Septic Intake Nozzle Air Mixing for Faster Pumping and Fewer Blockages
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Solution Overview
Problem
Current septic service processes are inefficient due to blockages in vacuum hoses and the weight of liquid waste, which slows suction and complicates hose manipulation, requiring extended pumping times and additional handling steps.
Innovation Solution
An intake nozzle with a mechanism to mix air into the liquid waste at the intake point, featuring a hollow rotor with spiral vanes and air outlet ports, reducing the weight of the liquid column and preventing blockages by aerating the waste and facilitating faster flow through the hose.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a standard suction hose is used without air mixing, then the structure is simple, but the pumping time is long (about one hour) and blockages occur frequently
Solution Approach 1:
The hollow rotor is nested inside the tubular body of the nozzle, with the rotor canister positioned within the housing. This nested configuration allows the air mixing mechanism to be integrated into the nozzle structure without significantly increasing external dimensions, thereby improving pumping speed while controlling device complexity
Solution Approach 2:
Air is introduced as an intermediary substance through the air intake tube and air outlet ports to mix with the liquid waste. This air-liquid mixing reduces the effective density and weight of the waste column, improving flow velocity and pumping efficiency while preventing blockages
2Speed
If the suction hose carries dense liquid waste, then the pumping function is maintained, but the weight of the liquid waste slows suction and creates manipulation difficulties
Solution Approach 1:
The system uses pneumatic principles by introducing compressed air through the air intake tube and air outlet ports into the liquid waste stream. This air injection creates air-liquid mixture that reduces the effective weight and density of the moving waste column, thereby increasing flow velocity and reducing the gravitational resistance that slows suction
Solution Approach 2:
The physical parameters of the waste material are changed by introducing air, which alters the density and flow characteristics of the liquid column. The air mixing transforms the dense liquid waste into a lighter air-liquid mixture, changing the weight parameter from the full liquid density to a reduced effective density, thereby improving flow velocity
3Reliability
If the nozzle penetrates below the liquid surface, then effective suction is achieved, but the hose manipulation becomes more difficult due to weight
Solution Approach 1:
The air mixing mechanism provides a counteracting effect to the weight of the liquid waste column. By introducing air into the waste stream, the effective weight is reduced, creating a counterbalancing effect that offsets the gravitational pull on the dense liquid, thereby easing hose manipulation while maintaining suction effectiveness
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
The solution significantly reduces pumping time from one hour to approximately 24 minutes, minimizes blockages, and eases hose manipulation by reducing the weight and density of the liquid waste column within the hose.
Implementation Method 1
incorporates a mechanism that mixes air into the liquid at the intake point
Implementation Method 2
the rotor having a number of twist or spiral vanes on its perimeter. The flow of the liquid past the rotor vanes causes the hollow canister to rotate
Implementation Method 3
A vacuum pump evacuates the tank to about minus 18 to minus 21 inches of mercury (about minus 10 psig), and the hose inserted into the septic tank sucks the waste up through the hose into the tank on the truck
Implementation Method 4
The air outlet ports can be nozzles directing the air flow to produce rotation
Data Source
AI summary
An intake nozzle fits onto the suction hose of a vacuum pumper truck. The nozzle comprises a tubular housing and the rotor within the housing near the intake end. The rotor includes a hollow cylindrical canister and spiral vanes on its exterior. Ambient air enters an air tube, penetrates the side of the housing and supplies ambient air to the interior of the canister. The air exits through outlet ports into the liquid waste as it moves past under vacuum. The injected air reduces the density of the liquid waste, speeding up the pumping process and reducing the incidence of blockages.