The important influencing factors of boiler obedience
The hot obedience of the boiler is a very nervous goal to weigh the boiler. The important factors that affect the boiler's obedience are: the loss of exhaust gas temperature, loss of heat dissipation, incomplete burning of fuel and fouling of the boiler. Because the loss of heat dissipation after the innovation of the incinerator and the comparison between the fouling of the boiler and that before the innovation have not changed, there is no influence on the thermal compliance of the boiler. There are two factors that are important before the innovation of the incinerator and after the innovation of the incinerator, that is, the loss of exhaust gas temperature and the incomplete burning level of fuel. Therefore, this paper focuses on the influence of these two factors on the compliance of the boiler. Heat loss of exhaust gas temperature
The heat loss of exhaust gas temperature is very important in the heat loss of gas boiler, which depends on the exhaust gas temperature and excessive atmosphere coefficient λ. (excessive atmosphere coefficient is the ratio of the actual atmosphere quality provided by burning 1kg fuel to the atmosphere quality required by burning 1kg fuel completely on the surface, which is the common goal of studying combustible gas factors in China and Russia, often revealed by symbolic means). λ is related to the loss of exhaust heat Q1: credential resume formula: Q1 = (0.5 + 3.5 λ) (t exhaust - t case temperature)
In operation, it is necessary to reduce Q1 to improve the boiler's burning compliance as much as possible on the premise of ensuring complete burning. The high exhaust temperature of the boiler will cause the boiler's heat compliance to drop. The heat loss of exhaust gas increases with the increase of exhaust gas temperature and atmosphere coefficient. There is steam in the exhaust gas of the gas boiler, and the superheated steam is the important wearer of the heat in the flue gas. Therefore, in addition to the sensible heat, there are also a large number of latent heat in the exhaust gas of the gas boiler. This large area (about 70%) of one-sided heat loss can experience the purchase of touch type heat exchange buildings.
Focus technology
Low nitrogen incinerator + FGR method
The original boiler incinerator was upgraded to meet the new emission standard with a nitrogen oxide content below 30mg / m3, which is enough to mark the ultra-low nitrogen emission and contribute to China's environmental protection miracle.
FGR method alliance upper hand:
(1) less CO is produced;
(2) NOx emission reduction results are remarkable, less than 30%;
(3) reduce boiler load and gas consumption;
(4) the arrangement is simple and the occupied space is small;
Low nitrogen incineration technology is to achieve low nitrogen emissions while maintaining high incineration compliance. Accurate air-fuel ratio control and fluid control technology are also the foundation for low emission. If the flue gas is accepted again, the nitrogen emission of the incinerator will be further reduced.
Five systems of boiler low nitrogen incinerator:
1. Air supply system: the function of the air supply system is to send the atmosphere with certain wind speed and breeze into the incineration chamber. The key components are: shell, fan motor, fan impeller, air gun and fire pipe, damper controller, damper baffle, cam adjusting mechanism and dispersion plate.
2. Combustion system: the effect of combustion system lies in the inclusion of combustion atmosphere and fuel, and its key components include: combustion transformer, combustion electrode, electric fire high-voltage cable.
3. Monitoring system: the function of the monitoring system is to ensure the safe and stable operation of the incinerator. Its key components include flame monitor, pressure monitor, temperature monitor, etc.
4. Fuel system: the function of fuel system is to guarantee the fuel required for incineration of incinerator. The main points are: oil pipe and discussion, oil pump, solenoid valve, nozzle, heavy oil preheater.
5. Electric control system: therefore, in the middle of instruction and containment of each system in the electric control system, it is important to master that the component is the program controller. Different incinerators are equipped with different program controllers. The most common program controllers are LFL series, LAL series, loa series and LGB series. The most important difference is the time difference of each French step.
——Author：ebico