Trichlorosilane Reactor Heaters with Flange Gas Flow Control
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Solution Overview
Problem
Existing apparatuses for producing trichlorosilane face challenges with low heat efficiency and limited scalability due to inefficient heating methods, leading to reduced reaction efficiency and size limitations.
Innovation Solution
The apparatus features a reaction vessel with heaters disposed inside, each having an elongated heating element and a flange that narrows the gas passage, ensuring direct heat transfer and uniform gas flow, thereby improving heat efficiency and allowing for larger apparatus sizes without reducing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the heating element is disposed outside the reaction chamber, then the reaction chamber can be heated from outside, but the heat efficiency becomes low because heat is radiated in both inner and outer radial directions
Solution Approach 1:
Instead of placing the heating element outside the reaction chamber as in conventional designs, this patent inverts the arrangement by placing the heating element inside the reaction chamber. This inversion ensures that heat is radiated only in the outward radial direction to the reaction gas, eliminating the waste of heat radiating outward from an external heater and thereby improving heat efficiency.
2Loss of energy
If the heating element is disposed in the central position of the reaction vessel, then heat efficiency increases, but the outer diameter of the reaction chamber must increase to accommodate it, limiting scalability
Solution Approach 1:
Instead of using a single large central heating element that would increase the reaction chamber's outer diameter, this patent segments the heating function into multiple heating elements arranged around the periphery of the reaction chamber. Each heating element is positioned near the inner circumference, allowing heat to be efficiently transferred to the reaction gas without requiring a large central space, thus enabling scalable design.
3Productivity
If the reaction chamber size is increased to increase production capacity, then mass production is enabled, but the distance between the heating element and circumferential portion increases, reducing heat efficiency
Solution Approach 1:
This patent transitions from a single-point or central heating approach to a distributed peripheral heating arrangement. By placing multiple heating elements along the inner circumference of the reaction chamber, heat is delivered from multiple locations simultaneously, ensuring that even as the reaction chamber size increases for mass production, the heat efficiency is maintained across the entire reaction volume.
4Manufacturing precision
If the gas flows uniformly in the reaction chamber and heaters, then homogeneous heating is achieved, but without proper flow control structures, heterogeneous heating occurs, reducing reaction efficiency
Solution Approach 1:
This patent incorporates flow control structures such as partition walls or baffle plates within the reaction chamber to guide the reaction gas flow. These local structural modifications create specific flow paths that ensure the gas passes uniformly through all regions of the reaction chamber, including areas near the heating elements, thereby achieving homogeneous heating without requiring complex overall redesign.
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
This configuration enables high heat efficiency and uniform heating of the gas, enhancing the conversion rate of trichlorosilane production while allowing for increased apparatus size, facilitating mass production without heat efficiency loss.
Implementation Method 1
each of the heaters has a heating element that is elongated in a vertical direction and that generates heat upon electrification
Implementation Method 2
a passage of the raw gas formed between adjacent heaters is narrowed by the flange
Implementation Method 3
trichlorosilane can be produced by the conversion of silicon tetrachloride through a reaction of silicon tetrachloride and hydrogen
Data Source
AI summary
An apparatus for producing trichlorosilane, including: a reaction vessel that has a substantially cylindrical wall body, a top plate, and a bottom plate, where a reaction product gas is produced from a raw gas supplied to the reaction vessel through a gas introducing passage provided to the lower section of the cylindrical wall body; and a plurality of heaters that are disposed inside the reaction vessel to heat the raw gas, wherein each of the heaters has a heating element that is elongated in a vertical direction and generates heat by electrification, and a mount that is fixed to the bottom plate and supports the heating element; a flange is provided to intermediate height of the heating element such that the flange is arranged upper than the gas introducing passage and is elongated in horizontal direction; and a passage of the raw gas formed between adjacent heaters is narrowed by the flange.