Intelligent heating system based on carbon circulation

Abstract

The utility model belongs to the technical field of industrial heating furnaces, and relates to an intelligent heating system based on carbon circulation, which comprises a coal gas system, a carbon circulation system, an oxygen system, a flue gas system, a heating furnace body and a heating section heat supply system, the coal gas system comprises a coal gas cold conveying pipeline and a coal gas hot conveying pipeline; the carbon circulating system comprises a first flue gas adjusting stop valve, a circulating flue gas cold conveying pipeline and a circulating flue gas hot conveying pipeline; the oxygen system comprises an oxygen conveying pipeline; the flue gas system comprises a flue gas waste heat recovery flue, a second flue gas adjusting stop valve and a chimney; at least one heating section heat supply system is arranged in the heating furnace body, and a smoke outlet of the heating furnace body is connected with an inlet of the smoke waste heat recovery flue; an outlet of the flue gas waste heat recovery flue is further connected with a first flue gas adjusting stop valve, an outlet of the oxygen conveying pipeline is connected to the circulating flue gas cold conveying pipeline so as to be mixed with circulating flue gas, and the circulating flue gas hot conveying pipeline and the coal gas hot conveying pipeline are both connected to a heat supply system.

Description

Technical Field

[0001] This utility model belongs to the field of industrial heating furnace technology and relates to an intelligent heating system based on carbon cycle. Background Technology

[0002] Against the backdrop of a global effort to address climate change and promote green and low-carbon development, "energy conservation and emission reduction" has become an important development goal for the industrial sector in various countries. my country also attaches great importance to this issue and has introduced a series of policies and regulations to guide the transformation of its industrial sector towards green, low-carbon, and sustainable development.

[0003] As early as 2007, China issued the "Comprehensive Work Plan for Energy Conservation and Emission Reduction," which explicitly proposed the "energy conservation and emission reduction" initiative, pointing the way for energy conservation and emission reduction work in my country's industrial sector. The plan aimed to promote energy consumption reduction and pollutant emission reduction across various industries, achieving a virtuous cycle between economic development and environmental protection. With the introduction of the "dual carbon" target, my country has continuously deepened its measures in carbon emission management. In 2025, a notice was issued regarding the "Work Plan for Covering the Steel, Cement, and Aluminum Smelting Industries in the National Carbon Emission Trading Market." According to this notice, the steel, cement, and aluminum smelting industries were officially included in the national carbon emission trading market. The greenhouse gases included in this management cover carbon dioxide (CO2), carbon tetrafluoride (CF4), and carbon hexafluoride (C2F6). This measure marks a significant step forward in my country's carbon emission control, further strengthening carbon emission constraints on key industries and encouraging enterprises to proactively take measures to reduce carbon emissions.

[0004] As a vital foundational industry in my country, the steel industry plays a crucial role in national economic development. However, it is also a major consumer of energy and emitter of pollutants, making energy conservation and emission reduction in its production processes a challenging task. Among the many production stages in the steel industry, heating furnaces are key energy-consuming equipment, bearing the important mission of "energy conservation, emission reduction, and carbon reduction." The energy consumption level of heating furnaces directly affects the production costs and energy efficiency of steel enterprises, while their emissions of pollutants and greenhouse gases also put significant pressure on the environment. Currently, there are certain differences in the heating process routes for heating furnaces. Some process routes, due to outdated technology and unreasonable design, result in low energy utilization rates, leading not only to energy waste but also increased production costs for enterprises. Moreover, some traditional processes generate significant pollutant and greenhouse gas emissions during operation, which is incompatible with current requirements for energy conservation, emission reduction, and low-carbon development.

[0005] Therefore, developing reasonable, advanced, and mature heating systems is of great significance for the steel industry to achieve its goals of "energy conservation, emission reduction, and carbon reduction." By optimizing heating systems, improving energy efficiency, and reducing pollutant and greenhouse gas emissions, companies can not only lower production costs and enhance market competitiveness, but also make a positive contribution to achieving my country's "dual carbon" goals and promoting green industrial development. Utility Model Content

[0006] In view of this, the purpose of this utility model is to provide an intelligent heating system based on carbon cycle in order to reduce carbon emissions from heating furnaces.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] An intelligent heating system based on carbon cycle includes a gas system, a carbon cycle system, an oxygen system, a flue gas system, a heating furnace body, and a heating section heating system.

[0009] The gas system includes a cold gas conveying pipeline and a hot gas conveying pipeline connected sequentially along the gas flow direction.

[0010] The carbon recycling system includes a first flue gas regulating and shut-off valve, a circulating flue gas cold conveying pipeline, and a circulating flue gas hot conveying pipeline connected sequentially along the flue gas flow direction.

[0011] The oxygen system includes oxygen delivery pipelines;

[0012] The flue gas system includes a flue gas waste heat recovery flue, a second flue gas regulating and shut-off valve, and a chimney, which are connected sequentially along the flue gas flow direction.

[0013] The furnace body is provided with at least one heating section heating system, and the exhaust port of the furnace body is connected to the inlet of the flue gas waste heat recovery flue.

[0014] The outlet of the flue gas waste heat recovery flue is also connected to a first flue gas regulating and shut-off valve to divide the emitted flue gas into two paths for emission and circulation respectively. The outlet of the oxygen delivery pipeline is connected to the circulating flue gas cold delivery pipeline to mix with the circulating flue gas to form simulated air or simulated oxygen-enriched air. Both the circulating flue gas heat delivery pipeline and the gas heat delivery pipeline are connected to the heating section heating system.

[0015] Furthermore, the oxygen system also includes an oxygen electric butterfly valve, an oxygen regulating and shut-off valve, and an oxygen flow detection device arranged sequentially along the oxygen flow direction on the oxygen delivery pipeline.

[0016] Furthermore, the gas system includes a gas electric butterfly valve, a gas electric blind valve, a gas regulating and shut-off valve, and a gas flow detection device, which are arranged sequentially along the gas flow direction on the gas cold transport pipeline.

[0017] Furthermore, the gas regulating and shut-off valve is interlocked with the first flue gas regulating and shut-off valve and the oxygen regulating and shut-off valve. When the opening degree of the gas regulating and shut-off valve increases, the opening degree of the first flue gas regulating and shut-off valve and the oxygen regulating and shut-off valve increases synchronously.

[0018] Furthermore, the first flue gas regulating and shut-off valve and the oxygen regulating and shut-off valve automatically adjust their opening and closing degrees according to the values ​​of the gas flow detection device, and confirm the adjustment by comparing the values ​​of the circulating flue gas flow detection device and the oxygen flow detection device.

[0019] Furthermore, the first flue gas regulating and shut-off valve and the second flue gas regulating and shut-off valve are interlocked. When the opening degree of the first flue gas regulating and shut-off valve increases, the opening degree of the second flue gas regulating and shut-off valve decreases synchronously.

[0020] Furthermore, the flue gas waste heat recovery flue in the flue gas system is connected to the first flue gas regulating and shut-off valve and the second flue gas regulating and shut-off valve through a flue gas conveying pipeline, and an exhaust fan is provided on the flue gas conveying pipeline to ensure smooth discharge of flue gas.

[0021] Furthermore, a gas preheater is provided between the cold gas transmission pipeline and the hot gas transmission pipeline to preheat the gas.

[0022] Furthermore, a flue gas preheater is provided in the circulating flue gas cold conveying pipe and the circulating flue gas hot conveying pipe to preheat the simulated air or simulated oxygen-enriched air.

[0023] Furthermore, the gas preheater and the flue gas preheater are arranged in the flue gas waste heat recovery flue to recover the waste heat of the emitted flue gas.

[0024] The beneficial effects of this utility model are as follows:

[0025] 1. This utility model provides an intelligent heating system based on carbon cycle, which significantly reduces carbon emissions and improves energy efficiency through an innovative flue gas recirculation and oxygen coupling mechanism. The system diverts the flue gas discharged from the furnace, with a portion of the flue gas mixed with oxygen through the carbon cycle system to form simulated air (oxygen ratio 21%) or oxygen-enriched air (oxygen ratio > 21%), which is then transported to the furnace body for combustion along with the coal gas. Flue gas recirculation not only meets the conditions for complete combustion of coal gas but also reduces carbon dioxide emissions by approximately 20%-25%, effectively mitigating the greenhouse effect. The system's intelligent valve interlock control (linking of coal gas, oxygen, and flue gas regulating valves) ensures precise and stable combustion, fully demonstrating the intelligent and environmentally innovative nature of the technical solution.

[0026] 2. The system's oxygen-enriched combustion mode further highlights its practicality and efficiency. By adjusting the oxygen ratio, the system can generate oxygen-enriched air to support medium- and low-calorific-value coal gas (such as mixed coal gas, with a calorific value of approximately 1400 kcal / Nm³). 3 The highly efficient combustion of the gas increases output by approximately 15% and reduces energy consumption. This feature is particularly suitable for steel companies, helping them achieve energy balance and production optimization. Simultaneously, the preheaters in the gas and carbon cycle systems utilize the waste heat of high-temperature flue gas (approximately 700°C) to heat the cold gas and circulating flue gas to 500°C and 250°C respectively, improving energy efficiency by approximately 15%-20%. This energy-saving design not only reduces fuel consumption but also saves operating costs for enterprises.

[0027] 3. Furthermore, the exhaust fan configured in the flue gas system ensures smooth flue gas discharge, reducing chimney height and civil engineering investment. This design balances engineering economy and environmental protection requirements, making it particularly suitable for application in high-energy-consuming industries such as steel and cement. This utility model, through comprehensive innovation in flue gas recirculation, oxygen-enriched combustion, waste heat recovery, and intelligent control, achieves synergistic optimization of energy saving, emission reduction, consumption reduction, and economic benefits, providing a practical solution for the green upgrading of industrial heating furnaces.

[0028] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, wherein:

[0030] Figure 1 This is a schematic diagram of the structure of an intelligent heating system based on carbon cycle in an embodiment.

[0031] Attached reference numerals: Gas system: 1-1-Electric gas butterfly valve, 1-2-Electric gas blind valve, 1-3-Gas regulating and shut-off valve, 1-4-Gas flow detection device, 1-5-Cold gas conveying pipeline, 1-6-Gas preheater, 1-7-Hot gas conveying pipeline;

[0032] Carbon cycle system: 2-1-First flue gas regulating and shut-off valve, 2-2-Circulating flue gas flow detection device, 2-3-Circulating flue gas cold conveying pipeline, 2-4-Flue gas preheater, 2-5-Circulating flue gas hot conveying pipeline, 2-6-Simulated air flow detection device;

[0033] Oxygen system: 3-1-Oxygen electric butterfly valve, 3-2-Oxygen regulating and shut-off valve, 3-3-Oxygen flow detection device, 3-4-Oxygen delivery pipeline;

[0034] Flue gas system: 4-1-exhaust fan, 4-2-flue gas conveying pipeline, 4-3-second flue gas regulating and shut-off valve, 4-4-chimney;

[0035] 5-Heating furnace body; 6-Heating section heating system; 7-Flue gas waste heat recovery flue. Detailed Implementation

[0036] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this utility model. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0037] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the present invention. To better illustrate the embodiments of the present invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0038] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this utility model. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0039] Example 1: Intelligent Combustion Heating System Based on Carbon Cycle

[0040] like Figure 1As shown, this embodiment provides an intelligent heating system based on carbon cycle for conventional combustion scenarios in steel industry heating furnaces. The system includes a gas system 1, a carbon cycle system 2, an oxygen system 3, a flue gas system 4, a heating furnace body 5, and a heating section heating system 6.

[0041] System composition and connection relationship

[0042] Gas system 1: Along the gas flow direction, it includes, in sequence, a gas electric butterfly valve 1-1, a gas electric blind valve 1-2, a gas regulating and shut-off valve 1-3, a gas flow detection device 1-4, a cold gas conveying pipeline 1-5, a gas preheater 1-6, and a hot gas conveying pipeline 1-7. Cold gas enters the gas preheater 1-6 through the cold gas conveying pipeline 1-5, is heated to approximately 500°C, and then conveyed to the heating section heating system 6 through the hot gas conveying pipeline 1-7.

[0043] Carbon circulation system 2: Along the flue gas flow direction, it sequentially includes a first flue gas regulating and shut-off valve 2-1, a circulating flue gas flow detection device 2-2, a circulating flue gas cold conveying pipeline 2-3, a flue gas preheater 2-4, a circulating flue gas hot conveying pipeline 2-5, and a simulated air flow detection device 2-6. Circulating flue gas enters the circulating flue gas cold conveying pipeline 2-3 through the first flue gas regulating and shut-off valve 2-1, is heated to approximately 250°C by the flue gas preheater 2-4, and is then conveyed to the heating section heating system 6 through the circulating flue gas hot conveying pipeline 2-5.

[0044] Oxygen system 3 includes an oxygen electric butterfly valve 3-1, an oxygen regulating and shut-off valve 3-2, an oxygen flow detection device 3-3, and an oxygen delivery pipeline 3-4. Oxygen is connected to the circulating flue gas cold delivery pipeline 2-3 through the oxygen delivery pipeline 3-4, and they are mixed to form simulated air (oxygen ratio 21%).

[0045] Flue gas system 4 includes a flue gas waste heat recovery flue 7, a flue gas exhaust fan 4-1, a flue gas conveying pipe 4-2, a second flue gas regulating and shut-off valve 4-3, and a chimney 4-4. The exhaust port of the heating furnace body 5 is connected to the flue gas waste heat recovery flue 7. After waste heat recovery, the flue gas is divided into two paths: one path enters the carbon circulation system 2 through the first flue gas regulating and shut-off valve 2-1, and the other path is discharged through the second flue gas regulating and shut-off valve 4-3 and the chimney 4-4.

[0046] Heating furnace body 5 and heating section heating system 6: The heating furnace body 5 includes a furnace steel structure, refractory masonry materials, walking mechanism and other auxiliary systems, and is equipped with at least one heating section heating system 6. The heating section heating system 6 receives input from the gas heat transfer pipeline 1-7 and the circulating flue gas heat transfer pipeline 2-5 for conventional combustion.

[0047] Work process:

[0048] Gas transmission: Cold gas (approximately 20°C) enters the gas preheater 1-6 through cold gas transmission pipeline 1-5, where it is heated to 250°C using the waste heat recovery system in flue gas duct 7. The gas is then transmitted to the section heating system 6 through hot gas transmission pipeline 1-7. Gas flow detection devices 1-4 monitor the flow rate in real time, with a typical value of 20000 Nm³. 3 / h.

[0049] Flue gas recirculation and oxygen mixing: The flue gas (approximately 700℃) discharged from the heating furnace body 5 enters the flue gas waste heat recovery flue duct 7, and part of the flue gas enters the circulating flue gas cold conveying pipeline 2-3 through the first flue gas regulating and shut-off valve 2-1. Oxygen is injected through the oxygen conveying pipeline 3-4, and the oxygen flow detection device 3-3 controls the oxygen flow rate to 6300 Nm³. 3 The mixture is heated at a rate of 1 / h to achieve an oxygen content of 21%, forming simulated air. The simulated air is heated to 250°C by the flue gas preheater 2-4 and then transported to the heating section heating system 6 through the circulating flue gas heat transfer pipeline 2-5.

[0050] Valve interlock control: Gas regulating and shut-off valve 1-3 is interlocked with oxygen regulating and shut-off valve 3-2 and the first flue gas regulating and shut-off valve 2-1. When the gas flow rate increases, the opening of the oxygen and flue gas circulation valves increases synchronously. The first flue gas regulating and shut-off valve 2-1 is interlocked with the second flue gas regulating and shut-off valve 4-3. When the circulating flue gas volume increases, the emitted flue gas volume decreases. The valve opening is automatically adjusted by the PLC control system based on data from the flow detection device.

[0051] Flue gas emission: Residual flue gas is discharged through flue gas conveying pipe 4-2, driven by exhaust fan 4-1, and discharged through chimney 4-4 via second flue gas regulating and shut-off valve 4-3. The exhaust fan power is ~200kW to ensure smooth flue gas emission.

[0052] This embodiment uses flue gas recirculation to form simulated air, reducing carbon dioxide emissions by approximately 20%; the gas preheater and flue gas preheater recover waste heat from the flue gas, improving energy efficiency by approximately 15%; and the exhaust fan reduces the chimney height by at least 30 meters, reducing engineering investment.

[0053] Example 2: Intelligent heating system for oxygen-enriched combustion based on carbon cycle

[0054] This embodiment adjusts the system configuration based on Embodiment 1 to achieve oxygen-enriched combustion, and is suitable for high-yield, low-calorific-value gas scenarios. The system composition is the same as in Embodiment 1, but the oxygen ratio and the number of heating sections are adjusted.

[0055] System composition and connection relationship

[0056] Gas System 1: Same as Example 1, but with gas flow rate reduced to 15000 Nm³. 3 / h, the gas is a medium-low calorific value mixed gas (calorific value approximately 1400 kcal / Nm³). 3 ).

[0057] Carbon cycle system 2: Circulating flue gas flow rate changed to 22500 Nm 3 / h, the simulated air oxygen ratio is adjusted to 25%.

[0058] Oxygen System 3: Oxygen flow rate increased to 5625 Nm 3 / h, to create simulated oxygen-rich air.

[0059] Flue gas system 4: The exhaust fan power is maintained at ~200kW, and the flue gas waste heat recovery flue 7 recovers more waste heat to support higher flow rates.

[0060] Heating furnace body 5 and four-stage heating system 6: The heating furnace body 5 is equipped with a four-stage heating system 6 to meet the needs of higher production.

[0061] Work process:

[0062] Gas transmission: Low-calorific-value mixed gas enters the gas preheater 1-6 through the gas cold transmission pipeline 1-5, is heated to 250℃, and then transmitted to the two-stage heating system 6 through the gas hot transmission pipeline 1-7. The gas flow detection device 1-4 monitors the flow rate at 15000 Nm³. 3 / h.

[0063] Oxygen-enriched air formation: High-temperature flue gas (approximately 700℃) is collected by flue gas waste heat recovery duct 7. A portion of the flue gas enters the circulating flue gas cold delivery pipeline 2-3 through the first flue gas regulating and shut-off valve 2-1. Oxygen is injected into the oxygen system 3, and the oxygen flow detection device 3-3 controls the flow rate to 5625 Nm³. 3 / h, forming simulated oxygen-enriched air with an oxygen content of 25%. The oxygen-enriched air is heated to 500℃ by the flue gas preheater 2-4 and then transported to the heating section heating system 6 through the circulating flue gas heat transfer pipeline 2-5.

[0064] Valve interlock control: Same as in Example 1, but the first flue gas regulating and shut-off valve 2-1 and the oxygen regulating and shut-off valve 3-2 are dynamically adjusted to a higher opening degree based on the data from the gas flow detection device 1-4 to support oxygen-enriched combustion. The simulated air flow detection device 2-6 provides feedback to confirm the mixed gas ratio.

[0065] Flue gas emission: The remaining flue gas is discharged through the flue gas conveying pipe 4-2, driven by the exhaust fan 4-1, and discharged through the second flue gas regulating and shut-off valve 4-3 and the chimney 4-4.

[0066] This embodiment increases production by approximately 15% through oxygen-enriched combustion, supports efficient combustion of low-calorific-value coal gas, and meets the energy balance needs of steel enterprises; flue gas recirculation reduces carbon emissions by approximately 25%; waste heat recovery improves energy efficiency by approximately 20%; and the four-stage heating system enhances system flexibility.

[0067] The above embodiments are merely preferred embodiments of this utility model, and the scope of protection is not limited thereto. Any equivalent changes made based on the technical solution of this utility model by replacing or adjusting components (such as changing the type of preheater, increasing the number of heating sections, adjusting the valve control logic, etc.) should be covered within the scope of protection of this utility model.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of this technical solution, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An intelligent heating system based on carbon cycle, characterized in that, This includes the gas system, carbon cycle system, oxygen system, flue gas system, heating furnace body, and heating section heating system; The gas system includes a cold gas conveying pipeline and a hot gas conveying pipeline connected sequentially along the gas flow direction. The carbon recycling system includes a first flue gas regulating and shut-off valve, a circulating flue gas cold conveying pipeline, and a circulating flue gas hot conveying pipeline connected sequentially along the flue gas flow direction. The oxygen system includes oxygen delivery pipelines; The flue gas system includes a flue gas waste heat recovery flue, a second flue gas regulating and shut-off valve, and a chimney, which are connected sequentially along the flue gas flow direction. The furnace body is provided with at least one heating section heating system, and the exhaust port of the furnace body is connected to the inlet of the flue gas waste heat recovery flue. The outlet of the flue gas waste heat recovery flue is also connected to a first flue gas regulating and shut-off valve to divide the emitted flue gas into two paths for emission and circulation respectively. The outlet of the oxygen delivery pipeline is connected to the circulating flue gas cold delivery pipeline to mix with the circulating flue gas to form simulated air or simulated oxygen-enriched air. Both the circulating flue gas heat delivery pipeline and the gas heat delivery pipeline are connected to the heating section heating system.

2. The intelligent heating system according to claim 1, characterized in that, The oxygen system also includes an oxygen electric butterfly valve, an oxygen regulating and shut-off valve, and an oxygen flow detection device, which are arranged sequentially along the oxygen flow direction on the oxygen delivery pipeline.

3. The intelligent heating system according to claim 2, characterized in that, The gas system includes a gas electric butterfly valve, a gas electric blind valve, a gas regulating and shut-off valve, and a gas flow detection device, which are arranged sequentially along the gas flow direction on the gas cold transport pipeline.

4. The intelligent heating system according to claim 3, characterized in that, The gas regulating and shut-off valve is interlocked with the first flue gas regulating and shut-off valve and the oxygen regulating and shut-off valve. When the opening of the gas regulating and shut-off valve increases, the opening of the first flue gas regulating and shut-off valve and the oxygen regulating and shut-off valve increase synchronously.

5. The intelligent heating system according to claim 4, characterized in that, The first flue gas regulating and shut-off valve and the oxygen regulating and shut-off valve automatically adjust their opening and closing degrees according to the values ​​of the gas flow detection device, and confirm the adjustment by comparing the values ​​of the circulating flue gas flow detection device and the oxygen flow detection device.

6. The intelligent heating system according to claim 1, characterized in that, The first flue gas regulating and shut-off valve and the second flue gas regulating and shut-off valve are interlocked. When the opening degree of the first flue gas regulating and shut-off valve increases, the opening degree of the second flue gas regulating and shut-off valve decreases synchronously.

7. The intelligent heating system according to claim 1, characterized in that, The flue gas waste heat recovery flue in the flue gas system is connected to the first flue gas regulating and shut-off valve and the second flue gas regulating and shut-off valve through a flue gas conveying pipeline, and an exhaust fan is provided on the flue gas conveying pipeline to ensure smooth discharge of flue gas.

8. The intelligent heating system according to claim 1, characterized in that, A gas preheater is installed between the gas cold transmission pipeline and the gas hot transmission pipeline to preheat the gas.

9. The intelligent heating system according to claim 8, characterized in that, Flue gas preheaters are installed in the circulating flue gas cold transport pipeline and the circulating flue gas hot transport pipeline to preheat the simulated air or simulated oxygen-enriched air.

10. The intelligent heating system according to claim 9, characterized in that, The gas preheater and flue gas preheater are arranged in the flue gas waste heat recovery flue to recover the waste heat of the emitted flue gas.

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