Over the years, we have realized that certain ancillary equipment complementing incinerators need to be specially designed to meet the requirements of the application.  This might take more time than the incinerator manufacture itself, but need to be carefully designed as these equipment are meant to facilitate ease of operation and maintenance with an eye always on safety of the operators.  The result appears simple, but the design is really complex.  We give below details of some of these equipment.

1.      Ejector Mechanism

This is provided in many of our incinerators for burning capacities beyond 50 kg/h and whether or not mentioned in the RFQ. The main features of this ejector mechanism are that it forces additional air for cooling the flue gas as well as for creating negative pressure in the combustion chamber.  The flue gas that comes out of the incinerator’s secondary chamber will be at a temperature of about 1000°C and this mechanism enables this temperature to come down to around 200-300°C.

The combustion chamber has to be maintained under negative pressure as per regulations and also to prevent any leakage of flue gas from the charging / ash doors.  This also provides safety to the operators since any positive pressure present will result in flames shooting out through the charging door when it is opened, endangering the operator’s safety. 

The ejector mechanism is a complex one requiring use of high temperature resistant steel at the exit of the flue gas from the secondary chamber followed by refractory lining through the flue gas path.   The design of this mechanism is enabled by special software which decides its construction based on velocity, volume and pressure requirements. 

We have been using this successfully for the past many years.

2.      Jacketed Design (for chambers)

Some of our incinerators are of a jacketed design, particularly the SWR model.  This results in the skin temperature of the chamber being very low at around 30°C while the inside temperature is about 1000°C.  This is particularly essential because people on board ships are likely to come in contact with the surface of the incinerator and hence designed especially for this purpose.  The second function of this is to cool the outgoing flue gas to around 200-250°C with the help of an ejector.

The design of this is very complex because we have to design for uniform flow of atmospheric air along the entire inner surface of the incinerator chamber, tracing its path from the fan to the ejector.  This requires routing the flow in such a way that no area is left uncovered.  In our SWR model we use a fan for this purpose.

This design ensures:

·        negative pressure in the primary chamber

·        combustion air in the primary and secondary

·        cooling of the outer surface

3.      Jacketed Design (for Fuel Tanks)

We are also using, on a case to case basis, a jacketed design for fuel tanks to provide secondary containment.  In the event of any leakage of the fuel, we are required by the client to provide drip trays for this purpose, but in some cases specifically jacketed designs are asked for instead of drip trays.

4.      Ram Loaders

We have been using for more than 15 years, our specially designed ram loaders and hundreds of incinerators have been supplied with the ram loader.

The ram loader is provided with a vertical door and a horizontal door with hydraulic cylinders pulling and pushing.  The ram loader enables frequent loading of the waste without the danger of the operator coming in contact with the flame inside and having no contact with the chamber.  In some cases, even the top of the hopper is controlled hydraulically.

This is a very successful design which we have adopted over the years.

5.      Ram Pusher

In some specific cases we are asked to provide de-ashing ram pushers to remove the ash.  This is a simple enough design which we have successfully carried out.  This is working in a number of instances and some of these are working in Oil Drilling hazardous areas.

All these special features /design that we have talked about are meant to achieve:

·        safety to the operator

·        ease of operation

·        simplicity in maintenance

·        increase productivity