Multi-stage rotary kiln fish scale sealing device

Abstract

The utility model discloses a multistage rotary kiln fish scale sealing device, which relates to the field of rotary kiln sealing and comprises a combustion chamber, the combustion chamber adopts a ceramic fiber module shell, a rotary kiln body is arranged on one side of the combustion chamber, and a static sealing seat is arranged on one side of the combustion chamber and located on the outer side of the rotary kiln body. A static sealing seat is arranged on the rotary kiln body, fish scales are arranged on one side of the static sealing seat and comprise a middle aluminum carbonate fiber board, an outer fish scale on the outer side and an inner fish scale on the inner side, the fish scales are fixed to the static sealing seat through fish scale fixing bolts, and a movable sealing seat is arranged on the outer side of the rotary kiln body. And the other side of the fish scale is propped against the movable sealing seat in a sliding manner. After high-temperature flue gas passes through a four-stage sealing structure of the refractory retaining wall, the gap between the rotary kiln body and the ceramic fiber module, the sealing fiber rope and the fish scale, the escape possibility of the high-temperature flue gas is greatly reduced, the performance of the rotary kiln device is optimized, and the practicability and durability are improved.

Description

Technical Field

[0001] The utility model relates to the field of rotary kiln seals, and more specifically to a multi-stage rotary kiln fish scale seal device. Background Art

[0002] Activated carbon is a kind of microcrystalline carbon material mainly made of carbon-containing materials, with a black appearance, developed internal pore structure, large specific surface area, and strong adsorption capacity. It is an excellent adsorbent. It has the dual characteristics of physical adsorption and chemical adsorption, and can selectively adsorb various substances in the gas phase and liquid phase to achieve purposes such as decolorization and refinement, disinfection and deodorization, and decontamination and purification. There are a large number of micro pores invisible to the naked eye in the activated carbon material. It is precisely these highly developed pore structures like human capillaries that endow activated carbon with excellent adsorption performance. Based on the rich internal pore structure and excellent adsorption capacity of activated carbon, activated carbon has been widely used in all aspects of industrial and agricultural production. For example, in the chemical industry, chemical catalysts and carriers, gas purification, solvent recovery, etc.; in the petrochemical industry, natural gas purification, desulfurization, deodorization, etc.; in the power industry, power plant water treatment and protection; in the food industry, food refinement and decolorization; in the fine chemical industry, pharmaceutical chemical industry, and product purification, refinement, decolorization, and filtration in the process of biopharmaceuticals; in the environmental protection industry, sewage treatment, treatment of harmful gases, gas purification, etc. Activated carbon has excellent development prospects and a broad sales market in the future.

[0003] There are many methods for preparing activated carbon. For waste activated carbon, the high-temperature flue gas generated by hazardous waste combustion can be used to provide energy for the regeneration of waste activated carbon. At the same time, the steam generated by the waste heat boiler can provide a reducing atmosphere for the regeneration process of waste activated carbon. This method not only effectively solves the common secondary pollution problem in the process of activated carbon regeneration, but also effectively reduces the regeneration cost, with good economy and environmental protection. During the process of regenerating activated carbon by using hazardous waste combustion, the rotary kiln is a continuously rotating furnace with a high temperature inside. During operation, in order to ensure the isolation of the flue gas inside the furnace from the outside world so that the high-temperature flue gas in the rotary kiln can be fully utilized, the sealing device of the rotary kiln is particularly important. At the same time, since the combustion chamber is a fixed device and the rotary kiln is a rotating device, there is a certain gap between the outlet of the combustion chamber and the rotary kiln. In order to ensure factors such as high-temperature expansion during the operation of the rotary kiln, the gap is basically controlled between 20 - 25 mm. This gap will transfer the heat in the combustion chamber to the outside of the kiln body, causing damage to the kiln body, etc. At the same time, some external impurities may enter the rotary kiln through the gap, making impurities mixed into the reaction system, which may reduce the product purity or affect the product yield. Therefore, in order to ensure the service life of the rotary kiln device and the purity, yield, and performance of the activated carbon product, the sealing performance of the rotary kiln device is particularly important.

[0004] The rotary kiln sealing device currently in circulation and use on the market mainly seals the rotary kiln device by adding a layer of fish scales at the port of the rotary kiln. The sealing effect of this device is poor. A part of the high-temperature flue gas in the rotary kiln fails to be transferred to the reaction furnace to provide the heat required during the activated carbon regeneration process, but directly escapes from the gap of the rotary kiln. Therefore, the utilization rate of raw materials is weakened to a certain extent. At the same time, the escaping high-temperature flue gas will cause irreversible damage to the rotary kiln and even the entire reaction device, reducing the service life of the device. Therefore, there is an urgent need to develop and invent a new type of rotary kiln sealing device with better sealing performance, lower device cost, longer service life, and higher activated carbon production rate performance.

[0005] The patent document with the patent application number CN202221878383.9 discloses a kiln mouth sealing device for a rotary kiln, including a limit component and a steel wire rope arranged on the fish scale plate. The end of the steel wire rope extends outward and is connected to an electric tensioning device. The electric tensioning device is installed on a bracket, and a controller connected to the electric tensioning device is also provided on the bracket; the controller is also electrically connected to a number of pressure sensors, and the pressure sensors are arranged at the end face where the limit rod abuts against the fish scale plate. This kiln mouth sealing device has a good sealing effect by installing a section of airtight kiln head cover at the kiln mouth position, covering the kiln mouth inside, and installing the fish scale seal at the end of the cover. There is no dust emission at the kiln head under positive pressure, creating a good on-site working environment. Moreover, the tension adjustment of the fish scale plate and the steel wire rope is convenient, accurate, time-saving, and labor-saving. However, this device only mainly improves the fish scale seal structure and does not comprehensively consider the overall structure of the rotary kiln, resulting in a possible suboptimal sealing effect of the rotary kiln device.

[0006] The patent document with the patent application number CN202021880605.1 discloses a wear-resistant scale-type sealing structure for a rotary kiln, including a rotary kiln cylinder body. A front end plate is provided at the front end of the rotary kiln cylinder body, a slag collection box is provided at the rear end of the rotary kiln cylinder body, a dust-proof cover is provided at the top of the slag collection box, the dust-proof cover includes a fixed cover, and a movable cover is movably sleeved outside the fixed cover. A fish scale sealing ring is provided between the slag collection box and the rotary kiln cylinder body, and a wear-resistant lining ring is provided between the fish scale sealing ring and the rotary kiln cylinder body. This wear-resistant scale-type sealing structure for a rotary kiln can reduce the wear of the fish scales, thereby extending the service life of the fish scales and ensuring the sealing effect; at the same time, it can effectively prevent dust from flying, avoid air pollution, and can be opened at any time to check the slag discharge situation, which is convenient to use. However, this device mainly considers the wear situation of the fish scales. Relying solely on the improved fish scale seal structure cannot well improve the sealing effect of the rotary kiln cylinder body. This device does not comprehensively consider the overall sealing effect of the rotary kiln.

[0007] The patent document with the patent application number CN202221878383.9 provides a rotary kiln sealing structure with better sealing effect to solve the problems of air leakage in the rotary kiln and easy entry of impurities into the cylinder body, and relates to the technical field of rotary kiln sealing. The rotary kiln sealing structure includes a cylinder body and a kiln hood that cooperates with the end of the cylinder body. An overlapping scale sealing structure and a labyrinth sealing structure are sequentially arranged between the cylinder body and the kiln hood. The overlapping scale sealing structure includes multiple sealing scale pieces that are sequentially overlapped around the cylinder body. One end of the sealing scale piece is connected to the kiln hood, and the other end is in contact with and seals the cylinder body. A spring that presses the sealing scale piece against the cylinder body is arranged between the sealing scale piece and the kiln hood. One end of the spring is connected to the sealing scale piece, and the other end is connected to the kiln hood. However, the sealing structure designed by this device has a poor improvement effect on the sealing performance of flue gas, and still a part of the high-temperature flue gas will escape through the gaps of the rotary kiln. The overall sealing effect of the rotary kiln by this device is not comprehensively considered. Utility Model Content

[0008] The purpose of the present utility model is to design a multi-stage rotary kiln overlapping scale sealing device aiming at the current situation and deficiencies of the rotary kiln sealing device technology in the prior art, to achieve a better sealing effect and a longer service life, so as to overcome the deficiencies such as poor sealing performance and short service life of the existing rotary kiln sealing technology.

[0009] To achieve the above purpose, the present utility model provides a multi-stage rotary kiln overlapping scale sealing device, adopting the following technical solutions, including: a combustion chamber, the combustion chamber adopts a ceramic fiber module shell, a rotary kiln body is arranged on one side of the combustion chamber, a static sealing seat is arranged on the outside of the rotary kiln body on one side of the combustion chamber, fish scale pieces are arranged on one side of the static sealing seat, the fish scale pieces include a middle aluminum carbonate fiber board, an outer external fish scale piece and an inner internal fish scale piece, the fish scale pieces are fixed on the static sealing seat through fish scale piece fixing bolts, a dynamic sealing seat is arranged on the outside of the rotary kiln body, and the other side of the fish scale piece is in sliding contact with the dynamic sealing seat.

[0010] Further, a sealing fiber rope is arranged inside the static sealing seat, the static sealing seat is provided with several fiber rope adjusting bolts, a fiber rope fixing angle iron is arranged below the fiber rope adjusting bolts, the fiber rope fixing angle iron is clamped and pressed against the sealing fiber rope, and the sealing fiber rope is tightened by tightening the fiber rope adjusting bolts.

[0011] Further, a refractory material retaining wall is arranged on the outer ring on one side of the rotary kiln body where the combustion chamber is located.

[0012] Further, a steel wire rope fixing hook is arranged on the outside of the fish scale piece.

[0013] Compared with the prior art, the beneficial effects of the present utility model are:

[0014] Under the condition that the overall frame structures of the combustion chamber and the rotary kiln body remain unchanged, the sealing performance of the rotary kiln device is increased by optimizing and improving some internal and external structures of the rotary kiln. After passing through the four-stage sealing structure of the refractory material retaining wall, the gap between the rotary kiln body and the ceramic fiber module, the sealing fiber rope, and the fish scales, the possibility of the high-temperature flue gas escaping is greatly reduced.

[0015] Among them, the fish scale friction seal is the last seal to isolate the flue gas. Compared with the single-layer fish scale seal device, it not only greatly improves the sealing performance of the device, but also the aluminum carbonate fiber board sandwiched in the three-stage fish scales can effectively absorb the kinetic energy carried by the high-temperature flue gas when it rushes out of the combustion chamber, reduce the possibility of the high-temperature flue gas escaping, enhance the mechanical strength of the device, and increase the durability and practicality of the device.

[0016] At the same time, the three-layer fish scale structure can also effectively isolate the contact between external impurities and the inside of the rotary kiln body, reduce the possibility of external impurities entering the rotary kiln, and ensure the purity, performance and yield of the activated carbon product to a certain extent. By improving the sealing performance of the rotary kiln device, the raw material utilization rate of rotary high-temperature flue gas furnaces such as hazardous waste incineration and activated carbon regeneration combined furnaces can be greatly enhanced, the reaction yield can be increased, and at the same time, the performance of the rotary kiln device can be optimized to a certain extent, the practicality and durability of the device can be increased, and the service life of the reaction furnace can be extended. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0018] Figure 2 is an enlarged schematic diagram of the sealing structure of the present utility model;

[0019] Figure 3 is a schematic cross-sectional view of the fiber rope fixation of the present utility model.

[0020] In the figure: 1 - ceramic fiber module; 2 - rotary kiln body; 3 - refractory material retaining wall; 4 - static seal seat; 5 - fiber rope adjusting bolt; 6 - fiber rope fixing angle iron; 7 - sealing fiber rope; 8 - fish scale fixing bolt; 9 - aluminum carbonate fiber board; 10 - internal fish scales; 11 - external fish scales; 12 - dynamic seal seat; 13 - combustion chamber; 14 - wire rope fixing hook. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] The preferred embodiments of the present utility model will be described in more detail below. Although the preferred embodiments of the present utility model are described below, it should be understood that the present utility model can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present utility model more thorough and complete, and to be able to fully convey the scope of the present utility model to those skilled in the art.

[0022] In the description of the present utility model, it should be noted that the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0023] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0024] As Figures 1-3 shown, the present utility model is a multi-stage rotary kiln fish scale sealing device, including: a combustion chamber 13, the combustion chamber 13 adopts a ceramic fiber module 1 housing, a rotary kiln body 2 is arranged on one side of the combustion chamber 13, and a 2-mm gap is left between the ceramic fiber module 1 and the rotary kiln body 2.

[0025] On one side of the combustion chamber 13 and outside the rotary kiln body 2, a static seal seat 4 is arranged. Inside the static seal seat 4, a sealing fiber rope 7 is arranged. The static seal seat 4 is provided with a plurality of fiber rope adjusting bolts 5. Below the fiber rope adjusting bolts 5, a fiber rope fixing angle iron 6 is arranged. The fiber rope fixing angle iron 6 is clamped and presses tightly against the sealing fiber rope 7, and the sealing fiber rope 7 is tightened by tightening the fiber rope adjusting bolts 5. When high-temperature flue gas leaks out through the 2-mm gap, it is blocked by the sealing fiber rope 7. After the furnace body operates for a period of time, a certain gap will be generated between the sealing fiber rope 7 and the furnace body. By adjusting the fiber rope adjusting bolts 5, the sealing fiber rope 7 is reset to ensure the sealing effect.

[0026] On one side of the static seal seat 4, fish scales are arranged. The fish scales include a middle aluminum carbonate fiber board 9, an outer external fish scale 11, and an inner internal fish scale 10. The fish scales are fixed on the static seal seat 4 through fish scale fixing bolts 8. On the outside of the rotary kiln body 2, a dynamic seal seat 12 is arranged. The other side of the fish scales is in sliding contact with the dynamic seal seat 12. Compared with the single-layer fish scale sealing device, not only the sealing performance of the device is greatly improved, but also the aluminum carbonate fiber board sandwiched in the three-stage fish scales can effectively absorb the kinetic energy carried by the high-temperature flue gas when it rushes out of the combustion chamber, reduce the possibility of the high-temperature flue gas escaping, and enhance the mechanical strength of the device.

[0027] On the outer ring of one side of the rotary kiln body 2 and the combustion chamber 13, a refractory material retaining wall 3 is arranged, which plays a role in blocking the flue gas when the flue gas needs to leak out from the gap between the rotary kiln body 2 and the combustion chamber 13. And when the flue gas enters the gap, it needs to bend, forming a kind of labyrinth seal here.

[0028] A steel wire rope fixing hook 14 is arranged on the outer side of the fish scale. During the operation of the device, heavy objects can be wound with a steel wire rope and hung, so that the fish scale fits tightly with the dynamic seal seat 12 to prevent high-temperature flue gas from escaping.

[0029] The above embodiments are only the preferred embodiments of the present invention. The above description does not limit the protection scope of the present invention in turn. The above description is exemplary and not exhaustive. Therefore, all equivalent changes made according to the structure, shape and principle of the present invention should be covered within the protection scope of the present invention. Many modifications and changes are obvious to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A multi-stage rotary kiln fish scale sealing device, characterized in that: include: A combustion chamber (13), wherein the combustion chamber (13) adopts a ceramic fiber module (1) shell, a rotary kiln body (2) is arranged on one side of the combustion chamber (13), a static sealing seat (4) is arranged on one side of the combustion chamber (13) and is located outside the rotary kiln body (2), a fish scale is arranged on one side of the static sealing seat (4), the fish scale comprises an aluminum carbonate fiber plate (9) in the middle, an external fish scale (11) on the outside and an internal fish scale (10) on the inside, the fish scale is fixed to the static sealing seat (4) by fish scale fixing bolts (8), a dynamic sealing seat (12) is arranged on the outside of the rotary kiln body (2), and the other side of the fish scale is in sliding contact with the dynamic sealing seat (12).

2. A multi-stage rotary kiln fish scale sealing device according to claim 1, characterized in that: A sealing fiber rope (7) is arranged on the inner side of the static sealing seat (4), and a plurality of fiber rope adjusting bolts (5) are arranged on the static sealing seat (4). A fiber rope fixing angle iron (6) is arranged at the lower part of the fiber rope adjusting bolt (5). The fiber rope fixing angle iron (6) clamps and tightens the sealing fiber rope (7), and the sealing fiber rope (7) is tightened by tightening the fiber rope adjusting bolt (5).

3. The multi-stage rotary kiln fish scale sealing device according to claim 1, characterized in that: The rotary kiln body (2) is provided with a refractory retaining wall (3) on the outer ring at one side of the combustion chamber (13).

4. The multi-stage rotary kiln fish scale sealing device according to claim 1, characterized in that: A steel wire rope fixing hook (14) is arranged on the outer side of the fish scale.

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