Smoke filtering device for tunnel kiln

Abstract

The utility model is suitable for the technical field of tunnel kiln tail gas treatment, and provides a flue gas filtering device for a tunnel kiln, which comprises a support frame, the dust removal tank is installed on the supporting frame, the dust removal tank is filled with dust removal water, and an opening is formed in the top of the dust removal tank; the connecting pipe is installed on the dust removal tank, a threaded cylinder used for being connected with a tunnel kiln waste gas pipeline is fixed to the connecting pipe, and the connecting pipe extends to the bottom of the dust removal tank. The flue gas filtering device for the tunnel kiln is simple in structure, flue gas waste heat can be recycled, the flue gas emission temperature can be reduced, meanwhile, flue dust can be pretreated, and the flue dust is prevented from being attached to the inner wall of an exhaust pipeline to cause pipeline blockage and further influence on flue gas emission.

Description

Technical Field

[0001] The utility model belongs to the technical field of tunnel kiln tail gas treatment, and particularly relates to a flue gas filtering device for a tunnel kiln. Background Technique

[0002] A tunnel kiln is a modern continuous firing thermal equipment, which is widely used in the roasting production of ceramic products and is also very widely used in metallurgical industries such as abrasives. At present, when using a tunnel kiln to fire refractory bricks, a large amount of flue gas is usually generated, so a flue gas treatment device is needed to treat the tunnel kiln flue gas.

[0003] Existing flue gas treatment devices can recover the waste heat of the flue gas. In order to ensure the heat utilization efficiency, it is necessary to extend the flue gas discharge pipe. The main components of tunnel kiln flue gas include dust, sulfur dioxide, nitrogen oxides and other substances. The dust adheres to the inner wall of the pipe, affecting the subsequent gas discharge. It is easy to cause gas blockage problems after long-term accumulation. At the same time, the position of the pipe is relatively fixed and it is not convenient to disassemble and clean. For example, the patent document with the authorization announcement number CN218296785U has such problems. Content of the Utility Model

[0004] The utility model provides a flue gas filtering device for a tunnel kiln, aiming to solve the problems that the existing flue gas treatment device has a long pipe and is not convenient to disassemble and clean as mentioned in the above background technique.

[0005] To solve the above problems, the utility model is realized as follows. A flue gas filtering device for a tunnel kiln includes: a support frame; a dust removal tank, the dust removal tank is installed on the support frame, the dust removal tank is filled with dust-removing water, and an opening is provided at the top of the dust removal tank; a connecting pipe, the connecting pipe is installed on the dust removal tank, a threaded cylinder for connecting the waste gas pipe of the tunnel kiln is fixed on the connecting pipe, and the connecting pipe extends to the bottom of the dust removal tank; a movable plate, the movable plate is fixed on the connecting pipe, a sealing ring is fixedly sleeved outside the movable plate, and the sealing ring is in contact with the inner wall of the opening; a waste heat recovery component, the waste heat recovery component is arranged on the support frame, and the waste heat recovery component is used for recovering the waste heat of the flue gas; a tail gas purification component, the tail gas purification component is arranged on the support frame, and the tail gas purification component is used for purifying the flue gas.

[0006] Preferably, the waste heat recovery component includes a heat insulation cylinder, a metal tank and an exhaust pipe. The heat insulation cylinder is fixed on the support frame, the metal tank is installed in the heat insulation cylinder, the metal tank is used for storing clean water, the exhaust pipe is fixed on the top of the dust removal tank and extends into the heat insulation cylinder, the exhaust pipe is wound outside the metal tank and extends out of the heat insulation cylinder through the metal tank, a pressure relief pipe extending outside the heat insulation cylinder is provided on the metal tank, and a pressure relief valve is provided on the pressure relief pipe.

[0007] Preferably, the tail gas purification component includes a treatment cylinder, a dust-proof net and an adjustment pipe. The treatment cylinder is fixed on the support frame, the dust-proof net is arranged on the top of the treatment cylinder, the adjustment pipe is installed on the top of the treatment cylinder and connected to the exhaust pipe, the adjustment pipe extends to the bottom of the treatment cylinder, and limestone slurry is poured into the treatment cylinder.

[0008] Preferably, a stirring rod is rotatably installed at the bottom of the treatment cylinder, a motor is fixed at the bottom of the treatment cylinder, the output shaft of the motor is fixedly connected to the stirring rod, and a protective shell is fixedly sleeved outside the motor.

[0009] Preferably, sewage discharge pipes are installed on both the dust removal tank and the treatment cylinder, a liquid discharge pipe extending outside the heat insulation cylinder is installed at the bottom of the metal tank, valves are provided on both of the two sewage discharge pipes and the liquid discharge pipe, the sewage discharge pipe is used for discharging sewage, and the liquid discharge pipe is used for discharging hot water.

[0010] Preferably, the exhaust pipe is made of metal, heat insulation cotton is pasted on the inner wall of the heat insulation cylinder, a snap ring is installed on one side of the dust removal tank, the snap ring is movably sleeved outside the connecting pipe, and the snap ring is used for stabilizing the connecting pipe.

[0011] Preferably, a temperature sensor is installed on the heat insulation cylinder, the temperature sensor extends into the metal tank, and observation windows are provided on both the dust removal tank and the treatment cylinder.

[0012] Compared with the related art, the flue gas filtering device for a tunnel kiln provided by the present utility model has the following beneficial effects:

[0013] Compared with the prior art, the flue gas filtering device for a tunnel kiln provided by this solution can preliminarily remove dust from the flue gas by setting a dust removal tank, prevent dust from adhering and accumulating on the inner wall of the pipeline to cause blockage, and at the same time, using water to clean the dust can reduce the difficulty of replacing the filter material, and the heat loss of the flue gas by the heated water is also relatively low. By setting a metal tank to store clean water and matching it with the exhaust pipe, the waste heat can be recovered, and the heated clean water can be used for daily use. By setting a treatment cylinder to store limestone slurry, the flue gas can be desulfurized, and by driving the stirring rod to rotate by a motor, the mixing effect of the flue gas and the limestone slurry can be increased, thereby increasing the flue gas treatment effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is the front view structural schematic diagram of a flue gas filtering device for a tunnel kiln provided by the present utility model;

[0015] Figure 2 is the front view sectional structural schematic diagram of a flue gas filtering device for a tunnel kiln provided by the present utility model;

[0016] Figure 3 is Figure 2 a schematic enlarged structure diagram of part A shown in

[0017] Figure 4 a three-dimensional structure diagram of the treatment cylinder in the present utility model.

[0018] Reference numerals: 1, support frame; 2, dust removal tank; 3, heat insulation cylinder; 4, treatment cylinder; 5, observation window; 6, metal tank; 7, temperature sensor; 8, motor; 9, stirring rod; 10, dust-proof net; 11, exhaust pipe; 12, connecting pipe; 13, movable plate; 14, threaded cylinder; 15, snap ring; 16, adjusting pipe; 17, protective shell; 18, sewage discharge pipe. Detailed implementation manners

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the specification and claims of this application or the above drawings are used to distinguish different objects and not to describe a specific order; the terms "inner", "outer", "left", "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model.

[0020] Referring to "embodiments" herein means that the specific features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of this application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0021] An embodiment of the present utility model provides a flue gas filtering device for a tunnel kiln, as Figures 1-4As shown in the figure, the flue gas filtering device for a tunnel kiln includes: a support frame 1; a dust removal tank 2, the dust removal tank 2 is installed on the support frame 1, the dust removal tank 2 is filled with dust-removing water, and the top of the dust removal tank 2 is provided with an opening; a connecting pipe 12, the connecting pipe 12 is installed on the dust removal tank 2, a threaded cylinder 14 for connecting the waste gas pipeline of the tunnel kiln is fixed on the connecting pipe 12, and the connecting pipe 12 extends to the bottom of the dust removal tank 2; a movable plate 13, the movable plate 13 is fixed on the connecting pipe 12, a sealing ring is fixedly sleeved outside the movable plate 13, and the sealing ring is in contact with the inner wall of the opening; a waste heat recovery component, the waste heat recovery component is arranged on the support frame 1, and the waste heat recovery component is used for recovering the waste heat of the flue gas; a tail gas purification component, the tail gas purification component is arranged on the support frame 1, and the tail gas purification component is used for purifying the flue gas.

[0022] In this embodiment, the support frame 1 serves as the basic support structure of the entire flue gas treatment device, stably carrying the subsequent functional components and ensuring the stable operation of the entire system. The dust removal tank 2 is filled with dust-removing water, which is the key part for treating the dust in the flue gas. When the flue gas containing dust enters the dust removal tank 2 through the connecting pipe 12, the dust particles are effectively intercepted due to the action of gravity and the wetting action of water, thereby purifying the flue gas and avoiding the accumulation and blockage problems of dust in the discharge pipeline. The connecting pipe 12 is responsible for introducing the waste gas of the tunnel kiln into the dust removal tank 2, and the threaded cylinder 14 thereon provides a convenient and stable connection method with the waste gas pipeline of the tunnel kiln, ensuring the smooth flow of the flue gas. The movable plate 13 is fixed on the connecting pipe 12 and is in close contact with the opening at the top of the dust removal tank 2 through the sealing ring, forming an effective seal to prevent gas leakage during the treatment process, ensuring the dust removal efficiency, and being convenient for disassembly. The waste heat recovery component converts the heat energy in the flue gas into available energy through efficient heat exchange technology, significantly improving the energy utilization efficiency and reducing the energy consumption. The tail gas purification component mainly purifies harmful gases such as sulfur dioxide and nitrogen oxides in the flue gas to ensure that the discharged tail gas meets the environmental protection standards and reduces environmental pollution.

[0023] In a further preferred embodiment of the present utility model, the waste heat recovery component includes a heat insulation cylinder 3, a metal tank 6 and an exhaust pipe 11. The heat insulation cylinder 3 is fixed on the support frame 1, the metal tank 6 is installed in the heat insulation cylinder 3, the metal tank 6 is used for storing clean water, the exhaust pipe 11 is fixed on the top of the dust removal tank 2 and extends into the heat insulation cylinder 3, the exhaust pipe 11 is wound around the outside of the metal tank 6 and penetrates through the metal tank 6 and extends outside the heat insulation cylinder 3, and a pressure relief pipe extending outside the heat insulation cylinder 3 is provided on the metal tank 6, and a pressure relief valve is provided on the pressure relief pipe.

[0024] In this embodiment, the function of the heat insulation cylinder 3 is to provide a heat-insulated environment to protect the internal metal tank 6 from external temperature fluctuations, ensuring the stability and efficiency of the waste heat recovery process. The metal tank 6 serves not only as a container for water but also as part of the heat exchanger. When the high-temperature flue gas flows through the outside of the metal tank 6 via the exhaust pipe 11, its heat will be transferred to the metal tank 6 and the fresh water inside it, realizing the recovery of heat. The design of the exhaust pipe 11 is very ingenious. It winds around the outside of the metal tank 6 and extends through the metal tank 6 to the outside of the heat insulation cylinder 3. Such a layout enables the high-temperature flue gas discharged from the dust removal tank 2 to fully contact the metal tank 6, maximizing the heat exchange area and improving the waste heat recovery efficiency.

[0025] In a further preferred embodiment of the present utility model, the tail gas purification assembly includes a treatment cylinder 4, a dust-proof net 10, and an adjustment pipe 16. The treatment cylinder 4 is fixed on the support frame 1. The dust-proof net 10 is arranged at the top of the treatment cylinder 4. The adjustment pipe 16 is installed at the top of the treatment cylinder 4 and is connected to the exhaust pipe 11. The adjustment pipe 16 extends to the bottom of the treatment cylinder 4. Limestone slurry is poured into the treatment cylinder 4.

[0026] In this embodiment, the treatment cylinder 4 is the core part of the tail gas purification. Limestone slurry is poured into its interior. This is a chemical substance commonly used to absorb harmful gases such as sulfur dioxide and nitrogen oxides in flue gas. Through chemical reactions, the limestone slurry can effectively convert these harmful gases into harmless or low-toxic compounds. The main function of the dust-proof net 10 is to prevent external impurities or dust from entering the interior of the treatment cylinder 4, ensuring the purity and efficiency of the tail gas purification process, and at the same time ensuring that the treated tail gas can be discharged normally. The design of the adjustment pipe 16 enables the tail gas discharged from the waste heat recovery assembly to smoothly enter the interior of the treatment cylinder 4 for subsequent purification treatment.

[0027] In a further preferred embodiment of the present utility model, a stirring rod 9 is rotatably installed at the bottom of the treatment cylinder 4. A motor 8 is fixed at the bottom of the treatment cylinder 4. The output shaft of the motor 8 is fixedly connected to the stirring rod 9. A protective shell 17 is fixedly sleeved outside the motor 8.

[0028] In this embodiment, the stirring rod 9 is the key to realizing the uniform mixing and full reaction of the limestone slurry. By rotating the stirring rod 9, the static stratification of the limestone slurry can be broken, enabling the chemical substances in the slurry to fully contact the harmful gases in the tail gas, thereby accelerating the reaction speed and improving the purification efficiency. The motor 8 provides power for the rotation of the stirring rod 9. The main function of the protective shell 17 is to protect the motor 8 from the influence of the external environment, such as dust and moisture, thereby extending the service life of the motor 8 and improving the stability and reliability of the system.

[0029] In a further preferred embodiment of the present utility model, drain pipes 18 are installed on both the dust removal tank 2 and the treatment cylinder 4. A liquid discharge pipe extending outside the heat insulation cylinder 3 is installed at the bottom of the metal tank 6. Valves are provided on both of the two drain pipes 18 and the liquid discharge pipe. The drain pipe 18 is used for discharging sewage, and the liquid discharge pipe is used for discharging hot water.

[0030] In this embodiment, the main function of the drain pipe 18 is to discharge the accumulated sewage or waste liquid in their respective containers. The drain pipe 18 in the dust removal tank 2 is mainly used for discharging the sewage containing soot particles generated during the dust removal process, while the drain pipe 18 in the treatment cylinder 4 is used for discharging the waste liquid or sediment generated after reacting with harmful gases. By regularly discharging these sewage and waste liquids, the interiors of the dust removal tank 2 and the treatment cylinder 4 can be kept clean, ensuring the purification effect. With the recovery of the waste heat of the flue gas, the clear water in the metal tank 6 will gradually heat up to form hot water. Through the liquid discharge pipe, this hot water can be discharged and used in other occasions that require hot water, such as heating, bathing, etc., thus realizing the reuse of energy. The setting of the valves enables the operator to flexibly control the discharge time and amount of sewage, waste liquid, and hot water according to actual needs, improving the operation convenience and safety of the system.

[0031] In a further preferred embodiment of the present utility model, the exhaust pipe 11 is made of metal. Heat insulation cotton is pasted on the inner wall of the heat insulation cylinder 3. A clamping ring 15 is installed on one side of the dust removal tank 2. The clamping ring 15 is movably sleeved outside the connecting pipe 12. The clamping ring 15 is used to stabilize the connecting pipe 12.

[0032] In this embodiment, due to the high temperature resistance and good thermal conductivity of the metal material, in the environment of high-temperature flue gas, the metal exhaust pipe 11 can maintain a stable structure, is not easily deformed or damaged, and can more effectively transfer the heat of the flue gas to the subsequent waste heat recovery components. In addition, the metal material is also convenient for processing and installation, improving the overall reliability of the system. As an efficient heat insulation material, the heat insulation cotton can effectively block the transfer of heat from the inside of the heat insulation cylinder 3 to the outside, thus protecting the external environment and equipment from the influence of high temperature. At the same time, the use of heat insulation cotton also reduces the heat loss inside the heat insulation cylinder 3, improving the efficiency of waste heat recovery. Through its fastening effect, the clamping ring 15 firmly fixes the connecting pipe 12 on the dust removal tank 2, preventing the connection from loosening or falling off due to vibration or external force. This stable connection method helps to ensure the smoothness and safety of the flue gas during transmission.

[0033] In a further preferred embodiment of the present utility model, a temperature sensor 7 is installed on the heat insulation cylinder 3. The temperature sensor 7 extends into the metal tank 6. Observation windows 5 are provided on both the dust removal tank 2 and the treatment cylinder 4.

[0034] In this embodiment, the addition of the temperature sensor 7 enables the system to monitor the temperature of the water in the metal tank 6 in real time, so as to grasp the efficiency of waste heat recovery. The temperature sensor 7 transmits the collected temperature data to the control system, and the operator can adjust the working state of the system according to these data to achieve the best waste heat recovery effect. The observation window 5 is made of transparent material, allowing the operator to directly observe the working state inside the equipment without opening the equipment. For the dust removal tank 2, the observation window 5 can help the operator check the dust removal effect and judge whether it is necessary to clean or replace the dust removal material. For the treatment cylinder 4, the observation window 5 allows the operator to observe the reaction of the limestone slurry with the tail gas and the accumulation of waste liquid or sediment. The setting of the observation window 5 greatly improves the operation convenience and maintenance efficiency of the system.

[0035] In summary, compared with the related technologies, this device can preliminarily remove dust from the flue gas by setting the dust removal tank 2, preventing the dust from adhering and accumulating on the inner wall of the pipeline and causing blockage. At the same time, using water to clean the dust can reduce the difficulty of replacing the filter material, and the heat loss of the flue gas caused by the heated water is also relatively low. By setting the metal tank 6 to store clean water and cooperating with the exhaust pipe 11, waste heat can be recovered, and the heated clean water can be used for daily use. By setting the treatment cylinder 4 to store limestone slurry, desulfurization treatment of the flue gas can be carried out. By driving the stirring rod 9 to rotate with the motor 8, the mixing effect of the flue gas and the limestone slurry can be increased, thereby increasing the flue gas treatment effect.

[0036] In several embodiments provided by this application, it should be understood that the disclosed device can be implemented in other ways.

[0037] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the protection scope of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on these embodiments, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art can still, without conflict, make combinations, additions, deletions or other adjustments to the features in the embodiments of the present invention according to the situation without creative work, so as to obtain different technical solutions that essentially do not deviate from the concept of the present invention, and these technical solutions also belong to the scope of protection of the present invention.

Claims

1. A smoke filter device for a tunnel kiln, characterized in that: include: Support frame; A dust removal tank, the dust removal tank is installed on the support frame, the dust removal tank is filled with dust reduction water, and the top of the dust removal tank is provided with an opening; A connecting pipe, the connecting pipe is installed on the dust removal tank, a threaded tube for connecting to the exhaust gas pipeline of the tunnel kiln is fixed on the connecting pipe, and the connecting pipe extends to the bottom of the dust removal tank; A movable plate, the movable plate is fixed on the connecting pipe, a sealing ring is provided on the outer fixed sleeve of the movable plate, and the sealing ring contacts the inner wall of the opening; A waste heat recovery component, the waste heat recovery component is arranged on the support frame, and the waste heat recovery component is used to recover waste heat of flue gas; An exhaust gas purification component is arranged on the support frame, and the exhaust gas purification component is used to purify flue gas.

2. The smoke filter device for tunnel kiln according to claim 1, characterized in that: The waste heat recovery component includes an insulating cylinder, a metal tank and an exhaust pipe. The insulating cylinder is fixed on the support frame, the metal tank is installed in the insulating cylinder, the metal tank is used to store clean water, the exhaust pipe is fixed on the top of the dust removal tank and extends into the insulating cylinder, the exhaust pipe is wrapped around the outside of the metal tank and passes through the metal tank to extend to the outside of the insulating cylinder, the metal tank is provided with a pressure relief pipe extending to the outside of the insulating cylinder, and the pressure relief pipe is provided with a pressure relief valve.

3. The smoke filter device for tunnel kiln according to claim 2, characterized in that: The exhaust gas purification component includes a treatment tube, a dustproof net and an adjusting pipe. The treatment tube is fixed on the support frame, the dustproof net is arranged on the top of the treatment tube, the adjusting pipe is installed on the top of the treatment tube and connected to the exhaust pipe, the adjusting pipe extends to the bottom of the treatment tube, and the treatment tube is filled with limestone slurry.

4. The smoke filter device for tunnel kiln according to claim 3, characterized in that: A stirring rod is rotatably mounted at the bottom of the treatment cylinder, a motor is fixed at the bottom of the treatment cylinder, an output shaft of the motor is fixedly connected to the stirring rod, and a protective shell is provided outside the motor fixed sleeve.

5. The smoke filter device for tunnel kiln according to claim 3, characterized in that: The dust removal tank and the treatment cylinder are both equipped with drain pipes, and the bottom of the metal tank is equipped with a drain pipe extending to the outside of the insulation cylinder. Valves are provided on both the drain pipes and the drain pipes. The drain pipes are used to discharge sewage, and the drain pipes are used to discharge hot water.

6. The smoke filter device for tunnel kiln according to claim 2, characterized in that: The exhaust pipe is made of metal, and heat insulation cotton is pasted on the inner wall of the heat insulation tube. A clamping ring is installed on one side of the dust removal tank. The clamping ring is movably sleeved outside the connecting pipe, and the clamping ring is used to stabilize the connecting pipe.

7. The smoke filter device for tunnel kiln according to claim 3, characterized in that: A temperature sensor is installed on the heat-insulating cylinder, and the temperature sensor extends into the metal tank. Both the dust removal tank and the processing cylinder are provided with observation windows.

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