Kiln tail guard plate structure

Abstract

The utility model relates to the technical field of solid hazardous article incineration treatment, and discloses a kiln tail guard plate structure which comprises a rotary kiln cylinder, a kiln tail guard plate is arranged outside the rotary kiln cylinder, rib plates extending outwards are arranged on the kiln tail guard plate, the extension direction of the rib plates is the radial direction of the rotary kiln cylinder, and the rib plates are vertically arranged. A through hole for mounting an anchoring part is formed in the rib plate, and the anchoring part in the through hole is parallel to the tangent line of the rotary kiln cylinder; the technical problem that in the prior art, a castable anchoring part is welded and fixed to a plane structure of a kiln tail protection plate, and consequently castable is prone to falling off is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of solid dangerous goods incineration treatment, in particular to a kiln tail guard plate structure. Background Art

[0002] The rotary kiln in the hazardous waste incineration treatment system is a cylindrical device placed horizontally or tilted. Through its rotating motion, the hazardous waste is evenly heated and mixed in the kiln, thereby achieving high-temperature incineration treatment. This makes the kiln tail area bear the direct erosion of high-temperature flue gas. In order to avoid deformation and burning of the kiln tail guard plate, the existing technology uses anchors for pouring refractory materials to be fixed on the plane structure of the kiln tail guard plate by welding, which serves as the support basis for the subsequent refractory castable layer, and then forms and pours refractory materials on the anchors to form a barrier to protect the kiln tail structure from high temperature and corrosive gas erosion. During use, corrosive waste and high-temperature flue gas will not directly contact the plate surface of the tail guard steel plate, thereby avoiding corrosion and burning of the tail guard steel plate.

[0003] However, in actual operation, castables around the kiln tail guard plate have repeatedly fallen off. The plane structure of the kiln tail guard plate and the welds between it and the castable anchors are very likely to suffer fatigue damage under the combined effects of high temperature and frequent thermal strain, leading to weld cracking, which in turn weakens the anchor's stabilizing effect on the castable. The kiln tail castable itself has a heavy mass, and during the continuous rotation of the rotary kiln, it will generate significant centrifugal force. This centrifugal force will aggravate the relative displacement between the castable and the anchor and guard plate over a long period of time, accelerating the loosening and falling of the castable. As a concentrated area of ​​high-temperature thermal strain, the kiln tail area will be affected by the castable's internal structure and the bonding strength with the anchor and guard plate after experiencing multiple drastic temperature changes, further promoting the falling of the castable. The falling of the castable makes the kiln tail guard plate directly exposed to the high-temperature flue gas containing corrosive components, affecting the stability and service life of the entire kiln tail structure, and posing a potential threat to the safe operation of the entire incineration system. Utility Model Content

[0004] The utility model aims to provide a kiln tail guard plate structure to solve the technical problem in the prior art that the castable anchor pieces are welded and fixed on the plane structure of the kiln tail guard plate, causing the castable to fall off easily.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a kiln tail guard plate structure, including a rotary kiln cylinder, a kiln tail guard plate is arranged outside the rotary kiln cylinder, the kiln tail guard plate is provided with a rib plate extending outward, the extension direction of the rib plate is the radial direction of the rotary kiln cylinder, and the rib plate is vertically arranged; the rib plate is provided with a through hole for installing an anchor, and the anchor in the through hole is parallel to the tangent of the rotary kiln cylinder.

[0006] The principles and advantages of this solution are: in actual application, the anchor penetrates the through hole, and the side wall of the anchor is filled and welded with the inside of the through hole, avoiding the defect that the tail end of the anchor is directly welded to the plane structure of the kiln tail guard plate, reducing the number of welds, and enhancing the connection reliability between the castable anchor and the kiln tail guard plate by the physical connection structure to prevent the castable from loosening and falling off; and the rib plate structure not only serves as a fixing point for installing the anchor, but also effectively enhances the overall rigidity and load-bearing capacity of the kiln tail guard plate, reducing deformation and damage due to high temperature and centrifugal force.

[0007] As an improvement, the diameter of the through hole is larger than the diameter of the anchor.

[0008] The beneficial effect of this improvement is that the aperture of the through hole is designed to be slightly larger than the diameter of the anchor, providing appropriate room for movement for the thermal strain of the anchor at high temperature; this enables the anchor to expand and contract freely during thermal expansion and contraction, avoiding irreversible deformation and weld cracking caused by stress concentration.

[0009] As an improvement, a support plate extending outward is further provided on the kiln tail guard plate, the support plate is arranged horizontally, and the support plate is integrally connected to the upper end surface of the rib plate.

[0010] The beneficial effects of this improvement are: the addition of the support plate significantly enhances the horizontal support capacity of the kiln tail guard plate; since the support plate and the rib plate are integrally connected, a more stable support structure is formed, which can withstand greater centrifugal force and load, and effectively prevent the castable from loosening and falling off due to the centrifugal force during the rotation of the rotary kiln; the support plate and the rib plate together form a T-shaped or similar reinforced structure, which is more stable in mechanics and can effectively resist the influence of external stress and deformation.

[0011] As an improvement, one end of the kiln tail guard plate away from the rib plate is bent inward so that the two ends of the kiln tail guard plate are parallel, and the connecting end of the rotary kiln cylinder is clamped and fixed between the two parallel ends of the kiln tail guard plate, and a fixing piece is provided that passes through the kiln tail guard plate and the rotary kiln cylinder in sequence.

[0012] The beneficial effect of this improvement is that the connection strength between the rotary kiln cylinder and the kiln tail guard plate is significantly enhanced by clamping the connecting end of the rotary kiln cylinder between the two parallel ends of the kiln tail guard plate and fastening them with fixing parts such as bolts and pins. This clamping and fixing method is more stable than traditional welding or a single connection point and can withstand greater tension and shear force. During the rotation of the rotary kiln, the structure can effectively resist deformation and vibration caused by external factors such as centrifugal force and thermal stress.

[0013] As an improvement, there are multiple rib plates and support plates, and the multiple rib plates and support plates are symmetrically distributed along the circumferential center of the rotary kiln cylinder.

[0014] The beneficial effect of this improvement is that multiple ribs and support plates are symmetrically distributed along the circumference of the rotary kiln shell, so that when the kiln tail guard plate is subjected to the pressure from the waste and high-temperature flue gas in the kiln, these forces can be evenly dispersed to each rib and support plate. This balanced force can effectively reduce the local stress concentration phenomenon and reduce the risk of fatigue damage and cracking caused by uneven stress.

[0015] As an improvement, there are multiple through holes on the rib plate.

[0016] The beneficial effects of this improvement are: increasing the anchor points between the castable and the kiln tail guard plate, more evenly distributing the weight and force of the castable, thereby enhancing the stability of the castable layer and reducing the risk of falling off due to local stress concentration.

[0017] As an improvement, a steel frame is constructed outside the kiln tail guard plate, and holes for the steel bars to pass through are provided on the support plate.

[0018] The beneficial effect of this improvement is that the close connection between the steel skeleton, the kiln tail guard plate and the castable material helps to evenly distribute and transfer thermal strain; this can reduce thermal deformation and cracking problems caused by uneven thermal stress and improve the stability of the kiln tail guard plate in high temperature environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a cross-sectional view of a rotary kiln.

[0020] Figure 2 This is a schematic diagram of the structure of the kiln tail guard plate. DETAILED DESCRIPTION

[0021] The following is further described in detail through specific implementation methods:

[0022] The reference numerals in the drawings of the specification include: rotary kiln cylinder 1, kiln tail guard plate 2, rib plate 3, support plate 4, through hole 5, vertical part 6, bent part 7, bolt 8, steel bar 9, castable 10 and rake nail 11.

[0023] Example

[0024] Attached Figure 1 Cut along the rotation center line of the rotary kiln, basically as shown in the attached Figure 1 As shown, a kiln tail guard plate structure comprises a rotary kiln cylinder 1, a kiln tail guard plate 2 is arranged outside the rotary kiln cylinder 1, and a rib plate 3 extending outward is arranged on the kiln tail guard plate 2, the rib plate 3 extends in the radial direction of the rotary kiln cylinder 1, and the rib plate 3 is arranged vertically. The kiln tail guard plate 2 is also provided with a support plate 4 extending outward; as shown in the attached Figure 2As shown, the support plate 4 is horizontally arranged, and the support plate 4 and the upper end surface of the rib plate 3, the support plate 4, the rib plate 3 and the kiln tail guard plate 2 are integrally formed, so that the support plate 4 and the rib plate 3 are T-shaped, and the load-bearing capacity of the support plate 4 is enhanced by the rib plate 3. There are multiple rib plates 3 and support plates 4, and the multiple rib plates 3 and support plates 4 are symmetrically distributed along the circumferential center of the rotary kiln cylinder 1.

[0025] The rib plate 3 is provided with a through hole 5 for installing an anchor, and the anchor in the through hole 5 is parallel to the tangent of the rotary kiln cylinder 1. The aperture of the through hole 5 is larger than the diameter of the anchor. There are two through holes 5 on the rib plate 3, which can be used for two anchors to be installed on the rib plate 3. The anchor passes through the through hole 5, and the side wall of the anchor is filled and welded with the inside of the through hole 5, which avoids the tail end of the anchor being directly welded to the plane structure of the kiln tail guard plate 2. The physical connection structure enhances the connection reliability between the castable anchor and the kiln tail guard plate 2, and the through hole 5 is provided with a compensating strain for the anchor to move appropriately when the anchor is thermally strained at high temperature, so as to avoid irreversible deformation at the connection between the anchor and the rib plate 3.

[0026] The kiln tail guard plate 2 includes a vertical portion 6 and a bent portion 7, the rib plate 3 and the support plate 4 are located on the vertical portion 6 of the kiln tail guard plate 2, the bent portion 7 is located below the vertical portion 6, one end of the bent portion 7 is fixedly connected to the vertical portion 6, and the other end of the bent portion 7 is bent inward and upward toward the center of the rotary kiln cylinder 1, so that the bent portion 7 of the kiln tail guard plate 2 is a 180° turn, the end of the bent portion 7 is parallel to the vertical portion 6, and the length of the parallel section of the bent portion 7 and the vertical portion 6, that is, the length of the vertical portion 6, the connecting end of the rotary kiln cylinder 1 is located between the parallel section of the bent portion 7 and the vertical portion 6, and the bolt 8 passes through the bent portion 7-rotor kiln cylinder 1-vertical portion 6 in sequence, and the rotary kiln cylinder 1 is clamped and fixed between the kiln tail guard plate 2, so that the shear force generated on the bolt 8 shares part of the weight of the kiln tail guard plate 2, thereby improving the stability of the structure of the kiln tail guard plate 2. Holes for bolts 8 to pass through to fix the rotary kiln shell 1 and the kiln tail guard plate 2 are symmetrically arranged on both sides of the rib plate 3 .

[0027] A steel bar frame is built outside the kiln tail guard plate 2, and holes are provided on the support plate 4 for the steel bars 9 to pass through. Casting material 10 is poured outside the kiln tail guard plate 2, and the casting material 10 completely wraps the outer side of the kiln tail guard plate 2 and extends to the bottom of the rotary kiln cylinder 1. A rake nail 11 wrapped by the casting material 10 is also provided on the inner side of the kiln tail guard plate 2 below the rotary kiln cylinder 1.

[0028] By optimizing the structural design and connection method, the number of welds is reduced, and the risk of castable 10 falling off due to weld cracking is reduced, thereby improving the overall durability and service life of the kiln tail guard plate 2 structure; the design of the T-shaped structure and the clamping connection between the rotary kiln cylinder 1 and the guard plate significantly enhance the stability of the guard plate and the entire incineration system; the complete wrapping of the castable 10 and the setting of the rake nails 11 effectively isolate the guard plate from the erosion of high temperature and corrosive gases, protect the guard plate from damage, and also ensure the safe operation of the incineration system.

[0029] The above is only an embodiment of the utility model, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the utility model, several deformations and improvements can be made, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A kiln tail guard plate structure, comprising a rotary kiln cylinder, a kiln tail guard plate is arranged outside the rotary kiln cylinder, and is characterized in that: The kiln tail guard plate is provided with a rib plate extending outward, the extension direction of the rib plate is the radial direction of the rotary kiln cylinder, and the rib plate is vertically arranged; the rib plate is provided with a through hole for installing an anchor, and the anchor in the through hole is parallel to the tangent of the rotary kiln cylinder.

2. A kiln tail guard plate structure according to claim 1, characterized in that: The diameter of the through hole is larger than the diameter of the anchor.

3. A kiln tail guard plate structure according to claim 2, characterized in that: The kiln tail guard plate is also provided with a support plate extending outward, the support plate is arranged horizontally, and the support plate is integrally connected with the upper end surface of the rib plate.

4. A kiln tail guard plate structure according to claim 3, characterized in that: The end of the kiln tail guard plate away from the rib plate is bent inward so that the two ends of the kiln tail guard plate are parallel, and the connecting end of the rotary kiln cylinder is clamped and fixed between the two parallel ends of the kiln tail guard plate, and a fixing piece is provided to pass through the kiln tail guard plate and the rotary kiln cylinder in sequence.

5. A kiln tail guard plate structure according to claim 4, characterized in that: There are multiple rib plates and support plates, and the multiple rib plates and support plates are symmetrically distributed along the circumferential center of the rotary kiln cylinder.

6. A kiln tail guard plate structure according to claim 5, characterized in that: The number of the through holes on the rib plate is multiple.

7. A kiln tail guard plate structure according to claim 6, characterized in that: A steel frame is constructed outside the kiln tail guard plate, and holes for the steel bars to pass through are arranged on the support plate.

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