Calculation Excel Hot | Scrubber Design

Scrubbers require a minimum liquid flow to keep the packing wetted.

Don't assume constant density. Use the ideal gas law in Excel: $$ρ_g (kg/m³) = \fracP_op \times MW8.314 \times (T_op + 273)$$

| Parameter | Example Value | Unit | | :--- | :--- | :--- | | Gas flow rate (actual) | 10,000 | m³/h | | Gas inlet temperature | 220 | °C | | Gas outlet temp (cooled) | 65 | °C | | Operating pressure | 1.013 | bar(a) | | Packing type | 2" Plastic Pall Ring | - | | L/G ratio (target) | 1.5 - 2.5 | L/m³ | scrubber design calculation excel hot

The "Hot" factor: Always convert gas flow from Normal/Standard to Actual at operating temp.

$$Q_actual = Q_std \times \fracT_op + 273273 \times \frac1.013P_op$$ Scrubbers require a minimum liquid flow to keep

In Excel: =B2*((B3+273)/273)*(1.013/B4)

In the world of industrial air pollution control, the wet scrubber remains the workhorse for removing particulate matter and acid gases. However, when an engineer types "scrubber design calculation excel hot" into a search engine, they are not looking for generic textbook formulas. They need solutions for high-temperature gas streams—where adiabatic saturation, water evaporation, and thermal shock risk dominate the design process. $$Q_actual = Q_std \times \fracT_op + 273273 \times \frac1

This article provides a deep dive into the rigorous calculations required for hot gas scrubbing and how to structure an Excel workbook that moves beyond static equations to dynamic, iterative solvers.

This document outlines the methodology for designing a Venturi Scrubber system intended for hot gas cleaning. The design focuses on removing particulate matter (PM) from high-temperature flue gases using a liquid spray. The accompanying Excel calculation tool utilizes iterative algorithms to determine the throat dimensions, pressure drop, liquid-to-gas ratio (L/G), and overall collection efficiency.

Excel drop-down drives different calculation pathways:

| Scrubber Type | Key Design Outputs | |---------------|--------------------| | Venturi | Throat velocity (60–120 m/s), pressure drop (based on Johnstone eq.), liquid-to-gas ratio (L/G) | | Spray Tower | Sauter mean diameter (SMD) of droplets, tower height, gas residence time | | Packed Bed | Packing factor (Fp), flooding % (≤75%), pressure drop via Leva or Eckert correlation | | Tray (Impinement) | Number of trays, slot velocity, weir loading |