Abstract:
The method aims at obtaining from waste and more particularly from municipal solid waste (MSW) the energy contained therein at the highest level for industrial use by means of natural technologies and with low environmental impact. The method, denoted by the acronym NEW (Natural Energy from Waste) operates through the following process phases: a) aerobic digestion of the putrescible biological part to produce stabilised waste which is easy to handle, b) separation of a fraction rich in materials with a high heat value, c) storage of the residue, rich in biodegradable and inert substances, compacted into appropriate geometrical shapes in bioreactors which can be activated and sealed, d) activation of the bioreactors with water and their service in time during anaerobic digestion to supply biogas to be used for the production of energy, e) bio-stabilisation and dehydration of the residual material of the anaerobic treatment with air, f) possible recovery of the materials produced in this way. In this way the energy contained in the waste, is extracted at the most refined level in the form of plastic, plastic/paper and methane for energy uses with maximum yield and reduced production of ash, and the end material leaving the bioreactors is fully exhausted of its energy content and inertised.
Abstract:
Provided are a method of treating coal ash by mixing it with water, in which the coal ash and water undergo a temperature difference therebetween while they are mixed; and a method of desulfurization in a coal combustion boiler system, which comprises mixing coal ash that has been separated from a ash collector in the system, with water on the condition that the two undergo a temperature difference therebetween while they are mixed, and circulating the resulting mixture that serves as a desulfurizing agent into the coal combustor in the system. The desulfurization capability of the desulfurizing agent used in the desulfurization method is higher than that of the desulfurizing agent obtained through hydration of coal ash with water or steam.
Abstract:
An apparatus for recycling municipal waste as energy includes a shredder for shredding the waste, and removing rejects, the rejects from the shredder being sorted into a first stream of inert matter that is substantially unpolluted with organic matter and into a second stream of inert matter that is substantially polluted with either organic matter or with combustible heavy elements; a first outlet for removing the second stream of inert matter; a circulating fluidized bed reactor for receiving the shredded waste and producing gases with solid particles therein; a cyclone for separating out the solid particles and receiving the gases output by the reactor; a recuperator boiler into which the gases output by the cyclone are discharged and which is provided with a first set of heat exchangers, the boiler including a dust-filtering hopper; a second outlet for removing the solid particles from the dust-filtering hopper; a second set of heat exchangers disposed in a chamber into which the gases are fed after transition the boiler; a final treatment apparatus for treating the gases and producing solid matter, after the gases transit the chamber; a third outlet for removing the solid matter resulting from the final treatment apparatus; and an independent melting and vitrification furnace which is connected to each of the first, second, and third outlets by a respective controlled pipe.
Abstract:
The present invention is directed towards an apparatus and method for harnessing energy from waste materials (102) using a pyrolysis assembly, whereby the pyrolysis assembly comprises a pre-pyrolysis treatment plant (104), a pyrolysis plant (120), and, a fuel-based energy plant(136). Waste materials having at least 30% biomass by weight are fed into the pre-pyrolysis treatment plant and the biomass is separated from the waste materials in the pre-pyrolysis treatment plant. The biomass is chemically cracked into at least a char and a gas in the pyrolysis plant and this char and gas is used by the fuel-based energy plant to harness energy from the waste materials. Problems associated with the efficiency of pre-pyrolysis treatment plants and safety of the parts used in the pre-pyrolysis treatment plants is addressed in the current invention
Abstract:
A system for disposing of municipal solid waste (10) provides commercially-available equipment that is modified to initially remove identifiable unwanted components from the waste (12), and then chop the waste into small pieces (16) of a size suitable for handling and combustion. The moisture content of the waste is reduced in a closed system (20) by passing dry air through the waste in a confined space (30) to absorb moisture and produce moist air, which is then dehumidified via refrigeration equipment (34). The dehumidified air is recycled (30, 40) through the waste repeatedly through the closed system (20) until the water content has reached the predetermined amount. The waste is stored in a bunker (41) for later burning, or is immediately burned in a furnace (24) to produce heat that is used to produce steam (50), which drives a generator (26) to produce electricity (52) that is partly used to power the process and partly sold commercially.
Abstract:
산업용 연소설비로 공급되는 연료 유량계로부터의 신호에 의해, 산업용 연소설비의 운용 상황을 파악하고, 폐액의 유량을 정확히 나아가 적절히 콘트롤함에 의해 저연소시·연소정지전·착화직후 미처리 폐액의 배출을 방지함과 동시에 폐액의 혼합에 동반하는 연료계나 연소실이나 연도(煙道)등으로의 악영향을 방지하고, 폐액의 종류나 연소설비에 따라 최적의 폐액처리를 실현할 수 있다.