest of the first bent steel sheet (21), and the limiting steel sheet (213) at the trough of the second bent steel sheet (22) passes through the first fixing groove (211) at the crest of the first bent steel sheet (21), and the limiting steel sheet (213) at the trough of the first bent steel sheet (21) passes through the first fixing groove (211) at the crest of the second bent steel sheet (22). All connections are welded, and a tortoise shell net (2) with a regular hexagonal grid structure is formed by connecting the crests and troughs of the first bent steel sheet (21) and the second bent steel sheet (22).

9. The novel double-chamber kiln lining structure according to claim 1 is characterized in that: A plurality of pads (8) are provided on one side of the upper limit steel sheet (213) of the tortoise shell net (2). The pads (8) are square structures with screw holes. The pads (8) are threadedly connected to the first anchor rod (3) and the second anchor rod (6) and then welded to form a T-shaped anchor.

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