Writer： admin Time：2021-04-22 00:00 Browse：℃
Generally, we have a common boiler burner gas boiler burners, boilers, oil burners, biomass boiler burner, then the low-NOx combustion system, a detailed breakdown of the top five machine
Five low nitrogen burner system detailed breakdown
Five low nitrogen burner detailed exploded burner system is divided into five systems: air supply system, ignition system, monitoring system, fuel system, electric control system. Air supply system: air supply system that functions into a certain wind speed and amount of air to the combustion chamber, its main components are: a housing, fan motors, fan impeller, air guns fire tube, damper controller, damper baffle, diffusion plate. A housing: a major component of the mounting bracket and the fresh air inlet passage of the components of a combustor; fan motor: The main power the fan wheel and the operation of the high pressure pump, there are some burners are equipped with a separate motor to provide pump power, the motor is generally is 2800 rpm; impeller fan: produced by high-speed rotation pressure sufficient to overcome the resistance of the furnace and the stack resistance, and sufficient air blown into the combustion chamber in order to meet the needs of the combustion; air gun fire tube: play a guiding and stabilization air stream apply pressure; damper controller: a drive means, the rotation of the damper is controlled by a mechanical linkage baffle; tailgate damper: the main role is to regulate the air intake passage to control the size of the size of the wind inlet; diffuser plate: known as flame-disc, a special structure which can generate a rotary airflow helps to mix the air and fuel, as well as regulation of the amount of secondary air. Burner Ignition System: The function of the ignition system ignites the mixture of air and fuel, its main components are: the ignition transformer, the ignition electrode, electrically connecting the high-pressure fire. Ignition transformer: points electronic (inductive) and mechanical two, a conversion element for generating high voltage output, the output voltage is typically: 2 × 4K V, 2 × 5KV, 2 × 6KV, 2 × 7KV, the output current is generally 15 ~ 30mA; firing electrode: high voltage by the arc discharge is converted into the form of light and heat energy to ignite the fuel, and using a nichrome wire of high temperature capability 1500; fire electric high-voltage cable: its role is to transmit electricity. It can withstand 1.5 million volts. Burner monitoring system: system monitoring functions is to ensure safe operation of the burner, its main components are flame detectors, pressure monitor, an external monitor temperature or the like. Flame detectors: its main role is to monitor the condition of the flame is formed, and generates a signal reporting programmer. There are three main flame detector: photosensitive resistance, ultraviolet ray UV and ionizing electrode electric eye; photoresistor: used for light oil, a heavy oil burner, and functional working principle is: and photosensitive resistance connected to a flame relay with three contacts, resistance varies with the receiver unit of the brightness of the light, the brighter the light, the lower the resistance, the resistance applied across the photosensitive constant voltage, the current in the circuit when the higher, when the current reaches a certain value, the flame relay is activated, so that the work to continue down the burner. When the photoresistor not feel enough light, flame relay does not work, the burner will stop working. Photoresistor not apply to gas burner ionization electrode: used for the gas burner. Power to the ionizing electrode programmer, if there is no flame, the electrode power supply will stop if a flame, high-temperature gas by its own ionization, ion current flows between the electrodes, and the combustion flame head, the ion current is rectified to direct current, and reaches the flame relay this to work through the burner housing to ground, to ensure smooth working order after the burner. If the ground electrode ionization phenomenon occurs, then the current generated is an alternating current, rather than the flame relay will not operate, control box is locked. Further, unstable flame ionization region will cause the burner flame there is disconnection, may be inappropriate because the air ratio of gas, can be solved by adjusting the amount of air or gas volume, it may be unevenly distributed gas combustion air head, It can be solved by adjusting the position of the burner head. UV ultraviolet electric eye: generally used for oil and gas Burner, the electric eye only sense the flame ultraviolet (spectral range 190 to 270 nanometers), UV tube does not flicker on the furnace refractories sunlight or ordinary rays furnace respond to the glow substance, UV tube life of about 10,000 hours (about two years) does not exceed 50 ℃ at ambient temperature, the ambient temperature have a great effect on its lifetime is too high. If it receives a sufficient amount of ultraviolet light, it can generate a current, and after appropriate amplification, so that the flame relay is closed. If the UV tubes run out of power, even if the absence of ultraviolet light, it still exhibits ultraviolet received, in order to overcome this drawback, before each open, at its end programmer will add a suitable voltage, so that even if power consumption done, it will only signal that there is no flame, so that the control box will immediately stop working. UV electric eye to detect the effect, after it is withdrawn from the ignition situ at least one minute, UV electric eye is drawn, it can not detect flame emitted ultraviolet rays, associated relay opens, the burner stops. Even a few little oil will block the ultraviolet into the passage leading to the interior of the photocell sensing elements not receiving a sufficient amount of ultraviolet rays can not work. Thus photocells must be thoroughly cleaned. UV tubes feel sunlight or ordinary lamps light, the point may be a spark between the two electrodes or flame ignition transformer common to test its sensitivity. To ensure the normal operation of the burner, it must be stable current, it can not be less than the current required programmer. The current can be detected microammeter. Burner pressure monitor: usually used in the gas burner, the main high-pressure gas, low pressure monitoring, pressure monitoring, and, if the burner for steam boilers, and steam pressure monitoring. Burner fuel system: the system is to ensure that the function of the fuel required for the fuel burner. The fuel oil burner system are: tubing and fittings, pumps, solenoid valves, nozzles, heavy oil preheater; main gas burner with a filter, pressure regulators, solenoid valve, ignition solenoid valve.
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