Carbonic Acid Descaling via Reverse Osmosis Permeate
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Solution Overview
Problem
Conventional scale removal methods using strong mineral acids are hazardous, corrosive, and require disassembly of apparatus, generating hazardous waste and increasing energy consumption due to scale buildup in heat exchangers and condensers.
Innovation Solution
A scale removal system combining reverse osmosis-generated water permeate with pressurized carbon dioxide to form a pressurized carbonic acid feedstream, which is used to dissolve scale deposits without disassembling the apparatus, reducing corrosion risk and hazardous waste production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If strong mineral acids are used to remove scale, then scale removal effectiveness is improved, but apparatus corrosion risk increases and hazardous waste is generated
Solution Approach 1:
The invention changes the chemical parameters of the descaling agent from strong mineral acids to carbonic acid formed by dissolving CO2 in water. This parameter change maintains scale removal effectiveness while dramatically reducing corrosion risk and hazardous waste generation, as carbonic acid is a weak acid that decomposes into water and CO2
Solution Approach 2:
The invention converts the harmful effect of scale buildup (reducing heat transfer efficiency) into a beneficial process by using the same CO2 that can cause acidification in other contexts to create a gentle descaling agent. The CO2 that would otherwise be a waste product or hazard becomes the key to safe, effective scale removal
2Reliability
If strong mineral acids are used to remove scale, then scale removal effectiveness is improved, but hazardous waste water is generated requiring neutralisation and certified disposal
Solution Approach 1:
The invention converts the harmful strong acid descaling process into a beneficial environmentally-friendly process by using carbonic acid. The waste product of this process is not hazardous but rather water and CO2, eliminating the need for neutralisation and certified waste disposal while maintaining scale removal effectiveness
Solution Approach 2:
The invention changes the chemical composition parameters of the descaling solution from strong mineral acids to carbonic acid system. This parameter change fundamentally alters the waste stream from hazardous acid waste requiring certified disposal to non-hazardous water and CO2 that can be safely discharged or recycled
3Reliability
If apparatus is disassembled for scale removal, then access to scale deposits is improved, but process downtime increases
Solution Approach 1:
The invention uses hydraulic injection of carbonic acid solution through existing process lines to deliver the descaling agent directly to scale deposits without mechanical disassembly. This hydraulic approach maintains process continuity while achieving effective scale removal, eliminating the time loss associated with disassembly and reassembly
4Strength
If scale deposits are not removed, then apparatus structure is preserved, but energy consumption increases due to reduced cooling capability
Solution Approach 1:
The invention performs preliminary scale removal using carbonic acid injection before significant scale buildup occurs, preventing the insulating layer from developing enough to significantly increase energy consumption. This proactive approach maintains cooling efficiency and avoids the need for frequent, disruptive scale removal operations
Solution Approach 2:
The invention enables continuous or frequent low-intensity scale removal through carbonic acid injection during normal operation, maintaining optimal heat transfer efficiency continuously rather than allowing scale to accumulate and then performing intermittent intensive cleaning. This continuous action prevents energy consumption from increasing while preserving apparatus structure
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 system efficiently removes scale in situ, reducing energy consumption, safety risks, and waste generation, with recyclable carbonic acid that can be reused, minimizing downtime and disposal costs.
Implementation Method 1
a reverse osmosis generated water permeate feedstream
Implementation Method 2
pressurized carbon dioxide feedstream which combine to form a pressurized carbonic acid feedstream
Data Source
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AI summary
The present invention provides a system (100) for descaling apparatus. The system comprises: a water inlet feedstream (1); a reverse osmosis system (5) in fluid communication with the water inlet feedstream (1), in which the reverse osmosis system (5) produces a water permeate output feedstream (13); and a pressurised carbon dioxide feedstream (24). The pressurised carbon dioxide feedstream (24) and water permeate output feedstream (13) are arranged in use to combine to produce a pressurised carbonic acid input feedstream.