Task:Design and build a control system to generate foam used in soil conditioning for underground tunnel projects. The unit will control the flow of water, air, and chemical to produce a specified consistency of foam. Unit must be compact and fit in a small underground mining train. System must be remote controlled. Solution:Provide Electrical and Mechanical CAD drawings of design, EASI also provided the follow Key components: - (2) VFD controlled Continuously rated pumps
- Mass flow and Magnetic flow meters provide PID control
- PLC based control in a NEMA 4 Enclosure
- HMI remote in a NEMA 4 Enclosure
- PLC program written to meet customers needs
- Total system contained in rigid steel frame protecting from underground elements
- Dual Emergency Stop push buttons
- Heater to eliminate condensation
- Specialty designed spray nozzle to assist in product mixing along with static mixer
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