Gas-Atomized Spray Evaporation for Clog-Resistant Oxide Production
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Solution Overview
Problem
Existing processes for preparing silicon dioxide and metal oxides face issues with product quality inhomogeneity and stability due to clogging of evaporators and poor reactant distribution, leading to interruptions and increased costs.
Innovation Solution
A process involving the direct spraying of a liquid raw material with a gas to form an aerosol, followed by complete evaporation and conversion to silicon dioxide or metal oxide in the presence of oxygen, without the use of a separate evaporator.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate evaporator is used to vaporize liquid raw material before introducing it into the flame, then the raw material can be converted to gaseous form for reaction, but the evaporator and supply lines become clogged with time by higher-boiling products or breakdown products
Solution Approach 1:
The invention removes the separate evaporator component from the system entirely. Instead of using an evaporator to vaporize the liquid raw material beforehand, the process introduces the liquid aerosol directly into the flame where vaporization and chemical reaction occur simultaneously. This extraction of the evaporator eliminates the clogging problem that plagues traditional systems.
Solution Approach 2:
The invention combines the vaporization function and the chemical reaction function into a single integrated process step. The liquid aerosol is introduced directly into the flame zone where it vaporizes and reacts simultaneously, merging two separate operations (evaporation and combustion) into one unified process that occurs in the flame environment.
2Reliability
If liquid raw material is introduced directly into the flame without pre-evaporation, then evaporator clogging is avoided, but poor distribution of the reactant in the reaction zone occurs
Solution Approach 1:
The invention uses a pneumatic system to generate and convey the liquid aerosol. A carrier gas (inert or reactive) is used to atomize and transport the liquid raw material as a fine aerosol stream directly into the flame. This pneumatic delivery mechanism ensures uniform distribution of the reactant throughout the reaction zone while maintaining process continuity.
Solution Approach 2:
The invention changes the physical state and delivery parameters of the raw material by converting it into an aerosol form. The liquid is atomized into fine droplets suspended in a carrier gas, creating a dispersed phase that can be evenly distributed in the flame environment, thereby improving product homogeneity while avoiding evaporator clogging.
3Productivity
If gaseous metal compound is produced in a separate evaporator and introduced into the flame, then the conversion to metal oxide can proceed, but the evaporator becomes clogged and process interruptions occur
Solution Approach 1:
The invention extracts and removes the evaporator component from the production system. By eliminating this separate vaporization step, the process avoids the recurring clogging and cleaning interruptions that reduce productivity. The liquid raw material is fed directly into the flame where it vaporizes in-situ, ensuring continuous operation.
Solution Approach 2:
The invention enables continuous operation by eliminating the bottleneck created by the evaporator. The direct aerosol injection method allows the production process to run continuously without periodic shutdowns for cleaning, maintaining uninterrupted conversion of metal compound to metal oxide and maximizing productivity.
4Manufacturing precision
If static mixing elements are used to achieve better mixing of gaseous components, then reaction homogeneity improves, but device complexity increases
Solution Approach 1:
The invention uses pneumatic mixing principles where the carrier gas itself serves as the mixing medium. The liquid aerosol is introduced into the flowing carrier gas stream, and the gas flow dynamics naturally distribute the reactants uniformly throughout the reaction zone, eliminating the need for complex static mixing elements.
Solution Approach 2:
The carrier gas performs multiple functions simultaneously: it atomizes the liquid, transports the aerosol, provides mixing, and may serve as a reactant. This self-service approach where the gas stream accomplishes mixing and transport without additional mixing components simplifies the overall device while maintaining reaction homogeneity.
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 stable and high-quality product production without interruptions, improving the robustness and reducing capital costs by preventing evaporator clogging and enhancing reactant distribution.
Implementation Method 1
spraying a liquid raw material comprising at least one silicon compound and/or a metal compound by mixing it with a gas to form an aerosol
Implementation Method 2
forming a gaseous reaction mixture from the aerosol obtained in step a) by complete evaporation
Implementation Method 3
converting the gaseous reaction mixture obtained in step b) to silicon dioxide and/or metal oxide in the presence of oxygen
Data Source
AI summary
The present invention relates to a process for preparing a metal oxide,comprising a) spraying a liquid raw material comprising at least one metal compound by mixing it with a gas to form an aerosol;b) forming a gaseous reaction mixture from the aerosol obtained in step a) by complete evaporation thereof;c) converting the gaseous reaction mixture obtained in step b) to metal oxide in the presence of oxygen.