NAUTILUS (NIGERIA) ENGINEERING & CONSTRUCTION LTD

Transcription

1 NAUTILUS (NIGERIA) ENGINEERING & CONSTRUCTION LTD TDS 10 THERMAL PROCESSING EQUIPMENT FOR REMEDIATION OF CONTAMINATED SOILS, SLUDGES, DRILL CUTTINGS, ETC LOCATION: IRIEBE INDUSTRIAL NEW LAYOUT, OBIO AKPOR LGA, PORT HARCOURT, RIVERS STATE

2 I. THE EQUIPMENT TDS 10 THERMAL PROCESSING EQUIPMENT Nautilus (Nigeria) Engineering & Construction Limited (NNEC) operates a SafeSoil s TDS 10 equipment. The TDS-10 is a mobile thermal desorption system and is the appropriate solution for remediating contaminated soils, sludges, drill cuttings or other material contaminated by volatiles and semi-volatiles. The TDS-10 utilizes radiant heat to volatilize and separate the volatiles and semi-volatiles from the contaminated material, thereby rendering the material uncontaminated or below regulatory action limits. 3

3 FRONT VIEW OF TDS-10 THERMAL PROCESSING EQUIPMENT WITH A SECONDARY COMBUSTION CHAMBER 4

4 BACK VIEW OF TDS-10 THERMAL PROCESSING EQUIPMENT WITH THE PRIMARY TREATMENT CHAMBER

5 II. THE TECHNOLOGY The operation of the TDS-10 unit consists of three distinct processes: The movement of contaminated material through the Primary Treatment Unit (PTU). The heat transfer process to volatilize and separate the contaminants from the material in the PTU and The removal of the volatilized vapours. 6

6 The contaminated material is introduced into TDS- 10 unit Via a conveyor belt system that empties into the input end of the PTU. Once inside the unit, the contaminated material is moved through the PTU to the discharged end of the system. The PTU provides a heat source which separates and volatilizes the contaminants from the material. 7

7 NNEC THERMAL DESORPTION UNIT (TDU) Channel that takes the vapor from the processing chamber to the bag house and condensing chamber to trap the dust and separate the oil from water. Inlet spot where drill cutting is feed into the main processing chamber. Outlet Screw Conveyor is the discharge point of clean cutting after treatment. The Main Processing chamber is where the actual heating of 400degree centigrade must be attain for proper elimination of all hydrocarbon. The Burner uses diesel as its burning agent to heats up the burning chamber that houses the high temperature oil (HTO) Main Control Panel where the temperature of processing chamber, and burning chamber is Processor [A WASTE MANAGEMENT CONSULT]. 8

8 HTO HEATING UNIT 9

9 The heat source for the PTU is the heater unit which is filled with heat transfer fluid and can be fuelled either by natural gas, propane or diesel (In our case by diesel). The heater is activated to bring the temperature of the heat transfer fluid to temperature ranging from 400 F to 750 F (204 C C). The heat transfer fluid is circulated through the system including the PTU. The heat transfer fluid is pumped through the interior of the PTU as well as the exterior jacket, in order to provide a large surface area for heat transfer between the contaminated material and the PTU. 10

10 The PTU consists of a patented process that conveys the contaminated material from the input end to the discharged end of the PTU. The processed material is discharged into the waste collection bin from the PTU and the decontaminated, clean material moved to a stockpile. 11

11 TECHNICAL DATA Trailers (2) Trailer Weight 45`(L) by 8`(W) by 13`(H) Approximately 40,000 lbs each Working Area Required 80` by 100` Number of Personnel to Operate 4 Set-up Time 4 hours Fuel Natural Gas/Propane/Diesel 12

12 PRIMARY TREATMENT UNIT (PTU) Temperature Range 350 F F (176 C C) Retention Time Range Material Temperature Out 20 to 50 minutes 200 F F (93 C-176 C) Contaminated Material Moisture Content 0 to 60% Moisture Content Out 0 to 5% 13

13 TREATMENT OF VOLATILES The volatilized contaminants (vapors) are removed from the PTU, and enter a knockout chamber where most of the remaining moisture is removed. Some water which may accumulate in the knockout chamber is fed back to the system. The vapors then enter a baghouse where they are filtered for particulates and are either fed into a custom-designed Secondary Combustion Chamber (SCC) where the volatiles will supplement the fuel for the SCC, or fed into a Condensing Unit (CU) for recycling. In the case where the vapors enter the SCC, the SCC provides a minimum of 2.5 seconds of residence time to completely combust the volatiles. Air emissions are substantially below regulatory levels. 14

14 In contrast to a rotary kiln direct fire incineration process, the TDS-10 has no open flame contact with the contaminated material. In many locations where it is used in the USA, because of the excellent quality of the TDS-10's air emissions, along with the no open flame radiant heat process, there are no air permitting requirements. 15

15 Secondary Burner that is used to burn all the hydrocarbon that cannot be eliminated in the processing chamber. Stack through which treated air passes into the atmosphere. Processor Processor High Temperature Oil (HTO) Storage center stored the returned HTO after it has undergone a full revolution from the processing chamber, and its also used to check the temperature of the retuned HTO. The Bag House is where the dust trapping and condensation of vapor from processing unit takes place. Control Panel for the secondary burner, used in checking the internal burning temperature. 16

16 Air Flow Temperature Stack Temperature Retention Time Total Hydrocarbon Emissions Benzene Emissions Process Rate SECONDARY COMBUSTION CHAMBER (SCC) 750 t scfm (0.5-1m 3 /s) 1450 to 1700 degrees Fahrenheit ( C) 1475 to 1700 degrees Fahrenheit 2.5 seconds lbs/hr 1.25x10-6 kg/s < lbs/hr 1.75x10-6 kg/s 7 to 15 tons/hour 17

17 III. WASTE TREATMENT PROCESS Untreated Waste Receipt and Management Waste Processing in TDU Treated Waste Collection and Handling Volatiles Treatment and Discharge Monitoring 18

18 CONTAMINATED SOIL IN SKIPS VOLATILE TREATMENT VOLATILEs HOLDING PIT SCREENING --TDS IO THERMAL FLUID TREATED SOIL TO STORAGE WASTE HANDLING PROCESS 19

19 III. (A) RECEIPT AND MANAGEMENT OF UNTREATED WASTE Contaminated soil is brought into the treatment Yard from the site in skips Content of skips is discharged into the storage pit Skips washed and sent back to Waste Provider 20

20 NNEC STORAGE AND EFFLUENT SYSTEM NNEC 14,400 cubic feet 4 chamber in 1 storage facility 1. NNEC Effluent System NNEC factory that house the TDU [A WASTE MANAGEMENT CONSULT]. 21

21 III. (b) WASTE TREATMENT IN TDU Heating system activated for 2hours for temperature to reach 400 F to 750 F Waste input into TDU via Inlet Screw Conveyor Treated waste collected into mobile waste bins Treated waste transferred to temporary storage area. 22

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24 TREATED WASTES BEING DISCHARGED IN THE WASTE COLLECTION BIN -26/9/

25 III. (c) VOLATILES TREATMENT AND DISCHARGE Volatiles from TDU goes into the treatment units on the second trailer VOLATILES TREATMENT UNIT Effluent discharged via the stack 26

26 III. (d) MONITORING Samples of : a. Untreated waste b. Treated waste are taken per batch for laboratory analysis. Air quality is also measured close to the stack Noise level is also monitored. 27

27 TYPICAL ANALYSIS OF TREATED AND UNTREATED WASTES 28

28 TYPICAL AIR QUALITY AND NOISE LEVEL MEASUREMENT 29

29 IV. NNEC WASTE TREATMENT EXPERIENCE S/N COMPANY ACTIVITY 1 Chevron Nigeria ltd 2 Universal Energy/ SINNOPEC Joint Venture We managed sludge for Chevron Nigeria Limited for 2 years between 2006 and We provided Labour/ Equipment and supervision for the treatment of oily sludge/sand at our Iriebe TDU facility in Port Harcourt. The project is the waste management of Stubb Creek well 6 and the location is Akwa Ibom. We collected and treated about 2000 metric tons of drill cuttings waste from Stub creek well 6, 2008 AND 2009 CONTACT 1. Mr Ogunkayode Olugboyega 2. Mr. Stephen Oyafemi 3. Mr. Stanley Omagbemi 1 & 2 at Escravos, 3 at Onne 1 Mr. J. P. Feng (Chinese) 2. Mr. Nelsom Meniakiri (MD UNIVERSAL Energy) 3. Engr. Ekere Akpan 30

30 V. CONCLUSION Our TDS-10 Thermal Processing Equipment is mobile and thus can be mobilised on site to treat drill cuttings and soil remediation if warranted. This will drastically reduce logistics costs and the overall cost of operations. Our TDS-10 Thermal Processing Equipment has two burners for Natural Gas and diesel. When Natural gas is used, the cost of operations becomes cheaper. TDS-10 Air Emission data are substantially below regulatory levels because the volatilized contaminants pass through 2-phase treatment processes. 31

31 TDS-10 is very easy to operate. Only three (4) personnel are required at a time to operate the equipment. This makes the total operational cost very economical. TDS-10 is very efficient in the removal of Total Petroleum Hydrocarbons (TPH) and heavy metals from the contaminated materials. 32