Seeking advice on German Martin grate furnace technology

The combustion process flow of Martin’s mechanical grate involves the garbage transport vehicle, which, after being weighed, dumps the garbage into the garbage storage pit through a garbage discharge door. After being stored in the waste storage pit for 3 to 5 days, the calorific value increases once a certain amount of leachate moisture is removed. The waste crane transports the dehydrated waste to the feeding platform of the incinerator; after passing through the feed hopper and feed trough, the feeder pushes the waste onto the mechanical grate where it is dried, burned, completely consumed, and cooled. The residence time of waste on the grate is approximately 1.5 to 2.5 hours. Through special design of the furnace chamber structure dimensions, the use of refractory materials, and a proper primary and secondary air supply system for combustion support, the waste can ignite stably and burn completely within the furnace. The flue gases generated can remain at a temperature of over 850°C in the combustion chamber for more than 2 seconds, and the thermal loss on ignition rate of the residue resulting from waste combustion is no more than 3% (the thermal loss on ignition rate refers to the percentage of the mass reduction of the incinerated residue relative to its original mass). At the same time, an SNCR system interface is provided in the first channel of the boiler, where urea is injected to control the generation of NOx. After entering the waste heat boiler, the flue gas undergoes thorough heat exchange with the water in the boiler, producing superheated steam at medium temperature and pressure. This steam then enters the turbine generator set to generate electricity. Apart from the power used by the power plant itself, all the excess electricity generated is fed into the grid system through transformation equipment. The ash remaining after the waste has burned is collected by a slag removal machine and conveyed to a slag storage tank via belts. During this transportation process, ferrous metals are separated through magnetic separation, and then the slag is sent to the workshop for comprehensive utilization. Flue gas treatment typically employs a semi-dry flue gas treatment technology – a spray tower + activated carbon adsorption + bag filter system. Acidic gases in the flue gas are controlled by injecting lime slurry into the spray tower, while activated carbon is injected before the inlet of the bag filter to control heavy metals and dioxins. The bag filter effectively removes pollutants such as dust from the flue gas, which is then drawn out by an exhaust fan and discharged into the atmosphere through a chimney.

You can take a look at Sanfeng’s website; Martin is the person who introduced this technology