Ventilation Element for Asphalt Mixing Steam Line Dust Control
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Solution Overview
Problem
In the production of asphalt material, the addition of used asphalt material can lead to dusty water vapor being released, which may not be adequately discharged, causing dust deposits in the mixing unit and potentially clogging discharge openings, disrupting the manufacturing process.
Innovation Solution
Incorporating an aeration element in the steam line connected to the mixing unit, which ensures the reliable discharge of dust-laden vapor by creating a pressure difference between the mixing unit and the dedusting unit, allowing for passive ventilation and preventing dust accumulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a steam line connects the mixing unit to the dust extraction unit without venting, then the structure is simple and passive, but dust-laden steam cannot flow reliably when pressures are equal or when mixing unit pressure is lower, causing dust deposits and clogging
Solution Approach 1:
A ventilation element is introduced as an intermediary component in the steam line. This element includes a ventilation opening that allows ambient air to enter the steam line, creating a pressure difference that drives the flow of dust-laden steam from the mixing unit to the dust extraction unit. The ventilation element acts as a mediator that enables reliable steam discharge without requiring active blowers or complex pressure control systems.
2Use of energy by moving object
If the steam line is designed as passive without blowers, then energy consumption is reduced and device complexity is minimized, but steam flow cannot be ensured when pressure in mixing unit is less than or equal to pressure in dust collection unit
Solution Approach 1:
The ventilation element enables the steam line to self-regulate its operation. When the pressure in the mixing unit drops below or equals the pressure in the dust collection unit, the ventilation opening automatically allows ambient air to enter, creating a pressure difference that drives steam flow. This self-service mechanism eliminates the need for external energy input or active control systems while ensuring reliable steam discharge under varying pressure conditions.
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
This solution effectively prevents dust deposits in the mixing unit and ensures reliable discharge of dusty vapor into the dedusting unit, maintaining process efficiency and preventing clogging, even when the pressure in the mixing unit is equal to or less than that in the dedusting unit.
Implementation Method 1
creating a pressure difference between the mixing unit and the dedusting unit, allowing for passive ventilation
Implementation Method 2
Air, especially ambient air, can flow through the ventilation element, particularly passively, into the steam line and, in particular, along the direction of steam flow
Data Source
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AI summary
A device for producing asphalt material comprises a mixing unit (2), a waste asphalt granulate feed line connected to the mixing unit (2), a steam line (6) connected to a steam discharge opening (5) of the mixing unit (2) for connection with a dust extraction unit (7), and a ventilation element (12) for ventilating the steam line (6).