Acute-Angle Spray Nozzles for Compact Exhaust Gas Scrubber
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Solution Overview
Problem
Existing exhaust gas processing apparatuses using cyclone scrubbers face limitations in removal rate due to insufficient contact surface area and contact time between exhaust gas and absorbing liquid, necessitating increased nozzle numbers and larger apparatus sizes.
Innovation Solution
The apparatus features spray nozzles installed at an acute angle relative to the branch pipes, extending the distance between the nozzle spray ports and the tower perimeter, thereby increasing contact surface area and contact time, and using hollow cone nozzles to maintain droplet formation and prevent blockages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If spray nozzles are disposed perpendicularly to branch pipes (conventional configuration), then the structure is simple and easy to manufacture, but the contact surface area between exhaust gas and absorbing liquid is insufficient and contact time is short
Solution Approach 1:
The patent changes the installation angle parameter of spray nozzles from the conventional perpendicular (90 degrees) to an acute angle (30-60 degrees) relative to the branch pipe. This parameter change causes the spray mist to be directed more toward the center of the cyclone scrubber, increasing both the contact surface area and contact time between absorbing liquid and exhaust gas, thereby improving the removal rate of harmful substances
2Productivity
If the number of spray nozzles is increased to achieve desired removal rate, then the contact properties improve, but the size of the cyclone scrubber must be increased
Solution Approach 1:
By changing the nozzle installation angle to an acute angle, the spray mist is directed toward the center region where gas flow velocity is higher and residence time is longer. This parameter change improves contact properties without requiring additional nozzles or increased scrubber volume
Solution Approach 2:
The patent optimizes the spatial distribution of spray mist by adjusting the angle in the horizontal plane, causing the liquid to be sprayed toward the central axis rather than radially outward. This dimensional optimization of spray direction improves contact efficiency within the existing volume
3Area of stationary object
If spray nozzles are directed radially outward, then the spray pattern covers the perimeter, but the flight distance of absorbing liquid droplets is short and contact time is insufficient
Solution Approach 1:
The installation angle parameter is changed from radial outward direction to an acute angle toward the center. This causes the spray mist to travel a longer flight distance through the high-velocity gas flow region, increasing contact time while still maintaining adequate coverage of the internal space
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 enhances the removal rate of harmful substances while reducing the number of nozzles and apparatus height, achieving a compact design and improved efficiency.
Implementation Method 1
spray nozzles which spray liquid supplied from the branch pipes; the spray nozzles are installed such that an angle formed between the center line of the spray region of the spray nozzles and the lengthwise direction of the branch pipes is an acute angle
Implementation Method 2
absorbing tower main body in which an internal space is formed... for absorbing gas by creating contact between gas and liquid
Implementation Method 3
gas that revolves up from the bottom of a cylindrical tower... a gas supply apparatus which introducing gas into the absorbing tower main body
Data Source
Figure 1
Figure 2A
Figure 2B
AI summary
There is provided an exhaust gas processing apparatus which improves the removal rate of harmful substances and also achieves a compact size. An exhaust gas processing apparatus (10) absorbing gas by creating contact between gas and liquid includes: an absorbing tower main body (11) in which an internal space is formed; a spray apparatus (12) which sprays liquid in a prescribed region in an up/down direction of the internal space; and a gas supply apparatus (13) which introduces gas into the absorbing tower main body (11), wherein the spray apparatus (12) includes: a trunk pipe (12b) which extends in the up/down direction in the prescribed region of the internal space; branch pipes (12c) which are connected to the trunk pipe (12b) and extend towards the inner wall of the absorbing tower main body (11) ; and spray nozzles (12d) which spray liquid supplied from the branch pipes (12c), wherein the spray nozzles (12d) are installed such that an angle formed between the center line of the spraying region of the spray nozzle (12d), and the lengthwise direction of the branch pipe (12c) is an acute angle.