Ship Unloading Screw Pump Horizontal Fluidizing Nozzles
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Solution Overview
Problem
Existing worm pumps used in ship unloading systems face challenges due to ship tilting and wave movements, requiring improved sealing and fluidization mechanisms to handle bulk materials efficiently, especially when dealing with non-continuous feed streams and varying flow rates.
Innovation Solution
The design incorporates a horizontally arranged conveyor screw with fluidizing agent nozzles within the conveying pipe, ensuring reliable fluidization and pressure resistance, with a closure device like a pivoting flap to prevent backflow, optimizing the pressure area's geometry for reduced height and effective sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the inlet device is designed with conventional vertical arrangement of fluidizing agent feed devices, then the system can handle bulk material conveyance, but the overall height of the inlet system becomes excessive, reducing cargo space on the ship
Solution Approach 1:
The patent applies dimensional transformation by reorienting the fluidizing agent feed devices from a vertical arrangement to a horizontal arrangement within the conveyor pipe. The devices are positioned to feed fluidizing agent in the horizontal plane through the conveyor pipe, transforming the spatial configuration from vertical (height-oriented) to horizontal (length-oriented), thereby reducing the overall height of the inlet system and freeing up cargo space on the ship.
2Length of stationary object
If the inlet device uses a compact pressure zone design, then the overall height is reduced, but dead spaces may increase and fluidization completeness may be compromised
Solution Approach 1:
The patent applies local quality by strategically positioning the fluidizing agent feed devices at specific locations within the pressure zone. The devices are arranged to target specific areas where dead spaces or poor fluidization are likely to occur, ensuring localized and complete fluidization. This selective positioning allows for effective fluidization in a compact pressure zone design, maintaining reliability while reducing overall height.
3Reliability
If the inlet device is designed to handle discontinuous feed flows with pressure resistance, then backflow prevention is improved, but the complexity of the sealing mechanism increases
Solution Approach 1:
The patent applies self-service by designing a closure device that automatically responds to pressure differences and flow conditions. The closure device is positioned at the inlet opening and automatically opens when bulk material flows into the feed zone and closes when flow stops or reverses, using the system's own operating conditions to control its state. This automatic operation provides reliable backflow prevention without requiring complex external control mechanisms.
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 enhances fluidization, minimizes dead spaces, and ensures efficient bulk material transfer with reduced height requirements, maintaining pressure resistance and preventing material deposition, even under fluctuating flow conditions.
Implementation Method 1
the bulk material is taken up in the feed area and conveyed further via a screw conveyor, thus sealing off the pressure area from the feed area during conveying
Implementation Method 2
transferring the bulk material to the pressure area, where it is loosened and fluidized
Data Source
AI summary
The invention relates to a screw pump for conveying bulk material. The aim of the invention is to further develop existing screw pumps for use in ship unloading systems and to improve the feeding device for use in the ship unloading process. The feeding device according to the invention is characterized in particular in that the device arranged in the pressure region (1) for supplying a fluidizing agent (6) is arranged partly, largely, or completely on at least one horizontal plane extending through the conveying pipe (2) when the screw conveyor (3) of the feeding device is arranged horizontally.