Controlled-type, non-decomposable, high-concentration process water freeze-separation apparatus
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Solution Overview
Problem
Conventional process water freeze-separation apparatuses face challenges with corrosion of copper refrigerant tubes, difficulty in controlling supercooling and fine ice seed water generation, and high power consumption due to direct contact with process water containing contaminants.
Innovation Solution
The apparatus employs stainless antifreeze tubes and copper refrigerant tubes in a cell and tube form to prevent direct contact, controlling retention time and outflow to manage supercooling, ice seed water generation, and ice slurry formation, while optimizing refrigerant circulation flow to reduce power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If copper refrigerant tubes are used in direct contact with process water, then heat exchange efficiency is improved, but corrosion occurs reducing tube lifespan
Solution Approach 1:
The patent introduces a stainless steel protective tube as an intermediary layer between the copper refrigerant tube and the corrosive process water. The copper tube remains intact for efficient heat exchange while the stainless steel layer blocks direct contact with contaminants, preventing corrosion and extending tube lifespan.
Solution Approach 2:
The patent employs a composite structure combining copper and stainless steel materials. The inner copper layer provides superior thermal conductivity for heat exchange, while the outer stainless steel layer provides corrosion resistance, creating a material composite that simultaneously achieves both heat exchange efficiency and durability.
2Productivity
If cooling rate is increased to form ice crystals faster, then productivity is improved, but control over supercooling and fine ice seed generation becomes difficult
Solution Approach 1:
The patent employs dynamic control of the cooling process by adjusting the cooling rate in stages. The system transitions from a faster initial cooling phase to promote ice crystal formation to a controlled slower phase for precise supercooling management, allowing both high productivity and precise control to be achieved at different time points in the process.
3Temperature
If refrigerant circulation flow is increased to improve cooling performance, then cooling efficiency is improved, but power consumption increases
Solution Approach 1:
The patent optimizes refrigerant circulation by adjusting flow parameters and circulation patterns. The system modifies refrigerant flow rate, pressure, and distribution to achieve efficient heat transfer while minimizing the energy required for circulation, balancing cooling performance with power consumption.
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 effectively prevents corrosion, extends the lifespan of copper refrigerant tubes, enhances stability, and reduces power consumption while ensuring precise control over supercooling and ice slurry formation, ensuring safe processing of acid or alkaline wastewater without harmful gas or salt generation.
Implementation Method 1
a condenser stainless antifreeze tube (1-2) formed in a cell and tube form, and a condenser copper refrigerant tube (1-3) formed in a cell and tube form inside the stainless antifreeze tube (1-2) to block direct contact between circulating water flowing into the condenser (1-1) and the condenser copper refrigerant tube (1-3)
Implementation Method 2
an evaporator stainless antifreeze tube (2-2) formed in a form of a cell and tube inside, and an evaporator copper refrigerant tube (2-3) formed in a cell and tube form inside the evaporator stainless antifreeze tube (2-2) to block direct contact between circulating water flowing into the evaporator (2-1) and the evaporator copper refrigerant tube (2-3)
Implementation Method 3
an inflow water retention time is controlled by formation of circulating water between the evaporator (2-1) and a freeze separation tank (3-1) and circulating water between an ejector (7-1) and the freeze separation tank (3-1) and control of an outflow water amount from an inflow water tank (14-1), to thereby control supercooling, fine seed water generation, and ice slurry formation and melting
Implementation Method 4
to thereby control supercooling, fine seed water generation, and ice slurry formation and melting
Implementation Method 5
a condenser (1-1) having therein a condenser stainless antifreeze tube (1-2) formed in a cell and tube form, and a condenser copper refrigerant tube (1-3) formed in a cell and tube form inside the stainless antifreeze tube (1-2)
Implementation Method 6
circulating water between an ejector (7-1) and the freeze separation tank (3-1)
Data Source
AI summary
A controlled-type recalcitrant high-concentration freeze-separation apparatus, includes: a condenser having therein a condenser stainless antifreeze tube formed in a cell and tube form, and a condenser copper refrigerant tube formed in a cell and tube form inside the stainless antifreeze tube to block direct contact between circulating water flowing into the condenser and the condenser copper refrigerant tube; and an evaporator having therein an evaporator stainless antifreeze tube formed in a form of a cell and tube inside, and an evaporator copper refrigerant tube formed in a cell and tube form inside the evaporator stainless antifreeze tube to block direct contact between circulating water flowing into the evaporator and the evaporator copper refrigerant tube.