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Engineering Excellence Case Study: Huzhou Jiajun Thermal Power Co., Ltd.

Furnace Inspection Technology Revolution: Vertical Lifting Platform Based on Modular Topology

Project Background And Technical Challenges

Client: Huzhou Jiajun Thermal Power Co., Ltd.
Application Scenario: Vertical surface inspection and maintenance of water-cooled walls and heating surfaces inside a large-scale Circulating Fluidized Bed (CFB) boiler furnace.
Core Constraint: The boiler access port is a standard DN600 manhole, imposing a strict geometric constraint on the size of all equipment components entering the furnace.

Traditional furnace inspection relies on internal scaffolding erection, a method that presents significant technical and operational bottlenecks:

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Innovative Solution: Ultra-Small Manhole Modular Vertical Lifting Platform

To address the specific constraints faced by Huzhou Jiajun Thermal Power, we provided the Ultra-Small Manhole Modular Vertical Lifting Platform-an engineered solution designed for DN600 manhole access and vertical furnace inspection requirements.

odular Topology And Non-Destructive Assembly Technology

The platform is constructed from high-strength, lightweight alloy materials and designed based on a modular topological structure. The maximum external dimension of all components is strictly controlled to be under 580mm, ensuring smooth and rapid passage through the DN600 manhole.

Rapid In-Furnace Integration

Platform components are integrated inside the furnace using high-precision bolted connections, achieving weld-free, non-destructive rapid assembly. This process not only protects the integrity of the boiler structure but also significantly reduces on-site preparation time.

Precise Vertical Positioning

The platform incorporates a highly reliable electric vertical lifting system, enabling continuous, stable, and high-precision ascent and descent along the vertical surface of the furnace. This ensures full coverage and zero blind spots for inspection of critical areas like water-cooled walls and heating surfaces.

Redundant Safety And High Reliability Design

Safety is the paramount indicator for special equipment inspection. The platform's design incorporates multiple redundant safety mechanisms, elevating its safety level far beyond that of traditional scaffolding.

Safety Mechanism	Technical Description	Advantage
Dual Wire Rope System	Independent main lifting wire rope and safety wire rope, providing mutual redundancy.	The platform maintains a safe state even if the main rope fails.
Anti-Drop Safety Lock	Equipped with a mechanical centrifugal safety lock that triggers a locking mechanism in milliseconds upon overspeed or rope failure.	Ensures the platform is passively locked against the furnace wall under any sudden condition.
Electrical Limit Protection	Dual limit switches for upper and lower travel prevent the platform from exceeding preset safety boundaries.	Avoids rigid collision between the equipment and the furnace roof or bottom.
Load Monitoring And Alarm	Real-time monitoring of platform load; automatic lock and audible/visual alarm upon overload.	Strictly controls the weight of operating personnel and tools, preventing over-capacity operation.

Project Outcomes And Quantified Benefit Analysis

By deploying the Modular Vertical Lifting Platform, Huzhou Jiajun Thermal Power Co., Ltd. successfully upgraded its inspection model, achieving significant economic benefits and safety improvements.

Key Performance Indicator (KPI)	Traditional Scaffolding Method	Innovative Platform Solution	Performance Improvement
Equipment Entry/Assembly Time	7.0 Days	1.5 Days	Critical Path Time Reduced by 78.6%
In-Furnace Operation Efficiency	Intermittent, height-dependent	Continuous, full vertical coverage	Inspection Efficiency Increased by > 30%
High-Altitude Operation Risk Index	High	Low	Safety Level Significantly Enhanced
Comprehensive Outage Cost	High (including lost power generation revenue)	Low	Substantial Economic Benefits

Conclusion: The Future Standard For Industrial Inspection

This case study unequivocally demonstrates the technical feasibility and economic superiority of the Ultra-Small Manhole Modular Vertical Lifting Platform in solving complex industrial boiler inspection challenges. The platform not only resolves the geometric constraints of the DN600 manhole but also establishes a new standard for safety and efficiency in power industry furnace inspection through its highly reliable safety design and efficient vertical operation capability.

We are committed to applying cutting-edge engineering technology to industrial maintenance, providing clients with safer, faster, and smarter inspection solutions.