Patent DE-102007056903-A1 (DE)
Title: The plant for thermal treatment of waste materials, has a reactor in which the waste material flows throughable and temperature is adjustable for drying and pyrolysis of the waste material, and separator arranged downstream to the reactor
Inventor: MORSCHETT PETER
IPC: C02F11/13
Filed: 2007-11-22
Abstract: The plant for thermal treatment of waste materials, comprises a reactor (1), in which the waste material flows throughable and temperature is adjustable for drying and pyrolysis of the waste material, and a separator in which fine-grained particles like ash and dust of coarse grained particles are separated. The separator is arranged downstream of the reactor. The separator is formed in the form of a discharge screw conveyor that is arranged in a sieve like perforated screw mantle tube at its under side and is assigned a waste container for the sifted fine grained particles. The plant for thermal treatment of waste materials, comprises a reactor (1), in which the waste material flows throughable and temperature is adjustable for drying and pyrolysis of the waste material, and a separator in which fine-grained particles like ash and dust of coarse grained particles are separated. The separator is arranged downstream of the reactor. The separator is formed in the form of a discharge screw conveyor that is arranged in a sieve like perforated screw mantle tube at its under side, and is assigned a waste container for the sifted fine grained particles. The coarse-grained metal depositions from the other pyrolytic components of the composite material are separated in the discharge screw conveyor from pyrolysed initial substances in the form of metal containing composite material. The reactor is arranged with a housing, in which a screw is arranged, an inlet for the waste material as initial substance (SA), an outlet for the thermally treated final substance (SE), a heating unit (2) for heating the reactor and with a suction for the suction of separated gases and vapors during the thermal treatment of the waste material. The reactor and/or the housing is extensively and/or completely sealed against the environment. The inlet in the housing and/or the outlet from the housing are formed in the form of a cellular wheel sluice guaranteeing the sealing for the surrounding atmosphere. The area of the screw subsequent itself at the inlet has a riser (a), in which the initial substances are condensed so that a sealing is guaranteed for the surrounding atmosphere. The area of the screw present itself before the outlet has a raiser (c), in which the final substances are condensed so that the sealing is guaranteed for the surrounding atmosphere. The heating unit has a combustor (5) for thermal combustion of gas/vapor or of rest gases formed from the gas/vapor. The first part (T1) of the gas/vapor or rest gas is supplyable to the combustor and the heating unit and the second part (T2) of the gas/vapor or the rest gas is supplyable to an energy supply unit. The volume of the treated substances is reduced up to 90% in relation to the volume of the initial substances. A condensator (4) is arranged downstream to an oil precipitator (7). A recooling plant is arranged between the condensator and the oil precipitator for generating a cooling circuit. In the reactor, a temperature guaranteeing the low temperature pyrolysis of the initial substances is adjustable at up to 500[deg] C, a temperature guaranteeing the middle temperature pyrolysis is adjusted at 500-800[deg] C, and a temperature guaranteeing the high temperature pyrolysis is adjusted at 800[deg] C. The temperature in the reactor is 250-800[deg] C. The final substances are deposited or recirculatable into economic cycle. The briquetting non-metallic final substances are usable as fuel. The initial substances are used in the form of minerals e.g. sand and stone, miscellaneous waste from the mechanical treatment of waste and from the shredders of metal containing waste like tetra packs, spit materials, cellulose sludge, deinking sludge, oil containing waste, sludge having dangerous material from the treatment of waste water in industries, biological treatment of industrial waste water, physical and chemical treatment and from sewer cleaning, sludge or emulsions from desalination, residues from scrap processing, waste with organic plant protection agent, wood protection agent and other biocides, waste from sand trap plant and oil-water precipitators, sanitation of base and ground water, mechanical chipping and/or physical and from mechanical surface treatment of metal and plastic, track skeleton, sand of the turbulence layer that occurs in the combustion or pyrolysis of waste, waste from oil processing, medical and hospital wastes, shredder waste from vehicle core of the scrap car application, production wastes, DSD (Duales System Deutschland) sorting residue, faeces from animal husbandry, and/or substances from the animal body disposal. The final substances are ash with metal deposition in the use of initial substances in the form of spit material, shredder waste and/or DSD sorting residue. The final substance serving as fuel and/or the combustion gas is used for the operation of the plant. The housing has a height that is larger over the total length of the screw or area wisely larger than the diameter of the screw present itself in the housing, which rejuvenates itself in the cross-section towards the top. Units existing out of housing and the screw are arranged in the reactor next to one another and/or above one another. The reactors are coupled to each other. The housing and the screw have a bias that extends in direction to discharge opening.