Explosion Cleaning Device for Incinerator Deposit Removal
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Solution Overview
Problem
Conventional cleaning methods for incinerators and combustion boilers are inefficient, requiring shutdown, causing damage, and are costly due to the need for explosives or cumbersome gas mixture systems, which also result in residues and operational disruptions.
Innovation Solution
A cleaning device using a gaseous explosive mixture introduced through a feed pressure line, where the mixture is ignited to create a high-pressure explosion wave that removes deposits without the need for explosives or cumbersome containers, allowing for in-operation cleaning and reduced downtime.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional cleaning methods (boiler rapping, steam jets, water jet blowers, sandblasting) are used on shut-down plants, then cleaning can be performed, but the system downtime costs due to loss of production and income are high and cleaning takes several days or weeks
Solution Approach 1:
The patent replaces conventional mechanical cleaning methods (steam jets, water jets, sandblasting) with explosion technology. Explosive charges are placed inside the container and detonated to generate shock waves that remove deposits from inner walls, enabling cleaning to be completed in hours rather than days and allowing the system to remain operational or be cleaned while still hot.
Solution Approach 2:
The patent changes the physical state and delivery method of the cleaning agent. Instead of using conventional mechanical or thermal cleaning agents, explosive charges are introduced in a controlled manner, detonated to create high-pressure shock waves, and then the container is ventilated to remove explosive gases, transforming the cleaning process into a rapid, high-energy event that dramatically reduces cleaning time.
2Productivity
If explosives are used for cleaning (method in EP 1 067 349), then cleaning time is significantly reduced and cleaning can occur while the incinerator is in operation, but high costs for explosive material and security measures are required
Solution Approach 1:
The patent uses inexpensive, readily available explosive charges (such as aerosol cans filled with flammable propellant) instead of expensive specialized explosives. These disposable charges are introduced into the container, detonated for cleaning, and then the container is ventilated to remove residues, eliminating the need for expensive security systems required for storing and handling traditional explosives.
Solution Approach 2:
The patent employs pneumatic methods to introduce explosive charges into the container using pressurized gas delivery systems. The aerosol charges are sprayed or injected into the container through nozzles, and after detonation, the explosive gases are removed using ventilation systems, replacing the need for complex mechanical handling and storage systems for traditional explosives.
3Ease of operation
If container shells are used to contain explosive gas mixtures (method in EP 1 362 213 B1), then handling of explosives is simplified, but the filling process is slow and the container shell must be attached and detached for each cleaning process
Solution Approach 1:
The patent extracts the explosive charge from a separate container shell and introduces it directly into the container to be cleaned in gaseous or aerosol form. This eliminates the need to attach and detach container shells for each cleaning process, as the explosive is delivered through pneumatic injection or spraying, significantly reducing preparation time while maintaining safety through controlled delivery and ventilation.
Solution Approach 2:
The patent uses pneumatic systems to deliver explosive charges directly into the container without requiring physical container shells. Pressurized gas injectors or spray nozzles introduce the explosive aerosol into the container, and ventilation systems remove the gases after detonation, eliminating the time-consuming process of attaching and detaching container shells for each cleaning operation.
4Speed
If the explosive mixture is introduced at high speed, then the cleaning process is faster, but the mixture contracts due to negative pressure and does not expand properly
Solution Approach 1:
The patent introduces the explosive charge into the container before detonation, allowing it to distribute and expand throughout the container space in advance. The pneumatic delivery system introduces the aerosol charge at controlled speeds that allow proper mixing and distribution, and the container is then sealed or closed to maintain pressure during the brief interval before detonation, ensuring the explosive mixture is properly formed and positioned for effective cleaning.
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 method enables targeted, efficient, and cost-effective cleaning of narrow areas without residues, reducing operational disruptions and costs by using a controlled gaseous mixture that can be ignited in situ, improving the cleaning process's speed and safety.
Implementation Method 1
A cleaning device using a gaseous explosive mixture introduced through a feed pressure line, where the mixture is ignited to create a high-pressure explosion wave that removes deposits
Implementation Method 2
The heating surface caking is blasted off by the force of the detonation and by the wall vibrations generated by the shock waves
Data Source
Figure 1
Figure 2~17b
Figure 4~19b
AI summary
The invention relates to a cleaning device (51) for removing deposits from the interiors (71) of containers and systems (70) using explosion technology. An explosive, gaseous mixture is provided by the cleaning device (51) and detonated for the purpose of cleaning the interior (71). The explosion pressure wave is directed into the interior (71) via an outlet opening (69) in the cleaning device (51). The explosive mixture, or its gaseous components, are thereby introduced at high velocity from pressure vessels (22, 24) into a receiving chamber of the cleaning device (51).