Combustion Study of the Incineration of Major Components of Infectious Waste in a Controlled-Air Incinerator : The Influence of Bed Temperature and Feed Rate on The Evolution of Temperature and Gaseous Emission

Name: Phaisan Lertsalaluck

Organization : King Mongkut's University Technology Thonburi. The Joint Graduate School of Energy and Environment. Department of Energy Technology

keyword: Controlled-Air Incinerator

; Solid Combustion

; Infectious Waste

; Operating Parameters

Abstract: Infectious waste refer to a class of discarded materials is contaminated with disease so that special treatment is needed for its disposal. Incineration is a common method used to treat the infectious waste in Thailand because of high performance and low cost. The Pollution Control Department (PCD) , Ministry of Science and Technology and the Waste Incineration Research Center (WIRC), King Mongkut's Institute of Technology, North Bangkok cooperated to study and develop infectious waste incinerator in Thailand. A controlled-air infectious waste incinerator is designed and constructed ; at Samparn hospital, Nakornpathom province, Thailand, with destruction rate of 50 kgs per hour. Primary and secondary combustion chambers are designed to reduce volume, mass and also destroy disease in the infectious waste. Operating parameters are considered as an important function to operate the infectious waste incinerator with high performance of waste destruction and optimum polluted gaseous emission. Simulated infectious waste, which major components are cotton56.59%, plastic (syringe) 11.36% , rubber gloves 10.55% and water 21.50 % by weight, is burnt in the infectious waste incinerator in order to study gas evolution from the controlled-air incinerator. Preheated temperature and waste feed rate are the main operating parameters tobe investigated. The experiments were performed for the primary combustion chamber temperature (T1) varied at 500, 600, 700, 800 C and initial temperature of secondary combustion chamber (T2) started at 900 C with the simulated infectious waste feed rate at 5 kg/batch and 10 kg/batch respectively. T1 variation and concentration of gaseous from the exit stack of the controlled-air incinerator; carbon (CO) and oxygen(O2) was measured. Results show that higher T1 directly affected the to burning period of a batch of waste feed rate but T1 700 C of waste feed rate at 5 kg/batch gave a shorter burning period than other conditions.T2 evolution followed to evolution of T1 because combustion in secondary used pyrolysis gaseous from primary combustion chamber. The higher T1 increased pyrolysis gaseous emission rate which were reacted with O2 in secondary combustion chamber. CO evolution from preheated temperature about 700C at the waste feed rate of 5 kg/batch is less than others preheated temperature; 500, 600, 800 C at the waste feed rate5, 7.5 and 10kg/batch. The incinerator destruction rate is neary the designed destruction rate. The evolution of O2 is reversed to CO evolution, O2 concentration is reduced, while CO concentration is increased. This study could indicate that an optimization condition for this incinerator should be at about T1 700 C and waste feed rate of 5 kg/batch while fixed parameters of T2 , fresh air supply volume shall follow this research. Study results will be of benefit to further study of an optimization operation and develop additional controlled-air infectious waste incinerators in Thailand.

King Mongkut's University Technology Thonburi. Library

Address: Bangkok

Email: info.lib@mail.kmutt.ac.th

Name: Somrat Kerdsuwan

Role: Advisor

Created: 2001

Issued: 2007-02-08

Modified: 2007-03-09

วิทยานิพนธ์/Thesis

ISBN: 9749635655

CallNumber: JGSEE67

eng

DegreeName: Master of Philosophy

Level: Master's Degree

Descipline: Energy Technology

Grantor: King Mongkut's University of Technology Thonburi

©copyrights King Mongkut's University of Technology Thonburi

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