1. What is Polymer Feed Rate as Mass Flow Rate?

Definition: This calculator determines the mass flow rate of polymer based on its volumetric feed rate, specific gravity, and concentration.

Purpose: It helps in wastewater treatment and other industrial processes where precise polymer dosing is required.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P \) — Polymer Feed Rate (kg/s)
• \( P_v \) — Volumetric Polymer Feed Rate (m³/s)
• \( G_p \) — Specific Gravity of Polymer
• \( \%P \) — Percent Polymer Concentration (decimal)

Explanation: The formula converts volumetric flow to mass flow using the polymer's density (via specific gravity) and accounts for the active polymer concentration in the solution.

3. Importance of Polymer Feed Rate Calculation

Details: Accurate polymer dosing is critical for effective water treatment, process efficiency, and cost control.

4. Using the Calculator

Tips: Enter the volumetric feed rate in m³/s, specific gravity (default 1.8), and concentration percentage (default 65%). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is the 8.34 factor in the formula?
A: This is the conversion factor from cubic meters to kilograms for water (1000 kg/m³ divided by 119.826427 to convert units).

Q2: What's a typical specific gravity for polymers?
A: Most polymers have specific gravity between 1.0-1.2, but emulsion polymers can be 1.05-1.3.

Q3: How do I determine the volumetric feed rate?
A: This is typically set by your metering pump or can be calculated from your system requirements.

Q4: Why is concentration expressed as a decimal?
A: The percentage is converted to decimal (e.g., 65% = 0.65) for the calculation.

Q5: Can this calculator be used for other chemicals?
A: Yes, with appropriate specific gravity and concentration values for the specific chemical.