Principle of ignition rod of biomass boiler

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The principle of the biomass boiler ignition rod is very simple, which is to intercept the spark in the flue gas and prevent it from entering the bag filter, so as to prevent the bag filter from being burned. The flue gas produced during boiler combustion and the flue gas produced during normal combustion are treated with a bag filter. The flue gas dust enters the cyclone dust collector or (flame arrester) from the dust removal pipe. At this time, the large particles in the dust are separated under the centrifugal force of the cyclone dust collector. The large particle dust is settled by the cyclone dust collector, and the fine particle dust is discharged from the pipeline into the bag filter. The dust attached to the surface of the cloth bag is filtered by the high-temperature cloth bag, settled by pulse jetting, and concentrated in the dust collecting hopper of the dust collector, which is recovered or utilized by the automatic material cleaning controller. The clean air treated by the bag dust collector is passed through the fan through The chimney vents into the atmosphere. The dusty flue gas of the boiler is treated by the bag filter, which can reduce the pollution of the flue dust to the surrounding environment and achieve the purpose of clean production. Then, let's understand the principle of the ignition rod of the biomass boiler together! The basic treatment process of the flue gas of the biomass boiler.

Is : The flue gas dust produced by boiler combustion first enters the cyclone dust collector or flame arrester through the suction pipe. The unburned sparks in the medium are captured by the flame arrester, and the fine particle dust enters the bag filter. After the dust attached to the surface of the bag is filtered by the dust bag, it is concentrated in the ash hopper of the dust collector by means of pulse soot blowing, and is recovered or utilized by the emission controller. The flue gas treated by the bag filter is discharged into the atmosphere through the chimney through the fan.

Material Boiler bag filter pellet fuel is currently mainly processed from sweet sorghum stalks, corn stalks, cotton stalks, wheat or rice stalks, branches, reeds and other straws as raw materials to replace biomass energy. After the raw material is burned, the powder is very fine and non-corrosive. The S02 and NOz components in industrial biomass boiler dust are low, and the ash content of biomass briquette fuel is about 1.8%. After combustion, most of the ash is formed, which is removed by the slag removal system, and the fly ash is discharged along with the flue gas. It has low density and fine grain. feature. Therefore, the spark is lighter when burning, and it is not easy to burn completely. It is easy to enter the pipeline with the suction of the fan, causing the bag to be burned and damaged. Therefore, the pipeline between the biomass boiler and the dust collector needs to be installed with a flame arrester. The function of the flame arrester is to prevent the open flame or constant light of the flame from entering the gas system, causing combustion and explosion accidents. Its working principle is: when the flame passes through the narrow air hole, due to the sudden increase of heat loss, the combustion cannot continue and the flame is extinguished.

Since the biomass boiler ignition rod is composed of many small channels and gaps, when the flame enters these small channels, many small flame streams will be formed. At this time, the heat transfer area of ​​the channel is large, and the flame cools down through heat exchange through the channel wall. When the temperature drops to a certain temperature, the flame will naturally go out. According to the experiment, whenever the thermal conductivity of the flame arrester material is increased to 460 times, the extinguishing diameter of the flame only changes by 216%, which mainly shows that the material is secondary. On the side, heat transfer is one of the reasons why the flame goes out, but not the main reason. The main structure of the biomass boiler ignition rod:

1. Upper box body: including a flip cover (or fastening cover) and an air outlet.

2. Middle box: including perforated panels, access doors, ladders, etc.

3. Lower box: ash unloading valve, etc.

4. Injection system: including pulse controller, electromagnetic pulse valve, injection pipe and air bag.

Biomass boiler ignition rod installation

1. The ground foundation needs to be leveled and fixed with cement.

2. Put down the box first, then stack the upper box on top, find a fixed point, and fix it after aligning with the screw holes.

3. The inlet of the pipeline is connected with the mouth of the ash hopper, which is the inlet of dust.

4. The outlet of the upper box is connected with the inlet of the bag filter with a pipeline.

5. The signal line of the pulse valve is connected to the power distribution cabinet (we will provide the installation diagram)

6. The ladder guardrail is welded on the flame arrester.

7. After all the installation is completed, it can be turned on and used.

The above is the principle of the ignition rod of the biomass boiler. If you want to know more about it, please feel free to contact us!