PHOENIX Process Equipment Co.

- Model auto/CHEM™ - System Automation & Controls



PHOENIX has designed systems for thickening and dewatering effluent slurries since 1984. Our auto/CHEM™ System Automation responds quickly to varying feed conditions for consistent dewatering performance and overflow water quality. Improving performance while reducing labor input, PHOENIX incorporates sensing, monitoring, and modulating equipment and software into an integral control system that provides maximum flexibility and adaptability.


A properly designed dewatering system converts effluent slurry into a solid phase discharge cake. A sedimentation thickener upstream of the dewatering operation converts the process effluent into a thicker material for more effective dewatering. System operation is optimized and operating costs minimized when the solids feeding the dewatering press are controlled within a pre-defined density range. The components of the PHOENIX auto/CHEM™ system continuously control the press feed density while minimizing polymer usage.

PHOENIX also can extend our auto/CHEM System Automation for our dewatering plants to more comprehensive process automation and controls. Process automation systems using computer technology and software engineering are frequently used to automatically control various processes in chemical plants, petroleum refineries, pulp and paper mills, and other processing and manufacturing facilities. The plant Process Automation System (PAS) often uses a network to interconnect sensors, controllers, operator terminals, and actuators. Most PAS systems are based on open standards in contrast to Distributed Control Systems (DCS) that are traditionally proprietary. Today, a PAS normally aligns with SCADA systems.

In the absence of process automation, plant operators must physically monitor performance values and the quality of outputs to determine the best settings for optimum equipment operation. Maintenance must be accomplished at set intervals. This generally results in operational inefficiency and sometimes unsafe working conditions. Process automation simplifies this with the help of sensors located at critical points throughout the plant that collect data such as temperature, pressure, and flow rate. This data is stored and analyzed on a computer. The entire plant and each piece of production equipment can then be monitored on a large screen in a control room. Plant operating settings are automatically adjusted to achieve optimum plant performance. Plant operators can manually override the PAS when necessary. Plant managers need for their equipment to deliver the highest output while minimizing production costs. In some industries including oil, gas, and petrochemicals, energy costs can represent 30 to 50 percent of the total cost of production.

Process automation allows computer programs to utilize collected data to not only show how the plant is performing but to simulate different operating scenarios to find the optimal strategy for each piece of equipment. A unique characteristic of this software is its ability to 'learn' and predict trends while reducing response times as conditions change. The result is more efficient production, higher outputs, and reduced energy costs. This also ensures consistent product quality and lower maintenance costs from eliminating excessive equipment stopping and restarting caused by unnecessary maintenance.

PHOENIX Process Equipment Co. provides the entire instrumentation and automation package for the dewatering process and works with our customers' engineers and programmers to incorporate this technology into their existing Programmable Logic Controller (PLC) programs. Or, we can provide stand alone loop controls to simply control a portion of the process. We work with our customers to assess what will best fit their needs and their processes.

  • Polymer dosage control
  • Self-tuning PID controller
  • Flocculation monitor
  • Automatically controlled dosage pump
  • Thickener bed level control
  • Sludge level sensor
  • Graphic solids bed display profile
  • Self cleaning probe
  • Thickener underflow density control
  • Densometer with 4 to 20 ma signal
  • Controller
  • Proportional dilution valve
  • Dewatering System Controller (DSC)
  • Logic control panel
  • Processor and instrumentation
  • Field devices and pump controllers
  • Operator Interface PC and monitor
  • Remote control panels

  • Minimum polymer usage
  • Polymer dosage tracks real time demand
  • Reduce labor input
  • Fewer process upsets
  • Extended belt life for belt filter press
  • Reduced solids recycled to thickener

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