Product Introduction
Scale grate (also known as scale chain grate) is a common mechanized combustion equipment in industrial boilers, mainly used for fuel transportation, combustion, and ash discharge in coal-fired boilers. Its structure consists of multiple stacked flake shaped grate plates, which are continuously operated through chain transmission and suitable for small and medium-sized layer fired boilers (such as chain grate boilers).
Scale grate is an efficient and reliable coal-fired boiler combustion equipment, suitable for small and medium-sized industrial boilers. Its advantages lie in stable combustion and flexible adjustment, but attention should be paid to wear and coal leakage issues. Reasonable selection, standardized operation, and regular maintenance can significantly extend its service life.
Product parameters
| product name |
Scale grate |
| material |
Heat-resistant Steel,Cast Iron,Cast Steel,Mild steel,Carbon Steel,Alloy Steel, etc. |
| Material standards |
ASME,SAE,NF EN,DIN EN,ISO,BS EN,etc |
| port |
Qingdao Port, Tianjin Port, Guangdong Port. |
| delivery time |
7~15 days |
| country of origin |
Shandong, China |
| Specification drawing software |
PDF, Auto CAD,Solidworks,JPG, ProE,etc. |
| Main production equipment |
Wax injection, CNc-machine-center, Lathe, Miling machine,Driling machine,Boring Lathe,Grinding Machine, Heattreatment Furnace. |
| Heat treatment machine |
Mesh-Belt-Furnace,Carburizing Quench Furnace,Chamer Furnace,etc. |
| Surface Treatment |
Cold/Hot zn Plating,Blackening Treatment,Ni Plating,cr plating,Spraying Undercoat,Anti.
Rust Paint,Surface Paint,Plastic Paint,Coated Anti-Rust Water,Anti-oil,etc. |
| Surface Heat Treatment |
Medium Frequence Quenching,High Frequence Quenching and Carburizing and Quenching,Oil Quenching,Waterquenching,Normalizing,Temper,Annealing,etc. |
| Dimensional Inspection |
Calipers,Height Laugue,Micrometer Calipers,Inside Caliper Gauge,Angle and R Gauge,four coordinates measuringinstrument. |
| productivity |
50000 tons /year |
| package |
Wooden boxes, iron boxes, and others |
Company Profile
Shandong Jiaguang International is a high-tech enterprise focusing on the research and development, production, sales and service of boiler parts. The company has 30 years of manufacturing experience, as well as modern production base and senior technical team, to ensure to meet the needs of friends from all walks of life for products, and through the ISO9001 international quality system certification, CE certification, SGS origin certification.
The company's main products cover: Active grate, passive grate, grate pin, beam grate, scale grate, reciprocating grate, fixed grate, grate, chain grate, chain rod, scraper accessories, buried scraper chain, boiler hood, boiler tube, steel pipe, square tube, gear and other heat resistant, wear-resistant, corrosion resistant boiler accessories, widely used in electricity, heat, heating, paper mill, printing and dyeing factory, sugar factory, animal farming, Feed mill, chemical industry, etc. Products are exported to Vietnam, Singapore, Thailand, India, India, Pakistan, Tajikistan, Australia, New Zealand, Mexico, Russia, Malaysia, Philippines, South Africa and other more than 30 countries and regions.
It is committed to providing high-quality accessories and solutions for global industrial boilers, power station boilers, civil boilers and other fields, and has become a global benchmark enterprise in the field of boiler accessories.
Product Certification
Product packaging
1. Principles of Packaging Design
Protection Shock proof and buffering: precision accessories (such as instruments and valves) need to be filled with foam, bubble film, pearl cotton, etc. to avoid damage caused by transportation shock.
Moisture and rust prevention: Metal components (such as pipelines and flanges) need to be coated with rust prevention oil and packaged with moisture-proof film or vacuum. Desiccant should be added during sea transportation.
Anti pressure and anti drop: Heavy accessories (such as burners and drums) are reinforced with wooden boxes or steel frames, indicating the load-bearing direction and stacking layer limits.
2. Standardization and identification
Comply with international transportation standards (such as ISO, ISTA), indicate weight, size, lifting point, "fragile", "moisture-proof", "upward" and other markings.
Dangerous accessories (such as fuel injectors) must be labeled with UN certification and comply with the International Maritime Dangerous Goods Code (IMDG).
3. Container division strategy
Small items (bolts, washers) should be packaged in a uniform size box to avoid loose parts; Large items (heat exchangers) are individually customized in wooden boxes with supporting frames inside.
Product transportation
Transportation mode selection
1. Shipping by sea
Suitable for bulk accessories such as steel plates and large pipelines, pay attention to container size (20GP/40HQ) and load balance.Sea freight requires anti salt spray treatment, with moisture-proof agents placed inside the container and sealed.
2. Land transportation
Heavy accessories (over 3 tons) require flatbed trucks or low chassis vehicles, and routes should be planned in advance to avoid height/weight restrictions.Cross border transportation inspection of various countries' requirements for wooden packaging (such as ISPM15 fumigation certificate).
3. Air freight
Urgent small items (electronic controllers) should be prioritized for air transportation, and the weight of each item should be controlled (usually<100kg) to reduce packaging weight and save costs.
FAQ:
Q1: What could be the possible reason for the jamming or freezing phenomenon of the scale grate during operation?
A1: Deformation or wear of grate plates: Long term high temperature causes deformation of scales, or uneven gaps after wear, which can jam moving parts.
Foreign object blockage: Coal slag, coke blocks, or metal debris get stuck between the grate plates.
Insufficient lubrication: Poor lubrication of the chain or guide rail leads to increased friction.
Installation deviation: The grate frame is installed unevenly, resulting in uneven local stress.
Solution: Stop the machine to clean up foreign objects, replace deformed grate plates, strengthen lubrication, and correct installation level.
Q2: How to solve the serious coal leakage in the scale grate?
A2: Excessive gap between grate plates: worn or not adjusted to the standard gap (usually 1-2mm) during installation.
Coal quality issues: Coal particles that are too fine or have low moisture content are prone to leakage from gaps.
Poor closure of scales: Some scales do not move properly or deform.
Solution: Adjust or replace the gap between the grate plates, control the coal particle size (recommended 10-25mm), and check the scale closure mechanism.
Q3: What is the reason for the elongation or breakage of the scale grate chain?
A3: Long term high temperature fatigue: The chain material is not resistant to high temperatures and experiences creep and elongation.
Overload operation: Excessive coal consumption or severe coking, resulting in increased chain load.
Poor lubrication: Lack of oil leads to increased wear on the chain and sprocket.
Solution: Replace the high-temperature resistant alloy chain, control the load reasonably, and lubricate regularly (it is recommended to use high-temperature grease).
Q4: How to prevent grate burning or rapid oxidation?
A4: Material not up to standard: Ordinary cast iron grate plates are not heat-resistant (heat-resistant cast iron or alloy steel should be selected).
Localized overheating: Uneven air distribution leads to high combustion temperatures in some areas.
Shutdown cooling too fast: Immediately open the air door after shutdown to accelerate the oxidation of cold air.
Solution: Upgrade the material, adjust the air distribution uniformity, and slowly cool down when shutting down the furnace.
Q5: How to deal with the deviation of the scale grate (unilateral wear)?
A5: Uneven chain tension: The tension of the chains on both sides is not consistent.
Wear or offset of guide rail: One side of the guide rail is severely worn, causing the grate to tilt.
The drive shaft is not parallel: the sprocket installation is not aligned.
Solution: Adjust the tension of the chain again, repair or replace the guide rail, and correct the parallelism of the drive shaft.
Q6: What could be the possible cause of abnormal noise (metal friction/impact sound) during grate operation?
A6: Scale detachment or loosening: fastening bolt breakage, scale collision.
Wear of sprocket teeth: Poor meshing between the chain and sprocket.
Lack of oil in the guide rail: Sharp noise generated by dry friction.
Solution: Check and tighten the scale bolts, replace the worn sprocket, and replenish the guide rail lubricating oil.
Q7: How to extend the service life of the scale grate?
A7: Regular maintenance: Clean up accumulated dust and coke residue, and check the integrity of scales.
Standardized operation: Avoid overloading operation and cool down according to regulations when shutting down the furnace.
Select high-quality accessories: high temperature resistant and wear-resistant materials (such as high chromium cast iron).
Monitor combustion status: prevent coking or local high temperature.
Contact our professional engineering team promptly when encountering any questions!
Contact our professional engineering team promptly when encountering any questions!
Product parameters
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