A method and system for oxygen-enriched combustion flame spectrum segmentation and bidirectional photovoltaic conversion

Abstract

The present invention discloses a method and system for spectrum segmentation and bidirectional photovoltaic conversion of an oxygen-enriched combustion flame, belonging to the field of energy conversion. The system includes an oxygen-enriched burner, an isolation device, a filter device, and a bidirectional photovoltaic device; the oxygen-enriched burner is used to generate a stable high-temperature flame; the isolation device is used to cool the radiation emitted by the high-temperature flame to reach the operating temperature of the filter device, and ensure that the radiation generated by the high-temperature flame can be effectively transmitted and is also used to isolate the combustion flue gas generated by the oxygen-enriched burner; the bidirectional photovoltaic device includes multiple bidirectional photovoltaic panels, and the filter device is used to spectrally segment the radiation transmitted from the isolation device, allowing the radiation corresponding to the spectral band that the bidirectional photovoltaic panel can use to pass through, and reflecting the radiation corresponding to the spectral band that the bidirectional photovoltaic panel cannot use back to the oxygen-enriched burner; the bidirectional photovoltaic panel is used to receive the radiation that passes through the filter device and convert it into electrical energy. The system is suitable for fields such as energy collection and combustion monitoring.

Description

Technical Field

[0001] The present invention belongs to the field of energy conversion, and in particular relates to a method and system for oxygen-enriched combustion flame spectrum segmentation and bidirectional photovoltaic conversion. Background Art

[0002] In recent years, oxygen-enriched combustion technology has gained widespread attention due to its advantages in improving combustion efficiency and reducing harmful gas emissions. By increasing the oxygen concentration in the combustion air, oxygen-enriched combustion significantly increases combustion temperature and efficiency, thereby more effectively utilizing the thermal energy of the fuel. However, while oxygen-enriched combustion technology has achieved certain improvements in energy utilization, further optimizing the combustion process and effectively utilizing the thermal radiation energy generated by high-temperature combustion remain topics requiring further research.

[0003] Photovoltaic technology, as a clean, renewable energy conversion method, has been widely used in the field of solar power generation. Traditional photovoltaic cells primarily convert sunlight into electricity, but their performance and efficiency are limited in high-temperature environments. Therefore, applying photovoltaic technology to other high-temperature thermal radiation sources, particularly the conversion of radiant energy from oxygen-enriched combustion flames, has become a promising research area. Summary of the Invention

[0004] In order to solve the problems in the prior art, the present invention provides a method and system for oxygen-enriched combustion flame spectrum segmentation and bidirectional photovoltaic conversion.

[0005] The technical solutions of the present invention are as follows:

[0006] In a first aspect, the present invention discloses an oxygen-enriched combustion flame spectrum splitting and bidirectional photovoltaic conversion device, comprising an oxygen-enriched burner, an isolation device, a filter device, a bidirectional photovoltaic device and a cooling system; the oxygen-enriched burner is used to generate a stable high-temperature flame as a high-temperature radiation heat source; the isolation device is used to preliminarily cool the radiation emitted by the high-temperature flame to reach the operating temperature of the filter device, and ensure that the radiation generated by the high-temperature flame can be effectively transmitted and is also used to isolate the combustion flue gas generated by the oxygen-enriched burner; the bidirectional photovoltaic device includes a plurality of bidirectional photovoltaic panels, the filter device is used to spectrally split the radiation transmitted from the isolation device, allowing the radiation corresponding to the spectral band that can be used by the bidirectional photovoltaic panel to pass through, and reflecting the radiation corresponding to the spectral band that cannot be used by the bidirectional photovoltaic panel back to the oxygen-enriched burner; the bidirectional photovoltaic panel is used to receive the radiation passing through the filter device and convert it into electrical energy; the cooling system is used to supply cooling liquid to the isolation device, the filter device and the bidirectional photovoltaic panel, thereby cooling and reducing the temperature to ensure that the three operate at the optimal temperature.

[0007] Furthermore, the filtering device is a hexagonal prism structure consisting of 6 multilayer dielectric film filters and 6 water-cooling tubes. The water-cooling tube is arranged between two adjacent multilayer dielectric film filters and brazed with the multilayer dielectric film filters through Pt or Au solder. The water-cooling tube is connected to the cooling system to form a closed-loop cooling circuit to achieve cooling of the filtering device; the multilayer dielectric film filter is a SiO2-TiO2-SiO2 three-layer dielectric film filter with ultra-white float glass as the substrate, and a temperature sensor is also provided on the multilayer dielectric film filter to collect the temperature of the multilayer dielectric film filter in real time; the water-cooling tube is made of quartz glass.

[0008] Furthermore, the number of bidirectional photovoltaic panels in the bidirectional photovoltaic device is 6, and the 6 bidirectional photovoltaic panels form a hexagonal prism structure, and a cooling pipe is arranged between two adjacent bidirectional photovoltaic panels. The cooling pipe is connected to the cooling system and forms a closed-loop cooling circuit to cool the bidirectional photovoltaic panels. The cooling pipe is made of quartz glass material; the bidirectional photovoltaic panels are also provided with temperature sensors to collect the temperature of the bidirectional photovoltaic panels in real time.

[0009] In a second aspect, the present invention also discloses an oxygen-enriched combustion flame spectrum segmentation and bidirectional photovoltaic conversion system, comprising a plurality of the oxygen-enriched combustion flame spectrum segmentation and bidirectional photovoltaic conversion devices, wherein the oxygen-enriched combustion flame spectrum segmentation and bidirectional photovoltaic conversion devices are arranged in an array, and two adjacent oxygen-enriched combustion flame spectrum segmentation and bidirectional photovoltaic conversion devices share a bidirectional photovoltaic panel.

[0010] In a third aspect, the present invention discloses a method for oxygen-enriched combustion flame spectrum segmentation and bidirectional photovoltaic conversion using the conversion system, comprising the following steps:

[0011] The oxygen-enriched burner is started, the oxygen concentration and the fuel ratio in the oxygen-enriched burner are adjusted, and then the fuel is ignited to generate a high-temperature flame. The radiation emitted by the high-temperature flame is initially cooled by the isolation device to reach the operating temperature of the filter device. The radiation generated by the high-temperature flame passes through the isolation device, and the combustion flue gas of the oxygen-enriched burner is isolated by the isolation device. Then, the filter device spectrally splits the radiation passing through the isolation device. The filter device transmits the radiation corresponding to the spectral band that can be used by the bidirectional photovoltaic panel, and reflects the radiation corresponding to the spectral band that cannot be used by the bidirectional photovoltaic panel back to the oxygen-enriched burner; the radiation passing through the filter device enters the bidirectional photovoltaic panel, and the bidirectional photovoltaic panel converts the received radiation energy into electrical energy; in addition, the bidirectional photovoltaic panel can transmit the unused radiation to the adjacent oxygen-enriched combustion flame spectrum splitting and bidirectional photovoltaic conversion device for electrical energy conversion, thereby realizing the two-way utilization of radiation energy;

[0012] At the same time, the cooling system cools the isolation device, filter device and bidirectional photovoltaic panels through circulating coolant to ensure that the three work at the preset optimal temperature.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The core innovation of this invention is mainly to achieve efficient spectral segmentation through a multi-layer dielectric film filter with a hexagonal prism structure, allowing selective transmission of high-temperature flame radiation bands; the bidirectional photovoltaic panel adopts a double-layer heterojunction back-to-back design, absorbing incident photons on both sides at the same time, and the unabsorbed photons (wavelength mismatch or insufficient energy) are transmitted into the adjacent photovoltaic conversion device, forming a cross-device light energy recycling, breaking the energy space limitation of the unidirectional photovoltaic system; the oxygen-rich combustion flame spectrum segmentation in the form of a symmetrical hexagonal prism structure and the bidirectional photovoltaic conversion device are spliced ​​into a honeycomb multi-level topology structure system (i.e., oxygen-rich combustion flame spectrum segmentation and bidirectional photovoltaic conversion system), realizing the all-round capture and utilization of combustion radiation energy.

[0015] The main advantages of the present invention are high efficiency in energy conversion, good thermal management performance and structural stability.

[0016] The present invention is applicable to fields such as energy collection and combustion monitoring, and has the advantages of high energy utilization efficiency and environmental friendliness. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of an oxygen-enriched combustion flame spectrum segmentation and bidirectional photovoltaic conversion device according to an embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the specific connection structure between the bidirectional photovoltaic panel and the cooling pipe of the present invention;

[0019] Figure 3 The specific materials and structure diagram of the bidirectional photovoltaic panel battery of the present invention;

[0020] Figure 4 A schematic diagram of the connection between two oxygen-enriched combustion flame spectrum segmentation and bidirectional photovoltaic conversion devices in the oxygen-enriched combustion flame spectrum segmentation and bidirectional photovoltaic conversion system;

[0021] Figure 5 Schematic diagram of the framework of the oxygen-enriched combustion flame spectrum segmentation and bidirectional photovoltaic conversion system.

[0022] In the figure: 1-oxygen-enriched burner, 2-isolating device, 3-light filtering device, 4-bidirectional photovoltaic panel, 5-connecting base plate, 6-cooling system. DETAILED DESCRIPTION

[0023] The present invention will be further described and illustrated below in conjunction with specific embodiments. The embodiments are merely illustrative of the present disclosure and do not limit its scope. The technical features of the various embodiments of the present invention may be combined accordingly, provided that there is no conflict between them.

[0024] To address these existing issues, the present invention aims to provide a method and system for oxy-combustion flame spectrum segmentation and bidirectional photovoltaic conversion. By combining oxy-combustion with spectrum segmentation and employing bidirectional photovoltaic conversion, a novel energy conversion method is proposed, achieving highly efficient flame energy conversion and improving the overall efficiency of the conversion system.

[0025] Example module test see Figure 1 In an embodiment of the present invention, an oxygen-enriched combustion flame spectrum segmentation and bidirectional photovoltaic conversion device is provided, comprising an oxygen-enriched burner 1, an isolation device 2, a filter device 3, a bidirectional photovoltaic panel 4, a connecting base plate 5, and a cooling system 6. The oxygen-enriched burner 1 is used to generate a stable high-temperature flame, serving as a high-temperature radiation heat source. The isolation device 2 is used to initially cool the radiation emitted by the high-temperature flame to the operating temperature of the filter device 3, while also isolating the combustion flue gas generated by the oxygen-enriched burner 1. The filter device 3 is used to spectrally segment the radiation generated by the cooled high-temperature flame, allowing radiation corresponding to spectral bands that can be used by the bidirectional photovoltaic panel 4 to pass through and reflecting radiation corresponding to spectral bands that cannot be used by the bidirectional photovoltaic panel 4 back to the oxygen-enriched burner 1. The bidirectional photovoltaic panel 4 is used to receive the radiation energy passing through the filter device 3 and convert it into electrical energy. The cooling system 6 is used to provide coolant to the isolation device 2, the filter device 3, and the bidirectional photovoltaic panel 4, thereby cooling them and ensuring that all three operate at optimal temperatures.

[0026] The shell of the oxygen-enriched burner 1 is made of a high-temperature resistant material. Specifically, the shell of the oxygen-enriched burner 1 can be made of a high-temperature resistant ceramic composite material (UNS S31008 stainless steel and silicon carbide composite lining, temperature resistance ≥1300°C), with the core feature of mixing the oxygen-enriched air flow and silicon carbide particles to enhance flame radiation; the shell of the oxygen-enriched burner 1 can also be made of UNS S31008 heat-resistant stainless steel material (thickness 8mm); to ensure that the oxygen-enriched burner 1 can operate stably for a long time under high temperature conditions, thereby extending the service life of the equipment.

[0027] The oxygen-enriched burner 1 uses a high-calorific-value gas fuel such as methane or propane as fuel, mixing oxygen with the recycled flue gas for oxygen-enriched combustion. This provides high energy density and ensures that the burner 1 produces a sufficiently high-temperature flame to meet the high-temperature radiation source requirements of the conversion device. By adjusting the oxygen concentration and the ratio of the recycled flue gas, the combustion process can be optimized, combustion efficiency can be improved, and harmful gas emissions can be reduced, achieving environmental protection and energy conservation. Silicon carbide (SiC) particles (particle size 20-50μm) are added to the fuel at a mass fraction of 0.5%-2% to enhance radiation. SiC particles have high broadband radiation properties and a high-temperature emissivity significantly higher than that of gas flames. This enhances the radiation intensity and stability of the flame during combustion, further improving the energy conversion efficiency of the photovoltaic cell. The SiC particle doping concentration can also be optimized using the discrete coordinate radiative transfer (DOM) algorithm to align the wavelength of the flame's main radiation peak with the photovoltaic cell's response spectrum.

[0028] The fuel nozzle of the oxygen-enriched burner 1 is equipped with a silicon carbide porous plate (porosity 80-90%, pore size 0.8-1.2 mm) with a three-level gradient pore structure. Combined with the thermal insulation interlayer (aluminum silicate insulation material) design, it improves flame uniformity and radiation intensity, reduces heat loss, and ensures long-term stable operation.

[0029] In a specific embodiment of the present invention, the fuel nozzle of the oxygen-enriched burner 1 is equipped with three layers of reaction-sintered silicon carbide (SiC) porous plates. The layering parameters are as follows: upper layer: pore diameter 1.2 mm, porosity 80%; middle layer: pore diameter 0.8 mm, porosity 90%; lower layer: pore diameter 1.0 mm, porosity 85%. In a preferred embodiment of the present invention, the fuel for the oxygen-enriched burner 1 is methane (CH4, purity ≥ 99.95%), with a flow rate of 0.12 kg / s and a calorific value of 50.1 MJ / kg. This is mixed with oxygen and the circulating flue gas is passed through a Venturi mixer to achieve turbulent mixing. The gas input flow rate is regulated by a mass flow controller. 1.5 wt% of SiC particles (particle size 35 μm) are added to the fuel. The main flame intensity peak is measured by transmission spectrum measurement using a fiber optic spectrometer.

[0030] The main body of the isolation device 2 consists of multiple high-temperature-resistant, high-purity quartz glass tubes arranged in a circular array, forming a cylindrical enclosure. These tubes offer excellent heat resistance and high light transmittance, along with excellent mechanical strength and corrosion resistance. They ensure effective transmission of flame radiation while isolating combustion flue gases, enabling stable operation in high-temperature environments and preventing contact with subsequent components. The bottom ends of the high-temperature-resistant, high-purity quartz glass tubes are connected to a connecting base plate 5, ensuring a tight arrangement of the tubes. This effectively isolates the flame from the flue gases, separates the flame light, and initially cools the tubes to the operating temperature of the filter. The tubes are connected to a cooling system, forming a closed-loop cooling circuit to cool the isolation device 2. Coolant from the cooling system 6 circulates within the tubes, effectively cooling the emitted flame light with minimal loss of flame photons. Temperature sensors are also installed on the tubes to measure the tube temperature in real time, enabling precise temperature control of the isolation device 2 via the cooling system 6.

[0031] In one embodiment of the present invention, the main body of the isolation device 2 consists of 19 highly translucent and heat-resistant GE214-grade synthetic quartz glass tubes (20 mm outer diameter, 2 mm wall thickness), tightly arranged in a cylindrical shape. Temperature sensors are mounted on the outer walls of the quartz tubes to monitor a temperature T of 300°C or less.

[0032] The filter device 3 comprises a hexagonal prism structure composed of six multilayer dielectric film filters and six water-cooling tubes. The six multilayer dielectric film filters serve as the six sides of the hexagonal prism, ensuring consistent spectral filtering in all directions. This allows radiation of specific wavelengths to pass through, achieving efficient spectral segmentation and ensuring a high degree of overlap between the transmitted energy and the photovoltaic cell response. The unusable radiation bands are then reflected back to the burner, providing a preliminary filter for the radiation bands that the photovoltaic cell cannot utilize. The six water-cooling tubes are positioned along the six edges of the hexagonal prism structure to stabilize the multilayer dielectric film filters at their optimal operating temperature. The edges of each multilayer dielectric film filter are brazed to the water-cooling tubes using Pt / Au solder. The water-cooling tubes are made of high-purity quartz glass and have internal coolant channels connected to the cooling system 6.

[0033] In one embodiment of the present invention, a 2mm-wide nickel-based alloy weld zone (annealed at 800°C) is provided on both edges of each multilayer dielectric filter. This zone is laser welded to the surface of the water-cooling tube, with a weld width of 0.3mm or less. Alternatively, the weld zone can be coated with a high-temperature silicate adhesive (HR-978, temperature resistant ≤1800°C) and pre-cured to achieve bonding, with a thickness of 0.3mm or less.

[0034] The multilayer dielectric film filter features a three-layer structure of SiO2 (80 nm), TiO2 (320 nm), and SiO2 (150 nm), deposited by magnetron sputtering on an ultra-clear float glass (SiO2) substrate. The filter efficiently splits the high-temperature spectrum, transmitting radiation corresponding to the wavelengths usable by the bidirectional photovoltaic panel 4 while initially filtering out the unusable wavelengths. These wavelengths are then reflected back to the burner, improving combustion efficiency and reducing photon loss. A temperature sensor is also installed on the multilayer dielectric film filter to collect its temperature in real time.

[0035] The number of bidirectional photovoltaic panels 4 in the bidirectional photovoltaic device is 6, and the 6 bidirectional photovoltaic panels 4 form a hexagonal prism structure. The 6 bidirectional photovoltaic panels 4 serve as the six sides of the hexagonal prism structure, and a cooling pipe is arranged between two adjacent bidirectional photovoltaic panels 4, that is, Figure 2 As shown, the left and right sides of the bidirectional photovoltaic panel 4 are equipped with cooling pipes, which are connected to the cooling system 6 to form a closed-loop cooling circuit to cool the bidirectional photovoltaic panel 4. A circulating coolant is introduced into the cooling pipes. By controlling the coolant speed, the operating temperature of the bidirectional photovoltaic panel 4 is maintained between 25 and 100°C. Stable heat dissipation ensures the long-term safe operation of the conversion device and prevents high temperatures from affecting the battery life and power generation efficiency. At the same time, a temperature sensor is also provided on the bidirectional photovoltaic panel 4 to collect the temperature of the bidirectional photovoltaic panel 4 in real time and accurately control it. The cooling pipe is made of high-purity quartz glass.

[0036] The bidirectional photovoltaic cell panel 4 is a semi-transparent structure, which makes it impossible to use the band gap ( ) photons are transmitted through the translucent solar panels to the combustion chamber on the opposite side for secondary use, thereby improving the overall energy utilization rate.

[0037] The bidirectional photovoltaic panels 4 in the bidirectional photovoltaic device are spliced ​​into a hexagonal prism structure, which facilitates the spectrum segmentation of multiple oxygen-rich combustion flames and the assembly between the bidirectional photovoltaic conversion devices, realizes all-round radiation energy capture, and more efficiently receives the radiation energy transmitted from the oxygen-rich burner 1 of this conversion device and the adjacent conversion device.

[0038] The bidirectional photovoltaic panel 4 receives the radiation energy from the flame radiation source and converts it into electrical energy with high efficiency. The bidirectional photovoltaic panel 4 adopts a symmetrical heterojunction-thermal substrate composite structure, such as Figure 3 As shown, the symmetrical heterojunction-thermal substrate composite structure specifically includes:

[0039] (a) Front heterojunction layer

[0040] The structure of the front heterojunction layer from outside to inside is:

[0041] i. Indium tin oxide (ITO) transparent conductive layer, thickness 200nm,

[0042] ii. An undoped InP window layer with a thickness of 145 nm, which is used to reduce surface reflection and guide photons into the bidirectional photovoltaic panel 4;

[0043] iii. n-type In x Ga 1-x The As absorption layer has a thickness of 2 μm and matches the main radiation peak spectrum of the oxygen-rich flame; wherein the value of x can be adjusted between 0.52 and 0.55, so that the absorption layer band gap can be adjusted within 0.70-0.75 eV to match the photon energy within the wavelength range of the main radiation peak of the oxygen-rich combustion flame. In a specific embodiment of the present invention, x = 0.53, that is, n-type In 0.53 Ga 0.47 As absorption layer, doping concentration 1×10 17 cm -3 , band gap E g =0.73eV, which matches the main radiation peak spectrum of the oxygen-rich flame;

[0044] iv. p-type heavily doped InP back field layer, thickness 100nm, doping concentration 5×10 18 cm -3 ;

[0045] (b) Semi-transparent structure, i.e. thermal substrate

[0046] The silicon substrate (400μm thick) was prepared using a float zone purification process to reduce infrared free-carrier absorption. Double-sided chemical mechanical polishing was performed to minimize optical scattering losses. ITO transparent conductive layers were applied to both sides, and copper interconnects were welded to the edges. An embedded K-type thermocouple array was installed to monitor the operating temperature of the bidirectional photovoltaic panels.

[0047] (c) Back heterojunction layer

[0048] The rear heterojunction layer and the front layer have symmetrical structures; the ITO transparent conductive layers of the front and rear heterojunction layers lead out electrodes through edge metallization wiring.

[0049] Double-sided polished silicon (Si) (400 μm) is used as the substrate and indium tin oxide (ITO) is used as the conductive layer to achieve semi-transparency, allowing unused radiation energy to transmit to nearby conversion devices, realizing bidirectional utilization of the spectrum to improve power conversion efficiency.

[0050] The technical features of the bidirectional photovoltaic panel 4 are:

[0051] (1) Double-sided spectral response: The front and back heterojunction layers are completely symmetrical about the substrate layer, and from the outside to the inside are the undoped InP window layer (thickness 145nm), n-type Inx Ga 1-x As absorption layer (thickness 2.0μm), p-type heavily doped InP back field layer (thickness 100nm);

[0052] (2) Translucent efficiency enhancement: The silicon substrate (400 μm) is double-sided polished, and the conductive layer is transparent indium tin oxide (ITO), allowing unused light to be transmitted to the adjacent conversion device for secondary capture;

[0053] (3) Temperature control: The left and right sides of the bidirectional photovoltaic panel 4 are equipped with cooling pipes, which cool the panel by circulating coolant.

[0054] The cooling system 6 includes a cooling liquid chamber, a liquid inlet, a liquid outlet, a centrifugal pump and a temperature control device. The cooling liquid chamber is arranged on the upper and lower sides of the connecting base plate 5. The centrifugal pump is pumped into the cooling liquid chamber through the liquid inlet, and the cooling liquid heated by the radiation energy and the flue gas is discharged through the liquid outlet to form a continuous circulation cooling loop, which cools the isolation device 2, the filter device 3 and the bidirectional photovoltaic panel 4 to maintain the optimal operating temperature of the three, that is, to ensure that the photovoltaic cells and other key components operate at the optimal temperature, thereby improving the reliability and life of the conversion device.

[0055] The coolant chamber is made of a highly thermally conductive material, ensuring efficient heat transfer, quickly dissipating heat generated by the isolation device 2, the filter device 3, and the bidirectional photovoltaic panel 4. In one embodiment of the present invention, a temperature control device monitors the coolant temperature in real time and, based on operating conditions, adjusts the centrifugal pump valve opening and thus the liquid feed rate using a PID control algorithm. This ensures stable operation of the converter in high-temperature environments, prevents overheating of key components, and prolongs its service life.

[0056] The coolant in cooling system 6 is a mixture of deionized water and propylene glycol (3:7 by volume). This mixture is circulated via a centrifugal pump (adjustable flow rate of 0-10 L / min) into the quartz glass tube of isolation device 2, the water-cooling tube of filter device 3, and the cooling tube of bidirectional photovoltaic panel 4. In another specific embodiment of the present invention, a temperature sensor collects the real-time temperatures of the quartz glass tube of isolation device 2, bidirectional photovoltaic panel 4, and multilayer dielectric film filter. A PID algorithm is used to dynamically adjust the centrifugal pump valve opening, thereby regulating the flow rate. Dual-redundant temperature control technology is employed to ensure reliable and stable operation of the conversion device.

[0057] Specifically, the coolant can also be selected as 60% ethylene glycol + 40% deionized water (boiling point 110°C). The flow rate is dynamically adjusted by the PID control algorithm to adjust the opening of the water pump valve, thereby regulating the coolant flow rate.

[0058] The connecting base plate 5 is made of high-strength, high-temperature-resistant materials, such as metal or ceramic-based composite materials. This allows it to maintain structural integrity in high-temperature environments and resist deformation or damage, further enhancing the stability and durability of the entire conversion device. The connecting base plate 5 is provided with holes for securing the quartz glass tube of the isolation device 2, the water-cooling tube of the filter device 3, and the cooling tube of the bidirectional photovoltaic panel 4. The surface of the holes is frosted to achieve locking with the quartz glass tube, water-cooling tube, and cooling tube. The connecting base plate 5 also has a stepped groove structure for securing the multilayer dielectric film filter of the filter device 3 and the bidirectional photovoltaic panel 4. This groove structure allows for self-locking fixation of the multilayer dielectric film filter and the bidirectional photovoltaic panel 4.

[0059] The quartz glass tubes of the isolation device 2 are fixedly connected to the connecting base plate 5, forming a stable cylindrical structure, ensuring the mechanical stability and durability of the isolation device 2 in high-temperature environments. The holes in the connecting base plate 5, which are used to secure the quartz glass tubes of the isolation device 2, form an annular array of circular holes, ensuring that the quartz glass tubes of the isolation device 2 are tightly arranged in this circular array. The inner walls of the holes are frosted to create a capillary adhesion effect with the surface of the quartz glass tubes.

[0060] The cooling system 6 controls the temperature of the isolation device 2, the filter device 3 and the bidirectional photovoltaic panel 4 synchronously by connecting the quartz glass tube, the water cooling tube and the cooling tube integrated in the bottom plate 5, so as to maintain the operating temperature of the conversion device within the range of 20-100°C.

[0061] In a specific embodiment of the present invention, the connecting base plate 5 is made of ceramic-based composite material, and an annular hole array is opened with a hole diameter of φ20.0±0.05 mm and a hole spacing of 21.0±0.02 mm. The hole wall is frosted to enhance the capillary sealing effect; through the stepped grooves and flange locking device, the self-locking splicing of the multi-layer dielectric film filter and the bidirectional photovoltaic panel 4 is achieved.

[0062] In the oxygen-enriched combustion flame spectrum segmentation and bidirectional photovoltaic conversion device of the present invention, the geometric parameters of each component (silicon carbide doping concentration in the fuel, filter transmission band) are optimized and adjusted based on the coupling of the flame radiation spectrum and the photovoltaic cell band gap characteristics.

[0063] In a preferred embodiment of the present invention, Figure 4 and Figure 5As shown, the present invention provides an oxygen-enriched combustion flame spectrum segmentation and bidirectional photovoltaic conversion system, namely, a multi-level topology system comprising multiple oxygen-enriched combustion flame spectrum segmentation and bidirectional photovoltaic conversion devices. These devices are arranged in a regularly repeated pattern to form a honeycomb-like multi-level topology system, eliminating the need for additional brackets. This design utilizes the geometric symmetry of hexagonal prisms to impart high deformation resistance to the system. Any two adjacent oxygen-enriched combustion flame spectrum segmentation and bidirectional photovoltaic conversion devices share a single bidirectional photovoltaic panel 4. Based on actual needs (power load, smoke exhaust volume, etc.), identical oxygen-enriched combustion flame spectrum segmentation and bidirectional photovoltaic conversion devices can be expanded or disassembled at the open joints of any unit in the periphery of the multi-level topology system.

[0064] In an embodiment of the present invention, the present invention further provides a method for spectrum segmentation and bidirectional photovoltaic conversion of an oxygen-enriched combustion flame using a conversion system, comprising the following steps:

[0065] The reforming system was operated, and oxy-burner 1 was started. The oxygen concentration and fuel ratio in oxy-burner 1 were adjusted, and the fuel was ignited to produce a high-temperature flame. Methane and SiC particles were injected into oxy-burner 1 as a doped fuel. The oxygen concentration (21%, 30%, 35%, 40%) and methane flow rate (0.10, 0.12, and 0.15 kg / s) were adjustable to optimize combustion conditions. A silicon carbide porous plate inside the fuel nozzle of oxy-burner 1 stabilized the flame and ensured even heat distribution.

[0066] The high-temperature flame radiation passes through the high-purity quartz glass tube of isolation device 2 for a preliminary cooling process to reach the operating temperature of filter device 3. The radiation generated by the high-temperature flame is transmitted through isolation device 2, while the combustion flue gas generated by oxygen-enriched burner 1 is blocked by isolation device 2. Filter device 3 utilizes a multi-layer dielectric filter to perform flame spectrum segmentation on the radiation transmitted through isolation device 2, allowing radiation energy of specific wavelengths to pass through, specifically allowing radiation corresponding to the radiation band that can be utilized by bidirectional photovoltaic panels 4. It then initially filters out radiation in the radiation band that cannot be utilized by photovoltaic panels 4 and reflects the unusable radiation band back to oxygen-enriched burner 1. The radiation passing through filter device 3 enters bidirectional photovoltaic panels 4, which receive the radiant energy and efficiently convert it into electrical energy. The translucent design of bidirectional photovoltaic panels 4 allows unused radiation energy to transmit to the adjacent oxygen-enriched combustion flame spectrum segmentation and bidirectional photovoltaic conversion devices, achieving bidirectional utilization of radiation energy. A cooling system 6 cools isolation device 2, filter device 3, and bidirectional photovoltaic panels 4 by circulating coolant, ensuring they operate at optimal temperatures. The temperature control device of the cooling system 6 monitors the temperature of the isolation device 2, the filter device 3 and the bidirectional photovoltaic panel 4 in real time, adjusts the flow of the coolant, prevents overheating, and improves the reliability and life of the conversion system.

[0067] The multi-level topology structure of the present invention is compatible with various gas fuels such as natural gas and synthesis gas. By adjusting the doping concentration, particle size and filter passband parameters of the nanoparticle SiC, it can be adapted to various high-temperature scenarios such as power station boilers and industrial kilns.

[0068] This invention achieves efficient flame energy conversion by segmenting the spectrum generated by an oxy-combustion flame and combining it with bidirectional photovoltaic conversion technology. The bidirectional photovoltaic panels 4 in each oxy-combustion flame spectrum segmentation and bidirectional photovoltaic conversion device are assembled into a hexagonal prism structure, with the oxy-combustion burner 1 and isolation device 2 located in the innermost layer, and the bidirectional photovoltaic device forming the outer shell. The overall multi-level topology system consists of multiple identical oxy-combustion flame spectrum segmentation and bidirectional photovoltaic conversion devices combined in a honeycomb multi-level topology to optimize space utilization and thermal energy management.

[0069] Through the above-mentioned specific implementation methods, the oxygen-enriched combustion flame spectrum segmentation and bidirectional photovoltaic conversion system of the present invention realizes the efficient conversion of flame energy, improves the overall efficiency of the conversion system, is suitable for fields such as energy collection and combustion monitoring, and has the advantages of high energy utilization efficiency and environmental friendliness.

[0070] The above-described embodiments merely illustrate several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. Persons skilled in the art will readily appreciate that variations and modifications may be made without departing from the scope of the present invention, all of which fall within the scope of protection of the present invention.

Claims

1. An oxygen-enriched combustion flame spectrum segmentation and bidirectional photovoltaic conversion system, characterized in that: The invention comprises a plurality of oxygen-enriched combustion flame spectrum segmentation and bidirectional photovoltaic conversion devices, wherein the oxygen-enriched combustion flame spectrum segmentation and bidirectional photovoltaic conversion devices comprise an oxygen-enriched burner (1), an isolation device (2), a filter device (3), a bidirectional photovoltaic device, and a cooling system (6); the oxygen-enriched combustion flame spectrum segmentation and bidirectional photovoltaic conversion devices are arranged in an array, and two adjacent oxygen-enriched combustion flame spectrum segmentation and bidirectional photovoltaic conversion devices share a bidirectional photovoltaic panel (4); The oxygen-enriched burner (1) is used to generate a stable high-temperature flame as a high-temperature radiation heat source; The isolation device (2) is used to initially cool the radiation emitted by the high-temperature flame to reach the operating temperature of the filter device (3), and to ensure that the radiation generated by the high-temperature flame can be effectively transmitted and is also used to isolate the combustion flue gas generated by the oxygen-enriched burner (1); The bidirectional photovoltaic device comprises a plurality of bidirectional photovoltaic panels (4), and the filter device (3) is used to perform spectral segmentation on the radiation transmitted through the isolation device (2), so as to allow radiation corresponding to a spectral band that can be used by the bidirectional photovoltaic panels (4) to pass through, and to reflect radiation corresponding to a spectral band that cannot be used by the bidirectional photovoltaic panels (4) back to the oxygen-enriched burner (1); The bidirectional photovoltaic panel (4) is used to receive radiation passing through the filter device (3) and convert it into electrical energy; The cooling system (6) is used to supply cooling liquid to the isolation device (2), the filter device (3) and the bidirectional photovoltaic panel (4), thereby cooling and lowering the temperature, ensuring that the three operate at a preset optimal temperature.

2. The oxygen-enriched combustion flame spectrum segmentation and bidirectional photovoltaic conversion system according to claim 1, characterized in that: The oxygen-enriched burner (1) uses methane or propane as fuel and oxygen mixed with combustion flue gas as an oxidizing atmosphere for oxygen-enriched combustion, and adds silicon carbide particles with a mass fraction of 0.5%-2% to the fuel to enhance radiation, and the particle size of the silicon carbide particles is 20-50 μm; The shell of the oxygen-enriched burner (1) is made of a high-temperature resistant material, which is ceramic, refractory brick or high-temperature alloy; and a silicon carbide porous medium plate is provided in the fuel nozzle of the oxygen-enriched burner (1) to stabilize the flame and ensure that the oxygen-enriched burner can operate stably for a long time, and the porosity of the silicon carbide porous medium plate is 80-90%, and the pore size is 0.8-1.2 mm.

3. The oxygen-enriched combustion flame spectrum segmentation and bidirectional photovoltaic conversion system according to claim 1, characterized in that: The isolation device (2) is a cylindrical structure formed by arranging a plurality of quartz glass tubes in a circular array. The quartz glass tubes are connected to the cooling system (6) to form a closed-loop cooling circuit to achieve cooling of the isolation device (2). A temperature sensor is also provided on the quartz glass tube to collect the temperature of the quartz glass tube in real time.

4. The oxygen-enriched combustion flame spectrum segmentation and bidirectional photovoltaic conversion system according to claim 3, characterized in that: The optical filter device (3) is a hexagonal prism structure composed of 6 multilayer dielectric film filters and 6 water-cooling tubes. The water-cooling tube is arranged between two adjacent multilayer dielectric film filters and is brazed with the multilayer dielectric film filters through Pt or Au solder. The water-cooling tube is connected to the cooling system (6) to form a closed-loop cooling circuit to achieve cooling of the optical filter device (3). The multilayer dielectric film filter is a SiO2-TiO2-SiO2 three-layer dielectric film filter with ultra-white float glass as the substrate, and a temperature sensor is also provided on the multilayer dielectric film filter to collect the temperature of the multilayer dielectric film filter in real time. The water-cooling tube is made of quartz glass.

5. The oxygen-enriched combustion flame spectrum segmentation and bidirectional photovoltaic conversion system according to claim 4, characterized in that: The number of bidirectional photovoltaic panels (4) in the bidirectional photovoltaic device is 6, and the 6 bidirectional photovoltaic panels (4) form a hexagonal prism structure. A cooling pipe is arranged between two adjacent bidirectional photovoltaic panels (4), and the cooling pipe is connected to the cooling system (6) to form a closed-loop cooling circuit to cool the bidirectional photovoltaic panels (4). The cooling pipe is made of quartz glass material; a temperature sensor is also provided on the bidirectional photovoltaic panel (4) to collect the temperature of the bidirectional photovoltaic panel (4) in real time.

6. The oxygen-enriched combustion flame spectrum segmentation and bidirectional photovoltaic conversion system according to claim 1, characterized in that: The bidirectional photovoltaic cell panel (4) adopts a symmetrical heterojunction-thermal substrate composite structure. The symmetrical heterojunction is two heterojunction structures symmetrical along the thermal substrate. The heterojunction structures are indium tin oxide transparent conductive layer, undoped InP window layer, n-type In x Ga 1-x As absorption layer and p-type heavily doped InP back field layer; the thickness of the indium tin oxide transparent conductive layer is 200nm, the thickness of the undoped InP window layer is 145nm, and the thickness of the n-type In x Ga 1-x The thickness of the As absorption layer is 2.0 μm, and the value range of x is 0.52-0.55; the thickness of the p-type heavily doped InP back field layer is 100 nm; the thermal substrate is double-sided polished silicon, and the thickness of the double-sided polished silicon is 400 μm.

7. The oxygen-enriched combustion flame spectrum segmentation and bidirectional photovoltaic conversion system according to claim 5, characterized in that: The coolant of the cooling system (6) is a deionized water-propylene glycol mixture, which is stored in a coolant chamber of the cooling system (6) and circulated through a centrifugal pump of the cooling system (6) into the quartz glass tube, the water cooling tube and the cooling tube forming a closed-loop cooling circuit with the cooling system (6); The cooling system (6) dynamically adjusts the valve opening of the centrifugal pump through the PID method based on the temperature collected by each temperature sensor, thereby adjusting the coolant flow rate respectively to ensure that the isolation device (2), the filter device (3) and the bidirectional photovoltaic panel (4) operate at a preset optimal temperature; wherein the volume ratio of deionized water to propylene glycol is 3:7, and the coolant flow rate is 0-10L / min.

8. The oxygen-enriched combustion flame spectrum segmentation and bidirectional photovoltaic conversion system according to claim 5, characterized in that: The photovoltaic conversion device further comprises a connecting base plate (5), the connecting base plate (5) being provided with holes for fixing the quartz glass tube, the water cooling tube and the cooling tube, and the connecting base plate (5) being provided with a groove structure for fixing the multilayer dielectric film filter of the filter device (3) and the bidirectional photovoltaic cell panel (4).

9. A method for oxygen-enriched combustion flame spectrum segmentation and bidirectional photovoltaic conversion using the conversion system of claim 1, characterized in that: The following steps are involved: The oxygen-enriched burner (1) is started, the concentration of oxygen and the ratio of fuel in the oxygen-enriched burner (1) are adjusted, and the fuel is ignited to generate a high-temperature flame. The radiation emitted by the high-temperature flame is initially cooled by the isolation device (2) to reach the working temperature of the filter device (3). The radiation generated by the high-temperature flame passes through the isolation device (2), and the combustion flue gas of the oxygen-enriched burner (1) is isolated by the isolation device (2). Then, the filter device (3) performs spectral segmentation on the radiation passing through the isolation device (2). The filter device (3) transmits the radiation corresponding to the spectral band that can be used by the bidirectional photovoltaic panel (4) and reflects the radiation corresponding to the spectral band that cannot be used by the bidirectional photovoltaic panel (4) back to the oxygen-enriched burner (1); the radiation passing through the filter device (3) enters the bidirectional photovoltaic panel (4), and the bidirectional photovoltaic panel (4) converts the received radiation energy into electrical energy; and the bidirectional photovoltaic panel (4) can transmit the unused radiation to the adjacent oxygen-enriched combustion flame spectrum segmentation and bidirectional photovoltaic conversion device for electrical energy conversion, thereby realizing the bidirectional utilization of radiation energy; At the same time, the cooling system (6) cools the isolation device (2), the filter device (3) and the bidirectional photovoltaic panel (4) through circulating coolant, ensuring that the three operate at a preset optimal temperature.

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