SECTION V

 

• TECHNICAL SPECIFICATIONS OF THE INCINERATOR

 

• General Description

 

The plant must have four distinct sections that demonstrate three principles of turbulence, residence time and temperature retention. The regulated sections may include but not limited to:

 

1. Overall plant layout
2. Feed chamber/charging
3. Primary combustion chamber
4. Particulate scrubbers
5. Acid gas
6. The stack/chimney.
7. Minimum capacity of primary chamber = 10cubic meters
8. Burn rate (rate of waste incineration) = 10 kg per hour
9. Should have a full width counterbalance loading door allowing easy access to the main chamber for loading and removing ash.
10. The INCINERATOR should be NEMA approved in accordance with Environmental management and coordination (Waste management) Regulations of 2006.

 

• Scope Of Work

 

The work specified in the contract will include.

 

1. Supply, install and commission an incinerator as provided   in the technical specifications

 

2. Provision for adherence to OSHA and other statutory requirement relating to Health and Safety of workers during execution of the works covered in this

 

3. Assessment and preparation  and construction of  a standard incinerator shed with one waste  storage room  ( see the design )

 

4. Provision of operation and maintenance manuals and drawings complete with maintenance schedule and

 

5. Fuel oil storage tank- Mild steel 1000 liters capacity

 

6. Onsite training for operation and maintenance

 

IMPORTANT

To enable the Employer undertake conclusive evaluation of the tender, tenderers are requested to submit with their offers the detailed specifications, drawings and catalogues with Commissioning and maintenance instructions for the Incinerator they intend to Supply, install and commission.

Tenderers who fail to comply with this requirement fully shall have their tender rejected.

 

3. TECHICAL SPECIFICATIONS OF THE INCINERATOR

 

3.1  Feeding and Charging

 

Controlled hygienic mechanical feeding that does not negatively influence the air temperature in the primary and secondary chambers of the incinerator shall be used.

 

• Primary Combustion

 

• This chamber should be equipped with burners that use low sulphur
• The chamber should ensure a minimum exit temperature of 850 degrees
• This unit should operate at over 1100 deg C to ensure complete
• This chamber should be equipped with burners that use low sulphur
• Heavy-duty steel casing
• High quality refractory lining and insulation
• Large full size top load door and liquid retention
• 1 x oil fired ignition burners operated on/off

 

 

• Secondary Combustion Chamber (After burner)

 

1. Heavy-duty steel casing
2. High quality refractory lining and insulation
3. 1 x oil burner
4. Should be fitted with burners that use low sulphur
5. Ensure secondary air supply is controlled.
6. Ensure residence time is not less than two seconds.
7. Ensure that the gas temperature as measured against the inside wall in the secondary chamber and not in the flame zone is not less than 1100 degrees
8. Ensure the emitted oxygen content of the emitted gases is not less than 11%
9. Ensure both primary and secondary combustion temperatures are maintained until all waste is completely

 

• Particulate Removers

A mechanical particulate collector must be incorporated after secondary combustion chamber for removal of particulate pollutants entrained in the flue gas stream. The particulate collectors may include any of the following or a combination thereof:

 

1. Cyclone separator
2. Electrostatic precipitators
3. Fabric filters

 

• Chimney/Stack

 

1. The chimney should have a minimum height of 10 meters above ground level and clear the highest point of the building by not less than 3 meters for all The topography and height of adjacent buildings within 50 meters radius should be taken into account.
2. The chimney should be visible to the operator from the feeding

 

1. The minimum exit velocity should be 10 meters per second and at least twice the surrounding wind speed (Efflux velocity = wind speed x 2) whichever is higher to ensure no down washing of exiting
2. The point for measurement of emissions shall be

 

• Instrumentation

 

1. Instrument for determining the inside wall temperature and not burner flame temperature must be provided for both primary and secondary
2. An audible and visible alarm must be installed to warn the operator when the secondary chamber temperature drops to below the required
3. A carbon monoxide and oxygen meter/recorder should be
4. A smoke density meter/recorder should be
5. A solid particulate meter/recorder should be
6. Any other instrument that may be considered

 

• Location / Siting of the Incinerator

 

1. a) The incinerator must be sited in accordance with the relevant local municipal authority planning regulations and the topography of the site must be compatible with premises in the

 

• Emission Limits

 

99. Combustion efficiency (C.E) shall be at least00% where C.E = %Carbon dioxide x 100 / [% Carbon dioxide + carbon monoxide]
100. The temperature of the primary chamber shall be 800 +/- 50 degrees centigrade
101. The secondary chamber gas residence time shall be at least 1 second at 1050 +/- 50 degrees centigrade with 3% oxygen in the stack
102. Opacity of the smoke must not exceed 20% viewed from 50 metres with naked
103. All the emission to the air other than steam or water vapour must be odourless and free of mist, fume and
104. A 99.99% destruction and removal efficiency (DRE) for each principal organic hazardous constituent (POHC) in the waste feed where DRE [ ( Win – Wout) /Win ] x

100 where Win = mass feed rate of the POHC in the waste stream fed to incinerator and Wout = mass emission rate of POHC in the stack prior to the release to the atmosphere.

1. The average dioxin and furan concentration in the emission should not exceed 80mg/m3 total dioxins and furans if measured for a period of 6 to 16

 

• Ease of Use

 

1. Auto
2. No pilots to
3. Automatic control and temperature monitoring
4. Built-in skid facilitates placement

 

• Fuel Efficiency

 

1. Rapid incineration means low fuel

 

2. Up to 20kgs per hour (dependant on application).
3. Thick refractory lining rated to 1400 deg C in main chamber retains heat, increasing

 

• Quality Built to Last

 

1. Heat resistant 3mm
2. Stainless steel

 

• Key Features

 

1. Low running and maintenance costs
2. Fully Automatic and simple to operate control panel
3. Afterburner Preheat
4. Incineration Temperatures in Excess of 900 degrees C
5. 3 mm Steel Casing and Fully insulated
6. Dense Refractory Concrete Lining Rated to 1400 degrees C
7. Solid Hearth to Allow Maximum Burnout
8. Large Top Opening Lid For Easy Loading
9. Stainless Steel Flue as standard
10. 12 Months or 1000 hours
11. Optional Stainless Steel Casing
12. Heat Recovery System option

 

3.13	Fuel and Capacity
1.	Low sulphur fuel
2.	Capacity (Cubic Mtr)	.10
3.	Average Capacity	40kg
4.	Fuel Consumption (ltrs / hr)	3

 

• External Dimensions

 

1.	Length (mm)               735
2.	Width (mm)                500
3.	Height Incl. Flue (mm)	1960
4.	Door Opening (mm)	325 x 325

 

• Internal Dimensions

 

1.	Length (mm)	620
2.	Width (mm)	390
3.	Height	500

 

• Operation

 

1. Minimum Operating Temperature 950
2. Maximum Operating Temperature 1320

 

 

3.	Burn rate per hour	5-20kgs
4.	Temperature Monitoring	Available

 

 

• Particulate Removers

 

 

A mechanical particulate collector must be incorporated after secondary combustion chamber for removal of particulate pollutants entrained in the flue gas stream. The particulate collectors may include any of the following or a combination thereof:

 

1. Cyclone separator
2. Electrostatic precipitators
3. Fabric filters

 

• Chimney /Stack

 

 

• The chimney should have a minimum height of 10 meters above ground level and clear the highest point of the building by not less than 3 meters for all The topography and height of adjacent buildings within 50 meters radius should be taken into account.
• If possible the chimney should be visible to the operator from the feeding
• The addition of dilution air after combustion in order to achieve the requirement of these guidelines is
• The minimum exit velocity should be 10 m/s and at least twice the surrounding wind speed (Efflux velocity = wind speed x 2) whichever is higher to ensure no down washing of exiting
• Point for the measurement of emissions shall be

 

• Control Panel

 

1. Control of 2 burners
2. Timer control 0- 12 hours
3. Integral fan timer control
4. Temperature and thermostatic control

 

 

 

 

 

 

 

SCHEDULE 2

 

 

NO:	REQUIREMENTS	SUPPLIER’S REMARKS
1.	Experience   Previous experience in the supply, installation and commissioning of  incinerators
2.	1 Year Maintenance Contract
3.	Work rate   at least10kg per day
4.	Design   Basic Plan design to Provide Overall plant layout. With Feed chamber/ charging, Primary Combustion Chamber. Secondary Combustion Chamber. Particulate Scrubbers, Acid Gas Scrubbers, The stack/ chimney.   Fuel oil tank storage should be   Mild steel 1000 liters capacity   Chimney Height should be of 10 meters above ground level. Housing facility with one waste storage room     Provide Housing designs with adequate cross ventilation   Chamber (Afterburner Maximum exit temperature should not be less than 1100oC
5.	Standard control panel   Safety interlock, Fan Starter, Burner on/ off switch/door safety switch, Auto close down switch, temperatures control mechanism.
6.	Combustion Chambers   Primary Combustion Chamber Minimum exit temperature should not be less than 850oC   Secondary Combustion Maximum exit temperature should be not less than 1100oC

 

SECTION VII

 

PRICE SCHEDULE FOR GOODS

 

Price schedule for Supply, Installation, Testing and Commissioning of an incinerator for Turkwel Power Station

 

1	2	3	4	5	6
Item	Description	Unit of sale	Quantity	Unit price	Total price
1.	Supply, install, and commission the incinerator as specified.	LOT	1
2.	Construct a standard incinerator housing facility as per the drawing and architectural notes provided	LOT	1
4.	Construct one  waste  storage  room (provide specs on room size, construction material etc)	LOT	1
5.	Supply / adhere to  the requirement of OSHA 2007 act 49,50,51,60,61,77,78,79,80,81,100	LOT	1
6.	Onsite training of Operation and Maintenance staff.	LOT	1
7.	All the key Spares (Attach a separate List)	LOT	1
8.	Supply and install 1000 liters Fuel oil storage tank and its secondary containment with Diesel oil level indicator and necessary piping with valves for visual checking of fuel level.	LOT	1
9.	Supply of Operation and Maintenance Manuals.	LOT	1
10.	All other items not specified but necessary to complete the Installation.   A separate list of these items to be attached.	LOT	1

 

 

11.	Fencing of  a compound  of 10 meter length  by 10 meter  width   using Concrete  poles  high Gauge mesh wire , and a lockable gate. (Indicate size and design of gate)	LOT	1
	Sub Total
	Discount  (%) if any
	Applicable Taxes and Duties
	Total Cost in Kshs