Combustion nozzle capable of adjusting flame direction and combustion system

Abstract

The invention discloses a burner capable of adjusting the flame direction and a combustion system, relates to the technical field of industrial combustion, and can solve the technical problem that the flame direction is difficult to adjust accurately in the prior art. The burner comprises a burner shell, and a spray gun assembly is arranged in the burner shell. The spray gun assembly is provided with combustion-supporting medium nozzles and a fuel nozzle, the number of the combustion-supporting medium nozzles is more than one, the combustion-supporting medium nozzles are circumferentially distributed with the fuel nozzle as the center at intervals at the same angle, each combustion-supporting medium nozzle is independently connected with the output end of one combustion-supporting medium inlet pipe, and the fuel nozzle is connected with the output end of the fuel inlet pipe; each combustion-supporting medium inlet pipe and each fuel inlet pipe are independently connected with a flow sensor and an adjusting valve, and the flow sensors and the adjusting valves are used for achieving control over the flame direction by adjusting the flow of the different combustion-supporting medium inlet pipes and the flow of the different fuel inlet pipes. Compared with the prior art, the device has higher operation flexibility and working efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of industrial combustion, in particular to a combustion nozzle with adjustable flame direction and a method for adjusting the flame direction. BACKGROUND

[0002] In the technical field of industrial combustion, the combustion nozzle is the core device for mixing and burning fuel and combustion medium. The thermodynamic performance and structural design of the combustion nozzle directly affect the combustion efficiency, thermal field distribution and process stability. Studies have shown that the flame direction, as a key parameter in the design of the combustion nozzle, plays a decisive role in the flame shape (such as coverage range and temperature gradient) and the heating uniformity of thermal equipment (such as kiln and furnace). Therefore, the accurate regulation of the flame direction has become an important research direction for optimizing the combustion process and improving energy utilization.

[0003] Most of the existing combustion nozzles have a relatively fixed flame direction, which cannot meet the demand of flexible adjustment of the flame direction. If the flame direction needs to be adjusted, the thermal equipment such as kiln usually needs to be temporarily shut down, the position of the combustion nozzle positioning support needs to be adjusted, and even the equipment needs to be modified, which is time-consuming and labor-intensive. Moreover, the adjustment of the flame direction by the combustion nozzle positioning support needs to be repeatedly debugged to meet the process requirements, which causes energy loss and equipment wear and tear.

[0004] Chinese patent document CN208332266U discloses a combustion nozzle with controllable flame direction. The first push rod slides in the first through hole to push the flame jet head and the fire hole to rotate on the shaft, thereby adjusting the flame direction. At the same time, the second push rod slides in the second through hole to push the arc-shaped plate to rotate to control the flame size.

[0005] However, this mechanical adjustment method has the problems of limited adjustment range and difficulty in achieving accurate control. Moreover, the mechanical adjustment method usually requires the operator to have certain professional skills and experience, and the adjustment process is complex and time-consuming. In addition, due to the wear and tear and aging of mechanical parts, the adjustment accuracy and stability will be affected after long-term use. Furthermore, the existing technology needs to be repeatedly debugged when adjusting the flame direction, which increases the energy loss and equipment wear and tear, and the debugging process further aggravates the carbon emission pressure. SUMMARY

[0006] In order to solve one or more technical problems in the prior art, the present application provides a combustion nozzle with adjustable flame direction, comprising a combustion nozzle shell, wherein a lance assembly is arranged in the combustion nozzle shell. The lance assembly is provided with combustion-supporting medium nozzles and fuel nozzles, the number of the combustion-supporting medium nozzles is more than two and the combustion-supporting medium nozzles are distributed in a circle with the fuel nozzles as the center and at the same angle, each combustion-supporting medium nozzle is independently connected with the output end of a combustion-supporting medium inlet pipe, the fuel nozzles are connected with the output end of a fuel inlet pipe, each combustion-supporting medium inlet pipe and the fuel inlet pipe are independently connected with a flow sensor and an adjusting valve, so as to control the flame direction by adjusting the flow of different combustion-supporting medium inlet pipes and the fuel inlet pipe.

[0007] Preferably, the number of the combustion-supporting medium nozzles is eight and the combustion-supporting medium nozzles are distributed in a circle with the fuel nozzles as the center and at an angle of 45°.

[0008] Preferably, the lance assembly is further provided with an annular air channel, and the air outlet of the annular air channel is arranged outside the combustion-supporting medium nozzles.

[0009] The application further provides a combustion system with adjustable flame direction, comprising the combustion nozzle. Each combustion-supporting medium inlet pipe is independently connected with a combustion-supporting medium inlet flow valve, the downstream of each combustion-supporting medium inlet flow valve is independently connected with a combustion-supporting medium inlet flow transmitter, and the combustion-supporting medium inlet flow transmitter is independently connected with a combustion-supporting medium inlet flow indication controller, the combustion-supporting medium inlet flow indication controller is used to transmit the flow information collected by the combustion-supporting medium inlet flow transmitter to a flame control system, and the flame control system adjusts the combustion-supporting medium inlet flow valve according to the flow information transmitted by the combustion-supporting medium inlet flow indication controller to control the flame direction.

[0010] Preferably, the fuel inlet pipe is connected with a fuel inlet flow valve, the downstream of the fuel inlet flow valve is connected with a fuel inlet flow transmitter, the fuel inlet flow transmitter is connected with a fuel inlet flow indication controller, the fuel inlet flow indication controller is used to transmit the flow information collected by the fuel inlet flow transmitter to the flame control system, and the flame control system adjusts according to the flow information transmitted by the combustion-supporting medium inlet flow indication controller and the flow information transmitted by the fuel inlet flow indication controller to control the flame direction.

[0011] Preferably, the input end of all the combustion-supporting medium inlet pipes is connected to a same combustion-supporting medium main pipe, and the combustion-supporting medium main pipe is provided with a combustion-supporting medium main valve. The input end of the fuel inlet pipe is connected to a fuel delivery pipe, and the fuel delivery pipe is provided with a fuel main valve. The combustion system is also provided with a fire-retardant medium delivery pipe, which is provided with a fire-retardant medium total valve, and the output end of the fire-retardant medium delivery pipe is connected to the fuel delivery pipe and located downstream of the fuel total valve. The combustion medium total valve and the fuel total valve are both fail-closed valves, and the fire-retardant medium total valve is a fail-open valve.

[0012] Preferably, the combustion medium total pipe is connected with a combustion medium total flow transmitter for collecting the flow in the combustion medium total pipe, the combustion medium total flow transmitter is arranged downstream of the combustion medium total valve, and the combustion medium total flow transmitter is connected with a combustion medium total flow indication controller for transmitting the flow information collected by the combustion medium total flow transmitter to the flame control system.

[0013] Preferably, the combustion medium total pipe is connected with a combustion medium total pressure transmitter for collecting the pressure in the combustion medium total pipe, the combustion medium total pressure transmitter is arranged downstream of the combustion medium total flow transmitter, and the combustion medium total pressure transmitter is connected with a combustion medium total pressure indicator for transmitting the pressure information collected by the combustion medium total pressure transmitter to the flame control system.

[0014] Preferably, the fuel inlet pipe is connected with a fuel inlet pressure transmitter for collecting the pressure in the fuel inlet pipe, the fuel inlet pressure transmitter is arranged downstream of the fuel inlet flow transmitter, and the fuel inlet pressure transmitter is connected with a fuel inlet pressure indicator for transmitting the pressure information collected by the fuel inlet pressure transmitter to the flame control system.

[0015] Preferably, the combustion medium total pressure indicator and the fuel inlet pressure indicator are connected to the same differential pressure indication controller, the differential pressure indication controller calculates the pipeline differential pressure according to the pressure information transmitted by the combustion medium total pressure indicator and the fuel inlet pressure indicator and transmits the pipeline differential pressure to the flame control system, and the flame control system monitors according to the pipeline differential pressure, and when the pipeline differential pressure exceeds the preset range, the flame control system controls the combustion medium total valve and the fuel total valve to be closed and controls the fire-retardant medium total valve to be opened.

[0016] The present application has the following advantages: The present application can realize accurate adjustment of the flame direction by designing a unique structure of the combustion nozzle and applying it to the combustion system capable of independently adjusting the fuel and combustion medium flow, and is no longer subject to the fixed flame direction, and can flexibly adjust the flame direction according to the actual demand, thereby improving the flexibility and convenience of the combustion operation.

[0017] The present application can greatly reduce energy consumption and equipment loss caused by adjusting the flame direction without temporarily shutting down the thermal equipment such as the kiln, adjusting the position of the positioning support or modifying the equipment, and realizes energy saving and consumption reduction.

[0018] Based on the adjustable flame direction combustion system provided by the present application, the flame direction can be dynamically adjusted in real time by program control and online adjustment of the flow, thereby replacing the traditional shutdown manual disassembly. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, illustrate the present application together with the embodiments thereof, and explain the present application, but do not limit the present application.

[0020] Figure 1 is a sectional view of a combustion nozzle according to an embodiment of the present application; Figure 2 is a schematic view of the outlet of a lance assembly according to an embodiment of the present application; Figure 3 is a schematic view of a combustion system according to an embodiment of the present application; Figure 4 is Figure 3 is an enlarged view of the left side of the figure; Figure 5 is Figure 3 is an enlarged view of the right side of the figure; Figure 6 is a schematic view of the installation of a flame detector probe according to an embodiment of the present application.

[0021] In the figure: 1, combustion nozzle housing; 11, end-of-travel stop; 12, combustion medium distribution chamber; 2, lance assembly; 21, combustion medium injection port; 22, fuel injection port; 221, fuel spoiler; 23, annular air passage; 231, air outlet; 232, air filter device; 3, combustion medium inlet pipe; FV001A / FV001B~FV001N, combustion medium inlet flow valve; FT002A / FT002B~FT002N, combustion medium inlet flow transmitter; FIC002A / FIC002B~FIC002N, combustion medium inlet flow indication controller; GT001A / GT001B~GT001N, combustion medium inlet flame detector; GI001A / GI001B~GI001N, combustion medium inlet flame detection indication instrument; 4. Fuel inlet pipe; FV002, fuel inlet flow valve; FT003, fuel inlet flow transmitter; FIC003, fuel inlet flow indicating controller; PT002, fuel inlet pressure transmitter; PI002, fuel inlet pressure indicator; GT002, fuel inlet flame detector; GI002, fuel inlet flame detection indicator; 51. Flame detector probe; 52. protective cover; 53. equipment housing; 54. refractory material; 55. flame; YV001, total oxidant valve; FT001, total oxidant flow transmitter; FIC001, total oxidant flow indicating controller; PT001, total oxidant pressure transmitter; PI001, total oxidant pressure indicator; YV002, fuel total valve; YV003, total flame retardant valve; PDIC001, pressure differential indicating controller; I / P, current-to-pressure converter; GL001, first gas leak detector; GL002, second gas leak detector; GL003, third gas leak detector; GS001, first gas switch; GS002, second gas switch; GS003, third gas switch; SOV001, first solenoid operated valve; SOV002, second solenoid operated valve; SOV003, third solenoid operated valve. DETAILED DESCRIPTION

[0022] The present application will now be described in detail with reference to the drawings. Various examples are provided by way of explanation of the application and are not meant as a limitation thereon. In fact, it will be apparent to those skilled in the art that modifications and variations can be made in the present application without departing from the scope or spirit of the application. For example, features shown or described as part of one embodiment can be used with another embodiment to yield still a further embodiment. It is, therefore, desired to be protected in the appended claims as they pertain to this application as broadly as the law allows. Furthermore, reference characters used with the exemplary embodiments herein to facilitate explanation are intended to have generic application where possible.

[0023] In the description of this invention, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and do not require the invention to be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on the invention. The terms "connected," "linked," and "set up" used in this invention should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; they can refer to a direct connection or an indirect connection through intermediate components. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0024] Example 1: like Figures 1-5 As shown, an adjustable flame direction burner includes a burner housing 1, and a spray gun assembly 2 is disposed inside the burner housing 1. The spray gun assembly 2 is provided with a combustion medium nozzle 21 and a fuel nozzle 22. There are two or more combustion medium nozzles 21, which are distributed in a circle with the same angle around the fuel nozzle 22 as the center. Each combustion medium nozzle 21 is independently connected to the output end of a combustion medium inlet pipe 3. The fuel nozzle 22 is connected to the output end of a fuel inlet pipe 4. Each combustion medium inlet pipe 3 and fuel inlet pipe 4 is independently connected to a flow sensor and a regulating valve, so as to control the flame direction by adjusting the flow of different combustion medium inlet pipes 3 and fuel inlet pipes 4.

[0025] In practical implementation, the burner of this invention, with its unique structure, can flexibly adjust the flame direction based on the principles of flame hydrodynamics by adjusting the flow rate of the combustion medium in different directions, combined with the low-pressure zone effect generated by high-speed flow, the influence of momentum conservation and turbulent mixing, and the nonlinear response of flow rate adjustment. Therefore, this invention does not experience mechanical wear during flame direction adjustment and requires no downtime.

[0026] More specifically, the burner nozzle can adopt a modular design. For example, the spray gun assembly 2 and the burner nozzle housing 1 can be connected by detachable methods such as flanges and bolts, which facilitates disassembly and replacement. The sealing and isolation between different components can be achieved by a detachable sealing partition 11.

[0027] Example 2: Furthermore, the number of combustion medium nozzles 21 is 8, and they are distributed in a circle with a 45° angle between them and the fuel nozzle 22 as the center.

[0028] In specific implementation, the range of the adjusting valve of each combustion-supporting medium inlet pipe 3 and the fuel inlet pipe 4 can be 0-100%, so that the combustion nozzle can change the injection amount of the combustion-supporting medium in the fuel circumferential direction by adjusting the opening degree of the valve to adjust the flame distribution and thus the flame direction. The more the number of combustion-supporting medium injection ports 21, the higher the resolution of the flame direction / angle adjustment, and 8 combustion-supporting medium injection ports 21 can already meet the needs of most industrial applications. The number of combustion-supporting medium injection ports can be flexibly increased or decreased as the needs of the application equipment change, to ensure that the fineness of the flame direction adjustment is adapted to the equipment.

[0029] Further, as shown in Figure 1 The direction of the pipe opening of the combustion-supporting medium injection port 21 can be designed at an angle with the direction of the pipe opening of the fuel injection port 22 to optimize the flame shape.

[0030] Embodiment 3: Further, the lance assembly 2 is also provided with an annular air passage 23, and the air outlet 231 of the annular air passage 23 is arranged outside the combustion-supporting medium injection port 21.

[0031] In specific implementation, the annular air passage 23 can provide additional air flow, which is helpful for the stability of the flame. On the one hand, the annular air passage 23 can automatically suck in air by using the negative pressure suction effect, increase the oxygen content in the combustion zone, and improve the combustion efficiency. On the other hand, while automatically sucking in air, the annular air passage 23 can also form a protective "air curtain" outside the combustion-supporting medium injection port 21, so as to inhibit the spread of the flame and improve the concentration of the flame direction.

[0032] Preferably, an air filtering device 232 is arranged at the air inlet of the annular air passage 23. The air filtering device 232 can be used to prevent large-particle dust from scouring the combustion nozzle. More specifically, a valve can also be arranged at the air inlet of the annular air passage 23 to adjust the air suction amount.

[0033] Preferably, a combustion-supporting medium distribution cavity 12 is arranged between the combustion-supporting medium inlet pipe 3 and the combustion-supporting medium injection port 21. The combustion-supporting medium distribution cavity 12 can balance the pressure and stabilize the flow, expand the cavity volume to reduce the influence of the pressure fluctuation of the combustion-supporting medium inlet pipe 3 on the output of the combustion-supporting medium injection port 21, and ensure the accuracy of the flow adjustment of each injection port.

[0034] Preferably, a fuel spoiler 221 is arranged upstream of the fuel injection port 22. The fuel spoiler 221 can be designed in the structure of spoiler blades or a perforated baffle, so that the fuel changes from laminar flow to turbulent flow, thereby increasing the contact area of the fuel and the combustion-supporting medium and improving the mixing efficiency.

[0035] Although the present application mainly solves the adjustment of the flame direction, the technical solution of the present application is also applicable to the adjustment of the flame angle. The adjustment of the flame direction refers to changing the pointing direction of the flame so that it can point to a specific target area, focusing on the change of the pointing position of the flame in space; the adjustment of the flame angle mainly changes the opening angle of the flame itself, emphasizing the angle change of the flame form. For example, in an industrial furnace, the adjustment of the flame direction can make the flame point to the position of the material that needs to be heated; and the adjustment of the flame angle can make the flame become more concentrated (the angle becomes smaller) or more dispersed (the angle becomes larger). In industrial production, when precise heating of a specific area is needed, such as focusing on heating the material at a local position in a furnace, the adjustment of the flame direction can be performed to make the flame accurately point to the area. In some scenarios where the uniformity of heating is required to be high, or the coverage range of the flame needs to be controlled, for example, in a large-area heat treatment process, the adjustment of the flame angle can be performed to make the flame uniformly cover the heating area, ensuring the consistency of heating.

[0036] In the present application, the adjustment of the flame direction can be realized by adjusting the input proportion of the flow of different combustion-supporting media inlet pipes 3. Since the combustion-supporting media nozzles 21 are distributed in a circle with the fuel nozzle 22 as the center and the same angle interval, changing the flow of the combustion-supporting media and fuel at each nozzle can make the flame receive different directional thrust, thereby changing the direction of the flame. The adjustment of the flame angle is related to not only the flow of the combustion-supporting media and fuel, but also the structural design of the burner. In addition, the annular air channel 23 provided in the lance assembly 2 has its air outlet 231 surrounding the outside of the combustion-supporting media nozzle 21, and by adjusting the air flow and pressure of the annular air channel 23, the diffusion degree of the flame can also be changed, thereby adjusting the flame angle.

[0037] Embodiment 4: A combustion system with adjustable flame direction, comprising the burner, characterized in that: Each of the combustion-supporting medium inlet pipes 3 is independently connected with a combustion-supporting medium inlet flow valve (FV001A / FV001B~FV001N), and the downstream of each combustion-supporting medium inlet flow valve (FV001A / FV001B~FV001N) is independently connected with a combustion-supporting medium inlet flow transmitter (FT002A / FT002B~FT002N), and each combustion-supporting medium inlet flow transmitter (FT002A / FT002B~FT002N) is independently connected with a combustion-supporting medium inlet flow indicating controller (FIC002A / FIC002B~FIC002N), which is used to transmit the flow information collected by the combustion-supporting medium inlet flow transmitter (FT002A / FT002B~FT002N) to a flame control system, and the flame control system adjusts the combustion-supporting medium inlet flow valve (FV001A / FV001B~FV001N) according to the flow information transmitted by the combustion-supporting medium inlet flow indicating controller (FIC002A / FIC002B~FIC002N) to realize the control of the flame direction.

[0038] In particular implementation, the combustion nozzle provided by the present application is combined with the automatic control system in the prior art, and the automatic adjustment of the flame direction can be realized based on the flow closed-loop control. The combustion-supporting medium inlet flow valve (FV001A / FV001B~FV001N) can adjust the flow of each branch; the combustion-supporting medium inlet flow transmitter (FT002A / FT002B~FT002N) can collect flow data in real time (such as using an electromagnetic flowmeter or a vortex flowmeter); and the combustion-supporting medium inlet flow indicating controller (FIC002A / FIC002B~FIC002N) can convert the flow signal into a standard signal (such as a 4~20mA electric signal) and transmit it to the flame control system, and receive a control instruction to dynamically adjust the valve opening degree.

[0039] More specifically, the combustion-supporting medium inlet flow indicating controller (FIC002A / FIC002B~FIC002N) can be used for PID continuous adjustment, so that the corresponding combustion-supporting medium inlet flow valve (FV001A / FV001B~FV001N) runs at any opening degree between 0~100%: for example, the flame control system compares the real-time flow value transmitted by the combustion-supporting medium inlet flow indicating controller (FIC002A / FIC002B~FIC002N) with the set flow value for realizing a specific flame target direction, calculates the valve adjustment amount through PID, and drives the combustion-supporting medium inlet flow valve (FV001A / FV001B~FV001N) to execute the action.

[0040] The hardware base of the flame control system can be realized based on the PLC (Programmable Logic Controller) or DCS (Distributed Control System) in the prior art. Based on the hardware base, the present application can realize online adjustment. The "online adjustment" refers to real-time flame direction adjustment under the condition that the combustion system is normally operated (the production line of the kiln and other equipment is not stopped). For example, when the temperature on the left side of the kiln is lower than the set value, the system automatically increases the flow of the combustion-supporting medium on the right side, so that the flame deflects to the left and the heating intensity on the left side is improved.

[0041] Figure 3 A in the dashed line connection with FIC002A / FIC002B~FIC002N in FIG. 2 represents several logical positions of the flame control system, but is not limited to only these several positions. For example, Figure 3 All the instruments in FIG. 2 can be connected to the flame control system, and only part of the lines is omitted for the purpose of clearly showing the technical principle of the present application.

[0042] In addition, although Figure 3 In FIG. 2, only three combustion-supporting medium inlet pipes 3 are drawn on the right side, but N in the pipe corresponding to FV001N represents any number of pipes, until each combustion-supporting medium nozzle 21 can be independently connected to one combustion-supporting medium inlet pipe 3. For example, if a combustion nozzle has a total of four combustion-supporting medium nozzles 21, in addition to the pipes corresponding to FV001A and FV001B, two pipes (FV001C and FV001D) need to be added (at this time, N represents C and D two pipes).

[0043] Based on the combustion system provided by the present application, the defect that the process requirements can only be ensured by repeated tests when adjusting the flame direction can be avoided. Therefore, the loss of energy and the wear and tear of the equipment can be greatly reduced, and the work efficiency can be improved. Based on the combustion system provided by the present application, only one-time investment is needed, and the equipment does not need to be modified when adjusting the flame direction subsequently, so that the equipment investment can be reduced.

[0044] The present application can be widely applied in the fields of combustion technology, fuel control technology, and flame direction / angle control technology. In particular, in industrial production, various thermal equipment such as kilns, boilers and the like need to use combustion nozzles for heating, and the combustion nozzle of the present application can adjust the flame direction online to meet the needs of different operating processes, improve production efficiency, and reduce energy consumption and equipment investment. At the same time, since the combustion nozzle of the present application can realize online adjustment of the flame direction without stopping, the downtime of the equipment can be greatly reduced, and the utilization rate of the equipment can be improved.

[0045] Example 5: Further, the fuel inlet pipe 4 is connected with a fuel inlet flow valve (FV002), downstream of which is connected a fuel inlet flow transmitter (FT003), which is connected with a fuel inlet flow indication controller (FIC003) for transmitting flow information collected by the fuel inlet flow transmitter (FT003) to the flame control system, which adjusts according to the flow information transmitted by the combustion-supporting medium inlet flow indication controller (FIC002A / FIC002B~FIC002N) and the flow information transmitted by the fuel inlet flow indication controller (FIC003) to realize control of the flame direction.

[0046] In implementation, based on Example 4, adjusting the flow of the combustion-supporting medium alone can change the flame direction. In this example, based on the coordinated adjustment of the flow of the combustion-supporting medium and the flow of the fuel, the flame control system can automatically adjust the flow of the fuel according to the total flow of the combustion-supporting medium (for example, if the flow of the combustion-supporting medium increases by 10%, the flow of the fuel is simultaneously increased by 10%), while ensuring uniform local air-fuel ratio in the combustion nozzle through flow distribution of the combustion-supporting medium branch to further improve the accuracy of the flame direction, thereby meeting the needs of the process for thermal field uniformity and target temperature zone.

[0047] Example 6: Further, the input ends of all the combustion-supporting medium inlet pipes 3 are connected to the same combustion-supporting medium main pipe, which is provided with a combustion-supporting medium main valve (YV001); The input end of the fuel inlet pipe 4 is connected to a fuel delivery pipe, which is provided with a fuel main valve (YV002); The combustion system is also provided with a fire-retardant medium delivery pipe, which is provided with a fire-retardant medium main valve (YV003), and the output end of the fire-retardant medium delivery pipe is connected to the fuel delivery pipe and located downstream of the fuel main valve (YV002); Both the combustion-supporting medium main valve (YV001) and the fuel main valve (YV002) are fail-closed valves, and the fire-retardant medium main valve (YV003) is a fail-open valve.

[0048] In specific implementation, the flame control system can monitor abnormalities (such as sudden pressure drop, flame extinguishment, flow overrun) through sensors, determine fault types (such as pipeline leakage, power failure), and immediately close the combustion-supporting medium total valve (YV001) and the fuel total valve (YV002) to cut off the supply of combustion-supporting medium and fuel when a fault occurs, and open the fire-retardant medium total valve (YV003) to inject fire-retardant medium (such as nitrogen) to replace the residual fuel in the pipeline and eliminate safety hazards. The fuel that can be used in the present application includes hydrogen and natural gas, the combustion-supporting medium includes air, oxygen, and oxygen-enriched air, and the fire-retardant medium includes nitrogen, carbon dioxide, and inert gas.

[0049] Example 7 Further, the combustion-supporting medium total pipe is connected with a combustion-supporting medium total flow transmitter (FT001) for collecting the flow in the combustion-supporting medium total pipe, the combustion-supporting medium total flow transmitter (FT001) is arranged downstream of the combustion-supporting medium total valve (YV001), and the combustion-supporting medium total flow transmitter (FT001) is connected with a combustion-supporting medium total flow indication controller (FIC001) for transmitting the flow information collected by the combustion-supporting medium total flow transmitter (FT001) to the flame control system.

[0050] In specific implementation, the flame control system can compare the total combustion-supporting medium flow with the theoretical demand (such as the total combustion-supporting medium demand calculated based on the fuel flow), and if the deviation exceeds a threshold value (such as ±10%), it can be determined that the combustion-supporting medium total pipe is faulty (such as combustion-supporting medium total pipe leakage, valve failure, etc.). The flame control system can also compare the total flow of the combustion-supporting medium total flow indication controller (FIC001) with the sum of the combustion-supporting medium inlet flow indication controllers (FIC002A / FIC002B~FIC002N) in each branch to identify whether a branch leakage occurs (such as when the sum of each branch deviates from the total pipe flow by >5%, it can be determined that a branch leakage occurs). After the flame control system determines that a fault has occurred, it can close the combustion-supporting medium total valve (YV001) and the fuel total valve (YV002) and open the fire-retardant medium total valve (YV003) to inject fire-retardant medium.

[0051] Example 8 Further, the combustion-supporting medium total pipe is connected with a combustion-supporting medium total pressure transmitter (PT001) for collecting the pressure in the combustion-supporting medium total pipe, the combustion-supporting medium total pressure transmitter (PT001) is arranged downstream of the combustion-supporting medium total flow transmitter (FT001), and the combustion-supporting medium total pressure transmitter (PT001) is connected with a combustion-supporting medium total pressure indicator (PI001) for transmitting the pressure information collected by the combustion-supporting medium total pressure transmitter (PT001) to the flame control system.

[0052] In implementation, the combustion-supporting medium total pressure transmitter (PT001) collects the combustion-supporting medium total pipe pressure signal in real time and transmits it to the combustion-supporting medium total pressure indicator (PI001) for real-time feedback of the combustion-supporting medium total pipe pressure, which can be used to assist in judging the stability of the combustion system. For example, if the combustion-supporting medium total pressure is lower than the lower limit, it may lead to insufficient combustion-supporting, and if the combustion-supporting medium total pressure drops suddenly, it can be judged as a pipe rupture fault, and the flame control system immediately closes the combustion-supporting medium total valve (YV001) and the fuel total valve (YV002) and opens the combustion-arresting medium total valve (YV003) to inject the combustion-arresting medium.

[0053] Example 9: Further, the fuel inlet pipe 4 is connected with a fuel inlet pressure transmitter (PT002) for collecting the pressure in the fuel inlet pipe 4, which is arranged downstream of the fuel inlet flow transmitter (FT003), and the fuel inlet pressure transmitter (PT002) is connected with a fuel inlet pressure indicator (PI002) for transmitting the pressure information collected by the fuel inlet pressure transmitter (PT002) to the flame control system.

[0054] In implementation, the fuel inlet pressure transmitter (PT002) collects the fuel pipe pressure, which is transmitted to the flame control system through the fuel inlet pressure indicator (PI002) to realize the monitoring of the fuel supply pressure. Too low fuel supply pressure will lead to insufficient fuel flow, and too high fuel supply pressure will cause pipe leakage. When the pressure is abnormal, the flame control system can close the combustion-supporting medium total valve (YV001) and the fuel total valve (YV002) and open the combustion-arresting medium total valve (YV003) to inject the combustion-arresting medium.

[0055] Example 10: Further, the combustion-supporting medium total pressure indicator (PI001) and the fuel inlet pressure indicator (PI002) are connected to the same differential pressure indication controller (PDIC001), which calculates the pipe differential pressure according to the pressure information transmitted by the combustion-supporting medium total pressure indicator (PI001) and the fuel inlet pressure indicator (PI002) and transmits the pipe differential pressure to the flame control system, which monitors according to the pipe differential pressure, and when the pipe differential pressure exceeds the preset range, the flame control system controls the combustion-supporting medium total valve (YV001) and the fuel total valve (YV002) to close and controls the combustion-arresting medium total valve (YV003) to open.

[0056] In practice, the differential pressure interlock can be realized based on the setting of the differential pressure indicating controller (PDIC001). By calculating the difference between the total pressure of the combustion medium and the pressure of the fuel inlet pipe 4, if the differential pressure exceeds the preset range (e.g., if the combustion medium pressure is too low, it will cause the fuel to backfire), the combustion medium total valve (YV001) and the fuel total valve (YV002) are immediately closed, and the fire-resistant medium total valve (YV003) is opened to inject fire-resistant medium. The differential pressure interlock can be set to program I10.

[0057] Preferably, each combustion medium inlet pipe 3 is provided with an independent combustion medium inlet flame detector (GT001A / GT001A / GT001N) on one side to detect the flame state at the combustion medium nozzle 21 and feed the detection signal to the flame control system. The fuel inlet pipe 4 is provided with a fuel inlet flame detector (GT002) on one side to detect the flame state at the fuel nozzle 22 and feed the detection signal to the flame control system. The flame control system monitors the flame state according to the detection signals of the combustion medium inlet flame detectors (GT001A / GT001A / GT001N) and the fuel inlet flame detector (GT002). When an abnormal flame state is detected, the flame control system controls the combustion medium total valve (YV001) and the fuel total valve (YV002) to close and controls the fire-resistant medium total valve (YV003) to open.

[0058] The flame interlock can be realized based on the setting of the flame detector (GT). The flame detector monitors the flame state in real time. When there is no flame or the intensity is insufficient, it triggers the combustion medium total valve (YV001) and the fuel total valve (YV002) to close and the fire-resistant medium total valve (YV003) to open to inject fire-resistant medium. The flame interlock can be set to program I20.

[0059] The double insurance mechanism of the differential pressure interlock and the flame interlock ensures that if one type fails, the other type can still ensure safety.

[0060] Preferably, each combustion medium inlet flame detector (GT001A / GT001A / GT001N) is connected with an independent combustion medium inlet flame detection indicator (GI001A / GI001A / GI001N), and the fuel inlet flame detector (GT002) is connected with a fuel inlet flame detection indicator (GI002).

[0061] The flame detector (GT) can use a flame detector probe 51 as the detection end. The flame detector probe 51 can be installed near the combustion nozzle and aligned with the flame area through an optical lens. More specifically, as shown in Figure 6As shown, the flame detector probe 51 can be placed inside the protective cover 52, which passes through the equipment housing 53 and the refractory material 54 and is aligned with the flame 55. The flame detector probe 51 can be an industrial camera, which can then capture images to indicate the presence or absence of a flame (basic function). Simultaneously, to facilitate the adjustment of the flame angle, the flame deflection can also be detected by capturing images with the industrial camera and fed back to the program.

[0062] The flame detection instrument (GT) can monitor the presence and intensity of the branch flame in real time. The signal can be transmitted to the flame control system to assist the flame direction control strategy to complete the flow control of gas and oxygen. On the other hand, it can be displayed intuitively by the flame detection indicator (GI) to help the on-site operator identify abnormalities.

[0063] More specifically, such as Figure 3 As shown, current-to-pressure converters (I / P), gas leak detectors (GL001 / GL002 / GL003), gas switches (GS001 / GS002 / GS003), and solenoid valves (SOV001 / SOV002 / SOV003) can also be installed in the combustion system at corresponding locations.

[0064] Preferably, the first gas leak detector (GL001) is connected to the combustion medium main valve (YV001) via the first gas switch (GS001); the second gas leak detector (GL002) is connected to the fuel main valve (YV002) via the second gas switch (GS002); and the third gas leak detector (GL003) is connected to the flame retardant medium main valve (YV003) via the third gas switch (GS003).

[0065] Specifically, the reason why the gas leakage detector (GL) is not directly connected to the total valve (YV) is that, on the one hand, as a detection instrument, the gas leakage detector (GL) outputs a low-power sensing signal (such as 4-20 mA current or 0-5 V voltage), while driving a large valve such as the total valve (YV) requires a high-power control signal (such as 24 V DC or 220 V AC), and the gas switch (GS) is needed as a "adapter"; on the other hand, when the gas leakage detector (GL) detects a leakage, the system needs to meet multiple interlocking conditions to allow the valve to be closed, and this multi-level control logic meets the instrument safety regulations; in addition, when the gas leakage detector (GL) itself fails (such as wire breakage or short circuit), the gas switch (GS) can be designed to be in a safety-oriented state (for example, forcibly outputting a valve-closing signal), while the gas leakage detector (GL) directly connected to the total valve (YV) may cause a dangerous failure (such as being unable to close the valve when leaking), and the gas switch (GS) has a built-in fault detection, while the gas leakage detector (GL) does not. The gas switch (GS) is a control element for automatically or manually operating the total valve (YV) according to the system state (such as a leakage signal or pressure anomaly), and has a direct technical association with the gas leakage detector (GL). The gas leakage detector (GL) monitors the leakage in the gas pipeline in real time (such as by detecting the change in gas concentration through a sensor); when the gas leakage detector (GL) detects a leakage, it outputs an electrical signal (for example, a high-level alarm signal) to the gas switch (GS). As an intermediate controller, the gas switch (GS) triggers an action (such as switching internal circuits or valve states) after receiving the signal, and then drives the total valve (YV) to close. This linkage design realizes a closed-loop control of "detection-response", ensuring that the leakage event can be quickly isolated and avoiding safety hazards.

[0066] More preferably, the first gas switch (GS001) is connected to the combustion-supporting medium total valve (YV001) through a first solenoid-operated valve (SOV001); the second gas switch (GS002) is connected to the fuel total valve (YV002) through a second solenoid-operated valve (SOV002); and the third gas switch (GS003) is connected to the combustion-inhibiting medium total valve (YV003) through a third solenoid-operated valve (SOV003).

[0067] Specifically, the gas switch (GS) is a safety relay module that performs logical operations and power amplification on the leakage signal, and receives external interlocking signals (such as system pressure and device status). When the preset valve-closing conditions are met, the gas switch (GS) outputs a high-power drive signal to the solenoid-operated valve (SOV), which controls the total valve (YV) to execute a quick cut-off. This design realizes signal isolation, multi-condition interlocking, and fault safety mechanism, avoiding the systemic risks caused by the failure of a single instrument.

[0068] Preferably, a current-to-pressure converter (I / P) is connected to the flow valve (FV) to achieve accurate conversion of electrical signals to pneumatic signals, thereby controlling the opening of the flow valve (FV). In this technical solution, the current-to-pressure converter (I / P) receives electrical signals (such as 4-20 mA current signals) and converts them into standard pneumatic signals (such as 3-15 psi). The pneumatic signal acts on the diaphragm of the flow valve (FV) to drive the flow valve (FV) to adjust the gas flow. The key role of this connection is to achieve high-precision dynamic control of the flow: for example, when the system load changes, the current-to-pressure converter (I / P) can quickly respond to changes in electrical signals, fine-tune the opening of the flow valve (FV), and ensure that the gas flow is stable at the set value. This not only improves the regulation accuracy of the system, but also reduces energy consumption, which is a key link in optimizing flow control in this solution.

[0069] The overall control logic in the above embodiment is GL monitoring leakage → signal output to GS → GS triggering YV to close (executed through SOV), while I / P independently adjusts FV to maintain stable flow. These associated designs solve the problems of slow response and low accuracy in the prior art, and through signal interaction between instruments (such as electrical-to-pneumatic conversion and electromagnetic drive), the safety, efficiency and automation level of the system are improved.

[0070] In summary, the present application can solve the technical problems that the flame direction is relatively fixed and cannot meet the demand of flexible adjustment of the flame direction; can solve the technical problems that temporary shutdown of the hot working equipment such as the kiln is required when adjusting the flame direction, even the equipment needs to be modified, which consumes time and effort and has huge energy consumption; can solve the problem that repeated debugging is required to achieve process requirements when adjusting the flame direction, thereby causing energy loss and equipment wear and tear. Compared with the prior art, the present application has higher operation flexibility and working efficiency, and lower energy consumption and equipment wear and tear.

[0071] The above is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A burner nozzle with adjustable flame direction, comprising a burner nozzle housing (1), wherein a spray gun assembly (2) is disposed within the burner nozzle housing (1), characterized in that: The spray gun assembly (2) is provided with a combustion medium nozzle (21) and a fuel nozzle (22). There are two or more combustion medium nozzles (21) and they are distributed in a circle with the same angle as the fuel nozzle (22). Each combustion medium nozzle (21) is independently connected to the output end of a combustion medium inlet pipe (3). The fuel nozzle (22) is connected to the output end of a fuel inlet pipe (4). Each combustion medium inlet pipe (3) and the fuel inlet pipe (4) are independently connected to a flow sensor and a regulating valve, so as to control the flame direction by adjusting the flow of different combustion medium inlet pipes (3) and fuel inlet pipes (4).

2. The adjustable flame direction burner according to claim 1, characterized in that: The number of combustion medium nozzles (21) is 8, and they are distributed in a circle with the fuel nozzle (22) at 45° intervals.

3. The adjustable flame direction burner according to claim 1 or 2, characterized in that: The spray gun assembly (2) is also provided with an annular air channel (23), and the air outlet (231) of the annular air channel (23) surrounds the outside of the combustion medium nozzle (21).

4. A combustion system with adjustable flame direction, comprising the burner nozzle as described in any one of claims 1 to 3, characterized in that: Each of the aforementioned combustion medium inlet pipes (3) is independently connected to a combustion medium inlet flow valve (FV001A / FV001B~FV001N), and each of the aforementioned combustion medium inlet flow valves (FV001A / FV001B~FV001N) is independently connected to a combustion medium inlet flow transmitter (FT002A / FT002B~FT002N) downstream. Each of the aforementioned combustion medium inlet flow transmitters (FT002A / FT002B~FT002N) is independently connected to a combustion medium inlet flow indicator controller (FIC002A / FIC002B~FIC002N). The combustion medium inlet flow indicator controller (FIC002A / FIC002B~FIC002N) is used to transmit the flow information collected by the combustion medium inlet flow transmitter (FT002A / FT002B~FT002N) to the flame control system. The flame control system adjusts the combustion medium inlet flow valve (FV001A / FV001B~FV001N) according to the flow information transmitted by the combustion medium inlet flow indicator controller (FIC002A / FIC002B~FIC002N) to achieve control of the flame direction.

5. The combustion system with adjustable flame direction according to claim 4, characterized in that: The fuel inlet pipe (4) is connected to a fuel inlet flow valve (FV002), and a fuel inlet flow transmitter (FT003) is connected downstream of the fuel inlet flow valve (FV002). The fuel inlet flow transmitter (FT003) is connected to a fuel inlet flow indicator controller (FIC003). The fuel inlet flow indicator controller (FIC003) is used to transmit the flow information collected by the fuel inlet flow transmitter (FT003) to the flame control system. The flame control system adjusts the flow based on the flow information transmitted by the combustion medium inlet flow indicator controller (FIC002A / FIC002B~FIC002N) and the flow information transmitted by the fuel inlet flow indicator controller (FIC003) to achieve control of the flame direction.

6. The combustion system with adjustable flame direction according to claim 5, characterized in that: The input ends of all the combustion medium inlet pipes (3) are connected to the same combustion medium main pipe, which is equipped with a combustion medium main valve (YV001). The input end of the fuel inlet pipe (4) is connected to the fuel delivery pipe, and the fuel delivery pipe is equipped with a fuel master valve (YV002). The combustion system is also equipped with a flame-retardant medium delivery pipe, which is equipped with a flame-retardant medium main valve (YV003). The output end of the flame-retardant medium delivery pipe is connected to the fuel delivery pipe and is located downstream of the fuel main valve (YV002). The combustion medium main valve (YV001) and the fuel main valve (YV002) are both fault-closed valves, while the flame-retardant medium main valve (YV003) is a fault-opening valve.

7. The combustion system with adjustable flame direction according to claim 6, characterized in that: The combustion medium main pipe is connected to a combustion medium total flow transmitter (FT001) for collecting the flow rate within the combustion medium main pipe. The combustion medium total flow transmitter (FT001) is located downstream of the combustion medium main valve (YV001). The combustion medium total flow transmitter (FT001) is connected to a combustion medium total flow indicator controller (FIC001). The combustion medium total flow indicator controller (FIC001) is used to transmit the flow information collected by the combustion medium total flow transmitter (FT001) to the flame control system.

8. The combustion system with adjustable flame direction according to claim 7, characterized in that: The combustion medium main pipe is connected to a combustion medium total pressure transmitter (PT001) for collecting the pressure inside the combustion medium main pipe. The combustion medium total pressure transmitter (PT001) is located downstream of the combustion medium total flow transmitter (FT001). The combustion medium total pressure transmitter (PT001) is connected to a combustion medium total pressure indicator (PI001). The combustion medium total pressure indicator (PI001) is used to transmit the pressure information collected by the combustion medium total pressure transmitter (PT001) to the flame control system.

9. The combustion system with adjustable flame direction according to claim 8, characterized in that: The fuel inlet pipe (4) is connected to a fuel inlet pressure transmitter (PT002) for collecting the pressure inside the fuel inlet pipe (4). The fuel inlet pressure transmitter (PT002) is located downstream of the fuel inlet flow transmitter (FT003). The fuel inlet pressure transmitter (PT002) is connected to a fuel inlet pressure indicator (PI002). The fuel inlet pressure indicator (PI002) is used to transmit the pressure information collected by the fuel inlet pressure transmitter (PT002) to the flame control system.

10. The combustion system with adjustable flame direction according to claim 9, characterized in that: The combustion medium total pressure indicator (PI001) and the fuel inlet pressure indicator (PI002) are connected to the same differential pressure indicator controller (PDIC001). The differential pressure indicator controller (PDIC001) calculates the pipeline differential pressure based on the pressure information transmitted by the combustion medium total pressure indicator (PI001) and the fuel inlet pressure indicator (PI002) and transmits the pipeline differential pressure to the flame control system. The flame control system monitors the pipeline differential pressure. When the pipeline differential pressure exceeds a preset range, the flame control system controls the combustion medium main valve (YV001) and the fuel main valve (YV002) to close and controls the flame retardant medium main valve (YV003) to open.

Images