Screw Conveyor Nozzle Layout for CIP Cleaning Coverage
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Solution Overview
Problem
Conventional CIP cleaning methods for poultry carcass cooling and conveying systems fail to adequately clean spiral screw vanes, rotating shafts, and housing surfaces due to obstruction and dead angles created by the complex geometry of the screw vanes and nozzle placements.
Innovation Solution
The implementation of diffusion nozzles with a 60-degree or greater spray angle, provided in pairs on the rotating shaft and inner wall of the housing, ensures comprehensive coverage and reduces dead areas, allowing for effective cleaning of all surfaces without obstructing the poultry carcasses or damaging them during transport.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional flushing nozzles are provided on the rotating shaft and inner wall of the housing, then the system structure is simple, but the screw vanes obstruct the wash water spray and create dead areas where cleaning is insufficient
Solution Approach 1:
The housing inner wall is divided into multiple spray zones, each equipped with independent flushing nozzles. This segmentation allows wash water to be sprayed from multiple discrete locations, ensuring that the complex curved surfaces of the screw vanes are thoroughly cleaned without creating dead areas, while maintaining a manageable nozzle configuration.
Solution Approach 2:
Flushing nozzles are positioned not only on the housing inner wall but also on the rotating shaft itself, adding a radial dimension to the spray coverage. This multi-dimensional nozzle arrangement ensures that wash water reaches all surfaces of the screw vanes from different angles, eliminating blind spots caused by the vanes' complex geometry.
2Reliability
If the number of flushing nozzles is increased to cover all surfaces, then cleaning coverage is improved, but the device complexity and cost increase
Solution Approach 1:
Multiple flushing nozzles are strategically grouped and positioned to work in coordination, with nozzles on the housing wall and rotating shaft combining their spray patterns to achieve complete coverage. This merging approach allows a relatively small number of nozzles to collectively clean all surfaces of the screw vanes, including curved surfaces, without requiring an excessive number of individual nozzles.
Solution Approach 2:
The rotating shaft with mounted nozzles provides dynamic cleaning capability, as the nozzles rotate with the shaft to spray wash water from different angular positions throughout the cleaning cycle. This dynamic positioning allows fewer nozzles to achieve comprehensive coverage compared to static nozzle arrangements, reducing the total number of nozzles needed while maintaining excellent cleaning 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
This configuration ensures reliable and efficient CIP cleaning of the entire system, reducing costs by minimizing the number of nozzles required and enhancing the cleaning coverage, thereby maintaining hygiene and operational efficiency.
Implementation Method 1
The diffusion nozzles are nozzles capable of spraying wash water in a spray angle of 60 degrees or more
Implementation Method 2
a coolant circuit connected to an inlet and an outlet of the housing; a heat exchanger provided in the coolant circuit
Data Source
AI summary
In a hollow cylindrical housing which stores a coolant, a feeding device having a rotating shaft and spiral screw vanes fixedly installed on the periphery of the rotating shaft is provided. At least one first diffusion nozzle is provided in each pitch of the screw vanes on the inner wall of the housing. A pair of second diffusion nozzles are provided for every pitch of the screw vanes on the outer periphery of the rotating shaft respectively at different positions in the axial direction of the rotating shaft and at mutually opposite positions in the circumferential direction of the rotating shaft. The first diffusion nozzles are supplied with wash water through a high-temperature water piping provided on the upper outside of the housing, while the second diffusion nozzles are supplied with wash water through a channel formed in the interior of the rotating shaft.