1-20t/h Large Block Grate

▌Product introduction

Large block grate is suitable for supporting boilers below 20t/h, with good ventilation effect. Large grate pieces are made by casting dozens of grate pieces between the two active chain belts in the ordinary chain belt grate horizontally and simplifying them. There are tens of ventilation holes on the grate pieces, and four pin holes in the lower part to pass through the pin shaft. The grate pieces are large grate pieces cast into one, with improved working reliability and low metal consumption.

▌Applicable scope and requirements
（一）Scope of application
Chain-belt chain grate is a mechanized layer-burning equipment, which can be used for supporting boilers with evaporation capacity of 1-25t/h, and also for various heating and drying equipment. Suitable for burning bituminous coal, lignite and peat. Specially designed, it can also be used as biomass fuel combustion equipment with bagasse, wood, rice husk and other raw materials.
（二）Use requirements

The quality of coal used in this grate shall meet the following requirements:

(1) The maximum particle size of coal block shall not exceed 40mm, and it is not suitable to burn coal chips below 0-5mm.

(2) The moisture content of coal shall be less than 20%, preferably 8-10%.

(3) The ash content of coal shall not be more than 30%, but shall not be less than 10%, and the volatile content shall not be less than 20%.

(4) The ash melting temperature of coal shall be greater than 1290C

(5) Poor coking.

(6) The low calorific value of coal should not be greater than 4226kcal/kg

(7) If the above coal quality requirements conflict with the coal feeding setting, the highest value shall be taken.

The primary air temperature used by this grate shall not exceed 200C.

▌Structural features
Components: 1. Driving shaft; 2. Driven shaft; 3. Support; 4. Ash discharge device; 5. Air conditioning device; 6. Furnace chain; 7. Coal hopper; 8. Front damper; 9. Side seal.

▌Model parameters

▌Structure and characteristics

(1) Simple structure, low metal consumption and large ventilation section ratio; The strength and performance requirements of the main and driven shafts and grate plates are high.

(2) A number of independent air chambers that are mutually decomposed are set inside the grate longitudinally. The primary air entering the air chamber decreases its speed due to diffusion and can evenly fill the air chamber. The inlet air volume of each air chamber can be adjusted by the air conditioning device

(3) Each air chamber is equipped with ash discharge device. The bottom of the air chamber is arranged with the ash dropping bottom plate with the ash dropping mouth, and the movable door connected on the ash dropping pull rod usually covers the ash dropping mouth. When the ash handle is pulled regularly, the ash will fall from the ash falling mouth to the furnace chain below, and the ash will be carried to the ash receiving hopper in the front section or near the ash removal door by the furnace chain, and the ash will be removed manually.

(4) The grate runs normally after commissioning in the factory, and the whole machine leaves the factory. (It can also be delivered in parts according to user requirements)

▌Advantage

1. Good ventilation effect;

2. Low metal consumption.