The Double-Layer Mixing Tank is an advanced stainless-steel vessel specially designed for temperature-controlled mixing, blending, and formulation of liquid materials. It is widely used in the beverage, dairy, food, brewing, pharmaceutical, and chemical industries, where accurate temperature control and uniform mixing are essential.
The tank consists of an inner tank, an outer shell, and an insulating layer in between. The insulation—made of polyurethane foam or rock wool—effectively maintains the desired temperature of the product. The outer jacket enables circulation of cooling or heating media (such as chilled water, glycol, or steam), ensuring the product remains at the optimal process temperature during mixing, reaction, or storage.
The inner surface is precisely polished to a mirror finish (Ra ≤ 0.4 μm) to prevent product residue and bacterial growth, fully meeting GMP, FDA, and food hygiene standards.
Main Features
● Integrated Mixing & Temperature Control
The tank combines mechanical mixing with precise temperature regulation. The outer jacket allows circulation of hot or cold media for heating, cooling, or constant-temperature operation—ideal for processes like juice blending, milk pasteurization, or syrup mixing.
● High-Efficiency Agitator Options
Multiple agitator configurations are available:
o Anchor or frame agitator for high-viscosity materials
o Propeller or turbine agitator for low-viscosity liquids
o Optional bottom-mounted homogenizer for fine emulsification and dissolution
Agitator speed can be controlled by frequency converter (VFD) to ensure stable and uniform mixing under different viscosities and process conditions.
● Thermal Insulation Structure
The insulation layer between the inner and outer shells minimizes heat loss and energy consumption. This ensures temperature stability during long processing periods.
● Sanitary and Durable Design
The tank is built from SUS304 or SUS316L stainless steel, resistant to corrosion and easy to clean. Welds are ground and polished, leaving no dead corners for contamination.
● User-Friendly Control System
Optional PLC + HMI control system enables automatic monitoring of temperature, mixing speed, and time, providing precise and repeatable production parameters.
Detailed Structure Description
1. Inner Tank:
Food-grade stainless steel (SUS304/316L), with sanitary polishing and rounded corners.
2. Jacket Layer:
Can be full-jacket, half-pipe coil, or dimple jacket type, allowing circulation of cooling or heating media (glycol, cold water, hot water, or steam).
3. Insulation Layer:
Polyurethane foam or rock wool, providing superior thermal retention and energy efficiency.
4. Outer Shell:
Brushed or mirror-polished stainless-steel finish for aesthetic appearance and protection.
5. Agitator System:
Top-mounted or side-mounted motor with gearbox, customizable blade structure, VFD control for variable speed.
6. Optional Components:
Load cells (for weighing), temperature sensor, pressure gauge, sight glass, level indicator, sampling valve, CIP spray ball, and control cabinet.
Technical Parameters (Customizable)
| Item | Specification |
| Capacity | 100 L – 30,000 L |
| Material | SUS304 / SUS316L |
| Structure | Double-layer with insulation |
| Insulation Material | Polyurethane / Rock wool |
| Jacket Type | Dimple / Half-pipe / Full jacket |
| Agitator Type | Anchor / Frame / Propeller / Turbine / Homogenizer |
| Agitator Speed | 36–85 rpm (VFD adjustable) |
| Heating / Cooling Medium | Steam / Hot water / Chilled water / Glycol |
| Temperature Range | -20°C – 120°C |
| Surface Finish | Internal Ra ≤ 0.4 μm; External Matte or Mirror |
| Control System | Manual / Semi-automatic / PLC + HMI |
| Pressure Rating | Atmospheric or Low-pressure type |
| CIP Connection | Sanitary quick coupling / Tri-clamp |
| Design Standards | GB / ASME / DIN / 3A optional |
Tank & System Design
● Stainless steel structure (SUS304 / SUS316L)
● Open or closed tops for chemical tanks
● Optional insulation or heat tracing for hot water tanks
● Adjustable support legs for level installation
Pumps & Agitation
● Forward and return process pumps
● Diaphragm pumps for acid/alkali circulation
● Flow rate: 1–20 m³/h, adjustable per process
● Automated flow, temperature, and pH control
Operating Conditions
● Temperature range: ambient up to 85°C
● Working pressure: atmospheric
● Suitable for low- to medium-viscosity cleaning liquids
Connections & Accessories
● Tri-clamp fittings for inlet/outlet connections
● Optional manholes for tank inspection
● Sampling valve optional
● CIP spray ball compatible
Control & Monitoring
● PLC-controlled system with color touch screen
● Automatic sequence for pre-rinse, alkali wash, intermediate rinse, acid wash, final rinse
● Alarm functions for low/high liquid levels, pump failure, temperature anomalies
● Data recording for time, temperature, pH, and cleaning sequences
Material & Hygiene Standards
● Product-contact material: SUS304 or SUS316L
● Structural material: SUS304
● Seals & gaskets: Food-grade silicone, EPDM, or PTFE
● Pump & valve material: Sanitary stainless steel
● Welding: TIG argon welding with smooth internal welds
● Piping: Seamless sanitary stainless steel
● Compliance: FDA, 3A, GMP
● Design standards: ASME, DIN, GB
The system is designed for high hygiene standards with smooth surfaces, no dead corners, and CIP compatibility for automated cleaning.
Advantages
● Integrated heating and cooling for temperature-sensitive materials
● High-efficiency agitation ensures uniform product texture and quality
● Excellent insulation for energy savings and stable operation
● Food-grade, hygienic design with full CIP cleaning compatibility
● Modular, customizable system adaptable to various industries
● Suitable for continuous or batch production processes
Applications
● Dairy: Milk pasteurization, yogurt base preparation
● Beverage: Juice blending, tea drink mixing, syrup formulation
● Brewery: Wort or yeast mixing, low-temperature blending
● Food: Sauce, flavoring, and ingredient emulsification
● Pharmaceutical: Liquid preparation, nutrient solution mixing
● Cosmetic: Creams, lotions, and gel base homogenization
Optional Configurations
● Multi-loop cleaning circuits
● Automated VFD control for pumps
● High-temperature cleaning cycle
● CIP spray ball or pipeline integration
● Load cells for chemical dosing
● Level gauges (magnetic or electronic)
● Temperature sensors
● Sight glass with LED illumination
● Pressure/vacuum relief valves
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