Circulating reciprocating type efficient energy-saving tunnel kiln

Abstract

The invention discloses a circulating reciprocating type efficient energy-saving tunnel kiln, and relates to the technical field of industrial kiln equipment, in particular to a circulating reciprocating type efficient energy-saving tunnel kiln which comprises a rack, a burner is arranged at the outer end of the rack, a lifter is arranged on the inner side of the rack, the upper end of the rack is connected with a lifting trolley, and an energy-saving frame is arranged on the trolley. The end face of the rack is provided with slow-cooling, rapid-cooling, heating and preheating section flue ports, and flues are arranged in the kiln wall and communicated with the flue ports and a burner heat exchange channel. The lifting trolley can rise, advance, descend and return circularly, high-temperature beam columns are carried to support the energy-saving frame, and different flue ports correspond to trolleys of different structures. A closed partition is arranged between the quenching section and the heating section, and only a cooling air channel is reserved in the quenching section. The junction of the trolley and the kiln wall is seamlessly sealed, and a sealing device is additionally arranged at a part of flue openings. The energy-saving frame is composed of cross beams, longitudinal beams, sleeve seats and the like, and stand columns penetrate through penetrating strips to place silicon plates to bear products. A circulating lane is arranged outside the rack, and the frame is transferred through a consignment device.

Description

Technical Field

[0001] This invention relates to the field of industrial kiln equipment technology, specifically a circulating reciprocating high-efficiency energy-saving tunnel kiln. Background Technology

[0002] Tunnel kilns, as continuous high-temperature firing equipment, are widely used in the production of ceramics, refractories, electrical porcelain, abrasives, and some special glass products. Traditional tunnel kilns typically use fixed kiln cars that move unidirectionally along an internal track. The cars enter from the preheating section, are heated to the firing temperature in the heating section, and then cooled in the rapid cooling and slow cooling sections before being ejected as finished products. Their advantages include continuous production and suitability for large-scale, stable operations; however, their disadvantages are also significant—the kiln body is relatively long, resulting in limited space utilization and inefficient heat utilization, especially with a large amount of waste heat being directly discharged in the cooling section, leading to energy waste. Furthermore, traditional kiln cars are bulky, resulting in significant heat loss during entry and exit, and the poor sealing between the kiln car and the kiln wall can easily cause short-circuiting of airflow or uneven temperature distribution within the kiln, affecting product quality stability.

[0003] With energy conservation and emission reduction increasingly becoming core requirements for industrial production, the industry has explored various improvement measures. For example, some designs introduce waste heat from the cooling section into the preheating or drying section to recover some heat through heat exchange; others use lightweight insulation materials to reduce heat dissipation from the kiln; and still others optimize the combustion system to improve combustion efficiency and reduce flue gas emission temperature. However, most of these measures are limited to localized improvements to the existing kiln structure and have failed to fundamentally change the unidirectional movement of kiln cars and the static use of the kiln space. The waste heat recovery path is singular, and the functions of each section of the kiln are relatively fragmented, making it difficult to form a closed-loop thermal energy recycling system.

[0004] On the other hand, traditional tunnel kilns require kiln cars to occupy space outside the kiln for travel, and loading and unloading products largely rely on manual or semi-mechanized operations, limiting production efficiency to the kiln car turnover speed. The frequent movement of kiln cars between high-temperature and low-temperature zones causes repeated heat absorption and dissipation, increasing energy consumption and causing temperature fluctuations within the kiln. For firing processes requiring precise temperature control, these fluctuations reduce product yield and increase defect rates.

[0005] In recent years, some enterprises have explored the concepts of "mobile kiln chambers" or "modular kiln bodies," attempting to allow the frame supporting the green body to be circulated inside and outside the kiln to reduce heat loss from repeated kiln car entry and exit. However, such solutions are often structurally complex, lack reliable sealing and movement, and struggle to ensure airflow isolation and directional heat transfer when switching between multiple temperature ranges, resulting in limited actual energy-saving effects. Furthermore, different firing stages have significantly different requirements for cooling methods and airflow organization—for example, the quenching stage requires high-speed cold air for rapid cooling to fix the crystal structure, while the preheating stage requires slow and uniform heating to prevent the green body from cracking. Traditional kiln bodies cannot simultaneously meet the different chemical conditions of multiple stages without mutual interference within the same space.

[0006] Therefore, a new type of tunnel kiln structure is needed that can maintain continuous production efficiency, significantly improve thermal energy utilization, and enable dynamic reuse of kiln space and independent temperature control in multiple sections. Summary of the Invention

[0007] The purpose of this invention is to provide a reciprocating high-efficiency and energy-saving tunnel kiln. By combining the cyclic movement of the lifting trolley with the segmented flue and the design of the dedicated lifting trolley, the heat circulation path inside the kiln is optimized. Combined with a seamless sealing and independent cooling channel structure, heat loss is reduced, energy utilization is improved, and the problems of high energy consumption and low thermal efficiency of traditional tunnel kilns are solved, so as to achieve high-efficiency and energy-saving firing.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a reciprocating high-efficiency energy-saving tunnel kiln, comprising a frame, wherein a multi-functional burner integrating combustion, high-efficiency heat exchange, and flue gas three-way catalytic conversion is installed at the outer end of the frame. The multi-functional burner is used to input heat into the kiln to create the required high-temperature environment. An elevator is provided on the inner side of the frame, which has a vertical lifting function and can guide displacement along the length of the kiln. A lifting trolley is provided at the upper end of the elevator, which works in conjunction with the elevator to lift, move, and reset the load. An energy-saving frame is provided at the upper end of the lifting trolley, which supports the products to be fired and forms a through-heating space, so that the products are heated evenly at each stage in the kiln and heat loss is reduced.

[0009] Furthermore, the end face of the frame is provided with a slow cooling section flue port, which is distributed at the end of the slow cooling area of ​​the kiln body, allowing the waste heat flue gas of this section to be discharged; the end face of the frame is provided with a rapid cooling section flue port, which is located at the end of the rapid cooling area of ​​the kiln body, and is used to guide the hot air flow generated during the rapid cooling process to be discharged; the end face of the frame is provided with a heating section flue port, which is located at the end of the heating area of ​​the kiln body, and can draw out the heat energy accumulated in the heating section to participate in the circulation; the end face of the frame is provided with a preheating section flue port, which is arranged at the end of the preheating area of ​​the kiln body, and is used to transport the heat accumulated in the preheating area to the outside for reuse.

[0010] Furthermore, the lifting platform is equipped with high-temperature beams that can support the energy-saving frame. The high-temperature beams maintain their shape stability in a high-temperature environment and can evenly distribute the load. The lifting platform can complete the cycle of lifting, moving forward, lowering, and returning. When lifting, it lifts the load off the kiln bottom for movement; when moving forward, it moves the load into the next section; when lowering, it allows the load to land smoothly; and when returning, it resets the platform to the starting position, thus forming a continuous operation process.

[0011] Furthermore, the kiln wall of the frame is pre-installed with a dedicated flue, the flue's orientation conforming to the kiln body sections and maintaining smooth airflow; the flue connects the flue inlets of the slow cooling section, rapid cooling section, heating section, and preheating section with the heat exchange channel of the multi-functional burner, allowing the hot flue gas discharged from each section to converge into the heat exchange channel and exchange heat with the fresh air or fuel supplied by the multi-functional burner, thereby recovering heat and improving overall energy efficiency.

[0012] Furthermore, the frame is equipped with lifting trolleys of different structures at the locations of the flue gas inlets for the slow cooling section, rapid cooling section, heating section, and preheating section. The lifting trolleys at different locations are specifically designed according to the differences in the working conditions of each section in terms of load-bearing capacity, lifting stroke, high-temperature resistant structure, and sealing method, so as to ensure stable operation that matches the temperature and working characteristics of each section.

[0013] Furthermore, a completely enclosed partition structure is provided between the flue gas outlet of the quenching section and the flue gas outlet of the heating section of the frame. The partition structure blocks the direct communication between the airflows on both sides to maintain independent temperature control of the section. The quenching section only retains a dedicated channel for the injection of cooling air. This channel limits the entry path and flow rate of the cooling air, so that the quenching process can cool down quickly without affecting the temperature field stability of other sections.

[0014] Furthermore, the moving joint between the lifting trolley and the kiln wall adopts a seamless sealing structure. The seamless sealing structure keeps the contact surface tight as the trolley moves, preventing hot gas from leaking out of the kiln or cold air from seeping in. The flue gas inlets of the heating section and the preheating section are additionally equipped with sealing devices. The sealing devices are specially designed for the shape and opening and closing frequency of the two inlets to enhance local sealing, reduce heat loss, and stabilize airflow organization.

[0015] Furthermore, the energy-saving frame consists of a base composed of a bottom crossbeam and hollow longitudinal beams. The bottom crossbeam and hollow longitudinal beams are fixedly connected to each other to form a planar support skeleton, which has both strength and lightweight characteristics. The base crossbeam is equipped with a sleeve for inserting the column. The sleeves are arranged at a certain interval and are firmly connected to the crossbeam, which facilitates the quick assembly and positioning of the column.

[0016] Furthermore, the columns of the energy-saving frame are interspersed with strips, which are horizontally arranged between the columns to form a load-bearing grid; silicon plates for supporting the products to be fired are placed on the strips, and the silicon plates are laid flat on the strips to ensure that the products are heated evenly and to avoid direct contact with the frame, which could cause contamination or damage.

[0017] Furthermore, a circulation lane is provided on the outside of the frame, which is arranged around the kiln body and connected to the working area inside the kiln. The circulation lane realizes the transfer of the energy-saving frame between the inner lane and the outer lane through the front and rear transport devices. The front and rear transport devices can move the frame from inside the kiln to the external buffer or loading and unloading area according to the work rhythm, or they can transport it back into the kiln to continue the firing process, thereby forming a continuous circulation of the frame and the product.

[0018] This invention provides a reciprocating high-efficiency and energy-saving tunnel kiln, which has the following beneficial effects: 1. This tunnel kiln, through the installation of a lifting trolley with high-temperature beams and columns and a cyclic operation mechanism, enables the energy-saving frame to complete a closed-loop operation within the kiln, including rising, advancing, lowering, and returning. This replaces the traditional one-way pushing mode of kiln cars, significantly reducing the unnecessary space occupied within the kiln and the energy consumption from repeated material handling. The reciprocating operation allows the product to pass through preheating, heating, rapid cooling, and slow cooling stages sequentially, resulting in a more compact process and enhanced heat transfer continuity. This avoids energy waste caused by frequent kiln temperature fluctuations in intermittent production, significantly improving thermal energy utilization and achieving high-efficiency energy-saving goals.

[0019] 2. The frame end face is equipped with flue gas inlets for slow cooling, rapid cooling, heating, and preheating sections. Dedicated flues are pre-installed within the kiln wall to connect each flue gas inlet with the burner's heat exchange channel. This allows for the targeted recovery of flue gas from different sections of the kiln according to their temperature characteristics: high-temperature flue gas is introduced into the preheating section to assist in preheating the green bodies; medium-temperature flue gas participates in supplementary heating in the heating section; and low-temperature flue gas undergoes rapid and slow cooling sections to adjust the cooling rate while simultaneously recovering waste heat. This segmented flue gas recycling method converts previously lost heat into effective thermal energy, reduces fuel consumption of the multi-functional burner, improves overall thermal efficiency, and aligns with the core of energy-saving design.

[0020] 3. Different lifting trolleys are configured at different flue outlet locations to specifically adapt to the process requirements of each section—for example, the trolley in the quench section enhances the penetration of cooling airflow, the trolley in the preheating section optimizes the flue gas contact area, and the trolley in the heating section improves the stability of heat conduction. Combined with a fully enclosed partition structure between the quench and heating sections (leaving only a dedicated cooling air channel), this prevents airflow crosstalk between sections from disrupting the uniformity of the temperature field, and precisely controls the heat exchange intensity at each stage. This ensures that the product is fired in a suitable temperature and humidity environment, reducing the defect rate while avoiding additional energy losses due to temperature control imbalances.

[0021] 4. The joint between the lifting trolley and the kiln wall adopts a seamless sealing structure. Additional sealing devices are installed at the flue gas inlets of the heating and preheating sections, forming multiple airtight barriers to effectively prevent hot gas leakage and cold air infiltration from the kiln. A stable kiln pressure environment can reduce heat loss, maintain the accuracy of the set temperature in each section, and reduce the energy consumption required for continuous reheating due to heat leakage. At the same time, it prevents external impurities from entering and contaminating the product or interfering with the firing reaction, ensuring consistent product quality and indirectly reducing energy and material waste caused by rework and refiring.

[0022] 5. The energy-saving frame uses hollow longitudinal beams and bottom crossbeams as its base, combined with a modular design for inserting columns into sockets and placing silicon plates through strips. The column spacing and number of strip layers can be flexibly adjusted according to product specifications, adapting to various types and sizes of products awaiting firing. The lightweight frame structure reduces the load on the lifting platform, lowering operating energy consumption. The external circulation lane, combined with front and rear transport devices, enables transfer between internal and external lanes, simplifying product loading and unloading processes, reducing manual and equipment idle time, and improving kiln turnover efficiency. This synergistic approach reduces unit product energy consumption through both reasonable loading and smooth operation, enhancing overall energy-saving benefits. Attached Figure Description

[0023] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0024] Figure 1 This is a plan view of the overall structure of the present invention; Figure 2 This is a front view of the heating section of the present invention; Figure 3 This is a front view of the rapid cooling section of the present invention.

[0025] Figure 4 This is a front view of the preheating / slow cooling section of the present invention; Figure 5 This is a side view of the energy-saving frame of the present invention; Figure 6 This is a front view of the energy-saving frame of the present invention.

[0026] Figure 7 This is a cross-sectional view of the overall structure of the present invention. Figure 1 ; Figure 8 This is a cross-sectional view of the multifunctional burner of the present invention; Figure 9 This is a schematic diagram of the working principle of the multifunctional burner of the present invention.

[0027] Figure 10This is a cross-sectional view of the overall structure of the present invention. Figure 2 .

[0028] Part Name: Frame 1; Multi-functional burner 2; Elevator 3; Lifting trolley 4; Energy-saving frame 5; Slow cooling section flue inlet 6; Rapid cooling section flue inlet 7; Heating section flue inlet 8; Preheating section flue inlet 9. Detailed Implementation

[0029] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses consistent with some aspects of this disclosure as detailed in the appended claims.

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0031] How to use: 1. Equipment Inspection and Preparation: In advance, inspect the overall structural integrity of frame 1, confirming that the kiln wall is undamaged and the connections are well-sealed. Check that the multi-functional burner 2 is in normal standby mode, that there are no leaks in the pipelines, and that the ignition device is functioning properly. Verify the operational flexibility of the elevator 3, ensuring that the lifting trolley 4 can rise and fall smoothly, that its mounted high-temperature beams are free from deformation and damage, and that it can stably support the energy-saving frame 5. Check that the slow cooling section flue duct 6, rapid cooling section flue duct 7, heating section flue duct 8, and preheating section flue duct 9 on the end face of frame 1 are unobstructed, and that the corresponding lifting trolley 4 is well-suited to each flue duct duct. Confirm that the dedicated flue inside the kiln wall of frame 1 is unobstructed and can normally connect the various flue duct ducts to the heat exchange channel of the multi-functional burner 2.

[0032] 2. Loading the Energy-Saving Frame 5: According to the specifications of the product to be fired, insert the uprights into the crossbeam sleeves of the base of the Energy-Saving Frame 5, ensuring the uprights are securely installed. Place the silicon plate stably on the through strips of the uprights, and then arrange the product to be fired in an orderly manner on the silicon plate. Avoid collisions and damage to the products during placement, and ensure that the products are evenly placed to avoid affecting subsequent heat exchange and firing effects.

[0033] 3. Transferring and loading the energy-saving frame 5 into the kiln: The loaded energy-saving frame 5 is transferred from the outer lane to the inner lane via the external circulation lane and front and rear transport devices of the frame 1, aligning it directly above the high-temperature beam column of the lifting platform 4. The lifting machine 3 is started, and the lifting platform 4 is raised to ensure that the high-temperature beam column steadily supports the energy-saving frame 5. After confirming that the energy-saving frame 5 is firmly placed, the lifting machine 3 is stopped.

[0034] 4. Kiln Body Sealing and Parameter Presetting: Check the seamless sealing structure at the joint between the lifting platform 4 and the kiln wall of the frame 1 to ensure a proper seal. Simultaneously confirm that the additional sealing devices at the heating section flue 8 and the preheating section flue 9 are open and properly sealed. Check the closed partition structure between the quenching section flue 7 and the heating section flue 8 to ensure complete sealing, leaving only the dedicated cooling air injection channel unobstructed. Based on the firing requirements of the product to be fired, preset the operating parameters of the multi-functional burner 2 and the ventilation volume of each flue duct.

[0035] 5. Circulating Firing Operation: The multi-functional burner 2 is started to ignite and raise the temperature. Through the dedicated flue inside the frame 1, heat circulation and exchange are achieved through each flue opening. The preheating section flue opening 8 works in conjunction with the burner 2 to complete heat preheating, while the heating section flue opening 8 ensures uniform temperature rise within the kiln. During the firing process, the lifting platform 4 is controlled to operate in a cyclical motion of rising, moving forward, falling, and returning, driving the energy-saving frame 5 to move orderly within the kiln, achieving continuous product firing.

[0036] 6. Cooling and Flue Gas Control: After firing in the heating section, the product enters the rapid cooling section. Through the cooling system corresponding to flue gas inlet 7 in the rapid cooling section, cooling air is injected through a dedicated channel to achieve rapid cooling. Simultaneously, a partition structure prevents cross-flow of hot and cold air. In the later stages of cooling, waste heat is discharged through flue gas inlet 6 in the slow cooling section. This waste heat is recovered through the flue gas duct to the heat exchange channel of the burner 2, achieving energy-saving effects. The flue gas exhaust status of each flue gas inlet is monitored throughout the process to ensure unobstructed flow.

[0037] 7. Discharge and Recycled Operation: After the product cools down, the lifting trolley 4 moves the energy-saving frame 5 to the discharge position. The elevator 3 controls the lifting trolley 4 to descend, separating the high-temperature beams and columns from the energy-saving frame 5. The energy-saving frame 5 is transferred from the inner lane to the outer lane using the front and rear transport devices. The fired product is then removed, and the silicon plate and energy-saving frame 5 are cleaned. Subsequently, the steps of loading, transferring, and entering the kiln are repeated to start the next cycle of firing.

[0038] 8. Shutdown and Maintenance: After the operation is completed, first turn off the multi-functional burner 2, and wait for the kiln temperature to drop naturally to a safe range. Then, close all flue outlets and the cooling system. Check the operating status of the lifting platform 4 and the lifting platform 3, clean all flue outlets and dedicated flues, check for wear on the sealing structure, and maintain or replace them as needed. Transfer the energy-saving frame 5 to the designated location for storage, tidy up the circulation lane, and ensure that the equipment is in standby mode.

[0039] Example 1: This example is designed for small to medium-sized ceramic product firing scenarios, and is equipped with a reciprocating high-efficiency energy-saving tunnel kiln adapted to this scenario. The frame 1 adopts an integrated molding structure, which has strong overall stability and can effectively bear the operating load of each component. The multi-functional burner 2 at the outer end of the frame 1 adopts a segmented ignition control design, which can adjust the combustion range according to the firing requirements. In conjunction with the dedicated flue reserved inside the kiln wall of the frame 1, it can achieve precise heat delivery. The elevator 3 on the inner side of the frame 1 works in conjunction with the lifting trolley 4. The high-temperature beams and columns carried by the lifting trolley 4 are made of high-temperature resistant materials, which can adapt to the high-temperature environment during ceramic product firing and stably support the energy-saving frame 5.

[0040] The slow cooling section flue 6, rapid cooling section flue 7, heating section flue 8, and preheating section flue 9 on the end face of frame 1 correspond to different functional areas of the kiln body. Dedicated flues tightly connect each flue vent to the heat exchange channel of the multi-functional burner 2, achieving efficient recovery and reuse of waste heat. The completely enclosed partition structure between the rapid cooling section flue 7 and the heating section flue 8 effectively prevents cross-flow of hot and cold air, ensuring that cooling air is only sprayed through a dedicated channel in the rapid cooling section, thus improving the uniformity of cooling of ceramic products. The seamless sealing structure at the joint between the lifting trolley 4 and the kiln wall of frame 1, combined with the sealing devices installed at the heating section flue 8 and the preheating section flue 9, significantly reduces heat loss.

[0041] The energy-saving frame 5 consists of a stable base composed of a bottom crossbeam and hollow longitudinal beams. The sleeves on the base crossbeams are precisely fitted to the column installation, and the spacing of the through strips on the columns is adapted to the placement requirements of ceramic products. Silicon plates are laid flat on the through strips, providing a stable bearing surface for the ceramic products. The external circulation lane of the frame 1 adopts a two-way design, and the front and rear transport devices can flexibly realize the transfer of the energy-saving frame 5 between the inner and outer lanes. In conjunction with the lifting, forward, lowering, and returning cyclical movements of the lifting platform 4, continuous firing of ceramic products is realized, balancing firing efficiency and energy-saving effects.

[0042] Example 2: This example is applicable to refractory material firing scenarios, optimizing the high-temperature resistance and load-bearing capacity of each component of the equipment. The frame 1 is constructed using high-strength, high-temperature resistant steel, and the kiln wall thickness has been specifically designed. Combined with the layout of the internal dedicated flue, heat retention and circulation efficiency are enhanced. The burner 2 is selected from high-calorific-value types suitable for refractory material firing requirements, and its heat exchange channels are precisely connected to the dedicated flue to ensure that heat is fully transferred to all areas within the kiln.

[0043] The lifting platform 3 adopts a dual-drive structure, which improves the load-bearing capacity and operational stability of the lifting platform 4. The high-temperature beams and columns mounted on the lifting platform 4 have been reinforced to accommodate the overall weight of the refractory materials and energy-saving frame 5. Different structures of lifting platforms 4 are configured for the positions of the flue gas inlets corresponding to the frame 1. The lifting platforms 4 corresponding to the flue gas inlets 8 in the heating section and 9 in the preheating section have further enhanced sealing adaptability, forming a double-seal protection with the additional sealing devices to reduce heat leakage under high-temperature conditions.

[0044] The base crossbeams and hollow longitudinal beams of the energy-saving frame 5 are made of corrosion-resistant and high-temperature-resistant silicon carbide. The connection between the sleeve and the column adopts a snap-fit ​​structure, which improves assembly stability and prevents the column from shifting due to vibration during firing. The threading strips are made of high-strength ceramic material, and the thickness of the silicon plate is adapted to the weight of the refractory material to ensure no deformation during load-bearing. The external circulation lane of the frame 1 adopts a wear-resistant and anti-slip design, and the front and rear transport devices are equipped with a buffer structure to reduce vibration when transporting the energy-saving frame 5 and prevent damage to the refractory material blanks. Combined with the cyclic movement of the lifting trolley 4, it achieves efficient firing of the refractory material.

[0045] Example 3: This example focuses on the firing scenario of new building materials, emphasizing the optimization of equipment flexibility and energy efficiency. The frame 1 adopts a modular design, and the length of each functional area can be adjusted according to the firing specifications of the building materials. The multi-functional burner 2 at the outer end of the frame 1 is equipped with an intelligent control module, which can automatically adjust the combustion state according to the temperature changes in the kiln, and achieve heat recycling in conjunction with a dedicated flue to reduce energy consumption.

[0046] The lifting platform 3 adopts variable frequency drive technology, which can precisely control the lifting speed and position of the lifting carriage 4. The high-temperature beams and columns of the lifting carriage 4 are designed to be detachable, facilitating subsequent maintenance and replacement. Each flue outlet on the end face of the frame 1 is equipped with a detachable filter structure, which can effectively prevent impurities generated during the firing of building materials from clogging the flue and ensure unobstructed heat exchange channels. The cooling air jet channel of the rapid cooling section flue outlet 7 adopts a multi-outlet design, which improves cooling efficiency while ensuring cooling uniformity. The closed partition structure uses high-temperature resistant seals to enhance the sealing effect.

[0047] The base of the energy-saving frame 5 features a hollow design to reduce heat obstruction and improve heat transfer efficiency. The installation position of the mounting bracket on the crossbeam is adjustable to accommodate the installation requirements of columns of different specifications, thereby meeting the placement needs of building materials of different sizes. The connection between the through strip and the column adopts a sliding structure, allowing for flexible adjustment of the spacing. The surface of the silicon plate is treated with anti-slip material to prevent the building material blanks from shifting during transportation and firing. The external circulation lane of the frame 1 is equipped with a diversion area, and the front and rear transport devices can simultaneously transport multiple sets of energy-saving frames 5. Combined with the cyclical movement of the lifting trolley 4, this improves the batch firing efficiency of building materials. Example

[0048] This embodiment is applicable to the firing of precision ceramic components, focusing on improving the operational accuracy and sealing performance of the equipment. The frame 1 is precision-machined, with a smooth inner wall to reduce heat conduction loss. The multi-functional burner 2 at the outer end of the frame 1 employs precision ignition control technology, coupled with a temperature monitoring module, to achieve precise temperature control within the kiln. The dedicated flue features a streamlined design to reduce heat flow resistance, ensuring efficient connection between each flue outlet and the heat exchange channel of the multi-functional burner 2, thereby improving waste heat recovery efficiency.

[0049] The elevator 3 is equipped with a high-precision positioning module, which can control the lifting error of the lifting trolley 4 to a very small range. The surface of the high-temperature beams and columns mounted on the lifting trolley 4 is flattened to ensure a good fit with the energy-saving frame 5 and to avoid damage to the precision ceramic components due to uneven stress. The seamless sealing structure at the joint between the lifting trolley 4 and the kiln wall of the frame 1 uses a high-temperature resistant flexible sealing material, which ensures a good sealing effect without affecting the cyclic movement of the lifting trolley 4. The sealing devices of the flue gas inlet 8 in the heating section and the flue gas inlet 9 in the preheating section adopt an automatic control design, which can automatically adjust the sealing degree according to the firing progress.

[0050] The base crossbeam and hollow longitudinal beam of the energy-saving frame 5 are integrally molded to improve overall rigidity. The fit clearance between the sleeve and the column is precisely controlled to ensure that the column does not wobble after installation. The through strip is made of high-precision machining with a high surface flatness. The silicon plate is made of high-purity ceramic material to reduce contamination of precision ceramic components during firing. The external circulation lane of the frame 1 adopts a precise guidance design, and the front and rear transport devices are equipped with positioning sensors to accurately transfer the energy-saving frame 5 to the top of the lifting trolley 4. With the cyclic movement of the lifting trolley 4, high-quality firing of precision ceramic components is achieved. Example

[0051] This embodiment is designed for small-batch, batch-fired craft production scenarios, optimizing the equipment's convenience and versatility. The frame 1 has a compact structure and small footprint, making it suitable for small production sites. The multi-functional burner 2 at the outer end of the frame 1 features a miniaturized design while ensuring combustion efficiency. Its heat exchange channel and dedicated flue are connected using a quick-connect structure, facilitating installation and maintenance.

[0052] The lifting platform 3 is easy to operate, equipped with both manual and automatic control modes. The number of high-temperature beams on the lifting trolley 4 can be flexibly increased or decreased according to the size of the energy-saving frame 5, improving the equipment's versatility. The flue outlets on the end face of the frame 1 have a simple structure, making them easy to clean. The dedicated flue adopts a detachable design, allowing for regular cleaning and maintenance to prevent impurities from accumulating and affecting heat exchange efficiency. The sealed partition structure between the quench section flue outlet 7 and the heating section flue outlet 8 is made of lightweight, high-temperature resistant material, ensuring sealing performance while reducing the overall weight of the equipment.

[0053] The energy-saving frame 5 features a lightweight design while maintaining load-bearing strength. The base beam's mounting brackets can accommodate various column sizes, facilitating structural adjustments based on craft dimensions. The strips are easy to disassemble, and the silicon plates can be flexibly replaced according to the craft's shape. The external circulation lane design of the frame 1 is simple, and the front and rear transport devices are easy to operate, enabling rapid transfer of the energy-saving frame 5. Combined with the lifting, forward, lowering, and returning cyclical movements of the lifting platform 4, it meets the needs of batch firing of small crafts, balancing production efficiency and energy saving while reducing the difficulty of equipment operation.

[0054] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A reciprocating high-efficiency energy-saving tunnel kiln, comprising a frame (1), characterized in that: The outer end of the frame (1) is provided with a multi-functional burner (2), the inner side of the frame (1) is provided with a lift (3), the upper end of the lift (3) is provided with a lifting trolley (4), and the upper end of the lifting trolley (4) is provided with an energy-saving frame (5).

2. The circulating reciprocating high-efficiency energy-saving tunnel kiln according to claim 1, characterized in that: The end face of the frame (1) is provided with a slow cooling section flue port (6), the end face of the frame (1) is provided with a rapid cooling section flue port (7), the end face of the frame (1) is provided with a heating section flue port (8), and the end face of the frame (1) is provided with a preheating section flue port (9).

3. The circulating reciprocating high-efficiency energy-saving tunnel kiln according to claim 1, characterized in that: The lifting platform (4) is equipped with high-temperature beams that can support the energy-saving frame (5), and the lifting platform (4) can complete the cycle of lifting, moving forward, lowering and returning.

4. The circulating reciprocating high-efficiency energy-saving tunnel kiln according to claim 1, characterized in that: The kiln wall of the frame (1) has a reserved dedicated flue, which can connect the slow cooling section flue (6), the rapid cooling section flue (7), the heating section flue (8) and the preheating section flue (9) with the heat exchange channel of the multi-functional burner (2).

5. The circulating reciprocating high-efficiency energy-saving tunnel kiln according to claim 1, characterized in that: The frame (1) is equipped with lifting trolleys (4) with different structures at the positions of the slow cooling section flue gas inlet (6), the rapid cooling section flue gas inlet (7), the heating section flue gas inlet (8), and the preheating section flue gas inlet (9).

6. The circulating reciprocating high-efficiency energy-saving tunnel kiln according to claim 1, characterized in that: The frame (1) has a completely enclosed partition structure between the flue gas outlet (7) of the quench section and the flue gas outlet (8) of the heating section. The quench section only retains a dedicated channel for the injection of cooling air.

7. The circulating reciprocating high-efficiency energy-saving tunnel kiln according to claim 1, characterized in that: The moving joint between the lifting platform (4) and the kiln wall of the frame (1) adopts a seamless sealing structure, and the flue gas inlet (8) of the heating section and the flue gas inlet (9) of the preheating section are additionally equipped with sealing devices.

8. The circulating reciprocating high-efficiency energy-saving tunnel kiln according to claim 1, characterized in that: The energy-saving frame (5) consists of a base composed of a bottom crossbeam and a hollow longitudinal beam, and a sleeve for inserting the column is installed on the base crossbeam.

9. The circulating reciprocating high-efficiency energy-saving tunnel kiln according to claim 1, characterized in that: The columns of the energy-saving frame (5) are pierced with strips, and silicon plates for supporting the products to be fired are placed on the strips.

10. The circulating reciprocating high-efficiency energy-saving tunnel kiln according to claim 1, characterized in that: The frame (1) is provided with a circulation lane on the outside. The circulation lane realizes the transfer of the energy-saving frame (5) between the inner lane and the outer lane through the front and rear transport devices.

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