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combustion chamber and one

flue gas afterburning chamber. The incinerator must be able to satisfy the following parameters:

 

1. Treatment capacity of: a) 50 kg waste per hour.

 

2. Temperature: Main combustion chamber up to 850°C, and in the second chamber > = 1,100 °C

 

3. Retention Time: 2 seconds from the second chamber

 

The furnace (including secondary combustion chambers etc.) dimensions have to be large enough to provide for an effective

combination of gas residence time and temperature such that combustion reactions may approach conclusion and cause

low and stable CO and VOC emissions.

 

to be able to avoid the generation toxic gases, the incinerator must combine the gasification or pyrolysis stage with a

subsequent combustion phase with flue-gas treatment that provides for operational emission levels to air within the

related emission ranges defined in the criteria

 

 

for incinerators that are explained in the ENVIRONMENTAL MANAGEMENT AND CO-ORDINATION (WASTE MANAGEMENT) REGULATIONS

2006 of the Republic of Kenya.

 

Where grates are used, it is preferred that the design incorporates adequate cooling of the grate such that it

allows the variation of the principal air supply for the main purpose of gas control, rather than for the heating

of the grate itself. Documents to be provided by the Bidder in response to this RFP.

 

 Complete information on how the equipment matches the Technical Specification. Include an additional statement with

a calculation and description of all cost related to the normal running of the plant over a 12 month period.

 

Full description of the system(s) being proposed.

 

Lay out drawing with all main equipments, flue gas ductwork and chief piping.

 

Piping and Instrumentation Diagram.

 

Operation guide in the English language.

 

Material lists.

 

Implementation program and training idea.

 

Installation and maintenance program.

 

Detailed list associated with spare and wear part package for 2500 h operation (items that will be included in the

contract). The listing should be detailed enough to allow PATH to perform a cost estimation.

 

Additional details like process description, brochures, etc. should be added if the data will be useful

for the technical evaluation of the treatment process.

Guide autoclave with vertical loading; gravity displacement type with possibility for Vacuum.

 

Capacity:      Up to 12 kg/h

 

Chamber size:      >150 Dimensions

 

Material:       Stainless steel

 

Temperature:       134 °C

 

Additional information:

 

Minimum autoclave room size shall be 150 liters and shall have a usable quantity (loading basket) of 100 liters.

Shall work based on gravity air displacement principle.

The vacuum system shall be of a thermal shock kind.

 

The pressure vessels ought to be pressure tight, the rising of the pressure (at a start pressure of below 80 mbar)

shall be lower than one mbar/min.

 

With in-build electrical heating elements for steam generation (heating elements > 4000 Kw).

Chamber and door shall be made from high quality stainless steel (e.g. AISI 3161).

Chamber in vertical position, it shall enable a simple loading/unloading of this loading basket. The baskets shall be made for the

usage of non-heat resistant waste bags, a system for the collection and controlled release of free liquids and

condensate in the waste shall be integrated.

The temperature measured at the reference measurement stage of the treatment room shall not be lower than 105°C

(TDes 0+4). The treatment time shall be ≥30 minutes at 105°C, ≥20 minutes using a temperature used of ≥121°C (TDes

0+4) and ≥10 minutes using a treatment temperature of ≥ 134.

The steering of the treatment process should be semi-automatically in addition to manual.

The Treatment Equipment shall be equipped with the following instruments:

o   treatment room temperature indicating instrument

otreatment room pressure indicating instrument

For the treatment of the outgoing air, a HEPA filter in combination with a condensation system should be used.

The filter shall be constructed in a manner that a disinfection of the filter shall be possible in an integrated condition.

 

The filters must be heat resistant, steam resistant, hydrophobic and pressure resistant for the pressure difference.

 

Cooling down phase after treatment ought to be existent; the temperature of the waste should be not higher than 80°C

after completing the cooling down process.

The pressure vessel should be equipped with a heating insulating material, the maximum outer surface temperature should be < 50°

after finishing the cooling down process.

The pressure vessel should be equipped with a heat insulation, the maximum outer surface temperature should be < 50°