Deccan Mechanical & Chemical Industries Pvt. Ltd. Bhosari, Pune, Maharashtra

SSC provides an ideal solution for handling very hot Bottom Ash from Coal fired boilers and Hot Kiln Dust from Steel Plants. These materials which are in red hot condition when discharged are difficult to safely handle by any other means than SSC. In case of Coal fired boilers DEMECH system requires less water thereby saving water and also needs lesser headroom below the furnace. The hot Economizer Ash and the Pyrite rejects (coal mill rejects) can also be discharged to the SSC installed for handling Bottom Ash, in turn saving of a problematic separate system for these materials.

CHROMAX wear plate by DEMECH is a composite plate, manufactured by a unique process in which a uniform layer of highly wear resistant carbides is deposited on a carbon steel base. Very hard carbides are suspended in a tough wear resistant matrix. It is the concentration & uniform distribution of carbide structure that gives CHROMAX Wear Plate its unique wear resistant & life prolonging characteristics.

Demech has entered into technical collaboration with Hitachi Power Europe GmbH (HPE), Duisburg, Germany; to manufacture Gravimetric Coal Feeders. This gives Demech the unique advantage to supply Gravimetric Coal Feeders using the proven and reliable designs of Hitachi Power Europe GmbH. HPE – a subsidiary of Hitachi, Ltd., designs and constructs fossil fired boilers for power generation. They have been the world class quality manufacturers of all the key components of such as utility steam generators, Environmental engineering, Turbines, Pulverisers, Ash Handling systems. The major function of Gravimetric Coal Feeders is to continuously feed specified required quantity of raw coal from the overhead bunkers to the coal pulveriser.

Demech has entered into technical collaboration with Hitachi Power Europe GmbH (HPE), Duisburg, Germany; to manufacture Gravimetric Coal Feeders. This gives Demech the unique advantage to supply Gravimetric Coal Feeders using the proven and reliable designs of Hitachi Power Europe GmbH. HPE – a subsidiary of Hitachi, Ltd., designs and constructs fossil fired boilers for power generation. They have been the world class quality manufacturers of all the key components of such as utility steam generators, Environmental engineering, Turbines, Pulverisers, Ash Handling systems. The major function of Gravimetric Coal Feeders is to continuously feed specified required quantity of raw coal from the overhead bunkers to the coal pulveriser.

DEMECH have been one of the pioneers in India to manufacture and supply En-Masse & Drag Chain Conveyors. Slow moving chains in these conveyors influence the material to move gently through a closed duct in a horizontal or even in steeply inclined profiles. These can handle virtually any type of bulk material in an environmentally safe way due to its dust-tight and spill proof, totally enclosed construction. These conveyors are heavy duty and of rugged construction. The conveying profile can vary from Horizontal to near vertical direction. The material is conveyed with 'En-masse' effect or 'Drag' effect. En-Masse conveyors give cost advantages due to their low power consumption, compact size & low maintenance requirements.

Slow moving chains in these conveyors influence the material to move gently through a closed duct in a horizontal or even in steeply inclined profiles. These can handle virtually any type of bulk material in an environmentally safe way due to its dust-tight and spill proof, totally enclosed construction. These conveyors are heavy duty and of rugged construction.The material is conveyed with 'En-masse' effect or 'Drag' effect. En-Masse conveyors give cost advantages due to their low power consumption, compact size & low maintenance requirements.

Double Cone Flap valves are used for controlled feeding as well as achieving air lock sealing. These valves consist of two independent Cone Flap valves mounted one upon other with their opening and closing alternated and synchronized to ensure that only one valve opens at a time. DEMECH manufacture these valves to suit the opening sizes and required through-put rate. The through-put of these valves depend on the holding volume of the upper valve chamber and the rate of operations. These are very slow operating valves as the operation cycle rate does not usually exceed beyond 6 cycles per minutes. Thus these valves have a batch feeding pattern rather than continuous feeding. Selection of Cone or Flap depends on the characteristics of material to be handled and system requirement like pressure sealing. Cone valve has a better sealing than the Flap valve. However, in smaller size valves the Cone can act as an obstruction in the flow resulting in clogging of the small opening. The Cone valves usually have round opening whereas the Flap valves can have square.

Screw conveyors are used to convey the material continuously with the help of a rotating helical screw blade (known as flights) by shear and tumbling effect inside a U shaped trough or a round tube. They are generally used for handling fines of coal, crushed material, powders, cement, chemicals etc. The periphery of leading side of the helix is provided with hard face welding for handling abrasive material. We offer screw conveyors in standard and customized solution to address varied requirements.

DEMECH manufactures a wide range of high alumina ceramic liners such as tiles, special shapes and pipe sections which have high alumina content and wear protection properties. These liners are bonded on to steel surfaces and are extremely effective for prevention of wear and tear due to high particle velocity, impingement, abrasion and impact. They are extensively used for lining of equipment prone to severe wear in core sector industries such as cement, steel, power. Demech manufactures ceramic tiles in the form of weldable and pastable tiles as well as pipe sections of various diameters for installation at site and more specifically for lining of fabricated pipes, bends and fittings for pneumatic conveying applications specially for conveying of pulverised coal in thermal power plants

Basalt is a volcanic rock possessing ideal properties like inertness coupled with excellent resistance to corrosion and abrasion. After selective quarrying the rock is melted at a temperature of around 1500 degree C and cast into molds or spun into cylinders. The castings so produced are then subjected to heat treatment cycles in special kilns to produce re-crystallized basalt. The product thus produced inherits inertness of parent materials. Its microcrystalline, non-porous texture being denser and more homogenous than raw basalt, it acquires exceptionally high abrasion resistance.

DEMECH provides variety of systems to handle Bottom Ash or Bed Ash generated by the solid fuel fired boilers. The system has to be selected based on many factors like type of boiler, size of boiler, amount of Bottom ash generated, method of final handling etc. Factors like availability of other resources like water, land etc. also need to be considered while selecting the system. DEMECH can supply following systems, Intermittent operating system using water impounded Bottom Ash Hopper with Hyjector and slurry disposal to pond or to Hydrobin.Continuous operating Submerged Scraper conveyor to removal of Bottom ash.