The following six parts can all be modified, so that the thermal efficiency of the boiler after modification is high, and it is more energy-saving, environment-friendly and money-saving; The budget cost is small, or you can choose to only transform part of it to meet the requirements of burning biomass particles. This needs a professional boiler manufacturer to carry out the transformation. General biomass boiler manufacturers have boiler transformation services, so you can go directly to the biomass boiler manufacturers to negotiate.

1. Renovation of the blast system

Reasons for renovation:

1. The existing blast system is controlled by the damper, and its wind power 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 force must be concentrated

. Now coal-fired boilers are blown by cold air. When the temperature of furnace film is low during biomass combustion, the firepower will be smaller and smaller. Boiler raw temperature is extremely slow. Cause the boiler steam pressure and steam quantity can not meet the requirements. Therefore, the existing blast

system is only suitable for burning coal but not biomass particles.

Effect after transformation:

1, hot air intake and oxygen supply will increase the combustion promotion effect;

2, airflow control direction, make full use of boiler heat exchange;

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

4. Using hot air to feed oxygen greatly improves the temperature and firepower of the furnace. The temperature of the boiler is fast, and the steam pressure and steam of the boiler are higher than that of the original coal burning.

Second, adding a secondary oxygen system for renovation

Reasons for renovation:

When biomass particles are burned, they first split rapidly, and some of them are directly burned and the other part produces combustible gas (combustible smoke) which needs secondary oxygen supplement and secondary combustion. If oxygen supply is insufficient and combustion is insufficient, the flue pipe will emit a lot of smoke, which will lead to environmental protection failure; The original coal-fired boiler is not designed with secondary oxygen supplement, so it will cause a lot of smoke to be discharged from the nozzle. < P > Transformation effect:

1. When the biomass particles are burned, the combustible gas "combustible black smoke" generated during the combustion of biomass particles is combusted by secondary oxygen supplement, so that its heat energy can be fully utilized, and the problems of frequent smoke windows and substandard environmental protection of black smoke are solved.

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

III. Renovation of air intake system

Reason for renovation:

The air intake system of coal-fired boiler is relatively simple, and it is only a single air intake. It does not use the heat of boiler exhaust gas, while the air intake of biomass boiler needs large air volume and uniform distribution.

Effect after transformation:

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

2. Utilize the heat of boiler flue gas. So that the boiler can generate hot air for oxygen supply and hot air distribution. The biomass particles are fully combusted and the humidity of the furnace is increased. Increase calorific value.

Fourth, furnace reconstruction

Reason for reconstruction: At present, the furnace outlet is too large, and the exhaust is too open, so that a lot of heat is discharged with the flue pipe, which shortens the heat exchange time of the boiler and seriously reduces the thermal efficiency.

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

v. transformation of feeding system

transformation reason: Because the ignition point of biomass particles is lower than that of coal combustion, the hopper backfires, which causes the particles in the hopper to catch fire and burn, causing great potential safety hazards.

Benefits after transformation: after transformation of feeding system, the hopper and the furnace are separated and cut off, and the combustion particles are separated, so there is no direct combustion, and the safety hidden information is eliminated.

VI. Transformation of control system

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

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