PROCEDURE FOR THE REFUSE INCINERATION

The invention concerns a procedure for the refuse incineration, in particular for special refuse burn, whereby the waste is brought into a rotary kiln, burned in this under education by cinder and flue gas and cleaned the flue gas, as well as a plant for the execution of the procedure. A procedure of this kind is from the document of “treatment of special refuse 1” of Thom - Kozmiensky, pages 193 to 207, EF-publishing house well-known for Energieund environmental technology GmbH. With this procedure pasty and firm of special refuse materials, among other things also highly toxic materials are burned, together with air. Hiebei the developing flue gas is led into an afterburner and after-burned together with liquid waste materials. Hiebei can be supplied also waste water, which causes a cooling of the flue gas. The flue gas withdrawing from the afterburner is energetically used afterwards in a boiler and led further over a gas cleanup plant into a fire-place, of where it emits. With this procedure the cinder resulting in the rotary kiln is unfavorable. This exhibits relatively high carbon content of usually more than 3%. It is irregularly out-reacts and exhibits further still unburned SonderabfalI inclusions. A dump of the cinder is problematic, since the carbon of the cinder reacts with the oxygen of air to CO2. In such a way formed carbon dioxide is säuerlich and commits themselves in further consequence with water to carbonic acid, which causes a loosening of the heavy metals from the cinder. The arrears from the gas cleanup plant represent a further disadvantage of this procedure, which must be disposed of particularly. A destruction of the organic compounds existing in the exhaust gases is problematic, since in the torque tube only temperatures of approximately 1000 ' C predominate. The invention aims at the avoidance of these disadvantages and difficulties and places themselves the task to create a procedure as well as a plant to the execution of this procedure with which the disposal is possible from highly toxic waste materials. It is to result here dumpable cinder, with which also during Langzeitlagerung no danger for the environment is given. In particular the cinder is to be cheaply dispose ofable, require thus no special preventive measures with the dump. Further a disposal of the arrears from the gas cleanup plant in simple way and better energy utilization of the energy reserves existing in the waste materials are to be possible. This task is solved with the procedure in the initially described kind thereby that the still verbrennbare arrears containing cinder in a beaconed gasification reactor of a high temperature gasification is submitted, whereby the cinder between beaconing the reactor and a coal bed filter is up-poured and the degassed cinder is let solidify melted and glassily. A gasification reactor with a burner, a coal bed filter and an intermediate made bed of fuels is well-known from at-B 382,388 and from at-B - 388,925. By the combination according to invention the treatment of waste materials in a rotary kiln with a high temperature gasification of the cinder resulting in the rotary kiln succeeds in out-to-acting the cinder completely so that it exhibits last end a carbon content of less than 0.1%. The gas developing during the high temperature gasification is practically free from organic compounds and can be used as heating gas industrially. By the process temperatures of for instance 1600°C, developing during the high temperature gasification, succeeds to liquefy the cinder out-reacted and letting they solidify as granulates glassily. Hiedurch is no longer possible a leaching of the cinder brought on dump. With burning the flue gas appropriately the gas developing during the high temperature gasification is transmitted to the afterburning zone, burned in this zone and cleaned the exhaust gas together with the after-burned flue gas. Hiedurch succeeds a particularly simple utilization with that, to 45 high temperature gasification of developing gas, since this does not have to be cleaned in its own gas cleanup plant, but by those the torque tube assigned gas cleanup plant can be led, so that substantial cost savings result. Inflammable liquid waste materials in the gasification reactor are burned favourably. Hiedurch can be disposed of solvents and waste oils etc. economically, whereby by the high temperatures in the gasification reactor organic compounds are decomposed reliably, so that an endangerment of the environment is avoided. Inflammable liquid waste materials are used favourably for the afterburning of the flue gases, whereby succeeds increasing the temperature in the afterburning zone to approximately 1200°C so that also here organic compounds are decomposed. Appropriately waste water is supplied to the afterburning, whereby the firm waste material particles, which are contained in the waste water, in the afterburning plant are burned. The Wasseranteil of the waste water is easily compensated evaporated, whereby the temperature in the afterburning zone, however this loss of temperature is lowered by the exhaust gas introduced from the high temperature gasification and by the RK 398,121 B introduction by inflammable liquid waste materials into the afterburning zone, so that again to decomposition of the organic compounds necessary 1200 ° C are reached. The arrears, in particular filter types of dust, are supplied favourably from that to the rotary kiln subordinate gas cleanup of the high temperature gasification after separation of the easily volatile heavy metals, whereby with difficulty volatile heavy metal arrears can be disposed of reliably, since these heavy metals are cast in the cinder melted during the high temperature gasification, if this solidifies glassily. Hiedurch are also in the rigid cinder insolubly bound these arrears. A plant with a rotary kiln, a subordinate afterburner, a steam boiler and a gas cleanup plant is characterized by that further a gasification reactor with a burner, a coal bed filter and a made bed arranged between burners and coal bed filters is intended, whereby a cinder promotion line from the rotary kiln leads to the made bed of the gasification reactor. The afterburner is connected favourably with the gases leading line developing in the gasification reactor. After a special execution form an arrears promotion line for solids of the gas cleanup plant leads to the burner of the gasification reactor. The invention is in the following described representing design on the basis the operational sequence and the device schematically more near. The special refuse combustion plant represented in the design exhibits a rotary kiln 1, which is bent arranged in promotion direction 2. It is lined with fireproof material 3. Front S tirnwand 4 of the rotary kiln is equipped with entry devices 5 to the Chargieren of the waste 6, as firm and pasty wastes which can be burned. Further a combustion air 8 supplying opening 7 is intended. Ashes and cinder 9 leave the rotary kiln 1 at the opposite side. The rotary kiln 1 is if necessary equipped with a heating mechanism not represented more near, which is at the beginning of the enterprise of the rotary kiln and if necessary also during the enterprise in use. In order to guarantee a complete burn the flue gas 10 developing in the rotary kiln 1, the rotary kiln 1 an afterburner 11 is subordinate. Into this afterburner 11 waste water 12 over a line 13 is introduced. Over further lines 14, 15 and 16 is introduced combustion air of 17, liquid special refuse 18 as well as flue gases 19 from a gasification reactor 20, which is described below. The incineration gases 21 developing in the afterburner 11 are e.g. used in a plant 22, like a steam boiler, energetically and derived over a gas cleanup plant 23 by a fire-place 24. Into the plant a gasification reactor 20 is integrated, as it is descriptive for example in at-B 382,388. It exhibits a vertical pit 25 and a laterally bent section 26, which form a primary gas chamber 27. The vertical pit 25 exhibits itself for the education of two compartments 28, 29 downward a partition 30 extending from the upper end, whose lower edge 31 lies approximately at height of the connection of the bent lower section 26. The lower end of the vertical pit 25 is formed by a diagonal side panel 32, which changes into a horizontal supporting ground 33, whereby the supporting ground 33 is within the lower section 26. Underneath the supporting ground 33 a container 34, in the cooling agent 35 is intended for granulation over overflow resistance 36 planned at the end of the supporting ground in liquid form crossing cinder is filled. Above the overflow weir a burner 37 flows into the primary gas chamber, into which supply 38, 39, 40 for fuels 18, as possibly liquid special refuse, oxygen 41 (or air) and water vapour 42 flow. The compartment 29 more far away lying of the burner 37 is provided at the upper end with a Chargieröffnung for coke 43, which forms a coal bed 44 with a certain height in this compartment. The coke forms a pouring surface 44 for the partition 30 outgoing from the edge 31 '. Into more near the compartment 28 lying to the burner 37 a cinder 9 and ashes of the rotary kiln 1 supplying line 45 flows. This cinder forms a made bed 46 with a pouring surface 47, lying exposed lying between burner 37 and coal bed 44, to the burner 37. The gas arrived over the coal bed 44 - in that it is filtered -, developing with the Ausreagieren of the cinder 9 and melt opens of the cinder 9, into the upper section of the compartment 29 more far away lying of the burner 37 and from there over the gas line 16 into the afterburner 11 one introduces. RK 398,121 B a part that the burner of transmitted liquid special refuse 18 arrives over the branch line 15 into the afterburner 11. From the gas cleanup plant 23 yielding conveyer system 49 leads the solitary solids 48 to the burner 37 of the gasification reactor the function of the plant is as follows: Special refuse 6 (pastily and firmly) in a quantity of 2840 is supplied to the rotary kiln 1 kg/h. Combustion air 8 arrived in a quantity of 22300 Nm3/h into the rotary kiln 1. by the burn of the wastes develops for flue gas 10 in a quantity of 24100 Nm3/h. This flue gas 10 is introduced into the afterburner 11, into also the waste water 12 in a quantity of 2000 kg/h as well as a subset of liquid special refuse 18 in a quantity of 2297 Nm3/h arrives. For the execution of the burn in the afterburner combustion air 17 in a quantity of 6300 Nm3/h is needed. In the rotary kiln 1 cinder 9 in a quantity of 550 develops kg/h with a carbon content of approximately 6%. This cinder 9 into the gasification reactor 20 chargiert, in that it is out-reacted, whereby carbon burns almost completely. By the high temperature developing in the gasification reactor 20 (about 1600 °C) in the cinder 9 existing organic compounds are decomposed and burned. The granulated cinder glassily solidified exhibits a carbon content of 0,1%. It needs to be disposed of on no special refuse dump, but can, since into their contained pollutants inseparably melted, on a conventional dump be disposed of or as building material use be found if necessary. Those the afterburner of 11 supplied liquid special refuse 18 exhibit a heat value of approximately 5500 kcal/kg. Together with the heat value of the flue gas 10, which is with approximately 365 kcal/Nm3, it is possible to increase the temperature in the afterburner 11 on 1200 °C. Also here organic compounds, which originate from the liquid wastes 18, can be decomposed by this high temperature. That the afterburner 11 waste water 12 supplied in a quantity of 2000 kg/h evaporated and the firm waste material particles are burned in the afterburner 11. The Wasseranteil of the waste water 12 causes a loss of temperature, which is compensated however by the heat value of the originating of the exhaust gas 19, which into the afterburner 11 one introduces, from the gasification reactor 20. The plant according to invention is suitable in particular also for the disposal of domestic refuse.