Zhenghai Solvent Recovery Unit

General information

This unit has function on environment protection and solvent recovery. It is designed on solvent level in VOC emission by customer's facility. Each unit is designed according to the solvent by selecting relevant activated carbon, for example, Acetone carbon for recovering acetone in VOC, gasoline carbon for gas station, toluene carbon for recovering toluene.
Carbon is saturated with solvent in VOC. Steam is used to heat carbon to de-adsorb solvent, which is condensed later.
This unit is non-standard equipment which consists of fan, pre-treatment of VOC, carbon bed, condenser, automatic valve, control system.
According to customers' requirement this unit may be automatic controlled or manual controlled and safety operation training can be provided after service.

Performance of unit

This is designated to adsorb solvent at low boiling point. Carbon assortment is decided by the solvent selected. VOC needs to be pretreated prior to carbon bed such as bag filter, washing, control of moisture and purification on dust, high boiling point and other impurities. Then VOC passes through carbon bed with solvent adsorbed and air vented. Steam de-adsorbs solvent and is condensed later.

Process

Process composes of 4-step treatment, adsorption, de-adsorption, cooling-down and drying. The first 2 treatments are necessary. The later 2 treatments are subject to carbon and property of solvent.

Maintenance

As fan turns on, at least one gate closes. Until current is stable, gate is opened slowly to position. In case of multi-fan, at least close one gate of this fan prior to turning off fan. It is to prevent backward flow.

Other items

1. Medium support
   (1). Steam
   (2) . Cooling water - for condensation to meet designed cooling requirment.
   (3). Electricity - 380 volts power supply.
   (4) . Compressed air 0.2 - 0.6Mpa as power for auto-controller.
2. Energy consumption
   It takes no more than 3.0 ton of steam/ ton solvent.
   We train operation staff of customer to achieve more recovery and less energy consumption.
3. Safety
   Solvent is flammable which has special requirement on safety. We designs system in principle of explosion protection.

Example

Feature and performance: Explosion protection design; Zhenghai Acetone carbon; Recover 99.9% acetone; Energy consumption 2.5 tons steam/ton acetone.
This unit can recover benzene, toluene ,chlorobenzene, #150 oil solvent, mettand, ethand acetone, formicacid, and gasolineete. by selecting different kind activatedd carbon.

Health and safety for using solvant recovery system.

• Strictly forbid any flame (smoke, welding etc.) area management according class A explusion-proof. Site work should be prooved by written application;
• Equipnent electrio discharge prohited;
• Check the equipment in good condition, eliminate lackage;
• Checkthe unite heat preservation in good condition, prevent steam hurt during operation;
• Before stopping production, please confirm all the absorbers were completely stopped. When the temperature below 0°C in winter, please slightey open the valves to keep the wate running, preventing the valves from daneage.
• Forbid to step on all pipes and auto confroller in system.