Plasma scrubber washing dedicated power supply-Wuxi Musk Welding and Cutting Equipment Co., Ltd.

Plasma scrubber washing dedicated power supply

Product usage
● A plasma scrubber is a device that uses low-temperature plasma technology to treat industrial waste gas. This technology generates high-energy electrons, ions, free radicals and other active particles through high-voltage discharge, and decomposes harmful pollutants in exhaust gas into harmless or low-risk substances under normal temperature and pressure conditions, achieving purification.
● Compared with traditional exhaust gas treatment technologies such as thermal combustion, catalytic oxidation, and activated carbon adsorption, plasma scrubbers have the advantages of low energy consumption, high efficiency, wide applicability, and no secondary pollution. They have become an important technological choice in the field of VOCs (volatile organic compounds) treatment.

Features
● High processing efficiency, VOCs removal rate can reach over 90%
● Low energy consumption, with operating costs only 1/5-1/10 of thermal combustion
● Operating at room temperature, no preheating required, fast startup
● Compact equipment with small footprint
● No secondary pollution, the main products are CO ₂ and H ₂ O

Working principle
Plasma generation mechanism
The core of a plasma scrubber is to generate low-temperature plasma through dielectric barrier discharge (DBD) or corona discharge technology. When a sufficiently high AC voltage (usually 5-30kV, frequency 50Hz-100kHz) is applied, the gas in the electrode gap is broken down, forming a large number of micro discharge channels.
During the discharge process, electrons obtain energy from the electric field (with an average energy of 1-10 eV), and these high-energy electrons collide with gas molecules, triggering the following main reactions:
• Electron collision excitation: e+M → M *+e
• Electron collision ionization: e+M → M ⁺+2e
• Electron dissociation: e+AB → A+B+e
• Attachment reaction: e+AB → AB ⁻
Degradation process of pollutants
Organic pollutants in exhaust gases undergo complex physicochemical processes and are degraded in plasma environments. The main degradation pathways include:
1. Direct electron collision: High energy electrons collide directly with pollutant molecules, causing them to excite, ionize, or dissociate.
2. Free radical reaction: Active free radicals such as · OH, · O, · N generated by discharge react with pollutants.
3. Ozone oxidation: The O3 generated by discharge undergoes an oxidation reaction with pollutants.
4. UV photolysis: The UV radiation generated during the discharge process causes pollutants to undergo photolysis.

Technical features
Compared to traditional exhaust gas treatment technologies, plasma scrubbers have the following characteristics:

Comparison items	Plasma	Thermal combustion	Activated carbon adsorption
Processing temperature	Room temperature	700-800℃	Room temperature
Energy consumption	Low	Tall	Middle
Remove efficiency	85-99%	95-99%	60-90%
Secondary pollution	Nothing	NOx	Waste activated carbon
Floor area	Small	Big	Middle

Comparison between plasma scrubbers and traditional technologies

Core technological advantages:
1. Broad spectrum: It can simultaneously handle multiple types of VOCs, including alkanes, alkenes, aromatic hydrocarbons, oxygen-containing organic compounds, etc.
2. Adaptability: Strong adaptability to fluctuations in exhaust gas concentration, capable of treating low concentration (<100ppm) exhaust gas.
3. Safety: Operated at room temperature, with no risk of fire or explosion.
4. Modularization: It can be flexibly combined according to processing capacity, making it easy to expand.

Technical indicators
Performance parameters

Parameter name	Numerical range	Remark
Handling air volume	1000-50000 m³/h	Customizable
VOCs removal rate	≥90%	Depending on the composition
Odor removal rate	≥95%	NH₃、H₂S, etc
Input voltage	AC 380V ± 10%	Three-phase five-wire
Discharge voltage	5-30 kV	Adjustable
Discharge frequency	50 Hz - 100 kHz	Adjustable
Power density	5-50 W/L	Depending on concentration
Equipment resistance	<500 Pa	Low resistance

Structural parameters

Parameter name	Specifications	Material
Reactor shell	Carbon steel/stainless steel	Q235/SUS304
Discharge electrode	Stainless steel needle/wire	SUS316
Grounding electrode	Stainless steel plate	SUS304
Dielectric layer	Ceramic/Quartz	Al₂O₃/SiO₂
Insulating material	Polytetrafluoroethylene	PTFE
High voltage power supply	High frequency inverter	IGBT module
Control system	PLC automatic control	Siemens/Mitsubishi

Application field

Plasma scrubbers are used for exhaust gas treatment in the following industries:
Printing and packaging industry
The main components of ink waste gas generated during printing, lamination, and coating processes are toluene, xylene, ethyl acetate, etc.
Painting and spraying industry
Dealing with paint mist and organic solvent waste gas generated during the painting and baking process, including alcohols, ketones, esters, etc.
Chemical and pharmaceutical industry
The process exhaust gases emitted from reaction vessels, distillation towers, drying equipment, etc. are complex and diverse in composition.
Electronic semiconductor industry
Process special gases and organic waste gases generated by photolithography, etching, cleaning, and other processes.
Food processing industry
Dealing with oil fumes and odors generated during processes such as frying, baking, and fermentation.

Equipment selection
According to the processing air volume and pollutant concentration, plasma scrubbers are divided into the following standard models:

Model	Handling air volume	Installed capacity	Dimensions (mm)
PS-1000	1000 m³/h	3 kW	1200×800×1500
PS-3000	3000 m³/h	8 kW	1800×1000×1800
PS-5000	5000 m³/h	12 kW	2200×1200×2000
PS-10000	10000 m³/h	22 kW	2800×1500×2200
PS-20000	20000 m³/h	40 kW	3600×2000×2500
PS-50000	50000 m³/h	90 kW	5000×2800×3000

Selection precautions:
• The particulate matter content in the exhaust gas should be less than 5mg/m ³, and if it is too high, pre-treatment is required
• The relative humidity should be less than 80%. If it is too high, dehumidification treatment is required
• The exhaust gas temperature should be less than 60 ℃. If it is too high, it needs to be cooled down
• Halogen containing exhaust gas requires special design to prevent corrosion
• Explosion proof measures must be taken for flammable and explosive exhaust gases