Dust Collector Diffuser Reduces Wear in Compact Frames
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Solution Overview
Problem
High flow rates of dust-laden gas in coal gasification furnaces cause wear on dust collection unit surfaces due to Karman vortex-induced vibration, leading to corrosion and damage, especially when dust concentration is high, and increasing the size of the dust collector frame is uneconomical.
Innovation Solution
A dust collector design featuring a tube plate with a gas introduction pipe and diffuser that slows down gas flow using a downflow direction, a diffuser with a specific outlet to inlet diameter ratio and cone angle, and additional gas flow dispersing units to reduce impact and wear, while maintaining a compact frame size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the flow rate of produced gas is increased to maintain compact frame size, then the size of dust collector frame is decreased, but wear on dust collecting unit increases due to dust collision
Solution Approach 1:
A flow rate dispersing unit is introduced as an intermediary component between the gas introduction pipe and the dust collecting unit. This mediator distributes the high-velocity gas flow into multiple directions, preventing direct impact on the dust collecting unit while maintaining compact overall dimensions. The dispersing unit acts as a buffer that converts concentrated harmful flow into distributed harmless flow patterns.
Solution Approach 2:
The gas flow is segmented into multiple streams by the flow rate dispersing unit, which divides the single high-velocity flow path into several lower-velocity paths. This segmentation reduces the impact velocity of dust particles on any single point of the dust collecting unit, thereby reducing wear while maintaining system compactness.
2Object-affected harmful factors
If the flow rate of produced gas is decreased to reduce wear on dust collecting unit, then wear is decreased, but the size of dust collector frame increases
Solution Approach 1:
The flow rate dispersing unit redirects gas flow into different spatial dimensions (upward, downward, leftward, rightward) rather than allowing linear progression. This dimensional redistribution enables the system to maintain compact linear footprint while effectively reducing the velocity of gas-dust mixture impacting the dust collecting unit through multi-directional flow paths.
3Quantity of substance
If dust concentration in produced gas is high, then more dust is collected, but wear on protective coating increases leading to corrosion
Solution Approach 1:
The flow rate dispersing unit serves as a protective intermediary that shields the protective coating on the dust collecting unit from direct exposure to high-concentration dust-laden gas. By distributing the flow, it reduces the kinetic energy of dust particles, allowing high dust concentration to be collected without proportionally increasing wear and corrosion rates.
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 solution effectively decreases the flow rate of dust-laden gas, reduces wear on the dust collection unit, and minimizes the size of the dust collector frame, ensuring efficient operation and cost-effectiveness.
Implementation Method 1
a diffuser being provided at the opening end portion of the gas introduction pipe
Implementation Method 2
the diameter of the gas introduction pipe may be increased, at an upper portion 121 of the gas introduction pipe 120
Implementation Method 3
supplying the gas to the dust collecting unit 17 in a downflow direction
Implementation Method 4
a dust collection pipe 112 that feeds the gas 104 from outside to inside and removes the dust 105 on a surface thereof
Data Source
Figure 1
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AI summary
A dust collector that collects dust (12) in gas (11) and purifies the gas (11) includes a tube plate (16) being provided in a dust collector frame (13) that separates an interior into a gas introduction chamber (14) and a gas discharge chamber (15), a plurality of dust collection pipes (17) being hung from the tube plate (16) that feeds the gas (11) from outside to inside and removes the dust (12) on a surface thereof, a gas introduction pipe. (18) being provided in the gas introduction chamber (14) that includes a gas opening end portion (18a) positioned near the tube plate (16), and supplies the gas (11) to the dust collection pipes (17) in a downflow direction, a diffuser (19) being provided at the opening end portion (18a) of the gas introduction pipe (18), and a gas discharging unit (21) being provided in the gas discharge chamber (15) that discharges purified gas (20).