A wind-resistant, high-precision, power-gradually variable burner assembly and its operating method

Abstract

The present invention relates to a wind-resistant, high-precision, power-gradually variable burner group and its operating method, comprising a concave-convex conical burner group, the concave-convex conical burner group being composed of a plurality of regularly arranged rows of concave-convex conical burners, the ends of which are all connected to an air supply pipe. This structure divides the air supply pipe from the inside to the outside into a plurality of concentric pipes, each layer of pipes being connected to the ends of a circle of concave-convex conical burners, an air intake pipe being provided in the air supply pipe, a plurality of air intake ports being provided on the air intake pipe, each air intake port being connected to a layer of pipes, a solenoid valve being provided in front of the air intake port, a self-tuning sensor being provided on the combustion chamber where the concave-convex conical burner group is located, the self-tuning sensor being connected to a control system, the solenoid valve being controlled by the control system, and the control system controlling the air intake of the air supply pipe via a proportional control valve. The present invention has the characteristics of easy ignition, easy temperature adjustment, low emissions, and low system temperature accuracy.

Description

Technical Field

[0001] The present invention relates to a wind-resistant, high-precision, power-gradually variable burner assembly and its operating method, belonging to the technical field of combustion equipment. The burner assembly can be widely used in industries such as drying, chemical reactions, and food processing that require high-precision hot air and a wide power adjustment range. Background Art

[0002] Currently, there are several challenges in the burner industry.

[0003] First, burner power selection. To standardize and reduce costs, burner manufacturers produce fixed models with a few power ratings. However, industrial thermal engineers often struggle to select the right burner model. To be on the safe side, they often choose a larger burner, which results in a lack of flexible control over the combustion system.

[0004] Second, looking at the use of heat in industry, the most common feedback received from front-line workers is that the temperature cannot be controlled.

[0005] Third, there is the commonly reported problem of difficulty in igniting high-power burners.

[0006] The above three phenomena have caused great trouble to equipment integrators. The fundamental reason for the above problems is that the existing combustion technology has a small power range and cannot achieve precise power regulation under the premise of a large power range. Summary of the Invention

[0007] The purpose of the present invention is to overcome the above-mentioned shortcomings and provide a wind-resistant, high-precision, power-gradual-change burner group and its operating method with adjustable laser power, high processing precision and better surface treatment effect.

[0008] The purpose of the present invention is to solve the problems of difficult ignition, limited power range and low accuracy of system temperature of existing burners.

[0009] The object of the present invention is achieved like this:

[0010] A wind-resistant, high-precision, power-gradually variable burner group comprises a concave-convex conical burner group, which is composed of multiple rows of concave-convex conical burners arranged in a regular manner. The burner surface of the burner is designed with through holes of a concave-convex structure, and the ends of the multiple rows of concave-convex conical burners are connected to the air supply pipe. This structure divides the air supply pipe into multiple concentric pipes from the inside to the outside, and each layer of pipes is connected to the end of a circle of concave-convex conical burners. An air intake pipe is arranged in the air supply pipe, and multiple air intake ports are opened on the air intake pipe. Each air intake port is respectively connected to a layer of pipes. An electromagnetic valve is provided on the front side of the air intake port, and each layer of pipes is opened and closed separately by the electromagnetic valve. A self-tuning sensor is installed on the combustion chamber where the concave-convex conical burner group is located to detect the temperature in the combustion chamber. The self-tuning sensor is connected to a control system. The electromagnetic valve is controlled by the control system. The control system controls the air intake amount of the air supply pipe through a proportional control valve.

[0011] The operation method of this wind-resistant high-precision power gradient burner group is:

[0012] Ignition: This system uses automatic ignition to ignite the central flame, which is the lowest power of the system;

[0013] Increase power: the remaining burners will ignite and open automatically due to the fluidity of the gas;

[0014] Full power opening: The control system will adjust the angle of the proportional control valve to the maximum and open all the solenoid valves in the pipe at the same time, corresponding to the maximum power of the system;

[0015] System instability: When the auto-tuning sensor detects a positive PV-SV ratio that increases over time for more than one minute, the auto-tuning system activates, increasing the solenoid valve's opening ratio. When the auto-tuning sensor detects a negative PV-SV ratio that increases over time for more than one minute, the auto-tuning system activates, decreasing the solenoid valve's opening ratio. In all other cases, the auto-tuning system shuts down. The auto-tuning system activates layer by layer, and after ten minutes, the PV-SV difference is continuously observed for judgment.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention provides a wind-resistant, high-precision, power-varying burner assembly and its operating method, featuring easy ignition, easy temperature adjustment, low emissions, and low system temperature accuracy. The combustion system offers sensitive control, convenient temperature control, and simple ignition. The combustion power range is wide, enabling precise power regulation within this wide power range. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural schematic diagram of a wind-resistant, high-precision, power-gradually variable burner group according to the present invention.

[0019] Figure 2 for Figure 1 Schematic diagram of the medium concave-convex cone burner group.

[0020] Figure 3 Schematic diagram of the concave-convex cone burner, gas supply pipe, and self-tuning sensor.

[0021] Figure 4 for Figure 3 side view.

[0022] Figure 5 Schematic diagram of a concave-convex cone burner.

[0023] Figure 6 This is a schematic diagram of a disc-shaped gas supply pipe.

[0024] Figure 7 This is a schematic diagram of the gas supply pipe being a square disc type.

[0025] Among them: concave-convex conical burner group 1, concave-convex conical burner 2, through hole 3, air supply pipe 4, solenoid valve 5, self-tuning sensor 6, control system 7. Implementation Method

[0026] See also Figures 1 to 7 The present invention relates to a wind-resistant, high-precision, power-gradually variable burner group, comprising a concave-convex conical burner group 1, wherein the concave-convex conical burner group 1 is composed of multiple rows of concave-convex conical burners 2 arranged regularly, such as Figure 3 、 4 As shown, the shape of each concave-convex conical burner 2 is conical, and the distance between two adjacent burners of the burner is limited. The maximum distance is limited to 20 cm, and the minimum distance is limited to the maximum diameter of the burner conical structure. Figure 5 The burner surface of the burner is designed with multiple through holes 3 with a tight and regular concave-convex structure. The through holes 3 can be round holes, square holes or other regular shapes. The opening direction of the through holes 3 is oblique, and is set obliquely towards the flame outlet. The through holes 3 are evenly arranged and arranged in a spiral ascending pattern. The through holes 3 structure has the characteristics of large number, regular arrangement, and unevenness.

[0027] The ends of the multiple rows of concave-convex conical burners 2 are connected to the gas supply pipe 4. The cross section of the gas supply pipe 4 is as follows: Figure 6 、 7As shown, the shape of each pipe can be designed based on the required shape of the air duct, and can be disc-shaped or square-shaped. This structure divides the air supply duct 4 from the inside out into multiple concentric pipes. Each layer of pipes connects to the end of a circle of concave-convex conical burners 2, thereby supplying air to the concave-convex conical burners 2. An air inlet pipe is provided within the air supply duct 4, with multiple air inlets formed on the pipe. Each inlet is connected to a layer of pipes. Solenoid valves 5 are installed in front of the air inlets to open and close each layer of pipes individually. When all solenoid valves 5 are fully open, the combustion system achieves maximum power.

[0028] The combustion chamber where the concave-convex cone burner group 1 is located is equipped with a self-tuning sensor 6, which can detect the temperature in the combustion chamber. The two key temperatures in the combustion chamber are SV and PV. "PV" indicates the temperature of the current environment in the combustion chamber detected by the self-tuning sensor 6, and "SV" indicates the temperature value set by the system.

[0029] The self-tuning sensor 6 is connected to the control system 7 and becomes the detection end of the self-tuning system in the control system 7. The fuel radius is determined according to the difference between PV and SV. The solenoid valve 5 is controlled by the control system 7. The control system 7 controls the air intake of the air supply pipe 4 through the proportional control valve.

[0030] The operation method of this wind-resistant high-precision power gradient burner group is:

[0031] Ignition: This system uses automatic ignition to ignite the center flame, which is the lowest power of the system. This system is easy to ignite because the air and gas conditions are already set to the optimal state before ignition.

[0032] Increase power: The remaining burners will ignite and open automatically due to the fluidity of the gas.

[0033] Full power opening: The control system will adjust the angle of the proportional control valve to the maximum and open all the solenoid valves in the pipe at the same time, corresponding to the maximum power of the system.

[0034] When the self-tuning sensor detects that the system is in an unstable state for a long time, the self-tuning system of the system starts. The startup of the self-tuning system is as follows:

[0035] Where b is the opening ratio of the solenoid valve.

[0036] The auto-tuning system starts up layer by layer. After ten minutes, continue observing the difference between PV and SV, and then continue to make judgments until PV and SV are no longer unstable as shown in the table above. By doing this, the maximum power divided by the minimum power within the system's power range can be increased to over 1000, significantly improving temperature control accuracy and temperature tracking.

[0037] The working principle of this wind-resistant high-precision power gradient burner group is:

[0038] i. After the concave-convex cone burner assembly is ignited, the flame becomes the ignition flame, burning within the burner's conical tube. Due to the surrounding and bottom structures of the conical burner, the flame is difficult to extinguish, which also reduces the power limit of the combustion system to a very low level. Because the flame is very stable at this point, it can be considered a working flame, and this is the minimum power of a single burner. When the flame is adjusted to maximum power, the flame burns outside the cone. At this point, the flame becomes the working flame, and this is the maximum power of a single burner. The maximum and minimum powers are adjusted gradually.

[0039] This burner group can greatly improve the wind resistance. The specific working principle is:

[0040] The distance L between the centers of the two burners satisfies the formula:

[0041] 10*D*10 / P*R <L<50*D*10 / P*R

[0042] Where D is the diameter of the gas pipeline where the combustion takes place;

[0043] P is the atmospheric pressure value, for example, normal atmospheric pressure is 1;

[0044] R is the air-gas ratio when the fuel is completely burned.

[0045] ii. The presence of the concave-convex cone burner group can amplify the power range. Through the circular or square disc-shaped gas supply pipe, the system power can be increased a hundredfold while maintaining the minimum power unchanged. For example, when the heat demand is relatively low, only the innermost flame of the combustion group is on. When the heat demand is relatively large, the combustion group can be fully opened. It is only necessary to open the pipe at the corresponding position on the gas supply pipe and control the corresponding solenoid valve through the control system to open the burner in the pipeline. You can choose to open only part or all of it. Through this mechanism, the heat demand of the process can always meet the production needs, avoid insufficient or excessive power, and achieve high-precision and gradual power control.

[0046] iii. The self-tuning sensor and control system optimizes the two actions described in steps i and ii. This is achieved by obtaining the system's PV and SV, taking their difference, and determining the combustion group opening ratio and individual burner power. This is achieved by adjusting the solenoid valve opening ratio (b) and the control system's proportional control valve opening (a).

[0047] Power adjustment is gradual rather than step-by-step. This structure significantly improves fuel utilization, thanks to the unique design of the concave-convex conical burner group.

Claims

1. A wind-resistant, high-precision, power-gradually variable burner assembly, characterized by: It includes a concave-convex conical burner group, which is composed of multiple rows of concave-convex conical burners arranged in a regular manner. The burner surface of the burner is designed with a through hole with a concave-convex structure. The ends of the multiple rows of concave-convex conical burners are connected to the air supply pipe. This structure divides the air supply pipe into multiple concentric pipes from the inside to the outside. Each layer of pipes is connected to the end of a circle of concave-convex conical burners. An air intake pipe is arranged in the air supply pipe, and multiple air intakes are opened on the air intake pipe. Each air intake is connected to a layer of pipe respectively. An electromagnetic valve is arranged on the front side of the air intake, and each layer of pipes is opened and closed separately by the electromagnetic valve. A self-tuning sensor is installed on the combustion chamber where the concave-convex conical burner group is located to detect the temperature in the combustion chamber. The self-tuning sensor is connected to the control system. The solenoid valve is controlled by the control system. The control system controls the air intake volume of the air supply pipe through a proportional control valve.

2. The wind-resistant, high-precision, power-gradually variable burner assembly according to claim 1, characterized in that: The air supply pipe is designed to be disc-shaped or square-shaped.

3. The wind-resistant, high-precision, power-gradually variable burner assembly according to claim 1, characterized in that: The maximum distance between two adjacent burners of the burner is limited to 20 cm, and the minimum distance is limited to the maximum diameter of the burner cone structure.

4. The wind-resistant, high-precision, power-gradually variable burner assembly according to claim 1, characterized in that: Each burner has a conical shape.

5. The wind-resistant, high-precision, power-gradually variable burner assembly according to claim 1, characterized in that: The opening directions of the through holes are all oblique and are arranged obliquely towards the end of the flame outlet. The through holes are evenly arranged and arranged in a spiral ascending pattern.

6. The method for operating a wind-resistant, high-precision, power-gradually variable burner assembly according to claim 1, characterized in that: The specific operation method is: Ignition: This system uses automatic ignition to ignite the central flame, which is the lowest power of the system; Increase power: the remaining burners will ignite and open automatically due to the fluidity of the gas; Full power opening: The control system will adjust the angle of the proportional control valve to the maximum and open all the solenoid valves in the pipe at the same time, corresponding to the maximum power of the system; System instability: When the self-tuning sensor detects that the PV-SV is positive and increases with time for more than 1 minute, the self-tuning system starts and the opening ratio of the solenoid valve increases; when the self-tuning sensor detects that the PV-SV is negative and the absolute value increases with time for more than 1 minute, the self-tuning system starts and the opening ratio of the solenoid valve decreases; in other cases, the self-tuning system is shut down and starts layer by layer. Ten minutes after starting, continue to observe the difference between PV and SV for judgment.

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