The grate of the mechanical grate waste incinerator is divided into three areas: drying area, combustion area and ember area. Under the action of the pusher, the garbage first enters the drying area, and through the action of the grate, the garbage moves forward on the grate to the combustion area, and finally reaches the burning area.
The mechanical grate is divided into fixed grate, sliding grate and turning grate. The reciprocating motion of the grate is driven by a hydraulic linkage mechanism, and the relative movement between the fixed grate and the turning grate pushes the garbage to roll upward, making the garbage roll upward. It is evenly mixed in the process of moving, which is conducive to fire and combustion.
The primary air is blown in from the back of the grate sheet through the horizontal holes set at the front. The sides of the grate pieces are finished. Each row of grate pieces is fixedly assembled with each other to form a whole, and the air cannot pass through the gap. This design can effectively reduce the amount of ash leakage and avoid any possibility of being lifted. Each row of grate is separated by a special shaped refractory cast iron. The grate pieces and the separated cast iron are made of heat-resistant, corrosion-resistant and wear-resistant castings containing Cr, Ni, Mo and other alloying elements, with long service life.
The side and upper surfaces of the grate pieces are finished to avoid wear effectively. At the same time, there is a reasonable expansion gap between the movable grate and the fixed grate and the side wall to ensure that the grate will not rub against the side wall during operation. Due to the reasonable selection of grate material and structural design, the overall service life of the grate can reach 80,000 hours.
The garbage enters the inclined downward grate through the feeding hopper (the grate is divided into drying area, combustion area, and burnout area). (When the garbage enters from one area to another, it plays a big turn over) until it burns out and is discharged from the furnace. Combustion air enters from the lower part of the grate and mixes with the garbage. The high-temperature flue gas passes through the heating surface of the boiler to generate hot steam, and the flue gas is also cooled. Finally, the flue gas is treated by the flue gas treatment device and discharged.