CN2503361Y

CN2503361Y - Rotary furnace bed garbage gasification incineration device

Info

Publication number: CN2503361Y
Application number: CN 01253600
Authority: CN
Inventors: 宋纪元
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-09-12
Filing date: 2001-09-12
Publication date: 2002-07-31
Anticipated expiration: 2011-09-12

Abstract

The utility model relates to a rotary furnace bed garbage gasification incineration device which comprises a rotary kiln, a grate, a secondary combustion chamber and a waste heat boiler, wherein the waste heat boiler comprises a radiation hearth, a cold smoke chamber, a convection chamber and a tail flue, and integrates with the secondary combustion chamber. The garbage is pyrolyzed and gasified in the rotary kiln under the condition of the lack of oxygen, the waste residue is completely burned out on the grate of the lower part of the secondary combustion chamber, and the gasification products are further burned in the secondary combustion chamber. The flue gas of the combustion products upwards flow into the radiation hearth from the secondary combustion chamber, and the combustion time of the flue gas in the secondary combustion chamber and the radiation hearth of the waste heat boiler is over 2 seconds in order to ensure that toxic and harmful substances are completely decomposed. The secondary combustion chamber and the waste heat boiler are made into a whole, which has the compact structure and can fully utilize the waste heat of exhaust gas to generate steam. Adopting the technology of the pyrolysis and gasification under the condition of the lack of oxygen and the secondary combustion, the utility model greatly improves the capacity of the rotary kiln disposing of waste, uses the secondary combustion chamber to ensure the complete combustion of gasification products and residues, and thereby overcomes the defects of the traditional rotary kiln garbage incineration device of and enlarges the adaptability of the waste.

Description

Revolution siege refuse gasification incinerator

(1) technical field

The utility model relates to a kind of garbage combustion device, relates in particular to a kind of incinerator that uses the revolution siege to make refuse gasification.

(2) background technology

The device of the garbage burning processing method that adopts both at home and abroad has at present: fixed bed, grate furnace, rotary kiln, fluid bed etc. are multiple.Fixed bed seldom uses at present because incineration firing is insufficient, garbage treatment quantity is little.Grate furnace has various ways such as backstepping reciprocal grate, forwards reciprocal grate, rolling fire grate.These grate furnaces, garbage treatment quantity are big, rubbish easy fire burns, at home and abroad the application of urban garbage disposal aspect is more extensive; But adopt grate furnace that rubbish is directly burnt, air demand is big, heat loss is more, and when the lower or refuse thermal value fluctuation of refuse thermal value was big, the combustion product carbon containing was more, and it is insufficient burn, a large amount of NOx of generation when refuse thermal value is higher.Rotary kiln is mainly used in the burning of industrial refuse, general scale is less, adopts oil spout combustion-supporting, and residue is discharged with liquid state or molten form, higher sealing and the high temperature deformation problem that has rotatable parts of kiln temperature, liquid state or molten residue satisfy the need to serve as a contrast and corrode severity in addition.Fluidized bed refuse incinerator is applicable to that large scale rubbish handles, and rubbish advances preliminary treatment such as will carrying out fragmentation before the stove burning disposal, causes like this that equipment manufacturing cost is higher, operating cost increases.

(3) summary of the invention

The purpose of this utility model provides a kind of larger gasification burning device that can handle various ways discarded objects such as house refuse, industrial refuse, medical waste.This device can overcome the shortcoming of traditional rotary kiln garbage combustion device, makes sufficient combustion.

For reaching above-mentioned purpose, revolution siege refuse gasification incinerator of the present utility model adopts to be formed as lower member: garbage feeding doffer, rotary kiln, waste heat boiler is characterized in that it also is included in the dual firing chamber and the fire grate bottom dual firing chamber of rotary kiln outlet; Wind of fire grate inlet is set below fire grate, infeeds amount of oxygen and be 0.3～0.5 times of theoretical air consumption; Arrange overfire air jet at dual firing chamber's front-back wall.

After adopting such structure,, make fully after-flame of gasification product and residue through the oxygen debt pyrolytic gasification of rotary kiln and the secondary after-flame technology of dual firing chamber and fire grate.

For further specifying above-mentioned purpose of the present utility model, design feature and effect,, the utility model is described in detail below with reference to accompanying drawing.

(4) description of drawings

Fig. 1 is the principle schematic according to the revolution siege refuse gasification incinerator of the utility model specific embodiment.

(5) specific embodiment

Revolution siege refuse gasification incinerator as shown in Figure 1, garbage feeding device 1 links to each other through the head of doffer 2 with rotary kiln 3, and rotary kiln 3 is adiabatic kiln wall, and inwall 4 is refractory lining and heat-insulation layer, outer wall 5 is a steel tube structure, and the gradient of rotary kiln 3 is 3～5%.Kiln hood is arranged kiln hood seal closure 6, is provided with wind inlet 7 of kiln hood between kiln hood seal closure 6 and the doffer 2.Rotary kiln 3 outlets link to each other with dual firing chamber 11.Kiln tail seal closure 8 is arranged between rotary kiln 3 and dual firing chamber's 11 antethecas.Be fire grate 9 below the kiln tail, fire grate 9 bottom air compartments are wind inlet 10 of fire grate.The dual firing chamber 11 that fire grate 9 tops link to each other for 3 outlets with rotary kiln.The front-back wall of dual firing chamber 11 is furnished with overfire air jet 12.Dual firing chamber 11 is made of one with waste heat boiler 19, and wherein waste heat boiler 19 comprises radiant box will 15, cold smoke chamber 16, convection cell 17 and back-end ductwork 18.Dual firing chamber 11 tops promptly are arranged as radiant box will 15, more successively through cold smoke chamber 16, convection cell 17, enter back-end ductwork 18 at last.To further specify its operation principle below.

Rubbish in the rubbish hopper enters the head of rotary kiln 3 through doffer 2 by garbage feeding device 1, the filling rate of discarded object in kiln is 15～30%, and stopped 45～60 minutes, experience preheating, drying, pyrolysis and burning four-stage, residue flows out from rotary kiln 3 afterbodys.Because from wind of kiln hood inlet 7 air that infeed are 0.5～0.7 times of the required theoretical air consumption of castoff burning, make the waste gasification product can not completing combustion and in rotary kiln 3 oxygen debt pyrolytic gasification, the vapour that thereupon enters dual firing chamber 11 is mainly by CO, H ₂, CH ₄, CO ₂Deng composition, contain a large amount of fixed carbon in the residue.The infinite variable speed narrow fire grate of fire grate 9 general employings below the kiln tail, infeed 0.3～0.5 times the required theoretical air consumption of castoff burning from wind of fire grate inlet 10, guarantee the fixed carbon abundant after-flame before entering slag notch 10 in the residue, the abundant afterburnt of the fixed carbon in the residue falls into Martin's formula mucking machine 14.Fire grate 9 tops are dual firing chamber 11, secondary wind sprays into from the overfire air jet 12 that is arranged in front-back wall, from gasification product and the mixed combustion above fire grate 9 of secondary wind that rotary kiln 3 flows into, forming the flame kernel temperature is between 1200～1350 ℃, guarantees gasification product fully burning in dual firing chamber 11.The combustion product flue gas upwards flows into radiant box will 15 from dual firing chamber 11, and flue gas stops more than 2 seconds in dual firing chamber 11 and radiant box will 15, guarantees that the poisonous and harmful substance of pyrolysis of waste generation is decomposed fully, enters cold smoke chamber 16 then, and flue gas is further cooled off.The flue gas oxygen content that comes out from radiant box will 15 is controlled between 8～12%.Flue gas enters convection cell 17 to produce and to reach the steam of instructions for use after 15 inside turns of cold smoke chamber, enter back-end ductwork 18 at last.Because dual firing chamber 11 is made of one with waste heat boiler 19, compact conformation just can make full use of waste gas residual heat and produce steam, effective recycling the energy.

Certainly, those of ordinary skill in the art will be appreciated that, above embodiment only is used for illustrating, and can not be as to qualification of the present utility model, as long as in connotation scope of the present utility model, all will drop in the scope of the utility model claims variation, the modification of the above embodiment.

Claims

1. a revolution siege refuse gasification incinerator comprises garbage feeding doffer, rotary kiln, waste heat boiler, it is characterized in that it also is included in the dual firing chamber and the fire grate bottom dual firing chamber of rotary kiln outlet; Wind of fire grate inlet is set below fire grate, infeeds amount of oxygen and be 0.3～0.5 times of theoretical air consumption; Arrange overfire air jet at dual firing chamber's front-back wall.

2. revolution siege refuse gasification incinerator as claimed in claim 1 is characterized in that described rotary kiln is a heat insulation-type, and skin is a steel plate structure, and internal layer is a fireclay insulating refractory; The gradient of rotary kiln is 3～5%.

3. revolution siege refuse gasification incinerator as claimed in claim 1 is characterized in that described fire grate is infinite variable speed narrow fire grate.

4. revolution siege refuse gasification incinerator as claimed in claim 1 is characterized in that described waste heat boiler comprises radiant box will, cold smoke chamber, convection cell and the back-end ductwork that interconnects, and integrated with dual firing chamber.

5. as claim 1 and 4 described revolution siege refuse gasification incinerators, it is characterized in that described dual firing chamber and radiant box will lay refractory material or spray into combustion-supporting fuel; Described radiant box will outlet oxygen content is in 8～12%.