Rubble Suction Pipe Layout for High-Velocity Waste Separation
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Solution Overview
Problem
Existing technologies for disposing of construction debris as mixed waste are costly and unsustainable, failing to effectively separate materials like insulation materials from heavier debris for recycling.
Innovation Solution
A suction device with adjustable flow velocity and detachable attachment to construction machines, allowing selective separation of construction waste based on material density, using a suction pipe with a blower to separate lighter materials like insulation from heavier rubble.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional suction devices with large flow cross-sections are used to handle construction waste, then the volume flow capacity is sufficient, but the flow velocity is too low (below 10 m/s) to effectively separate and transport larger waste pieces
Solution Approach 1:
The suction device employs a two-stage suction pipe system where the first suction pipe has a larger cross-section for initial waste intake, and the second suction pipe has a smaller cross-section for high-velocity transport. This dynamic transition allows the system to adapt flow characteristics along the transport path, achieving both high volume flow capacity at the inlet and high flow velocity in the transport section.
Solution Approach 2:
The suction device is divided into multiple functional sections with different flow cross-sections. The first suction pipe section is optimized for waste intake with larger dimensions, while the second suction pipe section is optimized for high-speed transport with smaller dimensions. This segmentation allows each section to perform its specific function optimally without compromising the other.
2Speed
If the suction pipe diameter is reduced to increase flow velocity, then transport capability improves, but the suction opening becomes too small to effectively intake larger construction waste pieces
Solution Approach 1:
The suction pipe is segmented into two distinct sections: a first suction pipe with larger diameter for effective waste piece intake, and a second suction pipe with smaller diameter for high-velocity transport. This segmentation resolves the contradiction by providing both large intake capability and high transport velocity in different sections of the same system.
Solution Approach 2:
The system dynamically transitions from a large cross-section configuration at the suction opening to a small cross-section configuration in the transport section. This dynamic change in flow cross-section allows the system to accommodate both large waste pieces during intake and achieve high flow velocities during transport.
3Productivity
If high flow velocity is achieved through small flow cross-sections, then waste transport efficiency improves, but energy losses increase due to turbulence and friction
Solution Approach 1:
The system uses a dynamic transition between different flow cross-sections to optimize the balance between transport efficiency and energy loss. The larger first suction pipe reduces turbulence during waste intake, while the smaller second suction pipe achieves high transport velocity with controlled energy expenditure.
Solution Approach 2:
By segmenting the suction pipe into two sections with different cross-sections, the system localizes high-velocity flow to only the necessary transport portion, rather than maintaining high velocity throughout the entire suction system. This reduces overall energy losses while maintaining transport efficiency.
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
Facilitates efficient on-site separation and recycling of construction waste, reducing environmental and health risks from dispersed fibers, and enhancing disposal efficiency.
Implementation Method 1
a suction blower (4) connected to the suction pipe (3) on the suction side for generating a volume flow capable of carrying construction waste (1)
Implementation Method 2
an average flow velocity, which is determined by the quotient of the volume flow generated or generateable by the suction blower (4) and the flow cross-section limited by the suction pipe (3), assumes a value in the range between 10 m/s and 100 m/s
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
Suction device (7) for separating construction waste (1), comprising: - a suction pipe (3) with a suction nozzle (2) for sucking in construction waste (1), - a suction blower (4) connected to the suction pipe (3) on the suction side for generating a volume flow capable of carrying construction waste (1), and - a separation container (6) connected to the suction blower (4) on the pressure side for receiving sucked-in construction waste (1), wherein the suction pipe (3) limits a flow cross-section of the volume flow passing through the suction pipe (3), and the suction pipe (3) and the suction blower (4) are dimensioned such that an average flow velocity, which is determined by the quotient of the volume flow generated or generateable by the suction blower (4) and the flow cross-section limited by the suction pipe (3), assumes a value in the range between 10 m/s and 100 m/s.