Biocide Production via Real-Time ORP and Conductivity Control
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Solution Overview
Problem
Existing methods for producing biocides, such as those involving sodium hypochlorite and ammonium salts, face challenges with chemical instability and rapid decomposition, leading to inefficiencies and variable product quality due to pH sensitivity and the need for excess reagents, which complicates maintaining the equimolar ratio and optimal yield without degradation.
Innovation Solution
A method and apparatus that monitor control parameters like oxidation-reduction potential (ORP), conductivity, and oxygen saturation to determine the maximum yield of biocide production without degradation, adjusting the flow rates of sodium hypochlorite and ammonium salt solutions to maintain equimolarity and optimize biocide production, using sodium hypochlorite and ammonium salts like ammonium carbonate or carbamate, and incorporating a control unit to manage these parameters in real-time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If sodium hypochlorite and ammonium salt solutions are mixed to produce biocide, then biocide yield is improved, but chemical stability deteriorates due to rapid decomposition
Solution Approach 1:
The patent prepares ammonium salt solution in advance with controlled concentration (18-28%) and keeps it ready for mixing. The hypochlorite solution is also prepared beforehand at specific concentrations (4000-7000 ppm). This preliminary preparation ensures that when mixing occurs, the reaction proceeds efficiently to maximum yield while the pre-controlled concentrations prevent excessive decomposition.
Solution Approach 2:
The patent employs real-time monitoring of control parameters (pH, ORP, conductivity, temperature) during the mixing process. Based on feedback from these parameters, the system adjusts the mixing rate and conditions to maintain optimal equimolar ratios. This feedback control ensures maximum biocide yield is achieved while preventing degradation from improper mixing conditions.
2Productivity
If excess reagents are used to maintain equimolar ratio, then biocide yield is improved, but device complexity increases due to need for precise control
Solution Approach 1:
The patent specifies precise concentration ranges for input solutions (hypochlorite at 4000-7000 ppm, ammonium salt at 18-28%) and uses these fixed parameters to simplify the mixing control. By controlling the input parameters rather than continuously adjusting the mixing ratio, the system achieves equimolar reaction with simpler control logic, reducing device complexity while maintaining high yield.
Solution Approach 2:
The concentrations of both hypochlorite and ammonium salt solutions are predetermined and prepared in advance within specific ranges. This preliminary setting of concentrations means that during mixing, the system only needs to control the flow rates and timing, not the concentrations themselves, significantly simplifying the control system while ensuring equimolar reaction for maximum yield.
3Stability of the object's composition
If pH is controlled to prevent degradation, then biocide stability is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent controls pH within a broad range of 6.5-8.5 rather than requiring precise control at a single value. This parameter range approach maintains biocide stability by keeping pH away from degradation-prone extremes while reducing the precision requirements for pH control equipment and operation, making the process more manufacturable.
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 approach ensures the production of biocides at the highest yield with minimal degradation, maintaining equimolarity and optimizing chemical stability, thereby improving the efficiency and consistency of biocide production, even under changing conditions.
Implementation Method 1
providing a solution of a hypochlorite oxidant... providing a solution of an ammonium salt... mixing a remainder of said solution of a hypochlorite oxidant with said ammonium salt dilution
Data Source
Figure 1
AI summary
A method and apparatus for producing a biocide from a hypochlorite oxidant and an ammonium salt are provided. The method includes monitoring a control parameter to optimize the ratio between the hypochlorite oxidant and the ammonium salt. The control parameter may be oxidation-reduction potential, conductivity, induction or oxygen saturation.