CN104006389A - Rubbish thermal decomposition and gasification incineration method and system - Google Patents
Rubbish thermal decomposition and gasification incineration method and system Download PDFInfo
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- CN104006389A CN104006389A CN201410267151.3A CN201410267151A CN104006389A CN 104006389 A CN104006389 A CN 104006389A CN 201410267151 A CN201410267151 A CN 201410267151A CN 104006389 A CN104006389 A CN 104006389A
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Abstract
The invention provides a rubbish thermal decomposition and gasification incineration method and system. The rubbish thermal decomposition and gasification incineration method comprises the steps that (A1) rubbish enters a thermal decomposition and gasification furnace after being pre-dried, and air enters the thermal decomposition and gasification furnace from the top and the bottom of the thermal decomposition and gasification furnace; (A2) the rubbish is thermal-decomposed and gasified when the rubbish falls in the thermal decomposition and gasification furnace, generated combustible gas is led out from the middle of the thermal decomposition and gasification furnace; (A3) residual carbon continue to move downwards in the gasification furnace, a gasification reaction is conducted between the residual carbon and air entering the thermal decomposition and gasification furnace from the bottom of the thermal decomposition and gasification furnace, generated combustible gas is led out from the middle of the thermal decomposition and gasification furnace, and generated furnace ash is discharged out from an ash discharging port formed in the bottom of the thermal decomposition and gasification furnace. The rubbish thermal decomposition and gasification incineration method and system have the advantages that energy sources can be utilized efficiently, the gasification efficiency is high, and the environmental friendliness performance is high.
Description
Technical field
The present invention relates to garbage disposal, particularly utilize refuse pyrolysis method for gasifying and incinerating and system.
Background technology
Along with Re-search on Urbanization accelerates, increasing city is faced with the situation of garbage-surrounded city.Waste incineration has become the main way of garbage disposal in the world.At present, there are recirculating fluidized bed, grate furnace, three kinds of type of furnaces of incinerator for thermal decomposition in China in incineration treatment of garbage mode.Circulating fluidized bed incinerator and grate furnace technology are improved reliable, and capacity is large, rubbish strong adaptability, the compatibly processing of the extensive house refuse of city-level.For Yu Ji city, county, its quantity of refuse is generally at 300t/d, incinerator for thermal decomposition, because of advantages such as the discharge of poisonous waste such as investment is lower, the high, bioxin of ignition temperature are few, is acknowledged as the best-of-breed technology route of territory, following county level consumer waste innocent, resource, energy.
For refuse pyrolysis gasification furnace, mainly contain following two kinds according to flow direction in gas stove:
Gasification furnace lower end ventilates, combustion gas is discharged from upper end, referred to as updraft type.According to the physicochemical characteristics of house refuse, the generation flow of QI being obstructed of updraft type pyrolysis gasification furnace is crossed high-temperature region, and tar content is higher, easily causes pipeline coking on the way even to stop up.But advantage is the hot air dries that material is upwards flowed, be suitable for the material of moisture content higher (moisture content can reach 50%).
Gasification furnace upper end ventilates, combustion gas is discharged from lower end, referred to as downdraft; Downdraft outstanding advantages is to generate gas to pass through high-temperature region, therefore tar content is lower in generation gas, shortcoming is that pyrolysis gasification furnace is applicable to the material that moisture content is not high (moisture content is lower than 30%), and a large amount of heat energy that discharge in slag are failed to absorb and wasted.
Summary of the invention
In order to solve the deficiency in above-mentioned prior art scheme, the invention provides the refuse pyrolysis method for gasifying and incinerating of a kind of high efficiency of energy utilization, energy-saving and environmental protection.
The object of the invention is to be achieved through the following technical solutions:
Refuse pyrolysis method for gasifying and incinerating, described refuse pyrolysis method for gasifying and incinerating comprises the following steps:
(A1) rubbish enters in pyrolysis gasification furnace after predrying; Air enters in stove from top and the bottom of described pyrolysis gasification furnace;
(A2) rubbish pyrolysis in decline process, gasification in described pyrolysis gasification furnace, the imflammable gas of generation is drawn from gasification furnace middle part;
(A3) residual carbon continues to move down in gasification furnace, and reacts with the air generating gasification that bottom enters, and the imflammable gas of generation is drawn from gasification furnace middle part, and the ashes of generation are discharged from the ash discharging hole of gasification furnace bottom.
According to above-mentioned method, alternatively, described method is further comprising the steps:
(B1) imflammable gas and the air heat-exchange of discharge gasification furnace, the air after heat exchange enters in drier, and heating enters the rubbish of pyrolysis gasification furnace.
According to above-mentioned method, alternatively, described method is further comprising the steps:
(B2) imflammable gas after heat exchange enters burning Indoor Combustion.
The present invention also aims to provide the refuse pyrolysis gasification burning system of a kind of high efficiency of energy utilization, energy-conserving and environment-protective; This goal of the invention is achieved by the following technical programs:
A kind of refuse pyrolysis gasification burning system, described refuse pyrolysis gasification burning system comprises pyrolysis gasification furnace, it is characterized in that:
The top of described pyrolysis gasification furnace has garbage inlet, the first air intlet, and bottom has ash discharging hole, the second air intlet, and middle part has gas vent.
According to above-mentioned system, alternatively, described refuse pyrolysis gasification burning system further comprises:
Heat-exchanger rig, described heat-exchanger rig has the 3rd air intlet, air outlet slit and fuel gas inlet, gas outlet, and air outlet slit is communicated with drying device, and described fuel gas inlet is communicated with described gas vent;
Drying device, the port of export of described drying device connects described garbage inlet.
According to above-mentioned system, alternatively, described refuse pyrolysis gasification burning system further comprises:
Combustion chamber, the import of described combustion chamber is communicated with described gas outlet;
Air-introduced machine, described air-introduced machine is arranged on the pipeline between described combustion chamber and heat-exchanger rig.
Compared with prior art, the beneficial effect that the present invention has is:
1, gasification furnace is taked upper and lower end air intake, and combustion gas is discharged from stove middle part, has solved the problem that combustion gas that garbage feeding and ash discharge cause is overflowed;
2, the Secondary Air that the carbon residue that gasification furnace produces and bottom enter carries out gasification reaction, generates the higher combustible gas of calorific value, has greatly improved the gasification efficiency of rubbish;
3, the generation gas in gasification furnace is by high-temperature region, and the tar content in gas reduces in a large number;
The combustible gas of 4, discharging gasification furnace is after air to air heat exchanger, and temperature is reduced to 380 degree left and right, the temperature that the air-introduced machine that reaches a high temperature can bear; Wherein the air after heat exchange directly passes in (drum-type) drier, is dried entering stokehold rubbish, has improved the efficiency of energy utilization of system;
In heat transfer process, most of dust can be deposited in convection bank, finally discharges from ash exhauster, greatly reduces the dust content in fuel gas, reduces the risk of line clogging;
5, slag can be realized dried slag removing, and wherein heat is absorbed and used by air intake heat exchange, and energy is efficiently utilized.
Brief description of the drawings
With reference to accompanying drawing, disclosure of the present invention will be easier to understand.Those skilled in the art hold intelligible: these accompanying drawings are only for illustrating technical scheme of the present invention, and are not intended to protection scope of the present invention to be construed as limiting.In figure:
Fig. 1 is the structure diagram of refuse pyrolysis gasification burning system of the present invention.
Detailed description of the invention
Fig. 1 and following declarative description optional embodiment of the present invention how to implement and to reproduce the present invention with instruction those skilled in the art.In order to instruct technical solution of the present invention, simplify or omitted some conventional aspects.Those skilled in the art should understand that be derived from these embodiments modification or replace will be within the scope of the invention.Those skilled in the art should understand that following characteristics can combine to form multiple modification of the present invention in every way.Thus, the present invention is not limited to following optional embodiment, and is only limited by claim and their equivalent.
Embodiment 1:
The refuse pyrolysis method for gasifying and incinerating of the embodiment of the present invention, described refuse pyrolysis method for gasifying and incinerating comprises the following steps:
(A1) rubbish enters in pyrolysis gasification furnace after predrying; Air enters respectively in stove from top and the bottom of described pyrolysis gasification furnace;
(A2) pyrolysis in the decline process of rubbish in described pyrolysis gasification furnace top, gasification, the imflammable gas of generation is drawn from gasification furnace middle part;
(A3) residual carbon continues to move down in gasification furnace, and carries out gasification reaction with the air that bottom enters, and the imflammable gas of generation is drawn from gasification furnace middle part, and the ashes of generation are discharged from the ash discharging hole of gasification furnace bottom.
The imflammable gas producing in order to effectively utilize gasification furnace, alternatively, described method is further comprising the steps:
(B1) imflammable gas and the air heat-exchange of discharge gasification furnace, the air after heat exchange enters in drier, and heating enters the rubbish of pyrolysis gasification furnace.
In order to utilize further the energy producing in refuse pyrolysis gasification, alternatively, described method is further comprising the steps:
(B2) imflammable gas after heat exchange enters burning Indoor Combustion.
Fig. 1 has schematically provided the structure diagram of the embodiment of the present invention (for implementing said method) refuse pyrolysis gasification burning system, and as shown in Figure 1, described refuse pyrolysis gasification burning system comprises:
Pyrolysis gasification furnace 1, the top of described pyrolysis gasification furnace has garbage inlet, the first air intlet 11, and bottom has ash discharging hole 13, the second air intlet 12, and middle part has gas vent 14.
In order to effectively utilize imflammable gas, alternatively, described refuse pyrolysis gasification burning system further comprises:
Heat-exchanger rig 3, described heat-exchanger rig has the 3rd air intlet, air outlet slit and fuel gas inlet, gas outlet, and air outlet slit is communicated with drying device 2, and described fuel gas inlet is communicated with described gas vent 14;
Drying device 2, the port of export of described drying device connects described garbage inlet.
In order to effectively utilize the imflammable gas after heat exchange, alternatively, described refuse pyrolysis gasification burning system further comprises:
Combustion chamber 5, the import of described combustion chamber is communicated with described gas outlet;
Air-introduced machine 4, described air-introduced machine is arranged on the pipeline between described combustion chamber and heat-exchanger rig.
Embodiment 2:
The application examples in domestic rubbish disposal according to the refuse pyrolysis method for gasifying and incinerating of embodiment 1 and system.
As shown in Figure 1, in this application examples, drying device 2 adopts rotary-drum drier, has garbage inlet 21, moisture outlet 22, and rubbish enters drier inner drying after sorting, enters in stove afterwards from gasification furnace 1 top.The first air enters, 11 and second air intlet 12 be separately positioned on top and the bottom of gasification furnace 1, combustible gas gas vent 14 is arranged on the middle part of gasification furnace 1, ash discharging hole 13 is arranged on the bottom of gasification furnace 1.Heat-exchanger rig 3 adopts heat exchanger, and the hot-air after heat exchange is transported in drier, to be dried house refuse, reduces the moisture in rubbish; Imflammable gas after heat exchange is sent into the interior burning in combustion chamber 5 through air-introduced machine 4.In heat-exchanger rig 3, have air duct and the combustible gas passage of mutual isolation, the bottom of heat-exchanger rig has ash content outlet 31, ash content outlet described in described combustible gas channel connection, and cold air is sent into by blower fan 32.5 bottoms, described combustion chamber have slag-drip opening 51, and required air is sent into by blower fan 52.
The course of work (being also refuse pyrolysis method for gasifying and incinerating) of above-mentioned refuse pyrolysis gasification burning system comprises the following steps:
(A1) rubbish enters rotary-drum drier inner drying after sorting, to reduce moisture, enters in stove afterwards from the top of gasification furnace;
Air enters respectively in stove from first air intlet at the top of described pyrolysis gasification furnace and the second air intlet of bottom;
(A2) pyrolysis in the decline process of rubbish in described pyrolysis gasification furnace top, gasification, the imflammable gas of generation is drawn from gasification furnace middle part;
The imflammable gas of drawing enters in heat exchanger, and the air after heat exchange enters in described drier with garbage drying;
Imflammable gas after heat exchange in air-introduced machine enters combustion chamber, burning produce cogeneration or heat supply;
(A3) residual carbon continues to move down in gasification furnace, and react with the air generating gasification that bottom enters, the imflammable gas producing is drawn from gasification furnace middle part, the cold air heat exchange that the hot ashes that produce and bottom enter, hot-air upwards flows, and colder ashes are discharged from the ash discharging hole of gasification furnace bottom.
Above-mentioned drier, heat-exchanger rig, air-introduced machine and combustion chamber all adopt prior art, and concrete structure and working method do not repeat them here.
Claims (6)
1. refuse pyrolysis method for gasifying and incinerating, described refuse pyrolysis method for gasifying and incinerating comprises the following steps:
(A1) rubbish enters in pyrolysis gasification furnace after predrying; Air enters in stove from top and the bottom of described pyrolysis gasification furnace;
(A2) rubbish pyrolysis in decline process, gasification in described pyrolysis gasification furnace, the imflammable gas of generation is drawn from gasification furnace middle part;
(A3) residual carbon continues to move down in gasification furnace, and reacts with the air generating gasification that bottom enters, and the imflammable gas of generation is drawn from gasification furnace middle part, and the ashes of generation are discharged from the ash discharging hole of gasification furnace bottom.
2. method according to claim 1, is characterized in that: described method is further comprising the steps:
(B1) imflammable gas and the air heat-exchange of discharge gasification furnace, the air after heat exchange enters in drier, and heating enters the rubbish of pyrolysis gasification furnace.
3. method according to claim 2, is characterized in that: described method is further comprising the steps:
(B2) imflammable gas after heat exchange enters burning Indoor Combustion.
4. a refuse pyrolysis gasification burning system, described refuse pyrolysis gasification burning system comprises pyrolysis gasification furnace, it is characterized in that:
The top of described pyrolysis gasification furnace has garbage inlet, the first air intlet, and bottom has ash discharging hole, the second air intlet, and middle part has gas vent.
5. system according to claim 4, is characterized in that: described refuse pyrolysis gasification burning system further comprises:
Heat-exchanger rig, described heat-exchanger rig has the 3rd air intlet, air outlet slit and fuel gas inlet, gas outlet, and air outlet slit is communicated with drying device, and described fuel gas inlet is communicated with described gas vent;
Drying device, the port of export of described drying device connects described garbage inlet.
6. system according to claim 5, is characterized in that: described refuse pyrolysis gasification burning system further comprises:
Combustion chamber, the import of described combustion chamber is communicated with described gas outlet;
Air-introduced machine, described air-introduced machine is arranged on the pipeline between described combustion chamber and heat-exchanger rig.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410267151.3A CN104006389A (en) | 2014-06-17 | 2014-06-17 | Rubbish thermal decomposition and gasification incineration method and system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410267151.3A CN104006389A (en) | 2014-06-17 | 2014-06-17 | Rubbish thermal decomposition and gasification incineration method and system |
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| CN104006389A true CN104006389A (en) | 2014-08-27 |
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| CN201410267151.3A Pending CN104006389A (en) | 2014-06-17 | 2014-06-17 | Rubbish thermal decomposition and gasification incineration method and system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104964273A (en) * | 2015-07-20 | 2015-10-07 | 唐仕锦 | Environment-friendly and energy-saving boiler |
| CN111412468A (en) * | 2020-04-03 | 2020-07-14 | 重庆秋松环保科技有限公司 | Pyrolysis gasification furnace for co-processing household garbage in industrial kiln |
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| CN1170116A (en) * | 1995-10-03 | 1998-01-14 | 株式会社荏原制作所 | Heat recovery system and power generation system |
| JP2001124319A (en) * | 1999-10-25 | 2001-05-11 | Hitachi Ltd | Waste processor |
| CN101334168A (en) * | 2007-06-29 | 2008-12-31 | 环保R&D公司 | Solid trash burner |
| CN100506953C (en) * | 2001-01-18 | 2009-07-01 | 独立行政法人科学技术振兴机构 | Apparatus for gasifying solid fuel |
| CN102226105A (en) * | 2011-05-20 | 2011-10-26 | 中国科学院广州能源研究所 | Method and device for mixed flow type gasification of biomass |
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2014
- 2014-06-17 CN CN201410267151.3A patent/CN104006389A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1170116A (en) * | 1995-10-03 | 1998-01-14 | 株式会社荏原制作所 | Heat recovery system and power generation system |
| JP2001124319A (en) * | 1999-10-25 | 2001-05-11 | Hitachi Ltd | Waste processor |
| CN100506953C (en) * | 2001-01-18 | 2009-07-01 | 独立行政法人科学技术振兴机构 | Apparatus for gasifying solid fuel |
| CN101334168A (en) * | 2007-06-29 | 2008-12-31 | 环保R&D公司 | Solid trash burner |
| CN102226105A (en) * | 2011-05-20 | 2011-10-26 | 中国科学院广州能源研究所 | Method and device for mixed flow type gasification of biomass |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104964273A (en) * | 2015-07-20 | 2015-10-07 | 唐仕锦 | Environment-friendly and energy-saving boiler |
| CN111412468A (en) * | 2020-04-03 | 2020-07-14 | 重庆秋松环保科技有限公司 | Pyrolysis gasification furnace for co-processing household garbage in industrial kiln |
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Application publication date: 20140827 |