Paddle-Discarding Sealed Cement Bucket for Radioactive Waste Solidification
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing paddle discarding fully-sealed stirring bucket cement solidification process faces issues such as non-uniform stirring, overflow of waste liquid, clamping stagnation of the stirring device, fracture of the stirring paddle shaft, and motor burnout due to inadequate sealing and unreasonable parameter settings.
Innovation Solution
A fully-sealed cement stirring and solidification bucket system with a stirring paddle that is discarded inside the steel bucket, featuring a sealed and rotatable connection, along with a breathing and exhaust device, and a method involving specific stages and parameters for cement and waste liquid injection and stirring, including dry ash stirring, initial and suspension stirring, and thorough mixing stages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a fully-sealed stirring bucket is used to prevent pollution, then environmental protection is improved, but stirring uniformity deteriorates due to inadequate sealing design
Solution Approach 1:
The bucket cover is divided into multiple sections with different sealing configurations: a first sealing structure for the stirring interface and a second sealing structure for the liquid injection interface. This segmentation allows each sealing area to be optimized for its specific function, ensuring both environmental protection and effective stirring operation.
Solution Approach 2:
Different sealing methods are applied to different locations on the bucket cover. The stirring interface uses a first sealing structure adapted for rotational movement, while the liquid injection interface uses a second sealing structure adapted for fluid injection. This local differentiation ensures that each sealing area provides the appropriate sealing performance for its specific operational requirements.
2Productivity
If high-speed stirring is applied to ensure mixing efficiency, then productivity is improved, but device reliability deteriorates due to clamping stagnation and fracture
Solution Approach 1:
The stirring paddle is designed with a dynamic connection structure that allows it to rotate freely around the stirring axis while maintaining sealed connection. This dynamic design enables high-speed stirring operations without causing clamping stagnation or fracture, as the paddle can adapt its position during rotation rather than being rigidly constrained.
Solution Approach 2:
A sealed connection structure acts as an intermediary between the stirring paddle and the bucket cover. This intermediary component transmits rotational motion while maintaining the sealed environment, preventing direct mechanical stress transmission that would cause clamping stagnation or fracture during high-speed operation.
3Manufacturing precision
If waste liquid is injected continuously to ensure complete mixing, then homogeneity is improved, but overflow occurs due to inadequate volume control
Solution Approach 1:
The liquid injection interface incorporates a feedback control mechanism that monitors the mixing process and adjusts the injection rate accordingly. This feedback system ensures that waste liquid is injected continuously enough to achieve complete mixing homogeneity while preventing overflow by adapting the injection rate to the actual mixing requirements.
Solution Approach 2:
The injection flow rate is dynamically adjusted based on mixing progress. The system changes the injection parameter from a fixed rate to a variable rate that responds to mixing conditions, ensuring complete homogeneity is achieved while preventing overflow by reducing the rate when the mixing process is nearly complete.
4Area of stationary object
If the stirring paddle shaft is made longer to reach the bottom, then mixing coverage is improved, but the risk of fracture increases
Solution Approach 1:
The stirring paddle shaft is segmented into multiple sections with reinforced connections. This segmentation allows the shaft to reach the bottom of the bucket for comprehensive mixing coverage while distributing mechanical stress across multiple connection points, reducing the risk of fracture at any single location.
Solution Approach 2:
The stirring paddle shaft is constructed using composite materials that combine high strength and flexibility. This composite construction enables the shaft to be sufficiently long for full mixing coverage while maintaining the strength and fracture resistance needed for durable operation under stress.
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
Ensures uniform mixing and solidification of radioactive waste liquid and cement without secondary radioactive waste liquid production or aerosol diffusion, preventing motor burnout and overflow, and ensuring the quality of the cement solidified body.
Implementation Method 1
stirring is a necessary condition for uniform distribution of cement and radioactive waste liquid
Implementation Method 2
this process adopts a paddle discarding and sealed mode, where stirring and curing of cement mortar in the bucket are always carried out in a fully-sealed state
Implementation Method 3
a breathing and exhaust device interface... arranged on the bucket cover
Data Source
AI summary
Disclosed are a paddle discarding fully-sealed cement stirring and solidification bucket and a liquid injection and stirring method. A stirring paddle, a bucket cover, and a stirring steel bucket are first assembled and conveyed to a feeding station for cover removal and cement filling; then the stirring steel bucket is conveyed to a stirring station; after a stirring power device, a waste liquid injection device, and a breathing and exhaust device are correspondingly connected to a stirring paddle drive connection end, a waste liquid injection interface, and a breathing and exhaust device interface, injection and stirring of radioactive waste liquid are carried out in a fully-sealed environment. In the present invention, the stirring paddle is discarded in the steel bucket, thereby avoiding the problems of secondary radioactive waste liquid produced by cleaning the stirring paddle and diffusion of radioactive aerosol in the stirring process.