Oil Fired Incinerator

Oil Fired Incinerator

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Description:

CONSTRUCTIONAL DETAILS OF "ALFA-THERM" OIL FIRED INCINERATOR
Incinerator is of twin chamber design, where refractory lined chambers are either mounted on top of each other or placed separately. Volatilisation of waste is achieved in primary chamber through supply of air through various nozzles on all sides of the primary chambers. Heat is generated with fuel oil burner with auto operation system. Waste is to be fed inside the primary chamber of the Incinerator manually. However, automatic waste feeding system is also available.
Volatilised/gasified matters from waste is taken to the secondary chamber with residence time of minimum 1 second. The heat source in this secondary chamber is auto controlled fuel oil secondary burner. After the gases leave the secondary chamber, they enter the venturi scrubber where gases are treated with caustic and scrubbed. A re-circulating pump of stainless steel construction is provided in the system for circulation of caustic and water inside the scrubber. The re-circulation pump is common for the scrubber and droplet separator. All the interconnecting piping is of stainless steel. The gases finally enter the droplet separator wherein the moisture is removed from the gases. This reduces the flue gas temperatures making it safe to be let out in the atmosphere. An I.D. Fan is provided at the end to release the gases to a 30 mtrs high stack.
In the incineration process, the waste is thermally decomposed in the primary chamber at a temperature of 800¡À500 C. The gaseous products (volatile mater) are completely oxidised in the secondary chamber due to sufficient residence time, high temperature (1050¡À500 C.) high turbulence and 100% excess air. The flame port through which the gases pass from primary chamber to secondary chamber is sized to produce high velocity for excellent mixing of combustion air and gases.
Both the chambers are fitted with burners to fire support fuel for initial heating up of chambers to required temperatures as well as maintain these temperatures.
SAFETIES & CONTROLS
The Primary and secondary chamber burners are oil fired / gas fired package type. This arrangement keeps combustion to absolute optimum which makes burner operation safe and sound and trouble free. The burners operate on On-Off basis depending on the temperature settings in respective TICs.
Primary burner operation has an electrical interlock with door opening limit switch. As soon as manual waste charging door is opened while the incineration is in process, primary burner goes off thereby avoids accidental hot gas volatiles coming out of Incinerator.
The Burners are interlocked with respective chamber temperatures and have the feature of On-Off with temperature signal from the respective digital temperature controllers.
Incase of any malfunction in the unit, the entire unit consisting of F.D. Fan, I.D. Fan and primary and secondary chamber burners comes to standstill.
The control panel has burner management system, audio visual alarms for any abnormal operation safe and sound. The fault is automatically indicated.
The I.D. Fan, F.D. Fan and burners automatically trip incase the outlet temperature of the venturi scrubber exceeds 80oC. This avoids any damage to the downstream equipment.
I.D. Fan failure trips the burner and F.D. Fan automatically.
Recirculation pump failure trips the I.D. Fan, F.D. Fan and burners.
Pressure switch in the recirculation water tank trips the I.D. Fan, F.D. Fan and burners incase of low water pressure.
CONTROL PANELThe control panel supplied alongwith the Incinerator is placed separately. It houses the primary and secondary burner controls, primary and secondary chamber temperature controllers, motors starters, re-circulating pump controls, isolator switches, overload relays for burners and fans, flue gas temperature indicator and audio visual alarms for abnormal workings.
"ALFA-THERM" INCINERATOR CONSISTS OF :
Main Combustion Chamber/Primary ChamberThis is fabricated out of Mild Steel and is refractory lined and insulated from inside. This is equipped with loading door, ash removal door and automatic burner operated by temperature indicating controller which is set at 800¡À500 C. High pressure air from a blower is provided through a number of nozzles fitted in the walls of the primary chambers. Since refractory is very thick and air is circulated within the chamber, it ensures a very low skin temperature of the Incinerator. The primary chamber is provided with a waste charging door and separate ash door for removal of ash from the Incinerator.
Post Combustion Chamber/ Secondary ChamberThis is also fabricated out of Mild Steel and refractory lined similar to primary chamber. This is equipped with automatic burner. A temperature controller is provided, which is connected to the control panel. The operating temperature is 1050¡À500 C. Minimum 1 second residence time is provided for flue gases in this chamber. The residence time can be increased on custome