Distributor Pipe Branch Diameter Ratio for Uniform Wastewater Distribution
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In trickling filter systems, achieving uniform distribution of wastewater over the filter bed is challenging due to fluctuations in spraying strength, particularly under varying processing loads.
Innovation Solution
A distributor pipe design featuring a main pipe with branch pipes arranged on its cylindrical surface, where the pipe diameter ratio of branch pipes to the main pipe is between 0.2 and 0.8, and the branch pipes are positioned according to specific flow velocity and area ratios to ensure uniform distribution, with a predetermined flow velocity range of 0.5 to 5.0 m/s and a number of branch pipes between five to nine.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional rotary distributors or fixed nozzle distributors are used, then wastewater can be distributed over the filter bed, but uniform distribution is difficult to achieve due to fluctuation in spraying strength
Solution Approach 1:
The patent applies local quality by varying the pipe diameter ratio of branch pipes along the longitudinal direction of the main pipe. Branch pipes closer to the inlet have smaller diameter ratios (0.2-0.4) while those farther away have larger ratios (0.6-0.8), creating localized flow distribution that compensates for pressure drops and achieves uniform wastewater distribution across the filter bed
Solution Approach 2:
The patent changes the parameter of pipe diameter ratio along the length of the distributor pipe to maintain uniform spraying strength. By progressively increasing the branch pipe diameter ratio from inlet to outlet, the system compensates for the natural decrease in flow pressure, ensuring consistent wastewater distribution under varying processing loads
2Ease of manufacture
If branch pipes with small diameter ratio are used, then manufacturing is simpler, but uniform distribution cannot be achieved under varying flow conditions
Solution Approach 1:
Rather than using a uniform pipe diameter ratio throughout, the patent implements local quality by specifying different diameter ratios for different sections of the distributor pipe. This allows each section to be optimized for its specific flow conditions while maintaining overall manufacturing simplicity through standardized pipe sections
3Area of stationary object
If the number of branch pipes is increased, then distribution coverage is improved, but flow velocity control becomes more difficult
Solution Approach 1:
The patent controls flow velocity by changing the pipe diameter ratio parameter along the longitudinal direction. This progressive increase in diameter ratio compensates for the cumulative flow demand of multiple branch pipes, maintaining flow velocity within the optimal range of 0.5-5.0 m/s throughout the distributor pipe length
Data Source
AI summary
A distributor pipe includes: a main pipe including a cylindrical part; and a plurality of branch pipes communicating with the main pipe and arranged, on a cylindrical curved surface of the main pipe, side by side along a longitudinal direction of the main pipe. A pipe diameter ratio D1/D0 of a pipe diameter D1 of the branch pipe to a pipe diameter D0 of the main pipe is greater than 0.2 and less than 0.8, and the plurality of branch pipes are arranged according to: respective effluent flow ratios, at a time a liquid flows into the main pipe in a predetermined flow velocity range, determined in accordance with respective arrangement orders of the plurality of branch pipes along a direction in which the liquid flows and along the longitudinal direction of the main pipe; and respective areas of circular or hollow-circular sections allotted to the plurality of branch pipes.