A flue chimney, 15,000mm long and 560mm diameter shall be constructed from steel sheet, complete with lagging, damper and rain water protection cone.  The chimney shall be lined with castable grade diatomaceous concrete mixed with high alumina cement in accordance with BS 4076: 1989.

The damper will control the closing of the door to not less than 85%.  The stack is to allow fresh air at the stock’s base so that the flue gases are discharged at not move then 4000 C and that the discharge conforms to the British Clean Air Act, the National Environment Management Agency (NEMA) Act or other relevant acts. .

1.1.4    POWER SUPPLY

The sub-contractor shall supply equipment which are suitable for running on a 415V, 3 phase, 50HZ or 240V, single phase, 50HZ electric power supply.

1.1.5   OIL STORAGE AND SUPPLY

The system shall consist of a bulk oil storage tank, daily tank, transfer hand fuel pump and associated pipe work.  Oil from the bulk storage tank will be delivered to a high level daily tank situated in the incinerator room by use of a transfer hand pump and automatic electric pump.

1.1.6    SPARES AND MANUALS

The tenderer is to submit with his tender a list of recommended initial stock of spares together with their prices.  A part from the burner spares mentioned here below, the spares prices are not to be included in the main summary of prices schedule but is to be separate and are meant to be ordered later if and when it becomes necessary and convenient to the client.  The burner spares whose prices are to be included in the main summary of prices schedule (BQ) are:-

i)     1No. Set of safety controls
ii)    1No. Solenoid valve
iii)    1No. Oil ignition system
iv)    2No. Photo-electric cells

Two sets of operating and maintenance manuals (both for the incinerator and burners) must also be supplied. This include two sets of control schematic diagrams for all the controls and wiring.

1.1.7   BULK OIL STORAGE TANK

The bulk oil storage tank nominal capacity of 10,200 litres and complying with BS 799 part 5: 1975 shall be positioned on three concrete cradles.

The works shall include supply, delivery, assembling, erection, testing, commissioning and setting to work.  The tank is to be of welded mild steel type with a design pressure of  40KN/m2 and storage temperature of 240  C.  It is to be located adjacent to the incinerator and boiler house.

The tank shall be cylindrical with dished end and be constructed of 6mm thick block mild steel plates in accordance with BS 1966.  Number one quality galvanised materials shall not be used.Welded construction parts shall be sprayed.

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The tank shall be pressure tested with a total head of water or equivalent, measured from the base of the tank, and equal to 1½ times the sum of:

(i)     The height of the tank and
(ii)    The design head above the top of the tank that is 3.5m of water.

The pressure shall be raised slowly and steadily until the specified test pressure is reached and that pressure shall be maintained for a period long enough to permit a thorough examination to be made to ensure that the tank is sound enough and shows no leaks or undue distortion.  Welded joints shall be radiographed and a certificate issued.  Should any defects be found, they shall be made good and the test procedure repeated until the tank is certified to be sound.  The tests shall be carried out in the presence of the Engineer and subsequently, the sub-contractor will provide the Engineer with the test certificate.

The tank shall then be cleaned externally and provided with rust inhibiting primer before applying 2No. coats of bituminous paint.  The inside shall also be cleaned and purged of any foreign matter before setting to work.

Ladders and platforms shall be thoroughly cleaned and freed from rust and scale and painted with a priming coat of approved paint.

The tank shall be provided with the following:-

(i)    450mm bolted inspection covers with liquid and vapour tight joint made with a gasket of fuel resistant materials.
(ii)    75mm (3”) vent socket screwed B-SP and pipe at the higher end of the tank with an unloading device to prevent the rise in tank pressure above the design pressure.  The vent pipe shall be free from bends and shall have a continuous rise while being as short as convenient.  It shall terminate in open air in a position where it cannot be tampered with.  The open end shall be turned down and fitted with an open mesh wire cage.
(iii)    65mm diameter filling pipe with hose coupling connection
(iv)    50mm diameter gauging connection with lockable cap.
(v)     50mm diameter supply pipe
(vi)     25mm diameter water drain-off value

The tenderer shall supply hydrostatic oil contents gauge (level indicator) or a
properly calibrated stick (of dip tape) and access ladder to the top of the tank.

The filling pipe shall be extended inside the tank to within 150mm of tank bottom,
complete with anti-siphoning device.

The following information shall be permanently and clearly marked on the tank on the
centre line near the outlet connection.

•    Gross capacity in litres
•    Test pressure
•    Date of test
•    Maximum allowable working pressure
•    Manufacturer’s name of trade mark
•    Year of manufacture
•    The number of British standard and type of tank

The tank shall be installed with a 25mm fall towards the water drain-off tapping point.  The supply socket shall be extended inside the tank to prevent ingress of water in the supply line.  The main contractor shall construct tank supports and bund walls to detail drawings produced by the sub-contractor.  A valued drain off from the lowest part of the tank shall be provided complete with tail pipe and a provision for hose connection.

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1.1.8    TRANSFER HAND PUMP

A semi rotary hand pump shall be provided for filling the day storage tank from the oil drum.  It shall be installed complete with all the necessary plumbing fittings and accessories.

1.1.9   DAILY SERVICE TANK

A daily storage tank of nominal capacity 1,800Litres shall be mounted at 2.5 metre high level in the incinerator room.   Tank shall be manufactured from 6mm thick pressed steel plates of 1220mm x 1220mm black mild steel sheet, complete with bolted cover and adequate venting.  The tank shall conform to BS 799 part 5 1995 and be provided with a contents sight tube. The tank shall be lagged with 50mm thick fibre glass insulation of 0.4W/m2 thermal conductivity and finished with 20SWG galvanized sheets cladding.

The tank shall be tested for any leaks of which if any is detected will be made good before the tank is painted externally with rust inhibiting paint. Tank to be securely bolted.

1.1.10  AUXILLIARY EQUIPMENT

All pipework used in the oil storage systems shall be to B.S. 1387 heavy grade.  Joints shall be screwed, and sufficient unions must be provided to allow easy dismantling the equipment.

A 25mm diameter fire valve of the quick action lever operated dead weight type shall be installed, in the oil flow line.  This shall be held in the open position by a light gauge steel cable attached to a fusible link.  The fusible link shall be mounted directly over the burner.  The warm burner oil feed pipe from the high level day tank shall be heated by an electric tracing tape properly wrapped around the pipe.  The pipe shall then be insulated with 25mm thick fibre glass insulation and finished with gauge 22swg galvanized steel sheet.

The supply pipe from the bulk oil storage tank to the high level day has been installed by others but the tenderer shall allow for connection to the high level day tank.  The tenderer shall also supply and install high capacity strainers along the supply pipe and the burner feed pipe.

1.1.11   PIPE SUPPORTS

The variety and type of supports shall be kept to a minimum and their design shall be such as to facilitate guide and secure fixing to match concrete masonry or wood.

Consideration shall be given when designing supports to the maintenance of desired pipe fall and the restraining of pipe movements to a longitudinal axial direction only.

The sub-contractor shall supply and install all steel work forming part of pipe support assemblies and shall be responsible for making good any damage to builders work associated with builders work installation.

Pipe runs shall be secured by clips connected to pipe hangers, wall brackets or trapeze type supports.  ‘U’ bolts shall not be used for clips without prior approval of the Engineer.

The sub-contractor shall submit his entire proposal for the pipe supports to the Engineer for approval before any erection work commences.

1.1.12   ELECTRICAL WORKS

All wiring between items, plant and controls shall be executed by the tenderer. The tenderer shall provide adequate supervision to ensure that electrical connections are correctly made to all items of equipment and controls supplied by him, all to the Project Manager’s / Engineer’s satisfaction.

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1.1.13    INCINERATOR TESTING AND COMMISSIONING

The tenderer shall test and commission the incinerator in the presence of the Engineer.The tenderer shall also provide sufficient oil to last at least two (2) hours.  The tenderer shall test and commission the incinerator in the presence of the Engineer and verify that the incinerator is functioning according to the specifications laid here-in and in the catalogues and manuals from the suppliers of he incinerator.The incinerator performance test shall be carried out in accordance to BS3316: part 4:1987.Should any defect be detected, it shall be rectified and the testing process repeated to the Project Manager’s satisfaction.

1.1.14    FIRE INSTRUCTION NOTICE

Proceed and procure and install as below;

Print fire instruction on the Perspex plate, 3mm thick with White Colour
Background measuring 510mm lengthx380mm width as follows;

Load Capacity minimum:  1500 kg
Burner fuel type:  Diesel
Burner fuel rate max.:   20-25 Liter diesel/ per hour
Burners minimum: 3
Burning rate minimum: 200-300kg/per hour
Furnace bar area minimum: 2 м3
Fuel tank capacity minimum: 300L
Main chamber burning temperature min. 1100 0C
Afterburner chamber burning temperature min.  1300 0C
Power supply 220V
Incinerator items and electrical appliances should be weather proof
and humidity resistant within the range of 30-90 %
Incinerator should be compliant to the environmental protection rules
in accordance to national legislation
Maximum dimensions – Length – 5m, width – 3.5m, height – 5m.Medical and Biological wastage.
3.1              Main unit
3.1.1
Application      For incineration, general and pathological
3.1.2                                            Capacity       100 – 120 kg/h burn rate
3.1.3
Type    Two  combustion chambers type; primary  and Secondary, controlled/forced combustion air type with a flue gas emission scrubbing unit
3.1.4         Operating time                   Minimum 8 hours daily
3.1.5          Operating temperature        From 850 0C to 1200 0C, Automatic controlled
3.1.6          Residual Ash                       5 to 10%
3.2     Primary Chamber
3.2.1
Construction    Constructed from heavy duty mild or aluminized  steel
Or equal and approved equivalent
3.2.2
Insulation material               Refractory material lining similar or equal to calcium
Silicate and hot face combination of heavy duty brickwork
3.2.3
Internal Construction           Fixed hearth type complete with gratings, concave bottom and charging door, lined with refractory material
3.2.4
Charging Door                      Suitable for manual loading of wastes and with smooth
Dear seal equivalent of Ceramic seals with hinges.
3.2.5          Door Lock                             Automatic, Electric type
3.2.6
Ash removal door       Provided, for removing resultant bottom ash leftovers                              from the Primary chamber
3.2.7                                    Gratings       Provided
3.2.8                                            Loading    Manual loading of waste
3.2.9           Primary Burner                           Fully automatic, with fuel, temperature and speed  controls with ignition system  flame detector                                                         Air fan Complete with safety features, flame failure                                                                    Diesel fired fuel injector type
Flange mounted
3.2.10    Blower      Provided.  3 phase for supplying excess combustion air through the distribution system with speed control system
3.2.11    Temperature    Minimum exit 850 0C
3.2.12                               Observation port    To be provided with protective glass type
3.3    Secondary chamber
3.3.1
Construction    Constructed from heavy duty mild or aluminized steel or equal and approved equivalent
3.3.2                                            Insulation    Refractory material lining
3.3.3             Combustion Temperatures      Above 850 0C, controlled electronically
3.3.4             Gas residue or retention time                                              > 2 second at minimum 850 0C
3.3.5    Secondary Burner    Provided,
Diesel fired,
Fully automatic, with fuel, temperature and speed controls
With ignition system
Flame detector
Air fan
Complete with safety features, flame failure
Diesel fired fuel injector type
Flange mounted
3.3.6    Ejector    Provided, Venturi type, for cooling the flue gases
3.3.7
Combustion Air Fan                      Provided for supplying combustion and creating a
negative drift and turbulences with variable speed control
3.3.8                                         Temperature    Maximum  1600 0C
3.4       Chimney
3.4.1
Construction    Constructed from heavy duty mild or aluminized steel  or equal and approved equivalent
Refractory material lining
3.4.2                                                    Length    10 m above ground
3.4.3                                                        Bore    about 350mm diameter
3.4.4            Discharge temperatures             About 850 0C
3.4.5                                            Emissions    To comply with standards in section 9 of third schedule of the waste management regulations, 2006.
3.5       Electrical System
3.5.1    Control unit                                           Fully automatic with microprocessor based control
unit (PLC) automating all operations of the incinerator
Capable of monitoring all incinerator parameters
With large LCD or similar for display of all progress
Parameters  i.e. temperature of primary and second chambers , turbulence and time
With status lamp
With user of defined and differed programmed operating cycles for different type of loads/conditions
With safety interlocks, display of errors and visible and audio alarms.
System for continuous  emission monitoring
3.5.2    Isolator switch                                  Supply and install isolator switch 100A, 3 phase, 415V, 50Hz, for the incinerator unit , including all necessary cables 10m
3.5.3
Distribution Board           Supply and install distribution board 100 A, 3 phase 415V, 50Hz, complete with MCBs suitable for the rating of the incinerator unit and associated equipment.  Wiring   to be done according IEE regulations.
3.5.4
Wiring       Make provisions for wiring the isolator switch,
Distribution Board control unit to Incinerator and all associated equipment inside to incinerator room.
Working length 20m.
Wiring to be done using PVC Sheath cable on steel conduits and trucking and in accordance with IEE regulations
3.6    Fuel System
3.6.1          Fuel Tank                                            Supply and install storage fuel tank inside the incinerator room at an elevated position (about 1.5 m above the floor)
Tank capacity, 500 liters, constructed from preferable
suitable metallic material or high temperature
resistance material
Fuel type    Diesel
3.6.2
Fuel Lines                                       Supply and install fuel lines, complete with fuel filters, pump, sight glass, fuel level and all other safety devices and connect from fuel tank to incinerator.  Working length , 20m
Fuel pipe material    Special copper pipes or similar and approved materials
4. Physical characteristics
4.1              Main unit                                           Floor mounted, stand alone, fixed hearth type
Dimensions    About 2.5 x 2.8m (WxD)
5.  Operating environment
5.1              Power Requirements                      415V, A/C 50Hz, Three phase, with PE
Ambient temperature                     10 0C to 40 0C
Relatively humidity                          40% to 90%
6             Accessories
6.1             Rack, 2 m long                               1 piece
Waste cart, stainless steel               1 piece
7. Spare parts
7.1                                                      Burner        1 set
7.2              Fuel Filters                                         6 sets
7.3
All other spare parts                 required for replacement during and after 12 months of operations.    2 pieces of each
8              Quality Standards
8.2
Manufacturing standards               Environmental Management and Coordination Act, 1999
Legal Notice No.121 of 29th September 1999 on                                                                         waste Management Regulations
EU waste incinerator Directive- EC 76/2000
BS 3316
WHO Emission Standards
World Bank Emission Standards or any other internationally recognized standards
Conformity to standards                      CE marked or any other internationally recognized documents
9          Local back up service
9.1                                                         Available    Should be available locally
9.2           Capacity to service equipment                                                                         Manufacturer/Agent shall have adequate facilities, spare parts, qualified and skilled technical staff to offer comprehensive maintenance  service and spare parts sales for the lifespan of the incinerator
10       Delivery point
10.1                                                        KEMSA    For inspection and verification
10.2
Moi Voi, Makindu
Maragua, Eldama Ravine and Isiolo Hospitals      For installation, testing, NEMA Certification and commissioning
11    Pre installation works
Provide for foundation plinth, necessary plumbing works, Fuel piping works, Elevated Diesel oil storage tank, electrical works including cabling, trunking and switch gears required to install the incinerator and all its accessories to required IEE standards
12    Installation and testing    Complete installation and setup of the incinerator at designated as per manufacturer’s instructions
Provide fuel and test run the incinerator for 3 hours daily for 7 days
13            Training
13.1
User training                                           On site user training on operation and daily up keep
13.2
Maintenance training                            On-site maintenance training on Preventive Maintenance, repair and trouble shooting
14    Technical Documentations
14.1         User manuals                                          2 sets
14.2         Service manuals                                     2 sets
14.3                                                     Drawings    2 sets
15        Commissioning
15.1    Testing and Commissioning of the machine to the satisfaction of the user
16    Warranty
16.1                                                  Equipment      Minimum of one year after commissioning on all parts.
16.2       Equipment system                                     Nil
17.    Maintenance contract
17.2         Comprehensive preventive & repair         service      Provided a 12 months comprehensive preventive and repair service contract inclusive of spare parts and material from date of commissioning

Capacity per day around 8-10 kg wastage/day.·         Which product do you offer, only incinerator or also compactor, shredder machine, any other equipment related to waste treatment ?

·         For the incinerator, can you propose (and of so please send us specs and price) incinerator for 25 kg/hr, 50 Kg / hr, 100 kg / hr, 200 kg / hr ? what is your minimum and maximum size available ?

·         As we are not so experience in incineration process, can you tell us which type of waste can go into the incinerator and still respecting international environmental regulation ?

·         Do you equipped your incinerator with filters ? if so which one and they are following which standard ?

·         Can you supply exhaust pipe from incinerator to the roof, and then whirly bird to avoid the rain water to go into the pipe ?

·         When we install an incinerator within a building, what are the distance to observe between equipment and wall and roof (as we need to supply also the building to house the incinerator )