How to better control the furnace temperature of biomass boiler

The following six parts can be reformed to make the reformed boiler have high thermal efficiency, more energy-saving, environmental protection and economy; The budget cost is small, and only a part can be modified to meet the requirements of burning biomass particles. This requires professional boiler manufacturers to carry out transformation. Generally, biomass boiler manufacturers have boiler transformation services, so you can directly talk to the biomass boiler manufacturers.

First, the blast system transformation

Reasons for transformation:

1. The existing blast system is controlled by damper, and its wind force is difficult to control.

2. Cold air is used for air intake. Because biomass particles need a lot of oxygen when burning, the air volume must be large and the wind must be strong.

Centralized coal-fired boilers use cold air. When the temperature of furnace membrane is low during biomass combustion, the firepower will be greater.

It's getting smaller The raw material temperature of boiler is extremely low. Cause the boiler steam pressure and steam quantity can not meet the requirements. So the existing explosion

The system is only suitable for coal burning, not for biomass particles.

The effect after transformation:

1, the intake and oxygen supply of hot air increase the combustion-supporting effect;

2. Control the airflow direction and make full use of the boiler heat exchange;

3, the control of wind power is beneficial to the ignition point and burning surface of biomass particles, so that the biomass particles can be fully burned;

4. Using hot air to supply oxygen greatly improves the temperature and firepower of the furnace. The boiler heats up quickly, and the steam pressure and steam of the boiler are higher than those of the original coal burning.

Second, increase the transformation of the secondary oxygen production system

Reasons for transformation:

When biomass particles burn, they first split quickly, one part burns directly, and the other part produces combustible gas (combustible flue gas), which requires secondary oxygen supply and secondary combustion. If the oxygen supply is insufficient and the combustion is insufficient, the smoke pipe will emit a lot of smoke, which will lead to environmental protection failure. The original coal-fired boiler was not designed for secondary oxygen supplement, so it would cause a lot of smoke from the nozzle.

Turn it into an effect:

1. During the combustion of biomass particles, the combustible gas (combustible black smoke) generated during the combustion of biomass particles is subjected to secondary oxygen supplement and secondary combustion, so that its heat energy can be fully utilized, and the problems of frequent smoke windows and poor environmental protection of black smoke in biomass boilers are solved.

2. After the second oxygen supplement, the air flow direction is controlled to make it hot and fully utilized, and the thermal efficiency of the boiler is obviously improved.

Third, the air intake system transformation

Reasons for transformation:

The induced air system of coal-fired boiler is relatively simple, with only a single induced air, without using the heat of boiler exhaust gas, while the induced air of biomass boiler needs large air volume and uniform distribution.

The effect after transformation:

1. The size of the induced air system can be controlled at any time. It fully cooperates with the blast system and the secondary oxygen supply system to enhance the airflow effect of the furnace and make the boiler absorb and exchange heat more effectively.

2, the use of boiler flue gas heat. So that the boiler can generate hot air for oxygen supply and hot air distribution. Biomass particles are fully combusted, and the humidity of the furnace increases. Increase calorific value.

Fourth, the transformation of the kiln

Reason for transformation: At present, the air outlet of the furnace is too large and the smoke outlet is too open, which causes a lot of heat to be discharged with the flue, shortens the heat exchange time of the boiler and seriously reduces the thermal efficiency.

The effect of the transformation: after the transformation, the air volume of the furnace is reduced, the temperature of the furnace is controlled and the flow rate of hot air is slowed down.

Modification of verb (verb abbreviation) feeding system

Reason for transformation: Because the ignition point of biomass particles is lower than that of coal, the hopper backfires, which leads to the ignition and combustion of particles in the hopper, causing great safety hazards.

Benefits of the transformation: After the transformation of the feeding system, the hopper and the furnace are separated and cut off, and the temperature is controlled, so that the hopper and the combustion particles are separated, and there is no direct combustion, thus eliminating the information of potential safety hazards.

Six. Control system reform

Reason for transformation: The existing control system is only suitable for coal-fired boilers, and the control system suitable for biomass boilers must be redesigned.

The effect of the transformation: automatic control, reducing the amount of labor, and effectively controlling the burning amount of biological particles. Greatly reducing the operation cost. The effect of overall transformation: improve the furnace (combustion chamber) environment, make biomass briquette burn fully and completely, and eliminate black smoke, oxalic acid and tar from the source of catalytic cracking.