Shandong Kosman Environmental Technology Co., Ltd. is one of the leading manufacturers and suppliers of solvent recovery unit in China. Please feel free to buy premium equipment for sale here and get pricelist from our factory. All customized products are with high quality and low price.
I. Product Overview
The solvent recovery unit is specialized environmental protection equipment designed to purify and recover organic solvent waste gases and liquids generated during production processes in industries such as chemicals, pharmaceuticals, coating, and electronics. By employing physical separation techniques-such as adsorption, condensation, and distillation-the unit separates organic solvents from the gas or liquid phase and converts them into clean, reusable solvents, thereby achieving the dual goals of resource recovery and regulatory compliance regarding emissions.
II. Working Principles
The unit utilizes three primary process pathways:
① Adsorption Method: This method leverages the porous structure of adsorbents-such as granular activated carbon or activated carbon fibers-to selectively adsorb organic solvent molecules from waste gas. Once the adsorbent reaches saturation, the solvent is desorbed (released) using steam or nitrogen and subsequently recovered through condensation. Offering excellent treatment efficiency, this is one of the most widely applied methods.
② Condensation Method: Based on the principle of varying saturated vapor pressures at different temperatures, this method employs multi-stage cooling to condense VOCs directly from a gaseous state into a liquid state. When used independently, it is suitable for treating waste gas streams characterized by high concentrations, low flow rates, and relatively simple compositions; however, it is frequently paired with concentration equipment (such as adsorption rotors) to handle high-flow, low-concentration gas streams.
③ Distillation Method: Designed for liquid waste solvents, this process involves heating the solvent to vaporize it; the resulting vapor enters a cooling system where it liquefies and flows out, thereby purifying and recovering the solvent.
III. Core Processes and Integrated Solutions
|
Process Route |
Core Technologies |
Recovery Rate |
Applicable Scenarios |
|
Adsorption + Steam Desorption + Condensation |
Granular activated carbon adsorption → Steam desorption → Condensation recovery |
≥95% |
Medium-to-low concentration, high-volume organic waste gas |
|
Adsorption + Nitrogen Desorption + Cryogenic Recovery |
Activated carbon adsorption → High-temperature nitrogen desorption → Cryogenic condensation |
≥95% |
Water-sensitive applications requiring high-purity recovery |
|
Condensation + Activated Carbon Adsorption |
Compressor condensation system → Activated carbon adsorption for polishing |
≥95% |
High-concentration waste gas + tail gas compliance assurance |
|
Distillation Recovery (Liquid Waste Solvents) |
Heating/vaporization → Condensation/liquefaction |
≥95% |
Liquid waste solvents (e.g., waste cleaning solvents) |
|
Rotor Concentration + Condensation Recovery |
Molecular sieve rotor adsorption/concentration → Condensation recovery |
- |
High-volume, low-concentration waste gas |
IV. System Composition
The solvent recovery unit generally consists of the following components:
|
System Module |
Key Equipment/Components |
Functional Description |
|
Pre-treatment Unit |
Filters, mist eliminators, coolers |
Removes particulates and liquid droplets from the exhaust gas; adjusts temperature and humidity |
|
Adsorption/Concentration Unit |
Adsorption tanks (activated carbon/activated carbon fiber), rotor concentration system |
Adsorbs or concentrates organic solvents from the exhaust gas |
|
Desorption Unit |
Steam generator/nitrogen system, vacuum pump |
Desorbs (releases) the adsorbed solvents from the adsorbent material |
|
Condensation & Recovery Unit |
Multi-stage condensers, coolers, gas-liquid separators |
Condenses gaseous solvents into liquid form for recovery |
|
Solvent Separation/Purification Unit |
Phase separation tank, molecular sieve dehydration tower |
Separates water and purifies the solvent |
|
Automatic Control System |
PLC control cabinet, explosion-proof instruments, touchscreen |
Fully automatic control; real-time monitoring of operating parameters |
V. Technical Parameters
|
Parameter/Item |
Technical Specifications |
|
Airflow Capacity |
200–10,000+ m³/h (customizable) |
|
Solvent Recovery Rate |
≥95% (up to 98%) |
|
Applicable Solvents |
Methanol, Toluene, Acetone, Ethyl Acetate, IPA, NMP, Thinner, etc. |
|
Equipment Material |
SUS304 Stainless Steel / Carbon Steel |
|
Explosion-proof Rating |
Ex d IIB T4 (compliant with GB3836 series) |
|
Control System |
Fully automatic PLC control with touchscreen operation |
|
Configuration |
Skid-mounted / Stationary |
|
Design Service Life |
≥10 years |
VI. Product Advantages
- High recovery rate: Solvent recovery efficiency exceeds 95%, allowing recovered solvent to be directly reused in production.
- Significant economic benefits: Every 1 yuan spent on system operation generates 3 to 6.1 yuan in revenue; solvent recovered during waste gas treatment boosts the enterprise's economic returns.
- Explosion-proof safety: Explosion-proof design compliant with the GB3836 series standards; certified by the National Quality Supervision and Inspection Center for Explosion-proof Electrical Products.
- Skid-mounted design: Compact footprint and structure, facilitating easy transportation and on-site installation.
- Intelligent control: Fully automated PLC control with one-touch start/stop and remote monitoring capabilities; real-time and historical data for parameters such as temperature, pressure, and flow rate are accessible.
- No secondary pollution: Recovered solvent is clean and uncontaminated; the condensate collected via the condensation method is clearly visible.
VII. Application Scenarios
|
Industry Sector |
Typical Applications |
Recoverable Solvents |
|
Pharmaceutical Industry |
Organic waste gas treatment and solvent recovery during pharmaceutical production |
Methanol, ethanol, acetone, etc. |
|
Petrochemical Industry |
Recovery of tank farm breathing emissions and loading/unloading waste gas |
Benzenes, alkanes, naphtha, etc. |
|
Chemical Industry |
Waste gas treatment for processes such as reaction, distillation, and extraction |
Various organic solvents |
|
Coating/Paint Industry |
Waste gas treatment for spraying, paint mixing, and drying |
Thinner, xylene, esters, etc. |
|
Electronics Industry |
Waste gas treatment from electronic component cleaning |
IPA, trichloroethylene, acetone, etc. |
|
Printing/Packaging Industry |
Waste gas treatment for printing, lamination, and coating |
Ethyl acetate, toluene, etc. |
|
Lithium-ion Battery/New Energy |
NMP waste gas recovery from coating processes |
NMP (N-Methyl-2-pyrrolidone) |
VIII. Ordering Information
|
Item |
Details |
|
Product Name |
Solvent Recovery Unit |
|
Process Options |
Adsorption + Condensation / Condensation + Adsorption / Distillation Recovery / Rotor Concentration + Condensation |
|
Airflow Capacity |
200–10,000+ m³/h (customizable) |
|
Applicable Solvents |
Methanol, Toluene, Acetone, Ethyl Acetate, IPA, NMP, etc. |
|
Explosion-proof Rating |
Ex d IIB T4 (optional) |
|
Equipment Material |
SUS304 Stainless Steel / Carbon Steel |
|
Design Service Life |
≥10 years |
|
Warranty Period |
12–24 months |
|
Optional Configurations |
Online monitoring system, DCS communication interface, 4G remote O&M module |
|
After-sales Service |
Technical support, on-site response within 48 hours |
Specific prices and delivery times are subject to actual quotation.
IX. Contact Information
Please contact us for further product details, technical solutions, or to obtain a quote.
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