Vertical Belt Coal Blending Layout for Precise Proportion Control
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Solution Overview
Problem
Existing coal blending methods, such as the grab bucket and coal stacking methods, are not suitable due to equipment incompatibility and site conditions, leading to inadequate coal blending in coal transportation systems.
Innovation Solution
A coal blending and burning system based on a belt conveyor with a vertical process module, utilizing multiple coal feeding systems, electronic scales, and a vertical drop tube with a baffle for precise control of coal blending and distribution on multiple belt conveyors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional grab bucket or coal stacking blending methods are used, then coal blending can be achieved, but equipment incompatibility and site condition limitations prevent their application
Solution Approach 1:
The system divides the coal blending process into multiple independent belt conveyor segments (first belt conveyor, second belt conveyor, third belt conveyor) that can operate independently and be configured flexibly according to site conditions. Each conveyor segment handles specific blending tasks, allowing the system to adapt to various spatial constraints and equipment layouts without requiring complete redesign.
Solution Approach 2:
The belt conveyor system serves multiple functions: it conveys coal from storage, performs blending at different stages, distributes blended coal to different destinations, and enables both single-coal and blended-coal operation modes. This multi-functionality replaces the need for specialized grab buckets or stacking equipment, making the system universally applicable to different site conditions.
2Productivity
If multiple coal feeding systems discharge simultaneously onto the same conveyor, then blending efficiency improves, but coal mixing uniformity and proportion control become difficult
Solution Approach 1:
The second belt conveyor acts as an intermediary between the first belt conveyor (receiving coal from multiple feeding systems) and the third belt conveyor (transporting blended coal). This intermediate stage allows coal from different feeding systems to be thoroughly mixed and redistributed, ensuring uniform blending proportions even when multiple systems discharge simultaneously. The intermediary conveyor breaks up clumps and redistributes coal evenly across its width.
Solution Approach 2:
The system uses electronic scales positioned on the belt conveyors to continuously monitor coal flow rates from each feeding system. The controller receives this feedback information and dynamically adjusts the discharge rates of individual coal feeding systems to maintain the desired blending proportions. This closed-loop control ensures precise blending ratios while maintaining high blending efficiency.
3Volume of moving object
If vertical drop tube is used to convey coal from first belt conveyor to second belt conveyor, then space utilization improves, but coal flow distribution control becomes challenging
Solution Approach 1:
The system employs adjustable flow distribution mechanisms at the inlet of the vertical drop tube that can dynamically change the distribution pattern of coal flow. These mechanisms allow operators to adjust the spread and concentration of coal as it enters the vertical conveyor, optimizing both space utilization and flow distribution control depending on the specific operational requirements and blending ratios needed.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables flexible, accurate, and thorough coal blending with precise proportion control, ensuring stable combustion by allowing real-time adjustment and even distribution of coal types on conveyors, overcoming equipment incompatibility and site condition limitations.
Implementation Method 1
a vertical drop tube, provided with an input port located at a top portion and an output port located at a bottom portion; the input port is connected to the first belt conveyors A and B, and the output port is connected to the second belt conveyor
Data Source
AI summary
A coal blending and burning system based on a belt conveyor with a vertical process module includes a coal feeding system No. 1 provided with discharge ports 1A and 1B for outputting a coal type A; a coal feeding system No. 2 provided with discharge ports 2A and 2B for outputting a coal type B; a first belt conveyor A provided with electronic scales 1A and 2A, respectively; a first belt conveyor B provided with electronic scales 1B and 2B, respectively; a vertical drop tube; a second belt conveyor for transporting coal materials output from the vertical drop tube; a third belt conveyor for transporting coal materials output from the second belt conveyor to a coal supply end; and a controller for controlling coal blending on the first belt conveyor A, the first belt conveyor B, or the second belt conveyor.