CN2395146Y

CN2395146Y - Rotary kiln-fluidised bed combined solid waste pyrolysis apparatus

Info

Publication number: CN2395146Y
Application number: CN99243273U
Authority: CN
Inventors: 李爱民
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-09-20
Filing date: 1999-09-20
Publication date: 2000-09-06
Anticipated expiration: 2009-09-20

Abstract

The utility model relates to a rotary kiln-fluidised bed combined solid waste pyrolysis apparatus. The main structure is that a horizontal cyclone separator is sealed and sheathed on the periphery of the external heating type rotary kiln; a material recycling mechanism is arranged between the fluidised bed and the separator; a material feeding mixing device is connected between the rotary kiln and the fluidised bed. The product enables the protogenesis solid waste to carry out pyrolysis reactions; generated semi coke recovers heat in a waste heat boiler after hot flue gases generated by the combustion in the fluidised bed heat the solid waste in the rotary kiln, and the dirty discharge is very low. The damage rate of organic pollutants, such as PCBS, PCDD, PCDF, etc. is very high. The removal rate of dioxin can reach 99.9999 percent. The solid waste gets volume reduction to a large extent, and formed small quantity of residues, inertial residues and dust can be served as road-making materials and to recover metal.

Description

Rotary kiln-fluid bed combined type solid pyrolysis of waste device

The utility model relates to a kind of solid waste pyrolysis processing device, particularly a kind of novel rotary kiln-fluid bed combined type solid pyrolysis of waste treating apparatus.

Along with developing rapidly of productivity; population is concentrated to the city; the level of consumption improves constantly; a large amount of industrial solid castoffs and life solid waste increase severely together; the problem that the continuous increase of municipal solid wastes output and the environmental pollution that is brought thereof have become countries in the world and faced jointly; the processing of municipal solid wastes is the important component part of environmental protection, also is a key criteria weighing comprehensive utilization of resources.Though the solid waste incineration technology has obtained using widely in some developed countries, but the secondary pollution emission problem that the waste gas in the solid waste incineration process brings also solves far away fully, and " dioxin " problem that occurs in recent years more makes people's this worry become heavier.

The purpose of this utility model provides a kind of by pyrolytic technique, makes full use of the energy and effectively reduces rotary kiln-fluid bed combined pyrolytic device that secondary pollution is discharged.

For achieving the above object, the technical solution of the utility model is: a kind of rotary kiln-fluid bed combined type solid pyrolysis of waste device is characterized in that the recirculating fluidized bed that it comprises external-heating rotary kiln (2), is made up of external horizontal cyclone separator (3) and fluid bed (6).Horizontal cyclone separator (3) sealing is nested with the periphery of heating revolving kiln (2) outside, its smoke inlet (18) communicates with fluid bed (6) outlet, separator (3) links to each other with fluid bed (6) by separating grey drop pipe (17) and returning charge mechanism (12), rotary kiln (2) links to each other with fluid bed (6) by semicoke drop pipe (8), entry mixers (9), auxiliary fuel adds pipe (7) and links to each other with entry mixers (9), or directly link to each other with fluid bed (6), rotary kiln (2) is provided with pyrolysis gas outlet (5).

The utility model is owing to adopt said structure, make the pyrolysis in rotary kiln of undressed primary solid waste, with the isolated fully situation of oxygen under by the pyrolysis of hot flue gas indirect, the hot flue gas that pyrolytic reaction makes the semicoke of generation produce in the recirculating fluidized bed internal combustion, remove waste heat boiler after the solid waste in the heating rotary kiln, the pyrolysis gas calorific value that this system produces is higher, can directly transport his usefulness in waste heat boiler internal combustion or storage.The major advantage of this system is that disposal of pollutants is very low, and particularly the destructive rate of organic pollutions such as PCBs, PCDD, PCDF is high.Compare with the incineration technology of routine, substantially do not contain organic pollution matter in the flue gas, the clearance of " dioxin " can reach 99.9999%, level of residue seldom, solid waste has obtained subtracting significantly appearance, the dust that inert residues do that forms and burning back form can be used as road-making material, also can therefrom reclaim metal, reduces environmental pollution further.

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is the structural representation of the utility model cyclone separator.

Below in conjunction with accompanying drawing the specific embodiment of the present utility model is described further:

A kind of rotary kiln-fluid bed combined type solid pyrolysis of waste device, the recirculating fluidized bed that it comprises external-heating rotary kiln 2, is made up of external horizontal cyclone separator 3 and fluid bed 6.Horizontal cyclone separator 3 sealings are nested with the periphery of heating revolving kiln 2 outside, its smoke inlet 18 communicates with fluid bed 6 outlets, separator 3 links to each other with fluid bed 6 by separating grey drop pipe 17 and returning charge mechanism 12, rotary kiln 2 links to each other with fluid bed 6 by semicoke drop pipe 8, entry mixers 9, auxiliary fuel adds pipe 7 and links to each other with entry mixers 9, or directly link to each other with fluid bed 6, rotary kiln 2 is provided with pyrolysis gas outlet 5; Horizontal cyclone separator 3 comprises cylindrical shell 13, helical baffle 14, front apron 15, backboard 16, separates grey drop pipe 17; Helical baffle 14 is arranged on the inside of cylindrical shell 13, front apron 15 and backboard 16 are located at the rear and front end of cylindrical shell 13, separate grey drop pipe 17 and be located at the bottom of cylindrical shell 13 and communicate with cylindrical shell, exhanst gas outlet 4 and smoke inlet 18 are arranged tangential with cylindrical shell 13, are arranged on the two ends of cylindrical shell 13.

Undressed primary solid waste enters in the rotary kiln 2 by the solid waste import 1 of external-heating rotary kiln 2, with the isolated fully situation of oxygen under, pyrolysis in rotary kiln, combustion gas after the pyrolysis expels from kiln by pyrolysis gas outlet 5, be used to heat waste heat boiler and its usefulness, semicoke that pyrolytic reaction produced and auxiliary fuel coal (adding by auxiliary fuel charge pipe 7 in case of necessity) are in the recirculating fluidized bed internal combustion, the hot flue gas that burning produces separates flying dust in horizontal cyclone separator 3, but the while is heating rotary kiln 2 again, hot flue gas is discharged from the exhanst gas outlet 4 of separator subsequently, be used to heat waste heat boiler and produce steam or hot water, be used for generating or heat supply; The hot flue gas that fluid bed 6 burnings produce enters cyclone separator 3 by the inlet 18 of cyclone separator 3, flue gas flows along helical baffle 4 in cyclone separator flying dust is separated from hot flue gas, flying dust is by separating grey drop pipe 17, returning charge mechanism 12 returns fluid bed 6, semicoke after the solid waste pyrolysis in the rotary kiln 2 is by semicoke drop pipe 8, entry mixers 9 enters fluid bed 6, afterburnt in fluid bed 6, discharge by the scum pipe that is arranged on the air distribution plate 10 in the fluid bed 6, flying dust in the fluid bed 6 can pass through separator 3, returning charge mechanism 12 does further circulation, is provided with bellows 11 in the fluid bed bottom.

Claims

1, a kind of rotary kiln-fluid bed combined type solid pyrolysis of waste device, it is characterized in that it comprises external-heating rotary kiln, the recirculating fluidized bed of forming by external horizontal cyclone separator (3) and fluid bed (6), horizontal cyclone separator (3) sealing is nested with the periphery of heating revolving kiln (2) outside, its smoke inlet (18) communicates with fluid bed (6) outlet, separator (3) links to each other with fluid bed (6) by separating grey drop pipe (17) and returning charge mechanism (12), rotary kiln (2) is by semicoke drop pipe (8), entry mixers (9) links to each other with fluid bed (6), auxiliary fuel adds pipe (7) and links to each other with entry mixers (9), or directly link to each other with fluid bed (6), rotary kiln (2) is provided with pyrolysis gas outlet (5).

2, rotary kiln according to claim 1-fluid bed combined type solid pyrolysis of waste device is characterized in that described horizontal cyclone separator (3) comprises cylindrical shell (13), helical baffle (14), front apron (15), backboard (16), separates grey drop pipe (17); Helical baffle (14) is arranged on the inside of cylindrical shell (13), front apron (15) and backboard (16) are located at the rear and front end of cylindrical shell (13), separating grey drop pipe (17) is located at the bottom of cylindrical shell (13) and communicates with cylindrical shell, exhanst gas outlet (4) and smoke inlet (18) are arranged tangential with cylindrical shell (13), are arranged on the two ends of cylindrical shell (13).