Oxygen-enriched combustion test system

Abstract

The embodiment of the invention provides an oxygen-enriched combustion test system. The oxygen-enriched combustion test system comprises a combustion device, a gas pipeline, a combustion-supporting gas conveying device, a flue device, a regulation and control device, a measuring device and a central control device. The combustion device comprises a refractory material layer, a heat insulation material layer, a supporting inner shell and a supporting outer shell, a vertical flame path is formed in the supporting inner shell, and the supporting outer shell and the supporting inner shell are arranged at intervals to form a hollow interlayer. The gas pipeline conveys gas to the vertical flame path. The combustion-supporting gas conveying device comprises a combustion-supporting gas main pipe and a plurality of first combustion-supporting gas branches, the combustion-supporting gas main pipe is connected with inlets of the first combustion-supporting gas branches, outlets of the first combustion-supporting gas branches are connected to different height positions of the vertical flame path in an on-off mode, and the adjustable and controllable number of high-direction sections is achieved; and simulating multiple working conditions of combustion temperature field distribution. And meanwhile, data support is provided for combustion process analysis in cooperation with synchronous measurement of the regulation and control device and the measuring device, and flexible adjustment of the combustion working condition and comprehensive monitoring of key parameters are achieved.

Description

Technical Field

[0001] This invention relates to the field of coking technology, and in particular to an oxygen-enriched combustion test system. Background Technology

[0002] In China's coking industry, while the capacity structure has been continuously optimized and industry concentration has significantly increased, and energy conservation and emission reduction have yielded remarkable results, many challenges remain. With increasingly stringent national regulations on energy conservation, emission reduction, and low-carbon production, the coking industry, as a key area of ​​energy consumption and carbon emissions, urgently needs to explore efficient and low-carbon production models. Declining market demand for coke has led to wider losses in the industry, forcing companies to seek new technological paths to reduce costs and improve competitiveness. Meanwhile, the collaboration between coking and steel hydrogen metallurgy shows promising development prospects. The blast furnace-converter long process, as the main technology, consumes a huge amount of energy and emits massive amounts of carbon. Hydrogen metallurgy uses hydrogen instead of carbon as a reducing agent, with water as the reduction product, which can significantly reduce carbon dioxide emissions and is an important path for the steel industry to achieve a green and low-carbon transformation.

[0003] The oxygen-enriched coking coupled with coal chemical processes has emerged. This process utilizes the heat from the combustion of coal gas and oxygen to provide the heat required for coking. The high-temperature flue gas after combustion, due to the reduction of N2, is rich in H2O and CO2, providing favorable conditions for subsequent coal gasification or activation, as well as the separation of effective gases CO and H2. The resulting H2 and CO syngas can be widely used in other fields.

[0004] However, the key technology for oxygen-enriched coking lies in the methods and theoretical basis for temperature and oxygen control during oxygen-enriched combustion. Currently, there is a lack of experimental devices that can conveniently and accurately simulate various operating conditions and provide comprehensive measurement parameters; therefore, an oxygen-enriched combustion experimental device is urgently needed. Summary of the Invention

[0005] The purpose of this invention is to provide an oxygen-enriched combustion test system for studying multi-stage oxygen-enriched combustion control technology. The specific technical solution is as follows:

[0006] An oxygen-enriched combustion test system, comprising:

[0007] The combustion device includes a refractory material layer, a heat insulation material layer, a supporting inner shell, and a supporting outer shell. The heat insulation material layer and the refractory material layer are stacked sequentially on the inner wall of the supporting inner shell. The interior of the supporting inner shell forms a vertical fire channel. The supporting outer shell and the supporting inner shell are spaced apart, and a hollow sandwich is formed between them.

[0008] A gas pipeline, the gas outlet of which leads into the vertical fire channel;

[0009] A combustion-supporting gas conveying device includes a main combustion-supporting gas pipe and multiple first combustion-supporting gas branches. The main combustion-supporting gas pipe and the inlets of the multiple first combustion-supporting gas branches are connected, and the outlets of the multiple first combustion-supporting gas branches can be connected to different height positions of the vertical fire channel.

[0010] A flue system includes a flue and a flue gas duct, wherein the two ends of the flue are respectively connected to the vertical fire channel and the flue gas duct;

[0011] The control device includes a pressure regulator and a flow regulator. The pressure regulator is disposed in at least one of the gas pipeline, the main combustion gas pipe, and a plurality of first combustion gas branches. The flow regulator is disposed in at least one of the gas pipeline, the main combustion gas pipe, and a plurality of first combustion gas branches.

[0012] The measuring device includes a temperature measuring device, a flow measuring device, a pressure measuring device, an oxygen concentration measuring device, and a flue gas composition measuring device. The temperature measuring device is disposed at least in one of the refractory material layer, the vertical flue, the gas pipeline, the main combustion gas pipe, the plurality of first combustion gas branches, the flue, and the flue gas pipeline. The flow measuring device is disposed at least in one of the gas pipeline, the main combustion gas pipe, and the plurality of first combustion gas branches. The pressure measuring device is disposed at least in one of the gas pipeline, the main combustion gas pipe, the plurality of first combustion gas branches, and the flue. The oxygen concentration measuring device is disposed at least in one of the main combustion gas pipe and the plurality of first combustion gas branches. The flue gas composition measuring device is disposed at least in one of the flue or the flue gas pipeline.

[0013] The central control device selects and connects the first combustion gas branch, the gas pipeline, and the flue gas pipeline corresponding to at least one height position of the vertical fire channel, according to preset or user-input instructions.

[0014] In some embodiments, the combustion device further includes a cooling fan, the supporting housing is provided with a first vent and a second vent communicating with the outside, the first vent and the second vent are respectively connected to the hollow interlayer, and the cooling fan is disposed at the first vent.

[0015] In some embodiments, the combustion device further includes an air volume controller and is electrically connected to the cooling fan.

[0016] In some embodiments, the flue is provided with an air intake point.

[0017] In some embodiments, along the height direction of the fire channel, the outlets of a plurality of first combustion-supporting gas branches are connected to the fire channel at equal intervals.

[0018] In some embodiments, the number of the first combustion-supporting gas branches is greater than or equal to three.

[0019] In some embodiments, along the height direction of the vertical flue, the temperature measuring device includes a plurality of flue gas thermometers, which are disposed at different height positions of the vertical flue to measure the temperature at multiple height positions of the vertical flue.

[0020] In some embodiments, it also includes:

[0021] An oxygen generator, the outlet of which is connected to the main combustion-supporting gas pipe.

[0022] In some embodiments, the oxygen generating device further includes an oxygen concentration regulator for adjusting the oxygen concentration of the combustion-supporting gas output by the oxygen generating device.

[0023] In some embodiments, the device further includes an operating mechanism comprising an operating platform, a support leg, and a ladder. The operating platform surrounds the support housing, the support leg supports the operating platform on the ground, and one end of the ladder is connected to the operating platform and the other end is connected to the ground.

[0024] In some embodiments, the central control device selects and connects the first combustion-supporting gas branches corresponding to at least two height positions of the vertical fire channel according to preset or user-input instruction information;

[0025] The central control device also allocates the flow distribution ratio of at least two first combustion-supporting gas branches according to the instruction information.

[0026] Beneficial effects of the embodiments of the present invention:

[0027] The oxygen-enriched combustion test system provided in this invention connects the outlets of multiple first combustion-supporting gas branches to different height positions of the vertical combustion chamber, allowing for on / off connection. The number of vertical segments in the first combustion-supporting gas branches is adjustable and controllable, enabling precise control of combustion conditions within the vertical combustion chamber and simulation of multiple combustion temperature field distribution conditions. Simultaneously, with the assistance of a control device, pressure and flow rate can be dually regulated to ensure stable operation, and synchronous measurements provide data support for combustion process analysis, achieving flexible adjustment of combustion conditions and comprehensive monitoring of key parameters. Compared with existing technologies, this system possesses combustion distribution adjustment capabilities, allowing for flexible adjustment of operating conditions. Its comprehensive measurement parameters and stable structure facilitate the achievement of experimental objectives for theoretical model verification. The oxygen-enriched combustion test system of this application contributes to promoting the development and application of oxygen-enriched coking coupled with coal gasification processes, meeting national requirements for energy conservation, carbon reduction, and green development in the industry.

[0028] Of course, implementing any product or method of the present invention does not necessarily require achieving all of the advantages described above at the same time. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other embodiments can be obtained based on these drawings.

[0030] Figure 1 A schematic diagram of the structure of an oxygen-enriched combustion test system provided in this application embodiment;

[0031] Figure 2 for Figure 1 A cross-sectional structural schematic diagram of an oxygen-enriched combustion test system is shown.

[0032] Figure 3 This is a cross-sectional structural schematic diagram of another oxygen-enriched combustion test system provided in an embodiment of this application.

[0033] The attached figures are labeled as follows:

[0034] Combustion device 1, refractory material layer 11, heat insulation material layer 12, supporting inner shell 13, supporting outer shell 14, vertical fire channel 15, hollow sandwich layer 16

[0035] Gas pipeline 2,

[0036] Combustion-supporting gas delivery device 3, combustion-supporting gas main pipe 31, first combustion-supporting gas branch 32, second combustion-supporting gas branch 33

[0037] Flue gas device 4, flue gas 41, flue gas resource utilization reaction space 411, carbonaceous material inlet 412, flue gas duct 42.

[0038] Measuring device 5, flue gas thermometer 51,

[0039] Operating device 6, operating platform 61, support leg 62, ladder 63. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art based on this application are within the scope of protection of the present invention.

[0041] To provide an oxygen-enriched combustion test system for studying multi-stage oxygen-enriched combustion control technology. Figure 1 This is a schematic diagram of the structure of an oxygen-enriched combustion test system provided in an embodiment of this application. Figure 2 for Figure 1 The diagram shown is a cross-sectional view of an oxygen-enriched combustion test system. Figure 1 and Figure 2 As shown, an embodiment of this application proposes an oxygen-enriched combustion test system, including a combustion device 1, a gas pipeline 2, a combustion-supporting gas delivery device 3, a flue device 4, a control device, a measuring device 5, and a central control device. The combustion device 1 includes a refractory material layer 11, a heat-insulating material layer 12, a supporting inner shell 13, and a supporting outer shell 14. The heat-insulating material layer 12 and the refractory material layer 11 are sequentially stacked on the inner wall of the supporting inner shell 13, forming a vertical fire channel 15 inside the supporting inner shell 13. The supporting outer shell 14 and the supporting inner shell 13 are spaced apart to form a hollow interlayer 16. The gas pipeline 2 delivers gas to the vertical fire channel 15. The combustion-supporting gas delivery device 3 includes a combustion-supporting gas main pipe 31 and multiple first combustion-supporting gas branches 32. The combustion-supporting gas main pipe 31 is connected to the inlets of the multiple first combustion-supporting gas branches 32, and the outlets of the multiple first combustion-supporting gas branches 32 can be switched on and off at different heights in the vertical fire channel 15. The flue system 4 includes a flue 41 and a flue gas duct 42, with the flue 41 connected to the vertical fire channel 15 and the flue gas duct 42 at both ends. The control device includes a pressure regulator and a flow regulator, both of which are installed in the gas duct 2, the main combustion gas pipe 31, and multiple first combustion gas branches 32. The measuring device 5 includes a temperature measuring device, a flow measuring device, a pressure measuring device, an oxygen concentration measuring device, and a flue gas composition measuring device. The temperature measuring device is installed in the refractory material layer 11, the vertical flue 15, the gas pipeline 2, the main combustion gas pipe 31, multiple first combustion gas branches 32, the flue 41, and the flue gas pipe 42. The flow measuring device is installed in the gas pipeline 2, the main combustion gas pipe 31, and multiple first combustion gas branches 32. The pressure measuring device is installed in the gas pipeline 2, the main combustion gas pipe 31, multiple first combustion gas branches 32, and the flue 41. The oxygen concentration measuring device is installed in the main combustion gas pipe 31 and multiple first combustion gas branches 32. The flue gas composition measuring device is installed in at least one of the flue 41 or the flue gas pipe 42. The central control device selects and connects the first combustion gas branch 32, the gas pipeline 2, and the flue gas pipe 42 corresponding to at least one height position of the vertical flue 15 according to preset or user-input instructions.

[0042] The refractory material layer 11 is mostly made of silica bricks or clay bricks, but other refractory materials may also be used. The insulation material layer 12 is made of perlite bricks or other insulation materials. The inner metal support shell 13 is made of high-temperature resistant stainless steel, which supports and seals the inner refractory material layer 11 and the insulation material layer 12. The outer metal support shell 14 is made of stainless steel or carbon steel, etc.

[0043] The refractory material layer 11 provides a combustion space for the fire channel 15, providing a combustion site for the mixing of coal gas and combustion-supporting gas.

[0044] The inner supporting shell 13 and the outer supporting shell 14 are connected by angle steel or shaped steel, etc. The outer supporting shell 14 applies supporting force to the inner supporting shell 13, the refractory material layer 11, and the heat insulation material layer 12 through the angle steel or shaped steel structure.

[0045] The metal support shell 14 can be wrapped or insulated according to the heat dissipation test results.

[0046] The on / off control of the first combustion gas branch 32 can be achieved through a solenoid valve.

[0047] Pressure regulators, such as pressure regulating valves, are used to ensure that gas enters the vertical flue 15 at a suitable pressure. For example, when the gas pressure is too high, the pressure is reduced by the pressure regulating valve to meet the test requirements.

[0048] Flow regulators, such as flow control valves, are used to regulate the flow rate of coal gas and combustion-supporting gases, precisely controlling the amount of fuel and combustion-supporting gases entering the vertical combustion chamber 15, and enabling tests under different flow ratio conditions. Flow meters can be differential pressure type, turbine type, etc.

[0049] Temperature, flow, pressure, oxygen concentration, and flue gas composition measuring instruments monitor various parameters of the combustion process in real time, providing data support for experimental analysis. Thermometers can be thermocouples, resistance thermometers, etc.

[0050] Flow measurement instruments, such as flow meters, are used to measure the flow rate of coal gas and combustion-supporting gases, providing accurate data for adjusting operating parameters.

[0051] Pressure measuring instruments, such as pressure sensors, are used to measure the pressure of coal gas, combustion-supporting gases, and flue gas pressure within flue 41, ensuring stable pressure during gas transport and combustion. Pressure sensors can be flexible pressure gauges, pressure transmitters, etc.

[0052] Oxygen concentration measuring instruments, such as oxygen concentration detectors, are used to monitor the oxygen concentration of combustion-supporting gases in real time to ensure accurate experimental conditions. Oxygen concentration detectors can be instruments based on principles such as electrochemistry and paramagnetism.

[0053] Flue gas component measuring instruments, such as flue gas analyzers, are used to analyze the content of various components in flue gas and study the characteristics of combustion products. Flue gas analyzers can be instruments based on principles such as infrared absorption and electrochemistry.

[0054] The control device of this oxygen-enriched combustion test system can precisely adjust pressure and flow. For example, the pressure regulator can respond quickly within a certain range, stabilizing the pressure of coal gas or combustion-supporting gas at the set value with high adjustment accuracy; the flow regulator can precisely control the gas flow rate with a wide adjustment range, meeting the test requirements of different flow ratios.

[0055] In some embodiments, when selecting to connect at least two height positions of the first combustion-supporting gas branch 32 corresponding to the fire channel 15, the central control device further allocates the flow distribution ratio of the connected at least two first combustion-supporting gas branch 32 according to the instruction information.

[0056] The number of high-altitude sections is adjustable and controllable, and can be flexibly adjusted according to experimental needs. The reasonable section setting ensures the uniformity and controllability of combustion in different height sections, further improving the control performance of the device and enabling the experiment to more accurately simulate the oxygen-enriched combustion conditions of the actual coke oven vertical flue 15.

[0057] Test operation mode of the oxygen-enriched combustion test system:

[0058] Before the test begins, the oxygen generator prepares the required oxygen concentration of combustion-supporting gas, which is then transported through the combustion-supporting gas main pipe 31. The flow rate and pressure are regulated by the flow regulating valves and pressure regulating valves on multiple first combustion-supporting gas branches 32, and distributed to different sections of the vertical combustion channel 15. At the same time, the number of combustion-supporting gas sections, the distribution ratio, and other parameters, as well as the gas delivery volume and pressure, are adjusted by the control device. After setting the parameters for each operating condition, the combustion process is started.

[0059] During combustion, temperature measuring devices continuously measure parameters such as flue gas temperature and brick temperature of insulation layer 12. Flow measuring devices, pressure measuring devices, and oxygen concentration measuring devices measure data such as the flow rate, pressure, and oxygen concentration of combustion-supporting gases and coal gas. Flue gas composition measuring devices analyze the composition of flue gas components. All data is transmitted to relevant instruments for recording and analysis. The flue gas produced during combustion is discharged through flue 41 and can be further treated as needed.

[0060] By changing the oxygen production parameters, gas parameters, and combustion-supporting gas distribution parameters through the control device, oxygen-enriched combustion tests can be conducted under different working conditions such as oxygen concentration, number of segments, distribution ratio, and gas composition, so as to carry out research on oxygen-enriched combustion characteristics under multiple working conditions.

[0061] In applications, this oxygen-enriched combustion test system can conduct tests on the effect of different numbers of vertical segments on oxygen-enriched combustion.

[0062] For example, there are 5 first combustion gas branches 32. In the experiment, three test conditions were set up, with the number of vertical sections of the oxy-fuel combustion test system's vertical flue 15 set to 3 (3 first combustion gas branches 32 open), 4 (4 first combustion gas branches 32 open), and 5 (5 first combustion gas branches 32 open), respectively. In all three test conditions, each first combustion gas branch 32 was supplied with combustion gas of the same oxygen concentration, and the gas pipeline 2 supplied the same gas composition and flow rate. The parameters of the gas pipeline 2, the parameters of the combustion gas main pipe 31, and the allocation ratio of the multiple open first combustion gas branches 32 were the same. The oxy-fuel combustion test system was started, and combustion tests were conducted under the three different number of sections. Temperature, flow, pressure, oxygen concentration, and flue gas composition data were measured and recorded using temperature, flow, pressure, oxygen concentration, and flue gas composition measuring instruments to analyze the impact of the number of vertical sections on oxy-fuel combustion.

[0063] For example, the effect of different combustion-supporting gas flow distribution ratios on oxygen-enriched combustion can be studied. The flow distribution ratio of the combustion-supporting gas in each segment is adjusted by a flow regulator, ensuring that each first combustion-supporting gas branch 32 receives the same oxygen concentration of combustion-supporting gas, and the gas pipeline 2 supplies the same gas composition and delivery volume. The parameters of the gas pipeline 2 and the combustion-supporting gas main pipe 31 remain unchanged. Combustion tests are conducted, and relevant parameters such as temperature, pressure, and flue gas composition are measured. The oxygen-enriched combustion under different flow distribution ratios is then compared.

[0064] This technical solution allows the outlets of multiple first combustion-supporting gas branches 32 to be connected to different height positions of the vertical combustion channel 15, with adjustable and controllable vertical segmentation of the first combustion-supporting gas branches 32. This enables precise control of the combustion conditions within the vertical combustion channel 15, simulating multiple combustion temperature field distribution conditions. Simultaneously, with the control device, pressure and flow rate can be dually regulated to ensure stable operation, and the measuring device 5 provides data support for combustion process analysis through synchronous measurement, achieving flexible adjustment of combustion conditions and comprehensive monitoring of key parameters. Compared with existing technologies, this system possesses combustion distribution adjustment capabilities, allowing for flexible adjustment of operating conditions. Its comprehensive measurement parameters and stable structure facilitate the completion of experimental objectives for theoretical model verification. The oxygen-enriched combustion test system of this application helps promote the development and application of oxygen-enriched coking coupled with coal gasification processes, meeting national requirements for energy conservation, carbon reduction, and green development in the industry.

[0065] During assembly, the combustion device 1 can be installed on the base platform. First, install the base platform in the designated position, ensuring it is level and stable. Install support structures such as pillars on the base platform, using the pillars to support the steel structure of the combustion device 1 (combustion device 1), constructing the main frame of the combustion device 1. Appropriately set the vertical segments according to the device height, ensuring the number of segments is no less than three. Next, install the operating platform 61, connecting it to the ground via a ladder 63.

[0066] The embodiments of this application also propose that the combustion device 1 further includes a cooling fan, and the supporting shell 14 is provided with a first ventilation port and a second ventilation port communicating with the outside. The first ventilation port and the second ventilation port are respectively connected to the hollow interlayer 16, and the cooling fan is disposed at the first ventilation port.

[0067] The cooling fan can be an axial flow fan or a centrifugal fan, and its power range is selected according to the volume of the hollow sandwich 16 and the required air exchange rate.

[0068] The first and second ventilation openings can be located at either end of the axial direction or at radially symmetrical positions on the supporting housing 14.

[0069] When the cooling fan is turned on, it blows air into the first vent, thereby drawing cold air from outside into the hollow sandwich layer 16. Alternatively, when the cooling fan is turned on, it blows air outward, thereby blowing hot air from inside the hollow sandwich layer 16 out through the first vent, creating a negative pressure inside the hollow sandwich layer 16. Under the action of this negative pressure, cold air from outside is drawn into the hollow sandwich layer 16 through the second vent.

[0070] This technical solution uses a forced convection cooling fan installed in the hollow sandwich layer 16. The cooling fan drives the airflow to form a directional flow within the hollow sandwich layer 16, quickly carrying away the heat transferred from the refractory material layer 11 to the supporting inner shell 13. This simulates the heat absorption effect of the coal coking process in the carbonization chamber during actual coking conditions, thereby improving the accuracy of the oxygen-enriched combustion test system in simulating the real working environment of a coking oven.

[0071] The combustion device 1 may also include an air volume controller, which is electrically connected to the cooling fan. The air volume controller is used to adjust the air volume delivered by the cooling fan, which can be achieved through a frequency converter or a damper actuator. The air volume controller can precisely adjust the cooling intensity of the hollow sandwich 16 to simulate different heat absorption conditions in the carbonization chamber (in reality, the amount of heat absorbed in the carbonization chamber varies under different conditions).

[0072] For example, different heat absorption conditions in the carbonization chamber are divided into different coking stages. The simulated coking stages for coal coking include the drying and preheating stage, the pyrolysis stage, and the shrinkage and coking stage. To this end, the airflow controller presets airflow parameter curves corresponding to each stage, thereby simulating the different heat absorption of the carbonization chamber at different stages. Specifically, the airflow is adjusted according to the coking heat consumption of different simulated coking stages; a higher coking heat demand results in a larger airflow, and a lower coking heat demand results in a smaller airflow.

[0073] Furthermore, embodiments of this application propose that, along the height direction of the flue 15, the outlets of a plurality of first combustion-supporting gas branches 32 are connected to the flue 15 at equal intervals. Specifically, the outlets of the first combustion-supporting gas branches 32 are uniformly distributed along the height direction of the flue 15, with equal vertical distances between adjacent branch outlets. As one implementation, for example, a branch outlet is provided at intervals of 0.5 meters or 1 meter. Thus, the combustion-supporting gas can form a gradient distribution along the height direction of the flue 15.

[0074] The number of first combustion-supporting gas branches 32 is greater than or equal to three. Specifically, the first combustion-supporting gas branches 32 deliver combustion-supporting gas to different height positions of the vertical flue 15 through multiple outlets arranged at equal intervals along the height direction of the vertical flue 15. The number of branches can be set to 3, 4, 5, 6 or more. Each first combustion-supporting gas branch 32 is controlled by an independent valve. Therefore, by increasing the number of first combustion-supporting gas branches 32, the uniformity of combustion-supporting gas distribution within the vertical flue 15 can be improved, facilitating experiments on combustion reactions with different longitudinal uniformities.

[0075] The embodiments of this application also propose that, along the height direction of the vertical flue 15, the temperature measuring device includes a plurality of flue gas thermometers 51, which are disposed at different height positions of the vertical flue 15 to measure the temperature at multiple height positions of the vertical flue 15.

[0076] This technical solution achieves three-dimensional monitoring of the temperature field during combustion by arranging temperature measuring devices at different heights within the vertical combustion chamber 15. Specifically, multi-point temperature measurements accurately reflect the development state of the combustion reaction at different heights, including key parameters such as flame propagation speed and combustion intensity distribution. Compared to single-point temperature measurement, this arrangement provides more comprehensive temperature data, offering direct evidence for analyzing oxygen-enriched combustion characteristics and optimizing the distribution of combustion-supporting gases. Furthermore, by comparing temperature change trends at different heights, combustion stability can be assessed, and localized overheating or incomplete combustion can be detected promptly. Therefore, this measurement structure provides effective data support for studying the relationship between temperature gradient distribution and combustion efficiency within the vertical combustion chamber 15.

[0077] The flue gas component measuring instrument is used to measure the concentration of at least one gas selected from H2, CO, H2O, CO2, O2, N2, NO, and NO2 in flue gas, but is not limited thereto.

[0078] Therefore, this technical solution achieves precise monitoring of key components in flue gas by configuring multiple types of gas analysis equipment. Specifically, by measuring the concentration of each component in the flue gas, it can accurately reflect the degree of reaction and pollutant formation under oxygen-enriched combustion conditions.

[0079] Specifically, the oxygen-enriched combustion test system also includes an oxygen generating device, the outlet of which is connected to the combustion-supporting gas main pipe 31.

[0080] This technical solution achieves autonomous preparation and flexible allocation of combustion-supporting gas by integrating an oxygen generator into the system. Specifically, the oxygen generator is directly connected to the main combustion-supporting gas pipe 31, and can adjust the oxygen output parameters in real time according to experimental requirements, providing precise and controllable oxidant conditions for the combustion process.

[0081] The oxygen generating device also includes an oxygen concentration regulator, which is used to adjust the oxygen concentration of the combustion-supporting gas output by the oxygen generating device. Specifically, the oxygen concentration of the combustion-supporting gas output by the oxygen generating device ranges from 21% to 93%.

[0082] The aforementioned oxygen-enriched combustion test system also includes an operating device 6, which includes an operating platform 61, a support leg 62, and a ladder 63. The operating platform 61 surrounds the support shell 14, the support leg 62 supports the operating platform 61 on the ground, one end of the ladder 63 is connected to the operating platform 61, and the other end of the ladder 63 is connected to the ground.

[0083] The operating platform 61 provides operating space for test personnel, facilitating the operation and maintenance of the oxygen-enriched combustion test system. The ladder 63 facilitates the access of test personnel to and from the operating platform 61, ensuring both ease of operation and safety. The support legs 62 support the steel structure of the combustion device 1, the operating platform 61, and other components, ensuring the spatial stability of each part of the device.

[0084] Specifically, the flue 41 has a lateral support structure (such as a reinforcing rib). The lateral support structure provides lateral support to the flue 41, preventing the flue 41 from shifting or being damaged under conditions such as flue gas flow, and ensuring the stable operation of the flue 41 system.

[0085] Figure 3 A cross-sectional view of another oxygen-enriched combustion test system provided in this application embodiment is shown below. Figure 3As shown, further, embodiments of this application also propose that a flue gas resource utilization reaction space 411 is provided in the flue 41, and a carbon-containing material inlet 412 is provided in the flue 41, which is connected to the flue gas resource utilization reaction space 411; the combustion-supporting gas conveying device 3 also includes a second combustion-supporting gas branch 33, the combustion-supporting gas main pipe 31 is connected to the inlet of the second combustion-supporting gas branch 33, and the outlet of the second combustion-supporting gas branch 33 can be connected to the flue gas resource utilization reaction space 411.

[0086] Specifically, the flue gas resource recovery reaction space 411 refers to a specific area set within the flue duct 41 for the reaction of flue gas with carbonaceous materials. The carbonaceous material inlet 412 is used to introduce carbonaceous materials into this space, which can be carbon-based materials such as pulverized coal or coke. The second combustion-supporting gas branch is used to supply combustion-supporting gas to the flue gas resource recovery reaction space 411, and the on / off state of the combustion-supporting gas can be controlled by a valve.

[0087] Furthermore, pressure regulators and flow regulators are also installed in the second combustion gas branch to precisely control the supply pressure and flow rate of the combustion gas in the second combustion gas branch.

[0088] Therefore, this technical solution achieves the resource utilization of high-temperature flue gas by setting up a flue gas resource utilization reaction space 411 in the flue 41 and configuring a corresponding carbon-containing material supply and combustion-supporting gas supply system. The carbon-containing material undergoes a gasification reaction in the high-temperature flue gas environment to generate syngas; simultaneously, the oxygen concentration and temperature of the reaction space can be adjusted through the second combustion-supporting gas branch to optimize the reaction conditions.

[0089] Furthermore, this application also proposes that the flue 41 is provided with an air inlet point, which is located on the rear side of the flue gas resource utilization reaction space 411 along the flue gas flow direction of the flue 41.

[0090] Specifically, the air intake point refers to the opening structure on the side wall of the flue 41 for introducing external air, and its location is limited to the downstream area of ​​the flue gas resource utilization reaction space 411 according to the flue gas flow direction.

[0091] As one implementation method, an adjustment valve can be installed at the intake point to precisely control the airflow.

[0092] Therefore, this technical solution achieves two key functions by setting an air injection point in the downstream stage: first, it performs secondary combustion on the high-temperature flue gas that has completed the resource recovery reaction, further oxidizing unreacted combustible components such as CO; second, it reduces the flue gas temperature to within the tolerance range of subsequent treatment equipment by injecting air. Compared with existing technologies, this design avoids interference with the resource recovery reaction caused by upstream air injection, improves energy utilization through staged combustion, and solves the equipment corrosion problem caused by direct emission of high-temperature flue gas. In practical implementation, the location of the injection point and the amount of air injected can be dynamically adjusted based on flue gas composition analysis data to achieve optimal combustion efficiency and heat recovery effect.

[0093] The flue gas duct 42 is equipped with connecting flanges and regulating valves to facilitate subsequent connection to fans or connection to the plant's desulfurization and denitrification system for treatment before discharge.

[0094] Temperature measuring device, flow measuring device, and pressure measuring device are also installed in flue gas duct 42 to measure the flow rate, pressure, and temperature of the discharged flue gas.

[0095] The embodiments of this application have at least the following advantages:

[0096] 1. The combustion device is based on a single vertical flue structure of a coke oven. The number of vertical sections is adjustable and controllable, and the combustion in the vertical flue can be precisely controlled. The modular design enables real-time and precise control of combustion gas (oxygen-enriched) and fuel parameters, thereby improving combustion stability and uniformity.

[0097] 2. Multi-parameter data monitoring: Key process parameters such as flow rate, pressure, temperature, and gas composition are measured and recorded to provide experimental basis for the development and application of oxygen-enriched combustion technology.

[0098] 3. Enhance theoretical verification: The combustion distribution ratio and the coordination ratio of subsequent flue gas resource utilization (coal gasification / activation) units are continuously adjustable, enabling verification of the oxygen-enriched combustion theoretical model under different operating conditions and multiple operating conditions.

[0099] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are included within the scope of protection of the present invention.

Claims

1. An oxygen-enriched combustion test system, characterized in that, include: The combustion device (1) includes a refractory material layer (11), a heat insulation material layer (12), a supporting inner shell (13), and a supporting outer shell (14). The heat insulation material layer (12) and the refractory material layer (11) are stacked sequentially on the inner wall of the supporting inner shell (13). The interior of the supporting inner shell (13) forms a vertical fire channel (15). The supporting outer shell (14) and the supporting inner shell (13) are spaced apart, and a hollow sandwich layer (16) is formed between them. Gas pipeline (2), whose gas outlet is connected to the vertical fire channel (15); The combustion-supporting gas conveying device (3) includes a combustion-supporting gas main pipe (31) and multiple first combustion-supporting gas branches (32). The inlets of the combustion-supporting gas main pipe (31) and the multiple first combustion-supporting gas branches (32) are connected, and the outlets of the multiple first combustion-supporting gas branches (32) can be connected to different height positions of the vertical fire channel (15) respectively. The flue device (4) includes a flue (41) and a flue gas pipe (42), wherein the two ends of the flue (41) are respectively connected to the vertical fire channel (15) and the flue gas pipe (42); The control device includes a pressure regulator and a flow regulator. The pressure regulator is installed in at least one of the gas pipeline (2), the main gas pipe (31) and a plurality of first gas pipes (32). The flow regulator is installed in at least one of the gas pipeline (2), the main gas pipe (31) and a plurality of first gas pipes (32). The measuring device (5) includes a temperature measuring device, a flow measuring device, a pressure measuring device, an oxygen concentration measuring device, and a flue gas composition measuring device. The temperature measuring device is disposed in at least one of the refractory material layer (11), the vertical flue (15), the gas pipeline (2), the main combustion gas pipe (31), the plurality of first combustion gas branches (32), the flue (41), and the flue gas pipeline (42). The flow measuring device is disposed in the gas pipeline (2), the main combustion gas pipe (31), and the... The pressure measuring device is located in at least one of the plurality of first combustion-supporting gas branches (32), the gas pipeline (2), the combustion-supporting gas main pipe (31), the plurality of first combustion-supporting gas branches (32) and the flue (41), the oxygen concentration measuring device is located in at least one of the combustion-supporting gas main pipe (31) and the plurality of first combustion-supporting gas branches (32); the flue gas component measuring device is located in at least one of the flue (41) or the flue gas pipeline (42); The central control device selects and connects the first combustion gas branch (32), the gas pipeline (2), and the flue gas pipeline (42) corresponding to at least one height position of the vertical fire channel (15) according to preset or user-input instruction information.

2. The oxygen-enriched combustion test system according to claim 1, characterized in that, The combustion device (1) further includes a cooling fan. The supporting shell (14) is provided with a first vent and a second vent that communicate with the outside. The first vent and the second vent are respectively connected to the hollow interlayer (16). The cooling fan is located at the first vent.

3. The oxygen-enriched combustion test system according to claim 2, characterized in that, The combustion device (1) further includes an air volume controller, which is electrically connected to the cooling fan.

4. The oxygen-enriched combustion test system according to claim 1, characterized in that, The flue (41) is provided with an air intake point.

5. The oxygen-enriched combustion test system according to claim 1, characterized in that, Along the height direction of the vertical fire channel (15), the outlets of a plurality of first combustion-supporting gas branches (32) are connected to the vertical fire channel (15) at equal intervals.

6. The oxygen-enriched combustion test system according to claim 5, characterized in that, The number of the first combustion-supporting gas branches (32) is greater than or equal to 3.

7. The oxygen-enriched combustion test system according to claim 1, characterized in that, Along the height direction of the vertical fire channel (15), the temperature measuring device includes multiple flue gas thermometers (51), which are arranged at different height positions of the vertical fire channel (15) to measure the temperature at multiple height positions of the vertical fire channel (15).

8. The oxygen-enriched combustion test system according to claim 1, characterized in that, Also includes: An oxygen generator, the outlet of which is connected to the main combustion-supporting gas pipe (31).

9. The oxygen-enriched combustion test system according to claim 8, characterized in that, The oxygen generating device also includes an oxygen concentration regulator, which is used to adjust the oxygen concentration of the combustion-supporting gas output by the oxygen generating device.

10. The oxygen-enriched combustion test system according to claim 1, characterized in that, Also includes: The operating device (6) includes an operating platform (61), a support leg (62) and a ladder (63). The operating platform (61) surrounds the support shell (14). The support leg (62) supports the operating platform (61) on the ground. One end of the ladder (63) is connected to the operating platform (61) and the other end is connected to the ground.

11. The oxygen-enriched combustion test system according to claim 1, characterized in that, The central control device selects and connects the first combustion-supporting gas branch (32) corresponding to at least two height positions of the vertical fire channel (15) according to preset or user-input instruction information; The central control device also allocates the flow distribution ratio of at least two first combustion-supporting gas branches (32) according to the instruction information.

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