Papers by Keyword: Incinerator

Abstract: The high activity of offices, households or industries causes a lot of waste and it’s still a major problem that requires a solution with minimal impact. The combustion process is an alternative method of effective waste treatment. Incineration is a solid waste treatment process by burning at more than 800°C to reduce combustible waste that cannot be recycled, kill bacteria, viruses and toxic chemicals. Currently, the use of incinerator technology requires a lot of combustion energy from fuel oil or gas, so the operational costs are high and the the unit price is relatively very expensive. Incinerator’s design without a combustion engine, it is hoped that will save combustion energy to minimize operationals and production costs of the incinerator. The incinerator design process provides the type and yield of the incinerator, operating conditions, and the basic size of the reactor shaped of a cylindrical with a diameter of 24 cm and a height of 50 cm. The incinerator prototype construction uses assembly techniques and basic welding for metal materials and refractory cement casting. Incinerator’s Prototype testings show that the incinerator is capable to burn several types of waste, including: plastic, paper, wood, organic waste, etc. where the incinerator's combustion chamber temperature can reach 1091^OC. The incinerator’s capacity will accommodate 10 kg of waste while the processing time varies according to the kind of waste.

Abstract: Incineration is a Thermal Treatment Technology (3Ts) that could be expressed as the way to get rid of waste effectively with the reduction of its mass and volume. However, to control the combustion process efficiently, especially combustion temperature, with low energy content in Municipal Solid Waste (MSW), an additional fuel is needed and leads to increase of operating cost compared with other disposal option. High Temperature Air Combustion (HTAC) has been successfully demonstrated in a lab-scale incinerator for energy saving and pollutant reduction, especially NO_x. This article has the objective to design and manufacture the prototype scale High Temperature Air Incinerator with a capacity to treat MSW of 12 Ton per day. The system consists of an automatic feeding machine to feed the waste into the primary combustion chamber (PCC) where the combustion takes place. The push ram is used to push the burning waste and fall down to the lower hearth. Primary combustion air is supplied into PCC at the amount lower than the stoichiometric requirement to produce the combustible gas which is flown into the Secondary Combustion Chamber (SCC) located above PCC. Secondary combustion air is injected to react with combustible gas to convert to the product of complete combustion. A part of hot flue gas which is flew out from SCC is reverted and mixed with fresh air, in order to reduce oxygen concentration, before passing through the heat exchanger tube bundle which is placed inside SCC in order to exchange heat with hot flue gas. To manufacture the designed incinerator, the detail of materials used as well as the frabication method is explained. It has been shown that HTAC can be applied for thermal destruction of waste successfully, in term of energy saving and pollutant free. Benefits of this research work will promote the using of thermal treatment technology of dispose of MSW with lower operating cost and lower pollutants.

Abstract: With consideration to the acid gas incinerator burned and the problems identified during its application, renovation program has been proposed. According to the new design, draught burners with automatic control system shall be used to eliminate problems encountered during application of original burner. In addition to implement automatic control of combustion processes, the new system may minimize labor intensity and enhance safety of facilities.

Abstract: This study aimed to that waste circuit boards in batches were incinerated by thermal plasma. Firstly, the working principle of plasma incinerator and the exhaust gas treatment main process were introduced, then, the experimental results was analyzed and discussed. Due to the thermal plasma processing waste incineration furnace has high temperature (1200 0C above), all the organic ingredients in waste circuit boards, including dioxin, can be decomposed completely in a few milliseconds, no showing the secondary pollution and no producing furans and other carcinogens. In addition, after main exhaust gas (CO, NO) concentration change with time was carefully tracked, it was found that a large amount of CO gas was produced and NO gas concentration was within national safety limits during experiment. Although 44.4 kg sample was incinerated, more than 1 kg of small pieces of metal like Copper was obtained from the cooling molten slag. Finally, it was obvious that the volume and weight of molten slag was far less than the ones of sample. The experimental result has important practical significance for protecting the environment, obtaining more CO gas resource and retrieving a variety of rare metals (such as Gold, Copper, Silver, Platinum, etc.).

Abstract: A mathematical model was presented for the combustion of municipal solid waste in a 350t/d MSW-burning incinerator. Numerical simulations were performed to predict the temperature and the species distributions in the furnace, with practical operational conditions taken into account. When the total air supply is constant, reducing primary air and increasing secondary air properly results in the higher total temperature of the furnace and the more oxygen concentration at the furnace outlet, and thereby contributes to the complete combustion of combustibles so that an optimal combustion effect can be achieved.

Abstract: Incinerator is an important prevent pollution equipment on ship, usually it is used to deal with some combustible rubbish, such as waste food waste, oil dishcloth, especially dirty oil and oil sludge. Through analyze the quantity of dirty oil and oil sludge that produced on ship, and calculate the exhaust gas heat energy that can be used from incinerator, the exhaust gas heat energy has plenty of energy from incinerator, it should be utilized and it will be a new way that to improve ship energy utilization efficiency.

Abstract: Energy conservation and environmental protection is the two themes of the maritime transport development, through discussing the necessity of the incinerator waste heat utilization. Analysis the feasibility of incinerator waste heat using on ship air conditioning ,and puts forward specific technical plan to absorption refrigeration and air conditioning equipment using Marine incineration waste heat.

Abstract: Degradation by high temperature oxidation and hot corrosion is the main failure mode of components in the hot section of gas turbines, boilers, industrial waste incinerators, metallurgical furnaces and petrochemical installations etc. Corrosive environment is because of the usage of wide range of fuel containing large amount of Cl and S together with the volatile alkali metals such as K and Na which leads to the degradation of material. To obviate this problem, superalloy Superco 605 has been studied in air as well as in molten salt environment at 900°C for 100cycles. Weight change measurements were taken by a digital electronic weighing balance having accuracy of 1 mg after each cycle (heating at 900°C for 1 hr. and subsequently cooling in air for 20 min.) which was used to determine the kinetics of corrosion. The oxide scales formed on the surface of the superalloy were characterized by various techniques such as FESEM, EDAX and XRD. It was found that superco 605 shows good oxidation resistance in air at 900°C but poor corrosion resistance in simulated incinerator environment.

Abstract: This paper designed and investigated the pyrolysis combustion process of the sewage sludge, based on the combustion properties and self-sustained combustion conditions of the sewage sludge. The water content of the sludge was first reduced to less than 55% through the mechanically dewater. Then, the sludge was combusted in the pyrolysis-combustion chain grate stoker. A sewage sludge pyrolysis-combustion system was designed, with the processing capacity of 15 tons of sawage sludge per day. The results of the pilot test show that a dynamic equilibrium was reached among the drying, pyrolysis, gasification and combustion process. In addition, the emission of the pollutant reached the national standard of the pollutant discharging criteria. The system owns the advantages of less investment, low operation cost and environmental friendliness. Furthermore, the system may solve the problem of the excess sludge accumulation of the wastewater treatment plant. The waste heat can be recycled, and the burning ash can be used as construction materials.

Abstract: In this paper, some discarded circuit boards in the plasma incinerator were incinerated by the converging - extended anode channel plasma torch, whose work principle and composition was described, and two experimental results were described, finally, the percentage of four major exhaust gas (CO, NO, SO₂, O₂) was reported, showing a good prospect on treating electronic waste with using the plasma torch.