Ball Mill Grinding Cylinder for Dioxin Removal
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Solution Overview
Problem
Existing processing apparatuses for fly ash from domestic waste incineration require additional thermal decomposition steps and have low efficiency in removing dioxin, necessitating a more effective method for dioxin removal.
Innovation Solution
A ball mill processing apparatus with a grinder, heating body, and air filtering system, where the grinding cylinder is heated to 300-500°C to thermally decompose dioxin, and sieve pores facilitate efficient grinding and separation, with activated carbon plates absorbing remaining dioxin traces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If existing processing apparatus processes fly ash preliminarily, then the fly ash can be prepared for treatment, but an extra incinerator is needed to thermally decompose dioxin, resulting in tedious steps and low processing efficiency
Solution Approach 1:
The patent combines the grinding function and thermal decomposition function into a single integrated ball mill device. The grinding cylinder serves both as the grinding chamber and as the heating zone, eliminating the need for separate incinerators and preprocessing equipment. This merging of functions directly resolves the technical contradiction by reducing device complexity while maintaining or improving processing efficiency.
Solution Approach 2:
The ball mill is designed with multi-functionality, performing both mechanical grinding and thermal decomposition of dioxin within the same device. The grinding cylinder can be heated to high temperatures while simultaneously containing grinding media and fly ash, allowing the single device to accomplish multiple treatment steps that previously required separate equipment.
2Adaptability or versatility
If a ball mill is used for grinding, then grinding function is provided, but it cannot thermally decompose dioxin without additional heating equipment
Solution Approach 1:
The heating system is integrated within the grinding cylinder structure. Heating elements are positioned inside or in direct contact with the grinding cylinder, allowing thermal energy to be applied directly to the grinding zone. This combination of grinding and heating functions in one device achieves functional versatility without adding separate heating equipment.
Solution Approach 2:
The grinding cylinder acts as an intermediary component that transfers both mechanical energy (through grinding media) and thermal energy (through integrated heating elements) to the fly ash. This intermediary structure enables the ball mill to perform both grinding and thermal decomposition functions simultaneously.
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 apparatus efficiently decomposes and removes dioxin from fly ash, improving processing efficiency and ensuring complete dioxin treatment through high-temperature grinding and air filtration.
Implementation Method 1
the grinding cylinder is located in the heating body that is used for heating the grinding cylinder... efficiently decomposes and removes dioxin from fly ash... through high-temperature grinding
Implementation Method 2
the heating body includes a housing and an induction coil arranged in the housing... the grinding cylinder is located in the induction coil
Implementation Method 3
a cooling body is arranged in the discharging port... used for cooling the processed fly ash
Implementation Method 4
activated carbon plates absorbing remaining dioxin traces
Data Source
AI summary
A processing apparatus for removing dioxin in fly ash from domestic waste incineration by using a ball mill includes a grinder as well as a feeding body and a discharging body that are separately arranged at both ends of the grinder. In the present disclosure, an induction coil is electrified by arranging a heating body to generate an alternating magnetic field such that eddies generate on an inner wall of a grinding cylinder in the induction coil, the grinding cylinder is heated by the energy of these eddies, making a grinding ball thermally desorb and decompose a harmful component, that is, dioxin in the fly ash through a high temperature when grinding the fly ash from the domestic waste incineration since a temperature in the grinding cylinder reaches 300-500° C. during grinding.