Add:Yantun, Paoai Village, Wafangdian City, Liaoning Province, China
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45t/h Reciprocating grate
Reciprocating grate is driven by hydraulic pressure, the structure is relatively stable, easy to adjust. The fuel tumbling and running speed in each region can be controlled individually, so the stay time of fuel in each region can be controlled precisely, and ensure that the biomass fuel can completely burned out.
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Reciprocating Type Grate
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▌Product introduction
The design of inclined air cooling reciprocating grate can increase the volume of the furnace, which is beneficial to the burning of volatile components.
The design of inclined air cooling reciprocating grate is also conducive to the high content of biomass fuel tumbling fully in the preheating zone of the grate, the radiation of fuel each surface can be obtained in high temperature flue gas, accelerate the evaporation of water, so that the fuel can burn stably while tumbling to the grate combustion zone.
▌Advantage
Reciprocating grate is driven by hydraulic pressure, the structure is relatively stable, easy to adjust. The fuel tumbling and running speed in each region can be controlled individually, so the stay time of fuel in each region can be controlled precisely, and ensure that the biomass fuel can completely burned out.
▌Applicable scope and requirements
（一）Scope of application
Reciprocating type grate can be used for 1t-200t/h boilers, with a wider range of fuel selection.
（二）Use requirements
The quality of coal used in this grate shall meet the following requirements
(1) Particle size requirements: the maximum particle size of coal block shall not exceed 40 mm, the fine coal of 0-6 mm shall not account for less than 50% of the fuel problem, and the content of coal of 0-3 mm shall be less than 25%
(2) The moisture content of coal shall be less than 15%, and 5-10% is the best.
(3) The ash content of combustion shall not be less than 10%, and the ash melting point is better than 1200 ℃.
▌Structural features
Reciprocating type grate is composed of coal hopper, support, movable beam, fixed beam, grate plate (movable grate plate and fixed grate plate) front windshield and transmission system.
▌Model parameters
| Boiler evaporation | Effective area of grate m2 | Effective width of grate mm | Ventilation sectional area ratio | Drive shaft torque N.m | Dip angle |
| 4 t/h | 5.56 | 1600 | 6-8% | 2000 | User-defined |
| 6 t/h | 6.08 | 1600 | 6-8% | 3000 | User-defined |
| 8 t/h | 8.5 | 2100 | 6-8% | 4000 | User-defined |
| 10 t/h | 12.99 | 2020 | 6-8% | 5000 | User-defined |
| 15 t/h | 22.04 | 3300 | 6-8% | 7500 | User-defined |
| 30 t/h | 29.65 | 3730 | 6-8% | 30000 | User-defined |
| 40 t/h | 40 | 4630 | 6-8% | 40000 | User-defined |
| 65 t/h | 60.16 | 7020 | 6-8% | 60000 | User-defined |
| 100 t/h | 99.56 | 10480 | 6-8% | 75000 | User-defined |
| 130 t/h | 100 | 11580 | 6-8% | 100000 | User-defined |
| 160 t/h | 153 | 14700 | 6-8% | 125000 | User-defined |
| 200 t/h | 185 | 17780 | 6-8% | 150000 | User-defined |
| 260 t/h | 248 | 18400 | 6-8% | 185000 | User-defined |
| 300 t/h | 295 | 20700 | 6-8% | 210000 | User-defined |
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▌Structure and characteristics
(1) The whole combustion surface of the grate is composed of movable grate and fixed grate, which are stacked into a stepped shape at intervals. The fixed grate is installed on the grate fixed beam, and the fixed beam is fixed on the grate frame. The movable grate is embedded on the movable beam of the grate, the movable beam is installed on the movable frame, and the movable frame is placed on the bracket of the grate frame. The movable frame is connected with the external transmission mechanism by a connecting rod.
(2) When the motor is started, the connecting rod will pull the movable frame under the drive of the reducer, so that the movable grate plate will move back and forth on the fixed grate plate. The reciprocating stroke is determined according to the specific size of the grate plate and the specific coal quality of the boiler during the grate design. Generally 70-180 mm.
(3) Sectional air supply is adopted inside the grate. The grate is provided with several mutually independent air chambers along the longitudinal direction, and the air enters the air chamber from the bellows or air duct on both sides. The inlet air volume of each air chamber is regulated by the air conditioning device.
(4) The coal hopper is installed on the wall panels on both sides of the support, and the coal seam thickness is adjusted by the lifting of the coal gate.
(5) The grate can be delivered in two forms: complete and parts. Users can choose according to their needs.
(6) One of the main characteristics of the inclined reciprocating grate, which is different from the chain grate, is the relative movement of the grate and coal. When the movable grate moves backward and downward, part of the new coal is pushed to the top of the coal that has been burned. When the movable grate moves forward and upward, part of the coal that has been burned returns to the bottom of the unburned coal to heat the new coal. This kind of ignition condition is similar to that of the manual furnace, but better than that of the chain furnace. In the process of being pushed, coal is constantly squeezed, thus destroying coke block and ash shell. At the same time, the coal rolls slowly, making the coal seam loose and flat, which is conducive to combustion.
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