WaterSolve’s Chemical Control & Tracking System (CCTS) has been designed and built to efficiently feed chemicals for dewatering applications. This system optimizes the application of chemical by automatically adjusting the feed rates based on variations in slurry line flow rate and in-line solids concentration. Our system also provides documentation and tracking of several applicable parameters.
Chemical Control & Tracking Systems for Environmental Solutions
Specifications listed below are for the base unit. We routinely customize the system to meet project specific requirements
VMT-30P-3000-RPX LIQUID POLYMER BLENDING SYSTEM
- Dilution Water Flow: 5 to 50 gpm
- Polymer Flow Range: 3.0 to 30 gph
DILUTION WATER INLET ASSEMBLY
- 1-1/2” FNPT water inlet connection
- Dilution Water ON/OFF Solenoid Valve
- Linear Actuated Automatic Flow Control Valve
- Primary Dilution water flow meter type: Paddle Wheel
- 0-160 psi inlet water pressure gauge (stainless steel, liquid filled)
- Plumbing—SCH. 80 PVC
SERIES RPX RATIO CONTROLLER
The control system shall be designed to precisely control dilution water flow in proportion to polymer flow (polymer master) based on an operator input of desired solution concentration. The controller shall have two (2) modes of operation:
Manual Mode: Operator sets pump rate and water rate manually by increase and decrease push buttons on controller face.
Proportional Auto Mode: Operator sets desired solution concentration. (2) Input signals (4-20mA) are taken in from a solids analyzer and a flow meter, and are fed into a tuned loop. The Polymer Metering pump follows 4-20mA pump pacing input signal. Water rate is controlled to maintained desired solution concentration.
Additionally, a 4-20mA output is available to control a second chemical pump. This pump will include a control loop with input variables as described for the polymer pump above.
STATUS/ALARM INDICATORS
- Low Water Flow Alarm
- Low Polymer Flow Alarm
- Manual Mode
- Proportional Manual Mode
- Proportional Auto Mode
- Calibration Mode
- Inputs (signals by others)
- Remote Start/Stop (discrete dry contact)
- Pacing Signal Based on Process Flow (4-20mA)
- Flow Meter Signal (4-20mA)
- Solids Analyzer Signal (4-20mA)
POLYMER MIXING CHAMBER
- Type: Staged Hydro-Mechanical
- Body: Stainless Steel
- Pressure Rating: 100 psi
- Pressure Relief Valve
SOLUTION DISCHARGE ASSEMBLY
- 1-1/2” FNPT solution discharge connection
- 0-160 psi solution discharge pressure gauge (stainless steel, liquid filled)
- Plumbing—SCH. 80 Stainless steel
OPERATOR INTERFACE WITH COLOR TOUCHSCREEN
- System ON/OFF Mode (change mode, select mode)
- Manual mode
- Proportional Manual mode
- Proportional pump Pacing mode
- Set % Solution (proportional modes only)
- Set Poly Rate (Manual and remote pacing modes only)
- Set Water Rate (Manual and remote pacing modes only
- Polymer Pump Calibrated Value Input
- Up Arrow
- Down Arrow
INPUTS (SIGNALS BY OTHERS)
- Remote Start/Stop (discrete dry contact)
- Pacing Signal Based on Process Flow (4-20mA)
- Flow Meter Signal (4-20mA)
- Solids Analyzer Signal (4-20mA)
NEAT POLYMER METERING PUMP
- Type: Progressive Cavity type with 1/2 hp, 1750 rpm, 90 vdc, Wash-down Duty Motor
- Gear Reducer
- Thermal type loss of polymer flow sensor
- Pressure relief valve plumbed to suction
- Metering pump calibration assembly with isolation valves: 1000 ml (16 gph)
CONTROL PANEL
- Features: NEMA 4X FRP Enclosure
- 120 vac, 60 Hz, 1 Ph Service
- NEMA 4X Conduit and fittings
ALPHA NUMERIC DISPLAY
- Pump Rate
- Water Rate
- Solution Concentration
OUTPUTS
- System Running (discrete dry contact)
- Remote Mode (discrete dry contact)
- Common Alarm (discrete dry contact)
- Polymer Pump Rate (4-20mA)
- Additional Pump Rate (chemical pump) (4-20mA output)
- Slurry Density Readings
- Slurry Flow Rate Readings
SPECIAL FUNCTIONS & FEATURES
- Proportional control of water to polymer flow (ratio control) as outlined above
- Polymer pump rate input for calibration
- Trending of polymer flow, water flow, additional chemical flow (4-20mA) and flow meter and solids analyzer data
