Self-Cleaning Negative-Pressure Ejector for Waste Gas Blockage Prevention
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Solution Overview
Problem
Conventional negative-pressure devices for treating industrial waste gas face issues such as equipment damage, reduced decontamination ability, and the need for frequent maintenance, leading to increased costs and complexity due to blockages and the inability to operate during maintenance.
Innovation Solution
A self-cleaning negative-pressure ejector with a suction chamber, jet pipe, and flushing members that generate high negative pressure and use gas and/or liquid jets to prevent blockages, allowing for automatic dust cleaning and extended operation without manual intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a flexible tube is used to prevent blocking by disturbing solid dust, then the tube can adapt to flow changes, but the tube will often be broken during long time usage causing equipment damage
Solution Approach 1:
The patent removes the flexible tube component entirely and replaces it with a rigid structure equipped with a self-cleaning mechanism. The self-cleaning mechanism uses a cleaning ball that moves along with the fluid flow to automatically remove solid dust deposits, extracting the blockage prevention function from the flexible tube while eliminating its weakness of breaking over time.
Solution Approach 2:
The system implements self-service through the self-cleaning mechanism where the cleaning ball automatically removes solid dust deposits using the kinetic energy of the flowing fluid. This eliminates the need for manual intervention and allows the system to maintain its own performance without external assistance, thereby extending service life.
2Productivity
If the tube wall is made small and path is made long to increase mixing, then the decontamination ability decreases, but the mixing efficiency improves
Solution Approach 1:
The patent segments the long tube into multiple sections with inclined surfaces and adds self-cleaning mechanisms at strategic points. This segmentation allows the mixing function to be maintained through the extended path while the self-cleaning mechanisms periodically remove solid dust deposits that would otherwise accumulate and reduce decontamination ability.
Solution Approach 2:
The self-cleaning mechanism performs preliminary action by continuously or periodically removing solid dust deposits before they can accumulate to levels that would significantly reduce decontamination ability. This proactive cleaning maintains the tube's effectiveness throughout its service life.
3Productivity
If conventional technology is used for waste gas treatment, then the equipment can operate normally, but it must be shut down for maintenance which leads to shutdown of overall manufacturing process
Solution Approach 1:
The self-cleaning mechanism enables the system to perform its own maintenance by automatically removing solid dust deposits during normal operation. This self-service capability eliminates the need for shutdowns to clear blockages, allowing continuous operation and preventing manufacturing process interruptions.
Solution Approach 2:
The self-cleaning mechanism ensures continuous useful action by maintaining the tube's cleaning effectiveness throughout operation. The cleaning ball continuously moves along the tube, removing deposits as they form, which maintains decontamination ability without interruption and allows the waste gas treatment to continue without shutdown.
4Productivity
If multiple sets of spare equipment are kept to avoid shutdown, then the overall cost increases and the complexity of waste gas treatment increases
Solution Approach 1:
By equipping a single piece of equipment with self-cleaning capability, the system eliminates the need for multiple spare units. The self-service feature allows one unit to maintain its own performance, replacing the need for redundancy and thereby reducing both cost and complexity while maintaining operational continuity.
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 self-cleaning negative-pressure ejector effectively prevents blockages, maintains high decontamination efficiency, reduces maintenance frequency, and extends equipment lifespan by using inclined fluid directions and flushing mechanisms to remove solid particles and water vapor, ensuring continuous operation with no consumable risks.
Implementation Method 1
an exit port of the jet pipe being disposed in the suction chamber and ejecting a second fluid so that a negative pressure being generated in the suction chamber, and a first fluid in the first fluid pipeline entering the suction chamber
Implementation Method 2
at least one flushing member used for continuously providing a third fluid to clean the suction chamber and the first fluid pipeline to generate a fixed flushing pressure or intermittently providing the third fluid to clean the suction chamber and the first fluid pipeline to generate a pulsed flushing pressure
Data Source
AI summary
A self-cleaning negative-pressure ejector at least comprises a suction chamber, a jet pipe and a flushing member. A side wall of the suction chamber has at least one suction port for communicating with a first fluid pipeline. An exit port of the jet pipe is disposed in the suction chamber and ejects a second fluid so that a negative pressure is generated in the suction chamber, a first fluid in the first fluid pipeline enters the suction chamber, and a first included angle is between a direction in which the first fluid being sucked into the suction chamber and an ejection direction of the second fluid. The flushing member optionally provides a third fluid to flush the suction chamber and/or the first fluid pipeline.