Fixed Bed Counter-Current Regeneration Device for Ion Exchange Resin
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Solution Overview
Problem
Current ion exchange resin regeneration methods suffer from low efficiency, mechanical wear of the resin, and high desorption solution yield, leading to increased operating costs and complexity in the treatment of drinking water and municipal wastewater.
Innovation Solution
An ion exchange resin fixed bed counter-current regeneration device comprising a cyclone separator, regeneration reactor, fully mixed resin reactor, desorption solution storage tank, and regenerant storage tank, which uses counter-current regeneration and hydraulic forces to minimize mechanical stress and optimize resin regeneration, allowing for efficient desorption solution reuse.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If mechanical stirring is used to mix resin with regenerant, then regeneration can be completed, but the resin is prone to breakage and life span is reduced
Solution Approach 1:
The patent replaces mechanical stirring with hydraulic mixing. The regenerant is introduced at the bottom of the reactor and mixes with the resin bed through fluid flow and hydraulic forces, eliminating mechanical contact that causes resin breakage while maintaining effective mixing for regeneration.
Solution Approach 2:
The system uses hydraulic forces to achieve resin-regenerant contact. Regenerant solution flows through the resin bed from bottom to top, using fluid dynamics to distribute the regenerant uniformly throughout the resin without mechanical agitation, thus preserving resin integrity.
2Productivity
If mechanical stirring is used to blend resin and regenerant, then regeneration occurs, but dead spaces are formed where contact between resin and regenerant is insufficient
Solution Approach 1:
The patent replaces mechanical stirring with hydraulic mixing. The regenerant is introduced at the bottom of the reactor and mixes with the resin bed through fluid flow and hydraulic forces, eliminating mechanical contact that causes resin breakage while maintaining effective mixing for regeneration.
Solution Approach 2:
The system employs dynamic fluid flow to achieve uniform distribution of regenerant throughout the resin bed. The flowing regenerant creates dynamic contact patterns that penetrate all regions of the resin, eliminating dead spaces that would occur with static mechanical stirring.
3Quantity of substance
If direct pumping of resin and water to regeneration reactor is used, then resin concentration is less than 20%, but more than 80% of water body needs to be drained
Solution Approach 1:
The patent extracts and removes excess water from the resin slurry before introducing it to the regeneration reactor. A water removal device is employed to separate and drain the majority of the water body, concentrating the resin to a higher solids content before regeneration, thus reducing the volume of water that needs to be processed and disposed of.
Solution Approach 2:
The system performs preliminary water removal before the regeneration process. By extracting excess water in advance, the resin is pre-concentrated, which reduces the subsequent water drainage requirement during and after regeneration, improving overall water efficiency.
4Duration of action of moving object
If resin is drained for a long time, then regeneration process is completed, but regeneration efficiency is low
Solution Approach 1:
The patent replaces mechanical stirring with hydraulic mixing. The regenerant is introduced at the bottom of the reactor and mixes with the resin bed through fluid flow and hydraulic forces, eliminating mechanical contact that causes resin breakage while maintaining effective mixing for regeneration.
Solution Approach 2:
The system maintains continuous contact between regenerant and resin throughout the regeneration process. The hydraulic flow ensures continuous penetration and distribution of regenerant through the resin bed, maximizing the effective contact time and regeneration efficiency without requiring prolonged drainage periods.
5Quantity of substance
If regenerant is used one single time, then desorption solution is excessive, but desorption solution disposal difficulty increases and operating costs rise
Solution Approach 1:
The patent implements a regenerant recovery and reuse system. The spent regenerant solution is collected after the regeneration process and treated for reuse in subsequent regeneration cycles. This reduces the volume of fresh regenerant needed, minimizes disposal requirements, and lowers operating costs through resource recovery.
Solution Approach 2:
The system incorporates feedback mechanisms to monitor and control regenerant usage. By tracking the effectiveness of regenerant over multiple cycles and adjusting dosing accordingly, the system optimizes regenerant consumption, extends its useful life, and reduces the volume requiring disposal while maintaining regeneration efficiency.
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 device enhances resin regeneration efficiency, extends resin longevity, reduces desorption solution yield, and lowers operational costs by using a counter-current regeneration design and hydraulic separation, facilitating comprehensive and systematic control of the resin regeneration process.
Implementation Method 1
The cyclone separator separates water and resin through centrifugal force, and the upper part of the cyclone separator is connected to the fully mixed resin reactor through a feed inlet
Implementation Method 2
a resin bed and a resin filter are sequentially arranged from top to bottom inside the regeneration reactor... The regeneration reactor is further provided with a regenerant outlet on one side, the regenerant outlet is connected to the desorption solution storage tank
Implementation Method 3
A resin inlet and a regenerant inlet are arranged at the bottom of the regeneration reactor... the two ends of the resin filter are respectively connected to a fresh water outlet and the desorption solution storage tank
Data Source
AI summary
The invention discloses a fixed bed counter-current regeneration device for ion exchange resin and the method of use, relates to the field of ion exchange resin regeneration. The device comprises a cyclone separator, a regeneration reactor, a fully mixed resin reactor, a desorption solution storage tank, and a regenerant storage tank, wherein the cyclone separator is placed on top of the regeneration reactor, the upper part of the cyclone separator is connected to the fully mixed resin reactor. A resin inlet is provided at the bottom of the cyclone separator, a resin bed and a resin filter are arranged inside the regeneration reactor, a resin outlet and a regenerant inlet are arranged at the bottom of the regeneration reactor, the resin outlet is connected to the fully mixed resin reactor, the regenerant inlet is connected to the desorption solution storage tank and the regenerant storage tank, respectively, one side of the regeneration reactor is further provided with a regenerant outlet, and the regenerant outlet is connected to the desorption solution storage tank. The invention effectively improves resin regeneration efficiency via separator and counter-current, reduces the desorption solution yield, prevents mechanical wear and tear of the resin, and can be used as part of large-scale ion exchange resin applications.