Qingyun Hongsheng Machinery Parts Co., Ltd. is one of the most reliable manufacturers and suppliers of reciprocating grate for biomass boiler in China. We warmly welcome you to wholesale high quality reciprocating grate for biomass boiler at low price from our factory. If you have any enquiry about quotation, please feel free to email us.
What is a Reciprocating Grate for Biomass Boilers?
A reciprocating grate for biomass boilers is a critical component specifically designed for burning biomass fuels, such as wood chips, straw, rice husks, and similar materials. It is primarily installed at the bottom of the combustion chamber in biomass boilers. Its core necessity lies in the fact that biomass fuels often have irregular shapes, potentially high moisture content, and varying ash characteristics, making it difficult for ordinary fixed grates to achieve stable and efficient combustion. This type of grate features alternating movable and fixed grate bars, driven by a mechanical device to perform a reciprocating motion. This action slowly and evenly pushes the fuel forward while agitating the fuel bed and promoting the removal of ash and slag. This mechanism is crucial for ensuring complete fuel combustion, preventing slagging on the grate, and enabling continuous automated operation.
Due to its exceptional fuel adaptability and operational reliability, reciprocating grates are widely used in the field of biomass combustion, particularly in industrial heating and biomass power generation projects. Their core function is to create a dynamic and controllable combustion bed, distributing the processes of fuel drying, pyrolysis, combustion, and burnout in an orderly manner across different zones of the grate. By adjusting the speed and frequency of the grate's movement, the residence time and combustion intensity of the fuel in the furnace can be precisely controlled. This maximizes energy extraction from the fuel while effectively reducing fly ash carbon content and minimizing harmful gas emissions. It serves as a fundamental guarantee for achieving efficient, clean, and stable operation of biomass boilers.
Common Casting Materials
Heat-resistant cast iron
In the category of heat-resistant cast iron, common grades include RTCr16 and RTCr20, among others. The advantages of these materials lie in their relatively low cost and their possession of certain heat and corrosion resistance properties, making them suitable for projects with relatively mild operating conditions or those sensitive to initial investment. Their main limitation is the deterioration of the material's microstructure under prolonged high temperatures, leading to a decline in mechanical performance. In particular, their resistance to chlorine corrosion from biomass fuels is weak, which typically results in a limited service life.
High-chromium cast iron
Currently, the most widely used material is high-chromium wear-resistant cast iron, with typical grades such as BTMCr20 and BTMCr26. These materials feature high hardness and excellent wear resistance. Relying on their high chromium content, they can form a dense chromium oxide protective layer on the surface, effectively resisting corrosive substances in the ash. Practice has shown that their lifespan when burning various types of biomass is significantly better than that of ordinary heat-resistant cast iron. However, their disadvantages include relatively high brittleness and poor thermal shock resistance, making them prone to cracking under severe temperature fluctuations.
Austenitic heat-resistant steel
For the most demanding applications, austenitic heat-resistant cast steel is used, such as SCH24 (25Cr-20Ni). This type of material, owing to its high chromium and nickel content, exhibits excellent strength, toughness, and creep resistance at high temperatures. It can also withstand thermal fatigue and severe chlorine corrosion. Therefore, it is selected for critical parts of large-scale power plants or boilers handling highly corrosive fuels. Of course, its extremely high alloy cost also limits its range of application.
Grate Types Product Showcase
Frequently Asked Questions
What types of biomass fuels is it suitable for?
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The grate design is widely applicable to various solid biomass fuels, including forestry waste, agricultural residues (such as rice husks, corn stalks), and partially processed fuels (such as pellets and briquettes).
Can the dimensions and specifications be customized?
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Yes, absolutely. We have strong engineering design capabilities and can provide customized Reciprocating Grate solutions based on your boiler size, thermal power, and specific fuel characteristics.
How is the equipment's anti-slagging capability?
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Its reciprocating motion has a self-cleaning effect, effectively breaking up slag blocks and peeling off ash crust, which is key to preventing severe slagging and maintaining the permeability of the combustion bed.
What is your company's production capacity and delivery timeline?
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We have mature production lines and sufficient capacity. Delivery timelines for standard products are guaranteed. For customized Reciprocating Grate for Biomass Boilers, we will confirm an accurate schedule based on the complexity of the project.
How can we contact you?
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You can reach us via phone or email. We have dedicated customer service available 24/7. For any product inquiries, we will respond within 8 hours. You can leave your product requirements via email or WeChat, and our sales manager will get in touch with you.
Email: qyhsmachinery@126.com
Phone: +86 17380040246
WeChat: 17380040246
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