Technical performance
● single stage fire, two-stage fire and two-stage fire progressive / proportional adjustment
● be able to adapt to any type of combustion chamber.
● air and gas are mixed in the combustion head.
● the best combustion parameters can be obtained by adjusting the combustion air and combustion head.
● the mixing device can be directly removed without removing the burner from the boiler, so as to facilitate maintenance.
● servo motor is used to regulate the air flow of the first and second sections, and when the burner stops running, the damper is closed to reduce the heat loss in the furnace.
● a valve sealing control device can be added to the valve group.
● connect and fix the boiler with a flange and an insulating sealing ring; Equipped with a 4-hole and 7-hole coupling.
● blast pipes larger than the standard length can be provided as required.
Main classification
1. Heavy oil burner, gas burner and dual fuel burner (light oil / gas or heavy oil / gas).
2. According to the operation and operation mode, orette burner is divided into one-stage, two-stage, progressive two-stage and progressive two-stage with proportional regulator (the latter implements proportional regulation operation)
3. Industrial burner series: all high-power burners are designed for special industrial applications.
4. According to the classification of combustion technology to reduce NOx: burner is an important equipment on industrial oil-fired boiler and gas-fired boiler. It ensures the stable ignition and combustion of fuel and the complete combustion of fuel. Therefore, to inhibit the generation of NOx, we must start with burner. According to the combustion technology to reduce NOx, low NOx burners are roughly divided into the following categories:
Stage burner
The stage burner designed according to the principle of staged combustion enables the staged mixed combustion of fuel and air. Because the combustion deviates from the theoretical equivalence ratio, it can reduce the generation of NOx.
Self recirculation burner
One is to use the pressure head of combustion supporting air to suck back part of the combustion flue gas, enter the burner and burn with air. Due to flue gas recirculation, the heat capacity of combustion flue gas is large, the combustion temperature is reduced and NOx is reduced.
Another self recirculation burner is to recycle part of the flue gas directly in the burner and add it to the combustion process. This burner has the dual effects of inhibiting nitrogen oxide and saving energy.
Dense dilute burner
The principle is to make part of the fuel burn too rich and the other part burn too light, but the air volume remains unchanged as a whole. Since both parts burn under the deviation of chemical equivalence ratio, NOx is very low. This kind of combustion is also called deviation combustion or non chemical equivalence combustion.
Split flame burner
The principle is to divide a flame into several small flames. Due to the large heat dissipation area of the small flame and the low flame temperature, the "thermal reaction no" decreases. In addition, the residence time of no and no in the flame is obviously shortened.
Mixed promotion burner
The residence time of flue gas in the high temperature zone is one of the main factors affecting the generation of NOx. Improving the mixing of combustion and air can reduce the thickness of the flame surface. Under the condition of constant combustion load, the residence time of flue gas in the flame surface, i.e. high temperature zone, is shortened, so the generation of NOx is reduced. The mixed promotion burner is designed according to this principle.
Low NOx precombustion chamber burner
The precombustion chamber is a high-efficiency, low NOx staged combustion technology developed and studied in China in recent 10 years. The precombustion chamber is generally composed of primary air (or secondary air) and fuel injection system. The fuel and primary air are quickly mixed to form a fuel rich mixture in the primary combustion area of the precombustion chamber. Due to lack of oxygen, only part of the fuel is burned, The fuel releases volatiles in the primary flame zone with poor oxygen and low flame temperature, so the generation of NOx is reduced.
This paper is compiled by Foshan Shunde Zhibo combustion engine manufacturing Co., Ltd / 。
Baidu Encyclopedia Literature: low nitrogen combustion engine
