CN110883050A - Rapid recycling and cleaning treatment method and system for high-water-content household garbage - Google Patents
Rapid recycling and cleaning treatment method and system for high-water-content household garbage Download PDFInfo
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- CN110883050A CN110883050A CN201911104774.8A CN201911104774A CN110883050A CN 110883050 A CN110883050 A CN 110883050A CN 201911104774 A CN201911104774 A CN 201911104774A CN 110883050 A CN110883050 A CN 110883050A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/05—Preparation or purification of carbon not covered by groups C01B32/15, C01B32/20, C01B32/25, C01B32/30
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/02—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
- F23G5/033—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment comminuting or crushing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/02—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
- F23G5/04—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment drying
Abstract
The invention discloses a quick recycling and cleaning treatment method and a quick recycling and cleaning treatment system for high-water-content household garbage, which comprise the following steps of: (1) crushing: crushing the garbage raw material containing 50-80% of water until the particle size is less than 50 mm; (2) and (3) drying: contacting the crushed garbage with hot air for 15-60 min; (3) pyrolysis: after drying, the garbage at the temperature of 80-105 ℃ is contacted with high-temperature flue gas for 15-60min, and the garbage is heated to the temperature of 300-600 ℃ for pyrolysis; (4) purifying: after high-temperature dust removal and desulfurization are carried out on 150-DEG C pyrolysis gas at 300 ℃, carbon residue particles and fuel gas are obtained; (5) low-nitrogen combustion: burning the 120-200 ℃ hot and humid air generated in the step (2) and the 150-300 ℃ fuel gas, adjusting the temperature of the obtained high-temperature flue gas to 600-800 ℃, and sending the high-temperature flue gas into the step (3); (6) heat exchange: the cold air and the 300-400 ℃ middle temperature flue gas generated in the step (3) carry out indirect heat exchange, the obtained 200-300 ℃ air is sent to the step (2), and the 120-160 ℃ flue gas is discharged; (7) crushing: and (4) mixing and crushing the residual carbon and the residual carbon particles obtained in the step (3). The invention has the characteristics of compact process, high integration degree, small system floor area, flexible installation mode, on-site conversion, no odor emission and no secondary pollution.
Description
Technical Field
The invention belongs to the technical field of kitchen waste treatment, and particularly relates to a quick recycling and cleaning treatment method and system for high-water-content household garbage.
Background
The kitchen waste is one of the important components of the household waste, the cleaning and transporting amount of the household waste in China in 2017 reaches 2.16 hundred million tons, and 59.3 percent of the household waste is the kitchen waste. The kitchen waste contains 50-80% of water and a large amount of organic matters, so that the kitchen waste is easy to rot and deteriorate under the action of microorganisms; and the longer the waste is placed, the more serious the putrefaction phenomenon becomes. The generated percolating water and foul gas breed mosquitoes, which causes bad influence on environmental sanitation. In addition, leachate generated during the stacking of kitchen waste enters a sewage treatment system, and the content of organic matters is increased, so that the burden of a sewage treatment plant is increased, and the operation cost is increased. Therefore, a process method capable of cleaning and converting kitchen waste on site is urgently needed to be developed.
The existing treatment methods of kitchen waste are mainly divided into three categories: harmless treatment, resource utilization and energy regeneration.
The harmless method mainly comprises crushing direct discharge and landfill, wherein the crushing direct discharge is easy to cause most insoluble fine particles to deposit in a pipeline, high grease is easy to block, anaerobic reaction is generated, methane and hydrogen sulfide are generated, the safety risk of the pipeline is increased, and the domestic sewage treatment burden is increased; the land occupation of the landfill is large, the leachate pollutes the underground water, and organic matters are decayed to form secondary pollution.
The recycling method mainly uses compost and feed, the compost conversion cycle time is long, the waste consumption is low, impurities in the waste, such as plastics, fabrics, bones, metals and the like, cannot be decomposed, and the quality of the fertilizer is poor; the kitchen waste is used as feed, and after livestock directly eat the kitchen waste which is not effectively treated, homologous pollution of cannibalism easily occurs, cross infection of epidemic diseases between people and livestock is caused, human health is harmed, and the spread of certain fatal diseases can be promoted.
The energy method mainly uses incineration power generation, the investment is large, toxic substances such as dioxin exist in combustion tail gas, in addition, the heat value of kitchen waste is low, and the combustion effect can be ensured only by additionally consuming energy.
Aiming at the three kitchen waste treatment methods, a method which has high integration degree, high kitchen waste treatment speed, low investment and no secondary pollution is very necessary to be developed.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a quick resource clean treatment method and a quick resource clean treatment system for high-water-content household garbage.
The technical scheme of the invention is summarized as follows:
a high-water-content household garbage rapid recycling cleaning treatment method utilizes the self-heat value of garbage to perform anaerobic pyrolysis on the garbage to finally obtain carbon powder, and comprises the following specific steps:
(1) crushing: crushing the garbage raw material containing 50-80% of water by a crusher until the particle size is less than 50 mm;
(2) and (3) drying: the crushed garbage is contacted with hot air at 300 ℃ of 200-;
(3) pyrolysis: contacting the garbage at the temperature of 80-105 ℃ with the high-temperature flue gas at the temperature of 600-800 ℃, keeping the residence time for 15-60min, heating the garbage to the temperature of 300-600 ℃ to carry out pyrolysis, sending the generated pyrolysis gas at the temperature of 300-300 ℃ to the purification step (4), sending the residual carbon after pyrolysis to the crushing step (7), converting the high-temperature flue gas into the medium-temperature flue gas at the temperature of 300-400 ℃, and sending the medium-temperature flue gas to the heat exchange step (6);
(4) purifying: after high-temperature dust removal and desulfurization are carried out on 150-300 ℃ pyrolysis gas, carbon residue particles are obtained and sent to the crushing step (7), and the obtained fuel gas is sent to the low-nitrogen combustion step (5);
(5) low-nitrogen combustion: carrying out low-nitrogen combustion on 120-200 ℃ hot humid air and 150-300 ℃ fuel gas, adjusting the temperature of the high-temperature flue gas after combustion to 600-800 ℃, and sending the high-temperature flue gas into the pyrolysis step (3);
(6) heat exchange: indirectly exchanging heat between the cold air and the pyrolyzed 300-400 ℃ medium-temperature flue gas, heating the air to 200-300 ℃, sending the air to the drying step (2), cooling the flue gas to 120-160 ℃, and discharging;
(7) crushing: and (4) mixing the residual carbon obtained in the pyrolysis step (3) and the residual carbon particles obtained in the purification step (4), and crushing to obtain carbon powder with the particle size of 0.2-1 mm.
Preferably, the waste material is kitchen waste or a mixture of kitchen waste and other waste in a waste classification (recoverable waste, kitchen waste, hazardous waste and other waste).
Preferably, in the heat exchange step (6), the cold air is normal temperature air, and is used as a deodorizing gas of the whole treatment method system.
Preferably, NO in the discharged flue gas in the heat exchange step (6)xThe content is less than or equal to 50mg/Nm3、SOxThe content is less than or equal to 35mg/Nm3CO content less than or equal to 20mg/Nm3The content of dioxin is less than or equal to 0.02ngTEQ/Nm3。
Preferably, in the crushing step (7), the calorific value of the carbon powder is 1500-.
The invention also provides a high-water-content household garbage rapid recycling cleaning treatment system which comprises a crushing device (1), a drying device (2), a pyrolysis device (3), a purification device (4), a combustion device (5), a heat exchange device (6) and a crushing device (7), wherein the crushing device (1), the drying device (2), the pyrolysis device (3) and the crushing device (7) are communicated in sequence and used for crushing, drying and pyrolyzing garbage raw materials, and residual carbon generated by treatment of the pyrolysis device (3) enters the crushing device (7);
the purification device (4) is respectively communicated with the pyrolysis device (3), the crushing device (7) and the combustion device (5), pyrolysis gas generated by treatment of the pyrolysis device (3) enters the purification device (4) to be subjected to high-temperature dust removal and desulfurization treatment to obtain carbon residue particles and fuel gas, the carbon residue particles enter the crushing device (7) to be mixed and crushed with carbon residue to obtain carbon powder, and the fuel gas enters the combustion device (5);
the combustion device (5) is also respectively communicated with the drying device (2) and the pyrolysis device (3), hot and humid air discharged by the drying device (2) enters the combustion device (5) to be mixed and combusted with fuel gas, and generated high-temperature flue gas enters the pyrolysis device (3) and is converted into medium-temperature flue gas after heat supply;
heat transfer device (6) communicate with drying device (2), pyrolysis device (3) respectively, and pyrolysis device (3) exhaust medium temperature flue gas gets into heat transfer device (6), takes place heat exchange with the cold air among heat transfer device (6), and the hot-air that produces gets into drying device (2), discharges clean flue gas.
Preferably, a communication pipeline between the drying device (2) and the combustion device (5) is provided with an electric heating device (8), when the system is started for the first time, the air is heated in an electric heating mode, heat is further provided for the pyrolysis device (3), and after the system is stably operated, the electric heating device (8) is closed.
The invention has the beneficial effects that:
1. the invention has the characteristics of compact process, high integration degree, small system occupied area, flexible installation mode, on-site conversion, no odor emission and no secondary pollution, and the produced carbon powder has higher heat value and can be used for combustion of a furnace kiln.
2. The invention utilizes the self calorific value of the garbage to carry out rapid drying and anaerobic pyrolysis on the domestic garbage, the pyrolysis gas has no pollutant, the ultralow nitrogen combustion technology is adopted, the pyrolysis gas is subjected to adiabatic combustion, the temperature is high, the content of nitrogen oxides, dioxin and other pollutants in the generated flue gas is far lower than the national standard, and the emission requirement is met.
3. The method can treat various kinds of garbage, and intractable garbage which is difficult to treat also has good treatment effect, such as wood blocks, packaging bags and the like; the resource conversion of the kitchen waste is realized within 24h, and no secondary pollution is caused in the treatment process; the treatment mode is flexible, and the treatment can be centralized or local; the method conforms to the principle of 'reduction, harmlessness and recycling' on-site treatment of national garbage treatment.
Drawings
FIG. 1 is a flow chart of the rapid recycling and cleaning treatment method of high-water-content household garbage.
FIG. 2 is a schematic view of the structure of the rapid recycling and cleaning treatment of the high-water-content domestic garbage.
Detailed Description
The present invention is further described in detail below with reference to examples so that those skilled in the art can practice the invention with reference to the description.
The invention relates to a process method for rapid recycling and cleaning treatment of high-water-content household garbage, which comprises the following steps: crushing the garbage raw material (with the water content of 50-80%), performing contact heat exchange drying on the crushed garbage and hot air (200-; the dried garbage is contacted with high-temperature flue gas for pyrolysis (at 600 ℃ C.) at 300 ℃ C. for 15-60min, and the high-temperature flue gas (at 800 ℃ C.) is converted into medium-temperature flue gas (at 400 ℃ C.) after heat supply; the pyrolysis gas is subjected to high-temperature dust removal and desulfurization in sequence, then is mixed with hot humid air and then is subjected to low-nitrogen combustion, and the residual carbon particles are mixed and then are crushed to obtain carbon powder; the medium temperature flue gas (300-400 ℃) and the cold air (normal temperature 20 ℃) are subjected to heat exchange and then reduced to 120-160 ℃, and then are discharged, and the cold air is heated to 200-300 ℃ and then is subjected to drying treatment with the crushed garbage.
Example 1
Crushing 1 ton of kitchen garbage containing 60% of water until the particle size of the garbage is smaller than 50mm, sending the garbage into drying equipment, mixing the garbage with hot air at 300 ℃, performing contact heat exchange drying, staying for 30min, heating the garbage to 100 ℃, reducing the moisture of the garbage to 30%, and converting the hot air into hot and humid air at 150 ℃; contacting the dried garbage with high-temperature flue gas at 750 ℃, heating the garbage to 550 ℃, performing pyrolysis, staying for 40min to generate residual carbon and pyrolysis gas at 250 ℃, and converting the high-temperature flue gas into medium-temperature flue gas at 320 ℃ after heat supply; sequentially carrying out high-temperature dust removal and desulfurization on the 250 ℃ pyrolysis gas to obtain carbon residue particles and fuel gas, then mixing the fuel gas with hot humid air, then carrying out adiabatic low-nitrogen combustion, mixing the carbon residue, and crushing to obtain 110kg of carbon powder; and (3) reducing the temperature of the 320 ℃ medium-temperature flue gas to 120 ℃ after heat exchange with cold air, then discharging, and drying the crushed garbage with the cold air after the temperature of the cold air is raised to 260 ℃.
Example 2
Mixing 0.5 ton of kitchen garbage containing 70% of water and 0.5 ton of waste paper garbage containing 10% of water, crushing, sending into a drying device after crushing, mixing with hot air at 250 ℃, performing contact heat exchange drying, staying for 30min, heating the garbage to 90 ℃, reducing the water content to 20%, and converting the hot air into hot and humid air at 150 ℃; contacting the dried garbage with high-temperature flue gas at 750 ℃, heating the garbage to 500 ℃, performing pyrolysis to generate residual carbon and pyrolysis gas at 200 ℃, staying for 30min, and converting the high-temperature flue gas into medium-temperature flue gas at 340 ℃ after heat supply; sequentially carrying out high-temperature dust removal and desulfurization on pyrolysis gas at 200 ℃ to obtain carbon residue particles and fuel gas, then mixing the fuel gas with hot humid air, then carrying out adiabatic low-nitrogen combustion, and crushing the carbon residue to obtain 130kg of carbon powder; and (3) reducing the temperature of the 340 ℃ medium-temperature flue gas to 130 ℃ after heat exchange with cold air, then discharging, and drying the crushed garbage with the cold air after the temperature of the cold air is raised to 250 ℃.
Example 3
Mixing 0.3 ton of kitchen garbage containing 70% of water and 0.7 ton of waste paper garbage containing 10% of water, crushing, sending into a drying device after crushing, mixing with hot air at 200 ℃, performing contact heat exchange drying, staying for 25min, heating the garbage to 80 ℃, reducing the water content to 10%, and converting the hot air into hot and humid air at 170 ℃; contacting the dried garbage with high-temperature flue gas at 700 ℃, heating the garbage to 450 ℃, performing pyrolysis to generate residual carbon and pyrolysis gas at 180 ℃, staying for 20min, and converting the high-temperature flue gas into medium-temperature flue gas at 350 ℃ after heat supply; high-temperature dust removal and desulfurization are sequentially carried out on pyrolysis gas at 180 ℃ to obtain carbon residue particles and fuel gas, then the fuel gas and hot humid air are mixed and then are subjected to adiabatic low-nitrogen combustion, and the carbon residue is crushed to obtain 180kg of carbon powder; and (3) reducing the temperature of the 350 ℃ medium-temperature flue gas to 150 ℃ after heat exchange with cold air, then discharging, and drying the crushed garbage with the cold air after the temperature of the cold air is raised to 270 ℃.
The indexes of each pollutant in the clean flue gas finally discharged in the examples 1-3 are shown in the following table 1:
table 1:
| contaminants | GB18485-2014 | Example 1 | Example 2 | Example 3 |
| soot/mg/Nm3 | 20 | 9.6 | 10.4 | 12.1 |
| NOx/mg/Nm3 | 250 | 42.6 | 41.8 | 48.5 |
| SOx/mg/Nm3 | 80 | 27.4 | 29.1 | 31.7 |
| CO/mg/Nm3 | 80 | 9.6 | 14.5 | 16.2 |
| dioxin/ngTEQ/Nm3 | 0.1 | 0 | 0.01 | 0.02 |
As can be seen from Table 1, the contents of nitrogen oxides, dioxins and other pollutants in the flue gas discharged in examples 1 to 3 are far lower than the national standard, and the flue gas meets the emission requirements.
The performance indexes of the carbon powders produced in examples 1-3 are shown in Table 2:
table 2:
| carbon powder performance index | Example 1 | Practice ofExample 2 | Example 3 |
| Total yield/kg | 110 | 130 | 180 |
| Yield/%) | 11 | 13 | 18 |
| Average particle diameter/mm | 0.6 | 0.8 | 0.3 |
| Calorific value/Kcal/kg | 1685 | 3402 | 4829 |
As can be seen from Table 2, the carbon powders produced in examples 1-3 have a high calorific value and can be used for combustion in furnaces and kilns.
Referring to fig. 2, the invention further provides a high-water-content domestic garbage rapid recycling cleaning treatment system, which comprises a crushing device 1, a drying device 2, a pyrolysis device 3, a purification device 4, a combustion device 5, a heat exchange device 6 and a crushing device 7.
Wherein, the crushing device 1, the drying device 2, the pyrolysis device 3 and the crushing device 7 are communicated in sequence; the method comprises the steps that garbage raw materials containing 50-80% of water enter a crushing device 1, are crushed until the particle size is smaller than 50mm, enter a drying device 2, and are contacted with hot air at 300 ℃ plus 250 ℃., the retention time is set to be 15-60min, when the temperature of the garbage rises to 80-105 ℃, the moisture is reduced to 25-40%, enter a pyrolysis device 3, the garbage at 80-105 ℃ is contacted with high-temperature flue gas at 800 ℃ plus 600 ℃, the retention time is set to be 15-60min, the garbage is heated to 600 ℃ plus 300 ℃ to be pyrolyzed, and residual carbon generated by pyrolysis enters a crushing device 7;
the purification device 4 is respectively communicated with the pyrolysis device 3, the crushing device 7 and the combustion device 5, the pyrolysis gas at 300 ℃ generated by the treatment of the pyrolysis device 3 enters the purification device 4 to be subjected to high-temperature dust removal and desulfurization treatment to obtain carbon residue particles and fuel gas, the carbon residue particles enter the crushing device 7 to be mixed and crushed with the carbon residue to obtain carbon powder with the particle size of 0.2-1mm, and the fuel gas at 300 ℃ of 150 ℃ enters the combustion device 5;
the combustion device 5 is also respectively communicated with the drying device 2 and the pyrolysis device 3, hot and humid air at 200 ℃ discharged by the drying device 2 enters the combustion device 5 and is mixed with fuel gas at 300 ℃ with 150-; an electric heating device 8 (not shown in figure 2) is arranged in a communication pipeline between the drying device 2 and the combustion device 5, when the system is started for the first time, air is heated in an electric heating mode, heat is further provided for the pyrolysis device 3, and after the system runs stably, the electric heating device is closed;
the heat exchange device 6 is respectively communicated with the drying device 2 and the pyrolysis device 3, the 300-plus-400 ℃ medium temperature flue gas discharged by the pyrolysis device 3 enters the heat exchange device 6 to be subjected to heat exchange with cold air (20 ℃ normal temperature air) in the heat exchange device 6, the generated hot air enters the drying device 2, clean flue gas is discharged, and the content of nitrogen oxides, dioxin and other pollutants in the discharged clean flue gas is far lower than the national standard. The cold air is normal temperature air and is used as deodorization gas of the whole set of treatment system.
While embodiments of the invention have been disclosed above, it is not limited to the applications listed in the description and the embodiments, which are fully applicable in all kinds of fields of application of the invention, and further modifications may readily be effected by those skilled in the art, so that the invention is not limited to the specific details without departing from the general concept defined by the claims and the scope of equivalents.
Claims (7)
1. A quick recycling and cleaning treatment method for high-water-content household garbage is characterized by comprising the following specific steps:
(1) crushing: crushing the garbage raw material containing 50-80% of water by a crusher until the particle size is less than 50 mm;
(2) and (3) drying: the crushed garbage is contacted with hot air at the temperature of 200-300 ℃ for 15-60min, the temperature of the garbage is raised to 80-105 ℃, the moisture is reduced to 25-40%, and the hot air at the temperature of 200-300 ℃ is converted into hot humid air at the temperature of 120-200 ℃;
(3) pyrolysis: contacting the garbage at the temperature of 80-105 ℃ with the high-temperature flue gas at the temperature of 600-800 ℃, keeping the residence time for 15-60min, heating the garbage to the temperature of 300-600 ℃ to perform pyrolysis so as to generate carbon residue and pyrolysis gas at the temperature of 150-300 ℃, and converting the high-temperature flue gas into medium-temperature flue gas at the temperature of 300-400 ℃;
(4) purifying: after high-temperature dust removal and desulfurization are carried out on the 150-DEG C pyrolysis gas at 300 ℃, carbon residue particles and fuel gas are obtained;
(5) low-nitrogen combustion: the hot and humid air at the temperature of 120-200 ℃ generated in the step (2) and the fuel gas at the temperature of 150-300 ℃ are subjected to low-nitrogen combustion, the temperature of the high-temperature flue gas after combustion is adjusted to be at the temperature of 600-800 ℃, and the high-temperature flue gas is sent to the pyrolysis step (3);
(6) heat exchange: indirectly exchanging heat between the cold air and the 300-400 ℃ medium temperature flue gas generated in the step (3), heating the air to 200-300 ℃, sending the air to the drying step (2), cooling the flue gas to 120-160 ℃, and discharging;
(7) crushing: and (4) mixing the residual carbon obtained in the pyrolysis step (3) and the residual carbon particles obtained in the purification step (4), and crushing to obtain carbon powder with the particle size of 0.2-1 mm.
2. The method for rapidly recycling and cleaning high-water-content household garbage according to claim 1, wherein the garbage raw material is kitchen garbage or a mixture of kitchen garbage and other garbage.
3. The fast recycling and cleaning treatment method for high-water-content household garbage according to claim 1, wherein in the heat exchange step (6), the cold air is normal temperature air as a deodorizing gas of the whole treatment method system.
4. The rapid recycling and cleaning treatment method for high-water-content household garbage according to claim 1, characterized in that in the heat exchange step (6), NO in the discharged flue gasxThe content is less than or equal to 50mg/Nm3、SOxThe content is less than or equal to 35mg/Nm3CO content less than or equal to 20mg/Nm3The content of dioxin is less than or equal to 0.02ngTEQ/Nm3。
5. The method as claimed in claim 1, wherein in the step of pulverizing (7), the calorific value of the carbon powder is 1500-5000 Kcal/kg.
6. The utility model provides a quick resourceful clean processing system of high moisture domestic waste, includes breaker (1), drying device (2), pyrolysis device (3), purifier (4), burner (5), heat transfer device (6), reducing mechanism (7), its characterized in that:
the crushing device (1), the drying device (2), the pyrolysis device (3) and the crushing device (7) are communicated in sequence and used for crushing, drying and pyrolyzing the garbage raw materials, and carbon generated by the treatment of the pyrolysis device (3) enters the crushing device (7);
the purification device (4) is respectively communicated with the pyrolysis device (3), the crushing device (7) and the combustion device (5), pyrolysis gas generated by treatment of the pyrolysis device (3) enters the purification device (4) to be subjected to high-temperature dust removal and desulfurization treatment to obtain carbon ash and fuel gas, the carbon ash enters the crushing device (7) to be mixed and crushed with carbon to obtain carbon powder, and the fuel gas enters the combustion device (5);
the combustion device (5) is also respectively communicated with the drying device (2) and the pyrolysis device (3), hot and humid air discharged by the drying device (2) enters the combustion device (5) to be mixed and combusted with fuel gas, and generated high-temperature flue gas enters the pyrolysis device (3) and is converted into medium-temperature flue gas after heat supply;
heat transfer device (6) communicate with drying device (2), pyrolysis device (3) respectively, and pyrolysis device (3) exhaust medium temperature flue gas gets into heat transfer device (6), takes place heat exchange with the cold air among heat transfer device (6), and the hot-air that produces gets into drying device (2), discharges clean flue gas.
7. The system for rapidly recycling and cleaning high-water-content household garbage according to claim 6, wherein an electric heating device (8) is arranged in a communication pipeline between the drying device (2) and the combustion device (5), the system is started for the first time to heat air in an electric heating mode so as to provide heat for the pyrolysis device (3), and after the system is stably operated, the electric heating device (8) is closed.
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