Absorbent Circulation Path Clogging Prevention
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Solution Overview
Problem
Wet type flue gas desulfurization apparatuses face clogging issues due to accumulated scales and impurities in the absorbent circulation path, leading to decreased desulfurization efficiency and instability in operation, requiring frequent maintenance and shutdowns for cleaning.
Innovation Solution
The apparatus incorporates a bypass pipe with a tank containing a perforated plate and auxiliary meshed portion to collect scales and impurities, along with restriction orifices and a flow rate control valve to manage the absorbent flow, allowing for easy maintenance and continuous operation without shutting down the system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a mesh or grinding mechanism is added to collect and ground scales, then desulfurization stability is improved, but device complexity increases and maintenance difficulty increases
Solution Approach 1:
The patent extracts the harmful scales from the circulation path by introducing a separate collection tank connected via a bypass pipe. The tank with perforated plate and auxiliary meshed portion captures scales outside the main circulation loop, preventing them from accumulating in nozzles and pipes while avoiding the need to add complex grinding mechanisms to the circulation path itself.
Solution Approach 2:
The collection tank acts as an intermediary device between the circulation path and the scales. It provides a dedicated space where scales can be collected and removed without directly interfering with the circulation system, thereby simplifying the overall device structure compared to integrating grinding mechanisms into the circulation path.
2Reliability
If maintenance operations are performed to remove accumulated scales, then clogging is prevented, but operation continuity is lost due to shutdown requirements
Solution Approach 1:
The patent implements preliminary action by providing easy access to the collection tank through the access port during normal operation. This allows scales to be removed before they can cause clogging in the circulation path, enabling maintenance to be performed without shutting down the apparatus and thus maintaining operation continuity.
3Area of stationary object
If the circulation path is made narrow to save space, then device footprint is reduced, but maintenance difficulty increases due to inaccessibility
Solution Approach 1:
The patent segments the scales collection function from the main circulation path by introducing a separate tank connected via bypass pipe. This allows the collection function to be spatially separated and accessed independently through the access port, while the main circulation path can remain compact. The segmentation enables easy maintenance of the collection function without requiring access to narrow spaces within the circulation path.
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 prevents clogging, ensures stable operation, and facilitates easy maintenance by allowing the removal of accumulated scales and impurities without stopping the apparatus, thereby maintaining continuous desulfurization efficiency.
Implementation Method 1
the absorbent that freely falls inside the tank passes through the transmission holes of the perforated plate
Data Source
AI summary
A wet type flue gas desulfurization apparatus desulfurizes flue gas existing inside an absorption tower by causing the flue gas to come into gas-liquid contact with an absorbent, and the absorbent is fed through a header pipe and sprayed through nozzles. In the apparatus, the absorbent accumulated inside the absorption tower is fed to the nozzles to circulate in the absorption tower. The apparatus includes: a bypass pipe feeding the absorbent through the nozzles from a downstream of the nozzles into the absorption tower; a tank arranged at an intermediate location on the bypass pipe; a perforated plate arranged inside the tank; and an access port opening on a side surface of the tank above the perforated plate to communicate between an inside and an outside of the tank. The absorbent that freely falls and passes through the perforated plate while scales or impurities are collected above the perforated plate.