Reciprocating Grate Biomass Boiler

SZW reciprocating grate boiler is also named as step grate boiler, pusher grate boile, Which is divided into upper boiler proper and lower combustion equipment. Compared with other types boilers, reciprocating grate biomass boilers are better burning with high moisture and low calorific value, or bulky bio waste fuel/irregular sized fuels. Of course, this kind of boiler has a larger steam separation area, provides high-quality steam, larger steam storage capacity, etc.

We offer both compact and semi-assembled reciprocating grate boiler, whose benefits include fuel flexibility, low maintenance, easy start and stop, high efficiency, high availability, and reliability.

Key Highlights of SZW Biomass Boiler

Capacity range 4 – 60 TPH, Pressure Up to 40 bar pressure
Tube & tile / Full Membrane wall furnace
Saturated / Superheated steam (up to 450˚C)
Multiple Biomass fuel options are available
Fuel’s with High Moisture upto 55 – 60% can be fired
Replacement of grate Bar is very easy
Resistance in High Temp and low wear & tear
pares are easily available is in house and are economical

Core Technology

The grate speed and angle can be adjusted according to different fuels to ensure complete combustion. It is divided into drying zone, burning zone, post-burning zone and ash zone.

The bottom of the feeding device has a rotatable adjusting plate, where has seeding wind. When changing the angle between adjustment plate and horizontal plane, the dropping point on the grate can be adjusted.

Three sets of secondary air are set on the furnace.

The pitch of convection heating surface is in-line arrangement.

Advantages

1. Increase the combustion share of middle furnace, reduce the overall temperature of the furnace.
2. Set secondary air, makes the fuel burn out in the furnace。
3. Raise the furnace, increase a large section burn-out chamber, reduce the outlet flue speed, reduce the fly ashamount.
4. Large angle low-speed reciprocating grate to extend the fuel stay time in the furnace, and is conducive to downwardmovement of fly ash.
5. Water-cooled short front arch reduce the temperature before the furnace; adjust the primary air and second air amount before the furnace to control the ignition point.
6. The slow movement of grate makes the fuel gradually moved backward, increase the stay time of the fuel in the furnace
7. Convection heating surface is in the medium temperature and speed to reduce wear.
8. The air preheater with bypass flue duct;adjust the gate of bypass flue duct to change the primary air and flue gas temperature.

9. Biomass fuel is apt to slagging, the convection bank has acoustic wave soot blower, which may remove the soot, and cleaning door is equipped.

10. Both air cooled and water cooled grate designs available, depending on the cooling method selected as per the fuel characteristics