Automatic dust cleaning and collecting system for cement kiln tail
By designing a sealing cover and ash collection system at the cement kiln tail, the problem of ash leakage at the kiln tail was solved, realizing automated kiln ash collection and cooling, reducing environmental pollution and the burden of manual cleaning.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUBEI JINGLAN CEMENT CO LTD
- Filing Date
- 2025-04-23
- Publication Date
- 2026-06-16
AI Technical Summary
The existing rotary kiln at the tail of the cement kiln has ash leakage, which leads to secondary dust pollution and time-consuming and labor-intensive problems.
Design an automatic dust collection and cleaning system for cement kiln tail, including a sealing cover, a slot, a sealing plate, and a dust collection hopper. The sealing cover collects kiln ash, and a high-temperature fan and pipeline system are used to cool and transport the kiln ash to the main exhaust gas pipeline of the preheater, thereby achieving automatic dust collection.
It effectively prevents kiln ash from leaking into the environment, reduces secondary dust, improves ash removal efficiency, and reduces the burden of manual cleaning.
Smart Images
Figure CN224365368U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of cement production equipment technology, specifically to an automatic dust collection and cleaning system for cement kiln tail. Background Technology
[0002] The connection between the cement kiln tail flue and the rotary kiln tail is equipped with a kiln tail sealing device. The function of this sealing device is to prevent kiln ash from escaping and polluting the environment. However, in actual production, due to factors such as the vertical movement of the rotary kiln, thermal expansion and contraction of the cylinder, and wear of the seal, it is difficult to completely eliminate the phenomenon of kiln tail ash leakage. Generally, the leaked ash is first collected and transported to the ground, and then manually cleaned. This ash cleaning method has the problems of secondary dust pollution and is time-consuming and labor-intensive. Utility Model Content
[0003] (a) Technical problems to be solved
[0004] To address the shortcomings of existing technologies, this utility model provides an automatic dust collection and cleaning system for cement kiln tails, which solves the problem of ash leakage at the tail of existing rotary kilns.
[0005] (II) Technical Solution
[0006] To achieve the above objectives, this utility model provides the following technical solution: an automatic dust collection and cleaning system for cement kiln tails, comprising a rotary kiln and a sealing cover. A kiln tail seal is provided at the tail of the rotary kiln. A slot is formed on the side of the sealing cover near the kiln tail seal, the diameter of which is larger than the diameter of the kiln tail seal. A sealing plate is provided on the outer side of the kiln tail seal. A hidden groove is formed inwardly in the middle of the slot, and the sealing plate is located in the slot and partially extends into the hidden groove.
[0007] A dust collection hopper is installed at the bottom of the sealing cover. A connecting hose is installed at the bottom of the dust collection hopper. One end of the connecting hose is connected to a dust suction pipe, which is connected to the main exhaust gas pipeline of the preheater. An air inlet pipe is installed at the outlet of the main exhaust gas pipeline of the preheater. A high-temperature fan is installed on the air inlet pipe. The outlet of the air inlet pipe is connected to a bypass branch pipe and a raw material mill, respectively. The bypass branch pipe is connected to a bag dust collector.
[0008] As a further preferred embodiment, the inner wall of the ash collection hopper is provided with a cooling chamber, and the cooling chamber is respectively provided with a cold water inlet and a hot water outlet.
[0009] As a further preferred embodiment, a cleaning brush is provided in the middle of the kiln tail seal, which can clean the inner wall of the sealing cover.
[0010] As a further preferred embodiment, the raw material mill is connected to a cyclone separator via an exhaust gas pipe, and the cyclone separator is connected to a bag filter via a circulating fan.
[0011] As a further preferred embodiment, the inner wall of the ash collection hopper is equipped with a level gauge, the outlet of the ash collection hopper is equipped with an airlock valve, and the inlet of the dust collection pipe is equipped with an airflow regulating valve that is interlocked with the airlock valve.
[0012] (III) Beneficial Effects
[0013] This utility model provides an automatic dust collection and cleaning system for cement kiln tails. It has the following beneficial effects:
[0014] This automatic dust collection and cleaning system for cement kiln tails can collect kiln ash leaking from the kiln tail seal by setting up a sealing cover. Furthermore, the tight fit between the larger diameter slot and the sealing plate can overcome the ash leakage problem caused by the vertical movement of the rotary kiln, ensuring that the kiln ash does not leak into the environment. In addition, by setting up a cooling chamber in the ash collection hopper, the high-temperature kiln ash can be cooled and then connected to the main exhaust gas pipeline through a pipeline, thereby achieving the purpose of automatic dust collection. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the structure of this utility model;
[0016] Figure 2 This is a cross-sectional view of the sealing cover structure of this utility model;
[0017] Figure 3 This is a side view of the sealing cover structure of this utility model.
[0018] In the diagram: 1. Rotary kiln; 2. Kiln tail seal; 3. Sealing cover; 4. Groove opening; 5. Hidden trough; 6. Air volume regulating valve; 7. Sealing plate; 8. Ash hopper; 81. Cooling chamber; 82. Cold water inlet; 83. Hot water outlet; 9. Connecting hose; 10. Dust suction pipe; 11. High-temperature fan; 12. Preheater exhaust gas main pipe; 13. Cleaning brush; 14. Circulating fan; 15. Air inlet pipe; 16. Raw material mill; 17. Bypass branch pipe; 18. Bag dust collector; 19. Exhaust gas pipe; 20. Cyclone separator; 21. Level gauge; 22. Airlock valve. Detailed Implementation
[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0020] like Figure 1-3As shown, this utility model provides a technical solution: an automatic dust collection system for cement kiln tail, including a rotary kiln 1 and a sealing cover 3. A kiln tail seal 2 is provided at the tail of the rotary kiln 1. A slot 4 is provided on the side of the sealing cover 3 near the kiln tail seal 2. The diameter of the slot 4 is larger than the diameter of the kiln tail seal 2. The purpose of this design is to reserve space for the kiln tail seal 2 to move up and down, so as to avoid wear during movement.
[0021] A cleaning brush 13 is provided in the middle of the kiln tail seal 2. The cleaning brush 13 can clean the inner wall of the sealing cover 3. The cleaning brush 13 rotates with the kiln tail seal 2. During the rotation, the cleaning brush 13 can clean the inner wall of the sealing cover 3 and sweep away the kiln ash.
[0022] A sealing plate 7 is provided on the outer side of the kiln tail seal 2, and a hidden groove 5 is opened inward in the middle of the groove 4. The sealing plate 7 is located in the groove 4 and extends into the hidden groove 5.
[0023] The bottom of the sealing cover 3 is equipped with an ash collection hopper 8. The inner wall of the ash collection hopper 8 is provided with a cooling chamber 81. Since the temperature of the kiln ash is two to three hundred degrees, it needs to be cooled to prevent burns to the connecting hose 9. The cooling chamber 81 is provided with a cold water inlet 82 and a hot water outlet 83. The bottom of the ash collection hopper 8 is provided with a connecting hose 9. The connecting hose 9 is a transitional connector, and it is more suitable to use soft material than hard pipe here.
[0024] The inner wall of the ash collection hopper 8 is equipped with a level gauge 21, the outlet of the ash collection hopper 8 is equipped with an airlock valve 22, and the inlet of the dust suction pipe 10 is equipped with an air volume regulating valve 6 that is interlocked with the airlock valve 22.
[0025] One end of the connecting hose 9 is connected to a suction pipe 10, which is connected to the preheater exhaust main pipe 12 (the arrow in the figure indicates the direction of flue gas inlet). An air inlet pipe 15 is installed at the outlet of the preheater exhaust main pipe 12, and a high-temperature fan 11 is installed on the air inlet pipe 15. The outlet of the air inlet pipe 15 is connected to the bypass branch pipe 17 and the raw material mill 16 respectively. The bypass branch pipe 17 is connected to the bag dust collector 18. The raw material mill 16 is connected to the cyclone separator 20 through the exhaust pipe 19, and the cyclone separator 20 is connected to the bag dust collector 18 through the circulating fan 14.
[0026] Turn on the high-temperature fan 11 to extract the exhaust gas from the main exhaust gas pipe 12 of the preheater. The exhaust gas is divided into two paths and enters the bag dust collector 18. One path is sent directly into the bag dust collector 18 through the bypass branch pipe 17, and the other path is first sent into the raw material mill 16. Then, the exhaust gas discharged from the raw material mill 16 enters the cyclone 20 through the exhaust gas pipe 19 to achieve gas-solid separation. The exhaust gas is then extracted by the circulating fan 14 and sent into the bag dust collector 18.
[0027] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.
[0028] During use, the kiln ash leaking from the kiln tail is mainly collected through the sealing cover 3. In order to prevent the kiln ash from escaping from the contact point (groove 4) between the sealing cover 3 and the kiln tail seal 2, we provide a sealing plate 7 on the outside of the kiln tail seal 2. The sealing plate 7 can be inserted into the dark groove 5, and a gap is reserved between the kiln tail seal 2 and the groove 4. This gap is used as a buffer space when the kiln tail seal 2 moves up and down, so as to prevent the kiln tail seal 2 from colliding with the sealing cover 3 when it moves. The sealing plate 7 can always cover the entire groove 4 throughout the process to prevent the kiln ash from escaping.
[0029] The escaped kiln ash falls into the sealing cover 3 and enters the ash collection hopper 8 at the bottom. Cold water is introduced into the cooling chamber 81 through the cold water inlet 82 to cool the kiln ash. The warm water after absorbing heat is discharged through the hot water outlet 83.
[0030] The ash collection hopper 8 is equipped with a level gauge 21. When the ash level reaches the set height, the level gauge 21 triggers the airlock valve 22 and the air volume regulating valve 6 to open completely. The negative pressure in the pipeline is used to automatically extract the ash from the ash collection hopper. After the ash collection is completed, the valve automatically closes.
[0031] The kiln ash flows through the connecting hose 9 and the dust suction pipe 10, then merges into the preheater exhaust gas main pipe 12, and finally enters the dust collector for absorption.
[0032] In summary, this automatic dust collection and cleaning system for cement kiln tails, by setting up a sealing cover, can collect kiln ash leaking from the kiln tail seal. Furthermore, the tight fit between the larger diameter slot and the sealing plate can overcome the ash leakage problem caused by the vertical movement of the rotary kiln, ensuring that kiln ash does not leak into the environment. In addition, by setting up a cooling chamber in the ash collection hopper, the high-temperature kiln ash can be cooled and then connected to the main exhaust gas pipeline, thereby achieving the purpose of automatic dust collection.
[0033] It should be noted that all electrical components mentioned in this article are electrically connected to an external main controller and 220V or 380V AC mains power. The main controller can be a conventional, known device such as a computer, and its control principles, internal structure, and control switching methods are all conventional methods of existing technology. These are directly cited here without further elaboration. In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.
[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. An automatic dust collection and cleaning system for cement kiln tail, characterized in that: It includes a rotary kiln (1) and a sealing cover (3). The tail of the rotary kiln (1) is provided with a kiln tail seal (2). A slot (4) is opened on the side of the sealing cover (3) near the kiln tail seal (2). The diameter of the slot (4) is larger than the diameter of the kiln tail seal (2). A sealing plate (7) is provided on the outside of the kiln tail seal (2), and a hidden groove (5) is opened inward in the middle of the groove (4). The sealing plate (7) is located in the groove (4) and extends into the hidden groove (5). A dust collection hopper (8) is installed at the bottom of the sealing cover (3). A connecting hose (9) is installed at the bottom of the dust collection hopper (8). One end of the connecting hose (9) is connected to a dust suction pipe (10). The dust suction pipe (10) is connected to the main exhaust pipe (12) of the preheater. An air inlet pipe (15) is installed at the outlet of the main exhaust pipe (12) of the preheater. A high-temperature fan (11) is installed on the air inlet pipe (15). The outlet of the air inlet pipe (15) is connected to the bypass branch pipe (17) and the raw material mill (16) respectively. The bypass branch pipe (17) is connected to the bag dust collector (18).
2. The automatic dust collection and cleaning system for cement kiln tail as described in claim 1, characterized in that: The inner wall of the ash collection hopper (8) is provided with a cooling chamber (81), and the cooling chamber (81) is provided with a cold water inlet (82) and a hot water outlet (83).
3. The automatic dust collection and cleaning system for cement kiln tail as described in claim 1, characterized in that: A cleaning brush (13) is provided in the middle of the kiln tail seal (2), and the cleaning brush (13) can clean the inner wall of the sealing cover (3).
4. The automatic dust collection and cleaning system for cement kiln tail as described in claim 1, characterized in that: The raw material mill (16) is connected to the cyclone separator (20) through the exhaust gas pipe (19), and the cyclone separator (20) is connected to the bag dust collector (18) through the circulating fan (14).
5. The automatic dust collection and cleaning system for cement kiln tail as described in claim 1, characterized in that: The inner wall of the ash collection hopper (8) is equipped with a level gauge (21), the outlet of the ash collection hopper (8) is equipped with an airlock valve (22), and the inlet of the dust suction pipe (10) is equipped with an air volume regulating valve (6) that is interlocked with the airlock valve (22).