Dry Scrubber
Dry Scrubber
A dry scrubber is an air pollution control system that removes acidic gases and other pollutants from industrial exhaust streams without using liquid. Instead, it uses dry reagents—such as lime, sodium bicarbonate, or activated carbon—that react with the harmful gases to neutralize or adsorb them. At Harsha Engineers India, we manufacture highly efficient dry scrubbers that are ideal for industries where moisture in the exhaust must be avoided, such as cement plants, waste incineration units, and thermal power stations. These systems are particularly effective in controlling emissions of SO₂, HCl, HF, and mercury, offering a clean and low-maintenance solution for air pollution control.
Our dry scrubbers are engineered for compact design, low operational cost, and ease of installation, making them a practical choice for retrofitting or space-constrained industrial setups. Built with high-grade materials and precision-engineered components, our scrubbers deliver reliable long-term performance with minimal waste generation. Harsha Engineers India provides end-to-end services—from system design and customization to fabrication and on-site commissioning—ensuring our clients receive robust and regulation-compliant emission control solutions tailored to their specific process needs.
| Parameter | Specification |
|---|---|
| Design Type | Duct injection or reactor chamber-based dry scrubbing system |
| Gas Flow Rate | 500 m³/hr to 100,000 m³/hr (custom-built) |
| Pollutant Types | SO₂, HCl, HF, NOx, VOCs, dioxins/furans, heavy metals |
| Removal Efficiency | Gases: 70–95% depending on residence time and sorbent type |
| Sorbent Materials | Hydrated lime, sodium bicarbonate, activated carbon |
| Sorbent Injection Rate | Adjustable as per pollutant load and stoichiometric ratio |
| Byproduct Handling | Solid residues (salts/particulates) removed via bag filter or cyclone |
| Operating Temperature | 120°C to 250°C (typical); customized for higher temps |
| Material of Construction (MOC) | Mild steel, SS304/316, or coated carbon steel (as per corrosivity) |
| Dust Collection Unit | Pulse jet bag filter, cartridge filter, or cyclone separator |
| Automation Options | PLC/SCADA integration, dosing control, emission monitoring |
| System Type | Standalone or integrated with other air pollution control systems (APC) |
A powdered sorbent material is injected directly into the polluted gas stream in a dry scrubber. The sorbent chemically reacts with acidic gases like sulfur dioxide (SO2), hydrogen chloride (HCl), or other harmful emissions as the gases move through the chamber to form solid compounds. After that, filters or dust collectors are used to collect these solids, and the cleaned gas is safely released into the atmosphere.
Dry scrubbers are widely used in a variety of industries where it is difficult or undesirable to handle liquids, such as:
- Boilers and power plants remove SO2, HCl, and other acid gases.
- Control of particulate matter and gaseous emissions in the cement and lime industries
- Pharmaceutical & Chemical Plants – Neutralization of corrosive vapors and toxic gases
- Food Processing Units – Odor and fume control
- Acid gas and heavy metal vapor treatment at waste incineration plants
- No issues with liquid waste management or disposal
- Compared to wet scrubbers, this one uses less water.
- Able to remove fine particles and acidic gases Suitable for businesses with limited space Affordable, dependable, and simple to maintain Friendly to the environment with little extra waste
Conclusion
At Harsha Engineers, we design and manufacture high-quality Dry Scrubbers that provide efficient gas cleaning solutions while eliminating the need for water treatment. Built with durable materials and precision engineering, our dry scrubbers ensure long service life, low operational cost, and compliance with environmental standards. They are an ideal choice for industries seeking sustainable and low-maintenance air pollution control solutions.
