CN115789662B - A waste pyrolysis gasification coupled cyclone furnace co-firing system and method - Google Patents
A waste pyrolysis gasification coupled cyclone furnace co-firing system and methodInfo
- Publication number
- CN115789662B CN115789662B CN202211469285.4A CN202211469285A CN115789662B CN 115789662 B CN115789662 B CN 115789662B CN 202211469285 A CN202211469285 A CN 202211469285A CN 115789662 B CN115789662 B CN 115789662B
- Authority
- CN
- China
- Prior art keywords
- garbage
- pyrolysis gasification
- furnace
- cyclone furnace
- cyclone
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Gasification And Melting Of Waste (AREA)
Abstract
本发明公开了一种垃圾热解气化耦合旋风炉掺烧处理系统与方法，利用垃圾热解气化技术，借助电站锅炉中烟气的热量，通过将热解气化产生的还原性气体喷入旋风炉内降低燃烧中产生的NOx x；并且通过旋风炉的高温环境与液态排渣技术，实现垃圾燃烧二噁英的完全降解和灰渣的综合处理与利用，其可实现在旋风炉中大规模无害化处理垃圾，在降低垃圾处理成本和提高垃圾利用效率的同时解决旋风炉NOx x排放、垃圾灰渣处理等难题，本发明将利用燃料特性互补原则与旋风炉的优势，实现低挥发分难燃或高碱金属燃料的大规模高效清洁燃烧利用，提高电厂经济效益的同时推进其碳减排进程。
This invention discloses a waste pyrolysis gasification coupled cyclone furnace co-firing system and method. Utilizing waste pyrolysis gasification technology and the heat from flue gas in a power plant boiler, the reducing gas generated during pyrolysis gasification is injected into the cyclone furnace to reduce NOx emissions during combustion. Furthermore, through the high-temperature environment of the cyclone furnace and liquid ash discharge technology, the complete degradation of dioxins from waste combustion and the comprehensive treatment and utilization of ash are achieved. This allows for large-scale, harmless treatment of waste in the cyclone furnace, reducing waste treatment costs and improving waste utilization efficiency while solving problems such as NOx emissions from cyclone furnaces and waste ash treatment. This invention leverages the principle of complementary fuel characteristics and the advantages of the cyclone furnace to achieve large-scale, efficient, and clean combustion of low-volatile , difficult-to-burn, or high-alkali metal fuels, improving the economic benefits of power plants while promoting their carbon emission reduction process.
Description
Technical Field
The invention belongs to the fields of thermal power generation and garbage treatment, and particularly relates to a system and a method for low-NO x mixed combustion harmless treatment of a garbage pyrolysis gasification coupling cyclone furnace.
Background
At present, the treatment mode of the household garbage mainly comprises landfill, composting and incineration, pyrolysis and gasification, wherein the garbage incineration has been rapidly developed in recent years due to the advantages of obvious reduction, small occupied area and the like, and the annual treatment amount of the household garbage reaches 1.22 hundred million tons. However, the garbage incineration technology can also discharge conventional pollutants such as SO 2 and NO x and characteristic pollutants such as dioxin and heavy metals while efficiently treating garbage, SO that serious 'neighbor-avoidance effect' is caused. HCl and dioxin are both chlorine-containing pollutants produced by incineration techniques. HCl not only seriously damages the human body, but also causes general corrosion of the heating surface, thereby limiting the steam parameters and the power generation efficiency of the garbage incineration power plant. The secondary pollution problem generated by the garbage incineration becomes the bottleneck of the development of the garbage incineration technology, and severely restricts the process of urban household garbage treatment.
How to realize rapid emission reduction and enhance the viability of enterprises is a problem to be solved urgently for coal-fired units at present. The coupling combustion of continuously generated garbage and coal on a large-scale coal-fired unit is a promising garbage high-efficiency treatment and coal-fired unit CO 2 emission reduction technology, and has the advantages of improving the garbage power generation efficiency, reducing the fossil fuel consumption of the coal-fired unit, promoting the carbon emission reduction process of the coal-fired unit, realizing large-scale garbage treatment under the condition of low blending ratio, reducing the emission of pollutants such as CO, NO x and dioxin, avoiding the asset rest of the coal-fired unit and avoiding the repeated investment of a garbage incineration power plant. Therefore, the coal and garbage coupled combustion technology can realize efficient and clean garbage recycling treatment and low-carbon emission, and has good social and environmental benefits.
However, for the traditional solid slag-discharging boiler, the coupling utilization of garbage inevitably causes the increase of the emission of characteristic pollutants such as dioxin, heavy metals and the like, so that the treatment difficulty of the coal-fired fly ash is increased, the comprehensive utilization efficiency of ash is reduced, and the problems of 'neighbor effect' and the reduction of ash benefit are caused. The cyclone combustion technology of liquid slag discharge can not only realize complete decomposition of dioxin in flue gas at ultrahigh temperature, but also melt and solidify ash by means of ash capture in a cyclone furnace, cooperative treatment in a fly ash return furnace and the like, realize harmless treatment of pollutants such as dioxin, heavy metals and the like in ash, solve the difficult problem of coal and garbage coupling combustion ash utilization, and have great development and application prospects. However, the emissions of the cyclone furnace NO x under conventional air combustion conditions are too high to meet increasingly stringent pollutant emission requirements.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a low NO x mixing burning harmless treatment system and method for a garbage pyrolysis gasification coupling cyclone furnace, which are used for reducing NO x generation by spraying garbage pyrolysis gasification gas into the cyclone furnace through combining the garbage pyrolysis gasification technology with the cyclone burning technology, realizing harmless treatment of garbage by means of high temperature in the cyclone furnace, reducing garbage treatment cost, improving garbage utilization efficiency, and solving the problems of NO x emission of the cyclone furnace, garbage ash treatment and the like.
The invention is realized by the following technical scheme:
A low-NO x mixed combustion harmless treatment system of a garbage pyrolysis gasification coupling cyclone furnace comprises a pyrolysis gasification furnace, a garbage burner, a cyclone furnace, a coal mill, a granulating water tank, a boiler body and an air preheater,
The garbage charcoal outlet of the pyrolysis gasification furnace is connected with a garbage burner through a pipeline, the pyrolysis gasification gas outlet of the pyrolysis gasification furnace is connected with a cyclone furnace through a pipeline, the cyclone furnace is arranged at the bottom of the boiler body, the air preheater is arranged in a tail flue of the boiler body, a blower is arranged at the inlet of the air preheater, the outlet of the coal mill is connected with a coal dust/powder burner through a pipeline, the inlet of the coal mill is connected with the outlet of the air preheater through a pipeline, the garbage burner is arranged at a garbage charcoal primary air nozzle of the cyclone furnace, the coal dust/powder burner is arranged at a coal dust/powder primary air inlet of the cyclone furnace, and the granulating water tank is arranged at the bottom of a hearth of the boiler body.
Preferably, a high-temperature combustion area, an NO x reduction area and a burnout area are arranged in the cyclone furnace, the garbage burner is communicated with the high-temperature combustion area of the cyclone furnace, a garbage pyrolysis gasification gas outlet of the pyrolysis gasification furnace is connected with a nozzle on the cyclone furnace through a pipeline, and the nozzle is arranged on the NO x reduction area of the cyclone furnace.
Preferably, the bottom of the hearth of the boiler body is provided with a slag flowing port which is communicated with the burnout zone of the cyclone furnace, and the granulating water tank is arranged at the bottom of the slag flowing port.
Preferably, a secondary air nozzle is further arranged on the high-temperature combustion area in the cyclone furnace, and the secondary air nozzle is connected with a secondary air outlet of the air preheater through a pipeline.
Preferably, one path of a primary air outlet of the air preheater is connected with the coal mill, and the other path of the primary air outlet of the air preheater is connected with the pyrolysis gasifier.
Preferably, a high-temperature circulating fan is arranged between the hearth flue of the boiler body and the pyrolysis gasifier, circulating smoke extraction points are arranged in the hearth flue of the boiler body, smoke is extracted by the high-temperature circulating fan at the circulating smoke extraction points, and the temperature in the hearth flue is 700-800 ℃.
Preferably, a hopper is arranged at the inlet of the pyrolysis gasification furnace, garbage in the hopper is fed into the pyrolysis gasification furnace through a screw feeder, and the screw feeder is arranged at the bottoms of the hopper and the pyrolysis gasification furnace.
Preferably, the garbage crusher is further provided with a garbage storage pit and a garbage crusher, wherein garbage in the garbage storage pit is sent to the garbage crusher for crushing and then sent to the pyrolysis gasification furnace through the hopper.
Preferably, a plurality of cyclone furnaces can be arranged according to the actual capacity and the fuel property of the power plant and distributed on two sides of the boiler body.
A low NO x mixed combustion harmless treatment method of a garbage pyrolysis gasification coupling cyclone furnace comprises,
S1, delivering garbage into a pyrolysis gasification furnace for pyrolysis gasification, delivering pyrolysis gasification gas obtained by pyrolysis into a cyclone furnace, reducing NO x generated in cyclone combustion, combusting and utilizing the gas in a hearth of a boiler body, and delivering hot primary air generated by the garbage carbon obtained by pyrolysis into the cyclone furnace for combustion through a garbage combustor;
S2, feeding hot primary air generated by an air preheater after coal is ground by a coal mill into a cyclone furnace through a coal powder burner for combustion,
S3, melting coal and garbage carbon at high temperature in a cyclone furnace, completely degrading characteristic pollutants generated by garbage combustion at high temperature, enabling slag films in a molten state attached to the inner wall of the cyclone furnace to flow into a granulating water tank, and solidifying heavy metal pollutants in the slag, thereby realizing harmless treatment of garbage.
Compared with the prior art, the invention has the following beneficial technical effects:
The invention aims to provide a low NO x blending combustion harmless treatment system and method for a garbage pyrolysis gasification coupling cyclone furnace, which can realize large-scale harmless treatment of garbage in the cyclone furnace, reduce garbage treatment cost and improve garbage utilization efficiency, and solve the problems of NO x emission of the cyclone furnace, garbage ash treatment and the like. The invention utilizes the garbage pyrolysis gasification technology, and by means of the heat of flue gas in a power station boiler, the reducing gas generated by pyrolysis gasification is sprayed into the cyclone furnace to reduce NO x generated in combustion, and the complete degradation of dioxin in garbage combustion and the comprehensive treatment and utilization of ash are realized by the high-temperature environment of the cyclone furnace and the liquid slag discharge technology. In addition, the invention utilizes the fuel property complementation principle and the advantages of the cyclone furnace to realize the large-scale efficient clean combustion utilization of low-volatile flame-retardant or high-alkali metal fuel, and promotes the carbon emission reduction process while improving the economic benefit of the power plant. The invention combines the garbage pyrolysis gasification technology with the cyclone combustion technology, reduces NO x generation by spraying the garbage pyrolysis gasification gas into the cyclone furnace, and realizes harmless treatment of garbage by means of high temperature in the cyclone furnace.
Furthermore, the system of the invention utilizes the garbage pyrolysis gasifier and the large cyclone coal-fired unit in a coupling way to carry out garbage harmless treatment, can efficiently treat a large amount of household garbage in a large scale, breaks the difficulty of garbage surrounding cities, fully utilizes the heat value of the urban household garbage by virtue of the characteristic of high power generation efficiency of the large coal-fired unit, improves the garbage utilization efficiency and reduces the garbage treatment cost;
furthermore, the system utilizes the high-temperature environment and the liquid slag discharging characteristics of the cyclone furnace to realize the complete degradation of dioxin generated by the incineration of the garbage and the solidification of heavy metal pollutants in ash, thereby effectively solving the problem of secondary pollution of the incineration of the garbage, completing the comprehensive treatment and utilization modes and the efficiency innovation of the ash of the garbage, reducing the treatment cost of the dioxin and the heavy metal and improving the economic benefit of a power plant;
Further, the system and the method remarkably reduce NO x generation in the initial combustion process of the cyclone furnace, break the application bottleneck of the cyclone furnace, reduce the operation cost of the denitration device such as SCR and the like and greatly improve the investment and operation economy of a power plant by various modes such as separation and injection of the pyrolysis gasification gas of the garbage, blending combustion of the garbage and the circulated flue gas, arrangement of a main combustion zone, a NO x reduction zone and a burnout zone and the like.
Furthermore, the system changes waste into valuable, fully utilizes energy in the waste on the premise of ensuring cleanness and comprehensive utilization of ash, increases the waste treatment benefit and reduces the fuel cost of the power plant, obviously improves the economic benefit of the power plant, and promotes the CO 2 emission reduction of the power plant.
Furthermore, the system and the method are simple and effective, simplify the transformation of the active power plant, and only the garbage pyrolysis gasifier and the garbage storage device are added into the original system.
Drawings
FIG. 1 is a flow chart of a low NO x blending combustion harmless treatment system of a garbage pyrolysis gasification coupled cyclone furnace;
In the figure, 1 is a garbage storage pit, 2 is a garbage crusher, 3 is a screw feeder, 4 is a hopper, 5 is a pyrolysis gasifier, 6 is a garbage burner, 7 is a coal dust/powder burner, 8 is a secondary air nozzle, 9 is a garbage pyrolysis gasification gas nozzle, 10 is a cyclone furnace, 11 is a coal mill, 12 is a slag flow port, 13 is a granulating water tank, 14 is a boiler body, 15 is an air preheater, 16 is a blower, and 17 is a high-temperature circulating fan.
Detailed Description
The invention will now be described in further detail with reference to specific examples, which are intended to illustrate, but not to limit, the invention.
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
The invention aims to provide a low NO x blending combustion harmless treatment system and method for a garbage pyrolysis gasification coupling cyclone furnace, which can realize large-scale harmless treatment of garbage in the cyclone furnace, reduce garbage treatment cost and improve garbage utilization efficiency, and solve the problems of NO x emission of the cyclone furnace, garbage ash treatment and the like. The invention utilizes the garbage pyrolysis gasification technology, and by means of the heat of flue gas in a power station boiler, the reducing gas generated by pyrolysis gasification is sprayed into the cyclone furnace to reduce NO x generated in combustion, and the complete degradation of dioxin in garbage combustion and the comprehensive treatment and utilization of ash are realized by the high-temperature environment of the cyclone furnace and the liquid slag discharge technology. In addition, the invention utilizes the fuel property complementation principle and the advantages of the cyclone furnace to realize the large-scale efficient clean combustion utilization of low-volatile flame-retardant or high-alkali metal fuel, and promotes the carbon emission reduction process while improving the economic benefit of the power plant.
Referring to fig. 1, the low-NO x blending combustion harmless treatment system of the garbage pyrolysis gasification coupling cyclone furnace comprises a garbage storage pit 1, a garbage crusher 2, a screw feeder 3, a hopper 4, a pyrolysis gasification furnace 5, a garbage burner 6, a coal dust/powder burner 7, a secondary air nozzle 8, a garbage pyrolysis gasification gas nozzle 9, a cyclone furnace 10, a coal mill 11, a slag runner 12, a granulating water tank 13, a boiler body 14, an air preheater 15, a blower 16, a high-temperature circulating fan 17 and a high-temperature combustion zone, a NO x reduction zone and a burnout zone which are sequentially arranged in the cyclone furnace along the length direction of the cyclone.
The garbage storage pit 1 conveys garbage to the crusher 2 through a grab bucket, the garbage naturally drops to the garbage hopper 4 after being crushed, the screw feeder 3 is arranged at the bottoms of the hopper 4 and the pyrolysis gasifier 5, garbage pyrolysis gasification gas is conveyed to a cyclone furnace hearth through a connecting nozzle 9, garbage carbon is connected to a garbage carbon inlet of the cyclone furnace 10 through a pipeline and is conveyed to the cyclone furnace 10 through primary conveying, circulating flue gas is extracted through a proper temperature window point selected by the boiler body 14, is conveyed to an interlayer of the pyrolysis gasifier 5 through the pipeline to provide heat, is connected with the circulating fan 17 through the pipeline and is conveyed into the cyclone furnace or the boiler body, the coal mill 11 is connected with a coal dust/powder primary air nozzle through the pipeline, a granulating water tank is arranged below the slag flowing port 12, and the air preheater is arranged in a tail flue of the boiler;
the cyclone furnace is arranged at the bottom of the boiler body and is a main combustion area of fuel, the temperature can reach 1650 ℃, the air preheater is arranged in a tail flue of the boiler body, the granulating water tank is positioned at the bottom of a boiler hearth and is used for cooling and granulating slag, circulating smoke extraction points are arranged in the boiler flue, high-temperature smoke with proper temperature is extracted by a high-temperature circulating fan during working, and the high-temperature smoke is sent into the garbage pyrolysis gasification furnace to provide energy for garbage pyrolysis gasification. The garbage after being stored in the garbage storage pit for a period of time is sent to the crusher for simple crushing and then is sent to the hopper, the garbage is sent to the pyrolysis gasifier for pyrolysis gasification reaction through the screw feeder, garbage carbon and pyrolysis gasification gas are obtained at the outlet, the garbage carbon is sent to the cyclone gasifier for combustion treatment under the action of hot primary air through the garbage burner, the garbage pyrolysis gasification gas is sprayed into the NO x reduction zone of the cyclone gasifier through the garbage pyrolysis gasification gas spraying port to reduce generated NO x and is used for combustion, coal blocks are sent to the pulverizing system, coal dust or coal dust ground to proper fineness through the coal dust/powder burner is sprayed into the cyclone gasifier for combustion utilization, fuel in the cyclone gasifier is burnt vigorously in the cyclone field to form a stable slag film on the wall surface of the cyclone gasifier, the slag is continuously flowed into the granulating water tank through the slag port for comprehensive utilization of ash after being cooled, the required heat for gasification is supplied with hearth flue gas, the required by the circulating flue gas is pumped from a proper position inside the hearth through the high-temperature circulating fan, the hearth is returned to the hearth or part of the cyclone gasifier is injected into the cyclone gasifier for combustion utilization, and a small amount of required oxygen is supplied to the pyrolysis gasification system for the pyrolysis gasification, and the small amount of air is supplied to the pyrolysis gasification system for the pyrolysis furnace after the waste is pumped into the cyclone furnace.
A valve is arranged on a connecting pipeline between one path of a primary air outlet of the air preheater 15 and the coal mill 11, and a valve is arranged on a connecting pipeline between the other path of the primary air outlet and the pyrolysis gasification furnace 5;
the invention is further improved in that the inside of the cyclone furnace is sequentially arranged along the length direction of the cyclone furnace and can be further divided into a high-temperature combustion area, an NO x reduction area and a burnout area.
According to the invention, the hot air quantity and the temperature of the waste pyrolysis gasification furnace are regulated by using an air mixing mode, pyrolysis gas is sent into the cyclone furnace for NO x reduction and pollutant degradation, and residual waste is sent into the cyclone furnace for combustion treatment under a high temperature condition.
The cyclone furnaces can be arranged in a plurality according to the actual capacity and the fuel property of the power plant and distributed at two sides of the boiler body, and can be selected to be horizontal or vertical according to factors such as site limitation and the like;
According to the invention, the water cooling system with pins and the slag supplementing tube bundle are arranged in the cyclone furnace, so that the purposes of stabilizing slag films and capturing slag at the outlet of the cyclone furnace are achieved.
The invention adopts the mode of respectively storing and pulverizing coal and garbage to grind or crush two fuels of coal and garbage, can meet the different particle size requirements of the two fuels, and the coal mill of the coal can be selected as a medium-speed fan mill or a steel ball mill according to the particle size requirements of coal dust.
The ratio of the over-fire air in the invention can be selectively increased, and on the basis of increasing acceptable NO x emission, the over-fire rate of fuel is further improved, the carbon content of fly ash is reduced, and the boiler efficiency is improved.
The system and the method aim at a mixed combustion system of the garbage and the coal, have strong adaptability to the types and the quality of the garbage and the coal, and are particularly suitable for the combustion utilization of biomass garbage, high alkali metal coal types and low-volatile fuel including semicoke, anthracite and lean coal.
The semicoke low NO x blending combustion method provided by the invention has the main flow and parameters summarized as follows:
1. The position of the circulating fan for extracting the flue gas can be adjusted according to the temperature field in the hearth, and the temperature can be selected to be 700-900 ℃.
2. The excess air coefficient in the high-temperature combustion area of the cyclone furnace is controlled to be lower than 0.8, so that the creation of high-temperature reducing atmosphere is ensured, and the generation of NO x is reduced from the source.
3. The flow of the pyrolysis gasification gas of the garbage can be adjusted according to the requirement through the amount of hot air introduced into the pyrolysis furnace, and the gas composition in the hot air is controlled, so that the purposes of maximally reducing NO x to generate and reducing the amount of unburnt fuel are achieved.
4. The garbage storage time can be adjusted according to the property water content, the heat value and the like of different municipal domestic garbage, and the garbage storage time can be controlled to be 1-4 days;
5. The garbage can be simply crushed, and the size requirements of a hopper, a screw feeder and a garbage burner are met, so that the output is saved, the cyclone furnace can stably burn when the particle size requirement of the cyclone furnace on coal is less than 5mm, and the economic fineness can be calculated according to the actual situation, so that the combustion efficiency and the economic benefit are maximized;
6. The extraction position of the circulating flue gas is generally positioned in a boiler hearth, and the position of a horizontal flue can be selected according to a temperature interval;
The invention provides a method for realizing semicoke low-NO x doped combustion by chemical chain space division, which is implemented as follows:
A low NO x blending combustion harmless treatment method of a garbage pyrolysis gasification coupling cyclone furnace comprises the following steps:
1. The collected garbage is firstly stored for a period of time through a garbage storage pit 1 to reduce the water content, then is sent to a crusher 2 to be crushed simply, is sent to a pyrolysis gasification furnace 5 to be pyrolyzed and gasified, the drying of the water content and the advanced removal of part of pollutants under the condition of low oxygen are realized, and pyrolysis gas obtained by pyrolysis contains a large amount of hydrocarbon, H and other free radicals and is sent to a NO x reduction zone of a cyclone furnace 10 to reduce a large amount of NO x generated in cyclone combustion and is combusted and utilized in a hearth.
2. The heat required by the garbage pyrolysis gasification furnace 5 is mainly provided by high-temperature circulating flue gas in the extraction hearth, part of the heat is generated by the reaction of oxygen in hot air and garbage to improve the energy utilization efficiency, and in addition, the circulating flue gas at the outlet of the pyrolysis gasification furnace 5 is mainly returned to the hearth, and optionally part of the heat is introduced into a cyclone furnace to regulate and control the temperature of the cyclone furnace.
3. The coal is ground by an independent coal mill 11, and is sent into a cyclone furnace 10 through a pulverized coal burner 7 by hot primary air for combustion utilization so as to ensure a high-temperature environment in the cyclone furnace, the cyclone furnace has strong adaptability to fuel, the combustion heat capacity is high, the stable combustion can be ensured when the particle size of the coal is below 5mm, and the particle size of the coal can be controlled possibly according to the actual temperature condition of the cyclone furnace so as to save the output of a pulverizing system.
4. The cyclone furnace 10 is provided with a high-temperature combustion zone, an NO x reduction zone and a burnout zone, wherein garbage and coal in the high-temperature combustion zone are combusted in a high-temperature cyclone field formed by primary air and secondary air, pyrolysis gasification gas is sprayed in the NO x reduction zone to reduce generated NO x, circulating flue gas of the pyrolysis furnace is partially introduced into the cyclone furnace to control the temperature, and the burnout zone partially overlaps with the NO x reduction zone and extends to the inside of a hearth body to realize burnout of the coal and the garbage.
5. The coal and the garbage are sprayed into the furnace through different burners, the garbage ignition burnout performance is strong, the two are complemented by the fuel characteristics, the improvement of the coal combustion efficiency is realized, the combustion characteristics of the fuel are further improved by the ignition of the inflammable garbage, and the method is particularly suitable for the low-volatile flame-retardant coal. Furthermore, the arrangement positions of the two burners can be adjusted or exchanged according to actual conditions.
6. The slag film in molten state is adhered to the inner wall of cyclone furnace 10, and the slag film flows into granulating water tank via slag flowing port 12 in the form of liquid slag discharging, so that the heavy metal and other pollutants in the slag can be solidified, and the obtained slag can be comprehensively utilized to realize harmless treatment of the garbage.
7. The air is heated by the preheater and then used as primary air for conveying coal and garbage, secondary air and combustion air for supplying to the cyclone furnace for combustion, and oxygen in the pyrolysis furnace can be partially supplied to realize oxygen-controlled gasification of the garbage.
8. According to the actual running condition, the mixed air of hot air and pure oxygen or pure oxygen can be selected as the over-fire air, the reduction length of NO x is prolonged, unburnt fuel is vigorously combusted under the condition of high oxygen concentration, and the fuel combustion efficiency is obviously improved.
It should be understood that this example is only illustrative of the application and is not intended to limit the scope of the application. Further, it is to be understood that various changes and modifications may be made by those skilled in the art after reading the teachings of the present application, however, such equivalents are intended to fall within the scope of the application as defined in the appended claims.
The foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the invention in any way, and those skilled in the art may easily implement the present invention as shown in the drawings and described above, but many modifications, adaptations and variations of the present invention using the above disclosed technical matters without departing from the scope of the present invention, and meanwhile, any equivalent modifications, adaptations and variations of the above embodiments according to the essential technology of the present invention are within the scope of the technical matters of the present invention.
Claims (8)
1. The garbage pyrolysis gasification coupling cyclone furnace co-firing treatment system is characterized by comprising a pyrolysis gasification furnace (5), a garbage burner (6), a cyclone furnace (10), a coal mill (11), a granulating water tank (13), a boiler body (14) and an air preheater (15);
The garbage carbon outlet of the pyrolysis gasification furnace (5) is connected with a garbage combustor (6) through a pipeline, the pyrolysis gasification gas outlet of the pyrolysis gasification furnace (5) is connected with a cyclone furnace (10) through a pipeline, the cyclone furnace (10) is arranged at the bottom of a boiler body (14), the air preheater (15) is arranged in a tail flue of the boiler body (14), a blower (16) is arranged at the inlet of the air preheater (15), the outlet of the coal mill (11) is connected with a coal dust/powder combustor (7) through a pipeline, the inlet of the coal mill (11) is connected with the outlet of the air preheater (15) through a pipeline, the garbage combustor (6) is arranged at a garbage carbon primary air nozzle of the cyclone furnace (10), the coal dust/powder combustor (7) is arranged at a coal dust/powder primary air inlet of the cyclone furnace (10), and the granulating water tank (13) is arranged at the bottom of the boiler body (14);
the cyclone furnace (10) is internally provided with a high-temperature combustion zone, a NO x reduction zone and a burnout zone, the garbage burner (6) is communicated with the high-temperature combustion zone of the cyclone furnace (10), a garbage pyrolysis gasification gas outlet of the pyrolysis gasification furnace (5) is connected with a nozzle (9) on the cyclone furnace (10) through a pipeline, and the nozzle (9) is arranged on the NO x reduction zone of the cyclone furnace (10);
A high-temperature circulating fan (17) is arranged between a hearth flue of the boiler body (14) and the pyrolysis gasification furnace (5), circulating smoke extraction points are arranged in the hearth flue of the boiler body (14), smoke is extracted by the high-temperature circulating fan (17) at the circulating smoke extraction points, and the temperature in the hearth flue is 700-800 ℃.
2. The garbage pyrolysis gasification coupling cyclone furnace co-firing treatment system according to claim 1, wherein a slag flowing port (12) is arranged at the bottom of a hearth of the boiler body (14), the slag flowing port (12) is communicated with a burnout zone of the cyclone furnace (10), and the granulating water tank (13) is arranged at the bottom of the slag flowing port (12).
3. The garbage pyrolysis gasification coupling cyclone furnace co-firing treatment system according to claim 1, wherein a secondary air nozzle (8) is further arranged on a high-temperature combustion area in the cyclone furnace (10), and the secondary air nozzle (8) is connected with a secondary air outlet of an air preheater (15) through a pipeline.
4. The garbage pyrolysis gasification coupling cyclone furnace co-firing treatment system according to claim 1, wherein one path of a primary air outlet of the air preheater (15) is connected with a coal mill (11), and the other path is connected with a pyrolysis gasification furnace (5).
5. The garbage pyrolysis gasification coupling cyclone furnace co-firing treatment system according to claim 1 is characterized in that a hopper (4) is arranged at the inlet of the pyrolysis gasification furnace (5), garbage in the hopper (4) is fed into the pyrolysis gasification furnace (5) through a screw feeder (3), and the screw feeder (3) is arranged at the bottoms of the hopper (4) and the pyrolysis gasification furnace (5).
6. The garbage pyrolysis gasification coupling cyclone furnace co-firing treatment system according to claim 1, further comprising a garbage storage pit (1) and a garbage crusher (2), wherein garbage in the garbage storage pit (1) is sent to the garbage crusher (2) for crushing and then sent to the pyrolysis gasification furnace (5) through a hopper (4).
7. The garbage pyrolysis gasification coupled cyclone furnace co-firing treatment system according to claim 1, wherein a plurality of cyclone furnaces (10) can be arranged according to the actual capacity and fuel characteristics of a power plant and are distributed on two sides of a boiler body (14).
8. The garbage pyrolysis gasification coupled cyclone furnace co-firing treatment method based on the garbage pyrolysis gasification coupled cyclone furnace co-firing treatment system according to any one of claims 1-7 is characterized by comprising the steps of,
S1, delivering garbage into a pyrolysis gasification furnace (5) for pyrolysis gasification, delivering pyrolysis gasification gas obtained by pyrolysis into a cyclone furnace (10), reducing NO x generated in cyclone combustion, combusting and utilizing the gas in a hearth of a boiler body (14), and delivering hot primary air generated by pyrolysis of garbage carbon through an air preheater (15) into the cyclone furnace (10) for combustion through a garbage combustor (6);
S2, feeding hot primary air generated by an air preheater (15) after coal is ground by a coal mill (11) into a cyclone furnace (10) for combustion through a coal powder burner (7),
S3, melting coal and garbage carbon at high temperature in a cyclone furnace (10), completely degrading characteristic pollutants generated by garbage combustion at high temperature, enabling slag films in a molten state attached to the inner wall of the cyclone furnace (10) to flow into a granulating water tank (13), and solidifying heavy metal pollutants in ash residues, thereby realizing harmless treatment of garbage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211469285.4A CN115789662B (en) | 2022-11-22 | 2022-11-22 | A waste pyrolysis gasification coupled cyclone furnace co-firing system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211469285.4A CN115789662B (en) | 2022-11-22 | 2022-11-22 | A waste pyrolysis gasification coupled cyclone furnace co-firing system and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115789662A CN115789662A (en) | 2023-03-14 |
| CN115789662B true CN115789662B (en) | 2026-01-30 |
Family
ID=85440241
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211469285.4A Active CN115789662B (en) | 2022-11-22 | 2022-11-22 | A waste pyrolysis gasification coupled cyclone furnace co-firing system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115789662B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119123428A (en) * | 2024-10-23 | 2024-12-13 | 长安大学 | System and method for coal-fired coupled garbage cyclone oxygen-enriched combustion and fly ash melting treatment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101201167A (en) * | 2007-12-25 | 2008-06-18 | 哈尔滨工业大学 | Garbage gasification and fly ash high-temperature melting treatment device and method |
| CN102062393A (en) * | 2011-01-06 | 2011-05-18 | 西安交通大学 | Cyclone burning method and device for reburning fuel in cyclone drum for denitration |
| CN108019759A (en) * | 2017-12-28 | 2018-05-11 | 神雾科技集团股份有限公司 | A kind of refuse disposal system and processing method |
| CN216716231U (en) * | 2022-01-17 | 2022-06-10 | 广西山山科技开发有限公司 | Rural domestic waste pyrolysis gasification incinerator |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001248820A (en) * | 2000-03-08 | 2001-09-14 | Babcock Hitachi Kk | Waste melting treatment apparatus and waste melting treatment method |
| JP4996416B2 (en) * | 2007-10-15 | 2012-08-08 | 株式会社東芝 | Sludge fuel plant |
| CN201575464U (en) * | 2009-09-04 | 2010-09-08 | 中国市政工程华北设计研究总院 | Rubbish pyrolysis gasification device with solid heat carrier |
| CN106497579A (en) * | 2016-10-14 | 2017-03-15 | 北京神雾环境能源科技集团股份有限公司 | A kind of system and method for domestic garbage resource |
| CN108980836A (en) * | 2018-04-16 | 2018-12-11 | 长沙恒热能源科技有限公司 | It is a kind of efficiently to utilize biological resource system and its production technology |
| CN110822441A (en) * | 2019-10-30 | 2020-02-21 | 西安石油大学 | Efficient low-pollution combustion system of cyclone melting furnace for co-combustion of urban solid wastes |
-
2022
- 2022-11-22 CN CN202211469285.4A patent/CN115789662B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101201167A (en) * | 2007-12-25 | 2008-06-18 | 哈尔滨工业大学 | Garbage gasification and fly ash high-temperature melting treatment device and method |
| CN102062393A (en) * | 2011-01-06 | 2011-05-18 | 西安交通大学 | Cyclone burning method and device for reburning fuel in cyclone drum for denitration |
| CN108019759A (en) * | 2017-12-28 | 2018-05-11 | 神雾科技集团股份有限公司 | A kind of refuse disposal system and processing method |
| CN216716231U (en) * | 2022-01-17 | 2022-06-10 | 广西山山科技开发有限公司 | Rural domestic waste pyrolysis gasification incinerator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115789662A (en) | 2023-03-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102269402B (en) | Method and system for realizing NOx discharge reduction and stable combustion of power station boiler | |
| CN111637465B (en) | Treatment system and method for combustible industrial solid waste | |
| CN102003713A (en) | Method and device for combustible solid waste gasification combustion | |
| CN106524175B (en) | Castoff fusing curing process system and method | |
| CN1978591A (en) | Circulating fluidized bed heat-power-gas-tar multi-joint-production apparatus and method | |
| CN115789662B (en) | A waste pyrolysis gasification coupled cyclone furnace co-firing system and method | |
| CN113583718A (en) | Gasification and melting system and method for solid waste plasma for ship | |
| CN106524176B (en) | Waste gasification melt-combustion system | |
| CN114735918B (en) | Recycling treatment system for sludge | |
| KR101153930B1 (en) | The method and system to burn petroleum coke | |
| JP4652609B2 (en) | Coal combustion ash melting method and melt processing system | |
| CN106642138B (en) | waste gasification melting furnace | |
| CN1873326A (en) | Incineration treating method and system for gasifying and melting domestic waste from city | |
| CN114085684A (en) | Coal gasification slag plasma gasification cogeneration system and method | |
| CN206361692U (en) | Hazardous waste burn system is put in room burner coexistence | |
| CN117366581A (en) | A method and device for high-temperature melting disposal of hazardous waste with low-concentration nitrogen oxide emissions | |
| CN214664447U (en) | System for pulverized coal boiler co-burns refuse derived fuel | |
| CN212362044U (en) | Garbage disposal and generator set coupling power generation system | |
| JP2740644B2 (en) | Ash melting apparatus and method | |
| CN106118753A (en) | House refuse cleaning integrated gasification circulation cogeneration technique | |
| CN106765146A (en) | Secondary pollutant control system based on waste gasification melt-combustion | |
| CN117866666B (en) | A cement kiln coordinated coal gangue gasification system and method | |
| CN111964094B (en) | A system and method for coupling ash and slag utilization of biomass furnace and pulverized coal boiler | |
| CN221076477U (en) | Waste paper slag circulating fluidized bed incineration energy environment-friendly treatment device system | |
| CN223280794U (en) | Coal gasification treatment system of circulating fluidized bed gasifier coupled with carbon residue furnace |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20251128 Address after: 055550 Hebei Province Xingtai City Ningjin County East City Development Zone Applicant after: Xingtai furunde Chemical Co.,Ltd. Country or region after: China Address before: 710064 central section of south two ring road, Yanta District, Xi'an, Shaanxi Applicant before: CHANG'AN University Country or region before: China |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |