Waste Managment


Waste Managment


 

OUR TECHNOLOGY

 

Drilling Engineering Consultancy Services DECS Technologies innovative technology is based on an Indirect-heated rotary desorber system which employs the use of an oxygen-deficient atmosphere while desorbing / separating volatile and semi-volatile organic compounds from the solids. The rotating system is capable of maintaining material temperatures ranging from 600?F - 1400?F (315?C - 760?C). Slightly negative pressure is continuously maintained on the desorber. This assists in removing process gases from the desorber and into the Vapor Recovery Unit (VRU). Within the VRU the process gases undergo treatment inside a series of scrubbers and separators where entrained solids, water and hydrocarbon vapors are removed from the gas stream.

The second step in the gas treatment is accomplished when the effluent from the primary scrubber are passed through a heat exchanger / condenser where the gas temperature is further reduced to below 100?F (38?C). The vapors exiting the heat exchanger at this point include residual non-condensable gasses and water vapor. Depending on the local regulatory guidelines and emission requirements, these vapors may be discharged directly into the atmosphere. Should it be determined that additional treatment of the off-gases are required, final gas treatment to remove any residual contaminants can be achieved using activated carbon, bio-filters or thermal oxidation in ATDU furnace. All condensed vapors from the VRU undergo a separation and cooling process once inside the Water Treatment Unit (WTU).

 

The second step in the gas treatment is accomplished when the effluent from the primary scrubber are passed through a heat exchanger / condenser where the gas temperature is further reduced to below 100?F (38?C). The vapors exiting the heat exchanger at this point include residual non-condensable gasses and water vapor. Depending on the local regulatory guidelines and emission requirements, these vapors may be discharged directly into the atmosphere. Should it be determined that additional treatment of the off-gases are required, final gas treatment to remove any residual contaminants can be achieved using activated carbon, bio-filters or thermal oxidation in ATDU furnace. All condensed vapors from the VRU undergo a separation and cooling process once inside the Water Treatment Unit (WTU).

 

The output from the WTU has commercial value and consists of three separate streams: solids, oil, and water. The oil can be further treated and used to fire ATDU burners. The recovered water once cooled can be recycled through the plant as cooling / process water. DECS Technologies provides complete plants including feed system, Anaerobic Thermal Desorption Unit (ATDU), Vapor Recovery Unit (VRU), Water Treatment Unit (WTU), and associated process controls.

INDUSTRIES WE SERVE

 

Management of contaminated sites, refineries and other petroleum waste generators has become a major environmental issue. The worldwide environmental awareness has corresponded to new laws and regulations governing all aspects of waste storage, treatment and disposal. Bans on the disposal of contaminated soil and petroleum waste in landfills and seas have inspired the development of a permanent solution for this problem. DECS, has developed and successfully presented on the World market its Anaerobic Thermal Desorption Unit (ATDU), which has the capability of treating the following materials:

  1. Crude oil tanker bottom's and other marine waste
  2. Oily sludge
  3. Tank bottom's
  4. Refinery waste
  5. Drill cuttings
  6. Contaminated filter cakes
  7. Polyaromatic hydrocarbon's (PAH's)
  8. Polychlorinated biphenyl's (PCB's)
  9. Pesticides
  10. Trichloroethane (TCE)
  11. Perchloroethene (PCE)
  12. Other chlorinated organic compounds
  13. Other contaminated materials & waste

PLANT COMPONENT

 

  1. Pretreatment Unit
  2. Feed System
  3. Anaerobic Thermal Desorbtion Unit (ATDU)
  4. Solid Discharge and Conditioned System
  5. Vapor Recovery Unit (VRU)
  6. Water Treatment Unit (WTU)

TECHINICAL SECIFICATION OF THE PLANT

 

Feed Material:             Drill Cuttings (OBM)

Particle Size:               50 mm (2” minus) in diameter or less

Capacity:                     10-15 MT/HR

Feed material content:   Moisture 10 % by weight

                                                Hydrocarbons 20 %

                                                Solids              70 %

Plant fuel:                    fuel oil no. 2

Estimated fuel consumption rate:  40 – 45 liters per metric ton        

ATDU Feed:               Ambient 10°C (50°F)                         

ATDU Discharge:       425 – 480°C (800 – 900°F)

Estimated Electricity: 500 – 600 amp service, 400V/50 Hz/3ph