Beam-type chain grate structure

The beam-type chain grate, as an efficient and durable combustion device, is widely used in various boiler systems, especially playing an important role in large industrial boilers. This article will analyze its composition and characteristics in detail in conjunction with the structural diagram of the beam-type chain grate.

Basic composition of the beam-type chain grate:

The beam-type chain grate mainly consists of the following parts: beam, grate bars, drive chain, front shaft (driving shaft), rear shaft, guide rails, sealing devices, and coal feeding devices, etc. Below is a detailed description of these components:

Beam: The beam is the main load-bearing and transmission component of the grate, usually made of high-strength materials, such as heat-resistant and wear-resistant HT150-200. The beam has high rigidity, which can ensure the stability and durability of the grate during operation. The beam is fixed on the drive chain, and the movement of the grate is achieved through the transmission of the chain.

Grate bars: The grate bars are the combustion carriers installed on the beam, which are not subjected to force but are used to support the fuel and facilitate combustion. Grate bars are usually made of heat-resistant materials that can withstand high temperatures without deformation. The design of the grate bars makes the grate surface relatively flat, which is conducive to the uniform combustion and ventilation of the fuel.

Drive chain: The drive chain is the power transmission component of the beam-type chain grate, generally consisting of two or more chains. These chains are driven by sprockets mounted on the front shaft (driving shaft), thereby driving the movement of the entire grate. The strength and wear resistance of the chain are crucial for the stable operation of the grate.

Front and rear shafts: The front shaft, as the driving shaft, is equipped with a sprocket to drive the drive chain and the movement of the beam. The rear shaft serves to support and guide, ensuring the stability and direction of the grate during movement.

Guide rails: The guide rails are divided into upper and lower guide rails, used to guide the movement of the chain and the beam. The upper and lower guide rails must remain straight and accurately spaced to ensure the smooth movement of the grate. The material and processing precision of the guide rails have a significant impact on the operating performance of the grate.

Sealing devices: To prevent the leakage of hot air and ash from the furnace, the beam-type chain grate is also equipped with sealing devices. These devices are usually installed on the front and rear sides and the edges of the grate, using special sealing structures to prevent air and material leakage.

Coal feeding device: The coal feeding device is used to add fuel to the furnace. Modern beam-type chain grates often use layered coal feeding devices, which can greatly improve the combustion efficiency of coal.

Characteristics of the beam-type chain grate:
High structural rigidity: The beam-type chain grate uses a strong beam as the load-bearing component, making the overall structure of the grate stable and durable.
Grate bars are heated but not stressed: The grate bars are installed on the beam, not subjected to force but only heated, thus providing better working conditions and not easily deforming due to heat.
Moderate ventilation cross-section ratio: The ventilation cross-section ratio of the grate is generally between 6.5% and 9.5%, which is conducive to the full combustion and ventilation of the fuel.
Stable and reliable operation: The structural design of the beam-type chain grate is reasonable, with stable and reliable operation, capable of continuous work for long periods.
Convenient maintenance: The replacement of grate bars is convenient, and damaged grate bars can be easily replaced even during operation.

Conclusion:

The beam-type chain grate, with its characteristics of high structural rigidity, grate bars being heated but not stressed, stable and reliable operation, and convenient maintenance, has been widely used in large industrial boilers. Through a detailed analysis of its structural diagram, we can gain a deeper understanding of the working principle and advantages of the beam-type chain grate. In the future, with continuous technological advancements and the ongoing promotion of applications, the beam-type chain grate is expected to play an important role in more fields.