Clog-Resistant Nozzle for Water Treatment Conduit
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Solution Overview
Problem
Existing header conduits in water and wastewater treatment systems face inefficiencies in sludge removal due to blockages, energy loss, and clogging, particularly when dealing with long fibers and flat materials, which hinder the flow of sludge into the conduit and require more energy to overcome inertia.
Innovation Solution
The implementation of nozzles that direct sludge and liquid into the header conduit along a tangential path, maintaining momentum and preventing clogging by using multiple entry points and acute angled inlets, ensuring continuous flow and reducing the likelihood of blockages by flat materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If apertures are formed through the wall of the header conduit to allow sludge entry, then sludge can be drawn into the conduit, but the apertures become clogged by long fibers and flat materials blocking the flow
Solution Approach 1:
The single aperture is divided into multiple inlet openings arranged in a pattern around the conduit. This segmentation ensures that if one inlet becomes blocked by fibers or flat materials, others remain open to maintain sludge removal functionality.
Solution Approach 2:
The inlets are arranged in a two-dimensional pattern around the conduit rather than a single central opening. This spatial distribution across multiple dimensions prevents complete blockage and allows sludge to enter from various angles.
2Productivity
If negative pressure is applied to the header conduit to draw sludge in, then sludge removal is initiated, but more energy is required to overcome the inertia of compacted sludge
Solution Approach 1:
The conduit is moved into the sludge before negative pressure is applied, allowing sludge to naturally flow into the inlets along the movement path. This preliminary mechanical action reduces the energy needed for negative pressure to overcome sludge inertia.
Solution Approach 2:
Negative pressure is applied to draw sludge into the conduit, utilizing pneumatic principles to move the sludge-liquid mixture efficiently with reduced energy input compared to purely mechanical methods.
3Productivity
If the header conduit is moved into the sludge to collect material, then sludge collection is enabled, but the sludge becomes compacted ahead of the conduit making flow difficult
Solution Approach 1:
Multiple inlets distributed around the conduit allow sludge to enter from different locations, preventing compacted sludge from completely blocking the entry path and maintaining collection efficiency.
Solution Approach 2:
The liquid phase acts as an intermediary that flows more easily than compacted sludge, carrying sludge particles into the conduit through the inlets and reducing the direct impact of sludge compaction.
4Productivity
If apertures allow sludge to enter the conduit, then material collection occurs, but the flow must turn axially causing kinetic energy dissipation and back pressure buildup
Solution Approach 1:
The conduit has a circular cross-section with inlets arranged around it, allowing sludge to enter tangentially and follow a curved path along the circular interior. This curved flow path reduces abrupt direction changes and minimizes kinetic energy loss compared to forcing flow into a single axial direction.
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 approach enhances the efficiency of sludge removal by maintaining velocity and preventing clogging, reducing energy requirements, and ensuring consistent flow without settling issues within the conduit.
Implementation Method 1
directing a flow of sludge and liquid into a header conduit along a path that is tangential to an inner surface of the header conduit... maintaining momentum and preventing clogging
Implementation Method 2
Negative pressure is applied to one end, or to a central point, of the header conduit in an attempt to cause the liquid and the sludge to flow from the bottom of the basin and enter apertures
Data Source
AI summary
A nozzle is provided for a header conduit. The nozzle includes an inlet that is resistant to clogs caused by flat materials covering the inlet. The inlet generally includes multiple pathways to an elongated passageway through which waste liquid and sludge (“waste”) are guided and enter the header conduit. In one embodiment, the elongated passageway is oriented to guide the waste along a path that is tangential to at least the inner surface of the header conduit which such incoming waste first contacts. When the conduit has an inner surface of circular cross-section, the passageway may optionally be elongated enough that the incoming waste enters the header conduit along a path tangential to the circular surface. To better assure axial flow of the waste in the conduit to an outlet, in one embodiment the passageway provides both the tangential flow and is at an acute angle to the longitudinal axis of the conduit. The incoming waste is thereby provided with an axial component. In this manner, the passageway assures that the energy and momentum of the incoming waste is helical in direction. The waste previously admitted into the header conduit is urged by the newly entering waste to continue to flow helically in the conduit. The passageways are provided at spaced intervals along the length of the conduit to collect sludge from a wide area of the bottom of the basin. Because of the tangential orientation of each of the passageways and the resulting initial tangential flow of the incoming waste, the waste incoming from each of those multiple passageways reinforces the existing helical flow of waste in the conduit.