Ventilation mechanism for tunnel kiln

Abstract

The utility model relates to a ventilation mechanism for a tunnel kiln, which belongs to the technical field of tunnel kilns and comprises a tunnel kiln and a ventilation mechanism, and the ventilation mechanism comprises a smoke discharge unit, a combustion-supporting unit and a waste gas treatment structure. According to the ventilation mechanism for the tunnel kiln, the ventilation mechanism is arranged, the dual purification process of wet dust removal and activated carbon adsorption is adopted, dust particles are removed through a dust falling solution, organic pollutants are adsorbed through an activated carbon filter screen, it is ensured that waste gas is discharged after reaching the standard, and environmental pollution is reduced; a cover plate is matched with an electric push rod, a dust falling box is accurately covered during waste gas treatment, the airflow direction is controlled through an exhaust hole, the solution is prevented from splashing to pollute the interior of the equipment, and meanwhile, the gas-liquid contact area and the purification efficiency are ensured; the dust-falling box can be quickly replaced without disassembling the whole structure, so that the maintenance cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of tunnel kiln technology, specifically to a ventilation mechanism for tunnel kilns. Background Technology

[0002] A tunnel kiln is an industrial kiln used for the continuous firing of ceramics, refractory materials, bricks, tiles, and heat-treated metals. It features high efficiency, energy saving, and stable output, and is widely used in building materials, metallurgy, and chemical industries. Its basic structure consists of a kiln body, a conveying system, a combustion system, and a ventilation mechanism. The ventilation mechanism is mainly used to regulate the airflow, temperature, pressure, and atmosphere inside the kiln to ensure the uniformity and efficiency of the firing process. It consists of components such as fan equipment, ventilation ducts and openings, and regulating devices. The fan equipment consists of exhaust fans, combustion fans, cooling fans, and circulating fans, which can effectively collect and treat combustion exhaust gases to meet environmental emission requirements.

[0003] Chinese invention patent announcement number CN115727667A discloses an energy-saving and heat-insulating tunnel kiln circulating ventilation structure. However, in actual use, combustion exhaust gas is generated, which needs to be treated by activated carbon filter. However, the dust in the exhaust gas will accelerate the adsorption saturation of the activated carbon filter, thus affecting the exhaust gas treatment effect. Therefore, a ventilation mechanism for tunnel kilns is proposed to solve the above problems. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a ventilation mechanism for tunnel kilns, which has the advantages of facilitating dust suppression of exhaust gas and automatically replacing the dust suppression solution. It solves the problem that in actual use, combustion exhaust gas is generated, which needs to be treated with activated carbon filters. However, the dust in the exhaust gas will accelerate the adsorption saturation of the activated carbon filters, thereby affecting the treatment effect of the exhaust gas.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a ventilation mechanism for a tunnel kiln, comprising a tunnel kiln and a ventilation mechanism, wherein the ventilation mechanism includes a smoke exhaust unit, a combustion-supporting unit, and a waste gas treatment structure;

[0006] The exhaust gas treatment structure includes a filter box, an activated carbon filter, a support platform, two dust collection boxes, a stepper motor, gears, and a splash guard. The filter box is fixedly installed on the top of the tunnel kiln, the activated carbon filter is fixedly installed on one side of the filter box, the support platform is slidably installed in the filter box, the two dust collection boxes are detachably installed on the support platform and contain dust settling solution, the stepper motor is fixedly installed on the inner bottom wall of the filter box, the gear is fixedly installed on the output shaft of the stepper motor and meshes with the support platform, and the splash guard is installed in the filter box to prevent the dust settling solution from splashing.

[0007] Furthermore, the support platform includes a dual-cavity mounting platform, a rack, and two anti-detachment blocks. The two anti-detachment blocks are respectively fixedly installed on both sides of the dual-cavity mounting platform, and the two dust collection boxes are respectively installed in the two chambers of the dual-cavity mounting platform. The rack is fixedly installed at the bottom of the dual-cavity mounting platform and meshes with a gear.

[0008] Furthermore, the splash-proof assembly includes a cover plate and two electric push rods. The two electric push rods are respectively fixedly installed inside the filter box. The cover plate is fixedly connected to the telescopic ends of the two electric push rods. The size of the cover plate is adapted to the top opening of the dust collection box.

[0009] Furthermore, the smoke exhaust unit includes an air duct, a high-temperature resistant corrugated pipe, and a smoke exhaust fan. The air duct is connected to the smoke exhaust fan and the tunnel kiln respectively. The smoke exhaust fan is fixedly installed on the top of the tunnel kiln. The high-temperature resistant corrugated pipe is fixedly connected to the smoke exhaust fan, and one end of the high-temperature resistant corrugated pipe extends into the interior of the filter box.

[0010] Furthermore, the cover plate has multiple exhaust holes and a connecting groove. One end of the high-temperature resistant corrugated pipe passes through the connecting groove and extends into the dust-suppressing solution inside the dust-suppressing box. The high-temperature resistant corrugated pipe is fixedly connected to the connecting groove.

[0011] Furthermore, both sides of the filter box are provided with through grooves adapted to the dust collection box, and the inner bottom walls of the two through grooves are provided with guide grooves adapted to the size of the support platform.

[0012] Furthermore, the exhaust unit, combustion unit, and waste gas treatment structure are all installed on the tunnel kiln, and the exhaust unit and waste gas treatment structure are connected to each other.

[0013] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0014] This ventilation system for tunnel kilns employs a dual purification process combining wet dust removal and activated carbon adsorption. The dust-suppressing solution removes dust particles, while the activated carbon filter adsorbs organic pollutants, ensuring that exhaust gas meets emission standards and reducing environmental pollution. An automated stepper motor switches the dust-suppressing box, preventing downtime due to solution cleaning and improving continuous operation. A cover plate and electric push rod precisely cover the dust-suppressing box during exhaust gas treatment. Airflow direction is controlled through exhaust vents to prevent solution splashing and contamination of the equipment's interior, while ensuring gas-liquid contact area and purification efficiency. Dust-suppressing boxes can be quickly replaced without disassembling the entire structure via through-channels and guide slots on both sides of the filter box, reducing maintenance costs. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a partially enlarged view of the ventilation mechanism of this utility model;

[0017] Figure 3 This is a cross-sectional view of the filter box structure of this utility model;

[0018] Figure 4 This is a schematic diagram showing the open state of the cover plate and the replacement of the dust collection box in this utility model.

[0019] Figure 5 This is an exploded view of the filter box and dust collection box of this utility model.

[0020] Figure 6 This is a perspective view of the structural support platform of this utility model.

[0021] In the diagram: 1. Tunnel kiln; 2. Smoke exhaust unit; 3. Combustion unit; 4. Waste gas treatment structure; 41. Filter box; 42. Activated carbon filter; 43. Support platform; 431. Double-chamber mounting platform; 432. Anti-detachment block; 433. Rack; 44. Dust settling box; 45. Stepper motor; 46. Gear; 47. Splash protection assembly; 471. Cover plate; 472. Electric push rod. Detailed Implementation

[0022] 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.

[0023] Example 1: Please refer to Figure 1-6 The ventilation mechanism for a tunnel kiln in this embodiment includes a tunnel kiln 1 and a ventilation mechanism. The ventilation mechanism includes a smoke exhaust unit 2, a combustion-supporting unit 3 and a waste gas treatment structure 4. The smoke exhaust unit 2, the combustion-supporting unit 3 and the waste gas treatment structure 4 are all installed on the tunnel kiln 1, and the smoke exhaust unit 2 and the waste gas treatment structure 4 are connected to each other.

[0024] Example 2: Please refer to Figure 1-6Based on Embodiment 1, the exhaust gas treatment structure 4 includes a filter box 41, an activated carbon filter 42, a support platform 43, two dust collection boxes 44, a stepper motor 45, a gear 46, and a splash guard 47. The filter box 41 is fixedly installed on the top of the tunnel kiln 1, the activated carbon filter 42 is fixedly installed on one side of the filter box 41, the support platform 43 is slidably installed in the filter box 41, the two dust collection boxes 44 are detachably installed on the support platform 43 and contain dust collection solution, the stepper motor 45 is fixedly installed on the inner bottom wall of the filter box 41, the gear 46 is fixedly installed on the output shaft of the stepper motor 45 and meshes with the support platform 43, and the splash guard 47 is installed in the filter box 41 to prevent the dust collection solution from splashing.

[0025] The support platform 43 includes a double-cavity mounting platform 431, a rack 433, and two anti-detachment blocks 432. The two anti-detachment blocks 432 are fixedly installed on both sides of the double-cavity mounting platform 431, and the two dust collection boxes 44 are installed in the two chambers of the double-cavity mounting platform 431. The rack 433 is fixedly installed at the bottom of the double-cavity mounting platform 431 and meshes with the gear 46. The stepper motor 45 is started and drives the gear 46 to rotate, thereby driving the support platform 43 to move through the rack 433, thus controlling the horizontal movement of the two dust collection boxes 44.

[0026] In addition, both sides of the filter box 41 are provided with through grooves that are compatible with the dust collection box 44. The inner bottom wall of both through grooves is provided with guide grooves that are compatible with the size of the support platform 43. The cooperation of the guide grooves and the anti-detachment block 432 ensures that after the rack 433 moves to the maximum distance, the anti-detachment block 432 is pressed against one side of the filter box 41, thereby limiting the smooth sliding of the support platform 43, preventing derailment, and improving the stability and durability of the mechanical structure.

[0027] Using the above technical solution, when the dust-suppressing solution in one of the dust-suppressing boxes 44 reaches saturation, the stepper motor 45 meshes with the rack 433 at the bottom of the support platform 43 through the gear 46, driving the support platform 43 to slide horizontally in the filter box 41, thereby controlling the other dust-suppressing box 44 to move into the interior of the filter box 41, and then controlling the cover plate 471 to cover the top of the dust-suppressing box 44, thereby inserting the end of the high-temperature corrugated pipe into the dust-suppressing solution, realizing a continuous working mode of "one in use and one in standby", avoiding the interruption of exhaust gas treatment due to shutdown.

[0028] Example 3: Please refer to Figure 1-6 Based on Embodiment 2, the splash-proof assembly 47 includes a cover plate 471 and two electric push rods 472. The two electric push rods 472 are respectively fixedly installed inside the filter box 41. The cover plate 471 is fixedly connected to the telescopic ends of the two electric push rods 472. The size of the cover plate 471 is adapted to the top opening of the dust collection box 44.

[0029] The exhaust unit 2 includes an air duct, a high-temperature resistant corrugated pipe, and an exhaust fan. The air duct is connected to the exhaust fan and the tunnel kiln 1 respectively. The exhaust fan is fixedly installed on the top of the tunnel kiln 1. The high-temperature resistant corrugated pipe is fixedly connected to the exhaust fan. One end of the high-temperature resistant corrugated pipe extends into the interior of the filter box 41. The high-temperature resistant corrugated pipe can be easily moved out of the dust collection box 44 by utilizing its extensibility.

[0030] In addition, the cover plate 471 has multiple exhaust holes and a connecting groove. One end of the high-temperature resistant corrugated pipe passes through the connecting groove and extends into the dust settling solution inside the dust settling box 44. The high-temperature resistant corrugated pipe is fixedly connected to the connecting groove. The cover plate 471 cooperates with the electric push rod 472 to accurately cover the dust settling box 44 during exhaust gas treatment. The airflow direction is controlled by the exhaust holes to prevent solution splashing and contaminating the inside of the equipment, while ensuring the gas-liquid contact area and purification efficiency.

[0031] Using the above technical solution, the exhaust unit 2 extracts the high-temperature exhaust gas from the tunnel kiln 1 through the air duct and exhaust fan, and transports it to the filter box 41 of the exhaust gas treatment structure 4 through the high-temperature resistant corrugated pipe. The end of the high-temperature resistant corrugated pipe passes through the connecting groove of the cover plate 471 and is inserted into the dust settling solution in the dust settling box 44, so that the exhaust gas bubbles out of the solution under pressure. The dust settling solution can capture dust particles and some harmful impurities in the exhaust gas, and achieve preliminary purification through the wet dust removal principle.

[0032] The working principle of the above embodiments is as follows:

[0033] In use, the ventilation mechanism for the tunnel kiln uses the exhaust unit 2 to extract the high-temperature exhaust gas from the tunnel kiln 1 through the duct and exhaust fan. The exhaust gas is then transported through the high-temperature corrugated pipe to the filter box 41 of the exhaust gas treatment structure 4. The end of the high-temperature corrugated pipe passes through the connecting groove of the cover plate 471 and is inserted into the dust settling solution in the dust settling box 44. This causes the exhaust gas to bubble out of the solution under pressure. The dust settling solution can capture dust particles and some harmful impurities in the exhaust gas, achieving preliminary purification through the wet dust removal principle.

[0034] The electric push rod 472 of the splash shield 47 drives the cover plate 471 to cover the top of the dust collection box 44, allowing treated exhaust gas to pass through only through the exhaust port, while preventing solution from splashing out;

[0035] When the dust settling solution in one of the dust settling boxes 44 reaches saturation, the control cover 471 rises and moves out of the end of the high-temperature corrugated pipe. The stepper motor 45 meshes with the rack 433 at the bottom of the support platform 43 through the gear 46, driving the support platform 43 to slide horizontally in the filter box 41, thereby controlling the other dust settling box 44 to move into the interior of the filter box 41. Then, the control cover 471 covers the top of the dust settling box 44, thereby inserting the end of the high-temperature corrugated pipe into the dust settling solution, realizing a continuous working mode of "one in use and one in standby", avoiding the interruption of exhaust gas treatment by shutdown.

[0036] The exhaust gas, after preliminary treatment with the dust-suppressing solution, overflows through the exhaust hole of the cover plate 471 and enters the filter box 41. It then passes through the activated carbon filter screen 42 for adsorption and purification, removing organic pollutants, odors, etc. from the exhaust gas, and finally meets the emission standards or is recycled.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used only 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. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0038] 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. A ventilation mechanism for a tunnel kiln, comprising a tunnel kiln (1) and a ventilation mechanism, characterized in that: The ventilation system includes a smoke exhaust unit (2), a combustion-supporting unit (3), and a waste gas treatment structure (4). The exhaust gas treatment structure (4) includes a filter box (41), an activated carbon filter (42), a support platform (43), two dust collection boxes (44), a stepper motor (45), a gear (46), and a splash-proof component (47). The filter box (41) is fixedly installed on the top of the tunnel kiln (1). The activated carbon filter (42) is fixedly installed on one side of the filter box (41). The support platform (43) is slidably installed in the filter box (41). The two dust collection boxes (44) are detachably installed on the support platform (43) and contain dust collection solution inside. The stepper motor (45) is fixedly installed on the inner bottom wall of the filter box (41). The gear (46) is fixedly installed on the output shaft of the stepper motor (45) and meshes with the support platform (43). The splash-proof component (47) is installed in the filter box (41) and is used to prevent the dust collection solution from splashing.

2. A ventilation mechanism for a tunnel kiln according to claim 1, characterized in that: The support platform (43) includes a double-cavity mounting platform (431), a rack (433) and two anti-detachment blocks (432). The two anti-detachment blocks (432) are fixedly installed on both sides of the double-cavity mounting platform (431). The two dust collection boxes (44) are installed in the two chambers of the double-cavity mounting platform (431). The rack (433) is fixedly installed at the bottom of the double-cavity mounting platform (431) and meshes with the gear (46).

3. A ventilation mechanism for a tunnel kiln according to claim 1, characterized in that: The splash-proof assembly (47) includes a cover plate (471) and two electric push rods (472). The two electric push rods (472) are fixedly installed inside the filter box (41). The cover plate (471) is fixedly connected to the telescopic ends of the two electric push rods (472). The size of the cover plate (471) is adapted to the top opening of the dust collection box (44).

4. A ventilation mechanism for a tunnel kiln according to claim 3, characterized in that: The exhaust unit (2) includes an air duct, a high-temperature corrugated pipe and an exhaust fan. The air duct is connected to the exhaust fan and the tunnel kiln (1) respectively. The exhaust fan is fixedly installed on the top of the tunnel kiln (1). The high-temperature corrugated pipe is fixedly connected to the exhaust fan. One end of the high-temperature corrugated pipe extends into the interior of the filter box (41).

5. A ventilation mechanism for a tunnel kiln according to claim 4, characterized in that: The cover plate (471) has multiple exhaust holes and a connecting groove. One end of the high-temperature resistant corrugated pipe passes through the connecting groove and extends into the dust-suppressing solution inside the dust-suppressing box (44). The high-temperature resistant corrugated pipe is fixedly connected to the connecting groove.

6. A ventilation mechanism for a tunnel kiln according to claim 1, characterized in that: Both sides of the filter box (41) are provided with through grooves that are adapted to the dust collection box (44), and the inner bottom walls of the two through grooves are provided with guide grooves that are adapted to the size of the support platform (43).

7. A ventilation mechanism for a tunnel kiln according to claim 2, characterized in that: The exhaust unit (2), combustion unit (3) and waste gas treatment structure (4) are all installed on the tunnel kiln (1), and the exhaust unit (2) and waste gas treatment structure (4) are connected to each other.

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