Shandong Kosman Environmental Technology Co., Ltd. is one of the leading manufacturers and suppliers of secondary condensation 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 two-stage condensation Vapor recovery unit is an environmental protection device designed to recover volatile organic compounds (VOCs) by condensing them from the gas phase into a liquid state through a two-stage, gradient cooling process. Compared to single-stage condensation, the two-stage design utilizes stepped cooling to increase recovery efficiency by over 20% while avoiding the sharp rise in energy consumption caused by excessive temperature differentials.
This product is widely used for VOCs treatment and resource recovery in sectors such as oil storage and transportation, chemical production, and gas stations.
II. Working Principle
The two-stage condensation process relies on the principle that saturated vapor pressure varies with temperature. By cooling the gas in successive stages, hydrocarbon components within the Vapor mixture reach a state of supersaturation and condense into liquid for direct recovery.
Two-stage gradient cooling process:
|
Condensation Stage |
Typical Temperature |
Functional Description |
|
First-stage condensation (medium-temperature range) |
-10°C to 5°C |
Liquefies and separates high-boiling-point components (C6 and above) from the exhaust gas |
|
Second-stage condensation (deep-cooling range) |
-30°C to -75°C |
Further captures low-boiling-point organic compounds (C3–C5 components) |
After two-stage condensation, the majority of hydrocarbon components are liquefied and recovered; the small amount of uncondensed tail gas can be routed to post-treatment units, such as an adsorption unit, for deep purification.
III. Key Technical Parameters
|
Parameter Item |
Technical Specifications |
|
Condensing Temperature |
Stage 1: -10°C to 5°C / Stage 2: -30°C to -75°C |
|
Recovery Efficiency |
85%–95% for typical VOCs; up to 99% when combined with adsorption |
|
Vapor Handling Capacity |
50–3000 Nm³/h |
|
Explosion-proof Rating |
Ex d IIB T4 / Ex pxdmb IIB T4 |
|
Control Method |
Fully automatic PLC control |
|
Product Configuration |
Skid-mounted |
IV. Product Advantages
- High recovery efficiency: Stepped cooling design increases recovery efficiency by over 20% compared to single-stage condensation.
- Optimized energy consumption: Avoids the sharp rise in energy use caused by the large temperature differentials found in single-stage condensation; optimized temperature settings are -20°C for the first stage and -45°C for the second stage.
- Direct results: Enables direct recovery of liquid oil products with precise on-site metering.
- Ease of operation: Fully automatic PLC control, one-touch start/stop, and remote monitoring capabilities.
- Safety and reliability: Features multiple system protections and an explosion-proof design.
- Strong load adaptability: Capable of operating across a 0–100% load range.
- Skid-mounted design: Facilitates convenient transport and rapid installation.
V. Application Scenarios
|
Application Areas |
Typical Scenarios |
|
Oil Storage and Transportation |
Storage tank breathing emissions; vapor recovery during truck/ship loading |
|
Gas Stations |
Stage III vapor recovery |
|
Chemical and Pharmaceutical Industries |
Solvent vapor recovery from reaction vessels and mixing tanks |
|
Refining and Chemical Enterprises |
Waste gas treatment for intermediate product tank farms |
Applicable media: Gasoline, crude oil, diesel, benzene, toluene, xylene, styrene, naphtha, alcohols, ketones, esters, etc.
VI. Ordering Information
|
Item |
Details |
|
Product Name |
Two-stage condensation oil & gas recovery unit |
|
Condensation Temperature |
Stage 1: -10°C to 5°C / Stage 2: -30°C to -75°C (customizable) |
|
Processing Capacity |
50–3000 Nm³/h (customizable) |
|
Explosion-proof Rating |
Ex d IIB T4 (optional) |
|
Product Configuration |
Skid-mounted / Stationary |
|
Warranty Period |
12–24 months |
|
Optional Features |
Online monitoring system, downstream adsorption unit, DCS communication interface |
Specific prices and delivery times are subject to actual quotation.
VIII. Contact Information
Please contact us for further product details, technical solutions, or to obtain a quote.
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