CN203162960U - Garbage low nitrogen and low dioxin fire grate incineration device - Google Patents
Garbage low nitrogen and low dioxin fire grate incineration device Download PDFInfo
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- CN203162960U CN203162960U CN 201220647254 CN201220647254U CN203162960U CN 203162960 U CN203162960 U CN 203162960U CN 201220647254 CN201220647254 CN 201220647254 CN 201220647254 U CN201220647254 U CN 201220647254U CN 203162960 U CN203162960 U CN 203162960U
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Abstract
The utility model discloses a garbage low nitrogen and low dioxin fire grate incineration device. The device comprises a first channel and an incineration furnace arranged at the bottom of the first channel, wherein blowing components, which enable flue gas in the first channel to form two groups of tangent circles and helically rise, are arranged along the surrounding walls of the first channel; the flue gas in the first channel forms two groups of tangent circles and helically rises through the blowing components; through adjusting the air volume of blowing nozzles of the blowing components, the temperature in the first channel is controlled to be 850-900 degrees; the residence time of the flue gas is over 2 seconds, and finally the flue gas flows to the outlet of the first channel; and after garbage at the tail end of the fire grate burns out, the generated furnace slag is discharged from a slag-drip opening, so that the processes of garbage low nitrogen and low dioxin fire grate incineration are completed. The device has the advantages of high combustion efficiency, excellent environment-friendly effect, low initial cost and running cost, and suitability for devices with a large-scale, a medium-scale or a small-scale treatment capacity for industrial garbage incineration and municipal garbage incineration.
Description
Technical field
The utility model relates to garbage incineration method and burning facility, relates in particular to the low nitrogen of a kind of rubbish and Di bioxin fire grate incinerator.
Background technology
Garbage-surrounded city is the problem that the city, various countries generally faces.Being that rubbish output increases year by year on the one hand, is quickening of urbanization process on the other hand, and the urban size constantly enlarges, and causes the garbage disposal problems of land utilization very severe.In Beijing, large size city such as Shanghai, Guangzhou, almost be difficult to find suitable garbage disposal land used.Simultaneously, because the improving constantly of resident's environmental consciousness, the secondary pollution problem that may bring waste treatment facilities such as landfill, burnings is pay attention to day by day also.
Contain a large amount of pollutant components in the flue gas that the waste incineration process produces, as flue dust, hydrogen chloride, oxysulfide, nitrogen oxide, carbon monoxide, heavy metal and two uh English etc.Nitrogen oxide comprises NO, NO2, N2O, N2O3, N2O4 and N2O5 etc.The main NO that produces in the waste incineration process, this is a kind of colourless toxic gas, accounts for fuel and produces 90% ~ 95% of nitrogen oxide total amount.NO2 is the gas that a kind of rufous has intense stimulus, accounts for and generates 5% ~ 10% of nitrogen oxide in the burning.The toxicity of NO2 is 5 times of NO, can cause the nervous centralis paralysis, easily causes lung cancer, and the heart of the human body of NO2, liver, kidney and hematopoietic tissue have infringement in addition.Photochemical reaction makes NO2 be decomposed into NO and O3 simultaneously, and ozone is extremely harmful to health in the atmosphere.In the waste incineration process, the mode that NOx produces has three kinds, is respectively heating power type, fuel type and quick type.Experiment shows that along with the rising of reaction temperature, its NOX reaction of formation speed is pressed index law to be increased.When temperature surpasses 1700K, the every increase of temperature 100K, reaction rate increases 6 ~ 7 times.The growing amount of fuel type NOX and the relation of excess air coefficient are very big, and less than 1 o'clock, its conversion ratio can significantly reduce at excess air coefficient, and such as when excessive air coefficient equals 0.7, its conversion ratio is close to zero.Type NOX formation time only needs 60ms fast, and the NOX that generates is directly proportional with furnace pressure 0.5 power, but little with temperature relation.
The liposoluble substance that bioxin is a kind of colorless and odorless, toxicity is serious, can damage multiple organ and system, in case enter human body, will be resident for a long time, because itself have chemical stability and be easy to be absorbed by adipose tissue, and from then on long-term savings may see through indirect physiological pathway and carcinogenic in vivo.It is in the burning process to plastic containing chlorines such as vinyl chloride that burning city domestic garbage produces the bioxin main path, and incineration temperature is lower than 800 ℃, and chloride rubbish imperfect combustion very easily generates bioxin; The burning back forms chlorobenzene, and the latter becomes the synthetic precursor of dioxin.
In the waste incineration process, in order to reduce NOX with the generation of bioxin can rely on fractional combustion to realize.At present, the urban domestic garbage incinerator fractional combustion is along flow of flue gas direction in the combustion chamber, and the secondary wind (SA) that mainly distributes is in the difficult control flue-gas temperature of first passage and the time of staying thereof.Therefore, be necessary to develop and be suitable for large, medium and small type treatment scale, the garbage incineration method of high-efficiency low-pollution and device thereof.
Summary of the invention
The purpose of this utility model is to overcome the shortcoming and defect of prior art, provides that a kind of technology is simple, gas residence time is long, the low nitrogen of the rubbish of sufficient combustion and Di bioxin fire grate incinerator.
The utility model is achieved through the following technical solutions:
The low nitrogen of a kind of rubbish and low bioxin fire grate incinerator comprise first passage and are arranged on the burning burner hearth of first passage bottom, are provided with the flue gas that makes in the first passage along the surroundings wall of first passage and form two groups of circle of contacts and spiralling blowing assembly.
Described blowing assembly is divided into four layers, is secondary wind assembly, tertiary air assembly, four wind assemblies, five wind assemblies from bottom to top successively; The structure of these four layers blowing assembly is identical, comprises back wall airduct assembly, left wall airduct assembly, front wall airduct assembly and right wall airduct assembly respectively.
Described back wall airduct assembly, left wall airduct assembly, front wall airduct assembly and right wall airduct assembly are provided with stop valve, servo valve, connection airduct and blowing nozzle.
Described burning burner hearth is surrounded by rear arch, burning furnace outlet, face arch, garbage inlet, fire grate, slag-drip opening and left and right sides side wall and forms.
The wall of described first passage is provided with a plurality of temperature sensors, be arranged in burn between furnace outlet and the secondary wind assembly, between secondary wind assembly and the tertiary air assembly, between tertiary air assembly and four the wind assemblies, between four wind assemblies and five the wind assemblies, between five wind assemblies and first passage export.
The utility model has the following advantages compared with prior art:
(1) the low nitrogen of this rubbish and Di bioxin fire grate incinerator are purpose with rubbish high-efficient low polluting combustion and heat clean utilization, by secondary wind assembly, the tertiary air assembly, four wind assemblies, the continuous obstruction of five wind assemblies, make flue gas in first passage, form two groups of circle of contacts and spiral and rise to the first passage outlet, spiralling flue gas, increased its upward stroke in first passage, prolong pollutants such as time of staying Wei bioxin and furans and stopped the condition of creating in 2 seconds more than 850 ℃, can the overwhelming majority burn bioxin, reduce pollutant emission, improve efficiency of combustion, reduced the operating cost of garbage disposal;
(2) 850 ~ 900 ℃ flue-gas temperature can reduce slagging scorification and the corrosion of heating surface, reduces the security incident generation and reduces operation and maintenance cost;
(3) repeatedly stratified combustion has been controlled the temperature of flue gas, when avoiding that NOx is a large amount of and generating, for the SNCR denitration provides the optimum temperature window, has reduced SNCR denitration running gear initial cost scale and operating cost;
More than comprehensive, the advantage that the utility model technological means is simple and easy to do, efficiency of combustion is high, environment protecting is good can be widely applicable for industry and domestic waste, and application prospect is wider.
Description of drawings
Fig. 1 is the low nitrogen of the utility model rubbish and Di bioxin fire grate incinerator structural representation.
Fig. 2 is the wherein distributed architecture schematic diagrames of one deck blowing assembly of four layers of blowing assembly shown in Figure 1.
Fig. 3 is the fluidised form schematic diagram of first passage 13 cross section flue gases stream 33 shown in Figure 2.
Fig. 4 is that the longitudinal section flue gas of the low nitrogen of the utility model rubbish and Di bioxin fire grate incinerator flows 33 fluidised form schematic diagrames.Show flue gas stream 33 among the figure under the jet action of each blowing nozzle 11, flue gas stream 33 forms two groups of circle of contacts, and rises at first passage 13 inside spins.
The specific embodiment
Below in conjunction with specific embodiment the utility model is done further concrete detailed description the in detail.
Embodiment
As Fig. 1, Fig. 3, shown in Figure 4.The low nitrogen of the utility model rubbish and Di bioxin fire grate incinerator, comprise first passage 13 and be arranged on the burning burner hearth 2 of first passage 13 bottoms, be provided with the flue gases 33 that make in the first passage 13 along the surroundings wall of first passage 13 and form two groups of circle of contacts and spiralling blowing assembly.
As shown in Figure 1 and Figure 2.Described blowing assembly is divided into four layers, is secondary wind assembly 3, tertiary air assembly 4, four wind assemblies 5, five wind assemblies 6 from bottom to top successively; The structure of these four layers blowing assembly is identical, comprises back wall airduct assembly A, left wall airduct assembly B, front wall airduct assembly C and right wall airduct assembly D respectively.These four layers spacing of drying between the assembly are 1/5th of first passage 13 height.Secondary wind assembly 3 distances are burned the distance of furnace outlet 14 between 0.5～1.0 meter.
As shown in Figure 2.Described back wall airduct assembly A, left wall airduct assembly B, front wall airduct assembly C and right wall airduct assembly D are provided with stop valve 7, servo valve 8, connect airduct and blowing nozzle 11.When being used for stopping transport, stop valve 8 isolates first passage 13 flue gases and servo valve 7, servo valve 7 is used for adjusting connection airduct air quantity size, the fresh air that blowing nozzle 11 will connect in the airduct sprays into first passage 13 according to predetermined angle and speed, make flue gas in first passage 13, form two groups of circle of contacts and spiralling flue gas stream, this spiralling flue gas stream has increased its upward stroke in first passage 13, guarantee temperature and the time of staying of flue gas, thereby satisfied the burning requirement of rubbish.
As shown in Figure 1.Described burning burner hearth 2 is surrounded by rear arch 1, burning furnace outlet 14, face arch 15, garbage inlet 16, fire grate 17, slag-drip opening 18 and left and right sides side wall 19 and forms.
As shown in Figure 1.The wall of described first passage 13 is provided with a plurality of temperature sensors 12, be arranged in burn between furnace outlet 14 and the secondary wind assembly 3, between secondary wind assembly 3 and the tertiary air assembly 4, between tertiary air assembly 4 and four the wind assemblies 5, between four wind assemblies 5 and five the wind assemblies 6, five wind assemblies 6 and first passage export between 9.Temperature sensor 12 is used for implementing to measure flue-gas temperature and air quantity provides the adjusting foundation for one, two, three, four, five time.
As shown in Figure 1.Rubbish enters the top of fire grate 17 initiating terminals through garbage inlet 16, fire grate 17 is reciprocal fire grate, be divided into five sections, each section becomes certain downward angle with garbage inlet 16 horizontal levels, the fire grate that tilts is convenient to rubbish and is travelled forward in combustion process, have vertical height between every section, but purpose is to lump or the rubbish of reuniting is met the vertical section freely falling body and fallen diffusing in the process of advancing; Rear arch 1 is much longer than face arch 15, and long rear arch 1 effect is for the drying of going into stove rubbish and catches fire fast radiations heat energy is provided, and the steam that short face arch 15 can convenient and dry produces flows out burning burner hearth 2 rapidly.
As Fig. 2, shown in Figure 3.Secondary wind assembly 3, tertiary air assembly 4, four wind assemblies 5 and five wind assemblies 6 on first passage 13 longitudinal sections, in first passage 13, spray into fresh air according to certain angle of inclination, namely, except the blowing assembly each blowing nozzle 11 spout all down, also become certain slanted angle with the wall of first passage 13, after fresh air sprays in the first passage 13 down according to predetermined angular and flue gas mix and to carry out repeated combustion, and form two groups of circle of contacts and spiralling flue gas stream 33.Its shape (see figure 4) is approximately 2 groups of circle of contacts and spiralling curve.Arrow among Fig. 3 is the angle of each blowing nozzle 11 jet-stream winds.As can be seen from Figure 2, the approximate acute angle of setting angle or the obtuse angle of blowing nozzle 11 and connection airduct.
The low nitrogen of rubbish and Di bioxin fire grate incinerating method, can realize as follows: rubbish enters fire grate 17 tops through garbage inlet 16, a wind up is blown into rubbish through fire grate 17 from fire grate 17 belows and burns burner hearth 2, rubbish in burning burner hearth 2 is finished drying, pyrolysis, fixed carbon burning and these four combustion processes of fixed carbon after-flame, the flue gas flow direction burning furnace outlet 14 of generation under through a wind action; Secondary wind, tertiary air, four wind and five wind are then respectively by secondary wind assembly 3, tertiary air assembly 4, the blowing assembly of four wind assemblies 5 and five wind assembly 6 formations is blown in the first passage 13, fully mix with the flue gas from burning furnace outlet 14, mixed flue gas forms two groups of circle of contacts by the blowing assembly in first passage 13 and spiralling flue gas stream 33(sees Fig. 4), the air output of the blowing nozzle by regulating the blowing assembly, temperature in the first passage 13 is controlled between 850 ℃～900 ℃, gas residence time is more than 2 seconds, flow to first passage outlet 9 at last, the slag that the rubbish afterburnt on fire grate 17 ends produces is then discharged from slag-drip opening 18, thereby finishes the low nitrogen of rubbish and Di bioxin fire grate burning process.
After temperature sensor 12 records flue-gas temperature, flue gas oxygen content with reference to first passage outlet 9, after computer calculating and proofreading and correct, controlled the air output of the blowing nozzle of each layers blowing assemblies by servo valve 7, and guarantee excess air coefficient the best, thereby when obtaining the rubbish efficient burning, the temperature in the assurance first passage 13 is between 850 ~ 900 ℃, gas residence time is more than 2 seconds, to suppress and to reduce NOx and Jiang the abundant after-flame of bioxin.
Embodiment of the present utility model is not restricted to the described embodiments; other are any not to deviate from change, the modification done under spiritual essence of the present utility model and the principle, substitute, combination, simplify; all should be the substitute mode of equivalence, be included within the protection domain of the present utility model.
Claims (5)
1. a rubbish hangs down nitrogen and low bioxin fire grate incinerator, comprise first passage and be arranged on the burning burner hearth of first passage bottom, it is characterized in that: be provided with the flue gas that makes in the first passage along the surroundings wall of first passage and form two groups of circle of contacts and spiralling blowing assembly.
2. rubbish according to claim 1 hangs down nitrogen and Di bioxin fire grate incinerator, and it is characterized in that: described blowing assembly is divided into four layers, is secondary wind assembly, tertiary air assembly, four wind assemblies, five wind assemblies from bottom to top successively; The structure of these four layers blowing assembly is identical, comprises back wall airduct assembly, left wall airduct assembly, front wall airduct assembly and right wall airduct assembly respectively.
3. rubbish according to claim 2 hangs down nitrogen and Di bioxin fire grate incinerator, it is characterized in that: described back wall airduct assembly, left wall airduct assembly, front wall airduct assembly and right wall airduct assembly are provided with stop valve, servo valve, connection airduct and blowing nozzle.
4. rubbish according to claim 1 hangs down nitrogen and low bioxin fire grate incinerator, it is characterized in that: described burning burner hearth is surrounded by rear arch, burning furnace outlet, face arch, garbage inlet, fire grate, slag-drip opening and left and right sides side wall and forms.
5. rubbish according to claim 4 hangs down nitrogen and Di bioxin fire grate incinerator, it is characterized in that: the wall of described first passage is provided with a plurality of temperature sensors, be arranged in burn between furnace outlet and the secondary wind assembly, between secondary wind assembly and the tertiary air assembly, between tertiary air assembly and four the wind assemblies, between four wind assemblies and five the wind assemblies, between five wind assemblies and first passage export.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220647254 CN203162960U (en) | 2012-11-29 | 2012-11-29 | Garbage low nitrogen and low dioxin fire grate incineration device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220647254 CN203162960U (en) | 2012-11-29 | 2012-11-29 | Garbage low nitrogen and low dioxin fire grate incineration device |
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| CN203162960U true CN203162960U (en) | 2013-08-28 |
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| CN 201220647254 Expired - Fee Related CN203162960U (en) | 2012-11-29 | 2012-11-29 | Garbage low nitrogen and low dioxin fire grate incineration device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102980194A (en) * | 2012-11-29 | 2013-03-20 | 华南理工大学 | Method for garbage low-nitrogen and low-dioxin grate incineration and device of method for garbage low-nitrogen and low-dioxin grate incineration |
| CN109716024A (en) * | 2016-08-25 | 2019-05-03 | 金炳台 | Boiler plant for castoff burning |
-
2012
- 2012-11-29 CN CN 201220647254 patent/CN203162960U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102980194A (en) * | 2012-11-29 | 2013-03-20 | 华南理工大学 | Method for garbage low-nitrogen and low-dioxin grate incineration and device of method for garbage low-nitrogen and low-dioxin grate incineration |
| CN102980194B (en) * | 2012-11-29 | 2015-09-02 | 华南理工大学 | A kind of low nitrogen of rubbish and Di bioxin fire grate incinerating method and device thereof |
| CN109716024A (en) * | 2016-08-25 | 2019-05-03 | 金炳台 | Boiler plant for castoff burning |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130828 Termination date: 20151129 |