A mesh belt dryer for refractory mortar

Abstract

The utility model discloses a web belt formula drying -machine for refractory mortar strip, including the box, the inside of box is provided with multilayer web belt, and the refractory mortar strip is along multilayer web belt and is dry to move, and the web belt is connected with the driving cylinder that it removes, and the opening that the both ends of driving cylinder project is set up respectively on the both sides lateral wall of box, one end of driving cylinder is connected with the motor and speed reducer that drive its rotation, and the other end of driving cylinder is connected with first support part, first support part and motor, speed reducer all are located the outside of box, the utility model has the beneficial effect for: on the basis of the structure and working principle of traditional belt conveyor are used for reference, cancel multilayer web belt drying -machine transmission part (chain link, chain plate, sprocket, roll sleeve), adopt cylinder and support wheel group drive. Make the equipment whole structure simple, and the wearing parts are few, and the cost is low.

Description

Technical Field

[0001] This utility model relates to the field of refractory material production and processing technology, and in particular to a mesh belt dryer for refractory clay strips. Background Technology

[0002] For a long time, multi-layer mesh belt dryers have been widely used in industries such as food, pharmaceuticals, electronics, and building materials due to their advantages of high output, uniform drying, and high degree of automation. They are particularly suitable for drying sheet-like, strip-like, and granular materials with good air permeability. In recent years, after modifications, multi-layer mesh belt dryers have begun to be introduced into the homogeneous refractory clinker production industry for drying the mud strips after filter cake formation. This not only significantly reduces the number of workers, lowers labor intensity, and improves the working environment, but also offers high output, good drying quality, and low drying costs, representing a major technological breakthrough and innovation in the industry.

[0003] The multi-layer mesh belt dryer for drying refractory clay strips is a continuous drying device. It has a rectangular, enclosed box shape and contains an odd number of mesh belts. It consists of a feed end, a discharge end, a heating system, a conveying system, an exhaust system, and a control system. The mesh belts are horizontally driven by chains, which are connected and fixed to the chains via chain rods and chain sleeves. The chains consist of chain plates, chain sleeves, and chain rollers. The clay strips are evenly distributed on the mesh belts. The strips enter from the upper feed end, are conveyed through each layer of mesh belts, and are discharged from the lower discharge end. The heat source for drying is the waste heat air from the kiln tail. The hot air continuously enters from the bottom of the lower mesh belt, passes through each layer of mesh belts, and finally exits from the top of the upper mesh belt.

[0004] Despite the numerous advantages of multi-layer mesh belt dryers and the many improvements made in recent years, the following defects and problems still exist: 1. Rapid wear of transmission components such as chain sleeves and sprockets. Because the transmission components are installed inside the dryer cavity, they operate for extended periods in high-temperature (around 320 degrees Celsius), high-dust (fine powder generated by friction between clay strips), high-humidity (around 30% moisture content in kiln tail gas), and high-corrosion (sulfur dioxide gas introduced by raw materials in kiln tail gas) environments, making them extremely prone to wear. Despite multiple optimizations to their materials and specifications, even using expensive 40CrMoTi alloy, their service life is still less than one year. Furthermore, wear of the chain sleeves and sprockets leads to the complete scrapping of transmission components such as chain rods and chain plates, resulting in high material consumption and operating costs.

[0005] 2. The maintenance work is extensive and time-consuming. During shutdown maintenance, the multiple layers of the conveyor belt must be dismantled and transported out from bottom to top; during installation, the conveyor belt must be installed from top to bottom, and the ends of all chain rods must be screwed to the chain sleeves, and all chain rods must be tied to the conveyor belt, resulting in a massive workload. If the dryer chamber length is 35 meters, the conveyor belt has 3 layers, and the chain rod spacing is 10 centimeters, then the total length of the conveyor belt is at least 210 meters, requiring the connection of 4200 chain rods and chain sleeves. Summary of the Invention

[0006] The purpose of this invention is to provide a mesh belt dryer for refractory clay strips, wherein all transmission components of the mesh belt are located outside the dryer housing, so that they do not come into direct contact with the waste heat and exhaust gas from the kiln tail and the clay strips.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A mesh belt dryer for refractory mortar strips includes a housing with multiple mesh belts inside. The refractory mortar strips move along the mesh belts for drying. The mesh belts are connected to a drive roller that drives their movement. Openings are provided on the two side walls of the housing for the two ends of the drive roller to extend out. One end of the drive roller is connected to a motor and a reducer that drive its rotation, and the other end of the drive roller is connected to a first support. The first support, the motor, and the reducer are all located outside the housing.

[0008] Preferably, the mesh belt is also connected to a driven roller arranged parallel to the driving roller, and openings are respectively provided on the two side walls of the box for the two ends of the driven roller to extend out. The two ends of the driven roller are respectively connected to a second support part, which is located outside the box.

[0009] Preferably, at least one set of support rollers is provided below the mesh belt, and openings are provided on the two side walls of the box for the two ends of the support rollers to extend out. The two ends of the support rollers are respectively connected to a third support part, which is located outside the box.

[0010] Preferably, both the driving roller and the driven roller are fitted with ceramic-coated plates.

[0011] Preferably, the side wall of the box is provided with a hot air inlet connected to the hot air inlet pipe, and the top of the box is provided with a hot air outlet pipe connected to the hot air inlet. The hot air flows sequentially along the hot air inlet pipe, the hot air inlet and the hot air outlet pipe to dry the refractory clay strips.

[0012] Preferably, the multi-layer mesh belt has a discharge end at its tail end, and the feed inlet at the head of the multi-layer mesh belt is connected to a material distributor, which is connected to a vacuum mud extruder.

[0013] Preferably, the device also includes a PLC electrical control cabinet for controlling the mesh belt speed, the material distributor, and the vacuum sludge extruder.

[0014] Preferably, the outer shell of the enclosure is made of a composite thermal insulation material, which includes a calcium silicate board, a fire-resistant felt, and a lightweight fire-resistant coating arranged sequentially from the outside to the inside.

[0015] The beneficial effects of this utility model are as follows: 1. Based on the structure and working principle of traditional belt conveyors, the transmission components (chain rods, chain plates, sprockets, roller sleeves) of the multi-layer mesh belt dryer are eliminated, and a roller and idler wheel assembly is used for transmission. This makes the overall structure of the equipment simple, with fewer vulnerable parts and lower cost.

[0016] 2. The support parts (i.e., bearing components) at both ends of the roller and support roller assembly are installed on the outside of both sides of the dryer, avoiding direct contact with the waste heat and exhaust gas from the kiln tail and the clay strips. This greatly improves the working environment of the transmission components and extends their service life. Simultaneously, it results in a low equipment failure rate, low operating costs, and high output.

[0017] 3. Fewer vulnerable parts, fewer maintenance items, simple repairs, and no production downtime required. Because the bearing components at both ends of the vulnerable rollers and support roller assemblies are installed on the outside of the dryer on both sides, maintenance is convenient. Furthermore, repairs are quick (generally around 30 minutes, while existing dryers require several days for repairs). Before repairs, a sufficient amount of drying mud strips can be reserved (enough for the next process within the repair timeframe). During repairs, the next process can continue operating without interruption. Attached Figure Description

[0018] Figure 1 This is the front view of this application (sectional view of the box section); Figure 2 This is a top view (section view of the box section) of this application. Figure 3 This is the left view of the present application (sectioned from the middle section of the box).

[0019] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. Detailed Implementation

[0020] The present invention will now be further described with reference to the accompanying drawings. Example

[0021] like Figure 1As shown in the figure, a mesh belt dryer for refractory mortar strips in this embodiment includes a box 1, which is rectangular and has a column-beam frame structure, enclosed by steel plates. Three layers of mesh belts are installed inside the box 1. The refractory mortar strips move sequentially on the three mesh belts 7 for drying. The arrows shown in the figure indicate the movement path of the refractory mortar strips; the top layer moves to the right (for ease of demonstration). Figure 1 Rotating 90° clockwise, when it reaches the rightmost end, it falls into the middle layer of the mesh belt and moves to the left under its influence. When it reaches the leftmost end, it falls into the bottom layer of the mesh belt and moves to the right, finally entering the next process along the discharge end 24 at the tail of the mesh belt. In this embodiment, the mesh belt 7 is made of 316 stainless steel alloy, with edge locking on both sides, a diamond-shaped mesh, and a wire diameter thickened to 3.5mm to withstand the horizontal tension. In specific implementation, the number of mesh belt layers can be freely set according to the length of the mesh belt and the specific drying process design.

[0022] like Figure 2 and Figure 3 As shown, the three-layer mesh belt is connected to a drive roller 4 that drives its movement. Openings are provided on both side walls of the housing 1 for the two ends of the drive roller 4 to extend out. One end of the drive roller 4 extends out of the opening and is connected to a motor 2 and a reducer 3 that drive its rotation. The motor 2 and reducer 3 drive the drive roller 4 to rotate via a belt and pulley. The other end of the drive roller 4 extends out of the opening and is connected to a first support (which has a bearing chamber installed inside to facilitate the rotation of the drive roller 4). The first support, its internal bearing chamber, motor 2, and reducer 3 are all located outside the housing 1, avoiding contact with the dry hot air and mud strips inside the housing 1, significantly improving its working environment and extending its service life. Removable sealing devices are provided at the openings of the housing 1 to prevent the hot air and mud strip residue inside from escaping outwards through the openings. This sealing device is a conventional technology and will not be described in detail in this embodiment.

[0023] The conveyor belt 7 is also connected to a driven roller 5 arranged parallel to the driving roller 4. Openings are provided on both side walls of the housing 1 for the driven roller 5 to extend from both ends. A second support portion supporting the rotation of the driven roller 5 is connected to both ends of the driven roller 5. The second support portion and its internal bearing components are located outside the housing 1. When the driving roller 4 and the driven roller 5 rotate, they drive the conveyor belt 7 to move by friction.

[0024] Below the mesh belt 7, there are also multiple support roller assemblies 6, which support the weight of the mesh belt 7 and the mud strips. Openings are provided on the two side walls of the box body 1 for the two ends of the support roller assemblies 6 to extend out. The two ends of the support roller assemblies 6 are respectively connected to the third support parts, and the third support parts and their internal bearing components are located outside the box body 1.

[0025] The structure of the driving roller 4 and the driven roller 5 is the same as that of existing ordinary rollers, and will not be described in detail in this embodiment. The driving roller 4 and the driven roller 5 are made of high-temperature and corrosion-resistant 304 stainless steel alloy, and ceramic coated plates 29 are installed on their surfaces to increase friction, which is beneficial for driving the mesh belt and avoiding slippage.

[0026] The side wall of the housing 1 is provided with multiple hot air inlets 23 that are connected to the hot air inlet duct 27. The top of the housing 1 is provided with a hot air outlet duct 28 that is connected to the hot air inlets 23. In this embodiment, the hot air is the waste heat air drawn from the tail gas of the kiln. It flows along the hot air inlet duct 27 and, after being scientifically distributed, enters the bottom of the housing 1 along each hot air inlet 23. Then it flows from bottom to top, passing through each layer of mesh belt and the refractory strips arranged on it in sequence to dry it. Finally, it enters the bag filter along the hot air outlet duct 28 and is discharged after dust removal.

[0027] The feed inlet 10 at the head of the multi-layer mesh belt 7 is connected to the distributor 22, which is connected to the vacuum extruder 21. The device also includes a PLC control cabinet 9, which controls the output of the distributor 22 and the vacuum extruder 21, and simultaneously controls the rotation speed of each layer of mesh belt 7 to match the output.

[0028] In this embodiment, the outer shell 25 is made of composite thermal insulation material 8, which includes a calcium silicate board 11, a fire-resistant felt 12, and a lightweight fire-resistant coating 13 arranged sequentially from the outside to the inside. Its main functions are thermal insulation and energy reduction.

[0029] During operation, the movement paths of the materials and hot air in this device are as follows: 1. The refractory clay strips fall directly from the outlet of the vacuum extruder 21 onto the distributor 22. After being distributed, they fall evenly from the feed inlet 10 of the dryer box 1 onto the upper mesh belt. After drying and transmission on the upper mesh belt, they are sent to the discharge end and fall onto the second mesh belt. This process continues until they fall onto the bottom mesh belt for drying. Finally, they are discharged from the discharge end 24 and sent to the tail of the kiln for firing.

[0030] 2. The waste heat air drawn from the kiln tail gas is scientifically distributed and sent to the bottom of the dryer through each hot air inlet 23. It enters from the bottom of the refractory clay strips of the lowest mesh belt, passes through the refractory clay strips of each mesh belt in sequence, and the air temperature drops from 320 degrees to about 120 degrees. Finally, it is discharged from the hot air outlet pipe 28 above the uppermost mesh belt and enters the bag filter. After dust removal, it is discharged into the air. Figure 3 The middle arrow indicates the path of the hot air.

[0031] This device draws on the principle and structure of existing belt conveyors, eliminating the chain plate transmission components (chain rod, chain plate, sprocket, roller sleeve), replacing the transmission sprocket with a belt-driven transmission drum, and the chain rod with a belt-driven idler assembly. The mesh belt is directly installed on the drum and idler assembly, and the transmission drum drives the mesh belt to rotate. Furthermore, the support parts (i.e., bearing chambers) at both ends of the transmission components drum and idler assembly are located on both sides of the outside of the dryer, and do not come into direct contact with the waste heat exhaust gas and clay strips at the kiln tail.

[0032] The above embodiments are not intended to limit the shape, material, structure, etc. of this utility model in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this utility model shall fall within the protection scope of this utility model.

[0033] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to facilitate the description of this utility model and to simplify the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model.

[0034] If the terms "first" or "second" are used in this document to define the components, those skilled in the art should know that the use of "first" or "second" is merely for the convenience of describing this utility model and simplifying the description, and unless otherwise stated, the above terms have no special meaning.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features. However, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A mesh belt dryer for refractory clay strips, comprising a housing, wherein multiple mesh belts are arranged inside the housing, and the refractory clay strips move along the multiple mesh belts for drying, characterized in that, The mesh belt is connected to an active roller that drives its movement. Openings are provided on the two side walls of the housing for the two ends of the active roller to extend out. One end of the active roller is connected to a motor and a reducer that drive its rotation, and the other end of the active roller is connected to a first support part. The first support part, the motor, and the reducer are all located outside the housing. Below the mesh belt, there is at least one set of support rollers. Openings are provided on the two side walls of the box for the two ends of the support rollers to extend out. The two ends of the support rollers are connected to a third support part, which is located outside the box.

2. A mesh belt dryer for refractory clay strips according to claim 1, characterized in that, The mesh belt is also connected to a driven roller arranged parallel to the driving roller. Openings are provided on the two side walls of the box for the two ends of the driven roller to extend out. The two ends of the driven roller are respectively connected to a second support part, which is located outside the box.

3. A mesh belt dryer for refractory clay strips according to claim 2, characterized in that, Both the driving roller and the driven roller are covered with ceramic-coated plates.

4. A mesh belt dryer for refractory clay strips according to claim 1, characterized in that, The side wall of the box is provided with a hot air inlet connected to the hot air inlet pipe, and the top of the box is provided with a hot air outlet pipe connected to the hot air inlet. Hot air flows sequentially along the hot air inlet pipe, the hot air outlet pipe and the hot air outlet pipe to dry the refractory clay strips.

5. A mesh belt dryer for refractory clay strips according to claim 1, characterized in that, The multi-layer mesh belt has a discharge end at its tail end, and the feed inlet at the head of the multi-layer mesh belt is connected to a material distributor, which is connected to a vacuum mud extruder.

6. A mesh belt dryer for refractory clay strips according to claim 5, characterized in that, It also includes a PLC electrical control cabinet for controlling the speed of the conveyor belt, the material distributor, and the vacuum sludge extruder.

7. A mesh belt dryer for refractory clay strips according to claim 1, characterized in that, The outer shell of the enclosure is made of composite thermal insulation material, which includes calcium silicate board, fire-resistant felt and lightweight fire-resistant coating material arranged sequentially from the outside to the inside.

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