Combustion Chamber

The chamber is made up of firebrick materials, which can resist very high temperatures up to 1500C, as an inner wall (lining), followed by an insulating wall, which is then enclosed in a metal cage. The Bricks used are standard: 23 cm x 11.5 cm x 7.5 mm. The metal cage uses heavy duty metal plates (8-10 mm thick). The lining is applied throughout the inner parts of the chamber.
The chamber is provided with a heavy duty grate on which the waste (packed in bags) is loaded.Loading capacity: We are able to design, fabricate and install incinerators with chamber capacity ranging from 75 – 1000 kg waste per hour (depending on customer’s needs), which can be destroyed to ashes in about 40 minutes, when heavy duty burners supplied by our organization are installed.After loading waste, the heavy duty door is used to close the chamber tightly, until all the waste has been destroyed. The door is provided with heavy duty hinges for longer operation. The door is opened only to remove the ashes. The burners are started once to door has been fully closed.

High-Efficiency & Heavy Duty Industrial Burners

The burners installed in our system are of heavy duty industrial type, capable of raising the temperature in the chamber to the required level in a very short time (15 minutes).The burners use diesel oil as an auxiliary fuel, and when the temperature reached optimum, the photo-sensor cuts off fuel supply, thus saving on fuel oil consumption. However, it restarts automatically if the temperature falls down again.

Depending on chamber size, a secondary chamber can be provided, which receives flue gas from the primary chamber and completes the combustion process, leading to cleaner flue gas.

However, the heat from the secondary chamber adds up the exit heat, leading to requirements for heavy duty cooling, and hence, faster generation of hot water.

Cooling System and Hot Water Generation

As a result of high heat content in the exit gases, we have developed a hot water supply for the health facilities utilizing our technology.
This technology uses circulating clean water to cool the hot gases from the chamber. The purpose of cooling the flue gases is to prepare the latter for scrubbing, which has to take place at lower temperature to avoid excessive scrubbing losses due to evaporation. The water tank becomes hot at the end of the incineration cycle.
Fortunately, this water can be made into several uses in the hospital, including:

1. Hot water bath for patients, especially in cold climates
2. Cleaning and sanitation in the theater rooms
3. Cleaning and sanitation in the sluice rooms
4. Hot water supply to the laundry machines, thus saving money used to raise the temperature of the water during cleaning of linen.

The tanks must be re-filled with clean water again before another cycle can be started.

Multi-Stage Scrubbing Technology for Smoke Cleaning

The gases and fumes (smoke) produced during incineration are cooled in a series of heat exchangers (water cooled) and cleaned in a multi-stage wet scrubbing system.
The scrubber(s) performs the following duties, as an environmental and public health promoter:

Elimination of Toxic Gaseous emissions

• Acid gases – HCl, NOx, SO₂
• Organics or hydrocarbons – Dioxins (PCDDs), Furans (PCDFs) categorized as products of incomplete combustion (PICs)
• Particulate matter (PM) – PM2.5, PM5, PM10, Fly ash and soot.

The remaining components are oxygen and nitrogen only, which have no hazardous effects for human health and to the environment. Because of high temperature incineration (900C), the ashes produced are completely burned without chemicals.

Our organization will test the smoke exiting the scrubbing unit and provide a certificate the facility owner, for environmental auditing purposes.

Contaminants in Spent Wastewater

The water is mixed with alkali, to render the pH about 12, so that the acid gases can be eliminated by neutralization reaction. The remaining solution can be discarded in the sewer once the pH drops to about 8, or when the water becomes dirty due to solids.

Elimination of bad smell

Incineration of biomedical waste is coupled with generation of bad-smelling fumes. The system we provide works under air tight conditions, so that all the fumes are directed to the scrubbing section. The smell is also eliminated in the same way.

The water or scrubbing solution returns back to respective tanks via pipes connected from the scrubber bottom to the openings of tanks.

Occupational Health and Safety

Our focus was on Occupational Health and Safety issues. The operators, together with training, they are provided with a system which is operated by using a control panel, and are not exposed to high temperatures. The combustion chamber walls are made up of firebricks and metal plates, between which there is a space filled with a heat resistant materials to prevent the outside environment from high temperatures. The process is air tight, such that there is no risk of smells and all is required is a properly working sewage system and a single phase power supply (240V/13 amps).

The required operator skills are minimal, preferably Form Four leaver, who can be trained for on-off operation. The only important task is to service the burners, lessons of which are part of the training provided.

Pump Station and Tank Yard

The High-Tech medical waste incinerator is coupled with at least two tanks, for the purpose of:

• Supply of cooling water to the hot water generator
• Supply of scrubbing solution to the scrubber for smoke cleaning.

Each tank is coupled with a single-phase pump, which is connected to the respective tank by a galvanized pipe. The power supply for pumps is through the control panel.
Additional tanks can be installed depending on the size of the chamber when an additional scrubbing stage is required.
The tank yard consists of tanks supported by a metal stage which can also be made of concrete slab