Abstract:
A combined treatment process of domestic garbage and sewage, comprising the following steps: {circle around (1)} sorting iron out of the domestic garbage; {circle around (2)} crushing the domestic garbage in which the iron has been removed; {circle around (3)} feeding the crushed domestic garbage into a sewage treatment tank, adding water and blowing air into the sewage treatment tank, where the domestic garbage is divided into floating substances, suspended substances, and settled substances; {circle around (4)} salvaging, dehydrating and drying the floating substances and then combusting them as fuel; {circle around (5)} collecting, filtering and drying the settled substances, wherein the settled substances having a calorific value of more than 4180 kJ/kg are burnt as fuel, the burnt substances and the settled substances having a calorific value of less than 4180 kJ/kg are used to replace clay material in a cement plant or used for making bricks; {circle around (6)} adding a flocculant into the sewage in which the floating substances and the settled substances have been removed so as to make the suspended substances settle, the suspended substances which have been settled are treated according to step {circle around (5)}; and {circle around (7)} treating the sewage. The process of the present invention effectively combines the domestic garbage treatment and sewage treatment, realizing the comprehensive treatment of domestic garbage and sewage as well as efficient utilization of resources.
Abstract:
Char-handling processes for controlling overall heat balance, ash accumulation, and afterburn in a reheater are provided. Carbonaceous biomass feedstock is pyrolyzed using a heat transfer medium forming pyrolysis products and a spent heat transfer medium. The spent heat transfer medium is separated into segregated char and char-depleted spent heat transfer medium. The char-depleted spent heat transfer medium is introduced into a dense bed of heat transfer medium fluidized by a stream of oxygen-containing regeneration gas. All or a portion of the segregated char is combusted in the dense bed using the stream of oxygen-containing regeneration gas. A portion of the segregated char may be exported out of the pyrolysis system to control the overall heat balance and ash accumulation.
Abstract:
A carbonization process of rubber products, such as shredded waste tires, in a sealed carbonizing vessel whose operating pressure is below atmospheric pressure and under controlled high temperature environment while continuously being moved in a defined path at a controlled speed thus enabling the shredded tires to be fed constantly into the vessel while the by-products of the carbonization process are continually discharged.
Abstract:
A method for processing material that contains biomass. The material is led onto a conveyor. The conveyor conveys the material to an apparatus for mechanical processing and/or to a further processing plant. The moisture content is measured and/or the size of pieces of non-combustible material and/or the content of non-combustible material in the material flow is measured in connection with the conveyor. Based on at least one of the measurements, material is conveyed to the material to be conveyed for further processing and/or to the apparatus for mechanical processing, or to at least one material to be conveyed elsewhere than to the further processing plant or the apparatus for mechanical processing. Also a system for processing material that contains biomass.
Abstract:
The present invention relates to a carbonization process of rubber products such as shredded waste tyre and the like in a sealed carbonizing vessel (200) whose operating pressure is below atmospheric pressure and under controlled high temperature environment while continuously being moved in a defined path at a controlled speed thus enabling shredded tyre to be fed constantly into the vessel (200) while the by-products of the carbonization process are continually discharged.
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.