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SB70 Series Equipment Solution for Drying Fans in Timber Processing Plants Solution
SB70 Series Equipment Solution for Drying Fans in Timber Processing Plants Solution
SB70 Series
Features and Benefits
This solution is applied to a large overseas high-end solid wood panel processing enterprise, targeting its core bottleneck process — the timber drying section, to provide variable frequency drive (VFD) retrofit and upgrade for the 690V/2400kW centrifugal main circulation fan matched with a single drying kiln. This fan is the core equipment that determines the drying quality of panels, production efficiency and energy consumption costs.
I. Core Pain Points of the Original System
1.Severe Grid Impact and High Power Distribution Risks
The high starting current of the motor caused instantaneous voltage drop in the 690V plant power grid, frequently triggering alarms and unplanned shutdowns of precision equipment on the same network segment, including CNC cutting machines, high-precision sanders and hydraulic presses. Under extreme working conditions, it was also prone to activate the overcurrent protection of the power distribution system.
2.Persistently High Energy Consumption and Extremely Low Operating Efficiency
The fixed-speed fan relied on damper opening to adjust air volume, with an average damper opening of only 65% throughout the entire drying cycle. A large amount of electric energy was lost in damper throttling, leaving the fan operating in a low-efficiency range for a long time.
3.Severe Equipment Wear and High Operation & Maintenance (O&M) Costs
Damper throttling subjected the fan impeller and bearings to long-term alternating airflow impact, resulting in rapid dust accumulation and wear of the impeller. Shutdown was required every 3 months for dust cleaning and dynamic balance calibration, leading to a short average service life of the bearings and persistently high O&M costs.
II. Core Solution
This project adopts the core solution of the SB70 Series 690V low-voltage high-power multi-drive variable frequency drive, replacing the original damper throttling system. It customizes a closed-loop control logic tailored to the characteristics of the timber drying process, and simultaneously optimizes system protection and harmonic suppression, fully adapting to the working condition requirements of the timber processing industry in all dimensions.
1.Core Advantages of System Architecture: The 690V low-voltage multi-drive variable frequency solution realizes stepless speed regulation, reduces the starting inrush of the motor, and greatly lowers the threshold for project construction, daily operation and maintenance.
2.Customized Process Control Logic: A closed-loop variable frequency speed regulation control strategy is customized for the timber drying process, which completely replaces manual damper adjustment and realizes fully automatic operation throughout the entire drying process.
3.Specialized Safety and Protection Design: The protection design is adapted to the high temperature and high humidity environment of the timber processing industry, with built-in power failure protection and grid voltage fluctuation adaptive function, to avoid panel scrap caused by unexpected interruption of the drying process.
III. Project Operation Results
1.Fully Optimized Electrical Performance: The variable frequency drive delivers a low starting current with minimal impact on the power grid, eliminating the interference of motor starting on the plant's precision equipment. The total harmonic distortion of the grid current (THDi) is effectively reduced through the matched input reactor and DC reactor.
2.Remarkable Energy Saving and Consumption Reduction Effect: Through process collaborative control and algorithm optimization, the comprehensive energy saving rate of the system far exceeds the enterprise's expectations.
3.Greatly Reduced O&M Costs: The maintenance cycle of the fan impeller is extended to more than 12 months, and the service life of the bearings is significantly improved. The elimination of the damper throttling mechanism completely solves the long-standing problems of damper jamming and wear, and greatly reduces the workload of manual inspection.
IV. Solution Value
This project accurately addresses the common pain points of drying fans in the timber processing industry. Through the 690V low-voltage high-power variable frequency drive retrofit, it has achieved comprehensive breakthroughs in four dimensions: electrical performance, energy saving & consumption reduction, product quality, and operation & maintenance costs. It fully verifies the excellent drive control performance and outstanding application adaptability of SLANVERT low-voltage products.
This project accurately addresses the common pain points of drying fans in the timber processing industry. Through the 690V low-voltage high-power variable frequency drive retrofit, it has achieved comprehensive breakthroughs in four dimensions: electrical performance, energy saving & consumption reduction, product quality, and operation & maintenance costs. It fully verifies the excellent drive control performance and outstanding application adaptability of SLANVERT low-voltage products.
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