Double-hearth lime kiln with combined type loading area kiln hearth structure

Abstract

The utility model relates to a double-hearth lime kiln with a combined loading area kiln hearth structure, which comprises a lower hearth, a loading area furnace shell is fixed at the top end of the lower hearth, a plurality of groups of fixed steel sheets are arranged on the inner surface of the loading area furnace shell, and the inner surface of the loading area furnace shell is filled with refractory materials. A wear-resisting steel plate is fixed to the end, away from the furnace shell, of the fixed steel sheet, a feeding port area is fixed to the top end of the furnace shell, a feeding port is formed in the top end of the feeding port area, and an anchoring part is welded to the inner wall of the furnace shell in the feeding port area and smeared with smearing materials. According to the double-hearth lime kiln with the combined loading area kiln hearth structure, the temperature of the loading area is not very high, so that the wear-resistant steel plate can bear impact and friction of limestone and can also bear the temperature of the loading area; the refractory material filled in the gap plays a role in heat insulation and can ensure that the furnace shell is not deformed due to heat, the fixed steel sheet plays a role in fixing the wear-resistant steel plate, and meanwhile, the gap between the wear-resistant steel plate and the furnace shell is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of kiln equipment, in particular to a double-chamber lime kiln with a combined charging area kiln chamber structure. Background Art

[0002] The double-chamber lime kiln includes two adjacent lime kiln chambers; each lime kiln chamber includes a charging area, a preheating area, a calcining area, and a cooling area from top to bottom; the upper part of the kiln chamber charging area is the charging port area, the kiln chamber top sealing mechanism, the limestone loader, the limestone silo, the limestone weighing mechanism, the limestone charging mechanism, the furnace top air duct, the furnace top flue, the dust collector and the working platform.

[0003] The kiln chamber in the charging area consists of two parts from the outside to the inside: the furnace shell and the working layer. The furnace shell is a steel outer shell and is the metal structure of the kiln chamber. The working layer is the part that directly faces the impact and friction of limestone, and plays a role in protecting the furnace shell from the impact of limestone, isolating the temperature and preventing the furnace shell from being deformed by heat.

[0004] The traditional working layer of the charging area is composed of refractory spray paint or coating material, and its construction process is: 1) clean the inner surface of the kiln shell in the charging area; 2) weld V-shaped stainless steel anchors on the inner surface of the furnace shell; 3) use a sprayer to spray the refractory spray paint on the inner surface of the furnace shell, or manually apply the coating material on the inner surface of the furnace shell to form a working layer.

[0005] The hardness of the spray paint or coating used in this traditional working layer is limited. Therefore, under the repeated and long-term impact and friction of limestone, it will be worn away and disappear in about 3 months. The furnace shell of the charging area will bear the direct impact and friction of limestone and the temperature of hot air, which will damage the furnace shell of the charging area of ​​the lime kiln, and then endanger the overall structure of the lime kiln, and bring danger to the mechanical equipment and working platform above the charging area; the lime kiln is a large-scale high-temperature kiln with continuous production. Every shutdown for inspection and maintenance will cause great damage to the refractory lining, which in turn limits the maintenance of the working layer of the charging area during shutdown; based on this, a double-chamber lime kiln with a combined charging area kiln chamber structure is proposed. By adopting a combined kiln chamber structure in the charging area, the problem that the working layer of the charging area will be worn through by limestone in 3 months is solved, and its one-time service life can reach more than 3 years. Utility Model Content

[0006] In view of the deficiencies in the prior art, the utility model provides a double-chamber lime kiln with a combined charging area kiln chamber structure, which has the advantages of improving the wear resistance of the working layer in the charging area and solving the problem of the non-wear resistance of the working layer in the charging area.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a double-chamber lime kiln with a combined charging area kiln chamber structure, comprising a lower furnace chamber, a charging area furnace shell is fixed to the top of the lower furnace chamber, the inner surface of the charging area furnace shell is provided with multiple groups of fixed steel sheets, the inner surface of the charging area furnace shell is filled with refractory materials, a wear-resistant steel plate is fixed to one end of the fixed steel sheet away from the furnace shell, a charging port area is fixed to the top of the charging area furnace shell, and a feed port is opened at the top of the charging port area.

[0008] Furthermore, the wear-resistant steel plate is fixed to the inner surface of the furnace shell, and its welding thickness is 5-100 mm.

[0009] Furthermore, a gap of 10-100 mm is maintained between the wear-resistant steel plate and the furnace shell, and a fixed steel sheet is welded in the gap, wherein one end of the fixed steel sheet is welded to the inner wall of the furnace shell and the other end is welded to the wear-resistant steel plate.

[0010] Furthermore, the refractory material is filled in the gap, and the refractory material includes one or more of lightweight insulation bricks, rock wool, aluminum silicate fiber wool, glass fiber wool, calcium silicate insulation material or nanoplate insulation material.

[0011] Furthermore, anchors are welded to the inner wall of the furnace shell in the charging port area and smeared with coating material.

[0012] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0013] The double-chamber lime kiln with a combined charging area kiln chamber structure adopts wear-resistant steel plates to withstand the impact and friction of limestone as well as the temperature of the charging area, because the temperature of the charging area is not very high; the material filled in the gap plays a heat-insulating role to ensure that the furnace shell is not deformed by heat, and the fixed steel sheet plays a role in fixing the wear-resistant steel plate and ensures the gap between the wear-resistant steel plate and the furnace shell; the charging port area does not withstand the impact of limestone, so it is still coated with coating material.

[0014] Since the working layer of the charging area is wear-resistant and durable, it effectively protects the stability of the steel furnace shell structure of the charging area, as well as the stability of various equipment and working platforms on the upper part of the charging area, significantly improving the overall structural stability of the double-chamber lime kiln and improving the safety of operation.

[0015] Due to the high hardness and strong wear resistance of the wear-resistant steel plate, the service life of this combined loading area kiln structure is more than 3 years, which reduces the number of times the lime kiln is shut down to repair the working layer of the loading area, reduces the damage to the refractory lining of the kiln preheating area, calcining area and cooling area caused by frequent shutdowns, increases the continuous production time of the lime kiln, and improves the utilization efficiency of the high-temperature kiln. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 For this utility model Figure 1 Schematic diagram of the enlarged structure at point A in the middle.

[0018] In the figure: 1 lower furnace, 2 furnace shell in charging area, 3 fixed steel sheet, 4 refractory material, 5 wear-resistant steel plate, 6 furnace shell in feed port area, 7 coating material, 8 feed port. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1 and Figure 2 In this embodiment, a double-chamber lime kiln with a combined charging zone kiln chamber structure includes a lower furnace chamber 1, a charging zone furnace shell 2 is fixed on the top of the lower furnace chamber 1, a plurality of fixed steel sheets 3 are provided on the inner surface of the charging zone furnace shell 2, a refractory material 4 is filled on the inner surface of the charging zone furnace shell 2, and the refractory material 4 is filled in the gap. The refractory material 4 includes one or more of lightweight insulation bricks, rock wool, aluminum silicate fiber wool, glass fiber wool, calcium silicate insulation material or nano plate insulation material. The fixed steel sheet 3 is away from the charging zone furnace. A wear-resistant steel plate 5 is fixed to one end of the shell 2, and the wear-resistant steel plate 5 is fixed to the inner surface of the furnace shell 2, and its welding thickness is 5-100mm. A gap of 10-100mm is maintained between the wear-resistant steel plate 5 and the furnace shell 2, and a fixed steel sheet 3 is welded in the gap, and one end of the fixed steel sheet 3 is welded to the inner wall of the furnace shell 2, and the other end is welded to the wear-resistant steel plate 5. A feed port area furnace shell 6 is fixed to the top of the furnace shell 2, and a feed port 8 is opened at the top of the feed port area. Anchors are welded to the inner wall of the furnace shell 6 in the feed port area and coated with coating material 7.

[0021] Embodiment 1:

[0022] Clean the inner surface of the furnace shell 2 in the charging area;

[0023] Weld and fix the steel sheet 3 on the inner surface of the furnace shell 2 in the charging area;

[0024] The wear-resistant steel plate 5 is welded to the fixed steel plate 3, and the wear-resistant steel plates 5 are also welded tightly to each other without leaving any horizontal or vertical seams;

[0025] Fill the gap between the wear-resistant steel plate 5 and the furnace shell 2 with refractory material 4;

[0026] Repeat the above steps to completely cover the inner surface of the furnace shell 2 in the charging area with the working layer of the above structure;

[0027] Anchors are welded to the inner wall of the furnace shell 6 in the feed inlet area and a coating material 7 is applied.

[0028] Embodiment 2:

[0029] Clean the inner surface of the furnace shell 2 in the charging area;

[0030] Weld and fix the steel sheet 3 on the inner surface of the furnace shell 2 in the charging area;

[0031] The refractory material 4 is compounded on the outer surface of the wear-resistant steel plate 5 by anchoring, screwing, pasting, painting, etc.;

[0032] The wear-resistant steel plate 5 is welded to the fixed steel sheet 3, and the side of the wear-resistant steel plate 5 with the refractory material 4 is close to the steel furnace shell 2. The wear-resistant steel plates 5 are welded tightly to each other without any horizontal or vertical seams;

[0033] Repeat the above steps to completely cover the inner surface of the furnace shell 2 in the charging area with the working layer of the above structure;

[0034] Anchors are welded to the inner wall of the furnace shell 6 in the feed inlet area and a coating material 7 is applied.

[0035] Embodiment three:

[0036] Clean the inner surface of the furnace shell 2 in the charging area;

[0037] Welding and fixing the steel sheet 3 on the wear-resistant steel plate 5;

[0038] The wear-resistant steel plates 5 are welded to the furnace shell 2 in the charging area through the fixing steel sheets 3. The wear-resistant steel plates 5 are also welded tightly to each other without any horizontal or vertical seams.

[0039] Fill the gap between the wear-resistant steel plate 5 and the furnace shell 2 with refractory material 4;

[0040] Repeat the above steps to completely cover the inner surface of the furnace shell 2 in the charging area with the working layer of the above structure;

[0041] Anchors are welded to the inner wall of the furnace shell 6 in the feed inlet area and a coating material 7 is applied.

[0042] Embodiment 4:

[0043] Clean the inner surface of the furnace shell 2 in the charging area;

[0044] Welding and fixing the steel sheet 3 on the wear-resistant steel plate 5;

[0045] The refractory material 4 is compounded on the outer surface of the wear-resistant steel plate 5 by anchoring, screwing, pasting, painting, etc.;

[0046] The wear-resistant steel plate 5 is welded to the furnace shell 2 in the charging area through the fixed steel sheet 3. The side of the wear-resistant steel plate 5 with the refractory material 4 is close to the steel furnace shell 2. The wear-resistant steel plates 5 are welded tightly to each other without any horizontal or vertical seams.

[0047] Repeat the above steps to completely cover the inner surface of the furnace shell 2 in the charging area with the working layer of the above structure;

[0048] Anchors are welded to the inner wall of the furnace shell 6 in the feed inlet area and a coating material 7 is applied.

[0049] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0050] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A double-chamber lime kiln with a combined charging zone kiln chamber structure, comprising a lower furnace chamber (1), characterized in that: A charging area furnace shell (2) is fixed to the top of the lower furnace (1), and a plurality of groups of fixed steel sheets (3) are provided on the inner surface of the charging area furnace shell (2). The inner surface of the charging area furnace shell (2) is filled with refractory material (4), and a wear-resistant steel plate (5) is fixed to one end of the fixed steel sheet (3) away from the charging area furnace shell (2). A feed port area furnace shell (6) is fixed to the top of the charging area furnace shell (2), and a feed port (8) is provided at the top of the feed port area.

2. A double-chamber lime kiln with a combined charging zone kiln chamber structure according to claim 1, characterized in that: The wear-resistant steel plate (5) is fixed to the inner surface of the furnace shell (2) in the charging area, and its welding thickness is 5-100 mm.

3. A double-chamber lime kiln with a combined charging zone kiln chamber structure according to claim 1, characterized in that: A gap of 10-100 mm is maintained between the wear-resistant steel plate (5) and the furnace shell (2) in the charging area, and a fixed steel sheet (3) is welded in the gap. One end of the fixed steel sheet (3) is welded to the inner wall of the furnace shell (2) in the charging area, and the other end is welded to the wear-resistant steel plate (5).

4. A double-chamber lime kiln with a combined charging zone kiln chamber structure according to claim 3, characterized in that: The refractory material (4) is filled in the gap.

5. A double-chamber lime kiln with a combined charging zone kiln chamber structure according to claim 1, characterized in that: Anchors are first welded to the inner wall of the furnace shell (6) in the feed inlet area, and then a layer of coating material (7) is applied.

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