Self-adaptive energy-saving ultralow-nitrogen burner

Abstract

The utility model discloses a self-adaptive energy-saving ultra-low-nitrogen burner which comprises a low-nitrogen burner, a temperature measuring component and a positioning piece. The low-nitrogen combustor comprises a combustor body, a mounting flange, a combustion head, a PLC (Programmable Logic Controller) and an air door actuator; the mounting flange is connected between the combustor body and the combustion head, and the temperature measuring component is arranged on the mounting flange, extends towards the direction of the combustion head and is fixed on the surface of the combustion head through the positioning piece; the PLC and the air door actuator are arranged at the end, away from the combustion head, of the combustor body. The temperature measuring component is used for detecting the temperature data of the flame root or the inner flame of the combustion head; the flame root or inner flame temperature is compared with the preset temperature through PLC programming to monitor the air inlet amount, then the flame temperature is adjusted, the reaction is fast, on one hand, the burner can operate stably, and energy is saved; on one hand, the pollutant discharge control effect is obvious, and the problems of detection result lag, long-term use failure, high cost and the like caused by zirconia detection can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of ultra-low nitrogen burners, in particular to an adaptive energy-saving ultra-low nitrogen burner. Background Art

[0002] During the operation of the low-nitrogen burner, pollutant emissions will fluctuate with the changes in air / gas volume and temperature, such as gas pressure, flow rate, water content, ambient temperature, humidity, and local wind speed and direction, causing the ratio of air to gas to fluctuate, thus causing changes in flame temperature after combustion. On the one hand, harmful emissions such as NOx and CO cannot be maintained in the best state, and the commissioning personnel need to adjust the air-fuel ratio again according to the current environment and gas supply conditions at intervals;

[0003] On the other hand, some plants use self-produced gas, and the gas supply pressure is very unstable. When the air-fuel ratio deviates from the reasonable ratio, the combustion flame will be unstable. If the air-fuel ratio is too high, the burner will shut down. Frequent shutdowns will affect the temperature fluctuation of the heating medium, thereby affecting production operations.

[0004] If the air-fuel ratio is too low, the combustion head will be damaged due to excessive flame temperature, which will affect the service life of the burner.

[0005] To optimize pollutant emissions, the usual method is to use a more expensive zirconium oxide detector to detect the oxygen content in the emissions and then adjust the air supply. However, since zirconium oxide is easily polluted by CO and other pollutants in the emissions after long-term use, it usually loses its effectiveness after 2-3 years, and the emission optimization function will also fail.

[0006] Therefore, it is necessary to propose an adaptive energy-saving ultra-low nitrogen burner to solve the above problems. Utility Model Content

[0007] The utility model aims to solve the above-mentioned shortcomings in the prior art and proposes an adaptive energy-saving ultra-low nitrogen burner.

[0008] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0009] An adaptive energy-saving ultra-low nitrogen burner is designed, characterized in that: the ultra-low nitrogen burner includes a low nitrogen burner, a temperature measuring component and a positioning component; the low nitrogen burner includes a burner body, a mounting flange, a combustion head, a PLC and a damper actuator; the mounting flange is connected between the burner body and the combustion head, the temperature measuring component is arranged on the mounting flange and extends toward the combustion head, and is fixed to the surface of the combustion head through the positioning component; the PLC and the damper actuator are arranged on the burner body at one end away from the combustion head;

[0010] The temperature measuring component is used to detect the temperature data of the flame root or inner flame of the combustion head;

[0011] The PLC is used to obtain the flame root or inner flame temperature data, and adjust the air volume by adjusting the opening of the damper actuator according to the flame root or inner flame temperature data.

[0012] Furthermore, the PLC is used to:

[0013] Acquiring the flame root or inner flame temperature data;

[0014] Determining whether the flame root or inner flame temperature data is higher than a preset temperature threshold;

[0015] If the flame root or inner flame temperature data is higher than a preset temperature threshold, increasing the opening of the damper actuator to increase the air volume and reduce the flame root or inner flame temperature;

[0016] If the flame root or inner flame temperature data is lower than a preset temperature threshold, the opening of the damper actuator is reduced to reduce the air volume and increase the flame root or inner flame temperature.

[0017] Furthermore, the adaptive energy-saving ultra-low nitrogen burner also includes a gas regulating valve arranged on the burner body.

[0018] The design scheme proposed by the utility model has the following beneficial effects during application:

[0019] 1. The adaptive energy-saving ultra-low nitrogen burner provided by the utility model is based on the principle of thermal NOx generation. It uses PLC programming to compare the flame root or inner flame temperature with the preset temperature to monitor the air intake volume, and then adjust the flame temperature. It has a fast response, which can make the burner run stably and save energy.

[0020] 2. The effect of controlling pollutant emissions is obvious, which can avoid the problems of delayed test results, long-term failure, high cost, etc. caused by the use of zirconium oxide detection; on the other hand, it can reduce the impact of production safety problems caused by burner flameout or high-temperature combustion head damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of the adaptive energy-saving ultra-low nitrogen burner of the utility model;

[0022] Figure 2 This is a schematic diagram of the application of the adaptive energy-saving ultra-low nitrogen burner of the utility model.

[0023] In the figure: 1. Low nitrogen burner; 2. Temperature measuring component; 3. Positioning part; 11. Burner body; 12. Mounting flange; 13. Combustion head; 14. PLC; 15. Gas regulating valve; 16. Air damper actuator. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0025] See also Figure 1-Figure 2 The embodiment of the utility model provides an adaptive energy-saving ultra-low nitrogen burner, including: a low nitrogen burner 1, a temperature measuring component 2 and a positioning component 3.

[0026] The low nitrogen burner includes a burner body 11, a mounting flange 12, a combustion head 13, a PLC 14, a gas regulating valve 15 and a damper actuator 16. The mounting flange 12 is connected between the burner body 11 and the combustion head 13, and is used to install the low nitrogen burner 1 on the boiler.

[0027] In this embodiment, the temperature measuring component 2 is arranged on the mounting flange 12 and extends toward the combustion head 13, and is inserted into the furnace, fixed to the surface of the combustion head 13 through the positioning member 3, and is arranged on the upper part of the flame to detect the flame root or inner flame temperature.

[0028] A PLC (Programmable Logic Controller) 14 and a damper actuator 16 are arranged on the burner body 11 at one end away from the combustion head 13. The PLC 14 is programmed to compare the temperature of the flame root or the inner flame with the preset temperature, and can be combined with a control screen or an instrument for user convenience. The PLC 14 detects the change in the temperature of the flame root or the inner flame through the temperature measuring component 2 and outputs a signal to accurately adjust the opening of the damper actuator 16 to adjust the air volume. The part of the temperature measuring component 2 that contacts the flame is made of high-temperature resistant metal. A gas regulating valve 15 is also arranged on the burner body 11 for adjusting the intake amount of the gas.

[0029] The working principle of the adaptive energy-saving ultra-low nitrogen burner of the utility model is as follows:

[0030] The temperature measuring component 2 detects the flame root or inner flame temperature data of the combustion head 13, and the PLC 14 obtains the flame root or inner flame temperature data, and adjusts the opening of the damper actuator 16 according to the flame root or inner flame temperature data to adjust the air volume.

[0031] Specifically, the air volume is adjusted by adjusting the opening of the damper actuator 16 according to the flame root or inner flame temperature data, including the following steps: determining whether the flame root or inner flame temperature data is higher than a preset temperature threshold; if the flame root or inner flame temperature data is higher than the preset temperature threshold, increasing the opening of the damper actuator 16 to increase the air volume and reduce the flame root or inner flame temperature; if the flame root or inner flame temperature data is lower than the preset temperature threshold, reducing the opening of the damper actuator 16 to reduce the air volume and increase the flame root or inner flame temperature, thereby making the flame root or inner flame temperature close to the preset temperature threshold. The flame root or inner flame temperature is in direct proportion to the maximum temperature of the outer flame. Controlling the flame root or inner flame temperature can also control the large-scale generation of thermal NOx, thereby achieving an ultra-low nitrogen emission effect.

[0032] In summary, the adaptive energy-saving ultra-low nitrogen burner disclosed in the embodiment of the utility model has achieved the following technical effects by adopting the technical solution as described above. The burner of the utility model has a compact structure; the burner of the utility model is based on the thermal NOx generation principle, and uses PLC programming to compare the flame root or inner flame with the preset temperature to monitor the air intake; the burner of the utility model, the temperature measuring component 2 detects the change of the flame root or inner flame temperature, and reacts quickly, which is conducive to stabilizing to a reasonable air-fuel ratio, stabilizing combustion, and controlling pollutant emissions. The effect is obvious and the cost is low.

[0033] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. Adaptive energy-saving ultra-low nitrogen burner, characterized by: The ultra-low nitrogen burner comprises a low nitrogen burner (1), a temperature measuring component (2) and a positioning component (3); the low nitrogen burner comprises a burner body (11), a mounting flange (12), a combustion head (13), a PLC (14) and a damper actuator (16); the mounting flange (12) is connected between the burner body (11) and the combustion head (13); the temperature measuring component (2) is arranged on the mounting flange (12) and extends toward the combustion head (13), and is fixed to the surface of the combustion head (13) via the positioning component (3); the PLC (14) and the damper actuator (16) are arranged on an end of the burner body (11) away from the combustion head (13).

2. The adaptive energy-saving ultra-low nitrogen burner according to claim 1 is characterized in that: The burner body (11) is provided with a gas regulating valve (15).

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