An intelligent energy-saving combustion system specifically designed for ceramic roller kilns

Abstract

The present invention discloses an energy-saving, low-carbon combustion system specifically designed for a ceramic roller kiln. The system comprises a furnace body, a roller conveyor belt, a circulating fan, and a heat exchanger. The furnace body is divided into three sections: a low-temperature section, a medium-temperature section, and a high-temperature section by a retaining wall. A heat exchanger is installed at the flue gas outlet of the low-temperature section, an air pipe is connected to the air inlet of the heat exchanger, and the air outlet of the heat exchanger is connected to a hot air pipe via a conveying pipe. The hot air pipe is connected to the burners in the medium-temperature and high-temperature sections. The medium-temperature section is provided with a heat introduction port connected to the circulating fan, which is connected to the furnace of the low-temperature section via a conveying pipe. The roller conveyor belt passes through the furnace body, and a ceramic honeycomb is installed in the medium-temperature section. The present invention has the following beneficial effects: improving the flue gas waste heat absorption rate; increasing the heat absorption of ceramic tiles while also improving the thermal efficiency of the ceramic kiln; meeting heating requirements and saving a large amount of fuel.

Description

Technical Field

[0001] The present invention relates to the technical field of energy conservation and emission reduction of ceramic roller kilns, and in particular to an intelligent energy-saving combustion system dedicated to ceramic roller kilns. Background Art

[0002] Currently, most ceramic roller kilns use natural gas as fuel. Natural gas is widely used due to its high calorific value and environmental friendliness. However, natural gas is expensive and has a high carbon content, which significantly increases operating costs and CO2 emissions for ceramic roller kilns. Furthermore, the kiln's thermal efficiency cannot be displayed online, making it impossible to adjust the kiln's combustion conditions in real time based on the kiln's efficiency. Furthermore, the kiln's waste heat is not fully utilized, resulting in high energy consumption.

[0003] A Chinese invention patent application with publication number CN102721276A discloses an energy-saving transformation system for a ceramic kiln. The furnace of the kiln is divided into a preheating zone, a sintering zone, and a cooling zone in sequence. The sintering zone is provided with a number of burners. The preheating zone is connected to a power generation device, which uses the high-temperature air in the preheating zone to generate electricity. The exhaust flue gas from the power generation device is introduced into the furnace of the preheating zone. The furnace of the preheating zone is provided with a number of retaining walls arranged alternately to extend the air flow in the preheating zone. Although the above technical solution can fully utilize the high-temperature package energy in the preheating zone to effectively recycle and utilize heat sources, greatly saving energy and reducing heat loss and environmental pollution, the energy of the sintering zone and the cooling zone is not fully utilized, and the thermal efficiency, waste heat absorption rate, and carbon dioxide emissions of the ceramic kiln need to be further improved. In addition, the ceramic kiln is not equipped with an intelligent control system.

[0004] In addition, existing ceramic kilns all use relatively simple automatic interlocking control of fuel burners and furnace temperature. That is, when the furnace temperature reaches the specified value, the fuel burner is shut down, but the combustion air is not shut down, which will cause excessive power consumption of the fan and increase energy consumption. Summary of the Invention

[0005] The purpose of the present invention is to provide an intelligent energy-saving combustion system for ceramic roller kilns in response to the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above purpose, the technical solution adopted by the present invention to solve the above technical problems is: a special intelligent energy-saving combustion system for ceramic roller kiln, comprising a furnace body, a roller conveyor belt 2, a circulating fan 6 and a heat exchanger 3, a retaining wall 4 is installed in the furnace body, and the furnace is divided into three sections: a low-temperature section 81, a medium-temperature section 82 and a high-temperature section 83 by the retaining wall 4; a heat exchanger 3 is installed at the flue gas outlet of the low-temperature section 81, an air pipe is connected to the air inlet of the heat exchanger 3, and the air outlet of the heat exchanger 3 is connected to the hot air outlet through a conveying pipe. The hot air pipe 5 is connected to the medium temperature section 82 and the burner 9 in the high temperature section 83 through a branch pipe; the medium temperature section 82 is provided with a heat introduction port connected to the circulation fan 6, and the circulation fan 6 is connected to the furnace of the low temperature section 81 through a conveying pipe, so that the flue gas with a temperature of 500°C at the lower part of the medium temperature section 82 is introduced into the low temperature section 81; the roller conveyor belt 2 passes through the furnace body, and the tile blank 1 passes through the low temperature section 81, the medium temperature section 82 and the high temperature section 83 in the furnace body on the roller conveyor belt 2 in turn for heating and sintering treatment.

[0007] Preferably, an ammonia tank 13 is further included, which is connected to the hot air pipe 5. A small amount of ammonia (NH3) accounting for 15-25% of the volume of the natural gas flow is input into the hot air pipe 5 and mixed with hot air and then burned together with the natural gas. Since NH3 does not contain the C element, the carbon dioxide emissions of the kiln can be effectively reduced.

[0008] The retaining wall 4 is installed on the upper inner wall and the lower inner part of the furnace body, and has a through hole for the roller conveyor belt 2 to pass through.

[0009] Preferably, a ceramic honeycomb body 7 is installed in the medium temperature section 82 .

[0010] Preferably, a flue gas drainage channel composed of a retaining wall 4 and the interior of the upper part of the furnace body is provided at the upper part of the medium temperature section 82, and a plurality of ventilation holes are provided at the lower part of the flue gas drainage channel. A plurality of ceramic honeycomb bodies 7 are installed at the lower part of the ventilation holes on the retaining wall at the lower part of the flue gas drainage channel, and the ceramic honeycomb bodies 7 are located above the ceramic tile body 1 and closer to the ceramic tile body 1.

[0011] The retaining wall 4 consists of a vertical part connected to the inner wall of the furnace body and a horizontal part connected to the upper end of the vertical part. The two sides of the horizontal part are connected to the side walls of the furnace body, and the other end is connected to the retaining wall 4 between the low-temperature section 81 and the medium-temperature section 82. The horizontal part and the upper wall of the furnace body form the flue gas drainage channel for draining flue gas and installing the ceramic honeycomb body 7.

[0012] Preferably, an online checkweigher 10 is provided on the roller conveyor belt 2 outside the furnace outlet for accurately weighing the heated tile body 1 in real time.

[0013] The online checkweighing scale includes a control and display terminal 14, a frame 12, and a workbench arranged on the frame 12. A checkweighing platform 31, a waiting-for-inspection platform 21, and a completed-inspection platform 22 are arranged on the workbench. The waiting-for-inspection platform 21 and the completed-inspection platform 22 are respectively located on both sides of the checkweighing platform 31, wherein the waiting-for-inspection platform 21 is located on the feeding side of the checkweighing platform 31, and the completed-inspection platform 22 is located on the discharging side of the checkweighing platform 31; the checkweighing platform 31 is composed of two weighing units connected in series; a weighing sensor is arranged in the weighing unit and is connected to a data processing unit arranged in the frame 12, and the data processing unit is connected to a signal transmission module 11 installed on the frame. The signal transmission module 11 is wirelessly connected to the control and display terminal 14, so that remote online real-time viewing of weighing data can be realized.

[0014] Electric dampers are installed on the natural gas pipeline, hot air pipeline and ammonia pipeline.

[0015] A negative pressure sensor is installed within the high-temperature section 83. Both the negative pressure sensor and the circulating fan 6 are connected to a control unit, which automatically interlocks and controls the process based on corresponding parameters. For example, when the natural gas consumption per unit area of tiles exceeds the ideal value, the circulating fan frequency is increased, allowing the tiles to release more heat from the smoke and reducing natural gas consumption. When the natural gas consumption per unit area of tiles falls below the ideal value, the circulating fan frequency is decreased to prevent negative pressure in the ceramic kiln and excessive fan power consumption, which would otherwise increase energy consumption.

[0016] This application adds a secondary radiation heating device and an online detection device for the thermal efficiency of the ceramic kiln, and adopts a mixed combustion method of ammonia and natural gas. This can effectively reduce the operating costs and carbon dioxide emissions of the ceramic roller kiln. On the basis of the above technical solution, this application also adds an online display function for thermal efficiency and an automatic interlocking control function for the furnace negative pressure and flue gas recirculation fan. A negative pressure sensor is set in the high-temperature section of the ceramic kiln, and an online display system for the natural gas consumption (thermal efficiency) of ceramic tiles per unit area is installed. First, an ideal natural gas consumption per unit area of ceramic tiles is set, and then the frequency of the flue gas recirculation fan is changed through feedback control to maintain the natural gas consumption (thermal efficiency) of ceramic tiles per unit area constant near the ideal value.

[0017] Compared with the prior art, the present invention has the following beneficial effects: it adopts a forced exhaust heat recovery method; at the same time, a retaining wall is installed in the ceramic kiln, and the scouring heat exchange method between the flue gas and the ceramic tile is changed from longitudinal scouring heat exchange to transverse scouring heat exchange through the retaining wall, and the heat exchange effect is significantly enhanced; the scouring speed is also significantly increased under the action of the circulating fan, the heat exchange coefficient between the flue gas and the ceramic tile is increased, the flue gas flows without dead angles, and the flue gas waste heat absorption rate is improved; the ceramic honeycomb fully absorbs the heat of the high-temperature flue gas, and its own temperature rises sharply to 850°C, which can not only completely burn the residual carbon particles in the flue gas, but also form secondary radiation heating for the ceramic tiles in the medium temperature section, which improves the thermal efficiency of the ceramic kiln while increasing the heat absorption of the ceramic tiles; the flue gas in the medium temperature section and the ceramic tiles The horizontal flushing heat exchange is carried out, and its heat exchange intensity is much higher than the original longitudinal flushing. At the same time, the high-temperature ceramic honeycomb body performs secondary radiation heating on the ceramic tiles. Therefore, only a small number of natural gas burners need to be turned on in the medium temperature section to meet the heating requirements, saving a lot of fuel. Moreover, this technology adopts natural gas and combustion-supporting hot air interlocking control. Electric dampers are installed on a single natural gas burner pipeline and its corresponding hot air branch. When the natural gas burner stops burning, the electric valve on the corresponding hot air branch is also closed accordingly. This completely eliminates the current common phenomenon that a large amount of low-temperature combustion-supporting air is continuously blown into the ceramic kiln after the natural gas burner is shut down, thereby causing increased energy consumption. The kiln temperature can be maintained for a long time, and fuel consumption will be further reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of an intelligent energy-saving combustion system dedicated to ceramic roller kilns of the present invention;

[0019] Figure 2 It is the structural diagram of the online checkweigher. DETAILED DESCRIPTION

[0020] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments. The accompanying drawings illustrate the specific structure of a preferred embodiment of the present invention. The structural features of the various components, and any descriptions of directions (up, down, left, right, front, and back), are based on the illustrated structures, but the actual use of the present invention is not limited to these directions.

[0021] A special intelligent energy-saving combustion system for ceramic roller kilns, such as Figure 1As shown, it includes a furnace body, a roller conveyor belt 2, a circulating fan 6 and a heat exchanger 3. A retaining wall 4 is installed in the furnace body, and the retaining wall 4 divides the furnace into three sections: a low-temperature section 81, a medium-temperature section 82 and a high-temperature section 83; a heat exchanger 3 is installed at the flue gas exhaust port of the low-temperature section 81, and an air pipe is connected to the air inlet of the heat exchanger 3. The air outlet of the heat exchanger 3 is connected to the hot air pipe 5 through a conveying pipe, and the hot air pipe 5 is connected to the burners 9 in the medium-temperature section 82 and the high-temperature section 83 through a branch pipe. The 30°C air is heated by the exhaust flue gas from the low-temperature section 81 through the heat exchanger 3 to form 180°C hot air which is input into the hot air pipe 5, and then the hot air pipe 5 is distributed to each burner 9 through the branch pipe for combustion assistance. In addition, the present application also includes an ammonia tank 13, which is connected to the hot air pipe 5. A small amount of ammonia (NH3) accounting for 15-25% of the volume of the natural gas flow is input into the hot air pipe 5 to mix with the hot air and burn together with the natural gas. Since NH3 does not contain carbon elements, it can effectively reduce the emission of carbon dioxide from the kiln. The medium temperature section 82 is provided with a heat inlet connected to the circulation fan 6. The circulation fan 6 is connected to the furnace of the low temperature section 81 through a conveying pipe, and the flue gas with a temperature of 500°C at the bottom of the medium temperature section 82 is introduced into the low temperature section 81, effectively recycling part of the flue gas waste heat. At the same time, the heat flushing direction of the medium temperature section 82 is changed (from longitudinal to transverse) to improve the heating efficiency. The roller conveyor 2 passes through the furnace body, and the tile blank 1 passes through the low temperature section 81, medium temperature section 82 and high temperature section 83 in the furnace body on the roller conveyor 2 in sequence for heating and sintering. The retaining wall 4 is installed on the upper inner wall and lower interior of the furnace body and has a through hole for the roller conveyor belt 2 to pass through. The retaining wall 4 changes the scouring heat exchange mode between the flue gas and the tile body 1 from longitudinal scouring heat exchange to transverse scouring heat exchange. The scouring speed is also significantly increased by the action of the flue gas circulating fan 6, which increases the heat transfer coefficient between the flue gas and the tile body 1, eliminates dead angles in the flue gas flow, and greatly improves the flue gas waste heat absorption rate. Among them, a ceramic honeycomb body 7 is installed in the medium temperature section 82. After absorbing heat, the ceramic honeycomb body 7 realizes secondary radiation heating of the tiles, which can effectively maintain the temperature in the medium temperature section 82 and the heat exchange efficiency between the flue gas and the tile body 1. Preferably, a flue gas drainage channel consisting of a retaining wall 4 and the interior of the upper part of the furnace body is provided at the upper part of the medium-temperature section 82, a plurality of ventilation holes are provided at the lower part of the flue gas drainage channel, and a plurality of the ceramic honeycomb bodies 7 are installed below the ventilation holes at the lower part of the flue gas drainage channel, and the ceramic honeycomb bodies 7 are located above the ceramic tile body 1 and closer to the ceramic tile body 1. Preferably, within the medium-temperature section 82, the retaining wall 4 consists of a vertical portion connected to the inner wall of the furnace body and a horizontal portion connected to the upper end of the vertical portion. The horizontal portion is connected to the side walls of the furnace body on both sides, and the other end is connected to the retaining wall 4 between the low-temperature section 81 and the medium-temperature section 82. The horizontal portion and the upper wall of the furnace body form the flue gas drainage channel for draining flue gas and installing the ceramic honeycomb bodies 7.

[0022] An online checkweigher 10 is provided on the roller conveyor belt 2 outside the furnace outlet for accurately weighing the heated tile body 1 in real time. Figure 2 As shown, it includes a control and display terminal 14, a frame 12, and a workbench arranged on the frame 12. The workbench is provided with a check weight platform 31, a waiting inspection platform 21, and a completed inspection platform 22. The waiting inspection platform 21 and the completed inspection platform 22 are respectively located on both sides of the check weight platform 31, wherein the waiting inspection platform 21 is located on the feeding side of the check weight platform 31, and the completed inspection platform 22 is located on the discharging side of the check weight platform 31; the check weight platform 31 is composed of two weighing units connected in series. A weighing sensor is provided in the weighing unit and is connected to a data processing unit provided in the frame 12. The data processing unit is connected to a signal transmission module 11 installed on the frame. The signal transmission module 11 is wirelessly connected to the control and display terminal 14, so that the weighing data can be viewed remotely online in real time. The signal transmission module 11 can be a wireless transmitter. A first transmission belt 24 is installed on the waiting inspection platform 21 and the completed inspection platform 22 and is connected to the roller conveyor belt 2. A first motor is installed on the frame 12 and is connected to and drives the first transmission belt 24. Each weighing unit includes a weighing base, a weighing sensor, a second conveyor belt, and a second motor. The second motor is connected to and drives the second conveyor belt to transport it toward the inspection platform 22. The weighing sensor is installed in the weighing frame, which is installed on the weighing base. The items to be tested on the second conveyor belt are weighed by the weighing frame, and the corresponding weighing data is transmitted to the data processing unit for processing through the weighing sensor. Vibration isolation pads are installed between the weighing units to separate them from each other to prevent various modal resonances generated by the mechanical structure, thereby ensuring that the data bits of each weighing unit are independent and identically distributed. A first photoelectric detection device 41 is provided at the feed end of the weighing unit to determine whether the items to be tested have entered the weighing unit and can also count them. A second photoelectric detection device 42 is provided at the discharge end of the weighing unit to determine whether the weighing work is completed. The first photoelectric detection device 41 and the second photoelectric detection device 42 are respectively connected to the data processing unit. Preferably, the photoelectric detection device 41 is installed at the same position on the two weighing units to detect the trigger data for weighing, which serves as the start and end signals for starting each weighing platform. Preferably, the weighing surfaces of the two weighing units are at the same horizontal position to effectively improve accuracy. The weighing units connected in series use the same motor, belt, motor-driven synchronous belt, and resistance strain gauge sensor, and adopt the same mechanical structure, and are fixed together on a weighing bracket. The inspection platform 22 is connected to the roller conveyor belt 2 to transport the weighed tile blanks 1.

[0023] The present invention adopts a forced exhaust waste heat recovery method. By installing a circulating fan 6 outside the furnace body and a retaining wall 4 inside the furnace body, the retaining wall 4 divides the furnace body of the ceramic kiln into three sections: a low-temperature section 81, a medium-temperature section 82, and a high-temperature section 83. Under the suction action of the circulating fan 6, the high-temperature flue gas and the ceramic tiles change the flushing heat exchange mode from longitudinal flushing heat exchange to transverse flushing heat exchange. The flushing speed is also significantly increased under the action of the circulating fan 6, the heat exchange coefficient between the flue gas and the ceramic tiles increases, the flue gas flow has no dead angle, and the flue gas waste heat absorption rate is improved. A ceramic honeycomb body 7 is installed in the medium-temperature section 82 to achieve secondary radiation heating of the ceramic tiles. Under the suction action of the circulating fan 6, the high-temperature flue gas in the high-temperature section 83 of the ceramic kiln, which is as high as 1100°C, passes through the ceramic honeycomb body 7 at a low speed to release heat and then the temperature drops to 800°C. The ceramic honeycomb 7 fully absorbs the heat from the high-temperature flue gas, rapidly raising its own temperature to 850°C. This creates secondary radiant heating for the tiles in the medium-temperature section 82, increasing the tiles' heat absorption while also improving the thermal efficiency of the ceramic kiln. The flue gas in the medium-temperature section 82 undergoes horizontal heat exchange with the tiles, a far greater intensity than the original longitudinal heat exchange. The 800°C flue gas releases heat to the tiles before dropping to 500°C before entering the low-temperature section 81. Simultaneously, the high-temperature ceramic honeycomb 7 provides secondary radiant heating for the tiles. Therefore, only a small number of natural gas burners 9 need to be activated in the medium-temperature section 82 to meet heating requirements, saving significant fuel. An automatic online checkweigher 10 is installed at the ceramic kiln outlet. Based on the weight, thickness, and density of the tiles, the surface area of the tiles can be calculated. Specifically, the tile material is fixed, with a known density and thickness, both of which are determined when the tile body 1 is produced. The online checkweigher 10 accurately determines the tile weight. Dividing the tile weight by the density and thickness yields the tile area, which can be displayed online on the display module. At the same time, a natural gas flow meter is installed on the natural gas main, which measures the natural gas flow and displays the measurement results online on the display module.

[0024] By dividing the natural gas flow rate by the tile area, we can calculate the natural gas consumption per unit area of tile, which is another expression for the thermal efficiency of the ceramic kiln. The result is displayed online on the display module, enabling online display of the thermal efficiency of the ceramic kiln, which can reflect the level of the kiln's thermal efficiency. Based on the test value of the kiln's thermal efficiency, it can be accurately determined whether the kiln needs maintenance.

[0025] A negative pressure sensor is provided in the high-temperature section 83. The negative pressure sensor and the circulating fan 6 are respectively connected to a control unit, and the control unit automatically interlocks and controls the corresponding parameters. The negative pressure value of the high-temperature section 83 is set between -20Pa and -30Pa. If the negative pressure in the high-temperature section 83 is lower than the limit value (for example, reaching -40Pa), the frequency of the circulating fan 6 is reduced, reducing the negative pressure in the furnace; conversely, if the negative pressure in the high-temperature section is lower than the limit value (for example, reaching -10Pa), the frequency of the circulating fan 6 is increased, increasing the negative pressure in the furnace.

[0026] Because at present, ordinary ceramic kilns all use semi-automatic interlocking control of the fuel burner 9 and the furnace temperature, that is, when the furnace temperature reaches the specified value, the fuel burner is shut down, but the combustion air is not shut down. On this basis, the present application also adds an online display of thermal efficiency, as well as the automatic interlocking control function of the furnace negative pressure and the recirculation fan. By setting an ideal natural gas consumption per unit area of ceramic tiles, and then changing the frequency of the circulating fan through feedback control, the natural gas consumption per unit area of ceramic tiles (thermal efficiency) is maintained constant near the ideal value. For example, when the natural gas consumption per unit area of ceramic tiles is higher than the ideal value, the frequency of the flue gas recirculation fan increases accordingly, allowing the ceramic tiles to emit more heat from the flue gas and reduce unit consumption; when the natural gas consumption per unit area of ceramic tiles is lower than the ideal value, the frequency of the flue gas recirculation fan decreases accordingly to avoid causing excessive negative pressure in the ceramic kiln and excessive power consumption of the fan, thereby increasing energy consumption.

[0027] Using a hot air combustion method, a heat exchanger 3 is installed at the outlet of the low-temperature section 81 of the ceramic kiln to absorb the waste heat from the ceramic kiln's exhaust gas to generate hot air for the natural gas burner 9 to assist in combustion. After heat exchange, the flue gas temperature is reduced from 300°C to 120°C. The 30°C cold air absorbs heat and becomes 180°C hot air, which is then transported through the pipeline to the natural gas burner 9 for combustion, achieving significant energy-saving effects. Electric dampers are installed on each natural gas pipeline and the corresponding hot air branch pipe. When the furnace temperature reaches the specified value, the natural gas burner 9 and the corresponding hot air branch pipe are shut down. This completely eliminates the current phenomenon of large amounts of low-temperature combustion air continuously being blown into the ceramic kiln after the natural gas burner is shut down, thereby increasing energy consumption. The kiln temperature can be maintained for a long time, further reducing fuel consumption.

[0028] The following is a test record of output and energy consumption in a specific embodiment of the intelligent energy-saving combustion system for ceramic roller kilns of this application, as shown in the following table:

[0029] Tile type: 800╳800 microcrystalline stone

[0030]

[0031]

[0032] According to the data in the above table, the average energy saving rate of this application can be calculated as: (2.95-2.625) / 2.95×100%=11%.

[0033] The above is only a preferred embodiment of the present invention and should not be used to limit the scope of implementation of the present invention. In other words, any simple equivalent changes and modifications made according to the scope of the patent application and the content of the invention description are still within the scope of the patent of the present invention.

Claims

1. An intelligent energy-saving combustion system for ceramic roller kilns, characterized by: It includes a furnace body, a roller conveyor belt (2), a circulating fan (6), an ammonia tank (13) and a heat exchanger (3); The ammonia tank (13) is connected to the hot air pipe (5); a retaining wall (4) is installed in the furnace body, and the furnace is divided into three sections: a low-temperature section (81), a medium-temperature section (82) and a high-temperature section (83) by the retaining wall (4); a heat exchanger (3) is installed at the flue gas outlet of the low-temperature section (81), and an air pipe is connected to the air inlet of the heat exchanger (3). The air outlet of the heat exchanger (3) is connected to the hot air pipe (5) through a delivery pipe, and the hot air pipe (5) is connected to the medium-temperature section (82) and the high-temperature section (83) through a branch pipe. The medium-temperature section (82) is provided with a heat introduction port connected to the circulation fan (6), and the circulation fan (6) is connected to the furnace of the low-temperature section (81) through a conveying pipe, so as to introduce part of the flue gas of the medium-temperature section (82) into the low-temperature section (81); the roller conveyor belt (2) passes through the furnace body, and the tile blank (1) passes through the low-temperature section (81), the medium-temperature section (82) and the high-temperature section (83) in the furnace body on the roller conveyor belt (2) in sequence for heating and sintering treatment; The medium temperature section (82) is installed with a ceramic honeycomb body (7); a smoke drainage channel formed by a retaining wall (4) is provided on the upper part of the medium temperature section (82); a plurality of ventilation holes are provided on the lower retaining wall of the smoke drainage channel; a plurality of the ceramic honeycomb bodies (7) are installed below the ventilation holes on the lower retaining wall of the smoke drainage channel; the ceramic honeycomb body (7) is located above the ceramic tile body (1); the retaining wall (4) is composed of a vertical part connected to the inner wall of the furnace body and a horizontal part connected to the upper end of the vertical part; the two sides of the horizontal part are connected to the side walls of the furnace body, and the other end is connected to the retaining wall (4) between the low temperature section (81) and the medium temperature section (82); the horizontal part and the side wall of the furnace body form the smoke drainage channel for draining smoke and installing the ceramic honeycomb body (7); An online checkweigher (10) is provided on the roller conveyor belt (2) outside the furnace body outlet for accurately weighing the heated tile blanks (1) in real time; an electric damper is installed on each natural gas burner pipeline and its corresponding hot air branch pipe; a negative pressure sensor is provided in the high temperature section (83), and the negative pressure sensor and the circulating fan (6) are respectively connected to a control unit.

2. The intelligent energy-saving combustion system for a ceramic roller kiln according to claim 1, characterized in that: The online checkweigher comprises a control display terminal (14), a frame (12) and a workbench arranged on the frame (12); a checkweighing platform (31), a waiting-for-inspection platform (21) and a completed-inspection platform (22) are arranged on the workbench; the waiting-for-inspection platform (21) and the completed-inspection platform (22) are respectively located on both sides of the checkweighing platform (31); the waiting-for-inspection platform (21) is located on the feeding side of the checkweighing platform (31), and the completed-inspection platform (22) is located on the discharging side of the checkweighing platform (31).

3. The intelligent energy-saving combustion system for a ceramic roller kiln according to claim 2, characterized in that: The checkweighing platform (31) is composed of two weighing units connected in series; a weighing sensor is provided in the weighing unit and is connected to a data processing unit provided in a frame (12); the data processing unit is connected to a signal transmission module (11) installed on the frame; and the signal transmission module (11) is wirelessly connected to a control display terminal (14).

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